Related Experiment Videos
Prosomatostatin processing in anglerfish brain, gut and pancreas
A Morel1, P F Kuks, J Bourdais
1Université Pierre et Marie Curie, Groupe de Neurobiochimie Cellulaire et Moléculaire, UA 554 au CNRS, Paris, France.
Biochemical and Biophysical Research Communications
|February 29, 1988
Summary
Anglerfish express two distinct somatostatin precursors in neural and gastro-intestinal tissues. Their processing follows a fixed pattern, yielding specific somatostatin forms in teleost fish.
Area of Science:
- Comparative endocrinology
- Molecular biology
- Fish physiology
Background:
- Somstatins are peptide hormones with diverse physiological roles.
- Mammalian somatostatin production involves distinct precursors.
- Understanding fish somatostatin processing provides evolutionary insights.
Purpose of the Study:
- To investigate the distribution and processing of somatostatin in anglerfish (Lophius piscatorius L.).
- To identify the specific somatostatin forms generated from their precursors.
- To compare somatostatin production mechanisms between teleost fish and mammals.
Main Methods:
- Gel permeation chromatography to separate molecular sizes.
- High-Performance Liquid Chromatography (HPLC) for peptide purification.
- Amino acid analysis to determine peptide composition.
Main Results:
- Prosomatostatin I and II are expressed in both neural and gastro-intestinal tissues.
- Post-translational processing yields somatostatin-14 I and somatostatin-28 II.
- A hydroxylysine23-derivative of somatostatin-28 II was also identified.
Conclusions:
- Teleost fish utilize two distinct, structurally different precursors for somatostatin production.
- Somatostatin precursor processing in anglerfish is not tissue-specific but follows a fixed pattern.
- This contrasts with mammalian systems, highlighting evolutionary divergence in somatostatin regulation.