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Human T-cell leukemia virus type I and adult T-cell leukemia

机译:I型人T细胞白血病病毒和成人T细胞白血病

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Human T-cell leukemia virus type I (HTLV-I) causes adult T-cell leukemia (ATL) in about 5% of carriers after a long latent period. After its infection, HTLV-I promotes the clonal proliferation of HTLV-I infected cells in vivo by actions of encoded viral proteins, including Tax. However, leukemic cells frequently lack the expression of Tax by the genetic and epigenetic changes of HTLV-I provirus, suggesting that Tax is not always necessary after transformation. Alternatively, ATL cells without Tax protein could escape from the host immune system since Tax is the major target of cytotoxic lymphocytes. During the latent period, alterations of host genome accumulate, finally leading to onset of ATL.
机译:I型人T细胞白血病病毒(HTLV-1)经过长时间潜伏期后,会在约5%的携带者中引起成人T细胞白血病(ATL)。感染后,HTLV-1通过编码的病毒蛋白(包括Tax)的作用在体内促进HTLV-1感染细胞的克隆增殖。然而,由于HTLV-1原病毒的遗传和表观遗传变化,白血病细胞经常缺乏Tax的表达,这表明转化后并不总是需要Tax。另外,由于Tax是细胞毒性淋巴细胞的主要靶标,因此不含Tax蛋白的ATL细胞可以逃脱宿主免疫系统。在潜伏期,宿主基因组的改变积累,最终导致ATL的发作。

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