Acanthosis nigricans, hirsutism, insulin resistance and insulin receptor defect.

Abstract:

:A 24-year-old negress with the triad of acanthosis nigricans, hirsutism associated with polycystic ovaries and insulin resistance is reported. Metabolic studies were done 3 years after a bilateral ovarian wedge resection. Partial remission of the hirsutism and return of menstrual cycles occurred after surgery. Extreme resistance to endogenous and exogenous insulin was observed. Three studies of insulin receptors on circulating red blood cells (RBC) showed abnormal inhibition-competition curves, characterized by increased percentage insulin binding at higher unlabelled insulin levels. Scatchard plots suggested an apparent increase in the number of low affinity receptors. Despite the changes in receptor-insulin interaction, the defect does not seem to explain the insulin resistance since binding of insulin to a target tissue (RBC) appeared to be quantitatively normal at physiological insulin levels, suggesting a simultaneous post receptor defect.

journal_name

Clin Endocrinol (Oxf)

journal_title

Clinical endocrinology

authors

Leme CE,Wajchenberg BL,Lerário AC,Goldman J,Borges JL

doi

10.1111/j.1365-2265.1982.tb02632.x

subject

Has Abstract

pub_date

1982-07-01 00:00:00

pages

43-9

issue

1

eissn

0300-0664

issn

1365-2265

journal_volume

17

pub_type

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