Bruce A. Vallance

Salmonella Pathogenicity Island 2 Is Expressed Prior to Penetrating the Intestine (2005)

Nat F. Brown, Bruce A. Vallance, Brian K. Coombes, Yanet Valdez, Bryan A. Coburn, B. Brett Finlay

Salmonella enterica serovar Typhimurium is a facultative intracellular pathogen that causes disease in mice that resembles human typhoid. Typhoid pathogenesis consists of distinct phases in the...

Salmonella pathogenicity island 2 is expressed prior to penetrating the intestine (2005)

Brown, Nathaniel Francis, Vallance, Bruce A., Coombes, Brian K., Vandez, Yanet, Coburn, Bryan A., Finlay, B. Brett

Salmonella enterica serovar Typhimurium is a facultative intracellular pathogen that causes disease in mice that resembles human typhoid. Typhoid pathogenesis consists of distinct phases in the...

Salmonella pathogenicity island 2 is expressed prior to penetrating the intestine (2005)

Brown, Nathaniel Francis, Vallance, Bruce A., Coombes, Brian K., Vandez, Yanet, Coburn, Bryan A., Finlay, B. Brett

Salmonella enterica serovar Typhimurium is a facultative intracellular pathogen that causes disease in mice that resembles human typhoid. Typhoid pathogenesis consists of distinct phases in the...

Salmonella pathogenicity island 2 is expressed prior to penetrating the intestine (2005)

Brown, Nathaniel Francis, Vallance, Bruce A., Coombes, Brian K., Vandez, Yanet, Coburn, Bryan A., Finlay, B. Brett

Salmonella enterica serovar Typhimurium is a facultative intracellular pathogen that causes disease in mice that resembles human typhoid. Typhoid pathogenesis consists of distinct phases in the...

Clearance of Citrobacter rodentium requires B cells but not secretory immunoglobulin A (IgA) or IgM antibodies. (2004)

Maaser, Christian, Housley, Michael P., Iimura, Mitsutoshi, Smith, Jennifer R., Vallance, Bruce A., Finlay, B. Brett, ...

Citrobacter rodentium, a murine model pathogen for human enteropathogenic Escherichia coli, predominantly colonizes the lumen and mucosal surface of the colon and cecum and causes crypt hyperplasia...

SseA is required for translocation of Salmonella pathogenicity island-2 effectors into host cells (2003)

Coombes, Brian K., Brown, Nathaniel Francis, Kujat-Choy, Sonya, Vallance, Bruce A., Finlay, B. Brett

The Salmonella pathogenicity island-2 (SPI2) is a virulence locus on the bacterial chromosome required for intracellular proliferation and systemic infection in mice. Cell culture models and a murine...

SopD2 is a novel type III secreted effector of Salmonella typhimurium that targets late endocytic compartments upon delivery into host cells (2003)

Brumell, John H., Kujat-Choy, Sonya, Brown, Nathaniel Francis, Vallance, Bruce A., Knodler, Leigh A., Finlay, B. Brett

Salmonella typhimurium is a facultative intracellular pathogen that utilizes two type III secretion systems to deliver virulence proteins into host cells. These proteins, termed effectors, alter host...

SseA is required for translocation of Salmonella pathogenicity island-2 effectors into host cells (2003)

Coombes, Brian K., Brown, Nathaniel Francis, Kujat-Choy, Sonya, Vallance, Bruce A., Finlay, B. Brett

The Salmonella pathogenicity island-2 (SPI2) is a virulence locus on the bacterial chromosome required for intracellular proliferation and systemic infection in mice. Cell culture models and a murine...

SopD2 is a novel type III secreted effector of Salmonella typhimurium that targets late endocytic compartments upon delivery into host cells (2003)

Brumell, John H., Kujat-Choy, Sonya, Brown, Nathaniel Francis, Vallance, Bruce A., Knodler, Leigh A., Finlay, B. Brett

Salmonella typhimurium is a facultative intracellular pathogen that utilizes two type III secretion systems to deliver virulence proteins into host cells. These proteins, termed effectors, alter host...

SseA is required for translocation of Salmonella pathogenicity island-2 effectors into host cells (2003)

Coombes, Brian K., Brown, Nathaniel Francis, Kujat-Choy, Sonya, Vallance, Bruce A., Finlay, B. Brett

The Salmonella pathogenicity island-2 (SPI2) is a virulence locus on the bacterial chromosome required for intracellular proliferation and systemic infection in mice. Cell culture models and a murine...

SopD2 is a novel type III secreted effector of Salmonella typhimurium that targets late endocytic compartments upon delivery into host cells (2003)

Brumell, John H., Kujat-Choy, Sonya, Brown, Nathaniel Francis, Vallance, Bruce A., Knodler, Leigh A., Finlay, B. Brett

Salmonella typhimurium is a facultative intracellular pathogen that utilizes two type III secretion systems to deliver virulence proteins into host cells. These proteins, termed effectors, alter host...

SseA is required for translocation of Salmonella pathogenicity island-2 effectors into host cells (2003)

Coombes, Brian K., Brown, Nathaniel Francis, Kujat-Choy, Sonya, Vallance, Bruce A., Finlay, B. Brett

The Salmonella pathogenicity island-2 (SPI2) is a virulence locus on the bacterial chromosome required for intracellular proliferation and systemic infection in mice. Cell culture models and a murine...

SopD2 is a novel type III secreted effector of Salmonella typhimurium that targets late endocytic compartments upon delivery into host cells (2003)

Brumell, John H., Kujat-Choy, Sonya, Brown, Nathaniel Francis, Vallance, Bruce A., Knodler, Leigh A., Finlay, B. Brett

Salmonella typhimurium is a facultative intracellular pathogen that utilizes two type III secretion systems to deliver virulence proteins into host cells. These proteins, termed effectors, alter host...

The immunomodulation of intestinal smooth muscle function (1999)

Vallance, Bruce A

In response to an enteric infection, the host mobilizes inflammatory and immune cells to combat the invading pathogen. Studies suggest that physiologic tissues such as smooth muscle are also...

CD4 T Cells and Major Histocompatibility Complex Class II Expression Influence Worm Expulsion and Increased Intestinal Muscle Contraction during Trichinella spiralis Infection

Vallance, Bruce A., Galeazzi, Francesca, Collins, Stephen M., Snider, Denis P.

Expulsion of intestinal nematode parasites and the associated increased contraction by intestinal muscle are T cell dependent, since both are attenuated in athymic rodents. The CD4 T-cell subset has...

Enteropathogenic Escherichia coli Infection Induces Expression of the Early Growth Response Factor by Activating Mitogen-Activated Protein Kinase Cascades in Epithelial Cells

De Grado, Myriam, Rosenberger, Carrie M., Gauthier, Annick, Vallance, Bruce A., Finlay, B. Brett

Enteropathogenic Escherichia coli (EPEC) is an extracellular bacterial pathogen that infects the human intestinal epithelium and is a major cause of infantile diarrhea in developing countries. EPEC...

Locus of Enterocyte Effacement from Citrobacter rodentium: Sequence Analysis and Evidence for Horizontal Transfer among Attaching and Effacing Pathogens

Deng, Wanyin, Li, Yuling, Vallance, Bruce A., Finlay, B. Brett

The family of attaching and effacing (A/E) bacterial pathogens, which includes diarrheagenic enteropathogenic Escherichia coli (EPEC) and enterohemorrhagic E. coli (EHEC), remains a significant...

Mice Lacking T and B Lymphocytes Develop Transient Colitis and Crypt Hyperplasia yet Suffer Impaired Bacterial Clearance during Citrobacter rodentium Infection

Vallance, Bruce A., Deng, Wanyin, Knodler, Leigh A., Finlay, B. Brett

The bacterial pathogen Citrobacter rodentium belongs to a family of gastrointestinal pathogens that includes enteropathogenic and enterohemorrhagic Escherichia coli and is the causative agent of...

Modulation of Inducible Nitric Oxide Synthase Expression by the Attaching and Effacing Bacterial Pathogen Citrobacter rodentium in Infected Mice

Vallance, Bruce A., Deng, Wanyin, De Grado, Myriam, Chan, Crystal, Jacobson, Kevan, Finlay, B. Brett

Citrobacter rodentium belongs to the attaching and effacing family of enteric bacterial pathogens that includes both enteropathogenic and enterohemorrhagic Escherichia coli. These bacteria infect...

Host–pathogen interactions: Host resistance factor Nramp1 up-regulates the expression of Salmonella pathogenicity island-2 virulence genes

Zaharik, Michelle L., Vallance, Bruce A., Puente, José L., Gros, Philippe, Finlay, B. Brett

Nramp1 (Natural resistance-associated macrophage protein-1; also known as Slc11a1) is a host resistance gene that provides protection against several intracellular pathogens, including Salmonella...

Host Susceptibility to the Attaching and Effacing Bacterial Pathogen Citrobacter rodentium

Vallance, Bruce A., Deng, Wanyin, Jacobson, Kevan, Finlay, B. Brett

Many studies have shown that genetic susceptibility plays a key role in determining whether bacterial pathogens successfully infect and cause disease in potential hosts. Surprisingly, whether host...

Dissecting virulence: Systematic and functional analyses of a pathogenicity island

Deng, Wanyin, Puente, José L., Gruenheid, Samantha, Li, Yuling, Vallance, Bruce A., Vázquez, Alejandra, ...

Bacterial pathogenicity islands (PAI) often encode both effector molecules responsible for disease and secretion systems that deliver these effectors to host cells. Human enterohemorrhagic...

Clearance of Citrobacter rodentium Requires B Cells but Not Secretory Immunoglobulin A (IgA) or IgM Antibodies

Maaser, Christian, Housley, Michael P., Iimura, Mitsutoshi, Smith, Jennifer R., Vallance, Bruce A., Finlay, B. Brett, ...

Citrobacter rodentium, a murine model pathogen for human enteropathogenic Escherichia coli, predominantly colonizes the lumen and mucosal surface of the colon and cecum and causes crypt hyperplasia...

SseK1 and SseK2 Are Novel Translocated Proteins of Salmonella enterica Serovar Typhimurium

Kujat Choy, Sonya L., Boyle, Erin C., Gal-Mor, Ohad, Goode, David L., Valdez, Yanet, Vallance, Bruce A., ...

Salmonella enterica is a gram-negative, facultative intracellular pathogen that causes disease symptoms ranging from gastroenteritis to typhoid fever. A key virulence strategy is the translocation of...

Modulation of Host Cytoskeleton Function by the Enteropathogenic Escherichia coli and Citrobacter rodentium Effector Protein EspG

Hardwidge, Philip R., Deng, Wanyin, Vallance, Bruce A., Rodriguez-Escudero, Isabel, Cid, Victor J., Molina, Maria, ...

EspG is a conserved protein encoded by the locus of enterocyte effacement (LEE) of attaching and effacing (A/E) pathogens, including enteropathogenic and enterohemorrhagic Escherichia coli and...

Salmonella enterica Serovar Typhimurium Pathogenicity Island 2 Is Necessary for Complete Virulence in a Mouse Model of Infectious Enterocolitis

Coburn, Bryan, Li, Yuling, Owen, David, Vallance, Bruce A., Finlay, B. Brett

Salmonella species cause a wide range of disease in multiple hosts. Salmonella enterica serovar Typhimurium causes self-limited intestinal disease in humans and systemic typhoid-like illness in...

Cloning Vectors and Fluorescent Proteins Can Significantly Inhibit Salmonella enterica Virulence in Both Epithelial Cells and Macrophages: Implications for Bacterial Pathogenesis Studies

Knodler, Leigh A., Bestor, Aaron, Ma, Caixia, Hansen-Wester, Imke, Hensel, Michael, Vallance, Bruce A., ...

Plasmid vectors and fluorescent protein reporter systems are commonly used in the study of bacterial pathogenesis. Here we show that they can impair the ability of Salmonella enterica serovar...

Salmonella Pathogenicity Island 2 Is Expressed Prior to Penetrating the Intestine

Brown, Nat F, Vallance, Bruce A, Coombes, Brian K, Valdez, Yanet, Coburn, Bryan A, Finlay, B. Brett

Salmonella enterica serovar Typhimurium is a facultative intracellular pathogen that causes disease in mice that resembles human typhoid. Typhoid pathogenesis consists of distinct phases in the...

Toll-Like Receptor 4 Contributes to Colitis Development but Not to Host Defense during Citrobacter rodentium Infection in Mice

Khan, Mohammed A., Ma, Caixia, Knodler, Leigh A., Valdez, Yanet, Rosenberger, Carrie M., Deng, Wanyin, ...

Enteropathogenic Escherichia coli (EPEC) and enterohemorrhagic E. coli (EHEC) are noninvasive bacterial pathogens that infect their hosts' intestinal epithelium, causing severe diarrheal disease....

CD4 T Cells and Major Histocompatibility Complex Class II Expression Influence Worm Expulsion and Increased Intestinal Muscle Contraction during Trichinella spiralis Infection

Vallance, Bruce A., Galeazzi, Francesca, Collins, Stephen M., Snider, Denis P.

Expulsion of intestinal nematode parasites and the associated increased contraction by intestinal muscle are T cell dependent, since both are attenuated in athymic rodents. The CD4 T-cell subset has...

Enteropathogenic Escherichia coli Infection Induces Expression of the Early Growth Response Factor by Activating Mitogen-Activated Protein Kinase Cascades in Epithelial Cells

De Grado, Myriam, Rosenberger, Carrie M., Gauthier, Annick, Vallance, Bruce A., Finlay, B. Brett

Enteropathogenic Escherichia coli (EPEC) is an extracellular bacterial pathogen that infects the human intestinal epithelium and is a major cause of infantile diarrhea in developing countries. EPEC...

Locus of Enterocyte Effacement from Citrobacter rodentium: Sequence Analysis and Evidence for Horizontal Transfer among Attaching and Effacing Pathogens

Deng, Wanyin, Li, Yuling, Vallance, Bruce A., Finlay, B. Brett

The family of attaching and effacing (A/E) bacterial pathogens, which includes diarrheagenic enteropathogenic Escherichia coli (EPEC) and enterohemorrhagic E. coli (EHEC), remains a significant...

Mice Lacking T and B Lymphocytes Develop Transient Colitis and Crypt Hyperplasia yet Suffer Impaired Bacterial Clearance during Citrobacter rodentium Infection

Vallance, Bruce A., Deng, Wanyin, Knodler, Leigh A., Finlay, B. Brett

The bacterial pathogen Citrobacter rodentium belongs to a family of gastrointestinal pathogens that includes enteropathogenic and enterohemorrhagic Escherichia coli and is the causative agent of...

Modulation of Inducible Nitric Oxide Synthase Expression by the Attaching and Effacing Bacterial Pathogen Citrobacter rodentium in Infected Mice

Vallance, Bruce A., Deng, Wanyin, De Grado, Myriam, Chan, Crystal, Jacobson, Kevan, Finlay, B. Brett

Citrobacter rodentium belongs to the attaching and effacing family of enteric bacterial pathogens that includes both enteropathogenic and enterohemorrhagic Escherichia coli. These bacteria infect...

Host–pathogen interactions: Host resistance factor Nramp1 up-regulates the expression of Salmonella pathogenicity island-2 virulence genes

Zaharik, Michelle L., Vallance, Bruce A., Puente, José L., Gros, Philippe, Finlay, B. Brett

Nramp1 (Natural resistance-associated macrophage protein-1; also known as Slc11a1) is a host resistance gene that provides protection against several intracellular pathogens, including Salmonella...

Host Susceptibility to the Attaching and Effacing Bacterial Pathogen Citrobacter rodentium

Vallance, Bruce A., Deng, Wanyin, Jacobson, Kevan, Finlay, B. Brett

Many studies have shown that genetic susceptibility plays a key role in determining whether bacterial pathogens successfully infect and cause disease in potential hosts. Surprisingly, whether host...

Dissecting virulence: Systematic and functional analyses of a pathogenicity island

Deng, Wanyin, Puente, José L., Gruenheid, Samantha, Li, Yuling, Vallance, Bruce A., Vázquez, Alejandra, ...

Bacterial pathogenicity islands (PAI) often encode both effector molecules responsible for disease and secretion systems that deliver these effectors to host cells. Human enterohemorrhagic...

Clearance of Citrobacter rodentium Requires B Cells but Not Secretory Immunoglobulin A (IgA) or IgM Antibodies

Maaser, Christian, Housley, Michael P., Iimura, Mitsutoshi, Smith, Jennifer R., Vallance, Bruce A., Finlay, B. Brett, ...

Citrobacter rodentium, a murine model pathogen for human enteropathogenic Escherichia coli, predominantly colonizes the lumen and mucosal surface of the colon and cecum and causes crypt hyperplasia...

SseK1 and SseK2 Are Novel Translocated Proteins of Salmonella enterica Serovar Typhimurium

Kujat Choy, Sonya L., Boyle, Erin C., Gal-Mor, Ohad, Goode, David L., Valdez, Yanet, Vallance, Bruce A., ...

Salmonella enterica is a gram-negative, facultative intracellular pathogen that causes disease symptoms ranging from gastroenteritis to typhoid fever. A key virulence strategy is the translocation of...

Modulation of Host Cytoskeleton Function by the Enteropathogenic Escherichia coli and Citrobacter rodentium Effector Protein EspG

Hardwidge, Philip R., Deng, Wanyin, Vallance, Bruce A., Rodriguez-Escudero, Isabel, Cid, Victor J., Molina, Maria, ...

EspG is a conserved protein encoded by the locus of enterocyte effacement (LEE) of attaching and effacing (A/E) pathogens, including enteropathogenic and enterohemorrhagic Escherichia coli and...

Salmonella enterica Serovar Typhimurium Pathogenicity Island 2 Is Necessary for Complete Virulence in a Mouse Model of Infectious Enterocolitis

Coburn, Bryan, Li, Yuling, Owen, David, Vallance, Bruce A., Finlay, B. Brett

Salmonella species cause a wide range of disease in multiple hosts. Salmonella enterica serovar Typhimurium causes self-limited intestinal disease in humans and systemic typhoid-like illness in...

Cloning Vectors and Fluorescent Proteins Can Significantly Inhibit Salmonella enterica Virulence in Both Epithelial Cells and Macrophages: Implications for Bacterial Pathogenesis Studies

Knodler, Leigh A., Bestor, Aaron, Ma, Caixia, Hansen-Wester, Imke, Hensel, Michael, Vallance, Bruce A., ...

Plasmid vectors and fluorescent protein reporter systems are commonly used in the study of bacterial pathogenesis. Here we show that they can impair the ability of Salmonella enterica serovar...

Salmonella Pathogenicity Island 2 Is Expressed Prior to Penetrating the Intestine

Brown, Nat F, Vallance, Bruce A, Coombes, Brian K, Valdez, Yanet, Coburn, Bryan A, Finlay, B. Brett

Salmonella enterica serovar Typhimurium is a facultative intracellular pathogen that causes disease in mice that resembles human typhoid. Typhoid pathogenesis consists of distinct phases in the...

Toll-Like Receptor 4 Contributes to Colitis Development but Not to Host Defense during Citrobacter rodentium Infection in Mice

Khan, Mohammed A., Ma, Caixia, Knodler, Leigh A., Valdez, Yanet, Rosenberger, Carrie M., Deng, Wanyin, ...

Enteropathogenic Escherichia coli (EPEC) and enterohemorrhagic E. coli (EHEC) are noninvasive bacterial pathogens that infect their hosts' intestinal epithelium, causing severe diarrheal disease....

Genetic profiling of dendritic cells exposed to live- or ultraviolet-irradiated Chlamydia muridarum reveals marked differences in CXC chemokine profiles

Zaharik, Michelle L, Nayar, Tarun, White, Rick, Ma, Caixia, Vallance, Bruce A, Straka, Nadine, ...

Chlamydia trachomatis is a major cause of sexually transmitted disease worldwide for which an effective vaccine is being actively pursued. Current vaccine efforts will be aided by elucidating the...

A Novel Secretion Pathway of Salmonella enterica Acts as an Antivirulence Modulator during Salmonellosis

Gal-Mor, Ohad, Gibson, Deanna L., Baluta, Dan, Vallance, Bruce A., Finlay, B. Brett

Salmonella spp. are Gram-negative enteropathogenic bacteria that infect a variety of vertebrate hosts. Like any other living organism, protein secretion is a fundamental process essential for various...

Modulation of Intestinal Goblet Cell Function during Infection by an Attaching and Effacing Bacterial Pathogen▿

Bergstrom, Kirk S. B., Guttman, Julian A., Rumi, Mohammad, Ma, Caixia, Bouzari, Saied, Khan, Mohammed A., ...

The attaching and effacing (A/E) bacterial pathogens enteropathogenic Escherichia coli and enterohemorrhagic E. coli and the related mouse pathogen Citrobacter rodentium colonize their hosts'...

Flagellin-Dependent and -Independent Inflammatory Responses following Infection by Enteropathogenic Escherichia coli and Citrobacter rodentium▿

Khan, Mohammed A., Bouzari, Saeid, Ma, Caixia, Rosenberger, Carrie M., Bergstrom, Kirk S. B., Gibson, Deanna L., ...

Enteropathogenic Escherichia coli (EPEC) and the murine pathogen Citrobacter rodentium belong to the attaching and effacing (A/E) family of bacterial pathogens. These noninvasive bacteria infect...