Volume 16, Issue 4 (4-2018)                   IJRM 2018, 16(4): 235-246 | Back to browse issues page

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Sampannang A, Arun S, Burawat J, Sukhorum W, Iamsaard S. Testicular histopathology and phosphorylated protein changes in mice with diabetes induced by multiple-low doses of streptozotocin: An experimental study. IJRM. 2018; 16 (4) :235-246
URL: http://journals.ssu.ac.ir/ijrmnew/article-1-1060-en.html
1- Department of Anatomy, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
2- School of Medicine, Mae Fah Luang University, Chiang Rai 57100, Thailand
3- Department of Anatomy, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand , sittia@kku.ac.th
Abstract:   (107 Views)
Background: The streptozotocin (STZ)-induced diabetic model is widely used to evaluate the adverse effects of diabetes mellitus (DM) on spermatogenesis and testicular steroidogenesis. However, the actual mechanism of sub/infertility in DM males needs to be elucidated.
Objective: To conduct a detailed examination of the testicular histopathology, sperm acrosome reaction (AR) status, and tyrosine-phosphorylated protein expression in the testis of male mice induced with STZ.
Materials and Methods: Ten ICR mice were divided into two groups (n=5/each): control and diabetes induced by multiple low doses of streptozotocin (MLD-STZ). The control mice were intraperitoneally injected with citrate buffer, whereas MLD-STZ mice were injected with STZ at 40 mg/kg body weight for five consecutive days. At the end of the experiment (day 40), reproductive parameters, AR status, and the histopathology of the testis and epididymis were evaluated. The expression of testicular tyrosine phosphorylated proteins was examined.
Results: Blood glucose levels, AR percentages, and sperm abnormality of STZ group were significantly higher (p=0.003, 0.001, 0.000), while sperm concentration was significantly lower (p=0.001) compared to control. Histopathology of the seminiferous tubule was classified into 7 types. Additionally, abundant round cells were found in the epididymal lumen of the MLD-STZ mice. Moreover, the intensities of testicular phosphorylated proteins (170, 70, 36, 30, and 25 kDas) were markedly higher and a 120 kDa protein band was noticeably lower in the MLD-STZ mice.
Conclusion: MLD-STZ-induced DM causes many testicular histopathologies, precocious sperm AR, and increased expression of testicular phosphorylated proteins. These findings may clarify some mechanisms of sub/infertility in DM males.
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Type of Study: Original Article | Subject: Reproductive biology
Received: 2018/05/27 | Accepted: 2018/05/27 | Published: 2018/05/27

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