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Secretagogues for pancreatic hormone release in the channel catfish (Ictalurus punctatus).

Abstract：

:We investigated the effect of several potential carbohydrate secretagogues, amino acids, a ketoacid, and potassium chloride on insulin, glucagon, and somatostatin release from the in vitro perfused Brockmann body of channel catfish (Ictalurus punctatus). Mannose (15 mM) stimulated the release of insulin and somatostatin. Fructose (30 mM) induced only a small and transient release of somatostatin. Galactose (15 mM) was not a secretagogue. Likewise, glyceraldehyde failed to stimulate hormone release. Among the amino acids newly tested, alanine and leucine, and also alpha-ketoisocaproic acid were without effect. A high concentration of potassium (25 mEq/liter) induced a pronounced release of insulin and glucagon and a moderate release of somatostatin. In conclusion, a striking similarity exists between catfish and higher vertebrates in their pancreatic endocrine response to hexoses; on the other hand, the catfish Brockmann body appears to respond only to a few of the common stimuli of pancreatic hormone release in mammals.

journal_name

Gen Comp Endocrinol

journal_title

General and comparative endocrinology

authors

Ronner P,Scarpa A

doi

10.1016/0016-6480(87)90120-1

subject

Has Abstract

pub_date

1987-03-01 00:00:00

pages

354-62

issue

3

eissn

0016-6480

issn

1095-6840

journal_volume

65

pub_type

杂志文章

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