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1996-02-26
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Document 0728
DOCN M9620728
TI Spontaneous proliferation of memory (CD45RO+) and naive (CD45RO-)
subsets of CD4 cells and CD8 cells in human T lymphotropic virus (HTLV)
infection: distinctive patterns for HTLV-I versus HTLV-II.
DT 9602
AU Prince HE; York J; Owen SM; Lal RB; American Red Cross Blood Services,
Southern California Region,; Los Angeles.
SO Clin Exp Immunol. 1995 Nov;102(2):256-61. Unique Identifier : AIDSLINE
MED/96069872
AB Spontaneous lymphocyte proliferation (SLP) in vitro is a characteristic
feature of about 50% of individuals infected with HTLV-I or HTLV-II.
Both CD4 cells and CD8 cells contribute to SLP in HTLV-I infection,
whereas SLP in HTLV-II infection is usually restricted to CD8 cells. In
this study, we asked if SLP was restricted to the memory (CD45RO+) cell
subset of CD4 and CD8 cells in HTLV infection. Purified CD4 and CD8
cells were separated into CD45RO+ and CD45RO- populations by a modified
panning technique, and spontaneous proliferation (SP) of the cell
subsets was assessed. For all five HTLV-I-infected persons whose
mononuclear cell cultures were SLP+, only CD45RO+ cells, but not CD45RO-
cells, within CD4 and CD8 subsets showed SP. In contrast, five of six
SLP+ HTLV-II+ individuals showed SP in both the CD45RO+ and the CD45RO-
subsets of CD4 cells, and 10 of 12 SLP+ HTLV-II+ individuals showed SP
of both the CD45RO+ and CD45RO- subsets of CD8 cells. Polymerase chain
reaction studies showed that proviral genome was generally present in
both CD45RO+ and CD45RO- subsets of CD4 and CD8 cells, regardless of
HTLV type and SP activity. These findings show that SP of both CD4 and
CD8 cells in HTLV-I infection is usually restricted to CD45RO+ memory
cells, whereas in HTLV-II infection, both CD45RO+ memory and CD45RO-
naive subsets of CD4 and CD8 cells may exhibit SP. It thus appears that
HTLV-I infection and HTLV-II infection exhibit distinctive dysregulatory
effects on memory and naive T cell subpopulations.
DE Antigens, CD45/*METABOLISM CD4-Positive T-Lymphocytes/*IMMUNOLOGY
CD8-Positive T-Lymphocytes/*IMMUNOLOGY Flow Cytometry Human
HTLV-I/*IMMUNOLOGY HTLV-I Infections/*IMMUNOLOGY HTLV-II/*IMMUNOLOGY
HTLV-II Infections/*IMMUNOLOGY *Immunologic Memory *Lymphocyte
Transformation T-Lymphocyte Subsets/*IMMUNOLOGY JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).