{'fraction_non_alphanumeric': 0.03129890453834116, 'fraction_numerical': 0.010954616588419406, 'mean_word_length': 5.4646464646464645, '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}}
Effect of histamine-receptor blocking on human spontaneous lymphocyte-mediated cytotoxicity.

The effect of H1- and h2-receptor-blocking agents on spontaneous lymphocyte-mediated cytotoxicity (SLMC) was studied. The H1-receptor blocker clemastinum and the H2-receptor blocker cimetidine inhibited the spontaneous cytotoxic activity of normal human peripheral blood lymphocytes on K-562 target cells dose-dependently. The inhibition cannot be explained either by a direct toxic effect on natural killer (NK) cells or by blocking of Fc receptors. The possible involvement of histamine receptor-bearing lymphocytes in human SLMC is suggested.