Texas Tech University

Kai Zhang

Associate Professor

Email: kai.zhang@ttu.edu

Phone: 1(806)834-0550

Office: Biology 205

Lab: Biology 203, 204

  • Postdoc: Molecular parasitology, Washington University School of Medicine, St. Louis, MO (2000-2006).
  • Ph.D., Cellular and Microbial Biology, The Catholic University of America, Washington, DC. (2000)
  • BSc., Biochemistry and Molecular Biology, Peking University, Beijing, China (1996)

Teaching:

  • MBIO 3401: Principles of Microbiology (bio-major)
  • MBIO 3400: Microbiology (non bio-major)
  • MBIO4367/MBIO6367: Molecular Pathogenesis of  Protozoans (undergraduate/graduate, Communication Literacy Requirement)

Web Links:

Kai Zhang

Research Interests

Protozoan parasites of the genus Leishmania alternate between flagellated promastigotes in sandfly vectors and non-flagellated amastigotes residing in mammalian macrophages. They are the causative agents for a group of devastating diseases (leishmaniasis) infecting 10-12 million people worldwide. Current drugs for leishmaniasis are plagued with low efficacy and high toxicity. With resistance on the rise and no safe vaccine available, there is a pressing need to maintain a steady stream of new drugs and drug targets. Our long term goal is to decipher the molecular strategy utilized by Leishmania parasites to thrive in the harsh environments in sandflies and mammals. Understanding the fundamental mechanism of pathogenesis can lead to new and improved treatments.

Leishmania parasites are easy to culture and highly amenable to genetic manipulations. Genomes of several Leishmania species have been fully sequenced and annotated, providing excellent opportunities to study various genes/pathways that are relevant to parasite virulence. My lab focuses on the role of lipid metabolism and acquisition in Leishmania pathogenesis. Lipids are essential components of life. They exert important functions in membrane biology, energy conservation, protein modification, and signal transduction. The role of lipids is relatively understudied in protozoan parasites. My lab utilizes a combination of molecular biology, cell biology, animal models and lipidomic approaches to uncover the significance of sphingolipids, phospholipids, and sterols in Leishmania survival and virulence. A better understanding of lipid metabolism will not only advance our knowledge on the basic biology of Leishmania parasites, but also facilitate the development of novel drugs.

If you are interested in doing innovative research in Leishmania parasites as a postdoc, graduate student, or undergraduate student, please contact Dr. Kai Zhang for more information!

Selected Publications

  • Xu, W., Mukherjee, S., Ning, Y., Hsu, F. F., Baykal, E., Huang, J., and Zhang, K. (2017) Cyclopropane fatty acid synthesis affects cell shape and acid resistance in Leishmania mexicana. International Journal for Parasitology in press. 
  • Pawlowic, M. C., Hsu, F.F., Moitra, S., Biyani, N., and Zhang, K. (2016) Plasmenylethanolamine synthesis in Leishmania major.Mol. Microbiol. 101(2):238-49. PMCID: PMC4935589.
  • Xu, W., Hsu, F. F., Baykal, E., Huang, J., and Zhang, K. (2014) Sterol biosynthesis is required for heat resistance but notextracellular survival in LeishmaniaPLoS Pathogens. 10(10):e1004427. PMCID: PMC4207814.
  • Zhang, O., Hsu, F. F., Xu, W., Pawlowic, M.C., and Zhang, K. (2013) Sphingosine kinase A is a pleiotropic and essential enzyme for Leishmania survival and virulence. Mol. Microbiol90(3):489-501. PMCID: PMC3938578. 
  • Pillai, A. B., Xu, W., Zhang, O., and Zhang,K. (2012) Sphingolipid Degradation in Leishmania (Leishmania) amazonensisPLoS Negl Trop Dis. 6(12):e1944. PMCID: PMC3527339.
  • Pawlowic, M. C., and Zhang, K. (2012) Leishmania parasites possess a platelet-activating factor acetylhydrolase important for virulence. Mol Biochem Parasitol. PMCID: PMC3492548.
  • Zhang, O, Xu, W., Pillai, A., and Zhang, K. (2012) Developmentally Regulated Sphingolipid Degradation in Leishmania majorPLoS One. 7(1):e31059. PMCID: PMC3267774.  
  • Xu, W., Xin, L., Soong, L., and Zhang, K. (2011)Sphingolipid degradation by Leishmania is required for its resistance to acidic pH in the mammalian host. Infect Immun. 79(8):3377-87.PMCID: PMC3147570.  
  • Zhang, K., and Beverley, S. M. (2010) Phospholipid and sphingolipid metabolism in Leishmania. Mol. Biochem. Parasitol. 170(2):55-64. PMCID: PMC2815228.
  • Zhang, K., Bangs, J. D., and Beverley, S.M. (2010) Sphingolipids in parasitic protozoa. Adv Exp MedBiol. 688:238-48. PMCID: PMC2951629.  
  • Zhang, O., Wilson, M. C., Xu, W., Hsu, F.F., Turk, J., Kuhlmann, F. M., Wang, Y., Soong, L., Key, P., Beverley, S. M.,and Zhang, K. (2009) Degradation of Host Sphingomyelin Is Essential for Leishmania Virulence. PLoS Pathogens 5(12): e1000692.doi:10.1371/journal.ppat.1000692. PMCID: PMC2784226.
  • Sutterwala, S. S., Hsu, F. F., Sevova, E.S.,Schwartz, K. J., Zhang, K., Key, P., Turk, J., Beverley, S. M., and Bangs,J.D. (2008) Developmentally Regulated Sphingolipid Synthesis in African Trypanosomes. Mol. Microbiol70(2):281-296. PMCID: PMC2629665.
  • Hsu, F. F., Turk, J., Zhang, K., and Beverley,S. M. (2007) Characterization of Inositol Phosphorylceramides from Leishmania major by Tandem Mass Spectrometry with Electrospray Ionization. J Am Soc Mass Spectrom 18(9):1591-604. PMCID: PMC2065762.  
  • Zhang, K., Pompey, J. M, Hsu, F.F., Key, P.,B and Bandhuvula P., Saba, J. D., Turk, J., and Beverley, S. M. (2007) Redirection of sphingolipid metabolism towards de novo synthesis of ethanolamine in the protozoan parasite Leishmania majorEMBOJ 26:1094-1104. PMCID: PMC1852826.
  • Zhang, K., Hsu, F. F., Scott, D. A., Docampo,R., Turk, J., and Beverley, S. M. (2005) Leishmania salvage and remodeling of host sphingolipids in amastigote survival and acidocalcisome biogenesis. Mol.Microbiol.55(5): 1566-78. PMCID: PMC3803142.
  • Zhang, K., Barron, T., Turco, S. J., and Beverley,S. M. (2004) The LPG1 gene family of Leishmania majorMol. Biochem. Parasitol.136(1):11-23. PMCID: PMC3791616. 
  • Zhang, K., Showalter, M., Revollo, J., Hsu,F.F., Turk, J., and Beverley, S. M. (2003) Sphingolipids are essential for differentiation but not growth in LeishmaniaEMBOJ 22:6016-6026. PMCID: PMC275442.
  • Descoteaux, A., Avila, H. A.,Zhang, K.,Turco,S. J., and Beverley, S. M. (2002) Leishmania LPG3 encodes a GRP94 homolog required for phosphoglycan synthesis implicated in parasite virulence but not viabilityEMBO J 21: 4458-69. PMCID: PMC126187.
  • Zhang, K., and Rathod, P. K. (2002) Divergent regulation of dihydrofolate reductase between malaria parasite and human host. Science 296:545-7. PMCID:PMC3830934.
  • Shallom, S., Zhang, K., Jiang, L., and Rathod,P. K. (1999) Essential protein-protein interactions between Plasmodium falciparum thymidylate synthase and dihydrofolate reductase domains. J Biol Chem.274(53):37781-6. PMCID: PMC3791593.

Department of Biological Sciences

  • Address

    Department of Biological Sciences, Texas Tech University, Box 43131 Lubbock, TX 79409
  • Phone

    806.742.2715
  • Email

    biology@ttu.edu