Objective To analyse quantitative changes of testicular peritubular cells in aging mice, and meanwhile investigate age-related changes in both Sertoli cells and germ cells with stereology. Methods Thirty male Kunming ...Objective To analyse quantitative changes of testicular peritubular cells in aging mice, and meanwhile investigate age-related changes in both Sertoli cells and germ cells with stereology. Methods Thirty male Kunming mice were enrolled in this study. The aged mice （n=15） were 18 months old. The young mice （n=15） were 6 months old, as the control. Haematoxylin and eosin staining was used to observe histological changes. Pathological evaluation rules of assignment scores were made to evaluate. Stereology techniques were applied to quantitatively analyse histological structure of the testicular tissues. Results Compared with young group, pathologic assignment scores of aging group were significantly higher （P〈0.05）. Diameter of seminiferous tubules in aging mice was atrophied significantly （P〈0.05）. Germ cell numerical density and Sertoli cell volume density of aging group were reduced significantly compared with young group （P〈0.05）. No significant differences were found in peritubular cell parameters compared with young group （P〉0.05）. Conclusion The pathological assignment scores suggest a succession of changes on the testis with age. The stereological numbers demonstrate damaged Sertoli cells and decreased germ cells, which is indicative of spermatogenic disturbance. However, no significant quantity changes of peritubular cells is observed in aging mice.展开更多
Chinese forest musk deer(FMD),an endangered species,have exhibited low reproductive rates even in captivity due to stress conditions.Investigation revealed the presence of di(2-ethylhexyl)phthalate(DEHP),an environmen...Chinese forest musk deer(FMD),an endangered species,have exhibited low reproductive rates even in captivity due to stress conditions.Investigation revealed the presence of di(2-ethylhexyl)phthalate(DEHP),an environmental endocrine disruptor,in the serum and skin of captive FMDs.Feeding FMDs with maslinic acid(MA)has been observed to alleviate the stress response and improve reproductive rates,although the precise molecular mechanisms remain unclear.Therefore,this study aims to investigate the molecular mechanisms underlying the alleviation of DEHP-induced oxidative stress and cell apoptosis in primary peritubular myoid cells(PMCs)through MA intake.Primary PMCs were isolated and exposed to DEHP in vitro.The results demonstrated that DEHP significantly suppressed antioxidant levels and promoted cell apoptosis in primary PMCs.Moreover,interfering with the expression of PRDX6 was found to induce excessive reactive oxygen species(ROS)production and cell apoptosis in primary PMCs.Supplementation with MA significantly upregulated the expression of PRDX6,thereby attenuating DEHP-induced oxidative stress and cell apoptosis in primary PMCs.These findings provide a theoretical foundation for mitigating stress levels and enhancing reproductive capacity of in captive FMDs.展开更多
文摘Objective To analyse quantitative changes of testicular peritubular cells in aging mice, and meanwhile investigate age-related changes in both Sertoli cells and germ cells with stereology. Methods Thirty male Kunming mice were enrolled in this study. The aged mice （n=15） were 18 months old. The young mice （n=15） were 6 months old, as the control. Haematoxylin and eosin staining was used to observe histological changes. Pathological evaluation rules of assignment scores were made to evaluate. Stereology techniques were applied to quantitatively analyse histological structure of the testicular tissues. Results Compared with young group, pathologic assignment scores of aging group were significantly higher （P〈0.05）. Diameter of seminiferous tubules in aging mice was atrophied significantly （P〈0.05）. Germ cell numerical density and Sertoli cell volume density of aging group were reduced significantly compared with young group （P〈0.05）. No significant differences were found in peritubular cell parameters compared with young group （P〉0.05）. Conclusion The pathological assignment scores suggest a succession of changes on the testis with age. The stereological numbers demonstrate damaged Sertoli cells and decreased germ cells, which is indicative of spermatogenic disturbance. However, no significant quantity changes of peritubular cells is observed in aging mice.
基金supported by the Fund of Sci-Tech Innovation Program of Shaanxi Academy of Forestry(No.SXLK2021-0219)the Science and Technology Project of Shaanxi Province(No.2022SF-512)the Science and Technology Innovation and Achievement Transformation Project of Experimental Demonstration Station(base)of Northwest A&F University(No.TGZX2021-32)。
文摘Chinese forest musk deer(FMD),an endangered species,have exhibited low reproductive rates even in captivity due to stress conditions.Investigation revealed the presence of di(2-ethylhexyl)phthalate(DEHP),an environmental endocrine disruptor,in the serum and skin of captive FMDs.Feeding FMDs with maslinic acid(MA)has been observed to alleviate the stress response and improve reproductive rates,although the precise molecular mechanisms remain unclear.Therefore,this study aims to investigate the molecular mechanisms underlying the alleviation of DEHP-induced oxidative stress and cell apoptosis in primary peritubular myoid cells(PMCs)through MA intake.Primary PMCs were isolated and exposed to DEHP in vitro.The results demonstrated that DEHP significantly suppressed antioxidant levels and promoted cell apoptosis in primary PMCs.Moreover,interfering with the expression of PRDX6 was found to induce excessive reactive oxygen species(ROS)production and cell apoptosis in primary PMCs.Supplementation with MA significantly upregulated the expression of PRDX6,thereby attenuating DEHP-induced oxidative stress and cell apoptosis in primary PMCs.These findings provide a theoretical foundation for mitigating stress levels and enhancing reproductive capacity of in captive FMDs.
