{'fraction_non_alphanumeric': 0.032175032175032175, 'fraction_numerical': 0.006435006435006435, 'mean_word_length': 4.938931297709924, '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}}
Regulation of the immune response--role of the macrophage.

MACROPHAGES facilitate a variety of thymus-dependent immunologic phenomena in human beings and laboratory animals; thus, these cells are essential for the development of cellular and humoral immunocompetence.1 ,1a Their role in T-cell and B-cell function is shown schematically in Figure 1. Macrophages serve at least four distinct but interlocking functions in host defense. First of all, the induction of T-lymphocyte proliferation requires the physical association of the T cells with macrophages bearing antigen.1b Secondly, the macrophage is a principal site of control by the immune-response gene.2 Thirdly, macrophages have several plasma-membrane receptors, such as those for the Fc portion of IgG, that . . .