Lee Ratner, M.D., Ph.D.
Pathology and Immunology
Molecular Microbiology and Microbial Pathogenesis Program
Molecular Genetics and Genomics Program
562 McDonnell Medical Sciences Building
lymphocytes, virology, AIDS, leukemia, HIV, HTLV, NF kB
Molecular biology and pathogenesis of HIV and HTLV
My laboratory is involved in a molecular dissection of virus-cell interactions. We focus on two retroviurses: Human T-Cell Leukemia Virus Type 1 (HTLV-1) which causes a specific form of lymphoma, and Human Immunodeficiency Viruses (HIV) Types 1 and 2. Our studies of HTLV-1 are concerned with analysis of the mechanisms of leukemogenesis through studies of: transforming determinants in an infectious immortalizing HTLV-1 proviral clone; transgenic models utilizing the HTLV-1 trans-activator protein, which results in a lymphoproliferative malignancy; humanized mice; and identification and characterization of the receptor for the virus.
Our studies of HIV-1 focus on two distinct questions: 1) How does viral protein X (Vpx) enhance virus replication in quiescent cells? 2) How does the envelope glycoprotein interact with the receptor (CD4) and coreceptor (CXCR4 or CCR5) to allow virus entry? For these studies, we utilize infectious molecular clones of HIV-1 and HIV-2, cell culture and animal studies, small molecule and siRNA inhibitors, as well as viral and cellular cofactor mutants.
Information from these studies has been applied to developing novel therapeutic approaches for HTLV-1 and HIV-1 infections.
Kyei GB, Cheng X, Ramani, R, Ratner L. 2015. Cyclin L2 is a critical HIV dependency factor in macrophages that controls SAMHD1 abundance. Cell Host Microbe, 17:98-106 , PMID: 25532805, PMCID: PMC4297224.
Baydoun HH, Cherian MA, Green PL, Ratner L. 2015. Inducible nitric oxide synthase mediates DNA double strand breaks in HTLV-1 induced leukemia/lymphoma Retrovirology, 12:71. PMID: 26265053, PMCID: PMC4534112
Rauch DA, Harding JC, Ratner L. 2014. IL-15 deficient Tax mice reveal a role for IL-1alpha in tumor immunity. PLOS One, 9:e85028, PMID: 24416335, PMCID: PMC3885672
Cheng X, Ratner L 2014. HIV-2 Vpx interacts with IRF5 inhibits its function. J Biological Chemistry, 289:9146-9157 PMID:24532789, PMCID: PMC3979364
McCulley A, Ratner L (2012). HIV-2 viral protein X (Vpx) ubiquitination is dispensable for ubiquitin ligase interaction and effects on macrophage infection. Virology, 427:67-75 PMCID:PMC3302174.
Belshan M, Kimata J, Brown C, Cheng X, McCulley A, Larsen A, Thippeshappa R, Hodara V, Giavedoni L, Hirsch V, Ratner L (2012). Vpx is critical for SIVmne infection of pigtail macaques. Retrovirology, 9:32. PMCID:PMC3353869
Seegulam, ME, Ratner L (2011). Integrase inhibitors effective againt human T-cell leukemia virus type 1. Antimicrobial Agents and Chemotherapy. 55:2011
Choudhary G, Ratner L. The HTLV-1 hbz antisense gene indirectly promotes tax expression via down-regulation of p30II mRNA. Virology, 2011; 410: 307-315. PMCID: PMC3034254
Harmon B, Campbell N, Ratner L (2010). Role of Abl kinase and the Wave2 signaling complex in HIV-1 entry at a post-hemifusion step. PLOS Pathogens 6:e1000956.
Gross S, Rauch D, Harding J, Heinecke JW, Ratner L, Piwnica-Worms D (2009) Bioluminescence imaging of myeloperoxidase activity in vivo. Nature Med 15:455.
Last Updated: 8/21/2015 9:42:06 AM