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Document 0045
DOCN M9610045
TI Modulation of T-cell adhesion markers, and the CD45R and CD57 antigens
in human alcoholics.
DT 9601
AU Cook RT; Ballas ZK; Waldschmidt TJ; Vandersteen D; LaBrecque DR; Cook
BL; Department of Pathology, Veteran's Affairs Medical Center, Iowa;
City, Iowa 52246, USA.
SO Alcohol Clin Exp Res. 1995 Jun;19(3):555-63. Unique Identifier :
AIDSLINE MED/96028359
AB Direct and indirect evidence indicates that T cells are altered in
alcoholics. The most commonly reported changes under direct examination
have been consistent with an increased level of activation as reflected
by shifts in the ratio of common leukocyte antigen isoforms expressed at
the cell surface, by increases in the expression of class II antigen, or
by alterations in the expression of various adhesion molecules.
Functional evidence for T-cell abnormality includes loss of delayed
hypersensitivity and a number of findings attributed to dysregulation of
B cells by alcoholic T cells; these include the widely reported
distrubances of immunoglobulin production in vivo and a range of
abnormal responses when T and B cells are combined in vitro. Detailed
flow cytometric examination of T cells from alcoholics with or without
active liver disease reveals a significant loss of L-selectin CD8+ T
cells, but not usually of CD4+ T cells. There is an inverse increase in
the expression of CD11b on the CD8+ cells that have decreased
L-selectin+ percentages. Both CD8+ and CD4+ T cells in alcoholics
display a significant loss of the CD45RA isoform and a gain of cells
exhibiting the CD45RO isoform. Other surface alterations include
increased expression of CD57, a marker most commonly associated on T
cells with conditions of chronic increased antigenic exposure. It is
argued that these and other T-cell alterations in alcoholics are
cytokine-driven in part and result in T-cell differentiation states that
are functionally inappropriate.(ABSTRACT TRUNCATED AT 250 WORDS)
DE Adult Alcoholism/*IMMUNOLOGY Antigens, CD45/*ANALYSIS Antigens,
CD57/*ANALYSIS Cell Adhesion/*IMMUNOLOGY Cytokines/PHYSIOLOGY CD4
Lymphocyte Count CD4-Positive T-Lymphocytes/IMMUNOLOGY CD8-Positive
T-Lymphocytes/IMMUNOLOGY Female Flow Cytometry Hepatitis,
Alcoholic/IMMUNOLOGY Human Immunophenotyping Liver Diseases,
Alcoholic/IMMUNOLOGY Liver Function Tests Male Middle Age Support,
Non-U.S. Gov't Support, U.S. Gov't, Non-P.H.S. Support, U.S. Gov't,
P.H.S. T-Lymphocytes/DRUG EFFECTS/*IMMUNOLOGY JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).