Mihajlović, Katarina

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  • Mihajlović, Katarina (2)
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Developmental effects of repeated antenatal synthetic glucocorticoid treatment on purinergic signaling in the auditory brainstem

Dimitrijević, Dunja; Boranijašević, Sanja; Lavrnja, Irena; Adžić, Marija; Dragić, Milorad; Stekić, Anđela; Mihajlović, Katarina; Milenković, Ivan; Laketa, Danijela

(Belgrade: Serbian Neuroscience Society, 2023)

TY  - CONF
AU  - Dimitrijević, Dunja
AU  - Boranijašević, Sanja
AU  - Lavrnja, Irena
AU  - Adžić, Marija
AU  - Dragić, Milorad
AU  - Stekić, Anđela
AU  - Mihajlović, Katarina
AU  - Milenković, Ivan
AU  - Laketa, Danijela
PY  - 2023
UR  - http://radar.ibiss.bg.ac.rs/handle/123456789/5983
AB  - In preterm infants, insufficient exposure to endogenous glucocorticoids often leads to fatal complications. Therefore, synthetic glucocorticoids (sGC) are commonly applied to pregnant women at risk of preterm delivery between the 24th and 34th week of gestation. Despite the risk of adverse neurodevelopmental effects, repeat courses are frequently given. In the auditory system, the repeated sGC treatment prolonged neural transmission time and increased auditory thresholds in Wistar rats. Purinergic signaling plays an important role in the development of the auditory system.
We investigated the effects of repeated antenatal treatment with sGC on the components of the purinergic system in the developing auditory brainstem, at postnatal days (PD) 8,14, and 20 (pre-, post-hearing onset, and juvenile stage, respectively). Pregnant C57BL/6 dams received 0.4 mg/kg dexamethasone (DEX) s.c., at gestation days (GD) 15-17 (repeated course - 3DEX), mimicking clinical treatment for three consecutive weeks. In a single treatment (1 DEX), dams received DEX at GD 15, then saline at GD16 and 17. The control group (Sh) received saline. After treatment with 3DEX, a sharp decrease in immunoreactivity for A1 receptors and P2Y1 mRNA expression was observed (in PD8-20 and PD8, respectively). Although treatment effects were not detected for P2X2 receptor, we observed a developmental increase in its mRNA expression. P2X3 receptor, as well as CD73, CD39, and NTPDase2, exhibited stable expression.
In conclusion, repeated antenatal DEX treatment induced changes in A1 and P2Y1 receptors expression in the developing auditory brainstem, suggesting adverse neurodevelopmental effects, urging for evaluation of the current protocols for antenatal sGC treatment.
PB  - Belgrade: Serbian Neuroscience Society
C3  - Book of abstracts: 8th Congress of Serbian neuroscience society with international participation; 2023 May 31 - Jun 2; Belgrade, Serbia
T1  - Developmental effects of repeated antenatal synthetic glucocorticoid treatment on purinergic signaling in the auditory brainstem
SP  - 64
UR  - https://hdl.handle.net/21.15107/rcub_ibiss_5983
ER  - 
@conference{
author = "Dimitrijević, Dunja and Boranijašević, Sanja and Lavrnja, Irena and Adžić, Marija and Dragić, Milorad and Stekić, Anđela and Mihajlović, Katarina and Milenković, Ivan and Laketa, Danijela",
year = "2023",
abstract = "In preterm infants, insufficient exposure to endogenous glucocorticoids often leads to fatal complications. Therefore, synthetic glucocorticoids (sGC) are commonly applied to pregnant women at risk of preterm delivery between the 24th and 34th week of gestation. Despite the risk of adverse neurodevelopmental effects, repeat courses are frequently given. In the auditory system, the repeated sGC treatment prolonged neural transmission time and increased auditory thresholds in Wistar rats. Purinergic signaling plays an important role in the development of the auditory system.
We investigated the effects of repeated antenatal treatment with sGC on the components of the purinergic system in the developing auditory brainstem, at postnatal days (PD) 8,14, and 20 (pre-, post-hearing onset, and juvenile stage, respectively). Pregnant C57BL/6 dams received 0.4 mg/kg dexamethasone (DEX) s.c., at gestation days (GD) 15-17 (repeated course - 3DEX), mimicking clinical treatment for three consecutive weeks. In a single treatment (1 DEX), dams received DEX at GD 15, then saline at GD16 and 17. The control group (Sh) received saline. After treatment with 3DEX, a sharp decrease in immunoreactivity for A1 receptors and P2Y1 mRNA expression was observed (in PD8-20 and PD8, respectively). Although treatment effects were not detected for P2X2 receptor, we observed a developmental increase in its mRNA expression. P2X3 receptor, as well as CD73, CD39, and NTPDase2, exhibited stable expression.
In conclusion, repeated antenatal DEX treatment induced changes in A1 and P2Y1 receptors expression in the developing auditory brainstem, suggesting adverse neurodevelopmental effects, urging for evaluation of the current protocols for antenatal sGC treatment.",
publisher = "Belgrade: Serbian Neuroscience Society",
journal = "Book of abstracts: 8th Congress of Serbian neuroscience society with international participation; 2023 May 31 - Jun 2; Belgrade, Serbia",
title = "Developmental effects of repeated antenatal synthetic glucocorticoid treatment on purinergic signaling in the auditory brainstem",
pages = "64",
url = "https://hdl.handle.net/21.15107/rcub_ibiss_5983"
}
Dimitrijević, D., Boranijašević, S., Lavrnja, I., Adžić, M., Dragić, M., Stekić, A., Mihajlović, K., Milenković, I.,& Laketa, D.. (2023). Developmental effects of repeated antenatal synthetic glucocorticoid treatment on purinergic signaling in the auditory brainstem. in Book of abstracts: 8th Congress of Serbian neuroscience society with international participation; 2023 May 31 - Jun 2; Belgrade, Serbia
Belgrade: Serbian Neuroscience Society., 64.
https://hdl.handle.net/21.15107/rcub_ibiss_5983
Dimitrijević D, Boranijašević S, Lavrnja I, Adžić M, Dragić M, Stekić A, Mihajlović K, Milenković I, Laketa D. Developmental effects of repeated antenatal synthetic glucocorticoid treatment on purinergic signaling in the auditory brainstem. in Book of abstracts: 8th Congress of Serbian neuroscience society with international participation; 2023 May 31 - Jun 2; Belgrade, Serbia. 2023;:64.
https://hdl.handle.net/21.15107/rcub_ibiss_5983 .
Dimitrijević, Dunja, Boranijašević, Sanja, Lavrnja, Irena, Adžić, Marija, Dragić, Milorad, Stekić, Anđela, Mihajlović, Katarina, Milenković, Ivan, Laketa, Danijela, "Developmental effects of repeated antenatal synthetic glucocorticoid treatment on purinergic signaling in the auditory brainstem" in Book of abstracts: 8th Congress of Serbian neuroscience society with international participation; 2023 May 31 - Jun 2; Belgrade, Serbia (2023):64,
https://hdl.handle.net/21.15107/rcub_ibiss_5983 .

Morphometric analysis and redox state of the testicles in nandrolone decanoate and swimming treated adult male rats

Sretenović, Jasmina; Joksimović Jović, Jovana; Srejović, Ivan; Živković, Vladimir; Mihajlović, Katarina; Labudović-Borović, Milica; Trifunović, Svetlana; Milošević, Verica; Lazić, Dejan; Bolevich, Sergey; Jakovljević, Vladimir; Milosavljević, Zoran

(London: BioMed Central Ltd, 2021)

TY  - JOUR
AU  - Sretenović, Jasmina
AU  - Joksimović Jović, Jovana
AU  - Srejović, Ivan
AU  - Živković, Vladimir
AU  - Mihajlović, Katarina
AU  - Labudović-Borović, Milica
AU  - Trifunović, Svetlana
AU  - Milošević, Verica
AU  - Lazić, Dejan
AU  - Bolevich, Sergey
AU  - Jakovljević, Vladimir
AU  - Milosavljević, Zoran
PY  - 2021
UR  - https://bacandrology.biomedcentral.com/articles/10.1186/s12610-021-00134-8
UR  - https://radar.ibiss.bg.ac.rs/handle/123456789/4444
AB  - BACKGROUND During the last decades, the abuse of anabolic androgenic steroids (AASs) has become popular among professional and recreational athletes. The abuse of AASs leads to decreased levels of sex hormones, but the available literature a gives very small pool of data regarding the effects of swimming alone or combined with AASs on testicle tissue. The aim of this study was to investigate the effects of four-week administration of nandrolone decanoate and swimming training alone or in combination on morphometric parameters, androgen receptor (AR) and redox state in testicle tissue. The study included Wistar albino male rats, 10 weeks old, classified into 4 groups: control (T-N-), nandrolone (T-N+), swimming training (T+N-) and swimming training with nandrolone (T+N+). The rats from nandrolone (N+) groups received nandrolone decanoate 20 mg/kg b.w.once per week. The rats from training (T+) groups, swam 1 h/day 5 days/week. The isolated testicles were measured, left testicles were routinely processed for histological analysis, while right testicles were homogenized and prepared for the analysis of the following oxidative stress biomarkers: index of lipid peroxidation (TBARS), nitrites, catalase, superoxide dismutase (SOD), and reduced glutathione (GSH). RESULTS Diameter, as well as cross-section area of seminiferous tubules were decreased by 10 % and 21 % (respectively) in the T-N+ group and by 15% and 41 % (respectively) in the T+N+ group compared to control. Interstitium of the testicles was decreased in all experimental groups. Reduction of immunoreactivity of AR in T-N+ group was 22 %, in T+N+ group was 9 % compared to control. TBARS levels were increased in T+N- and T+N+ groups. Nitrites were decreased in T+N+ group. Catalase activity was increased in all experimental groups. Swimming alone or combined with nandrolone decreased the level of GSH compared to control. SOD activity was decreased in T-N+ and T+N+ groups compared to control. CONCLUSIONS Nandrolone alone or combined with swimming decreased morphometric parameters and amount of AR in testicle tissue. Changes in the redox state indicate reproductive dysfunction. RéSUMé: CONTEXTE: Au cours des dernières décennies, l’abus de stéroïdes androgéniques anabolisants (SAA) est devenu populaire parmi les athlètes professionnels et récréatifs. L’abus des SAA conduit à une diminution des niveaux d’hormones sexuelles, mais la littérature sur les effets de la natation seule ou combinée avec des SAA sur les tissus testiculaires est encore très limité. Le but de cette étude était d’étudier les effets de l’administration de quatre semaines de décanoate de nandrolone et de l’entraînement à la natation seuls ou en combinaison sur les paramètres morphométriques, le récepteur aux androgènes (RA) et l’état redox dans le tissu testiculaire. L’étude a inclus des rats mâles Wistar albinos, âgés de 10 semaines, classés en 4 groupes: contrôle (T-N-), nandrolone (T-N+), entraînement à la natation (T+N-) et entraînement à la natation avec nandrolone (T+N+). Les rats des groupes nandrolone (N+) ont reçu du décanoate de nandrolone 20 mg/kg p.c. une fois par semaine. Les rats des groupes entraînement (T+) nageaient 1 h/jour 5 jours/semaine. Les testicules isolés ont été mesurés, les testicules gauches ont été systématiquement traités pour l’analyse histologique tandis que les testicules droits ont été homogénéisés et préparés pour l’analyse des biomarqueurs de stress oxydatif suivants: indice de peroxydation lipidique (TBARS), nitrites, catalase, superoxyde dismutase (SOD) et glutathion réduit (GSH). RéSULTATS: Le diamètre, ainsi que la section transversale des tubules séminifères ont été réduits de 10 % et 21 % (respectivement) dans le groupe T-N+ et de 15 % et 41 % (respectivement) dans le groupe T+N+ par rapport au groupe témoin. L’interstitium des testicules était diminué dans tous les groupes expérimentaux. La réduction de l’immunoréactivité de RA dans le groupe T-N+ était de 22 %, dans le groupe T+N+ était de 9 % par rapport au groupe témoin. Les niveaux de TBARS ont augmenté dans les groupes T+N- et T+N+. Les nitrites ont diminué dans le groupe T+N+. L’activité de la catalase a été augmentée dans tous les groupes expérimentaux. La natation seule ou combinée à la nandrolone a réduit le niveau de GSH par rapport au contrôle. L’activité de la SOD était diminuée dans les groupes T-N+ et T+N+ par rapport au contrôle. CONCLUSIONS: La nandrolone seule ou combinée à la natation a diminué les paramètres morphométriques et la quantité de RA dans le tissu testiculaire. Les changements de l’état redox indiquent un dysfonctionnement de la reproduction.
PB  - London: BioMed Central Ltd
T2  - Basic and Clinical Andrology
T1  - Morphometric analysis and redox state of the testicles in nandrolone decanoate and swimming treated adult male rats
IS  - 1
VL  - 31
DO  - 10.1186/s12610-021-00134-8
SP  - 17
ER  - 
@article{
author = "Sretenović, Jasmina and Joksimović Jović, Jovana and Srejović, Ivan and Živković, Vladimir and Mihajlović, Katarina and Labudović-Borović, Milica and Trifunović, Svetlana and Milošević, Verica and Lazić, Dejan and Bolevich, Sergey and Jakovljević, Vladimir and Milosavljević, Zoran",
year = "2021",
abstract = "BACKGROUND During the last decades, the abuse of anabolic androgenic steroids (AASs) has become popular among professional and recreational athletes. The abuse of AASs leads to decreased levels of sex hormones, but the available literature a gives very small pool of data regarding the effects of swimming alone or combined with AASs on testicle tissue. The aim of this study was to investigate the effects of four-week administration of nandrolone decanoate and swimming training alone or in combination on morphometric parameters, androgen receptor (AR) and redox state in testicle tissue. The study included Wistar albino male rats, 10 weeks old, classified into 4 groups: control (T-N-), nandrolone (T-N+), swimming training (T+N-) and swimming training with nandrolone (T+N+). The rats from nandrolone (N+) groups received nandrolone decanoate 20 mg/kg b.w.once per week. The rats from training (T+) groups, swam 1 h/day 5 days/week. The isolated testicles were measured, left testicles were routinely processed for histological analysis, while right testicles were homogenized and prepared for the analysis of the following oxidative stress biomarkers: index of lipid peroxidation (TBARS), nitrites, catalase, superoxide dismutase (SOD), and reduced glutathione (GSH). RESULTS Diameter, as well as cross-section area of seminiferous tubules were decreased by 10 % and 21 % (respectively) in the T-N+ group and by 15% and 41 % (respectively) in the T+N+ group compared to control. Interstitium of the testicles was decreased in all experimental groups. Reduction of immunoreactivity of AR in T-N+ group was 22 %, in T+N+ group was 9 % compared to control. TBARS levels were increased in T+N- and T+N+ groups. Nitrites were decreased in T+N+ group. Catalase activity was increased in all experimental groups. Swimming alone or combined with nandrolone decreased the level of GSH compared to control. SOD activity was decreased in T-N+ and T+N+ groups compared to control. CONCLUSIONS Nandrolone alone or combined with swimming decreased morphometric parameters and amount of AR in testicle tissue. Changes in the redox state indicate reproductive dysfunction. RéSUMé: CONTEXTE: Au cours des dernières décennies, l’abus de stéroïdes androgéniques anabolisants (SAA) est devenu populaire parmi les athlètes professionnels et récréatifs. L’abus des SAA conduit à une diminution des niveaux d’hormones sexuelles, mais la littérature sur les effets de la natation seule ou combinée avec des SAA sur les tissus testiculaires est encore très limité. Le but de cette étude était d’étudier les effets de l’administration de quatre semaines de décanoate de nandrolone et de l’entraînement à la natation seuls ou en combinaison sur les paramètres morphométriques, le récepteur aux androgènes (RA) et l’état redox dans le tissu testiculaire. L’étude a inclus des rats mâles Wistar albinos, âgés de 10 semaines, classés en 4 groupes: contrôle (T-N-), nandrolone (T-N+), entraînement à la natation (T+N-) et entraînement à la natation avec nandrolone (T+N+). Les rats des groupes nandrolone (N+) ont reçu du décanoate de nandrolone 20 mg/kg p.c. une fois par semaine. Les rats des groupes entraînement (T+) nageaient 1 h/jour 5 jours/semaine. Les testicules isolés ont été mesurés, les testicules gauches ont été systématiquement traités pour l’analyse histologique tandis que les testicules droits ont été homogénéisés et préparés pour l’analyse des biomarqueurs de stress oxydatif suivants: indice de peroxydation lipidique (TBARS), nitrites, catalase, superoxyde dismutase (SOD) et glutathion réduit (GSH). RéSULTATS: Le diamètre, ainsi que la section transversale des tubules séminifères ont été réduits de 10 % et 21 % (respectivement) dans le groupe T-N+ et de 15 % et 41 % (respectivement) dans le groupe T+N+ par rapport au groupe témoin. L’interstitium des testicules était diminué dans tous les groupes expérimentaux. La réduction de l’immunoréactivité de RA dans le groupe T-N+ était de 22 %, dans le groupe T+N+ était de 9 % par rapport au groupe témoin. Les niveaux de TBARS ont augmenté dans les groupes T+N- et T+N+. Les nitrites ont diminué dans le groupe T+N+. L’activité de la catalase a été augmentée dans tous les groupes expérimentaux. La natation seule ou combinée à la nandrolone a réduit le niveau de GSH par rapport au contrôle. L’activité de la SOD était diminuée dans les groupes T-N+ et T+N+ par rapport au contrôle. CONCLUSIONS: La nandrolone seule ou combinée à la natation a diminué les paramètres morphométriques et la quantité de RA dans le tissu testiculaire. Les changements de l’état redox indiquent un dysfonctionnement de la reproduction.",
publisher = "London: BioMed Central Ltd",
journal = "Basic and Clinical Andrology",
title = "Morphometric analysis and redox state of the testicles in nandrolone decanoate and swimming treated adult male rats",
number = "1",
volume = "31",
doi = "10.1186/s12610-021-00134-8",
pages = "17"
}
Sretenović, J., Joksimović Jović, J., Srejović, I., Živković, V., Mihajlović, K., Labudović-Borović, M., Trifunović, S., Milošević, V., Lazić, D., Bolevich, S., Jakovljević, V.,& Milosavljević, Z.. (2021). Morphometric analysis and redox state of the testicles in nandrolone decanoate and swimming treated adult male rats. in Basic and Clinical Andrology
London: BioMed Central Ltd., 31(1), 17.
https://doi.org/10.1186/s12610-021-00134-8
Sretenović J, Joksimović Jović J, Srejović I, Živković V, Mihajlović K, Labudović-Borović M, Trifunović S, Milošević V, Lazić D, Bolevich S, Jakovljević V, Milosavljević Z. Morphometric analysis and redox state of the testicles in nandrolone decanoate and swimming treated adult male rats. in Basic and Clinical Andrology. 2021;31(1):17.
doi:10.1186/s12610-021-00134-8 .
Sretenović, Jasmina, Joksimović Jović, Jovana, Srejović, Ivan, Živković, Vladimir, Mihajlović, Katarina, Labudović-Borović, Milica, Trifunović, Svetlana, Milošević, Verica, Lazić, Dejan, Bolevich, Sergey, Jakovljević, Vladimir, Milosavljević, Zoran, "Morphometric analysis and redox state of the testicles in nandrolone decanoate and swimming treated adult male rats" in Basic and Clinical Andrology, 31, no. 1 (2021):17,
https://doi.org/10.1186/s12610-021-00134-8 . .
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