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. 1982 Jul;70(1):41–49. doi: 10.1172/JCI110601

Islet Cell Surface Antibodies from Insulin-dependent Diabetics Bind Specifically to Pancreatic B Cells

M Van De Winkel 1,2, G Smets 1,2, W Gepts 1,2, D Pipeleers 1,2
PMCID: PMC370224  PMID: 6123526

Abstract

Viable rat islet cells were used to detect islet cell surface antibodies (ICSA) in the sera of diabetic and control patients. ICSA were present in almost all recent-onset insulin-dependent diabetics younger than 30 yr (15/16); their incidence in other diabetics (6/22) was also higher than in normal controls (1/18) or in patients with autoimmune thyroiditis (1/12). The varying specificity of the ICSA for the different islet cell types led to the recognition of class I sera, whose ICSA bind exclusively to B cells, class II sera, binding only to A and pancreatic polypeptide (PP) cells and class III sera, reacting with the three islet cell types but not with D cells. Most recent-onset insulin-dependent diabetics younger than 30 contained class I-ICSA, which is consistent with an autoimmune basis of their disease and with an involvement of surface antibodies in the B cell destruction. The presence of class II ICSA in three older diabetics and in one normal control raises the question whether autoimmune reactions against A and PP cells exist and are associated with a distinct entity in islet disease.

It is concluded that the autoimmune form of diabetes mellitus represents a heterogeneous group, in which ICSA-positive patients can be distinguished on the basis of their ICSA-binding to one or more islet cell types.

Three techniques can be used for the further identification of circulating ICSA, namely binding experiments with purified A or B cells, electron microscopical analysis of ICSA-binding islet cells purified by fluorescence-activated cell sorting, and the immunocytochemical characterization of ICSA-positive cells.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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