Anne Couëdel-Courteille

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Human immunodeficiency virus (HIV) induces a profound disorganization of the lymphoid tissues with marked abnormalities of the immune system at the terminal stage of infection. Since the digestive mucosal immune system is by far the largest lymphoid organ of the body, we attempted to evaluate its functional activity in advanced stages of simian(More)
The two isoforms of the Rab6 GTPase, Rab6A and Rab6A', regulate a retrograde transport route connecting early endosomes and the endoplasmic reticulum via the Golgi complex in interphasic cells. Here we report that when Rab6A' function is altered cells are unable to progress normally through mitosis. Such cells are blocked in metaphase, despite displaying a(More)
Receptive ano-rectal intercourse is a major cause of HIV infection in men having sex with men and in heterosexuals. Current knowledge of the mechanisms of entry and dissemination during HIV rectal transmission is scarce and does not allow the development of preventive strategies. We investigated the early steps of rectal infection in rhesus macaques(More)
In mice, CD8α(+) myeloid dendritic cells (mDC) optimally cross-present Ags to CD8(+) T cells and respond strongly to TLR3 ligands. Although equivalent DC have been identified by comparative genomic analysis and functional studies in humans as XCR1(+)CD141 (BDCA-3)(+)Clec9A(+)cell adhesion molecule 1(+) mDC, and in sheep as CD26(+) mDC, these cells remained(More)
Antiretroviral therapy (ART) has led to dramatic improvements in the lives of HIV-infected persons. However, residual immune activation, which persists despite ART, is associated with increased risk of non-AIDS morbidities. Accumulating evidence shows that disruption of the gut mucosal epithelium during SIV/HIV infections allows translocation of microbial(More)
Homosexual transmission remains a major mode of contamination in developed countries. Early virological and immunological events in lymphoid tissues are known to be important for the outcome of HIV infections. Little data are available, however, on viral dissemination during primary rectal infection. We therefore studied this aspect of rectal infection in(More)
Rectal infection of macaques by SIV is a model for rectal HIV transmission. We focus here on the digestive tract during days 7-14 of primary rectal infection by SIV in 15 rhesus macaques. Surprisingly, we did not detect productively infected cells in the rectosigmoid colon at early stages of viral dissemination. This strongly suggests that there is no(More)
OBJECTIVES Thymus dysfunction characterizes human/simian immunodeficiency virus (SIV) infections and contributes to physiopathology. However, both the mechanisms involved in thymic dysfunction and its precise timing remain unknown. We here analyzed thymic function during acute SIV infection in rhesus macaques. DESIGN AND METHODS Rhesus macaques were(More)
Aside from representing a physical barrier and providing an unfavorable chemical milieu to viral and bacterial infections, mucosae of gut and female genital tract also contain organized lymphoid structures that support the initiation of anti-microbial immune responses, and more diffuse lymphoid tissues that represent immune effector mucosal sites. Local(More)
The most common route of transmission of HIV is via the mucosa. We compared human and macaque intestinal epithelia to determine whether the SIV macaque system can be used as a model to study HIV transmission by the rectal route. The overall morphology of the macaque gut mucosa is very similar to that of humans. Differentiation markers follow the same(More)