title: Thyroxine-induced alterations in the testis and seminal vesicles of air-breathing catfish, Clarias gariepinus.
abstract: Effect of experimentally induced thyroxine overdose on the testis and seminal vesicles was studied in the air-breathing catfish, Clarias gariepinus during the preparatory and the pre-spawning phase. The present study revealed a marked reduction in testosterone level in serum, testis and seminal vesicles (SV). Histological examination showed a considerable reduction in the number of spermatozoa/spermatids in the seminiferous tubular lumen as well as depletion of fluid in the loculi of SV. SDS-PAGE analysis of SV fluid proteins demonstrated a significant decrease in the level of a ~27 kDa protein in thyroxine treated fishes. Evidences are presented here to indicate that thyroid hormone plays a role in regulating testis and SV function in catfish.
authors.affiliation: Department of Animal Sciences, School of Life Sciences, University of Hyderabad, Hyderabad, 500 046, India.
authors.forename: T N
authors.initials: TN
authors.lastname: Jacob
authors.forename: J P
authors.initials: JP
authors.lastname: Pandey
authors.forename: K
authors.initials: K
authors.lastname: Raghuveer
authors.forename: G
authors.initials: G
authors.lastname: Sreenivasulu
authors.forename: A D
authors.initials: AD
authors.lastname: Gupta
authors.forename: M
authors.initials: M
authors.lastname: Yoshikuni
authors.forename: A
authors.initials: A
authors.lastname: Jagota
authors.forename: B
authors.initials: B
authors.lastname: Senthilkumaran