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Expression Analysis of Glutathione Peroxidase Genes in the Stage-Specific Seminiferous Tubules of Mice Excised by a Laser Capture Microdissection  

Yon, Jung-Min (College of Veterinary Medicine & Research Institute of Veterinary Medicine, Chungbuk National University)
Lin, Chun-Mei (College of Veterinary Medicine & Research Institute of Veterinary Medicine, Chungbuk National University)
Park, Jung-Hoon (College of Veterinary Medicine & Research Institute of Veterinary Medicine, Chungbuk National University)
Hong, Min-Ki (College of Veterinary Medicine & Research Institute of Veterinary Medicine, Chungbuk National University)
Jung, A-Young (College of Veterinary Medicine & Research Institute of Veterinary Medicine, Chungbuk National University)
Kim, Mi-Ra (College of Veterinary Medicine & Research Institute of Veterinary Medicine, Chungbuk National University)
Baek, In-Jeoung (Laboratory of Mammalian Molecular Genetics, Dept. of Biochemistry, College of Science, Yonsei University)
Lee, Beom-Jun (College of Veterinary Medicine & Research Institute of Veterinary Medicine, Chungbuk National University)
Nam, Sang-Yoon (College of Veterinary Medicine & Research Institute of Veterinary Medicine, Chungbuk National University)
Yun, Young-Won (College of Veterinary Medicine & Research Institute of Veterinary Medicine, Chungbuk National University)
Publication Information
Development and Reproduction / v.14, no.2, 2010 , pp. 99-105 More about this Journal
Abstract
The seminiferous epithelium, with its division into 12 spermatogenic stages in the mouse, is a very complex tissue. Glutathione peroxidase (GPx) is a representative antioxidant enzyme that is capable of reducing organic hydroperoxides to their corresponding hydroxyl compounds utilizing glutathione and is related to the mammalian spermatogenesis. In this study, a real-time PCR was performed in the stage-specific seminiferous tubules of mouse testes excised by a laser capture microdissection (LCM) in order to quantitate the expression levels of a series of GPx genes including cytosolic GPx (cGPx), gastrointestinal GPx (GI-GPx), plasma GPx (pGPx), and phospholipid hydroperoxide GPx (PHGPx). Frozen sections (10 ${\mu}m$) were obtained from normal adult mouse testes. LCM was used to capture all the cells that were grouped into stages I-V, VII-VIII, and IX-XI in cross-sections of seminiferous tubules. The expression level of PHGPx mRNA was remarkably higher than those of other GPx mRNAs in mouse testes. During spermatogenesis, the expressions of GI-GPx, pGPx, and PHGPx mRNAs were highest on stages VII-VIII, began to decrease after stage XI, and showed a lowest level on stage I-V. However, the expressions of cGPx mRNA were highest on stages VII-VIII, and showed a lowest level on stage XI-XI. These findings indicate that GPx genes are expressed differentially on mouse spermatogenesis and also LCM can be an useful tool in cellular quantitative analysis of testes.
Keywords
Glutathione peroxidase; Spermatogenesis; Laser capture microdissection; Real-time PCR;
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