{'fraction_non_alphanumeric': 0.024853801169590642, 'fraction_numerical': 0.005847953216374269, 'mean_word_length': 4.956521739130435, '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 HTLV-1 gene expression and its relevance to proliferation of the infected cells].

Proliferation of HTLV-1 after infection is one of the crucial steps that affects development of adult T cell leukemia. In addition, one of the regulatory factors, tax protein, activates not only viral transcription from the LTR but also transcription of genes coding IL-2 and IL-2 receptor and eventually supposed to induce proliferation of infected T cells. However, expression of tax protein is regulated negatively by another viral regulatory factor, rex protein, in a novel fashion. The process of ATL development is discussed in relation to the regulation of viral gene expression.