Hormonal Modulation of α 2u Globulin mRNA: Sequence Measurements Using a Specific cDNA Probe

  1. P. Feigelson and
  2. D. T. Kurtz
  1. The Institute of Cancer Research and the Department of Biochemistry, College of Physicians and Surgeons, Columbia University, New York, New York 10032

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Excerpt

α 2u Globulin is a protein of m.w. 20,000, which is synthesized in the liver of mature male rats, secreted into the serum, and excreted in the urine. This protein represents approximately 1% of hepatic protein synthesis in an adult male rat, and no detectable α 2u globulin synthesis occurs in females (Sippel et al. 1976). Our interest in this protein is based on the fact that its rate of hepatic biosynthesis is under multihormonal control: androgens, glucocorticoids, thyroid hormones, and pituitary growth hormone are necessary to maintain normal levels of α 2u globulin synthesis in male rats, and estrogens repress the synthesis of this protein (Sippel et al. 1975; Kurtz et al. 1976a,b). α 2u Globulin can be induced in female rats by ovariectomy and androgen administration (Sippel et al. 1975). Using a wheat-germ cell-free translation system, we have quantitated the level of translationally functional α 2u globulin Mrna...

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