Defective provirus form of human T-cell leukemia virus type I in adult T-cell leukemia/lymphoma : clinicopathological features

Human T-cell leukemia virus type I (HTLV-I) is associated with adult T-cell leukemia/lymphoma (ATLL). To examine the relationship between defective HTLV-I proviruses and clinicopathological features, we examined 95 patients with ATLL showing clonal integration of HTLV-I proviral DNA; 77 patients (81...

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Bibliographic Details
Published in:Cancer research (Chicago, Ill.) Ill.), 1991-09, Vol.51 (17), p.4639-4642
Main Authors: OHSHIMA, K, KIKUCHI, M, MASUDA, Y.-I, KOBARI, S, SUMIYOSHI, Y, EGUCHI, F, MOHTAI, H, YOSHIDA, T, TAKESHITA, M, KIMURA, N
Format: Article
Language:English
Subjects:
Amino Acid Sequence
Biological and medical sciences
Defective Viruses - genetics
DNA, Viral - analysis
Hematologic and hematopoietic diseases
Humans
Immunophenotyping
Leukemia, T-Cell - classification
Leukemia, T-Cell - genetics
Leukemia, T-Cell - microbiology
Leukemias. Malignant lymphomas. Malignant reticulosis. Myelofibrosis
Lymphoma - classification
Lymphoma - genetics
Lymphoma - microbiology
Medical sciences
Molecular Sequence Data
Phenotype
Polymerase Chain Reaction
Proviruses - genetics
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Summary:Human T-cell leukemia virus type I (HTLV-I) is associated with adult T-cell leukemia/lymphoma (ATLL). To examine the relationship between defective HTLV-I proviruses and clinicopathological features, we examined 95 patients with ATLL showing clonal integration of HTLV-I proviral DNA; 77 patients (81%) showed 1 clonal band, 15 (16%) showed 2 clonal bands, and 3 (3%) showed 3 clonal bands. In addition, the defective proviral form was detected in 28 patients (29%): 23 (30%) of the 77 with 1 clonal band, 4(27%) of the 15 with 2 clonal bands, and 1(33%) of the 3 with 3 clonal bands. The numbers of clonal bands had no association with the presence of defective proviruses. We classified the 95 patients with ATLL into four types according to clinicopathological features (smoldering leukemia, chronic leukemia, acute leukemia, and lymphoma types). The distribution of patients with the defective form was not different among these four types. The HTLV-I genomes must have integrated into the human genome DNA and been deleted partially in the cells. The defective form was kept during the clinical stage. All patients with the defective form showed defect of the gag or/and env region. No patient had a defect of the pX region. These data suggest that the pX region of HTLV-I must have played an important role in ATLL genesis.
ISSN:0008-5472
1538-7445