Cell surface alteration in Epstein-Barr virus-transformed cells from patients with extreme insulin resistance.

Gorden DL, Robert A, Moncada VY, Taylor SI, Mühlhauser J, Carpentier JL
Diabetes. 1990 39 (8): 924-7

PMID: 2165004 · DOI:10.2337/diab.39.8.924

An abnormality was detected in the morphology of the cell surface of Epstein-Barr virus-transformed lymphocytes of patients with genetic forms of insulin resistance. In cells from two patients with leprechaunism and two patients with type A extreme insulin resistance, scanning electron microscopy demonstrated a decrease in the percentage of the cell surface occupied by microvilli in cells from the patients with leprechaunism and type A insulin resistance compared with control cells. When cells from a healthy control subject and one of the patients with leprechaunism (Lep/Ark-1) were incubated with 125I-labeled insulin, there was a decrease in the percentage of 125I-insulin associated with microvilli on the cell surface. Thus, the decreased localization of insulin receptors with the microvillous region of the cell surface was in proportion to the decrease in microvilli.

MeSH Terms (13)

Autoradiography Cell Membrane Cell Transformation, Viral Female Herpesvirus 4, Human Humans Insulin Insulin Resistance Iodine Radioisotopes Lymphocytes Microscopy, Electron Microscopy, Electron, Scanning Microvilli

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