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Document 3205
DOCN M94A3205
TI Primary antibody response of human lymphocytes from SCID-hu mice
injected with HIV1 peptides.
DT 9412
AU Touraine JL; Chargui J; Desgranges C; Transplantation & Clinical
Immunology Unit, INSERM U80, Lyon,; France.
SO Int Conf AIDS. 1994 Aug 7-12;10(1):129 (abstract no. PA0135). Unique
Identifier : AIDSLINE ICA10/94369370
AB OBJECTIVE: Severe combined immunodeficiency (SCID) mice can be
transplanted with human lymphocytes (hu-PBL-SCID) or with human fetal
liver, thymus and bone fragments (SCID-hu), thus providing a model for
the study of HIV infection. This model has been used to investigate in
vivo anti-HIV antibody response by human cells from such mice. METHODS:
Hu-PBL-SCID and SCID-hu mice were injected with a variety of peptides
from gp41 and antibodies were repeatedly checked by ELISA in mouse sera.
RESULTS: Primary then secondary responses were shown to occur in SCID-hu
mice, with 225 mg/l of human IgM and 300-1860 mg/l of human IgG. The
antibody response was demonstrated to be primary in nature, particularly
since the human cells derived from naive, fetal precursor cells. When
hu-PBL-SCID mice received HIV peptides, only IgM anti-HIV antibodies
were produced (372-424 mg/l); the switch to IgG antibodies did not
occur, possibly due to the lack of human antigen-presenting cells (APC)
in these mice injected with non-adherent PBL, in contrast with the
normal development of APC from human stem cells in SCID-hu mice.
DISCUSSION AND CONCLUSION: Such humanized mice therefore lend themselves
to anti-HIV antibody production, including human monoclonal antibodies
to HIV and they possibly will also contribute to preclinical evaluation
of HIV candidate vaccines.
DE Animal *Antibody Formation Antigen-Presenting Cells/IMMUNOLOGY
Comparative Study Enzyme-Linked Immunosorbent Assay Human HIV
Antibodies/*BIOSYNTHESIS/BLOOD HIV Envelope Protein gp41/*IMMUNOLOGY
IgG/BIOSYNTHESIS IgM/BIOSYNTHESIS/BLOOD *Lymphocyte Transfusion Mice
Mice, SCID Peptide Fragments/IMMUNOLOGY MEETING ABSTRACT
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).