TY  - JOUR
AU  - Filipović, Branko
AU  - Šošić-Jurjević, Branka 
AU  - Ajdžanović, Vladimir
AU  - Živanović, Jasmina
AU  - Manojlović-Stojanoski, Milica
AU  - Nestorović, Nataša
AU  - Ristić, Nataša
AU  - Trifunović, Svetlana
AU  - Milošević, Verica
PY  - 2018
UR  - http://doi.wiley.com/10.1111/joa.12828
UR  - https://radar.ibiss.bg.ac.rs/handle/123456789/3079
AB  - As a major phytoestrogen of soy, genistein effectively prevents bone loss in both humans and rat models of osteoporosis. However, although the bone-sparing effects of genistein are achieved directly through estrogen receptors, its mode of action on bone by modulation of other endocrine functions is not entirely clear. Thus, thyroid hormones and calcitonin (CT) have an essential influence on bone metabolism. Besides its action on bones, in this study we examined the effect of genistein on the activity of two different endocrine cell populations, thyroid follicular and C-cells. Fifteen-month-old Wistar rats were either bilaterally orchidectomized (Orx) or sham-operated (SO). Two weeks after surgery, half of the Orx rats were treated chronically with 30 mg kg-1 b.w. genistein (Orx + G) subcutaneously (s.c.) every day for 3 weeks, while the remaining Orx rats and the SO rats were given the same volume of sterile olive oil to serve as controls. For histomorphometrical analysis of the trabecular bone microarchitecture an ImageJ public domain image processing programme was used. Thyroid sections were analysed histologically and stereologically after visualization of follicular and C-cells by immunohistochemical staining for thyroglobulin and CT. Thyroid follicular epithelium, interstitium, colloid and CT-immunopositive C-cells were examined morphometrically. Serum concentrations of osteocalcin (OC), triiodothyronine (T3 ), thyroxine (T4 ) and CT were determined as well as urinary calcium (Ca2+ ) concentrations. Genistein treatment significantly increased cancellous bone area (B.Ar), trabecular thickness (TbTh) and trabecular number (TbN) (P < 0.05), but trabecular separation (Tb.Sp) was decreased (P < 0.05) compared with control Orx rats. In the thyroid, genistein treatment significantly elevated the relative volume density (Vv) of the follicular cells (P < 0.05) compared with Orx, whereas Vv of the colloid was lower (P < 0.05) than in the Orx. Evaluation of the biochemical parameters showed significant reductions in serum OC, T3 , T4 and urinary Ca2+ concentrations (P < 0.05), compared with Orx rats. These data indicate that genistein treatment improves the trabecular microarchitecture of proximal tibia, induces histomorphometrical changes in thyroid glands, and decreases circulating thyroid hormone levels in orchidectomized rat model of male osteoporosis.
T2  - Journal of Anatomy
T2  - Journal of Anatomy
T1  - The phytoestrogen genistein prevents trabecular bone loss and affects thyroid follicular cells in a male rat model of osteoporosis.
IS  - 2
VL  - 233
DO  - 10.1111/joa.12828
SP  - 204
EP  - 212
ER  - 

@article{
author = "Filipović, Branko and Šošić-Jurjević, Branka  and Ajdžanović, Vladimir and Živanović, Jasmina and Manojlović-Stojanoski, Milica and Nestorović, Nataša and Ristić, Nataša and Trifunović, Svetlana and Milošević, Verica",
year = "2018",
abstract = "As a major phytoestrogen of soy, genistein effectively prevents bone loss in both humans and rat models of osteoporosis. However, although the bone-sparing effects of genistein are achieved directly through estrogen receptors, its mode of action on bone by modulation of other endocrine functions is not entirely clear. Thus, thyroid hormones and calcitonin (CT) have an essential influence on bone metabolism. Besides its action on bones, in this study we examined the effect of genistein on the activity of two different endocrine cell populations, thyroid follicular and C-cells. Fifteen-month-old Wistar rats were either bilaterally orchidectomized (Orx) or sham-operated (SO). Two weeks after surgery, half of the Orx rats were treated chronically with 30 mg kg-1 b.w. genistein (Orx + G) subcutaneously (s.c.) every day for 3 weeks, while the remaining Orx rats and the SO rats were given the same volume of sterile olive oil to serve as controls. For histomorphometrical analysis of the trabecular bone microarchitecture an ImageJ public domain image processing programme was used. Thyroid sections were analysed histologically and stereologically after visualization of follicular and C-cells by immunohistochemical staining for thyroglobulin and CT. Thyroid follicular epithelium, interstitium, colloid and CT-immunopositive C-cells were examined morphometrically. Serum concentrations of osteocalcin (OC), triiodothyronine (T3 ), thyroxine (T4 ) and CT were determined as well as urinary calcium (Ca2+ ) concentrations. Genistein treatment significantly increased cancellous bone area (B.Ar), trabecular thickness (TbTh) and trabecular number (TbN) (P < 0.05), but trabecular separation (Tb.Sp) was decreased (P < 0.05) compared with control Orx rats. In the thyroid, genistein treatment significantly elevated the relative volume density (Vv) of the follicular cells (P < 0.05) compared with Orx, whereas Vv of the colloid was lower (P < 0.05) than in the Orx. Evaluation of the biochemical parameters showed significant reductions in serum OC, T3 , T4 and urinary Ca2+ concentrations (P < 0.05), compared with Orx rats. These data indicate that genistein treatment improves the trabecular microarchitecture of proximal tibia, induces histomorphometrical changes in thyroid glands, and decreases circulating thyroid hormone levels in orchidectomized rat model of male osteoporosis.",
journal = "Journal of Anatomy, Journal of Anatomy",
title = "The phytoestrogen genistein prevents trabecular bone loss and affects thyroid follicular cells in a male rat model of osteoporosis.",
number = "2",
volume = "233",
doi = "10.1111/joa.12828",
pages = "204-212"
}

Filipović, B., Šošić-Jurjević, B., Ajdžanović, V., Živanović, J., Manojlović-Stojanoski, M., Nestorović, N., Ristić, N., Trifunović, S.,& Milošević, V.. (2018). The phytoestrogen genistein prevents trabecular bone loss and affects thyroid follicular cells in a male rat model of osteoporosis.. in Journal of Anatomy, 233(2), 204-212.
https://doi.org/10.1111/joa.12828

Filipović B, Šošić-Jurjević B, Ajdžanović V, Živanović J, Manojlović-Stojanoski M, Nestorović N, Ristić N, Trifunović S, Milošević V. The phytoestrogen genistein prevents trabecular bone loss and affects thyroid follicular cells in a male rat model of osteoporosis.. in Journal of Anatomy. 2018;233(2):204-212.
doi:10.1111/joa.12828 .

Filipović, Branko, Šošić-Jurjević, Branka , Ajdžanović, Vladimir, Živanović, Jasmina, Manojlović-Stojanoski, Milica, Nestorović, Nataša, Ristić, Nataša, Trifunović, Svetlana, Milošević, Verica, "The phytoestrogen genistein prevents trabecular bone loss and affects thyroid follicular cells in a male rat model of osteoporosis." in Journal of Anatomy, 233, no. 2 (2018):204-212,
https://doi.org/10.1111/joa.12828 . .