Mapping of antigenic epitopes within the recombinant human preproinsulin related to insulin-dependent diabetes mellitus.

Abstract:

:The human insulin domains, signal peptide, B-chain, C-peptide, and A-chain, were highly expressed in Escherichia coli as recombinant proteins N-terminally fused to glutathione-S-transferase and a histidine-hexapeptide. The recombinant proteins were purified from insoluble cell fraction by affinity chromatography using metal chelating matrix, which was charged with Ni+2 ions. ELISA screening for autoantibodies directed to preproinsulin were performed with sera from patients with recently diagnosed insulin-dependent diabetes mellitus in order to localize the antigenic epitopes within the human preproinsulin. Of the patients, 14% had developed autoantibodies that recognized either the recombinant C-peptide or the signal peptide. No reaction was observed with the A-chain or B-chain.

journal_name

J Clin Lab Anal

authors

Walter M,Berg H,Northemann W

doi

10.1002/jcla.1860080309

subject

Has Abstract

pub_date

1994-01-01 00:00:00

pages

163-6

issue

3

eissn

0887-8013

issn

1098-2825

journal_volume

8

pub_type

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