Gerald I. Byrne

Secondary Outcomes of a Pilot Randomized Trial of Azithromycin Treatment for Asthma (2006)

David L. Hahn, Mary Beth Plane, Olaimatu S. Mahdi, Gerald I. Byrne

Objectives:The respiratory pathogen Chlamydia pneumoniae (C. pneumoniae) produces acute and chronic lung infections and is associated with asthma. Evidence for effectiveness of antichlamydial...

Chlamydial and Rickettsial Infections, (1998)

Byrne, Gerald I.

There is no more challenging dilemma than that presented to mammalian hosts by infection with chlamydiae and rickettsiae. These pathogens have adopted specialised mechanisms to assure satisfaction of...

Intracellular Tryptophan Pool Sizes May Account for Differences in Gamma Interferon-Mediated Inhibition and Persistence of Chlamydial Growth in Polarized and Nonpolarized Cells

Kane, Colleen D., Vena, Renee M., Ouellette, Scot P., Byrne, Gerald I.

Gamma interferon (IFN-γ) is an important factor in the modulating inhibition of intracellular chlamydial growth and persistence. In human epithelial cells and macrophages, this inhibition is the...

Prior Genital Tract Infection with a Murine or Human Biovar of Chlamydia trachomatis Protects Mice against Heterotypic Challenge Infection

Ramsey, Kyle H., Cotter, Todd W., Salyer, Rena D., Miranpuri, Gurwattan S., Yanez, Michael A., Poulsen, Christoffer E., ...

We sought to assess the degree of cross-protective immunity in a mouse model of chlamydial genital tract infection. Following resolution of genital infection with the mouse pneumonitis (MoPn) biovar...

Seroreactivity to Chlamydia trachomatis Hsp10 Correlates with Severity of Human Genital Tract Disease

LaVerda, David, Albanese, Lisa N., Ruther, Paul E., Morrison, Sandra G., Morrison, Richard P., Ault, Kevin A., ...

We have identified the chlamydial heat shock protein Hsp10 as a potential correlate to the immunopathogenic process in women with tubal factor infertility (TFI). The human serologic response to...

Chlamydia trachomatis Persistence in the Female Mouse Genital Tract: Inducible Nitric Oxide Synthase and Infection Outcome

Ramsey, Kyle H., Miranpuri, Gurwattan S., Sigar, Ira M., Ouellette, Scott, Byrne, Gerald I.

It was previously reported that female mice resolve a primary Chlamydia trachomatis urogenital infection independent of inducible nitric oxide synthase (iNOS). We now report that although...

Chlamydia pneumoniae Expresses Genes Required for DNA Replication but Not Cytokinesis during Persistent Infection of HEp-2 Cells

Byrne, Gerald I., Ouellette, Scot P., Wang, Zhao, Rao, J. P., Lu, Lin, Beatty, Wandy L., ...

Chlamydia pneumoniae causes community-acquired pneumonia and is associated with several chronic diseases, including asthma and atherosclerosis. The intracellular growth rate of C. pneumoniae slows...

Inducible Nitric Oxide Synthase Does Not Affect Resolution of Murine Chlamydial Genital Tract Infections or Eradication of Chlamydiae in Primary Murine Cell Culture

Ramsey, Kyle H., Miranpuri, Gurwattan S., Poulsen, Christoffer E., Marthakis, Nancy B., Braune, Laima M., Byrne, Gerald I.

Mice lacking inducible nitric oxide synthase (iNOS) or treated with iNOS inhibitors resolved chlamydial genital tract infections. Additionally, treatment of primary murine cell cultures with gamma...

Differential Effects of Gamma Interferon on Chlamydia trachomatis Growth in Polarized and Nonpolarized Human Epithelial Cells in Culture

Kane, Colleen D., Byrne, Gerald I.

The effects of gamma interferon (IFN-γ) on Chlamydia trachomatis growth in polarized epithelial cells were examined. The range of IFN-γ concentrations causing aberrant chlamydial growth was wider...

A Chlamydia pneumoniae Component That Induces Macrophage Foam Cell Formation Is Chlamydial Lipopolysaccharide

Kalayoglu, Murat V., Byrne, Gerald I.

Chlamydia pneumoniae infection is associated with atherosclerotic heart and vessel disease, but a causal relationship between this pathogen and the disease process has not been established. Recently,...

Cytokines Induce Indoleamine 2,3-Dioxygenase Expression in Human Atheroma-Associated Cells: Implications for Persistent Chlamydophila pneumoniae Infection

Sakash, Jessica B., Byrne, Gerald I., Lichtman, Andrew, Libby, Peter

This study shows that vascular smooth muscle cells express significantly higher levels of gamma interferon-inducible indoleamine 2,3-dioxygenase (IDO) activity than endothelium or mononuclear cells....

Isolation of Chlamydia pneumoniae Clonal Variants by a Focus-Forming Assay

Gieffers, Jens, Belland, Robert J., Whitmire, William, Ouellette, Scot, Crane, Deborah, Maass, Matthias, ...

Chlamydia pneumoniae is an obligate intracellular prokaryotic human pathogen that causes community-acquired respiratory infection and has been associated with atherosclerosis and cardiovascular...

Differential Susceptibility of Chlamydiae to Exogenous Fibroblast Interferon

Byrne, Gerald I., Rothermel, Constance D.

Mouse fibroblasts (L cells) were incubated for 5 h with 1,000 U of murine fibroblast interferon (MuIFN α+ β) per ml and then were infected with either Chlamydia trachomatis (LGV 440), C. psittaci...

The Chlamydia pneumoniae Type III Secretion-Related lcrH Gene Clusters Are Developmentally Expressed Operons†

Ouellette, Scot P., AbdelRahman, Yasser M., Belland, Robert J., Byrne, Gerald I.

Two chlamydial homologues of the Yersinia lcrH chaperone for type III secretion system structural components are present within separate gene clusters. Quantitative transcriptional analyses...

Intracellular Tryptophan Pool Sizes May Account for Differences in Gamma Interferon-Mediated Inhibition and Persistence of Chlamydial Growth in Polarized and Nonpolarized Cells

Kane, Colleen D., Vena, Renee M., Ouellette, Scot P., Byrne, Gerald I.

Gamma interferon (IFN-γ) is an important factor in the modulating inhibition of intracellular chlamydial growth and persistence. In human epithelial cells and macrophages, this inhibition is the...

Prior Genital Tract Infection with a Murine or Human Biovar of Chlamydia trachomatis Protects Mice against Heterotypic Challenge Infection

Ramsey, Kyle H., Cotter, Todd W., Salyer, Rena D., Miranpuri, Gurwattan S., Yanez, Michael A., Poulsen, Christoffer E., ...

We sought to assess the degree of cross-protective immunity in a mouse model of chlamydial genital tract infection. Following resolution of genital infection with the mouse pneumonitis (MoPn) biovar...

Seroreactivity to Chlamydia trachomatis Hsp10 Correlates with Severity of Human Genital Tract Disease

LaVerda, David, Albanese, Lisa N., Ruther, Paul E., Morrison, Sandra G., Morrison, Richard P., Ault, Kevin A., ...

We have identified the chlamydial heat shock protein Hsp10 as a potential correlate to the immunopathogenic process in women with tubal factor infertility (TFI). The human serologic response to...

Chlamydia trachomatis Persistence in the Female Mouse Genital Tract: Inducible Nitric Oxide Synthase and Infection Outcome

Ramsey, Kyle H., Miranpuri, Gurwattan S., Sigar, Ira M., Ouellette, Scott, Byrne, Gerald I.

It was previously reported that female mice resolve a primary Chlamydia trachomatis urogenital infection independent of inducible nitric oxide synthase (iNOS). We now report that although...

Chlamydia pneumoniae Expresses Genes Required for DNA Replication but Not Cytokinesis during Persistent Infection of HEp-2 Cells

Byrne, Gerald I., Ouellette, Scot P., Wang, Zhao, Rao, J. P., Lu, Lin, Beatty, Wandy L., ...

Chlamydia pneumoniae causes community-acquired pneumonia and is associated with several chronic diseases, including asthma and atherosclerosis. The intracellular growth rate of C. pneumoniae slows...

Inducible Nitric Oxide Synthase Does Not Affect Resolution of Murine Chlamydial Genital Tract Infections or Eradication of Chlamydiae in Primary Murine Cell Culture

Ramsey, Kyle H., Miranpuri, Gurwattan S., Poulsen, Christoffer E., Marthakis, Nancy B., Braune, Laima M., Byrne, Gerald I.

Mice lacking inducible nitric oxide synthase (iNOS) or treated with iNOS inhibitors resolved chlamydial genital tract infections. Additionally, treatment of primary murine cell cultures with gamma...

Differential Effects of Gamma Interferon on Chlamydia trachomatis Growth in Polarized and Nonpolarized Human Epithelial Cells in Culture

Kane, Colleen D., Byrne, Gerald I.

The effects of gamma interferon (IFN-γ) on Chlamydia trachomatis growth in polarized epithelial cells were examined. The range of IFN-γ concentrations causing aberrant chlamydial growth was wider...

A Chlamydia pneumoniae Component That Induces Macrophage Foam Cell Formation Is Chlamydial Lipopolysaccharide

Kalayoglu, Murat V., Byrne, Gerald I.

Chlamydia pneumoniae infection is associated with atherosclerotic heart and vessel disease, but a causal relationship between this pathogen and the disease process has not been established. Recently,...

Cytokines Induce Indoleamine 2,3-Dioxygenase Expression in Human Atheroma-Associated Cells: Implications for Persistent Chlamydophila pneumoniae Infection

Sakash, Jessica B., Byrne, Gerald I., Lichtman, Andrew, Libby, Peter

This study shows that vascular smooth muscle cells express significantly higher levels of gamma interferon-inducible indoleamine 2,3-dioxygenase (IDO) activity than endothelium or mononuclear cells....

Isolation of Chlamydia pneumoniae Clonal Variants by a Focus-Forming Assay

Gieffers, Jens, Belland, Robert J., Whitmire, William, Ouellette, Scot, Crane, Deborah, Maass, Matthias, ...

Chlamydia pneumoniae is an obligate intracellular prokaryotic human pathogen that causes community-acquired respiratory infection and has been associated with atherosclerosis and cardiovascular...

Differential Susceptibility of Chlamydiae to Exogenous Fibroblast Interferon

Byrne, Gerald I., Rothermel, Constance D.

Mouse fibroblasts (L cells) were incubated for 5 h with 1,000 U of murine fibroblast interferon (MuIFN α+ β) per ml and then were infected with either Chlamydia trachomatis (LGV 440), C. psittaci...

The Chlamydia pneumoniae Type III Secretion-Related lcrH Gene Clusters Are Developmentally Expressed Operons†

Ouellette, Scot P., AbdelRahman, Yasser M., Belland, Robert J., Byrne, Gerald I.

Two chlamydial homologues of the Yersinia lcrH chaperone for type III secretion system structural components are present within separate gene clusters. Quantitative transcriptional analyses...

Chlamydia pneumoniae-Induced Macrophage Foam Cell Formation Is Mediated by Toll-Like Receptor 2▿

Cao, Fei, Castrillo, Antonio, Tontonoz, Peter, Re, Fabio, Byrne, Gerald I.

Chlamydia pneumoniae induces macrophage foam cell formation, a hallmark of early atherosclerosis, in the presence of low-density lipoprotein (LDL). This study examined the role that Toll-like...