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1996-01-30
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Document 0174
DOCN M9610174
TI Apoptosis parallels lymphopoiesis in bone marrow transplantation and HIV
disease.
DT 9601
AU Donnenberg AD; Margolick JB; Beltz LA; Donnenberg VS; Rinaldo CR Jr;
University of Pittsburgh School of Medicine, Department of; Medicine,
PA, 15213 USA.
SO Res Immunol. 1995 Jan;146(1):11-21. Unique Identifier : AIDSLINE
MED/96053385
AB Apoptosis has been implicated in a variety of physiological processes
ranging from tissue modeling to deletion of autoreactive T lymphocytes
during thymic development. The recent finding that a large proportion of
peripheral T cells from HIV-infected subjects (corrected from subjects)
apoptose in culture raises an important issue: does this represent a
pathologic mechanism by which the virus disrupts the immune system, or a
normal physiologic response to virus-mediated T-cell loss? To study the
potential relationship between apoptosis and lymphopoiesis, we compared
apoptosis rates in unstimulated lymphocyte cultures from healthy
subjects, HIV+ gay men, and bone marrow transplant (BMT) recipients
undergoing immune reconstruction. BMT recipients were chosen because
they undergo massive regeneration of lymphocytes following marrow
ablation and graft infusion. The data obtained in BMT recipients
suggests that elevated apoptosis accompanies, and is the consequence of,
elevated lymphopoiesis. We also found a strong inverse relationship
between in vitro T-cell apoptosis rates and peripheral T-cell counts.
These results provide new interpretation for elevated apoptosis observed
in HIV-infected individuals--that it reflects increased T-cell turnover
consequent to virus-mediated destruction of CD4+ T-cells.
DE Apoptosis/*IMMUNOLOGY Bone Marrow Transplantation/*IMMUNOLOGY
Comparative Study CD4 Lymphocyte Count CD4-Positive
T-Lymphocytes/IMMUNOLOGY CD8-Positive T-Lymphocytes/IMMUNOLOGY
Hematopoiesis/*IMMUNOLOGY Human HIV Infections/BLOOD/*IMMUNOLOGY Male
Support, Non-U.S. Gov't Support, U.S. Gov't, P.H.S.
T-Lymphocytes/*IMMUNOLOGY JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).