Dramićanin, Tatjana

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The Role of TP53 and PTEN tumor suppressor genes in response to different breast cancer treatment modalities

Tanić, Nikola; Dramićanin, Tatjana; Milovanović, Zorka; Nedeljković, Milica; Tomić, Tijana; Ademović, Nejla; Murganić, Blagoje; Tanic, Nasta

(Serbian Society for Immunology, Molecular Oncology and Regenerative Medicine, 2022)

TY  - CONF
AU  - Tanić, Nikola
AU  - Dramićanin, Tatjana
AU  - Milovanović, Zorka
AU  - Nedeljković, Milica
AU  - Tomić, Tijana
AU  - Ademović, Nejla
AU  - Murganić, Blagoje
AU  - Tanic, Nasta
PY  - 2022
UR  - http://radar.ibiss.bg.ac.rs/handle/123456789/5773
AB  - Breast cancer (BC) is the most frequent type of malignancy and the leading cause
of cancer related death among women worldwide. More than 70% of all diagnosed invasive
BCs express steroid receptors and, as such, are subjected to endocrine therapy.
BC is exceptionally heterogeneous disease and therefore distinct treatment modalities
are necessary to address these differences. The aim of our study was to investigate
the impact of TP53 and PTEN tumor suppressor genes (TSGs) inactivation on BC
response to different treatment modalities, as well as, their possible cooperation, on
post-operative BC samples. To that end the patients were classified, based on applied
adjuvant therapy, into four distinct groups: those that received hormonal therapy
(HT) only, hormonal therapy combined with chemotherapy (HT/CHT), hormonal
therapy combined with chemo and biological therapy (HT/CHT/H), and other systemic
therapies that exclude HT (for example CHT or H). Functional inactivation of
TP53 and PTEN TSG’s were studied by mutation, loss of heterozygosity (LOH) and
hypermethylatyon analysis. Our results revealed that TP53 gene was altered in 63 out
of 90 specimens (70%), while the frequency of PTEN alterations was slightly lower,
54 out of 90 (60%) patients had inactivated PTEN. Simultaneous inactivation was
detected in 43 tested samples (48%) with significant association between two analyzed
TSGs. Further, we found that TP53 status has significant influence on patients’
therapy response. Patients with wild type TP53 show significantly better therapy response
regardless of the type of therapy, compared to carriers of altered p53 gene. In
support of this we showed that hormonally treated women with intact (wt) TP53 gene
had significantly longer survival rate (p=0.000001) when compared to: (i) hormonally
treated women with aberrant TP53gene, (ii) women with intact (wt) p53 subjected to
any of remaining three therapy combinations, and (iii) women with altered TP53 that
belong to second (HT/CHT), third (HT/CHT/H) or forth (systemic Th that exclude
HT) therapy group. Contrary to this, no significance was found between mutational status of PTEN and various treatment modalities. However, significant association
was found between the type of applied therapy and simultaneous alterations of these
two TSGs (p=0.00001).
AB  - Рак дојке је најчешћи тип малигнитета и водећи узрок смрти од канцера код
жена широм света. Више од 70% свих дијагностикованих инвазивних карцинома
дојке експримира стероидне рецепторе и као такви су подобни за ендокрину терапију. Канцер дојке је изузетно хетерогена болест и стога су неопходни различити модалитети лечења да би се превазишле ове разлике. Циљ нашег истраживања
био је да се испита утицај инактивације ТП53 и ПТЕН тумор супресорских гена
(ТСГ) у одговору на различите модалитете лечења на постоперативним узорцима
карцинома дојке. Са тим циљем пацијенткиње су класификоване, на основу примењене ађувантне терапије, у четири различите групе: оне које су примале само
хормонску терапију (ХТ), хормонску терапију у комбинацији са хемиотерапијом
(ХТ/ЦХТ), хормонску терапију у комбинацији са хемиотерапијом и биолошком
терапијом (ХТ). /ЦХТ/Х) и друге системске терапије које искључују ХТ (на пример ЦХТ или Х). Функционална инактивација ТП53 и ПТЕН тумор супресора
је студирана анализом мутационог статуса, губитка хетерозиготности (ЛОХ) и
анализом метилационог статуса. Наши резултати су показали да је ТП53 ген измењен код 63 од 90 узорака (70%), док је учесталост промена ПТЕН гена била
нешто нижа, 54 од 90 (60%) пацијената је имало инактивиран ПТЕН. Симултана
инактивација је детектована у 43 тестирана узорка (48%) са значајном повезаношћу инактивације два анализирана тумор супресор гена.
Даље, показали смо да статус ТП53 има значајан утицај на одговор пацијената
на терапију. Пацијенти са дивљим типом (wt) ТП53 показују значајно бољи терапијски одговор без обзира на врсту терапије, у поређењу са носиоцима измењеног TП53. У прилог овоме показали смо да су хормонски лечене жене са интактним (wt) ТП53 геном имале значајно већу стопу преживљавања (п=0,000001) у
поређењу са: (1) женама леченим хормонсом теерапијом са аберантним ТП53 геном, (2) женама са интактним (wt) TП53 подвргнутим било којој од преостале три терапијске комбинације, и (3) женама са измењеним ТП53 које припадају другој
(ХТ/ЦХТ), трећој (ХТ/ЦХТ/Х) или четвртој (системска терапија која искључује ХТ) терапијској групи. Супротно овоме, нисмо утврдили значајну асоцијацију
између мутационог статуса ПТЕН-а и различитих модалитета лечења. Међутим,
утврђена је значајна повезаност између врсте примењене терапије и истовремених промена ова два тумор супресор гена (п=0,00001).
PB  - Serbian Society for Immunology, Molecular Oncology and Regenerative Medicine
C3  - Abstract Book: First Serbian molecular medicine congress; 2022 Jun 16-18; Foča, Bosnia and Herzegovina
T1  - The Role of TP53 and PTEN tumor suppressor genes in response to different breast cancer treatment modalities
T1  - Улога ТП53 и ПТЕН тумор супресор гена у одговору на различите модалитете терапије канцера дојке
SP  - 94
EP  - 97
UR  - https://hdl.handle.net/21.15107/rcub_ibiss_5773
ER  - 
@conference{
author = "Tanić, Nikola and Dramićanin, Tatjana and Milovanović, Zorka and Nedeljković, Milica and Tomić, Tijana and Ademović, Nejla and Murganić, Blagoje and Tanic, Nasta",
year = "2022",
abstract = "Breast cancer (BC) is the most frequent type of malignancy and the leading cause
of cancer related death among women worldwide. More than 70% of all diagnosed invasive
BCs express steroid receptors and, as such, are subjected to endocrine therapy.
BC is exceptionally heterogeneous disease and therefore distinct treatment modalities
are necessary to address these differences. The aim of our study was to investigate
the impact of TP53 and PTEN tumor suppressor genes (TSGs) inactivation on BC
response to different treatment modalities, as well as, their possible cooperation, on
post-operative BC samples. To that end the patients were classified, based on applied
adjuvant therapy, into four distinct groups: those that received hormonal therapy
(HT) only, hormonal therapy combined with chemotherapy (HT/CHT), hormonal
therapy combined with chemo and biological therapy (HT/CHT/H), and other systemic
therapies that exclude HT (for example CHT or H). Functional inactivation of
TP53 and PTEN TSG’s were studied by mutation, loss of heterozygosity (LOH) and
hypermethylatyon analysis. Our results revealed that TP53 gene was altered in 63 out
of 90 specimens (70%), while the frequency of PTEN alterations was slightly lower,
54 out of 90 (60%) patients had inactivated PTEN. Simultaneous inactivation was
detected in 43 tested samples (48%) with significant association between two analyzed
TSGs. Further, we found that TP53 status has significant influence on patients’
therapy response. Patients with wild type TP53 show significantly better therapy response
regardless of the type of therapy, compared to carriers of altered p53 gene. In
support of this we showed that hormonally treated women with intact (wt) TP53 gene
had significantly longer survival rate (p=0.000001) when compared to: (i) hormonally
treated women with aberrant TP53gene, (ii) women with intact (wt) p53 subjected to
any of remaining three therapy combinations, and (iii) women with altered TP53 that
belong to second (HT/CHT), third (HT/CHT/H) or forth (systemic Th that exclude
HT) therapy group. Contrary to this, no significance was found between mutational status of PTEN and various treatment modalities. However, significant association
was found between the type of applied therapy and simultaneous alterations of these
two TSGs (p=0.00001)., Рак дојке је најчешћи тип малигнитета и водећи узрок смрти од канцера код
жена широм света. Више од 70% свих дијагностикованих инвазивних карцинома
дојке експримира стероидне рецепторе и као такви су подобни за ендокрину терапију. Канцер дојке је изузетно хетерогена болест и стога су неопходни различити модалитети лечења да би се превазишле ове разлике. Циљ нашег истраживања
био је да се испита утицај инактивације ТП53 и ПТЕН тумор супресорских гена
(ТСГ) у одговору на различите модалитете лечења на постоперативним узорцима
карцинома дојке. Са тим циљем пацијенткиње су класификоване, на основу примењене ађувантне терапије, у четири различите групе: оне које су примале само
хормонску терапију (ХТ), хормонску терапију у комбинацији са хемиотерапијом
(ХТ/ЦХТ), хормонску терапију у комбинацији са хемиотерапијом и биолошком
терапијом (ХТ). /ЦХТ/Х) и друге системске терапије које искључују ХТ (на пример ЦХТ или Х). Функционална инактивација ТП53 и ПТЕН тумор супресора
је студирана анализом мутационог статуса, губитка хетерозиготности (ЛОХ) и
анализом метилационог статуса. Наши резултати су показали да је ТП53 ген измењен код 63 од 90 узорака (70%), док је учесталост промена ПТЕН гена била
нешто нижа, 54 од 90 (60%) пацијената је имало инактивиран ПТЕН. Симултана
инактивација је детектована у 43 тестирана узорка (48%) са значајном повезаношћу инактивације два анализирана тумор супресор гена.
Даље, показали смо да статус ТП53 има значајан утицај на одговор пацијената
на терапију. Пацијенти са дивљим типом (wt) ТП53 показују значајно бољи терапијски одговор без обзира на врсту терапије, у поређењу са носиоцима измењеног TП53. У прилог овоме показали смо да су хормонски лечене жене са интактним (wt) ТП53 геном имале значајно већу стопу преживљавања (п=0,000001) у
поређењу са: (1) женама леченим хормонсом теерапијом са аберантним ТП53 геном, (2) женама са интактним (wt) TП53 подвргнутим било којој од преостале три терапијске комбинације, и (3) женама са измењеним ТП53 које припадају другој
(ХТ/ЦХТ), трећој (ХТ/ЦХТ/Х) или четвртој (системска терапија која искључује ХТ) терапијској групи. Супротно овоме, нисмо утврдили значајну асоцијацију
између мутационог статуса ПТЕН-а и различитих модалитета лечења. Међутим,
утврђена је значајна повезаност између врсте примењене терапије и истовремених промена ова два тумор супресор гена (п=0,00001).",
publisher = "Serbian Society for Immunology, Molecular Oncology and Regenerative Medicine",
journal = "Abstract Book: First Serbian molecular medicine congress; 2022 Jun 16-18; Foča, Bosnia and Herzegovina",
title = "The Role of TP53 and PTEN tumor suppressor genes in response to different breast cancer treatment modalities, Улога ТП53 и ПТЕН тумор супресор гена у одговору на различите модалитете терапије канцера дојке",
pages = "94-97",
url = "https://hdl.handle.net/21.15107/rcub_ibiss_5773"
}
Tanić, N., Dramićanin, T., Milovanović, Z., Nedeljković, M., Tomić, T., Ademović, N., Murganić, B.,& Tanic, N.. (2022). The Role of TP53 and PTEN tumor suppressor genes in response to different breast cancer treatment modalities. in Abstract Book: First Serbian molecular medicine congress; 2022 Jun 16-18; Foča, Bosnia and Herzegovina
Serbian Society for Immunology, Molecular Oncology and Regenerative Medicine., 94-97.
https://hdl.handle.net/21.15107/rcub_ibiss_5773
Tanić N, Dramićanin T, Milovanović Z, Nedeljković M, Tomić T, Ademović N, Murganić B, Tanic N. The Role of TP53 and PTEN tumor suppressor genes in response to different breast cancer treatment modalities. in Abstract Book: First Serbian molecular medicine congress; 2022 Jun 16-18; Foča, Bosnia and Herzegovina. 2022;:94-97.
https://hdl.handle.net/21.15107/rcub_ibiss_5773 .
Tanić, Nikola, Dramićanin, Tatjana, Milovanović, Zorka, Nedeljković, Milica, Tomić, Tijana, Ademović, Nejla, Murganić, Blagoje, Tanic, Nasta, "The Role of TP53 and PTEN tumor suppressor genes in response to different breast cancer treatment modalities" in Abstract Book: First Serbian molecular medicine congress; 2022 Jun 16-18; Foča, Bosnia and Herzegovina (2022):94-97,
https://hdl.handle.net/21.15107/rcub_ibiss_5773 .

The impact of TP53 and PTEN tumor suppressor genes on response to different breast cancer treatment modalities

Tanić, Nikola; Dramićanin, Tatjana; Ademović, Nejla; Tomić, Tijana; Murganić, Blagoje; Milovanović, Zorka; Nedeljković, Milica; Tanić, Nasta

(Republika Srpska, Bosna i Hercegovina: Univerzitet u Istočnom Sarajevu - Medicinski fakultet Foča, 2022)

TY  - JOUR
AU  - Tanić, Nikola
AU  - Dramićanin, Tatjana
AU  - Ademović, Nejla
AU  - Tomić, Tijana
AU  - Murganić, Blagoje
AU  - Milovanović, Zorka
AU  - Nedeljković, Milica
AU  - Tanić, Nasta
PY  - 2022
UR  - http://radar.ibiss.bg.ac.rs/handle/123456789/5362
AB  - Introduction. Breast cancer (BC) is the most frequent type of malignancy and the leading cause of cancer related death among women worldwide. BC is exceptionally heterogeneous disease and therefore distinct treatment modalities are necessary to address these differences. The aim of our study was to investigate the impact of TP53 and PTEN tumor suppressor genes (TSGs) inactivation on BC response to different treatment modalities and their possible cooperation, on post-operative BC samples.
Methods. Patients were classified, based on applied adjuvant therapy, into four distinct groups: those that received hormonal therapy (HT) only, hormonal therapy combined with chemotherapy (HT/CHT), hormonal therapy combined with chemo and biological therapy (HT/CHT/H), and other systemic therapies that exclude HT. Functional inactivation of TP53 and PTEN TSG’s were studied by mutation, loss of heterozygosity (LOH) and hypermethylation analysis.
Results. Our results revealed that TP53 gene was altered in 63 out of 90 specimens (70%), while the frequency of PTEN alterations was slightly lower, 54 out of 90 (60%). Simultaneous inactivation was detected in 43 tested samples (48%) with significant association between two analyzed TSGs. Further, we found that TP53 status has significant influence on patients’ therapy response. Contrary to this, no significance was found between mutational status of PTEN and various treatment modalities. However, significant association was found between the type of applied therapy and simultaneous alterations of these two TSGs (p = 0.00001). 
Conclusion. Patients with wtTP53 show significantly better therapy response regardless of the type of therapy, compared to carriers of altered TPp53 gene.
AB  - Uvod. Rak dojke (RD) je najčešći tip maligniteta i vodeći uzrok smrti od raka kod žena širom sveta. RD
je izuzetno heterogena bolest i stoga su neophodni različiti modaliteti lečenja da bi se pokrile ove
razlike. Cilj našeg istraživanja je bio da se ispita uticaj inaktivacije TP53 i PTEN tumor supresorskih
gena (TSG) na odgovor RD na različite modalitete lečenja, kao i njihova moguća saradnja u tome, na
postoperativnim uzorcima RD.
Metode. Pacijentkinje su klasifikovane, na osnovu primenjene adjuvantne terapije, u četiri različite
grupe: one koje su primale samo hormonsku terapiju (HT), hormonsku terapiju u kombinaciji sa hemoterapijom (HT/CHT), hormonsku terapiju u kombinaciji sa hemoterapijom i biološkom terapijom
(HT/CHT/H) i druge sistemske terapije koje isključuju HT. Funkcionalna inaktivacija TP53 i PTEN TSG
je proučavana analizom mutacionog statusa, gubitka heterozigotnosti (LOH) i metilacionog statusa.
Rezultati. Naši rezultati su pokazali da je TP53 gen izmenjen kod 63 od 90 pacijenata (70%), dok je
učestalost promena PTEN gena bila nešto niža, 54 od 90 (60%). Simultana inaktivacija je detektovana
u 43 testirana uzorka (48%) sa značajnom povezanošću između dva analizirana TSG-a. Dalje, pokazali
smo da status TP53 ima značajan uticaj na odgovor pacijenata na terapiju. Suprotno ovome, nismo
pokazali značajnu asocijaciju između mutacionog statusa PTEN-a i različitih modaliteta lečenja. Međutim, utvrđena je značajna povezanost između primenjenih terapija i simultanih inaktivacija ova
dva TSG-a (p = 0,00001).
Zaključak. Pacijenti sa wtTP53 pokazuju značajno bolji terapijski odgovor bez obzira na vrstu terapije u poređenju sa nosiocima mutiranog TP53 gena.
PB  - Republika Srpska, Bosna i Hercegovina: Univerzitet u Istočnom Sarajevu - Medicinski fakultet Foča
T2  - Biomedicinska istraživanja
T1  - The impact of TP53 and PTEN tumor suppressor genes on response to different breast cancer treatment modalities
T1  - Uticaj tumor supresorskih gena TP53 i PTEN na odgovor na različite načine lečenja raka dojke
IS  - 2
VL  - 13
DO  - 10.5937/BII2202105T
ER  - 
@article{
author = "Tanić, Nikola and Dramićanin, Tatjana and Ademović, Nejla and Tomić, Tijana and Murganić, Blagoje and Milovanović, Zorka and Nedeljković, Milica and Tanić, Nasta",
year = "2022",
abstract = "Introduction. Breast cancer (BC) is the most frequent type of malignancy and the leading cause of cancer related death among women worldwide. BC is exceptionally heterogeneous disease and therefore distinct treatment modalities are necessary to address these differences. The aim of our study was to investigate the impact of TP53 and PTEN tumor suppressor genes (TSGs) inactivation on BC response to different treatment modalities and their possible cooperation, on post-operative BC samples.
Methods. Patients were classified, based on applied adjuvant therapy, into four distinct groups: those that received hormonal therapy (HT) only, hormonal therapy combined with chemotherapy (HT/CHT), hormonal therapy combined with chemo and biological therapy (HT/CHT/H), and other systemic therapies that exclude HT. Functional inactivation of TP53 and PTEN TSG’s were studied by mutation, loss of heterozygosity (LOH) and hypermethylation analysis.
Results. Our results revealed that TP53 gene was altered in 63 out of 90 specimens (70%), while the frequency of PTEN alterations was slightly lower, 54 out of 90 (60%). Simultaneous inactivation was detected in 43 tested samples (48%) with significant association between two analyzed TSGs. Further, we found that TP53 status has significant influence on patients’ therapy response. Contrary to this, no significance was found between mutational status of PTEN and various treatment modalities. However, significant association was found between the type of applied therapy and simultaneous alterations of these two TSGs (p = 0.00001). 
Conclusion. Patients with wtTP53 show significantly better therapy response regardless of the type of therapy, compared to carriers of altered TPp53 gene., Uvod. Rak dojke (RD) je najčešći tip maligniteta i vodeći uzrok smrti od raka kod žena širom sveta. RD
je izuzetno heterogena bolest i stoga su neophodni različiti modaliteti lečenja da bi se pokrile ove
razlike. Cilj našeg istraživanja je bio da se ispita uticaj inaktivacije TP53 i PTEN tumor supresorskih
gena (TSG) na odgovor RD na različite modalitete lečenja, kao i njihova moguća saradnja u tome, na
postoperativnim uzorcima RD.
Metode. Pacijentkinje su klasifikovane, na osnovu primenjene adjuvantne terapije, u četiri različite
grupe: one koje su primale samo hormonsku terapiju (HT), hormonsku terapiju u kombinaciji sa hemoterapijom (HT/CHT), hormonsku terapiju u kombinaciji sa hemoterapijom i biološkom terapijom
(HT/CHT/H) i druge sistemske terapije koje isključuju HT. Funkcionalna inaktivacija TP53 i PTEN TSG
je proučavana analizom mutacionog statusa, gubitka heterozigotnosti (LOH) i metilacionog statusa.
Rezultati. Naši rezultati su pokazali da je TP53 gen izmenjen kod 63 od 90 pacijenata (70%), dok je
učestalost promena PTEN gena bila nešto niža, 54 od 90 (60%). Simultana inaktivacija je detektovana
u 43 testirana uzorka (48%) sa značajnom povezanošću između dva analizirana TSG-a. Dalje, pokazali
smo da status TP53 ima značajan uticaj na odgovor pacijenata na terapiju. Suprotno ovome, nismo
pokazali značajnu asocijaciju između mutacionog statusa PTEN-a i različitih modaliteta lečenja. Međutim, utvrđena je značajna povezanost između primenjenih terapija i simultanih inaktivacija ova
dva TSG-a (p = 0,00001).
Zaključak. Pacijenti sa wtTP53 pokazuju značajno bolji terapijski odgovor bez obzira na vrstu terapije u poređenju sa nosiocima mutiranog TP53 gena.",
publisher = "Republika Srpska, Bosna i Hercegovina: Univerzitet u Istočnom Sarajevu - Medicinski fakultet Foča",
journal = "Biomedicinska istraživanja",
title = "The impact of TP53 and PTEN tumor suppressor genes on response to different breast cancer treatment modalities, Uticaj tumor supresorskih gena TP53 i PTEN na odgovor na različite načine lečenja raka dojke",
number = "2",
volume = "13",
doi = "10.5937/BII2202105T"
}
Tanić, N., Dramićanin, T., Ademović, N., Tomić, T., Murganić, B., Milovanović, Z., Nedeljković, M.,& Tanić, N.. (2022). The impact of TP53 and PTEN tumor suppressor genes on response to different breast cancer treatment modalities. in Biomedicinska istraživanja
Republika Srpska, Bosna i Hercegovina: Univerzitet u Istočnom Sarajevu - Medicinski fakultet Foča., 13(2).
https://doi.org/10.5937/BII2202105T
Tanić N, Dramićanin T, Ademović N, Tomić T, Murganić B, Milovanović Z, Nedeljković M, Tanić N. The impact of TP53 and PTEN tumor suppressor genes on response to different breast cancer treatment modalities. in Biomedicinska istraživanja. 2022;13(2).
doi:10.5937/BII2202105T .
Tanić, Nikola, Dramićanin, Tatjana, Ademović, Nejla, Tomić, Tijana, Murganić, Blagoje, Milovanović, Zorka, Nedeljković, Milica, Tanić, Nasta, "The impact of TP53 and PTEN tumor suppressor genes on response to different breast cancer treatment modalities" in Biomedicinska istraživanja, 13, no. 2 (2022),
https://doi.org/10.5937/BII2202105T . .

Role of TP53 and PTEN tumor suppressor genes alterations in breast cancer response to therapy

Nedeljković, Milica; Dramićanin, Tatjana; Prvanović, Mirjana; Murganić, Blagoje; Tomić, Tijana; Ademović, Nejla; Milovanović, Zorka; Tanić, Nikola; Tanić, Nasta

(Beograd : Srpsko društvo istraživača raka, 2021)

TY  - CONF
AU  - Nedeljković, Milica
AU  - Dramićanin, Tatjana
AU  - Prvanović, Mirjana
AU  - Murganić, Blagoje
AU  - Tomić, Tijana
AU  - Ademović, Nejla
AU  - Milovanović, Zorka
AU  - Tanić, Nikola
AU  - Tanić, Nasta
PY  - 2021
UR  - http://radar.ibiss.bg.ac.rs/handle/123456789/6692
AB  - Background: Breast cancer (BC) is the most frequent type of malignancy and the leading cause of cancer related death among women worldwide. Multiple interconnected factors determine BC response to therapy and clinical outcome. TP53 and PTEN are the most frequently altered tumor suppressor genes (TSGs) in human cancers. Material and methods: To determine the potential influence of TSGs on the response to therapy we analyzed alterations of TP53 and PTEN in 90 BC specimens. The specimens were stratified based on systemic adjuvant therapy (hormonal therapy only (HT), HT and chemotherapy (HT/CHT), HT/CHT and biological therapy (HT/CHT/H). Functional inactivation of TP53 by mutations and/or loss of heterozygosity (LOH) and PTEN by LOH and/or promoter hypermethylation, were tested using single-strand conformational polymorphism (SSCP) analysis, gene sequencing, fragment analysis and methylation-specific PCR (MS-PCR) methods respectively. Results: Altered TP53 was found in 63/90 specimens (70%) while 54/90 (60%) had inactivated PTEN. Inactivation of PTEN was more frequent in tumors with altered TP53. Patients with altered TP53, lived shorter (p=0.0007) compared to those with wild type (wt) gene. The survival of patients with both TSGs altered was shorter compared to wt genes (p=0.024). Patients with wtTP53 treated with HT had longer survival (p=0.000001) when compared to all other groups. Women with both TSGs altered who received tamoxifen lived shorter than those on HT with both/one TSGs intact (p = 0.03). Conclusion: Patients with wtTP53 showed significantly better therapy response regardless of type of therapy, compared to carriers of altered TP53.
PB  - Beograd : Srpsko društvo istraživača raka
C3  - Abstract book: 5th Congress of the Serbian Association for Cancer Research with International Participation SDIR-5: Translational Potential of Cancer Research in Serbia; 2021 Dec 3; Virtual event
T1  - Role of TP53 and PTEN tumor suppressor genes alterations in breast cancer response to therapy
SP  - 38
UR  - https://hdl.handle.net/21.15107/rcub_ibiss_6692
ER  - 
@conference{
author = "Nedeljković, Milica and Dramićanin, Tatjana and Prvanović, Mirjana and Murganić, Blagoje and Tomić, Tijana and Ademović, Nejla and Milovanović, Zorka and Tanić, Nikola and Tanić, Nasta",
year = "2021",
abstract = "Background: Breast cancer (BC) is the most frequent type of malignancy and the leading cause of cancer related death among women worldwide. Multiple interconnected factors determine BC response to therapy and clinical outcome. TP53 and PTEN are the most frequently altered tumor suppressor genes (TSGs) in human cancers. Material and methods: To determine the potential influence of TSGs on the response to therapy we analyzed alterations of TP53 and PTEN in 90 BC specimens. The specimens were stratified based on systemic adjuvant therapy (hormonal therapy only (HT), HT and chemotherapy (HT/CHT), HT/CHT and biological therapy (HT/CHT/H). Functional inactivation of TP53 by mutations and/or loss of heterozygosity (LOH) and PTEN by LOH and/or promoter hypermethylation, were tested using single-strand conformational polymorphism (SSCP) analysis, gene sequencing, fragment analysis and methylation-specific PCR (MS-PCR) methods respectively. Results: Altered TP53 was found in 63/90 specimens (70%) while 54/90 (60%) had inactivated PTEN. Inactivation of PTEN was more frequent in tumors with altered TP53. Patients with altered TP53, lived shorter (p=0.0007) compared to those with wild type (wt) gene. The survival of patients with both TSGs altered was shorter compared to wt genes (p=0.024). Patients with wtTP53 treated with HT had longer survival (p=0.000001) when compared to all other groups. Women with both TSGs altered who received tamoxifen lived shorter than those on HT with both/one TSGs intact (p = 0.03). Conclusion: Patients with wtTP53 showed significantly better therapy response regardless of type of therapy, compared to carriers of altered TP53.",
publisher = "Beograd : Srpsko društvo istraživača raka",
journal = "Abstract book: 5th Congress of the Serbian Association for Cancer Research with International Participation SDIR-5: Translational Potential of Cancer Research in Serbia; 2021 Dec 3; Virtual event",
title = "Role of TP53 and PTEN tumor suppressor genes alterations in breast cancer response to therapy",
pages = "38",
url = "https://hdl.handle.net/21.15107/rcub_ibiss_6692"
}
Nedeljković, M., Dramićanin, T., Prvanović, M., Murganić, B., Tomić, T., Ademović, N., Milovanović, Z., Tanić, N.,& Tanić, N.. (2021). Role of TP53 and PTEN tumor suppressor genes alterations in breast cancer response to therapy. in Abstract book: 5th Congress of the Serbian Association for Cancer Research with International Participation SDIR-5: Translational Potential of Cancer Research in Serbia; 2021 Dec 3; Virtual event
Beograd : Srpsko društvo istraživača raka., 38.
https://hdl.handle.net/21.15107/rcub_ibiss_6692
Nedeljković M, Dramićanin T, Prvanović M, Murganić B, Tomić T, Ademović N, Milovanović Z, Tanić N, Tanić N. Role of TP53 and PTEN tumor suppressor genes alterations in breast cancer response to therapy. in Abstract book: 5th Congress of the Serbian Association for Cancer Research with International Participation SDIR-5: Translational Potential of Cancer Research in Serbia; 2021 Dec 3; Virtual event. 2021;:38.
https://hdl.handle.net/21.15107/rcub_ibiss_6692 .
Nedeljković, Milica, Dramićanin, Tatjana, Prvanović, Mirjana, Murganić, Blagoje, Tomić, Tijana, Ademović, Nejla, Milovanović, Zorka, Tanić, Nikola, Tanić, Nasta, "Role of TP53 and PTEN tumor suppressor genes alterations in breast cancer response to therapy" in Abstract book: 5th Congress of the Serbian Association for Cancer Research with International Participation SDIR-5: Translational Potential of Cancer Research in Serbia; 2021 Dec 3; Virtual event (2021):38,
https://hdl.handle.net/21.15107/rcub_ibiss_6692 .

Importance of Copy Number Alterations of FGFR1 and C-MYC Genes in Triple Negative Breast Cancer

Nedeljković, Milica; Tanić, Nikola; Dramićanin, Tatjana; Milovanović, Zorka; Šušnjar, Snežana; Milinković, Vedrana; Vujović, Ivana; Tanić, Nasta

(2018)

TY  - JOUR
AU  - Nedeljković, Milica
AU  - Tanić, Nikola
AU  - Dramićanin, Tatjana
AU  - Milovanović, Zorka
AU  - Šušnjar, Snežana
AU  - Milinković, Vedrana
AU  - Vujović, Ivana
AU  - Tanić, Nasta
PY  - 2018
UR  - http://content.sciendo.com/view/journals/jomb/ahead-of-print/article-10.1515-jomb-2018-0012.xml
UR  - https://radar.ibiss.bg.ac.rs/handle/123456789/3062
AB  - Background: Triple negative breast cancer (TNBC) is characterized by aggressive clinical course and is unresponsive to anti-HER2 and endocrine therapy. TNBC is difficult to treat and is often lethal. Given the need to find new targets for therapy we explored clinicopathological significance of copy number gain of FGFR1 and c-MYC. Our aim was to determine the impact of FGFR1 and c-MYC copy number gain on clinical course and outcome of TNBC. Methods: FGFR1 and c-MYC gene copy number alterations were evaluated in 78 archive TNBC samples using TaqMan based quantitative real time PCR assays. Results: 50% of samples had increased c-MYC copy number. c-MYC copy number gain was associated with TNBC in contrast to ER positive cancers. Our results showed significant correlation between c-MYC copy number gain and high grade of TNBCs. This suggests that c-MYC copy number could be an useful prognostic marker for TNBC patients. c-MYC copy number gain was associated with high pTNM stage as well as lobular and medullary tumor subtypes. 43% of samples had increased FGFR1 copy number. No correlations between FGFR1 copy number gain and clinicopathological variables were observed. Conclusions: We identified c-MYC copy number gain as a prognostic marker for TNBC. Our results indicate that c- MYC may contribute to TNBC progression. We observed no significant association between c-MYC and/or FGFR1 copy number status and patient survival.
T2  - Journal of Medical Biochemistry
T1  - Importance of Copy Number Alterations of FGFR1 and C-MYC Genes in Triple Negative Breast Cancer
DO  - 10.1515/jomb-2018-0012
ER  - 
@article{
author = "Nedeljković, Milica and Tanić, Nikola and Dramićanin, Tatjana and Milovanović, Zorka and Šušnjar, Snežana and Milinković, Vedrana and Vujović, Ivana and Tanić, Nasta",
year = "2018",
abstract = "Background: Triple negative breast cancer (TNBC) is characterized by aggressive clinical course and is unresponsive to anti-HER2 and endocrine therapy. TNBC is difficult to treat and is often lethal. Given the need to find new targets for therapy we explored clinicopathological significance of copy number gain of FGFR1 and c-MYC. Our aim was to determine the impact of FGFR1 and c-MYC copy number gain on clinical course and outcome of TNBC. Methods: FGFR1 and c-MYC gene copy number alterations were evaluated in 78 archive TNBC samples using TaqMan based quantitative real time PCR assays. Results: 50% of samples had increased c-MYC copy number. c-MYC copy number gain was associated with TNBC in contrast to ER positive cancers. Our results showed significant correlation between c-MYC copy number gain and high grade of TNBCs. This suggests that c-MYC copy number could be an useful prognostic marker for TNBC patients. c-MYC copy number gain was associated with high pTNM stage as well as lobular and medullary tumor subtypes. 43% of samples had increased FGFR1 copy number. No correlations between FGFR1 copy number gain and clinicopathological variables were observed. Conclusions: We identified c-MYC copy number gain as a prognostic marker for TNBC. Our results indicate that c- MYC may contribute to TNBC progression. We observed no significant association between c-MYC and/or FGFR1 copy number status and patient survival.",
journal = "Journal of Medical Biochemistry",
title = "Importance of Copy Number Alterations of FGFR1 and C-MYC Genes in Triple Negative Breast Cancer",
doi = "10.1515/jomb-2018-0012"
}
Nedeljković, M., Tanić, N., Dramićanin, T., Milovanović, Z., Šušnjar, S., Milinković, V., Vujović, I.,& Tanić, N.. (2018). Importance of Copy Number Alterations of FGFR1 and C-MYC Genes in Triple Negative Breast Cancer. in Journal of Medical Biochemistry.
https://doi.org/10.1515/jomb-2018-0012
Nedeljković M, Tanić N, Dramićanin T, Milovanović Z, Šušnjar S, Milinković V, Vujović I, Tanić N. Importance of Copy Number Alterations of FGFR1 and C-MYC Genes in Triple Negative Breast Cancer. in Journal of Medical Biochemistry. 2018;.
doi:10.1515/jomb-2018-0012 .
Nedeljković, Milica, Tanić, Nikola, Dramićanin, Tatjana, Milovanović, Zorka, Šušnjar, Snežana, Milinković, Vedrana, Vujović, Ivana, Tanić, Nasta, "Importance of Copy Number Alterations of FGFR1 and C-MYC Genes in Triple Negative Breast Cancer" in Journal of Medical Biochemistry (2018),
https://doi.org/10.1515/jomb-2018-0012 . .
1

Amplifikacija ciklin D1, c-myc i EGFR onkogena u tumorskim uzorcima pacijentkinja obolelih od kancera dojke

Tanić, Nasta; Milinković, Vedrana; Dramićanin, Tatjana; Nedeljković, Milica; Stanković, Tijana; Milovanović, Zorka; Šušnjar, Snežana; Milošević, Verica; Šošić-Jurjević, Branka ; Džodić, Radan; Tanić, Nikola

(2013)

TY  - JOUR
AU  - Tanić, Nasta
AU  - Milinković, Vedrana
AU  - Dramićanin, Tatjana
AU  - Nedeljković, Milica
AU  - Stanković, Tijana
AU  - Milovanović, Zorka
AU  - Šušnjar, Snežana
AU  - Milošević, Verica
AU  - Šošić-Jurjević, Branka 
AU  - Džodić, Radan
AU  - Tanić, Nikola
PY  - 2013
UR  - https://radar.ibiss.bg.ac.rs/handle/123456789/502
AB  - Background: Breast cancer is the most common form of cancer in women. It arises from multiple genetic changes in oncogenes and tumor suppressor genes. Among so far studied oncogenes relatively few, including epdermal growth factor receptor (EGfR), cyclinD1 (CCNDİ)and c-myc, have been found to play an important role in progression of this type of human malignancy. The aim of this study was to examine the prognostic potential of CCND1, c-myc and EGFR amplification and their possible cooperation in breast carcinogenesis. Methods: Copy number analyses of CCND1 and c-myc genes were done by TaqMan based quantitative real time PCR. Amplification status of EGFR was determined by differential Pcr. Results: Amplification of CCND1, c-myc and EGFR oncogene has been found in 20.4%, 26.5% and 26.5% of breast cancer cases, respectively. Analysis showed that amplification of CCND1 oncogene was significantly associated with the stage II of disease while amplification of EGFR gene was significantly associated with overexpression of HER-2/neu. Tumour stage and expression of HER-2/neu appeared to be significant predictors of patient's outcome. Stage I patients lived significantly longer then stage III patients (p=0.04) while patients with HER-2/neu overexpression had worse prognoses and lived significantly shorter (p=0.001). Finally, survival of patients who underwent hormone therapy only was significantly longer (p=0.001) then survival of the rest of patients. Conclusions: Amplification of CCND1 or EGFR oncogene is associated with the progression of breast cancer and bad prognosis. No co-ordination in amplification of CCND1, c-myc and EGFR oncogenes were established in this cohort of breast cancer patients.
AB  - Uvod: Kancer dojke je najčešći tip maligniteta koji se javljaju kod žena. Tumori dojke nastaju kao rezultat akumulacije genetičkih promena kako u onkogenima tako i u tumor supresorskim genima. Među mnogim onkogenima čija je uloga u genezi tumora dojke ispitivana do danas, samo se neki smatraju značajnim za razviće ovih karcinoma. U tu se grupu svakako ubrajaju receptor za epidermalni factor rasta (EGFR), c-myc i ciklinD1 (CCND1). Cilj rada je bio utvrditi prognostički značaj amplifikacije CCND1, c-myc i EGFR onkogena u razviću tumora dojke kao i eventualne međusobne koalteracije ovih gena. Metode: Amplifikacioni status CCND1 i c-myc gena određen je kvantitativnim PCR-om u realnom vremenu, a amplifikacioni status EGFR onkogena je definisan diferencijalnim PCR-om. Rezultati: Amplifikacija CCND1 gena detektovana je kod 20.4%, a c-myc i EGFR onkogena kod 26.5% ispitanih uzoraka. Analize su pokazale da je amplifikacija CCND1 onkogena statistički značajno povezana sa stadijumom II tumora dojke kao i da amplifikacija EGFR-a značajno korelira sa povećanom ekspresijom HER2/neu. Analize kliničkih i histopatoloških parametara su jasno pokazale da stadijum tumora i nivo ekspresije HER2/neu gena predstavljaju značajne pokazatelje daljeg toka bolesti, odnosno sudbine pacijenta. Utvrđeno je da pacijentkinje sa tumorima dojke stadijuma I žive značajno duže od onih sa tumorom stadijuma III (p= 0.04) kao i da pacijentkinje sa HER2/neu pozitivnim statusom imaju goru prognozu i žive značajno krace (p=0.001). Na kraju, studija je pokazala da pacijentkinje podvrgnute samo hormonskoj terapiji imaju najbolju prognozu i žive značajno duže od ostalih (p=0.001). Zaključak: Amplifikacija CCND1 i EGFR onkogena je povezana sa lošom prognozom i progresijom karcinoma dojke. U ispitivanom tumorskom uzorku nisu detektovane nikakve koalteracije CCND1, c-myc i EGFR onkogena.
T2  - Journal of Medical Biochemistry
T1  - Amplifikacija ciklin D1, c-myc i EGFR onkogena u tumorskim uzorcima pacijentkinja obolelih od kancera dojke
T1  - Amplification of cycline D1, c-myc and EGFR oncogenes in tumour samples of breast cancer patients
IS  - 4
VL  - 32
DO  - 10.2478/jomb-2014-0005
SP  - 339
EP  - 346
UR  - https://hdl.handle.net/21.15107/rcub_ibiss_502
ER  - 
@article{
author = "Tanić, Nasta and Milinković, Vedrana and Dramićanin, Tatjana and Nedeljković, Milica and Stanković, Tijana and Milovanović, Zorka and Šušnjar, Snežana and Milošević, Verica and Šošić-Jurjević, Branka  and Džodić, Radan and Tanić, Nikola",
year = "2013",
abstract = "Background: Breast cancer is the most common form of cancer in women. It arises from multiple genetic changes in oncogenes and tumor suppressor genes. Among so far studied oncogenes relatively few, including epdermal growth factor receptor (EGfR), cyclinD1 (CCNDİ)and c-myc, have been found to play an important role in progression of this type of human malignancy. The aim of this study was to examine the prognostic potential of CCND1, c-myc and EGFR amplification and their possible cooperation in breast carcinogenesis. Methods: Copy number analyses of CCND1 and c-myc genes were done by TaqMan based quantitative real time PCR. Amplification status of EGFR was determined by differential Pcr. Results: Amplification of CCND1, c-myc and EGFR oncogene has been found in 20.4%, 26.5% and 26.5% of breast cancer cases, respectively. Analysis showed that amplification of CCND1 oncogene was significantly associated with the stage II of disease while amplification of EGFR gene was significantly associated with overexpression of HER-2/neu. Tumour stage and expression of HER-2/neu appeared to be significant predictors of patient's outcome. Stage I patients lived significantly longer then stage III patients (p=0.04) while patients with HER-2/neu overexpression had worse prognoses and lived significantly shorter (p=0.001). Finally, survival of patients who underwent hormone therapy only was significantly longer (p=0.001) then survival of the rest of patients. Conclusions: Amplification of CCND1 or EGFR oncogene is associated with the progression of breast cancer and bad prognosis. No co-ordination in amplification of CCND1, c-myc and EGFR oncogenes were established in this cohort of breast cancer patients., Uvod: Kancer dojke je najčešći tip maligniteta koji se javljaju kod žena. Tumori dojke nastaju kao rezultat akumulacije genetičkih promena kako u onkogenima tako i u tumor supresorskim genima. Među mnogim onkogenima čija je uloga u genezi tumora dojke ispitivana do danas, samo se neki smatraju značajnim za razviće ovih karcinoma. U tu se grupu svakako ubrajaju receptor za epidermalni factor rasta (EGFR), c-myc i ciklinD1 (CCND1). Cilj rada je bio utvrditi prognostički značaj amplifikacije CCND1, c-myc i EGFR onkogena u razviću tumora dojke kao i eventualne međusobne koalteracije ovih gena. Metode: Amplifikacioni status CCND1 i c-myc gena određen je kvantitativnim PCR-om u realnom vremenu, a amplifikacioni status EGFR onkogena je definisan diferencijalnim PCR-om. Rezultati: Amplifikacija CCND1 gena detektovana je kod 20.4%, a c-myc i EGFR onkogena kod 26.5% ispitanih uzoraka. Analize su pokazale da je amplifikacija CCND1 onkogena statistički značajno povezana sa stadijumom II tumora dojke kao i da amplifikacija EGFR-a značajno korelira sa povećanom ekspresijom HER2/neu. Analize kliničkih i histopatoloških parametara su jasno pokazale da stadijum tumora i nivo ekspresije HER2/neu gena predstavljaju značajne pokazatelje daljeg toka bolesti, odnosno sudbine pacijenta. Utvrđeno je da pacijentkinje sa tumorima dojke stadijuma I žive značajno duže od onih sa tumorom stadijuma III (p= 0.04) kao i da pacijentkinje sa HER2/neu pozitivnim statusom imaju goru prognozu i žive značajno krace (p=0.001). Na kraju, studija je pokazala da pacijentkinje podvrgnute samo hormonskoj terapiji imaju najbolju prognozu i žive značajno duže od ostalih (p=0.001). Zaključak: Amplifikacija CCND1 i EGFR onkogena je povezana sa lošom prognozom i progresijom karcinoma dojke. U ispitivanom tumorskom uzorku nisu detektovane nikakve koalteracije CCND1, c-myc i EGFR onkogena.",
journal = "Journal of Medical Biochemistry",
title = "Amplifikacija ciklin D1, c-myc i EGFR onkogena u tumorskim uzorcima pacijentkinja obolelih od kancera dojke, Amplification of cycline D1, c-myc and EGFR oncogenes in tumour samples of breast cancer patients",
number = "4",
volume = "32",
doi = "10.2478/jomb-2014-0005",
pages = "339-346",
url = "https://hdl.handle.net/21.15107/rcub_ibiss_502"
}
Tanić, N., Milinković, V., Dramićanin, T., Nedeljković, M., Stanković, T., Milovanović, Z., Šušnjar, S., Milošević, V., Šošić-Jurjević, B., Džodić, R.,& Tanić, N.. (2013). Amplifikacija ciklin D1, c-myc i EGFR onkogena u tumorskim uzorcima pacijentkinja obolelih od kancera dojke. in Journal of Medical Biochemistry, 32(4), 339-346.
https://doi.org/10.2478/jomb-2014-0005
https://hdl.handle.net/21.15107/rcub_ibiss_502
Tanić N, Milinković V, Dramićanin T, Nedeljković M, Stanković T, Milovanović Z, Šušnjar S, Milošević V, Šošić-Jurjević B, Džodić R, Tanić N. Amplifikacija ciklin D1, c-myc i EGFR onkogena u tumorskim uzorcima pacijentkinja obolelih od kancera dojke. in Journal of Medical Biochemistry. 2013;32(4):339-346.
doi:10.2478/jomb-2014-0005
https://hdl.handle.net/21.15107/rcub_ibiss_502 .
Tanić, Nasta, Milinković, Vedrana, Dramićanin, Tatjana, Nedeljković, Milica, Stanković, Tijana, Milovanović, Zorka, Šušnjar, Snežana, Milošević, Verica, Šošić-Jurjević, Branka , Džodić, Radan, Tanić, Nikola, "Amplifikacija ciklin D1, c-myc i EGFR onkogena u tumorskim uzorcima pacijentkinja obolelih od kancera dojke" in Journal of Medical Biochemistry, 32, no. 4 (2013):339-346,
https://doi.org/10.2478/jomb-2014-0005 .,
https://hdl.handle.net/21.15107/rcub_ibiss_502 .
4
1
4

Simultana alteracija TP53 i c-myc gena - obeležje progresije oralnih karcinoma

Tanić, Nasta; Milašin, Jelena; Dramićanin, Tatjana; Bošković, Maja; Vukadinović, Miroslav; Milošević, Verica; Tanić, Nikola

(2013)

TY  - JOUR
AU  - Tanić, Nasta
AU  - Milašin, Jelena
AU  - Dramićanin, Tatjana
AU  - Bošković, Maja
AU  - Vukadinović, Miroslav
AU  - Milošević, Verica
AU  - Tanić, Nikola
PY  - 2013
PY  - 2013
UR  - https://radar.ibiss.bg.ac.rs/handle/123456789/505
AB  - Background: Head and neck squamous cell carcinoma, including oral cancer, is the sixth most common cancer worldwide. Despite advances in surgery and treatment, the 5-year survival rate has not improved significantly. Therefore, reliable molecular markers for oral cancer progression are badly needed. Methods: We conducted a copy number analysis to estimate amplification status of c-myc, cycD1 and EGFR oncogenes, mutational PCR-SSCP analysis to determine activation of H-ras oncogene and inactivation of TP53 tumour suppressor gene and methylation specific PCR analysis to evaluate hypermethylation of p16 and MGMT genes. Results: c-myc oncogene was amplified in 56.7%, cycDI in 20% and EGFR in 16.7% of Oral Squamous Cell Carcinoma (OSCC) cases while H-ras was activated in 33.3% of samples. Amplification of c-myc was significantly associated with the tumour grade 2. Interestingly, EGFR and H-ras alterations were mutually exclusive. p16 and MGMT were inactivated by hypermethylation in 30% and 13.3% of cases. Co-alteration of cycDI and p16 were not observed in any of the analyzed samples. TP53 was inactivated in 56.7% of samples and was significantly associated with progression of OSCC, grade 2 and stage 2. Moreover, TP53 and c-myc oncogene were simultaneously altered in grade 2 OSCC. Conclusions: The most promising marker of OSCC progression remains the TP53 tumour suppressor, which is the most frequently mutated gene in oral cancers. Since there is synergism between TP53 and c-myc, it seems that co-alteration of these two genes could be also a good marker of OSCC progression from grade1 to grade 2 tumours.
AB  - Uvod: Skvamocelularni karcinomi glave i vrata (HNSCC) uključujući i skvamocelularni karcinom usne duplje (OSCC) ubrajaju se u šest najčešćih tipova humanih maligniteta. Uprkos značajnim napredcima u hirurškom i terapijskom tretmanu, stopa petogodišnjeg preživljavanja kod ovog tipa maligniteta nije značajnije popravljena. Upravo zato, definisanje pouzdanih molekularnih markera progresije kod OSSC predstavlja apsolutni prioritetet. Metode: Amplifikacioni status c-myc, cycD1 i EGFR gena određen je pomoću eseja za detekciju broja genskih kopija, aktivacija H-ras onkogena i inaktivacija TP53 tumor supresora određena je PCR-SSCP mutacionom analizom, a hipermetilacija promotora p16 i MGMT gena je ispitana metil specifičnim PCR-om (MSP). Rezultati: Amplifikacija c-myc onkogena detektovana je kod 56,7%, cycD1 onkogena kod 20%, a EGFR onkogena kod 16,7% analiziranih oralnih skvamocelularnih carcinoma. Istovremeno, mutaciona aktivacija H-ras onkogena detektovana je kod 33,3% ispitanih uzoraka. Amplifikovani c-myc, statistički značajno korelira sa gradusom 2 OSCC. Posebno intrigantan je bio nalaz po kom se onkogene aktivacije u EGFR i H-ras genu međusobno isključuju. Hipermetilacija promotora p16 gena detektovana je kod 30%, a MGMT kod 13,3% analiziranih uzoraka. Ko-alteracije cycDI i p16 gena nisu zapažene ni u jednom od analiziranih uzoraka. Inaktivacija TP53 gena detektovana je kod 56,7% uzoraka i utvrđeno je da statistički značajno korelira sa gradusom 2 i statusom 2 OSCC. Pored ovoga, utvrđeno je da statistički značajan broj uzoraka gradusa 2, sa aktiviranim TP53 genom ima istovremeno aktiviran i c-myc onkogen. Zaključak: TP53, najčešće mutirani gen u oralnim karcinomima, ostaje za sada i najpouzdaniji marker progresije kod OSCC. Obzirom na detektovani sinergizam između TP53 i c-myc gena, možemo reći da su istovremene promene u ova dva gena još pouzdaniji pokazatelj progresije OSSC iz gradusa 1 u gradus 2.
T2  - Journal of Medical Biochemistry
T1  - Simultana alteracija TP53 i c-myc gena - obeležje progresije oralnih karcinoma
T1  - TP53 and c-myc Co-alterations: A hallmark of oral cancer progression
IS  - 4
VL  - 32
SP  - 380
EP  - 388
UR  - https://hdl.handle.net/21.15107/rcub_ibiss_505
ER  - 
@article{
author = "Tanić, Nasta and Milašin, Jelena and Dramićanin, Tatjana and Bošković, Maja and Vukadinović, Miroslav and Milošević, Verica and Tanić, Nikola",
year = "2013, 2013",
abstract = "Background: Head and neck squamous cell carcinoma, including oral cancer, is the sixth most common cancer worldwide. Despite advances in surgery and treatment, the 5-year survival rate has not improved significantly. Therefore, reliable molecular markers for oral cancer progression are badly needed. Methods: We conducted a copy number analysis to estimate amplification status of c-myc, cycD1 and EGFR oncogenes, mutational PCR-SSCP analysis to determine activation of H-ras oncogene and inactivation of TP53 tumour suppressor gene and methylation specific PCR analysis to evaluate hypermethylation of p16 and MGMT genes. Results: c-myc oncogene was amplified in 56.7%, cycDI in 20% and EGFR in 16.7% of Oral Squamous Cell Carcinoma (OSCC) cases while H-ras was activated in 33.3% of samples. Amplification of c-myc was significantly associated with the tumour grade 2. Interestingly, EGFR and H-ras alterations were mutually exclusive. p16 and MGMT were inactivated by hypermethylation in 30% and 13.3% of cases. Co-alteration of cycDI and p16 were not observed in any of the analyzed samples. TP53 was inactivated in 56.7% of samples and was significantly associated with progression of OSCC, grade 2 and stage 2. Moreover, TP53 and c-myc oncogene were simultaneously altered in grade 2 OSCC. Conclusions: The most promising marker of OSCC progression remains the TP53 tumour suppressor, which is the most frequently mutated gene in oral cancers. Since there is synergism between TP53 and c-myc, it seems that co-alteration of these two genes could be also a good marker of OSCC progression from grade1 to grade 2 tumours., Uvod: Skvamocelularni karcinomi glave i vrata (HNSCC) uključujući i skvamocelularni karcinom usne duplje (OSCC) ubrajaju se u šest najčešćih tipova humanih maligniteta. Uprkos značajnim napredcima u hirurškom i terapijskom tretmanu, stopa petogodišnjeg preživljavanja kod ovog tipa maligniteta nije značajnije popravljena. Upravo zato, definisanje pouzdanih molekularnih markera progresije kod OSSC predstavlja apsolutni prioritetet. Metode: Amplifikacioni status c-myc, cycD1 i EGFR gena određen je pomoću eseja za detekciju broja genskih kopija, aktivacija H-ras onkogena i inaktivacija TP53 tumor supresora određena je PCR-SSCP mutacionom analizom, a hipermetilacija promotora p16 i MGMT gena je ispitana metil specifičnim PCR-om (MSP). Rezultati: Amplifikacija c-myc onkogena detektovana je kod 56,7%, cycD1 onkogena kod 20%, a EGFR onkogena kod 16,7% analiziranih oralnih skvamocelularnih carcinoma. Istovremeno, mutaciona aktivacija H-ras onkogena detektovana je kod 33,3% ispitanih uzoraka. Amplifikovani c-myc, statistički značajno korelira sa gradusom 2 OSCC. Posebno intrigantan je bio nalaz po kom se onkogene aktivacije u EGFR i H-ras genu međusobno isključuju. Hipermetilacija promotora p16 gena detektovana je kod 30%, a MGMT kod 13,3% analiziranih uzoraka. Ko-alteracije cycDI i p16 gena nisu zapažene ni u jednom od analiziranih uzoraka. Inaktivacija TP53 gena detektovana je kod 56,7% uzoraka i utvrđeno je da statistički značajno korelira sa gradusom 2 i statusom 2 OSCC. Pored ovoga, utvrđeno je da statistički značajan broj uzoraka gradusa 2, sa aktiviranim TP53 genom ima istovremeno aktiviran i c-myc onkogen. Zaključak: TP53, najčešće mutirani gen u oralnim karcinomima, ostaje za sada i najpouzdaniji marker progresije kod OSCC. Obzirom na detektovani sinergizam između TP53 i c-myc gena, možemo reći da su istovremene promene u ova dva gena još pouzdaniji pokazatelj progresije OSSC iz gradusa 1 u gradus 2.",
journal = "Journal of Medical Biochemistry",
title = "Simultana alteracija TP53 i c-myc gena - obeležje progresije oralnih karcinoma, TP53 and c-myc Co-alterations: A hallmark of oral cancer progression",
number = "4",
volume = "32",
pages = "380-388",
url = "https://hdl.handle.net/21.15107/rcub_ibiss_505"
}
Tanić, N., Milašin, J., Dramićanin, T., Bošković, M., Vukadinović, M., Milošević, V.,& Tanić, N.. (2013). Simultana alteracija TP53 i c-myc gena - obeležje progresije oralnih karcinoma. in Journal of Medical Biochemistry, 32(4), 380-388.
https://hdl.handle.net/21.15107/rcub_ibiss_505
Tanić N, Milašin J, Dramićanin T, Bošković M, Vukadinović M, Milošević V, Tanić N. Simultana alteracija TP53 i c-myc gena - obeležje progresije oralnih karcinoma. in Journal of Medical Biochemistry. 2013;32(4):380-388.
https://hdl.handle.net/21.15107/rcub_ibiss_505 .
Tanić, Nasta, Milašin, Jelena, Dramićanin, Tatjana, Bošković, Maja, Vukadinović, Miroslav, Milošević, Verica, Tanić, Nikola, "Simultana alteracija TP53 i c-myc gena - obeležje progresije oralnih karcinoma" in Journal of Medical Biochemistry, 32, no. 4 (2013):380-388,
https://hdl.handle.net/21.15107/rcub_ibiss_505 .