When the synergistic effect leads to ATP overproduction in cells, it can cause insulin resistance through multiple mechanisms, such as excess secretion of insulin in β-cells and excess glucagon secretion in α-cells. As a consequence of ROS elevation, mutations in mtDNA, decreases in mitochondrial membrane potential, and abnormal expression of the respiratory chain complexes were reported in the PCOS rats (146). These changes correspond to a reduction in the mitochondrial number and "whitening" of the interscapular BAT in androgen-induced PCOS models (140). Interestingly, BAT mass and function are both decreased in PCOS patients with elevated circulating androgen levels (141). However, mitochondrial dysfunction was not observed in the study of PCOS patients using the primary myotubes (139). This mitochondrial dysfunction is supported by a decrease in other mitochondrial proteins including PGC-1α and Cidea (cell death-inducing DNA fragmentation factor-like effector A). This dysfunction is likely the result of mitochondrial overactivation by androgens in the presence of estrogens. In patients with PCOS, mitochondrial dysfunction was reported by a reduction in superoxide dismutase levels, [https://hackmd.okfn.de/s/SyypaPYj-e](https://hackmd.okfn.de/s/SyypaPYj-e) mtDNA copy number, mitochondrial membrane potential, and ATP levels (138). The excessive androgens in the presence of estrogens induce mitochondrial dysfunction in polycystic ovary syndrome (PCOS) patients. This possibility is supported by mitochondrial changes in the skeletal muscle, BAT, and β-cells in PCOS models (Figure 2). Several studies demonstrated that the two subpopulations respond differently to physiological or pathological stimuli (17). The literature suggests that SSM produces ATP to maintain the active transport of electrolytes and metabolites across the cell membrane, while IFM produce ATP to maintain the contractile function due to its location near the contractile machinery (17). Testosterone plays an important role in the regulation of carbohydrate, fat and protein metabolism (12), which are strictly regulated by substrate availability and endocrine signaling (13). However, the mechanisms mediating [buy testosterone injections](https://topspots.cloud/item/591208)’s myocardial actions remain unclear. There was no difference in swelling of the mitochondria in either group. Results show that low testosterone reduced myocardial contractility. This reduction is observed in the transcription factors including NRF-1, TFAM, and PGC-1α in the skeletal muscle of estrogen-deficient female rats (117). The estrogen-regulated mitochondrial biogenesis markers include PGC-1α (111, 112) and NRFs. Mitochondria play an important role in estrogen’s effects on energy metabolism (31, 107). Estrogen has a broad impact on energy metabolism through the regulation of mitochondria. Aromatase, which is encoded by CYP19A1 gene, actively converts testosterone into estradiol in granulosa cells located in the ovaries (99). ROS increases cell apoptosis in testosterone-deprived men and male rats (94), which were attenuated by exogenous [buy testosterone online without prescription](https://scientific-programs.science/wiki/Testosterone_Replacement_Therapy) supplementation (95). Reduced estrogen levels in postmenopausal patients lead to an increased risk of insulin resistance, which can be improved by estrogen supplementation (19). Testosterone-driven energy metabolism favors energy expenditure to prevent metabolic disorders, such as obesity and type 2 diabetes in male subjects (2, 3). Additionally, androgens have receptor-independent activity in the regulation of endothelial cell proliferation (1). It is produced by the testis in males and ovarian interstitial cells in females. Testosterone is the primary sex hormone in regulating male sex organ development and reproduction activities. This view suggests a unifying mechanism for the distinct metabolic roles of androgens in the control of insulin action in men with hypogonadism and women with PCOS. In the skeletal muscle and liver, the ATP surplus contributes to insulin resistance through suppression of AMPK and activation of mTOR.
When the synergistic effect leads to ATP overproduction in cells, it can cause insulin resistance through multiple mechanisms, such as excess secretion of insulin in β-cells and excess glucagon secretion in α-cells. As a consequence of ROS elevation, mutations in mtDNA, decreases in mitochondrial membrane potential, and abnormal expression of the respiratory chain complexes were reported in the PCOS rats (146). These changes correspond to a reduction in the mitochondrial number and "whitening" of the interscapular BAT in androgen-induced PCOS models (140). Interestingly, BAT mass and function are both decreased in PCOS patients with elevated circulating androgen levels (141). However, mitochondrial dysfunction was not observed in the study of PCOS patients using the primary myotubes (139). This mitochondrial dysfunction is supported by a decrease in other mitochondrial proteins including PGC-1α and Cidea (cell death-inducing DNA fragmentation factor-like effector A). This dysfunction is likely the result of mitochondrial overactivation by androgens in the presence of estrogens. In patients with PCOS, mitochondrial dysfunction was reported by a reduction in superoxide dismutase levels, [https://hackmd.okfn.de/s/SyypaPYj-e](https://hackmd.okfn.de/s/SyypaPYj-e) mtDNA copy number, mitochondrial membrane potential, and ATP levels (138). The excessive androgens in the presence of estrogens induce mitochondrial dysfunction in polycystic ovary syndrome (PCOS) patients. This possibility is supported by mitochondrial changes in the skeletal muscle, BAT, and β-cells in PCOS models (Figure 2). Several studies demonstrated that the two subpopulations respond differently to physiological or pathological stimuli (17). The literature suggests that SSM produces ATP to maintain the active transport of electrolytes and metabolites across the cell membrane, while IFM produce ATP to maintain the contractile function due to its location near the contractile machinery (17). Testosterone plays an important role in the regulation of carbohydrate, fat and protein metabolism (12), which are strictly regulated by substrate availability and endocrine signaling (13). However, the mechanisms mediating [buy testosterone injections](https://topspots.cloud/item/591208)’s myocardial actions remain unclear. There was no difference in swelling of the mitochondria in either group. Results show that low testosterone reduced myocardial contractility. This reduction is observed in the transcription factors including NRF-1, TFAM, and PGC-1α in the skeletal muscle of estrogen-deficient female rats (117). The estrogen-regulated mitochondrial biogenesis markers include PGC-1α (111, 112) and NRFs. Mitochondria play an important role in estrogen’s effects on energy metabolism (31, 107). Estrogen has a broad impact on energy metabolism through the regulation of mitochondria. Aromatase, which is encoded by CYP19A1 gene, actively converts testosterone into estradiol in granulosa cells located in the ovaries (99). ROS increases cell apoptosis in testosterone-deprived men and male rats (94), which were attenuated by exogenous [buy testosterone online without prescription](https://scientific-programs.science/wiki/Testosterone_Replacement_Therapy) supplementation (95). Reduced estrogen levels in postmenopausal patients lead to an increased risk of insulin resistance, which can be improved by estrogen supplementation (19). Testosterone-driven energy metabolism favors energy expenditure to prevent metabolic disorders, such as obesity and type 2 diabetes in male subjects (2, 3). Additionally, androgens have receptor-independent activity in the regulation of endothelial cell proliferation (1). It is produced by the testis in males and ovarian interstitial cells in females. Testosterone is the primary sex hormone in regulating male sex organ development and reproduction activities. This view suggests a unifying mechanism for the distinct metabolic roles of androgens in the control of insulin action in men with hypogonadism and women with PCOS. In the skeletal muscle and liver, the ATP surplus contributes to insulin resistance through suppression of AMPK and activation of mTOR.