Diabetes Care, Vol 10, Issue 2 160-163, Copyright © 1987 by American Diabetes Association
Prolonged fasting hypoglycemia due to insulin antibodies in patient with non-insulin-dependent diabetes mellitus: effect of insulin withdrawal on insulin-antibody-binding kinetics
TW Van Haeften, BA Krom and JE Gerich
Fasting hypoglycemia, which persisted for 3 days after insulin treatment
was stopped, occurred in a patient with non-insulin-dependent diabetes
mellitus who had inappropriate plasma free-insulin levels (18-25 microU/ml)
and extremely high antibody-bound insulin (greater than 20,000 microU/ml)
but normal counter-regulatory hormone secretion and plasma C-peptide
levels. The amount of antibody-bound insulin decreased in a biphasic
pattern over 13 mo of observation with an initial half-life of 35 days and
a more gradual decrease with a half-life of 160 days. The number of
high-affinity antibody binding sites was virtually identical to the amount
of antibody-bound insulin in the patient's plasma. We conclude that the
patient's fasting hyperinsulinemia and hypoglycemia were due to release of
antibody-bound insulin.