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Biomedical subjects

C Rouzioux

Publications and source records attributed to C Rouzioux.

At least 145 records · Page 8Linked to original sources
PubMed1986

Transmission of lymphadenopathy-associated virus/human T lymphotropic virus type III in sexual partners. Seropositivity does not predict infectivity in all cases.

To investigate transmission of lymphadenopathy-associated virus (LAV)/human T lymphotropic virus type III (HTLV-III) in long-term sexual partners, and the relationship between lymphadenopathy-associated virus seropositivity and transmission, nine couples (five heterosexual and four homosexual) at increased risk for acquired immune deficiency syndrome (AIDS) were studied. In two heterosexual couples, transmission of lymphadenopathy-associated virus from a seropositive man at increased risk to his monogamous wife occurred. In one couple, the wife of a man with hemophilia had lymphadenopathy-associated virus antibody and decreased T helper cells; in the other couple, the wife of a bisexual intravenous drug-user had AIDS. Neither woman had a recognized AIDS risk except marriage to a seropositive man at increased risk. However, study of the other couples revealed that regular sexual contact with seropositive persons over long periods did not always lead to evidence of lymphadenopathy-associated virus infection. This study suggests that presence of lymphadenopathy-associated virus antibody does not always indicate a high degree of infectivity.

Acquired Immunodeficiency Syndrome↗
PubMed1986

[LAV type II: a second retrovirus associated with AIDS in West Africa].

A second retrovirus, named LAV-II, has been isolated from two West-African patients with AIDS. By its genomic sequences and its proteins, this virus is different from the LAV-I/HTLV-III, isolated from U.S.A., Europe and Central Africa. It differs also from STLV-III, isolated from Rhesus Macaques with AIDS, but displays an antigenic relationship with the latter virus, at the level of its external envelope protein. The tropism of LAV-II for T4 lymphocytes and the induction of cytopathic effect in infected cells are similar to those of LAV-I.

Acquired Immunodeficiency Syndrome↗
PubMed1985

Immunoglobulin G antibodies to lymphadenopathy-associated virus in differently treated French and Belgian hemophiliacs.

Immunoglobulin G antibodies to lymphadenopathy-associated virus have been detected in two groups of French hemophiliacs and in one group of Belgian hemophiliacs, whose mode of treatment differed. Seropositivity was more frequent (58.9%) in patients heavily transfused with blood products of French and foreign origin than in less frequently transfused persons (10.3%). The Belgian group, treated only with local products, showed the lowest frequency of seropositivity (3.4%). In healthy French controls, 1 of 330 had antibody to the virus. The results indicate transmission of lymphadenopathy-associated virus via blood-derived products.

Antibodies, Viral↗
PubMed1985

Transient antibody to lymphadenopathy-associated virus/human T-lymphotropic virus type III and T-lymphocyte abnormalities in the wife of a man who developed the acquired immunodeficiency syndrome.

We present evidence of transmission of lymphadenopathy-associated virus (LAV)/human T-lymphotropic virus type III (HTLV-III) from a man to his wife, and a return to a normal number of T-helper lymphocytes and loss of antibody after discontinuing sexual exposure to LAV/HTLV-III. The man had hemophilia A, and developed the lymphadenopathy syndrome, antibody to LAV, and a low number of T-helper lymphocytes. His wife, who had no risks for the acquired immunodeficiency syndrome other than sexual contact with him, developed LAV antibody (titer, 1:160) and a mildly decreased number of T-helper cells. The husband subsequently developed the syndrome and lost the LAV antibody. During 10 months of follow-up his wife remained clinically well, discontinued exposure to semen, and then lost the LAV antibody, and regained a normal number of T-helper cells.

Acquired Immunodeficiency Syndrome↗
PubMed1984

Lymphadenopathy-associated viral antibody in AIDS. Immune correlations and definition of a carrier state.

We investigated whether serologic evidence of lymphadenopathy-associated virus (LAV), an exogenous human T-cell lymphotropic and cytopathic retrovirus, correlated with the acquisition and transmission of the acquired immunodeficiency syndrome (AIDS). Serum from 17 of 25 patients with AIDS contained circulating IgG anti-LAV antibody (all of 5 adults with cancer and 6 of 12 adults and 6 of 8 children with opportunistic infections, with or without Kaposi's sarcoma). All of eight homosexual men with generalized lymphadenopathy or the AIDS-related complex and five homosexual men with AIDS prodromes who subsequently had AIDS were also seropositive. The anti-LAV antibody was not found in 99 of 100 healthy blood donors or in 23 patients with genetic immunodeficiencies, supporting the contention that LAV is unlikely to represent simply another opportunistic microorganism. An AIDS carrier state was indicated by the probable transfer of LAV from asymptomatic, immunologically competent mothers to their offspring. These data offer a basis for the hypotheses that LAV is a marker for AIDS, may be carried and transmitted in the absence of clinical findings or in vitro T-cell abnormalities, and is probably an etiologically important agent in AIDS and its prodromes.

Acquired Immunodeficiency Syndrome↗
PubMed1984

Prevalence of antibodies to lymphadenopathy-associated retrovirus in African patients with AIDS.

The presence of antibodies to lymphadenopathy-associated retrovirus (LAV) was determined by a radioimmunoprecipitation assay and by an enzyme-linked immunosorbent solid assay of sera from Zairian patients with the acquired immune deficiency syndrome (AIDS) in 1983. Thirty-five of 37 patients (94 percent) and 32 of 36 patients (88 percent), respectively, were seropositive by the two tests. In a control group of 26 patients, six (23 percent) showed positive results in these tests. Of these six control patients, five had clinically demonstrable infectious diseases and a low ratio of T4 to T8 lymphocytes. In addition, sera collected from a control group of Zairian mothers in 1980 were positive for LAV in 5 of 100 cases. Other serologic data suggest that LAV was present as early as 1977 in Zaire.

Acquired Immunodeficiency Syndrome↗
PubMed1984

Selective tropism of lymphadenopathy associated virus (LAV) for helper-inducer T lymphocytes.

Lymphadenopathy associated virus ( LAV ) has been isolated from patients with the acquired immunodeficiency syndrome (AIDS) or lymphadenopathy syndrome. Since the immune deficiency in AIDS seems to be primarily related to the defect of the helper-inducer T lymphocyte subset, the possibility that LAV is selectively tropic for this subset was investigated. Fractionation of T lymphocytes was achieved by cellular affinity chromatography with monoclonal antibodies. In a hemophilic patient who was a healthy carrier of LAV , reverse transcriptase activity and virus particles detected by electron microscopy were found only in cultures of helper-inducer lymphocytes. When infected with LAV in vitro, lymphocyte subsets from normal individuals yielded similar results. Virus production was associated with impaired proliferation, modulation of T3-T4 cell markers, and the appearance of cytopathic effects. The results provide evidence for the involvement of LAV in AIDS.

Acquired Immunodeficiency Syndrome↗
PubMed1984

Isolation of human T-lymphotropic retrovirus (LAV) from Zairian married couple, one with AIDS, one with prodromes.

A Zairian married couple had been living in France since 1981. The man had acquired immunodeficiency syndrome (AIDS) and his wife had prodromes of the disorder. Infection with a human T-lymphotropic retrovirus (lymphadenopathy-associated virus) was demonstrated in both by isolation of the virus from their cultured lymphocytes and the detection of specific antibodies in serum samples. Since this virus has been isolated from patients in other AIDS risk categories, the finding of the virus in AIDS patients from the African group adds further support to the hypothesis that this human retrovirus is the AIDS aetiological agent.

Acquired Immunodeficiency Syndrome↗