NDLI: Biological properties of Indian walking catfish (Clarias batrachus) (L.) gonadotropins in female reproduction

Content Provider	Springer Nature Link
Author	Sarkar, Shrabanti Bhattacharya, Debapriya Juin, Subir Kumar Nath, Panchanan
Copyright Year	2014
Abstract	The biological activities of catfish LH-like (semi-purified: s200a and purified Qa) and FSH-like (semi-purified: s200b and purified: Qb) were compared in intact and hypophysectomized female catfish, Clarias batrachus, during preparatory and the pre-spawning periods on vitellogenesis and ovarian maintenance, as well as in vitro final maturation of oocytes, germinal vesicle breakdown (GVBD). During preparatory period, in intact catfish, semi-purified FSH-like induced complete vitellogenesis through the production of estradiol-17β (E2) and vitellogenin (Vg) accompanied by the formation of SIII yolky oocytes. On the other hand, semi-purified LH-like had induced the formation of only SII (characterized by the appearance of cortical alveoli in cytoplasm) oocytes, which indicates the initiation of vitellogenesis. In hypophysectomized female catfish, purified LH-like but not FSH-like induced the formation of SII oocytes in the ovaries. Treatment with semi-purified LH- and FSH-like at the dose level of 5 µg/fish/day for 7 days significantly maintained the yolky oocytes in gravid catfish after hypophysectomy with a significant reduction in plasma Vg, but not E2 levels, indicating some unknown GtH-induced factor doing the job. In in vitro oocytes culture, both LH- and FSH-like induced GVBD, but the response was significantly more with LH-like than FSH-like. All these findings revealed that both LH-like and FSH-like have overlapping physiological functions, but their responses differ depending on the physiological status of the catfish.
Starting Page	1849
Ending Page	1861
Page Count	13
File Format	PDF
ISSN	09201742
Journal	Fish Physiology and Biochemistry
Volume Number	40
Issue Number	6
e-ISSN	15735168
Language	English
Publisher	Springer Netherlands
Publisher Date	2014-08-22
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Catfish Gonadotropin LH-like FSH-like Vitellogenesis Oocyte maturation Freshwater & Marine Ecology Animal Physiology Animal Anatomy / Morphology / Histology Animal Biochemistry Zoology
Content Type	Text
Resource Type	Article
Subject	Physiology Medicine Biochemistry Aquatic Science

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