Close Association Between Interleukin 2 Receptor MRNA Expression and Human T Cell Leukemia/lymphoma Virus Type I Viral RNA Expression in Short-term Cultured Leukemic Cells from Adult T Cell Leukemia Patients
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Human T cell leukemia/lymphoma (T-lymphotropic) virus type I (HTLV-I) infection has been considered to be closely associated with the leukemogenesis of adult T cell leukemia (ATL), in which interleukin 2 (IL-2) receptors are abnormally expressed. In this study, however, Southern blot analysis revealed no gross rearrangement or obvious amplification of the IL-2 receptor gene in ATL leukemic cells, indicating that abnormal IL-2 receptor expression in ATL is not due to the structural change of its gene. Hence, we studied the expression of the IL-2 receptor and HTLV-I at the RNA level during short-term cultures of leukemic cells from 9 ATL patients. Cytoplasmic dot hybridization and Northern hybridization revealed that fresh leukemic cells from seven of nine patients expressed a small amount of IL-2 receptor mRNA but HTLV-I RNA was undetectable in all cases. After cultures for up to 7 d, both IL-2 receptor mRNA and HTLV-I RNA (including pX message) expression concomitantly increased, whereas the amounts of other cellular genes, except for beta-actin, did not. The increases in their RNA expression were inhibited by early addition (within 12 h after the beginning of the culture) of cycloheximide, indicating that these increases are mediated by newly synthesized protein(s). These results strongly suggested that IL-2 receptor expression is closely associated with HTLV-I expression in leukemic cells from ATL patients.
Seki Y, Kitamura T, Tezuka K, Murata M, Akari H, Hamaguchi I Viruses. 2022; 14(4).
PMID: 35458470 PMC: 9030509. DOI: 10.3390/v14040740.
Mizuguchi M, Takahashi Y, Tanaka R, Fukushima T, Tanaka Y Pathogens. 2020; 9(2).
PMID: 32012672 PMC: 7168584. DOI: 10.3390/pathogens9020082.
Tezuka K, Okuma K, Kuramitsu M, Matsuoka S, Tanaka R, Tanaka Y J Virol. 2017; 92(4).
PMID: 29212930 PMC: 5790936. DOI: 10.1128/JVI.01885-17.
Kinpara S, Hasegawa A, Utsunomiya A, Nishitsuji H, Furukawa H, Masuda T J Virol. 2009; 83(10):5101-8.
PMID: 19264779 PMC: 2682107. DOI: 10.1128/JVI.02564-08.
Koga H, Imada K, Ueda M, Hishizawa M, Uchiyama T Cancer Sci. 2004; 95(5):411-7.
PMID: 15132768 PMC: 11159125. DOI: 10.1111/j.1349-7006.2004.tb03224.x.