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Diabetes, Vol 40, Issue 12 1611-1614, Copyright © 1991 by American Diabetes Association

ARTICLES

Aggregation of subclinical autonomic nervous system dysfunction and autoantibodies in families with type I diabetes

FM Brown, M Watts and SL Rabinowe
Neuroendocrine Immunology Laboratory, Joslin Diabetes Center, Boston, MA 02215.

The purpose of our study was to evaluate the occurrence of autonomic nervous system autoantibodies (ANS) in the nondiabetic family members of insulin-dependent (type I) diabetic subjects. We studied 24 families, including 45 nondiabetic parents and 53 nondiabetic siblings of a type I diabetic proband. One hundred one nondiabetic population control subjects were also studied. Stored sera from nondiabetic family members and control subjects were evaluated for the presence of complement-fixing (CF) adrenal medullary antibodies (CF-ADM), sympathetic ganglia antibodies (CF-SG), and vagus nerve antibodies (CF-V) by indirect immunofluorescence. HLA-DR3 and -DR4 typing was performed on 42 nondiabetic family members and 104 diabetic subjects. One or more CF-ANS were in 45 of 93 (40%) nondiabetic family members compared to 2 of 70 (2.8%) control subjects. CF-SG were in 28 of 92 (30%) family members compared to 0 of 101 control subjects (P = 0.0001). CF-V were in 25 of 95 (26%) family members compared to 0 of 76 control subjects (P = 0.0001). CF-ADM were in 10 of 83 (12%) family members compared to 2 of 70 (2.8%) control subjects (P = 0.056). There was no HLA-DR3 or HLA-DR4 association with ANS. Subclinical autonomic dysfunction was demonstrated in 3 of 4 family members with autoantibodies compared to 0 of 4 family members without autoantibodies.
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Copyright © 1991 by the American Diabetes Association.