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Trace glucose and lipid metabolism in high androgen and high-fat diet induced polycystic ovary syndrome rats.

Zhai HL, Wu H, Xu H, Weng P, Xia FZ, Chen Y, Lu YL - Reprod. Biol. Endocrinol. (2012)

Bottom Line: Ra of glucose and GNG increased significantly in the andronate+HFD rats.However, the Ra of glycerol was similar in the three groups.Andronate with HFD rat model showed ovarian and metabolic features of PCOS, significant increase in glucose Ra, GNG, and lipid profiles, as well as normal blood glucose levels.

View Article: PubMed Central - HTML - PubMed

Affiliation: Endocrinology and Metabolism Research Institute and Department of Endocrinology and Metabolism, Shanghai Ninth People's Hospital Affiliated Shanghai Jiaotong University School of Medicine, Shanghai 200011, China.

ABSTRACT

Background: There is a high prevalence of diabetes mellitus (DM) and dyslipidemia in women with polycystic ovary syndrome (PCOS). The purpose of this study was to investigate the role of different metabolic pathways in the development of diabetes mellitus in high-androgen female mice fed with a high-fat diet.

Methods: Female Sprague-Dawley rats were divided into 3 groups: the control group(C), n = 10; the andronate-treated group (Andronate), n = 10 (treated with andronate, 1 mg/100 g body weight/day for 8 weeks); and the andronate-treated and high-fat diet group (Andronate+HFD), n = 10. The rate of glucose appearance (Ra of glucose), gluconeogenesis (GNG), and the rate of glycerol appearance (Ra of glycerol) were assessed with a stable isotope tracer. The serum sex hormone levels, insulin levels, glucose concentration, and the lipid profile were also measured.

Results: Compared with control group, both andronate-treated groups exhibited obesity with higher insulin concentrations (P < 0.05) but similar blood glucose concentrations. Of the two andronate-treated groups, the andronate+HFD group had the most serious insulin resistance (IR). Estrus cycles were completely acyclic, with polycystic ovaries and elevated serum lipid profiles in the andronate+HFD group (P < 0.05). Ra of glucose and GNG increased significantly in the andronate+HFD rats. However, the Ra of glycerol was similar in the three groups.

Conclusions: Andronate with HFD rat model showed ovarian and metabolic features of PCOS, significant increase in glucose Ra, GNG, and lipid profiles, as well as normal blood glucose levels. Therefore, aberrant IR, increased glucose Ra, GNG, and lipid metabolism may represent the early-stage of glucose and lipid kinetics disorder, thereby might be used as potential early-stage treatment targets for PCOS.

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The main stages of the reproductive cycle in the control rats. Swab smears (unstained) shown with the original microscope magnification of 100×. A:Estrus stage: large cornified cells in clumps. B: Metestrus stage: large numbers of leucocytes with smaller numbers of non-nucleated epithelial cells (note characteristic clumping together of two cell types at the center-right). C: Diestrus stage: predominantly leucocytes with a small number of epithelial and cornified cells. D: Proestrus stage:epithelial cells are mostly rounded but some cells shows early stages of cornification of approaching estrus.
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Figure 5: The main stages of the reproductive cycle in the control rats. Swab smears (unstained) shown with the original microscope magnification of 100×. A:Estrus stage: large cornified cells in clumps. B: Metestrus stage: large numbers of leucocytes with smaller numbers of non-nucleated epithelial cells (note characteristic clumping together of two cell types at the center-right). C: Diestrus stage: predominantly leucocytes with a small number of epithelial and cornified cells. D: Proestrus stage:epithelial cells are mostly rounded but some cells shows early stages of cornification of approaching estrus.

Mentions: Reproductive cycles were assessed by vaginal smears. The control group exhibited regular estrous cycles (Figure 5), whereas the two experimental groups had prolonged or irregular estrous cycles, most of which showed a constant diestrus smear (Figure 5C).


Trace glucose and lipid metabolism in high androgen and high-fat diet induced polycystic ovary syndrome rats.

Zhai HL, Wu H, Xu H, Weng P, Xia FZ, Chen Y, Lu YL - Reprod. Biol. Endocrinol. (2012)

The main stages of the reproductive cycle in the control rats. Swab smears (unstained) shown with the original microscope magnification of 100×. A:Estrus stage: large cornified cells in clumps. B: Metestrus stage: large numbers of leucocytes with smaller numbers of non-nucleated epithelial cells (note characteristic clumping together of two cell types at the center-right). C: Diestrus stage: predominantly leucocytes with a small number of epithelial and cornified cells. D: Proestrus stage:epithelial cells are mostly rounded but some cells shows early stages of cornification of approaching estrus.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3278365&req=5

Figure 5: The main stages of the reproductive cycle in the control rats. Swab smears (unstained) shown with the original microscope magnification of 100×. A:Estrus stage: large cornified cells in clumps. B: Metestrus stage: large numbers of leucocytes with smaller numbers of non-nucleated epithelial cells (note characteristic clumping together of two cell types at the center-right). C: Diestrus stage: predominantly leucocytes with a small number of epithelial and cornified cells. D: Proestrus stage:epithelial cells are mostly rounded but some cells shows early stages of cornification of approaching estrus.
Mentions: Reproductive cycles were assessed by vaginal smears. The control group exhibited regular estrous cycles (Figure 5), whereas the two experimental groups had prolonged or irregular estrous cycles, most of which showed a constant diestrus smear (Figure 5C).

Bottom Line: Ra of glucose and GNG increased significantly in the andronate+HFD rats.However, the Ra of glycerol was similar in the three groups.Andronate with HFD rat model showed ovarian and metabolic features of PCOS, significant increase in glucose Ra, GNG, and lipid profiles, as well as normal blood glucose levels.

View Article: PubMed Central - HTML - PubMed

Affiliation: Endocrinology and Metabolism Research Institute and Department of Endocrinology and Metabolism, Shanghai Ninth People's Hospital Affiliated Shanghai Jiaotong University School of Medicine, Shanghai 200011, China.

ABSTRACT

Background: There is a high prevalence of diabetes mellitus (DM) and dyslipidemia in women with polycystic ovary syndrome (PCOS). The purpose of this study was to investigate the role of different metabolic pathways in the development of diabetes mellitus in high-androgen female mice fed with a high-fat diet.

Methods: Female Sprague-Dawley rats were divided into 3 groups: the control group(C), n = 10; the andronate-treated group (Andronate), n = 10 (treated with andronate, 1 mg/100 g body weight/day for 8 weeks); and the andronate-treated and high-fat diet group (Andronate+HFD), n = 10. The rate of glucose appearance (Ra of glucose), gluconeogenesis (GNG), and the rate of glycerol appearance (Ra of glycerol) were assessed with a stable isotope tracer. The serum sex hormone levels, insulin levels, glucose concentration, and the lipid profile were also measured.

Results: Compared with control group, both andronate-treated groups exhibited obesity with higher insulin concentrations (P < 0.05) but similar blood glucose concentrations. Of the two andronate-treated groups, the andronate+HFD group had the most serious insulin resistance (IR). Estrus cycles were completely acyclic, with polycystic ovaries and elevated serum lipid profiles in the andronate+HFD group (P < 0.05). Ra of glucose and GNG increased significantly in the andronate+HFD rats. However, the Ra of glycerol was similar in the three groups.

Conclusions: Andronate with HFD rat model showed ovarian and metabolic features of PCOS, significant increase in glucose Ra, GNG, and lipid profiles, as well as normal blood glucose levels. Therefore, aberrant IR, increased glucose Ra, GNG, and lipid metabolism may represent the early-stage of glucose and lipid kinetics disorder, thereby might be used as potential early-stage treatment targets for PCOS.

Show MeSH
Related in: MedlinePlus