Mobile Menu

Juliette Tinker

Associate Professor, Department of Biological Sciences
Year arrived at BSU: 2005

Mailing Address:
Department of Biology
Boise State University
Boise, ID 83725-1515

Office Location: Science Building, Room 229
Office Number: 208-426-5472
Office Fax: 208-426-1040

E-Mail Address: juliettetinker@boisestate.edu

ACADEMIC DEGREES

B.S. , Washington University, 1994
Ph.D., University of Iowa, 2000
Postdoctoral fellow, University of Colorado Health Sciences Center, 2000-2005

TEACHING

BIOL 205 Microbiology
BIOL 410/510  Pathogenic Microbiology
BIOL 444/544  Vaccinology

RESEARCH INTERESTS

My research has focused on the development and characterization of bacterial enterotoxins as molecular tools and mucosal vaccine adjuvants. The protein toxin secreted by the bacterium Vibrio cholerae, cholera toxin (CT), has long been known as a potent immunomodulator. When administered orally with other antigens of interest, this toxin can elicit a strong antibody response directed to the antigen of interest, indicating it has potential to act as an important oral vaccine adjuvant. Vaccine adjuvants are much needed “helpers” to stimulate immune responses to poorly immunogenic antigens. To date, there are very few vaccine adjuvants approved for use in humans, and there are no approved adjuvants that are effective when delivered orally. Bacterial enterotoxins, including CT and the E.coli heat-labile toxins (LTI and LTII), are extremely potent adjuvants when delivered orally in animal models, however, they are toxic, and not applicable for humans. My laboratory has constructed A2/B chimeras that eliminate the toxic portion of the CT molecule while retaining the receptor-binding and adjuvant activity of the molecule. We have produced A2/B chimeras containing antigens from Staphylococcus aureus and characterized this potential human mucosal vaccine in mice. In addition, we are currently characterizing this vaccine in cows as a potential veterinary vaccine to eliminate S. aureus mastitis. Lastly, we are characterizing novel AB type enterotoxins in other important pathogens, including Salmonella enteriditis.  We interested in better understanding the trafficking and interaction of these molecules with eukaryotic cells, as well as characterizing novel bacterial toxins that may act as important modulators of the immune system.

RECENT PUBLICATIONS

Arlian, B.A. and J.K. Tinker. (2011) Mucosal Immunization with a Staphylococcus aureus IsdA-cholera toxin A2/B chimera induces antigen specific Th2 type responses in mice. Clinical and Vaccine Immunology. 18(9):1543-1551.

Tinker, J.K., Davis, C.T and B.A. Arlian. (2010) Purification and characterization of Yersinia enterocolitica and Yersinia pestis-cholera toxin A2/B chimeras. Protein Expression and Purification. 74(1):16-23

Feris, K., Otto, C., Tinker, J., Wingett, D., Punnoose, A., Thurber, A., Kongara, M., Sabetian, M., Quinn, B., Hanna, C., and D. Pink (2009) Electrostatic Interactions Affect Nanoparticle-Mediated Toxicity to Gram-Negative Bacterium Pseudomonas aeruginosa PAO1. Langmuir 16:26(6):4429-36.

Tinker, J. K., J. L. Erbe and R. K. Holmes. (2005) Characterization of fluorescent chimeras of cholera toxin and Escherichia coli heat-labile enterotoxins produced by use of the twin arginine translocation system. Infect Immun 73(6): 3627-3635.

Tinker, J. K., J. L. Erbe, et al. (2003) Cholera holotoxin assembly requires a hydrophobic domain at the A-B5 interface: mutational analysis and development of an in vitro assembly system. Infect Immun 71(7): 4093-101.

Yeh, K. S., J. K. Tinker, et al. (2002) FimZ binds the Salmonella typhimurium fimA promoter region and may regulate its own expression with FimY. Microbiol Immunol 46(1): 1-10.

Tinker, J. K., L. S. Hancox, et al. (2001) FimW is a negative regulator affecting type 1 fimbrial expression in Salmonella enterica serovar typhimurium. J Bacteriol 183(2): 435-42.

Tinker, J. K. and S. Clegg (2001) Control of FimY translation and type 1 fimbrial production by the arginine tRNA encoded by fimU in Salmonella enterica serovar Typhimurium. Mol Microbiol 40(3): 757-68.

Tinker, J. K. and S. Clegg (2000) Characterization of FimY as a coactivator of type 1 fimbrial expression in Salmonella enterica serovar Typhimurium. Infect Immun 68(6): 3305-13.