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Journal of Environmental Biology

pISSN: 0254-8704 ; eISSN: 2394-0379 ; CODEN: JEBIDP

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    Abstract - Issue Sep 2009, 30 (5)                                     Back

Abstract _02

Testosterone and estradiol-17b dependent phospholipid biosynthesis in ovariectomized catfish, Heteropneustes fossilis (Bloch)


Vandana Singh, Pratap B. Singh* and Shailly Srivastava?

Department of Zoology, T.D. College, Jaunpur - 222 002, India

(Received: April 15, 2008; Revised received:October10,2208 ; Accepted: November 03, 2008)


Abstract: Effect of cumulative doses (7, 14 and 28 mgkg-1 body weight) of testosterone (T) and estradiol-17b (E2) on total phospholipids (TP), phosphatidylcholine (PC), phosphatidylserine (PS), phosphatidylinositol (PI) and phosphatidylethanolamine (PE) in tissues were investigated during the gonadal recrudescence, in prespawning phase of the annual reproductive cycle in intact and ovariectomized freshwater catfish, Heteropneustes fossilis. After ovariectomy, the hepatic levels of TP and PE were elevated and remained unaffected for PC, PS and PE when compared with control. In general, T and E2 were stimulatory for a specific class of phospholipid in tissues of intact and ovariectomized catfish. These effects were higher at 14 and 28 mg kg-1 body weight in ovariectomized catfish whereas 7 mgkg-1 body weight? of T and E2 have pronounced effect in intact ovaries. In conclusion, the various phospholipid biosynthesis were under T and E2 dependent. Among the phospholipid, the PC was the main constituent and was sex steroid dependent biosynthesis during prespawning phase.

Key words: Sex steroids, Phospholipid, Ovariectomy, Reproductive growth, Fish

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