Met5-enkephalin-Arg6-Gly7-Leu8 immunoreactivity in the human gut.

Abstract:

:The presence of the proenkephalin A-derived peptide Met5-enkephalin-Arg6-Gly7-Leu8 was demonstrated throughout the human gastrointestinal tract. Highest concentrations of Met5-enkephalin-Arg6-Gly7-Leu8, as assessed by radioimmunoassay, were measured in the separated muscularis externa, while lower levels were found in the submucosa and only small amounts in the mucosa. The results are consistent with a neuronal location of this peptide in the human gut. Over 65% of total immunoreactivity coeluted with the authentic peptide in both molecular exclusion chromatography and HPLC, while most of the remainder activity eluted earlier on gel filtration. The latter material probably represents N-terminally extended Met5-enkephalin-Arg6-Gly7-Leu8. Taken together with previous studies, our results appear to indicate that there are important species differences in post-translational processing of proenkephalin A in gut nerves.

journal_name

Peptides

journal_title

Peptides

authors

Ferri GL,Morreale RA,Dockray GJ

doi

10.1016/0196-9781(86)90087-2

subject

Has Abstract

pub_date

1986-09-01 00:00:00

pages

735-9

issue

5

eissn

0196-9781

issn

1873-5169

pii

0196-9781(86)90087-2

journal_volume

7

pub_type

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