Professor, Department of Microbiology and Molecular Genetics
Education & Training
- Postdoctoral Fellow
- MIT Whitehead Institute
- Duke University, 1997
Dr. Lorenz is a native of Atlanta whose first research experiences in infectious diseases was at the Centers for Disease Control and Prevention studying malaria and HIV. He received his B.A. in Biochemistry and Cell Biology from Rice University. He then joined the Ph.D. Program in Cellular and Molecular Biology at Duke University, studying signaling pathways that regulate differentiation in the model yeast Saccharomyces cerevisiae in the laboratory of Dr. Joseph Heitman. He began research in Candida with Dr. Gerald Fink at the Whitehead Institute for Biomedical Research in Cambridge, MA. He has been on faculty at the University of Texas Medical School since 2003.
Understanding the molecular basis of fungal infections
Infectious diseases are one of the most challenging aspects of microbiology. Their toll on human health remains immense and emerging drug resistance puts us at risk of backsliding on a century of progress in treating these diseases. Fungi are often overlooked as infectious agents, despite causing a spectrum of diseases ranging from mild and common to life-threatening infections responsible for over one million deaths per year. Candida albicans is the most important fungal pathogen, as it is capable of infecting virtually any body site, including the mouth and throat (oral thrush) and the genital tract (vaginal yeast infections), but our primary interest is in the life threatening infections that occur mostly in hospitalized patients with weakened immune systems. Increasingly frequent, about 40% of those who get disseminated candidiasis will die, making it as deadly as HIV/AIDS and MRSA in this country. Unlike these infections, however, patients acquire candidiasis from themselves: C. albicans is also a universal part of the human microbiota, existing harmlessly in most of us.
Healthy individuals are protected from candidiasis by their innate immune system and our lab studies the dynamic and fascinating interaction of C. albicans with phagocytic cells. C. albicans dramatically alters macrophage function, by inhibiting production of antimicrobial compounds like nitric oxide and remodeling the phagolysosome, eventually allowing the fungal cell to adopt an filamentous morphology and escape the phagocyte. We seek to understand how this important pathogen has adapted its metabolism, stress responses, and physiology to contribute to its ability to cause disease, with an ultimate goal of identifying ways to better diagnose and treat these infections.
Vylkova, S. and Lorenz, M.C. (2014) Modulation of phagosomal pH by Candida albicans promotes hyphal morphogenesis and requires Stp2p, a regulator of amino acid transport. PLoS Pathog. 10:e1003995. PMID: 24626429.
Graham, C.E., Cruz, M.R., Garsin, D.A., and Lorenz, M.C. (2017) The Enterococcus faecalis bacteriocin EntV inhibits hyphal morphogenesis, biofilm formation, and virulence of Candida albicans. Proc. Nat. Acad. Sci. USA 114:4507-12. PMID: 28396417.
Danhof, H.A.*, Vylkova, S.*, Vesely, E., Ford, A.E., and Lorenz, M.C. (2016) Robust environmental alkalinization by Candida albicans during growth on dicarboxylic acids. mBio 7:e01646-16. PMID: 27935835.
Miramón, P. and Lorenz, M.C. (2016) The SPS amino acid sensor mediates nutrient acquisition and immune evasion in Candida albicans. Cell. Microbiol. 18:1611-24.
Danhof, H.A. and Lorenz., M.C. (2015) The Candida albicans ATO gene family promotes neutralization of the macrophage phagolysosome. Infect. Immun. 83:4416-26. PMID: 26351284.
Priest, S.P. and Lorenz, M.C. (2015). Characterization of virulence-related phenotypes in Candida species of the CUG clade. Eukaryot. Cell. 14:931- 40. PMID: 26150417.