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TCR expression and clonality analysis in peripheral blood and lymph nodes of HIV-infected patients.

Abstract：

:We compared the T cell receptor (TCR) V beta gene family repertoire in peripheral blood mononuclear cells (PBMC) and lymph node (LN) cells from 7 human immunodeficiency virus (HIV)-infected patients and 3 seronegative healthy controls. Virtually all the V beta family specificities were represented in patient PBMC and LN cells, and mean values for each specificity were comparable to figures in seronegative controls. In 4 patients, however, some V beta gene segment transcripts were overrepresented in the LN compartment, compared to the peripheral blood counterpart. To ascertain whether this phenomenon was due to polyclonal or oligoclonal expansion of T cells bearing the relevant V beta gene product, we sequenced the entire CDR3 region of a panel of 238 PCR clones corresponding to the V beta transcripts expanded in LN; as control, the same regions were cloned and sequenced in patient's PBMC, and in PBMC and LN cells from seronegative individuals. This analysis disclosed preferential usage of J beta 2 genes in PBMC and LN cells from both seropositive patients and controls, regardless of the V beta gene segment considered, thus indicating that this skewness in the V beta-J beta repertoire could be a consistent feature of at least a part of the V beta repertoire in different lymphoid compartments, regardless of the pathologic conditions. In addition, in LN from HIV seropositive patients we found the presence of recurrent TCR rearrangements, accounting for 8-23% of the generated clones, in each of the 4 V beta specificities analyzed; recurrent sequences were not found in PBMC from patients nor in PBMC and LN cells from seronegative controls. These findings suggest that antigen-driven oligoclonal T cell expansions may occur in vivo in lymphoid organs of HIV seropositive patients.

journal_name

Hum Immunol

journal_title

Human immunology

authors

Mion M,Indraccolo S,Feroli F,Minuzzo S,Masiero S,Zamarchi R,Barelli A,Borri A,Chieco-Bianchi L,Amadori A

doi

10.1016/s0198-8859(97)00205-x

subject

Has Abstract

pub_date

1997-10-01 00:00:00

pages

93-103

issue

eissn

0198-8859

issn

1879-1166

pii

S0198-8859(97)00205-X

journal_volume

pub_type

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TCR expression and clonality analysis in peripheral blood and lymph nodes of HIV-infected patients.