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1996-01-30
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Document 0407
DOCN M9610407
TI T cell development in CD8-/- mice. Thymic positive selection is biased
toward the helper phenotype.
DT 9601
AU Bachmann MF; Oxenius A; Mak TW; Zinkernagel RM; Department of Pathology,
University of Zurich, Switzerland.
SO J Immunol. 1995 Oct 15;155(8):3727-33. Unique Identifier : AIDSLINE
MED/96003409
AB The CD4 and CD8 molecules are involved in T cell differentiation and
activation. Nevertheless, efficient thymic maturation of helper T cells
has been shown in the absence of the CD4 molecule. These CD4-deficient
helper T cells expressed alpha beta-TCR and were able to control
Leishmania infections and to mediate Ab class switch. Using mice
deficient for the CD8 alpha-chain, we investigated whether a similar
cytotoxic T cell population was generated in the absence of the CD8
coreceptor. A CD8-deficient cytotoxic T cell population corresponding to
the described CD4-deficient helper T cell population was virtually
absent both functionally and physically. These results support the idea
that thymic maturation is asymmetrical and strongly biased toward the
helper phenotype.
DE Animal Cell Differentiation/GENETICS/IMMUNOLOGY Cytotoxicity Tests,
Immunologic CD8-Positive T-Lymphocytes/*IMMUNOLOGY Flow Cytometry
Histocompatibility Antigens Class I/GENETICS Histocompatibility
Antigens Class II/GENETICS Isoantigens/GENETICS Lymphocyte
Transformation/IMMUNOLOGY Lymphocytic Choriomeningitis Virus/IMMUNOLOGY
Mice Mice, Inbred C57BL Mice, Mutant Strains Phenotype Support,
Non-U.S. Gov't T-Lymphocytes, Helper-Inducer/*IMMUNOLOGY Vesicular
Stomatitis-Indiana Virus/IMMUNOLOGY JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).