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Virginia L. MillerProfessor 8260 McDonnell Pediatric Research Building |
My laboratory uses Yersinia, and Klebsiella as model systems to study bacterial pathogenesis. The long-term goals of our work are to understand the bacteria-host interaction at the molecular level, to learn how this interaction affects the pathogenesis of infections and to understand how these pathogens co-ordinate the expression of virulence determinants during an infection. To do this we use genetic, molecular and immunological approaches, in conjunction with the mouse model of infection.
We have applied several genetic approaches to identify new virulence genes of Y. enterocolitica and are currently characterizing these genes, their products, and their role in disease. We also have been studying the invasion gene inv, with a focus on understanding the mechanism of regulation of expression of inv and the co-ordination of its expression with other virulence genes. An inv regulatory gene, rovA, has been identified that regulates expression of inv in the laboratory and during an infection. RovA also regulates expression of other novel virulence determinants that influence the early inflammatory response to Yersinia infection. Recently we extended the analysis of RovA to Yersinia pestis, the causative agent of bubonic and pneumonic plague, and found that RovA is also required for full virulence of Y. pestis. Microarray analysis is being used to identify the RovA regulated genes in Y. pestis and Y. enterocolitica.
Type III secretion systems (T3SS) are a means by which Gram negative pathogens deliver effector proteins into host cells. One of the first, and best, characterized systems is encoded on the virulence plasmid of the yersiniae. However, a second T3SS was recently identified on the chromosome of Y. enterocolitica. We identified some of the key players in the regulation of expression of this system and have begun to identify the effectors secreted by the system. The long-term goals are to understand the role of this system and the individual effectors in the biology of Y. enterocolitica.
For Klebsiella we have developed a mouse model of infection using an intranasal inoculation method. A bank of 5,000 transposon mutants have been isolated and screened in this intranasal model of infection for mutations that alter the ability of Klebsiella to either colonize the lung or spread from the lung to the spleen. A subset of these mutants is currently being studied in more detail.
Students interested in Ph.D. Programs in Biology and Biomedical Sciences at Washington University should consult the following websites:
| Date and place of birth: April 28, 1958; Tripoli, Libya Citizenship: U.S.A. |
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Present Position |
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| Professor of the Departments of Molecular Microbiology and Pediatrics, Washington University School of Medicine, 11/00 - present |
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Education |
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| 9/75 - 12/79 | B.A.Biological Sciences, University of California, Santa Barbara |
| 9/80 - 9/85 | Ph.D.,Harvard University Microbiology & Molecular Genetics Thesis Advisor: Dr. John J. Mekalanos |
| 10/85 - 6/88 | Postdoctoral Fellow at Stanford University Medical Microbiology PI: Dr. Stanley Falkow |
Academic Positions/Employment |
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| 6/88 - 7/94 | Assistant Professor Dept. Microbiology & Molecular Genetics and the Molecular Biology Institute, UCLA |
| 7/94 - 12/96 |
Associate Professor Dept. of Microbiology & Molecular Genetics and the Molecular Biology Institute, UCLA |
| 10/96 - 10/00 | Associate Professor Depts. of Pediatrics and Molecular Microbiology, Washington University School of Medicine |
Honors and Awards |
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| 9/75-12/79 | Chancellor's Scholarship, University of California at Santa Barbara |
| 8/80-6/83 | National Research Service Award, Harvard University |
| 10/85-6/88 | Damon Runyon-Walter Winchell Cancer Fund, Stanford University |
| 7/89-6/93 | Pew Scholar in Biomedical Sciences |
| 7/94-6/99 | Research Career Development Award, National Institutes of Health |
| 7/01 - 6/03 | ASM Foundation Lecturer |
| 7/02-6/05 | Nat Sternberg Prize Committee |
| elected 2003 | American Academy of Microbiology Fellow |
Editorial and Review Responsibilities |
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| J. Bacteriology - Editorial Board Member (1992 -1997) | |
| Infection & Immunity - Editorial Board Member (1994-2002) | |
| International Journal of Medical Microbiology - Advisory Board (1999-present) | |
| Current Opinion in Microbiology - Editorial Board Member (1998-present) | |
| Molecular Microbiology - Senior Editor (1993 - 2006) | |
| Faculty of 1000 (2001 - present) | |
| Science - Board of Reviewing Editors (2005 - present) | |
| Ad hoc reviewer for: J. Clinical Microbiology, Microbial Pathogenesis, Proc. Natl. Acad. Sci. USA, Science, Vaccine, J. Biological Chemistry, Trends in Microbiology, J. Exp. Medicine, NIH, USDA-SBIR, National Science Foundation, Veterans Administration, Wellcome Trust, Thrasher Research Fund, Swiss National Science Foundation, Idaho State Board of Education, W. M. Keck Foundation | |
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| Keystone Meeting "Molecular Events in Microbial Pathogenesis", Santa Fe, NM | January 1994 |
| Midwest Microbial Pathogenesis Meeting, St. Louis, MO | September 1998 |
| 5th FASEB meeting on Microbial Pathogenesis, (Vice Chair), Snowmass, CO | August 2002 |
| 6th FASEB meeting on Microbial Pathogenesis, (Chair), Snowmass, CO | August 2004 |
| 4th ASM Biodefense Research Meeting, (Vice Chair), Washington, DC | February 2006 |
| 5th ASM Biodefense Research Meeting (Co-Chair), Washington, DC | February 2007 |
Professional Societies and Organizations |
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| 1986 - present | Member, American Society for Microbiology |
| 1986 - present | Member, American Association for the Advancement of Science |
| 7/05 - 6/08 | American Academy of Microbiology, Distinguished Service Award Selection Committee (Chair) |
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Return to Molecular Microbiology Home Page |
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Department of Molecular Microbiology, Box 8230 |
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| Tel 314-362-7250, FAX 314-362-1232 | |