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1996-02-27
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Document 0008
DOCN M9630008
TI High frequency of CD45RO expression in AIDS-related B-cell non-Hodgkin's
lymphomas.
DT 9603
AU Gloghini A; De Paoli P; Gaidano G; Franceschi S; Carbone A; Division of
Pathology, Istituto Nazionale di Ricovero e Cura a; Carattere
Scientifico, Aviano, Italy.
SO Am J Clin Pathol. 1995 Dec;104(6):680-8. Unique Identifier : AIDSLINE
MED/96105176
AB Although immunophenotypic abnormalities have been reported in B-cell
non-Hodgkin's lymphomas (NHLs) occurring in the general population,
there are no extensive studies on such abnormalities in AIDS-related
B-cell NHLs. Reactivity of CD45RO/UCHL1 and expression of other T-cell
associated antigens (CD43, OPD4, CD3, CD5, EMA) were examined by
immunohistochemistry in 66 diffuse aggressive AIDS-related B-cell NHLs
and in 296 AIDS-unrelated B-cell NHLs of similar morphology analyzed in
the same institution. EBER in situ hybridization studies were also
carried out in 57 of the 66 AIDS-related B-cell NHLs investigated.
CD45RO/UCHL1 was expressed in 27% of AIDS-related B-cell NHLs, but only
in 8% of diffuse aggressive AIDS-unrelated B-cell NHLs. The difference
was highly significant (P < .001) overall and, within the Working
Formulation subtypes, especially marked among small noncleaved cell
(SNCC) lymphomas. Conversely, the reactivity of other T-cell associated
antigens seemed to be very similar in AIDS-related and AIDS-unrelated
NHLs. However, for CD43, a significantly lower number of positive cases
was found in AIDS-related NHLs among SNCC lymphomas. Among AIDS-related
B-cell NHLs, the highest frequency of CD45RO/UCHL1 expression was found
in the immunoblastic subset with plasmacytoid differentiation. In the
latter CD45RO/UCHL1 preferentially associated with EMA expression and
EBV infection of the tumor clone, but not with CD45RA. The present
finding of an excess of CD45RO/UCHL1 expression in AIDS-related B-cell
lymphomas may reflect the preferential expansion of CD45RO expressing
B-cell clones with putative autoreactive potential, as suggested by the
expansion of CD45RO expressing B-cells in autoimmune disorders.
DE Antibodies, Monoclonal Antigens, CD45/*ANALYSIS Comparative Study
Human Lymphoma, AIDS-Related/*IMMUNOLOGY/PATHOLOGY Lymphoma,
Non-Hodgkin's/*IMMUNOLOGY/PATHOLOGY Support, Non-U.S. Gov't JOURNAL
ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).