Neurohormonal peptides in the gut of the Atlantic hagfish (Myxine glutinosa) detected using antisera raised against mammalian regulatory peptides.

General and Comparative Endocrinology
J M Conlon, S Falkmer

Abstract

Concentrations of regulatory peptides in an extract of the intestine of the cyclostome, Myxine glutinosa (Atlantic hagfish), were measured by radioimmunoassay using 12 antisera of defined regional specificity that were raised against mammalian gastrointestinal peptides. The hagfish gut contained somatostatin-, cholecystokinin/gastrin-, C-terminal substance P-, and neurokinin A-like immunoreactivity in concentrations that were 10 to 100 times less than the corresponding concentrations in the rat intestine. The hagfish gut also contained glucagon-like immunoreactivity, measured with both C- and N-terminally directed antisera, but the immunoreactivity did not dilute in parallel with the porcine glucagon standard in radio-immunoassay. No immunoreactivity was detected using antisera to calcitonin gene-related peptide, gastrin-releasing peptide, neuromedin U, neurotensin, N-terminal substance P, and vasoactive intestinal polypeptide. The somatostatin-like immunoreactivity in the hagfish gut was resolved by HPLC into components with the retention times of somatostatin-34 and somatostatin-14, previously isolated from the hagfish islet organ (relative abundance 2:1). The retention times of hagfish glucagon and of the multiple molecular ...Continue Reading

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Citations

Sep 1, 1990·Fish Physiology and Biochemistry·S Van Noorden
Sep 1, 1990·Parasitology Today·D W HaltonC F Johnston
Oct 18, 2000·Regulatory Peptides·I L Gibbins, J L Morris
Jan 1, 1991·Parasitology·I Fairweather, D W Halton
Feb 1, 1993·Journal of Autonomic Pharmacology·C A MaggiA Giachetti
Sep 1, 1991·General and Comparative Endocrinology·J Jensen, S Holmgren
May 3, 2005·General and Comparative Endocrinology·Laura E Nelson, Mark A Sheridan
Nov 30, 2018·Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology·Alyssa M WeinrauchGreg G Goss

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