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Control of ion transport by the sperm duct epithelium of brook trout (Salvelinus fontinalis) by William S. Marshall; Sharon E. Bryson; David R. Idler is a Agricultural and Biological Sciences article available to read on EtoBox.

What is Control of ion transport by the sperm duct epithelium of brook trout (Salvelinus fontinalis) about?

The sperm duct epithelium of brook trout (Salvelinus fontinalis), mountedin vitro in Ussing-style epithelial chambers actively absorbs Na(+) (measured as the short-circuit current, Isc) and secretes K(+) (measured using(86)Rb(+) as tracer). Dibutyryl-cyclic-adenosine monophosphate (db-cAMP) and 3-isobutyl-1-methylxanthine (IMX) produce a rapid, sustained stimulation of both ion transport processes, but the hormone connected to the response is unknown. Purified sockeye salmon CON A2 gonadotropin (GtH) produces a dose-dependent, rapid and sustained rise in Na(+) uptake and K(+) secretion. The time course, electrophysiological and transport characteristics are similar to those evoked by IMX. Carbohydrate-poor (chum salmon CON A1) GtH is ineffective. Pretreatment of fish with 17α,20β-dihydroxy-4-pregnen-3-one (17α,20β-P) significantly increases milt volume but is without effect on resting or stimulated (IMX + db-cAMP) levels of sperm duct ion transport. This is the first indication of a direct, rapid action of GtH on ion transport by the vertebrate blood-testis barrier. The results suggest direct involvement of GtH in control of later stages of sperm maturation.

Who reads Control of ion transport by the sperm duct epithelium of brook trout (Salvelinus fontinalis)?

Author

William S. Marshall; Sharon E. Bryson; David R. Idler

Publisher

Springer; Springer-Verlag; Kluwer Academic Publishers; Springer Science and Business Media LLC; Society for Mining, Metallurgy and Exploration Inc. (ISSN 0920-1742)

Published

1989

Language

EN

Field

Agricultural and Biological Sciences (Life Sciences)