Kazimir, Aleksandr

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  • Kazimir, Aleksandr (4)
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Author's Bibliography

Exploring the potential of tamoxifen-based copper(II) dichloride in breast cancer therapy

Kazimir, Aleksandr; Schwarze, Benedikt; Lönnecke, Peter; Jelača, Sanja; Mijatović, Sanja; Maksimović-Ivanić, Danijela; Hey-Hawkins, Evamarie

(Royal Society of Chemistry, 2023)

TY  - JOUR
AU  - Kazimir, Aleksandr
AU  - Schwarze, Benedikt
AU  - Lönnecke, Peter
AU  - Jelača, Sanja
AU  - Mijatović, Sanja
AU  - Maksimović-Ivanić, Danijela
AU  - Hey-Hawkins, Evamarie
PY  - 2023
UR  - http://radar.ibiss.bg.ac.rs/handle/123456789/6266
AB  - For decades, tamoxifen-based hormone therapy has effectively addressed oestrogen receptor positive (ER+) luminal A breast cancer. Nonetheless, the emergence of tamoxifen resistance required innovative
approaches, leading to hybrid metallodrugs with several therapeutic effects besides the inhibition of oestrogen receptor α (ERα). Drawing inspiration from tamoxifen metabolite structures (4-hydroxytamoxifen
and 4,4′-dihyroxytamoxifen), a phenyl ring was replaced by a bidentate 2,2′-bipyridine donor moiety to give
4-[1,1-bis(4-methoxyphenyl)but-1-en-2-yl]-2,2′-bipyridine (L), enabling coordination of bioactive transition
metal compounds such as copper(II) dichloride, yielding [CuCl(μ-Cl)(L-κ2N,N′)]2 (1). Notably, copper(II)
complex 1 exhibited remarkable activity within the low micromolar concentration range against ER+ human glioblastoma U251, as well as breast carcinomas MDA-MB-361 and MCF-7, surpassing the efficacy of previously reported palladium(II) and platinum(II) dichloride analogs against these cell lines. The pronounced efficacy of complex 1 against triple-negative MDA-MB-231 cells highlights its potential multitherapeutic approach, evident through induction of apoptosis and antioxidant activity. This study evaluates the potential of copper–tamoxifen hybrid complex 1 as a potent therapeutic candidate, highlighting its diverse mechanism of action against challenging breast cancer subtypes.
PB  - Royal Society of Chemistry
T2  - RSC Medicinal Chemistry
T1  - Exploring the potential of tamoxifen-based copper(II) dichloride in breast cancer therapy
DO  - 10.1039/d3md00344b
ER  - 
@article{
author = "Kazimir, Aleksandr and Schwarze, Benedikt and Lönnecke, Peter and Jelača, Sanja and Mijatović, Sanja and Maksimović-Ivanić, Danijela and Hey-Hawkins, Evamarie",
year = "2023",
abstract = "For decades, tamoxifen-based hormone therapy has effectively addressed oestrogen receptor positive (ER+) luminal A breast cancer. Nonetheless, the emergence of tamoxifen resistance required innovative
approaches, leading to hybrid metallodrugs with several therapeutic effects besides the inhibition of oestrogen receptor α (ERα). Drawing inspiration from tamoxifen metabolite structures (4-hydroxytamoxifen
and 4,4′-dihyroxytamoxifen), a phenyl ring was replaced by a bidentate 2,2′-bipyridine donor moiety to give
4-[1,1-bis(4-methoxyphenyl)but-1-en-2-yl]-2,2′-bipyridine (L), enabling coordination of bioactive transition
metal compounds such as copper(II) dichloride, yielding [CuCl(μ-Cl)(L-κ2N,N′)]2 (1). Notably, copper(II)
complex 1 exhibited remarkable activity within the low micromolar concentration range against ER+ human glioblastoma U251, as well as breast carcinomas MDA-MB-361 and MCF-7, surpassing the efficacy of previously reported palladium(II) and platinum(II) dichloride analogs against these cell lines. The pronounced efficacy of complex 1 against triple-negative MDA-MB-231 cells highlights its potential multitherapeutic approach, evident through induction of apoptosis and antioxidant activity. This study evaluates the potential of copper–tamoxifen hybrid complex 1 as a potent therapeutic candidate, highlighting its diverse mechanism of action against challenging breast cancer subtypes.",
publisher = "Royal Society of Chemistry",
journal = "RSC Medicinal Chemistry",
title = "Exploring the potential of tamoxifen-based copper(II) dichloride in breast cancer therapy",
doi = "10.1039/d3md00344b"
}
Kazimir, A., Schwarze, B., Lönnecke, P., Jelača, S., Mijatović, S., Maksimović-Ivanić, D.,& Hey-Hawkins, E.. (2023). Exploring the potential of tamoxifen-based copper(II) dichloride in breast cancer therapy. in RSC Medicinal Chemistry
Royal Society of Chemistry..
https://doi.org/10.1039/d3md00344b
Kazimir A, Schwarze B, Lönnecke P, Jelača S, Mijatović S, Maksimović-Ivanić D, Hey-Hawkins E. Exploring the potential of tamoxifen-based copper(II) dichloride in breast cancer therapy. in RSC Medicinal Chemistry. 2023;.
doi:10.1039/d3md00344b .
Kazimir, Aleksandr, Schwarze, Benedikt, Lönnecke, Peter, Jelača, Sanja, Mijatović, Sanja, Maksimović-Ivanić, Danijela, Hey-Hawkins, Evamarie, "Exploring the potential of tamoxifen-based copper(II) dichloride in breast cancer therapy" in RSC Medicinal Chemistry (2023),
https://doi.org/10.1039/d3md00344b . .
2
2

Tамоксифен као вектор за платинске(II) и паладијумске(II) комплексе у третману рака дојке

Murganić, Blagoje; Kazimir, Aleksandr; Jelača, Sanja; Tanić, Nikola; Tanić, Nasta; Hey-Hawkins, Evamarie; Mijatović, Sanja; Maksimović-Ivanić, Danijela

(Kragujevac: Serbian Society for Immunology, Molecular Oncology and Regenerative Medicine, 2023)

TY  - CONF
AU  - Murganić, Blagoje
AU  - Kazimir, Aleksandr
AU  - Jelača, Sanja
AU  - Tanić, Nikola
AU  - Tanić, Nasta
AU  - Hey-Hawkins, Evamarie
AU  - Mijatović, Sanja
AU  - Maksimović-Ivanić, Danijela
PY  - 2023
UR  - http://radar.ibiss.bg.ac.rs/handle/123456789/6261
AB  - Рак дојке је најчешћи облик рака код жена са приближно 70% случајева који су
позитивни на хормонске рецепторе (HR+). Прекомерна експресија естрогенског
рецептора (ER) је уско повезана са пролиферацијом тумора. Антиестрогенске те-
рапије, нпр. са тамоксифеном, су уобичајени и ефикасни приступи у лечењу ЕR+
рака дојке. Иако терапија тамоксифеном спада у групу циљаних терапија, његова
ефикасност је доказана и код хормон-независних типова карцинома дојке, што
указује на присуство других интрацелуларних циљних молекула. Иако је тамок-
сифен показао значајну ефикасност у лечењу ER-позитивних карцинома дојке,
бројни пацијенти су развили резистенцију. У циљу повећања његовог потенци-
јала и превазилажења резистенције, тамоксифен је модификован металима као
што су платина (Pt) и паладијум (Pd). Једињења заснована на Pt традиционално
се користе у хемиотерапији, док комплекси Pd могу смањити токсичност и бити
ефикаснији против одређених врста рака. Циљ ове студије био је да се процени
ефикасност тамоксифена модификованог са Pt и Pd на панелу ћелијских линија
рака дојке са различитим статусом експресије рецептора. Дериват тамоксифена
који се користи као лиганд, смањио је вијабилност туморских ћелија независно
од експресије ER, што указује да се његово антитуморско дејство може превас-
ходно приписати ER-независном деловању. Експериментални лекови су изазвали
апоптозу независну од каспаза, са израженијим ефектом у случају деривата на
бази Pd. Ефикасност деривата Pd може се додатно повећати укидањем процеса
аутофагије. Узето заједно, дериватизација тамоксифена је обећавајућа стратегија
у дизајну хибридних молекула.
AB  - Breast cancer is the most prevalent form of cancer in women, with approximately
70% of cases being hormone receptor positive (HR+). While overexpression of estrogen
receptor (ER) is closely related with tumor proliferation, anti-estrogen therapies,
e.g., with tamoxifen, are common and effective approaches. Although treatment with
tamoxifen belongs to the group of targeted therapies, its effectiveness has also been
proven in hormone-independent types of breast cancer, which indicates the presence
of intracellular off-targets. Apart of the fact that tamoxifen showed significant
efficiency in the treatment of ER+ breast cancers, numerous patients developed resistance
towards it. With an aim to amplify its potential and overcome resistance, tamoxifen
has been modified with transition metals such as platinum (Pt) and palladium
(Pd). Pt-based compounds have traditionally been used in cancer chemotherapy,
while Pd complexes may lower the toxicity and be more effective against certain types
of cancer. The aim of this study was to evaluate the efficacy of tamoxifen modified
with Pt and Pd on a panel of breast cancer cell lines with different receptor expression
status. The tamoxifen derivative used as ligand diminished the viability of tumor cells
independently of ER expression, indicating that its antitumor action can be dominantly
ascribed to a ER-independent action. The experimental drugs induced caspase
independent apoptosis, with a more pronounced effect in the case of the Pd-based
derivatives. The efficacy of the Pd derivate can be further increased by abolishment
of the autophagic process. Taken together, derivatization of tamoxifen is a promising
strategy for hybrid molecule design.
PB  - Kragujevac: Serbian Society for Immunology, Molecular Oncology and Regenerative Medicine
C3  - Abstract Book: The second Serbian Molecular Medicine Congress; 2023 Oct 6-8; Foča, Bosnia and Herzegovina
T1  - Tамоксифен као вектор за платинске(II) и паладијумске(II) комплексе у третману рака дојке
T1  - Tamoxifen as a vector for platinum(II) and palladium(II) complexes in breast cancer treatment
SP  - 18
EP  - 19
UR  - https://hdl.handle.net/21.15107/rcub_ibiss_6261
ER  - 
@conference{
author = "Murganić, Blagoje and Kazimir, Aleksandr and Jelača, Sanja and Tanić, Nikola and Tanić, Nasta and Hey-Hawkins, Evamarie and Mijatović, Sanja and Maksimović-Ivanić, Danijela",
year = "2023",
abstract = "Рак дојке је најчешћи облик рака код жена са приближно 70% случајева који су
позитивни на хормонске рецепторе (HR+). Прекомерна експресија естрогенског
рецептора (ER) је уско повезана са пролиферацијом тумора. Антиестрогенске те-
рапије, нпр. са тамоксифеном, су уобичајени и ефикасни приступи у лечењу ЕR+
рака дојке. Иако терапија тамоксифеном спада у групу циљаних терапија, његова
ефикасност је доказана и код хормон-независних типова карцинома дојке, што
указује на присуство других интрацелуларних циљних молекула. Иако је тамок-
сифен показао значајну ефикасност у лечењу ER-позитивних карцинома дојке,
бројни пацијенти су развили резистенцију. У циљу повећања његовог потенци-
јала и превазилажења резистенције, тамоксифен је модификован металима као
што су платина (Pt) и паладијум (Pd). Једињења заснована на Pt традиционално
се користе у хемиотерапији, док комплекси Pd могу смањити токсичност и бити
ефикаснији против одређених врста рака. Циљ ове студије био је да се процени
ефикасност тамоксифена модификованог са Pt и Pd на панелу ћелијских линија
рака дојке са различитим статусом експресије рецептора. Дериват тамоксифена
који се користи као лиганд, смањио је вијабилност туморских ћелија независно
од експресије ER, што указује да се његово антитуморско дејство може превас-
ходно приписати ER-независном деловању. Експериментални лекови су изазвали
апоптозу независну од каспаза, са израженијим ефектом у случају деривата на
бази Pd. Ефикасност деривата Pd може се додатно повећати укидањем процеса
аутофагије. Узето заједно, дериватизација тамоксифена је обећавајућа стратегија
у дизајну хибридних молекула., Breast cancer is the most prevalent form of cancer in women, with approximately
70% of cases being hormone receptor positive (HR+). While overexpression of estrogen
receptor (ER) is closely related with tumor proliferation, anti-estrogen therapies,
e.g., with tamoxifen, are common and effective approaches. Although treatment with
tamoxifen belongs to the group of targeted therapies, its effectiveness has also been
proven in hormone-independent types of breast cancer, which indicates the presence
of intracellular off-targets. Apart of the fact that tamoxifen showed significant
efficiency in the treatment of ER+ breast cancers, numerous patients developed resistance
towards it. With an aim to amplify its potential and overcome resistance, tamoxifen
has been modified with transition metals such as platinum (Pt) and palladium
(Pd). Pt-based compounds have traditionally been used in cancer chemotherapy,
while Pd complexes may lower the toxicity and be more effective against certain types
of cancer. The aim of this study was to evaluate the efficacy of tamoxifen modified
with Pt and Pd on a panel of breast cancer cell lines with different receptor expression
status. The tamoxifen derivative used as ligand diminished the viability of tumor cells
independently of ER expression, indicating that its antitumor action can be dominantly
ascribed to a ER-independent action. The experimental drugs induced caspase
independent apoptosis, with a more pronounced effect in the case of the Pd-based
derivatives. The efficacy of the Pd derivate can be further increased by abolishment
of the autophagic process. Taken together, derivatization of tamoxifen is a promising
strategy for hybrid molecule design.",
publisher = "Kragujevac: Serbian Society for Immunology, Molecular Oncology and Regenerative Medicine",
journal = "Abstract Book: The second Serbian Molecular Medicine Congress; 2023 Oct 6-8; Foča, Bosnia and Herzegovina",
title = "Tамоксифен као вектор за платинске(II) и паладијумске(II) комплексе у третману рака дојке, Tamoxifen as a vector for platinum(II) and palladium(II) complexes in breast cancer treatment",
pages = "18-19",
url = "https://hdl.handle.net/21.15107/rcub_ibiss_6261"
}
Murganić, B., Kazimir, A., Jelača, S., Tanić, N., Tanić, N., Hey-Hawkins, E., Mijatović, S.,& Maksimović-Ivanić, D.. (2023). Tамоксифен као вектор за платинске(II) и паладијумске(II) комплексе у третману рака дојке. in Abstract Book: The second Serbian Molecular Medicine Congress; 2023 Oct 6-8; Foča, Bosnia and Herzegovina
Kragujevac: Serbian Society for Immunology, Molecular Oncology and Regenerative Medicine., 18-19.
https://hdl.handle.net/21.15107/rcub_ibiss_6261
Murganić B, Kazimir A, Jelača S, Tanić N, Tanić N, Hey-Hawkins E, Mijatović S, Maksimović-Ivanić D. Tамоксифен као вектор за платинске(II) и паладијумске(II) комплексе у третману рака дојке. in Abstract Book: The second Serbian Molecular Medicine Congress; 2023 Oct 6-8; Foča, Bosnia and Herzegovina. 2023;:18-19.
https://hdl.handle.net/21.15107/rcub_ibiss_6261 .
Murganić, Blagoje, Kazimir, Aleksandr, Jelača, Sanja, Tanić, Nikola, Tanić, Nasta, Hey-Hawkins, Evamarie, Mijatović, Sanja, Maksimović-Ivanić, Danijela, "Tамоксифен као вектор за платинске(II) и паладијумске(II) комплексе у третману рака дојке" in Abstract Book: The second Serbian Molecular Medicine Congress; 2023 Oct 6-8; Foča, Bosnia and Herzegovina (2023):18-19,
https://hdl.handle.net/21.15107/rcub_ibiss_6261 .

Metallodrugs against Breast Cancer: Combining the Tamoxifen Vector with Platinum(II) and Palladium(II) Complexes

Kazimir, Aleksandr; Schwarze, Benedikt; Lönnecke, Peter; Jelača, Sanja; Mijatović, Sanja; Maksimović-Ivanić, Danijela; Hey-Hawkins, Evamarie

(Basel: MDPI, 2023)

TY  - JOUR
AU  - Kazimir, Aleksandr
AU  - Schwarze, Benedikt
AU  - Lönnecke, Peter
AU  - Jelača, Sanja
AU  - Mijatović, Sanja
AU  - Maksimović-Ivanić, Danijela
AU  - Hey-Hawkins, Evamarie
PY  - 2023
UR  - http://radar.ibiss.bg.ac.rs/handle/123456789/5469
AB  - The luminal A-subtype of breast cancer, where the oestrogen receptor α (ERα) is overexpressed, is the most frequent one. The prodrug tamoxifen (1) is the clinically used agent, inhibiting the ERα activity via the formation of several active metabolites, such as 4-hydroxytamoxifen (2) or 4,4′-dihydroxytamoxifen (3). In this study, we present the tamoxifen derivative 4-[1,1-bis(4-methoxyphenyl)but-1-en-2-yl]-2,2′-bipyridine (4), which was combined with platinum or palladium dichloride, the former a well-known scaffold in anticancer treatment, to give [PtCl2(4-κ2N,N′)] (5) or [PdCl2(4-κ2N,N′] (6). To prevent fast exchange of weakly coordinating chlorido ligands in aqueous solution, a bulky, highly stable and hydrophobic nido-carborate(−2) ([C2B9H11]2−) was incorporated. The resulting complexes [3-(4-κ2N,N′)-3,1,2-PtC2B9H11] (7) and [3-(4-κ2N,N′)-3,1,2-PdC2B9H11] (8) exhibit a dramatic change in electronic and biological properties compared to 5 and 6. Thus, 8 is highly selective for triple-negative MDA-MB-231 cells (IC50 = 3.7 μM, MTT test), while 7 is completely inactive against this cell line. The observed cytotoxicity of compounds 4–6 and 8 against this triple-negative cell line suggests off-target mechanisms rather than only ERα inhibition, for which these compounds were originally designed. Spectroscopic properties and electronic structures of the metal complexes were investigated for possible explanations of the biological activities.
PB  - Basel: MDPI
T2  - Pharmaceutics
T1  - Metallodrugs against Breast Cancer: Combining the Tamoxifen Vector with Platinum(II) and Palladium(II) Complexes
IS  - 2
VL  - 15
DO  - 10.3390/pharmaceutics15020682
SP  - 682
ER  - 
@article{
author = "Kazimir, Aleksandr and Schwarze, Benedikt and Lönnecke, Peter and Jelača, Sanja and Mijatović, Sanja and Maksimović-Ivanić, Danijela and Hey-Hawkins, Evamarie",
year = "2023",
abstract = "The luminal A-subtype of breast cancer, where the oestrogen receptor α (ERα) is overexpressed, is the most frequent one. The prodrug tamoxifen (1) is the clinically used agent, inhibiting the ERα activity via the formation of several active metabolites, such as 4-hydroxytamoxifen (2) or 4,4′-dihydroxytamoxifen (3). In this study, we present the tamoxifen derivative 4-[1,1-bis(4-methoxyphenyl)but-1-en-2-yl]-2,2′-bipyridine (4), which was combined with platinum or palladium dichloride, the former a well-known scaffold in anticancer treatment, to give [PtCl2(4-κ2N,N′)] (5) or [PdCl2(4-κ2N,N′] (6). To prevent fast exchange of weakly coordinating chlorido ligands in aqueous solution, a bulky, highly stable and hydrophobic nido-carborate(−2) ([C2B9H11]2−) was incorporated. The resulting complexes [3-(4-κ2N,N′)-3,1,2-PtC2B9H11] (7) and [3-(4-κ2N,N′)-3,1,2-PdC2B9H11] (8) exhibit a dramatic change in electronic and biological properties compared to 5 and 6. Thus, 8 is highly selective for triple-negative MDA-MB-231 cells (IC50 = 3.7 μM, MTT test), while 7 is completely inactive against this cell line. The observed cytotoxicity of compounds 4–6 and 8 against this triple-negative cell line suggests off-target mechanisms rather than only ERα inhibition, for which these compounds were originally designed. Spectroscopic properties and electronic structures of the metal complexes were investigated for possible explanations of the biological activities.",
publisher = "Basel: MDPI",
journal = "Pharmaceutics",
title = "Metallodrugs against Breast Cancer: Combining the Tamoxifen Vector with Platinum(II) and Palladium(II) Complexes",
number = "2",
volume = "15",
doi = "10.3390/pharmaceutics15020682",
pages = "682"
}
Kazimir, A., Schwarze, B., Lönnecke, P., Jelača, S., Mijatović, S., Maksimović-Ivanić, D.,& Hey-Hawkins, E.. (2023). Metallodrugs against Breast Cancer: Combining the Tamoxifen Vector with Platinum(II) and Palladium(II) Complexes. in Pharmaceutics
Basel: MDPI., 15(2), 682.
https://doi.org/10.3390/pharmaceutics15020682
Kazimir A, Schwarze B, Lönnecke P, Jelača S, Mijatović S, Maksimović-Ivanić D, Hey-Hawkins E. Metallodrugs against Breast Cancer: Combining the Tamoxifen Vector with Platinum(II) and Palladium(II) Complexes. in Pharmaceutics. 2023;15(2):682.
doi:10.3390/pharmaceutics15020682 .
Kazimir, Aleksandr, Schwarze, Benedikt, Lönnecke, Peter, Jelača, Sanja, Mijatović, Sanja, Maksimović-Ivanić, Danijela, Hey-Hawkins, Evamarie, "Metallodrugs against Breast Cancer: Combining the Tamoxifen Vector with Platinum(II) and Palladium(II) Complexes" in Pharmaceutics, 15, no. 2 (2023):682,
https://doi.org/10.3390/pharmaceutics15020682 . .
1
6

Tamoxifen-based compounds in the breast cancer therapy

Kazimir, Aleksandr; Schwarze, Benedikt; Jelača, Sanja; Mijatović, Sanja; Maksimović-Ivanić, Danijela; Hey-Hawkins, Evamarie

(Society of Biological Inorganic Chemistry, 2022)

TY  - CONF
AU  - Kazimir, Aleksandr
AU  - Schwarze, Benedikt
AU  - Jelača, Sanja
AU  - Mijatović, Sanja
AU  - Maksimović-Ivanić, Danijela
AU  - Hey-Hawkins, Evamarie
PY  - 2022
UR  - https://eurobic16.sciencesconf.org/
UR  - http://radar.ibiss.bg.ac.rs/handle/123456789/5318
AB  - Tamoxifen (Scheme 1, 1) is historically well known for its successful application in the therapy of
the oestrogen receptor positive (ERα+) breast cancer.1
In this study, we combine a tamoxifenbased ligand2
(Scheme 1, 3) with transition metal complex moieties of platinum(II), palladium(II),
copper(II), and nickel(II)3
containing chlorides (Scheme 1, 4-6) or a bulky, hydrophobic and stable
nido-dicarborate ligand (Scheme 1, 7-9). We investigated the anticancer activity of the
compounds 2-9 in in vitro cell assays. The incorporation of a 2,2’-bipyridine unit into a tamoxifen-inspired structure 3 increases the
cytotoxic activity compared to compound 2 against several cell lines including ERα+ human
glioblastoma (U251), breast adenocarcinoma (MCF-7, MDA-MB-361) and triple negative (ERα−)
MDA-MB-231. The formation of PtII and PdII chloride complexes (4 and 5) insignificantly improve
the activity compared to ligand 3. The ability of the CuII chloride moiety for ligand exchange in
solution explains the significant rise of the cytotoxicity of 6 compared to 4 and 5. However, the
incorporation of a nido-carborate dianion into Pt and Ni complexes (7 and 9) neutralised on
average their toxicity towards all studied cell lines, except compound 8 which was active against
U251 and MDA-MB-231. The observed cytotoxicity data of compounds 3-6 and 8 against MDAMB-231 (ERα−) suggest other off-target mechanisms rather than only ERα inhibition which is
usual for metallodrugs.
PB  - Society of Biological Inorganic Chemistry
C3  - 16th European Biological Inorganic Chemistry Conference: EuroBIC-16; 2022 Jul 17-21; Grenoble, France
T1  - Tamoxifen-based compounds in the breast cancer therapy
SP  - BI31
UR  - https://hdl.handle.net/21.15107/rcub_ibiss_5318
ER  - 
@conference{
author = "Kazimir, Aleksandr and Schwarze, Benedikt and Jelača, Sanja and Mijatović, Sanja and Maksimović-Ivanić, Danijela and Hey-Hawkins, Evamarie",
year = "2022",
abstract = "Tamoxifen (Scheme 1, 1) is historically well known for its successful application in the therapy of
the oestrogen receptor positive (ERα+) breast cancer.1
In this study, we combine a tamoxifenbased ligand2
(Scheme 1, 3) with transition metal complex moieties of platinum(II), palladium(II),
copper(II), and nickel(II)3
containing chlorides (Scheme 1, 4-6) or a bulky, hydrophobic and stable
nido-dicarborate ligand (Scheme 1, 7-9). We investigated the anticancer activity of the
compounds 2-9 in in vitro cell assays. The incorporation of a 2,2’-bipyridine unit into a tamoxifen-inspired structure 3 increases the
cytotoxic activity compared to compound 2 against several cell lines including ERα+ human
glioblastoma (U251), breast adenocarcinoma (MCF-7, MDA-MB-361) and triple negative (ERα−)
MDA-MB-231. The formation of PtII and PdII chloride complexes (4 and 5) insignificantly improve
the activity compared to ligand 3. The ability of the CuII chloride moiety for ligand exchange in
solution explains the significant rise of the cytotoxicity of 6 compared to 4 and 5. However, the
incorporation of a nido-carborate dianion into Pt and Ni complexes (7 and 9) neutralised on
average their toxicity towards all studied cell lines, except compound 8 which was active against
U251 and MDA-MB-231. The observed cytotoxicity data of compounds 3-6 and 8 against MDAMB-231 (ERα−) suggest other off-target mechanisms rather than only ERα inhibition which is
usual for metallodrugs.",
publisher = "Society of Biological Inorganic Chemistry",
journal = "16th European Biological Inorganic Chemistry Conference: EuroBIC-16; 2022 Jul 17-21; Grenoble, France",
title = "Tamoxifen-based compounds in the breast cancer therapy",
pages = "BI31",
url = "https://hdl.handle.net/21.15107/rcub_ibiss_5318"
}
Kazimir, A., Schwarze, B., Jelača, S., Mijatović, S., Maksimović-Ivanić, D.,& Hey-Hawkins, E.. (2022). Tamoxifen-based compounds in the breast cancer therapy. in 16th European Biological Inorganic Chemistry Conference: EuroBIC-16; 2022 Jul 17-21; Grenoble, France
Society of Biological Inorganic Chemistry., BI31.
https://hdl.handle.net/21.15107/rcub_ibiss_5318
Kazimir A, Schwarze B, Jelača S, Mijatović S, Maksimović-Ivanić D, Hey-Hawkins E. Tamoxifen-based compounds in the breast cancer therapy. in 16th European Biological Inorganic Chemistry Conference: EuroBIC-16; 2022 Jul 17-21; Grenoble, France. 2022;:BI31.
https://hdl.handle.net/21.15107/rcub_ibiss_5318 .
Kazimir, Aleksandr, Schwarze, Benedikt, Jelača, Sanja, Mijatović, Sanja, Maksimović-Ivanić, Danijela, Hey-Hawkins, Evamarie, "Tamoxifen-based compounds in the breast cancer therapy" in 16th European Biological Inorganic Chemistry Conference: EuroBIC-16; 2022 Jul 17-21; Grenoble, France (2022):BI31,
https://hdl.handle.net/21.15107/rcub_ibiss_5318 .