Purification of the Insulin-like growth factor II (IGF-II) receptor from an IGF-II-producing cell line, and generation of an antibody which both immunoprecipitates and blocks the type 2 IGF receptor
Copyright policy )Purification of the Insulin-like growth factor II (IGF-II) receptor from an IGF-II-producing cell line, and generation of an antibody which both immunoprecipitates and blocks the type 2 IGF receptor
18,54-SF cells, which secrete rat insulin-like growth factor II (rIGF-II), have abundant type 2 IGF receptors. We have purified the type 2 receptor from these cells by solubilization of crude membranes in Triton X-100, followed by chromatography on agarose-immobilized rIGF-II. A partially purified receptor preparation, obtained by chromatography of solubilized membranes over wheat germ agglutinin, was used to immunize a rabbit. The antibody generated both immunoprecipitates the type 2 receptor, and specifically inhibits IGF-II binding to a variety of rat tissues, including 18,54-SF cells, BRL-3A cells and placenta. The presence of abundant type 2 receptors on an rIGF-II-secreting cell line is consistent with an autocrine role for IGF-II in select cells.
- Stanford University United States
Octoxynol, Wheat Germ Agglutinins, Receptors, Cell Surface, Receptors, Somatomedin, Antibodies, Chromatography, Affinity, Cell Line, Polyethylene Glycols, Kinetics, Solubility, Lectins, Humans, Electrophoresis, Polyacrylamide Gel, Insulin-Like Growth Factor I
Octoxynol, Wheat Germ Agglutinins, Receptors, Cell Surface, Receptors, Somatomedin, Antibodies, Chromatography, Affinity, Cell Line, Polyethylene Glycols, Kinetics, Solubility, Lectins, Humans, Electrophoresis, Polyacrylamide Gel, Insulin-Like Growth Factor I
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