{'fraction_non_alphanumeric': 0.030837004405286344, 'fraction_numerical': 0.014977973568281937, 'mean_word_length': 4.651741293532338, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Influence of nursing on the release of prolactin and GH in mice with high and low incidence of mammary tumors.

The present experiments were designed to compare the release of prolactin (PRL) and GH in response to nursing in a mammary tumor susceptible (C3H/St) and a tumor-resistant strain (C57BL/St) of mice using radioimmunoassay techniques. In addition, the influence of nursing on GH release in the rat was also investigated. Prolactin was released in great quantities in mice of both strains, with the concentration in serum rising by 5-10-fold after 30 min of nursing.However, serum PRL concentrations after nursing were generally lower in C3H/St mice than C57BL/St mice, even though the former depleted significantly more (∼40%) PRL from the pituitary gland in 1 hr of nursingthan the latter. The data suggest greater PRL metabolism by C3H/St than C57BL/St mice. Ergot compounds successfully blocked nursinginduced PRL release in mice of both strains. In contrast to PRL, the concentration of GH in serum usually decreased or remained unchanged alter nursing in mice of both strains and in rats. It made no difference whethe...