The mechanism of mesna in protection from cisplatin-induced ovarian damage in female rats / 부인종양

OBJECTIVE: Cisplatin is a widely used chemotherapeutic agent in the treatment of cancers in clinic; but it often induces adverse effects on ovarian functions such as reduced fertility and premature menopause. Mesna could attenuate the cisplatin-induced ovarian damages; however, the underlying mechanism is still unknown. This study aimed to figure out the underlying mechanism of the protection of mesna for ovaries against cisplatin therapy in cancers. METHODS: We performed female adult Sprague-Dawley rats into normal saline control (NS), low-dose cisplatin (CL), high-dose cisplatin (CH), CL plus mesna (CL+M), and CH plus mesna (CH+M) groups and detected anti-Mullerian hormone (AMH)-positive follicle, oxidative stress status and anti-oxidative capability in ovaries. RESULTS: AMH-positive follicles were significantly decreased after cisplatin administration, which was significantly reversed when mesna was co-administered with cisplatin. The end product of lipid peroxidation, malondialdehyde (MDA), was significantly increased, but the anti-oxidative enzymatic activity of superoxide dismutase (SOD) and glutathione (GSH) were significantly decreased in cisplatin groups when compared with NS group. In contrast, after co-administration of cisplatin with mesna, MDA was significantly decreased whereas the activity of SOD and the concentration of GSH were increased. Moreover, mesna did not decrease the anti-tumor property of cisplatin in HePG2 cell lines. CONCLUSION: Cisplatin damages the granulosa cells by oxidative stress to deplete the ovarian reserve and mesna could protect ovarian reserve through anti-oxidation. These results might highlight the mechanism of the protection of mesna for ovarian reserve and open an avenue for the application of mesna as a protective additive in cisplatin chemotherapy in clinical practise.

Medical education in university at buffalo the state university of New York / 中华医学教育探索杂志

Medical education in the United States is efficient and successful. This article introduces the departments, admission and programs, especially MD programs in School of Medicine & Biomedical Sciences, University at Buffalo, the State University of New York.

Effects of carbon monoxide on hypoxia inducible factor-1expression in hypoxia preconditioned mice / 中国病理生理杂志

AIM: To study the effect of carbon monoxide (CO) on hypoxia inducible factor-1? (HIF-1?) expression and on hypoxic tolerance duration in hypoxia preconditioned mice. METHODS: Mice were injected with normal saline (NS) or hemin intraperitoneally. Western blot was used to detect HIF-1? in hippocampus. The tolerant duration of each hypoxic run was recorded. RESULTS: After 1 and 2 runs of hypoxia exposure, there were no significant differences in HIF-1? expression and hypoxic tolerance duration between N and hemin injection groups. After 3 and 4 runs of hypoxia exposure, the content of HIF-1? was lower and hypoxic tolerance duration was shorter ( P