DIET-INDUCED OBESITY AND GHRELIN EFFECTS ON PITUITARY GONADOTROPHS: IMMUNOHISTOMORPHOMETRIC STUDY IN MALE RATS

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NATASA RISTIC; DARKO STEVANOVIC; DEJAN NESIC; VLADIMIR AJDZANOVIC; RASTKO RAKOCEVIC; IVANA JARIC; VERICA MILOSEVIC

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Journal: Cell Journal (Yakhteh) Year:2016 | Volume:17 | Issue:4 Page(s): 711-719

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Title

DIET-INDUCED OBESITY AND GHRELIN EFFECTS ON PITUITARY GONADOTROPHS: IMMUNOHISTOMORPHOMETRIC STUDY IN MALE RATS

Author(s)

Keywords

OBESITY

GHRELIN

GONADOTROPHS

MALE

RATS

Abstract

Objective: The close relationship between energy metabolism, nutritional state, and reproductive physiology suggests that nutritional and metabolic disorders can disrupt normal reproductive function and fertility. Considering the importance of leptin and GHRELIN effects in regulation of the hypothalamic-pituitary-gonadal axis, the objective of this study was to investigate the influence of OBESITY and centrally applied GHRELIN on immunohistochemical appearance and quantitative morphology of the pituitary follicle-stimulating hormone (FSH) and luteinizing hormone (LH) producing cells in adult MALE RATS.Materials and Methods: In this experimental study, animals were given two different diets: normal-fat (NF) and high-fat (HF), for 4 weeks, corresponding to normal and positive energy balance (n=2×14), respectively. Each group was subsequently divided into two subgroups (n=7) receiving intracerebroventricular (ICV) injections of either GHRELIN [G, 1 mg/5 mL phosphate buffered saline (PBS)] or vehicle (5 mL PBS, control group) every 24 hours for five consecutive days.Results: Morphometric analyses showed that in HF control group, the percentage of FSH cells per unit volume of total pituitary gland tissue (in mm3), i.e. volume density (Vvc), was increased (P<0.05) by 9.1% in comparison with the NF controls. After ICV treatment with GHRELIN, volume (Vc) and volume density (Vvc) of FSH cells in GHRELIN+NF (GNF) and GHRELIN+HF (GHF) groups remained unchanged in comparison with NF and HF controls. Volume of LH cells in HF control group was increased by 17% (P<0.05), but their Vvc was decreased by 8.3% (P<0.05) in comparison with NF controls. In GNF group, the volume of LH cells increased by 7% (P<0.05), in comparison with the NF controls, but in GHF group, the same parameter remained unchanged when compared with HF controls. The central application of GHRELIN decreased the Vvc of LH cells only in GNF group by 38.9% (P<0.05) in comparison with the NF control animals.Conclusion: The present study has shown that OBESITY and repetitive ICV administration of low doses of GHRELIN, in NF and HF RATS, modulated the immunohistomorphometric features of GONADOTROPHS, indicating the importance of OBESITY and GHRELIN in regulation of the reproductive function.

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APA: Copy

NATASA, RISTIC, DARKO, STEVANOVIC, DEJAN, NESIC, VLADIMIR, AJDZANOVIC, RASTKO, RAKOCEVIC, IVANA, JARIC, & VERICA, MILOSEVIC. (2016). DIET-INDUCED OBESITY AND GHRELIN EFFECTS ON PITUITARY GONADOTROPHS: IMMUNOHISTOMORPHOMETRIC STUDY IN MALE RATS. CELL JOURNAL (YAKHTEH), 17(4), 711-719. SID. https://sid.ir/paper/669042/en

Vancouver: Copy

NATASA RISTIC, DARKO STEVANOVIC, DEJAN NESIC, VLADIMIR AJDZANOVIC, RASTKO RAKOCEVIC, IVANA JARIC, VERICA MILOSEVIC. DIET-INDUCED OBESITY AND GHRELIN EFFECTS ON PITUITARY GONADOTROPHS: IMMUNOHISTOMORPHOMETRIC STUDY IN MALE RATS. CELL JOURNAL (YAKHTEH)[Internet]. 2016;17(4):711-719. Available from: https://sid.ir/paper/669042/en

IEEE: Copy

RISTIC NATASA, STEVANOVIC DARKO, NESIC DEJAN, AJDZANOVIC VLADIMIR, RAKOCEVIC RASTKO, JARIC IVANA, and MILOSEVIC VERICA, “DIET-INDUCED OBESITY AND GHRELIN EFFECTS ON PITUITARY GONADOTROPHS: IMMUNOHISTOMORPHOMETRIC STUDY IN MALE RATS,” CELL JOURNAL (YAKHTEH), vol. 17, no. 4, pp. 711–719, 2016, [Online]. Available: https://sid.ir/paper/669042/en

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