Late Postprandial Hypoglycemia Due To Bioactive Insulin Dissociation From Autoantibody Leading To Unconsciousness In A Patient With Insulin Autoimmune Syndrome
INTERNAL MEDICINE(2011)
摘要
We report here the case of an 83-year-old man who was treated for unconsciousness and hypoglycemia (39 mg/dL) accompanied by marked elevation of serum immunoreactive insulin (IRI) (4,760 mu IU/mL). We diagnosed his condition as insulin autoimmune syndrome (IAS, Hirata disease) because of a high insulin autoantibody (IAA) titer (> 90%: bound/total) and no history of exogenous insulin administration. Reactive hypoglycemia occurred due to immediate association followed by dissociation between insulin and insulin autoantibodies after glucose or food intake. An alpha-glucosidase inhibitor in combination with frequent small meals reduced the postprandial hyperglycemia (glucose spike) and ameliorated the reactive hypoglycemia.
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关键词
insulin autoimmune syndrome, IAA, HLA, alpha-glucosidase inhibitor
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