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We have previously described a group of young females with virilization, acanthosis nigricans, insulin resistance, and markedly decreased binding of insulin to its receptor (syndrome of insulin resistance and acanthosis nigricans type A). The present report concerns a 15-yr-old female with clinical features indistinguishable from the type A patients, including virilization, acanthosis nigricans, and extreme resistance to endogenous and exogenous insulin. Insulin levels were 400-650 microU/ml while fasting and were over 2200 microU/ml when stimulated. Proinsulin was less than 10% of the total immunoassayable insulin. In distinct contrast to the type A patients, insulin receptors on cells from this patient were entirely normal on the basis of specificity, negative cooperativity, affinity, concentration, and interaction with antiinsulin receptor antibodies. These findings suggest the presence of an intracellular defect as the cause of the observed insulin resistance.
R S Bar, and
M Muggeo, and
J Roth, and
C R Kahn, and
J Havrankova, and
J Imperato-McGinley
October 1990,
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R S Bar, and
M Muggeo, and
J Roth, and
C R Kahn, and
J Havrankova, and
J Imperato-McGinley
March 1986,
Lancet (London, England),
R S Bar, and
M Muggeo, and
J Roth, and
C R Kahn, and
J Havrankova, and
J Imperato-McGinley
July 1982,
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R S Bar, and
M Muggeo, and
J Roth, and
C R Kahn, and
J Havrankova, and
J Imperato-McGinley
February 1982,
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R S Bar, and
M Muggeo, and
J Roth, and
C R Kahn, and
J Havrankova, and
J Imperato-McGinley
January 1982,
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R S Bar, and
M Muggeo, and
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C R Kahn, and
J Havrankova, and
J Imperato-McGinley
January 1986,
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R S Bar, and
M Muggeo, and
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C R Kahn, and
J Havrankova, and
J Imperato-McGinley
January 1964,
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R S Bar, and
M Muggeo, and
J Roth, and
C R Kahn, and
J Havrankova, and
J Imperato-McGinley
May 1984,
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R S Bar, and
M Muggeo, and
J Roth, and
C R Kahn, and
J Havrankova, and
J Imperato-McGinley
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R S Bar, and
M Muggeo, and
J Roth, and
C R Kahn, and
J Havrankova, and
J Imperato-McGinley
July 1986,
The American journal of medicine,
