Michel D. Kazatchkine

Immunointervention for patients with HIV and tuberculosis (2009)

Vani, Janakiraman, Bansai, Kushagra, Kazatchkine, Michel D, Kaveri, Srini V, Bayry, Jagadeesh

Therapeutic options aimed at confronting the HIV pandemic face many obstacles. Current opinion on HIV-induced pathogenic immune activation and strategies aimed at eliminating HIV, including a...

DC-SIGN and alpha 2,6-sialylated IgG Fc interaction is dispensable for the anti-inflammatory activity of IVIg on human dendritic cells (2009)

Bayry, Jagadeesh, Bansal, Kushagra, Kazatchkine, Michel D, Kaveri, Srini V

Intravenous immunoglobulin (IVIg) is widely used to treat autoimmune diseases. Several mutually nonexclusive mechanisms are proposed to explain the beneficial effects of IVIg in patients (1, 2)....

Induction of maturation and activation of human dendritic cells: A mechanism underlying the beneficial effect of Viscum albumas complimentary therapy in cancer (2008)

Elluru, Sri, Van Huyen, Jean-Paul, Delignat, Sandrine, Kazatchkine, Michel D, Friboulet, Alain, Kaveri, Srini V, ...

Abstract Background Viscum album (VA) preparations have been used as a complimentary therapy in cancer. In addition to their cytotoxic properties, they have also been shown to have immunostimulatory...

Catalytic IgG from Patients with Hemophilia A Inactivate Therapeutic Factor VIII (2006)

Lacroix-Desmazes, Sebastien, Bharath, Wootla, Dasgupta, Suryasarathi, Sandrine, Delignat, Bayry, Jagadeesh, Reinbolt, Joseph, ...

Factor VIII (FVIII) inhibitors are anti-FVIII IgG that arise in up to 50% of the patients with hemophilia A, upon therapeutic administration of exogenous FVIII. Factor VIII inhibitors neutralize the...

Catalytic IgG from Patients with Hemophilia A Inactivate Therapeutic Factor VII (2006)

Lacroix-Desmazes, Sebastien, Wootla, Bharath, Dasgupta, Suryasarathi, Delignat, Sandrine, Bayry, Jagadeesh, Reinbolt, Joseph, ...

Factor VIII (FVIII) inhibitors are anti-FVIII IgG that arise in up to 50% of the patients with hemophilia A, upon therapeutic administration of exogenous FVIII. Factor VIII inhibitors neutralize the...

Physiopathology of catalytic antibodies:the case for factor VIII-hydrolyzing immunoglobulin G (2006)

Bharath, Wootla, Dasgupta, Suryasarathi, Mallet, Vincent, Kazatchkine, Michel D, Nagaraja, Valakunja, Friboulet, Alain, ...

Antibodies that are able to catalyze the antigen for which they are specific are produced spontaneously by the immune system. Catalytic immunoglobulins (Igs) both of the IgM and IgG isotypes have...

Natural human polyreactive IgM induce apoptosis of lymphoid cell lines and human peripheral blood mononuclear cells (2004)

Varambally, Sooryanarayana, Bar-Dayan, Yaron, Bayry, Jagadeesh, Lacroix-Desmazes, Sébastien, Horn, Michael, Sorel, Marc, ...

Natural polyreactive IgM autoantibodies, encoded by unmutated germline Ig V genes, represent a major fraction of the normal circulating IgM repertoire. We have previously shown that therapeutic...

The prevalence of proteolytic antibodies against factor VIII in hemophilia A (2002)

Bayry, Jagadeesh, Misra, Namita, Horn, Michael P, Villard, Sylvie, Pashov, Anastas, ...

BACKGROUND: Factor VIII inhibitors are IgG alloantibodies that arise during replacement therapy in 25 to 50 percent of patients with severe hemophilia A. The hydrolysis of factor VIII by anti--factor...

The prevalence of proteolytic antibodies against factor VIII in hemophilia A (2002)

Bayry, Jagadeesh, Misra, Namita, Horn, Michael P, Villard, Sylvie, Pashov, Anastas, ...

BACKGROUND: Factor VIII inhibitors are IgG alloantibodies that arise during replacement therapy in 25 to 50 percent of patients with severe hemophilia A. The hydrolysis of factor VIII by anti--factor...

Expression of CD21 is developmentally regulated during thymic maturation of human T lymphocytes (1999)

Fischer, Elizabeth M., Mouhoub, Amal, Maillet, Françoise, Frémeaux-Bacchi, Véronique, Krief, Corinne, Gould, Hannah, ...

CD21, the C3d/CD23/Epstein–Barr virus (EBV), receptor is expressed at low density on cells of the T lineage. Immature thymocytes express CD21 with high density. In the present study, we have...

Analysis of natural and disease-associated autoantibody repertoires: anti-endothelial cell IgG autoantibody activity in the serum of healthy individuals and patients with systemic lupus erythematosus (1994)

Ronda, Nicoletta, Haury, Mattias, Nobrega, Alberto, Kaveri, Srinivas V., Coutinho, Antonio, Kazatchkine, Michel D.

The present study demonstrates that natural IgG with anti-endothelial cell activity is present in the serum of healthy individuals and in pooled normal human Ig. By using a novel method that allows...

Human immunoglobulin preparations for intravenous use prevent experimental autoimmune uveoretinitis (1993)

Saoudi, Abdelhadi, Hurez, Vincent, De Kozak, Yvonne, Kuhn, Joelle, Kaveri, Srinivas V., Kazatchkine, Michel D., ...

We have evaluated the effect of human Igs for intravenous use (IVIg) on the onset and development of experimental autoimmune uveoretinitis (EAU), a T cell-dependent autoimmune disease induced in rats...

Detection of Y Chromosome DNA as Evidence of Semen in Cervicovaginal Secretions of Sexually Active Women

Chomont, Nicolas, Grésenguet, Gérard, Lévy, Michel, Hocini, Hakim, Becquart, Pierre, Matta, Mathieu, ...

The detection of traces of semen in cervicovaginal secretions (CVS) from sexually active women practicing unprotected sex is a prerequisite for the accurate study of cervicovaginal immunity. Two...

Genetically Related Human Immunodeficiency Virus Type 1 in Three Adults of a Family with No Identified Risk Factor for Intrafamilial Transmission

Bélec, Laurent, Mohamed, Ali Si, Müller-Trutwin, Michaela C., Gilquin, Jacques, Gutmann, Laurent, Safar, Michel, ...

A small number of cases of human immunodeficiency virus (HIV) infection have been reported in individuals with no identified risk factors for transmission. We report on the seroconversion of the...

Active and Selective Transcytosis of Cell-Free Human Immunodeficiency Virus through a Tight Polarized Monolayer of Human Endometrial Cells

Hocini, Hakim, Becquart, Pierre, Bouhlal, Hicham, Chomont, Nicolas, Ancuta, Petronela, Kazatchkine, Michel D., ...

We report that both primary and laboratory-adapted infectious human immunodeficiency virus type 1 (HIV-1) isolates in a cell-free form are capable of transcytosis through a tight and polarized...

Binding of LFA-1 (CD11a) to Intercellular Adhesion Molecule 3 (ICAM-3; CD50) and ICAM-2 (CD102) Triggers Transmigration of Human Immunodeficiency Virus Type 1-Infected Monocytes through Mucosal Epithelial Cells

Carreno, Marie-Paule, Chomont, Nicolas, Kazatchkine, Michel D., Irinopoulou, Theano, Krief, Corrine, Mohamed, Ali-Si, ...

Transmigration of human immunodeficiency virus (HIV)-infected mononuclear cells through the genital mucosa is one of the possible mechanisms of sexual transmission of HIV. Here, we investigated the...

Structural Determinants of the Capacity of Heparin to Inhibit the Formation of the Human Amplification C3 Convertase

Kazatchkine, Michel D., Fearon, Douglas T., Metcalfe, Dean D., Rosenberg, Robert D., Austen, K. Frank

The ability of heparin glycosaminoglycan to prevent formation of the properdin-stabilized amplification C3 convertase is independent of antithrombin binding activity and requires substitution of the...

Natural antibodies sustain differentiation and maturation of human dendritic cells

Bayry, Jagadeesh, Lacroix-Desmazes, Sébastien, Donkova-Petrini, Vladimira, Carbonneil, Cédric, Misra, Namita, Lepelletier, Yves, ...

The differentiation and maturation of dendritic cells (DCs) is governed by various signals in the microenvironment. Monocytes and DCs circulate in peripheral blood, which contains high levels of...

High levels of catalytic antibodies correlate with favorable outcome in sepsis

Lacroix-Desmazes, Sébastien, Bayry, Jagadeesh, Kaveri, Srini V., Hayon-Sonsino, David, Thorenoor, Nithyananda, Charpentier, Julien, ...

Sepsis is the leading cause of death in intensive care units and results from a deleterious systemic host response to infection. Although initially perceived as potentially deleterious, catalytic...

Detection of Y Chromosome DNA as Evidence of Semen in Cervicovaginal Secretions of Sexually Active Women

Chomont, Nicolas, Grésenguet, Gérard, Lévy, Michel, Hocini, Hakim, Becquart, Pierre, Matta, Mathieu, ...

The detection of traces of semen in cervicovaginal secretions (CVS) from sexually active women practicing unprotected sex is a prerequisite for the accurate study of cervicovaginal immunity. Two...

Genetically Related Human Immunodeficiency Virus Type 1 in Three Adults of a Family with No Identified Risk Factor for Intrafamilial Transmission

Bélec, Laurent, Mohamed, Ali Si, Müller-Trutwin, Michaela C., Gilquin, Jacques, Gutmann, Laurent, Safar, Michel, ...

A small number of cases of human immunodeficiency virus (HIV) infection have been reported in individuals with no identified risk factors for transmission. We report on the seroconversion of the...

Active and Selective Transcytosis of Cell-Free Human Immunodeficiency Virus through a Tight Polarized Monolayer of Human Endometrial Cells

Hocini, Hakim, Becquart, Pierre, Bouhlal, Hicham, Chomont, Nicolas, Ancuta, Petronela, Kazatchkine, Michel D., ...

We report that both primary and laboratory-adapted infectious human immunodeficiency virus type 1 (HIV-1) isolates in a cell-free form are capable of transcytosis through a tight and polarized...

Binding of LFA-1 (CD11a) to Intercellular Adhesion Molecule 3 (ICAM-3; CD50) and ICAM-2 (CD102) Triggers Transmigration of Human Immunodeficiency Virus Type 1-Infected Monocytes through Mucosal Epithelial Cells

Carreno, Marie-Paule, Chomont, Nicolas, Kazatchkine, Michel D., Irinopoulou, Theano, Krief, Corrine, Mohamed, Ali-Si, ...

Transmigration of human immunodeficiency virus (HIV)-infected mononuclear cells through the genital mucosa is one of the possible mechanisms of sexual transmission of HIV. Here, we investigated the...

Structural Determinants of the Capacity of Heparin to Inhibit the Formation of the Human Amplification C3 Convertase

Kazatchkine, Michel D., Fearon, Douglas T., Metcalfe, Dean D., Rosenberg, Robert D., Austen, K. Frank

The ability of heparin glycosaminoglycan to prevent formation of the properdin-stabilized amplification C3 convertase is independent of antithrombin binding activity and requires substitution of the...

Natural antibodies sustain differentiation and maturation of human dendritic cells

Bayry, Jagadeesh, Lacroix-Desmazes, Sébastien, Donkova-Petrini, Vladimira, Carbonneil, Cédric, Misra, Namita, Lepelletier, Yves, ...

The differentiation and maturation of dendritic cells (DCs) is governed by various signals in the microenvironment. Monocytes and DCs circulate in peripheral blood, which contains high levels of...

High levels of catalytic antibodies correlate with favorable outcome in sepsis

Lacroix-Desmazes, Sébastien, Bayry, Jagadeesh, Kaveri, Srini V., Hayon-Sonsino, David, Thorenoor, Nithyananda, Charpentier, Julien, ...

Sepsis is the leading cause of death in intensive care units and results from a deleterious systemic host response to infection. Although initially perceived as potentially deleterious, catalytic...

Induction of apoptosis of endothelial cells by Viscum album: a role for anti-tumoral properties of mistletoe lectins.

Bayry, Jagadeesh, Delignat, Sandrine, Gaston, Anh Thu, Michel, Odile, Bruneval, Patrick, ...

BACKGROUND: Viscum album (VA) preparations consist of aqueous extracts of different types of lectins of VA. Mistletoe lectins have both cytotoxic and immunomodulatory properties that support their...

A role for exposed mannosylations in presentation of human therapeutic self-proteins to CD4+ T lymphocytes

Dasgupta, Suryasarathi, Navarrete, Ana-Maria, Bayry, Jagadeesh, Delignat, Sandrine, Wootla, Bharath, André, Sébastien, ...

Several therapeutic self-proteins elicit immune responses when administered to patients. Such adverse immune responses reduce drug efficacy. To induce an immune response, a protein must interact with...

In silico identified CCR4 antagonists target regulatory T cells and exert adjuvant activity in vaccination

Bayry, Jagadeesh, Tchilian, Elma Z., Davies, Matthew N., Forbes, Emily K., Draper, Simon J., Kaveri, Srini V., ...

Adjuvants are substances that enhance immune responses and thus improve the efficacy of vaccination. Few adjuvants are available for use in humans, and the one that is most commonly used (alum) often...

Inhibition of HIV-1 transmission in trans from dendritic cells to CD4+ T lymphocytes by natural antibodies to the CRD domain of DC-SIGN purified from breast milk and intravenous immunoglobulins

Requena, Mary, Bouhlal, Hicham, Nasreddine, Nadine, Saidi, Hela, Gody, Jean-Chrysostome, Aubry, Sylvie, ...

The present study demonstrates that human breast milk and normal human polyclonal immunoglobulins purified from plasma [intravenous immunoglobulins (IVIg)] contain functional natural immunoglobulin A...