PMID- 6096637 OWN - NLM STAT- MEDLINE DCOM- 19850211 LR - 20190825 IS - 0145-2126 (Print) IS - 0145-2126 (Linking) VI - 8 IP - 6 DP - 1984 TI - Differential methylation of class I histocompatibility antigen genes in T-cell lines derived from two different types of T-cell malignancies. PG - 965-73 AB - We have previously shown that two human T-cell lines (HSB and 8402) derived from patients with childhood T-cell ALL (T-ALL) do not synthesize detectable mRNA for HLA-DR alpha. The DR alpha genes in both cell lines are hypermethylated relative to the same genes in T-cell lines infected with human T-cell leukemia virus (HTLV) and derived from patients with adult T-cell leukemia/lymphoma (ATL). These latter cell lines do express HLA-DR alpha-mRNA, as well as HLA-DR surface antigens. We report here that the genes for HLA class I antigens are also highly methylated in the T-ALL T-cell lines relative to the same genes in the ATL T-cell lines, normal peripheral blood T cells, and autologous normal B-cell lines. In spite of substantial differences in the extent of methylation of class I-related genes, no obvious differences exist among these cell types in their levels of expression of HLA-A and -B antigens. The data clearly indicate, however, that the class I and class II components of the major histocompatibility complex are unusually hypermethylated in several T-ALL-derived cell lines, while ATL T-cell lines do not substantially differ in this respect from normal peripheral blood T-cells. FAU - Clarke, M F AU - Clarke MF FAU - Mann, D L AU - Mann DL FAU - Murray, C AU - Murray C FAU - Reitz, M S AU - Reitz MS LA - eng PT - Journal Article PL - England TA - Leuk Res JT - Leukemia research JID - 7706787 RN - 0 (DNA, Neoplasm) RN - 0 (HLA-DR Antigens) RN - 0 (Histocompatibility Antigens Class II) RN - 0 (RNA, Messenger) SB - IM MH - Acute Disease MH - Cell Line MH - DNA, Neoplasm/*metabolism MH - Deltaretrovirus MH - HLA-DR Antigens MH - Histocompatibility Antigens Class II/*genetics MH - Humans MH - Leukemia/*immunology MH - Lymphoma/immunology MH - Methylation MH - RNA, Messenger/analysis MH - *T-Lymphocytes EDAT- 1984/01/01 00:00 MHDA- 1984/01/01 00:01 CRDT- 1984/01/01 00:00 PHST- 1984/01/01 00:00 [pubmed] PHST- 1984/01/01 00:01 [medline] PHST- 1984/01/01 00:00 [entrez] AID - 10.1016/0145-2126(84)90050-x [doi] PST - ppublish SO - Leuk Res. 1984;8(6):965-73. doi: 10.1016/0145-2126(84)90050-x.