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Journal of Clinical Endocrinology & Metabolism, Vol 47, 985-995, Copyright © 1978 by Endocrine Society
ARTICLES |
JS Flier, RS Bar, M Muggeo, CR Kahn, J Roth and P Gorden
Three patients with insulin resistance caused by autoantibodies to the insulin receptor were investigated serially over a 3-yr period. Major changes in carbohydrate metabolism, insulin receptor status, and titer of antireceptor antibodies were observed in each case. In one patient, normalization of glucose tolerance, insulin sensitivity, and receptor binding were associated with a spontaneous fall in the titer of antireceptor antibody. A second, more severely affected patient had two entirely distinct phase to her illness. The first, or hyperglycemic phase, was characterized by insulin resistance, negligible insulin binding to receptors on circulating monocytes, and high titers of circulating antireceptor antibodies. The second phase was characterized by refractory hypoglycemia, in association with proliferation of membrance insulin receptors; these occurred despite persistence of high titers of antireceptor antibody. An unusual heptic lesion, diffuse adenomatosis, was observed during this phase. A third patient showed features of both of the other patients, with spontaneous fall in antibody titer as well as a later phase of receptor proliferation. These studies demonstrate that patients with antibodies to insulin receptors may have a fluctuating clinical course. There may be spontaneous changes in antibody titers as well as independent changes in receptor concentration. Hypoglycemia and hepatic proliferation are newly recognized clinical sequelae in patients with this syndrome.
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