Abstract:
:An optimal antitumoral immune response requires the participation of both CD8 and CD4 T lymphocytes, which are activated by peptide antigen presentation via human leucocyte antigen (HLA) class I and class II molecules respectively. Loss of HLA molecules has been observed in different malignancies, and provides a mechanism for escape from immune surveillance. Furthermore, HLA-G, a class Ib molecule, is considered to be an immune tolerance-inducing molecule. HLA-G expression on tumour cells could provide a further mechanism for immune escape. To determine the frequency and the pattern of HLA defects in non-Hodgkin lymphomas (NHL), HLA expression was prospectively studied in 614 NHL cases, using flow cytometry. Furthermore, HLA-G expression was tested in 50 cases, including 20 cases selected on the basis of their defective HLA class I expression. In 64 cases (10.4%), lymphomatous cells exhibited lower HLA class I mean fluorescence intensity compared with reactive cells. Their characteristics were (1) the diversity of histological entities; (2) the significant frequency of relapse or transformation; (3) the increased incidence of high-grade NHL compared with low-grade; and (4) the severity of the class I defect in 50% of the cases, mainly in high-grade NHL. A defect in HLA-DR expression was always associated with a severe class I defect (12 cases; 2%). The HLA-G protein was detected in three class I defective cases. These HLA alterations frequently appeared as a secondary event at relapse or at transformation, suggesting a direct role in lymphomagenesis.
journal_name
Br J Haematoljournal_title
British journal of haematologyauthors
Drénou B,Le Friec G,Bernard M,Pangault C,Grosset JM,Lamy T,Fauchet R,Amiot Ldoi
10.1046/j.1365-2141.2002.03814.xsubject
Has Abstractpub_date
2002-11-01 00:00:00pages
417-24issue
2eissn
0007-1048issn
1365-2141pii
3814journal_volume
119pub_type
杂志文章abstract::The haematological and immunological characteristics of 34 healthy anti-HTLV-I antibody-positive individuals (HTLV-I carriers) in southwestern Japan were examined. No significant difference was noted between carriers and the controls in counts of RBC, WBC and the absolute number of lymphocytes. The serum IgG in the ca...
journal_title:British journal of haematology
pub_type: 杂志文章
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journal_title:British journal of haematology
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pub_type: 杂志文章
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journal_title:British journal of haematology
pub_type: 杂志文章
doi:10.1111/j.1365-2141.1983.tb07306.x
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pub_type: 杂志文章
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更新日期:1991-03-01 00:00:00
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journal_title:British journal of haematology
pub_type: 杂志文章
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更新日期:1990-01-01 00:00:00
abstract::Allogeneic stem cell transplantation (alloSCT) is a curative procedure for myelofibrosis. Elderly people are mainly affected, limiting the feasibility of myeloablative regimens. The introduction of reduced-intensity conditioning (RIC) made alloSCT feasible for older patients. Nevertheless, the incidence of myelofibros...
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