title: A survey of human leukaemias for sequences of a human retrovirus.
abstract: Human T-cell leukaemia-lymphoma virus (HTLV) is an exogenous human retrovirus distinct from all known animal retroviruses. HTLV is closely linked to a subtype of adult T-cell malignancies and except for isolated cases, has not been found associated with any other form of leukaemia, lymphoma or other cancers (see refs 1, 2 for review). HTLV can be transmitted to cord blood T lymphocytes in vitro and the infected cells exhibit characteristics of transformed neoplastic T cells. We have recently cloned DNA sequences derived from approximately 1 kilobase (kb) of the 5' and 3' termini of the HTLV genome, as well as a 4-5-kb defective HTLV provirus flanked by cellular sequences. The availability of these probes has enabled us to carry out a limited survey of different fresh or cultured cells from patients of different lymphoid and myeloid malignancies for HTLV-related DNA sequences. The results presented here show that cells from all Japanese patients with adult T-cell leukaemia and several patients with various mature T-cell malignancies from elsewhere contained one or more copies of a highly conserved HTLV genome. The infected cells are of clonal origin. Fresh cells from 1 of the 10 myeloid leukaemic patients contained exogenous DNA sequences distantly related to HTLV.
mesh_terms: D001483:Base Sequence; D002460:Cell Line; D004273:DNA, Neoplasm / Q000302:isolation & purification*; D004279:DNA, Viral / Q000302:isolation & purification*; D005814:Genes, Viral; D006801:Humans; D007938:Leukemia / Q000235:genetics / Q000382:microbiology*; D010957:Plasmids; D012190:Retroviridae / Q000235:genetics* / Q000302:isolation & purification
chemical_list: D004273:DNA, Neoplasm; D004279:DNA, Viral