Bethany Janowski, PhD

Assistant Professor
Pharmacology
Graduate Program: Biological Chemistry

Contact Information

UT Southwestern Medical Center
5323 Harry Hines Boulevard
Dallas, Texas 75390

Office Phone: 214-645-6127
Office Fax: 214-645-6131

bethany.janowski@utsouthwestern.edu

Biography

Dr. Bethany Janowski received her BS from the University of Wisconsin in 1988 and a MS in Biological Sciences, with an emphasis in neuroendocrinology in 1990. Dr. Janowski moved to Dallas in 1993 to attend graduate school at UT Southwestern. She joined the lab of Dr. Mangelsdorf in the Department of Pharmacology. While in graduate school, Dr. Janowski discovered that oxidized cholesterol was the ligand for the "orphan" nuclear hormone receptor, LXR. This discovery correctly suggested that LXR was a key regulator of cholesterol homeostasis. Her identification and extensive study of these oxidized cholesterol ligands for the LXR receptor became the foundation for medicinal chemistry/drug development for LXR. In 1998 she was awarded the Alfred Gilman Award in Pharmacology and in 1999 received her PhD in Cell and Molecular Biology in 1999. Postdoctoral training included further study in cholesterol regulation in the Department of Molecular Genetics, and developing new strategies for silencing gene expression in the Center for Biomedical Inventions at UT Southwestern.

Dr. Janowski joined the faculty in the Department of Pharmacology in 2004. In 2005 she discovered that RNA silences endogenous genes at the level of the chromosome. In 2007 she discovered that RNA can specifically activate gene expression inside cells. Her current research focuses on studying how endogenous regulatory RNAs regulate nuclear hormone receptor gene expression inside cells.

Education

Graduate SchoolUniversity of Texas Southwestern Med Ctr Dallas (1999)
Graduate SchoolUniversity of Wisconsin-Milwaukee (1990)
UndergraduateUniversity of Wisconsin-Milwaukee, Zoology (1988)

Research Interests

Developing novel technology to selectively activate or silence genes within chromosomal DNA
Mechanisms controlling recognition of DNA and gene transcription
Recognition of chromosomal DNA by synthetic molecules
Using new technology to study nuclear hormone receptors

Publications

Featured
The hypocholesterolemic agent LY295427 upregulates INSIG-1, identifying the INSIG-1 protein as a novel mediator of cholesterol homeostasis through SREBP.

Janowski, B. A. , Proceedings of the National Academy of Sciences , October 2002; (99):12675-80

Featured
Identification of a signaling pathway mediated by the nuclear receptor, LXR alpha.

Janowski, B.A., Willy, P.J., Rama Devi, T., Falck, J.R., Mangelsdorf, D.J. , Nature , October 1996; (383):728-731

Featured
Cholesterol and bile acid metabolism are impaired in mice lacking the nuclear receptor LXR alpha.

Peet, D.J., Turley, S.D., Ma, W., Janowski, B.A., Lobaccaro, J.A., Hammer, R.E., Mangelsdorf, D.J. , Cell , May 1998; (93):693-704

Featured
Structural requirements of ligands for the oxysterol receptors LXR alpha and beta

Janowski, B.A., Grogan, M.J., Jones, S., Wisely, G.B., Kliewer, S.A., Corey, E.J., Mangelsdorf, D.J. , Proceedings of the National Academy of Sciences , January 1999; (96):266-271

Involvement of AGO1 and AGO2 in mammalian transcriptional gene silencing

Janowski, B.A., Huffman, K.E., Schwartz, J.C., Ram, R., Shames, D.S., Minna, J.D., Corey, D.R. , Nature Structural and Molecular Biology , September 2006; (13):787

Inhibiting transcription of chromosomal DNA with antigene peptide nucleic acids.

Janowski, B. A., Kaihatsu, K., Huffman, K. E., Schwartz, J., Ram, R., Hardy, D., Mendelson, C.R., and Corey, D. R. , Nature Chemical Biology , September 2005; (1):210-215

Inhibiting gene expression at transcription start sites in chromosomal DNA with antigene RNAs.

Janowski, B. A., Huffman, K. E., Schwartz, J., Ram, R., Hardy, D., Shames, D. S., Minna, J. D., and Corey, D. R. , Nature Chemical Biology , September 2005; (1):216-222

Activating gene expression in mammalian cells with promoter-targeted duplex RNAs

Janowski, B.A., Younger, S.T., Hardy, D.B., Ram, R., Huffman, K.E., Corey, D.R. , Nature Chemical Biology , March 2007; (3):166

Antisense transcripts are targets for activating small RNAs.

Schwartz, J. C., Younger S. T., Nguyen N., Hardy D., Prakash T., Bhat B., Monia B., Corey D.R. and *Janowski B.A. , Nature Structural & Molecular Biology , January 2008; (15):842-848

Honors/Awards

Awarded High Impacrt/High Risk Grant, Dean’s Office, UTSW

Mechanism of Promoter-Directed RNAs on Gene Transcription (2008)

Awarded Research Grant, Harold Simmons Comprehensive Cancer Center, UTSW

RNA Switches at Gene Promoters: Turning off Cancer Cell Proliferation (2008)

Plenary lecture, 4th International Symposium on Nucleic Acids Chemistry, Kyushu University, Japan

Using RNA to turn off genes within chromosomal DNA (2005)

Alfred Gilman Award

Best Ph.D. thesis in the Department of Pharmacology (1998)

Invited speaker, Hormone Action Gordon Conference

Presented Ph.D. thesis work: discovery of new cholesterol signaling pathway (1998)