Autoregulation of pituitary growth hormone messenger ribonucleic acid levels in rats bearing transplantable mammosomatotrophic pituitary tumors.


Female Wistar-Furth rats were implanted sc with GH3 rat pituitary tumor cells. Tumors were palpable by 4 weeks, and animals were killed periodically from 5-9 weeks. Tumor-bearing rats (n = 10) were heavier than their respective controls, reaching a weight of 372 +/- 3 by 9 weeks vs. 195 +/- 5 g in controls (mean +/- SE). Circulating serum GH levels… (More)


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