Abstract:
:It is well documented that g-aminobutyric acid (GABA) system existed in reproductive organs. Recent researches showed that GABAA and GABAB receptors were present in testis and sperm, and might mediate the acrosome reaction induced by GABA and progesterone. GABA transporter I (GAT1) also existed in testis and sperm, but its physiological function was unknown. In the present study, we used GAT1 overexpressing mice to explore GAT1 function in male reproductive system. We found that the expression level of GAT1 continuously increased in wild-type mouse testis from 1 month to 2 months after birth. GAT1 overexpression in mouse affected testis development, which embodied reduced testis mass and slowed spermatogenesis in transgenic mice. Moreover, transgenic mice showed increase of the percentage of broken sperm. The further study revealed that the reproductive capacity was impaired in GAT1 overexpressing mice. In addition, testosterone level was significantly low in transgenic mice compared with that in wild-type mice. Our findings provided the first evidence that abnormal expression of GAT1 could result in dysgenesis, and indicated that GAT1 might be therapeutically targeted for contraception or dysgenesis treatment.
journal_name
Cell Resjournal_title
Cell researchauthors
Hu JH,Zhang JF,Ma YH,Jiang J,Yang N,Li XB,Yu Chi ZG,Fei J,Guo LHdoi
10.1038/sj.cr.7290202keywords:
subject
Has Abstractpub_date
2004-02-01 00:00:00pages
54-9issue
1eissn
1001-0602issn
1748-7838journal_volume
14pub_type
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