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1994-10-25
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Document 3195
DOCN M94A3195
TI Mycobacterium avium infection and murine AIDS.
DT 9412
AU Perronne C; Grassi F; Levacher M; Cohen Y; Maslo C; Chau F; Sinet M;
Vilde JL; Pocidalo JJ; Service des Maladies Infectieuses, Hopital
Bichat-Claude; Bernard, Paris, France.
SO Int Conf AIDS. 1994 Aug 7-12;10(1):131 (abstract no. PA0142). Unique
Identifier : AIDSLINE ICA10/94369380
AB OBJECTIVE: To study in mice the interaction between a retroviral
infection (murine AIDS) and Mycobacterium avium complex (MAC) infection.
METHODS: The murine leukemia virus LP-BM5 was inoculated to C57BL/6 mice
by i.v. injection either 8 weeks before an i.v. challenge with 10(3) or
10(6) MAC (strain MO-1) (coinfection 1), or 10 days after an i.v.
challenge with 10(3) MAC (coinfection 2). During coinfection 2, the
phenotypic alterations in blood lymphocyte subsets were monitored by
FACS-analysis using the combination of anti-CD4, CD8 and Ly5 with
anti-Ly6 monoclonal antibodies. RESULTS: During coinfection 1, LP-BM5
infection tended to decrease the mycobacterial growth, the difference
reaching statistical significance for the lower inoculum (10(3) MAC) (p
< 0.001). During coinfection 2, LP-BM5 did not modify the course of MAC
infection. Compared to uninfected mice, LP-BM5 induced a strong
activation of CD4, CD8 and B lymphocytes (Ly5+) (p < 0.001), as
evidenced by the up-regulation of Ly6 expression, while MAC did not. The
coinfection provided an immunologic pattern similar to that of LP-BM5
infection alone. DISCUSSION & CONCLUSIONS: Immune dysfunctions caused by
LP-BM5 infection did not exacerbate but rather decreased MAC infection.
Lymphocyte activation may account for this interaction. In our
experience, this model of retroviral infection of mice does not seem to
be a reliable model of immunosuppression for the study of MAC infection.
DE Animal Antibodies, Monoclonal Antigens, CD4/BLOOD Antigens, CD8/BLOOD
Antigens, Ly/BLOOD B-Lymphocyte Subsets/IMMUNOLOGY Flow Cytometry
Lymphocyte Subsets/*IMMUNOLOGY Mice Mice, Inbred C57BL Murine
Acquired Immunodeficiency Syndrome/*COMPLICATIONS/ IMMUNOLOGY
*Mycobacterium avium Tuberculosis/*COMPLICATIONS/IMMUNOLOGY MEETING
ABSTRACT
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).