{'fraction_non_alphanumeric': 0.0243531202435312, 'fraction_numerical': 0.0076103500761035, 'mean_word_length': 4.875, '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}}
Lack of preventive effect of 6-hydroxy-dopamine on a decrease of beta-adrenergic receptors induced by repeated stress in the heart of rats.

Immobilization stress (2.5 h daily) repeated daily for 7 days resulted in a significant decrease in the number of beta-adrenergic receptors in heart compared to control values. Administration of 6-hydroxy-dopamine failed to prevent the stress-induced reduction in the number of beta-adrenergic receptors in the heart of rats as compared to intact stressed rats. These results support the concept that beta-adrenergic receptors in the heart of rats are primarily under the control of the noradrenergic nervous system.