کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1972868 1060298 2010 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Cloning and differential expression pattern of vasa in the developing and recrudescing gonads of catfish, Clarias gariepinus
موضوعات مرتبط
علوم زیستی و بیوفناوری بیوشیمی، ژنتیک و زیست شناسی مولکولی زیست شیمی
پیش نمایش صفحه اول مقاله
Cloning and differential expression pattern of vasa in the developing and recrudescing gonads of catfish, Clarias gariepinus
چکیده انگلیسی

Vasa gene codes for a DEAD box family protein, which plays a crucial role in primordial germ cell proliferation. In this study, we report cloning of vasa from gonads of air-breathing catfish, Clarias gariepinus, a seasonally reproducing teleost fish. We studied the expression pattern of vasa during gametogenesis using real-time PCR. We also examined the hormonal regulation on vasa in gonads of catfish. RT-PCR analysis revealed that vasa was detectable only in the gonads. Further, real-time PCR results showed that expression of vasa was seen throughout the development from embryonic stage to adult. However, the expression was more in ovary than in testis during gonadal development. In adult testis, the vasa transcripts were significantly high during spermatogenesis and it declined during spermiation. On the other hand, during ovarian recrudescence, vasa transcripts were high in immature oocytes (stages I and II oocytes) when compared to mature oocytes (stages III and IV oocytes). Human chorionic gonadotropin treatment in recrudescing ovary (in vivo) as well as in testicular slices (in vitro) resulted in up regulation of vasa mRNA in a time-dependant manner. These results together suggest that vasa gene has got an important role to play in spermatogenesis and oogenesis during recrudescence in addition to development.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Comparative Biochemistry and Physiology Part A: Molecular & Integrative Physiology - Volume 157, Issue 1, September 2010, Pages 79–85
نویسندگان
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