Radiophosphorus Uptake by Normal, Hyperplastic, and Tumorous Mammary Tissues of Mice.

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Abstract
The hyperplastic nodule of the nonpregnant multiparous C3H/He mouse mammary gland shows a p32 uptake intermediate between that of normal and tumorous mammary tissue. The relative p32 incorporation (tumor > hyperplastic nodule > normal) was not appreciably affected by any of a series of endocrine manipulations (ovariectomy; androgen, estrogen, or cortisol administration). However, during the second half of pregnancy, the uptake by both normal and hyperplastic tissues increases.