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M9490124.TXT
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1994-09-03
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Document 0124
DOCN M9490124
TI Clinical importance of extraordinary integration patterns of human
T-cell lymphotropic virus type I proviral DNA in adult T-cell
leukemia/lymphoma.
DT 9411
AU Shimamoto Y; Suga K; Shibata K; Matsuzaki M; Yano H; Yamaguchi M;
Department of Internal Medicine, Saga Medical School, Japan.
SO Blood. 1994 Aug 1;84(3):853-8. Unique Identifier : AIDSLINE MED/94318962
AB The proviral DNA of human T-cell lymphotrophic virus type I (HTLV-I) is
known to be integrated monoclonally in the malignant cells of adult
T-cell leukemia/lymphoma (ATL), which is a peripheral T-cell malignancy
caused by this virus. We studied the relationship between the
integration patterns of HTLV-I and clinical characteristics in 89
patients with ATL. The proviral DNA of HTLV-I was examined by the
standard Southern blot analysis using the endonucleases EcoRI and Pst I.
One clear band of greater than 9 kb was detected in most of the patients
(83 case) when cellular DNA was digested with EcoRI. On the other hand,
extraordinary integration patterns of HTLV-I proviral DNA were detected
in 6 patients; 3 of them showed two bands, while the other 3 showed one
band smaller than 9 kb. When cellular DNA was digested with PstI, the
band patterns of these patients were quite different from those of
typical patients. The patients with the extraordinary integration
patterns had clinical characteristics dissimilar to those of the other
83 patients with the ordinary integration pattern. The patients with two
bands by EcoRI digestion always had severe hypoxemia with extremely high
levels of serum lactate dehydrogenase at first presentation and showed
peculiar organ infiltrations, such as retina and muscle, which were less
frequent in the other ordinary 83 patients. They all died within 8
months after the onset. In contrast, the patients with one smaller band
by EcoRI digestion always had small and mature T lymphocytes with
bilobulated nuclei without lymphadenopathy and showed a favorable
clinical course, which was uncommon in the ordinary cases. They were
alive 20 to 38 months after diagnosis. Rearranged bands of the T-cell
receptor gene were detected in all patients with unusual integration.
These findings indicate that the integration patterns of HTLV-I proviral
DNA have a clinical implication and may be one of the explanations for
heterogeneity in the behavior of this disease.
DE DNA, Viral/*GENETICS/METABOLISM Female Gene Rearrangement,
B-Lymphocyte Human HTLV-I/*GENETICS Leukemia, T-Cell/*MICROBIOLOGY
Male Proviruses Restriction Mapping Support, Non-U.S. Gov't Virus
Integration JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).