Frank S. Lee

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Associate Professor of Pathology and Laboratory Medicine
Staff Pathologist, Medical Pathology Section, Division of Anatomic Pathology, Department of Pathology and Laboratory Medicine, Hospital of the University of Pennnsylvania
Department: Pathology and Laboratory Medicine

Contact information
Department of Pathology and Laboratory Medicine
University of Pennsylvania School of Medicine
605 Stellar Chance Labs
422 Curie Boulevard
Philadelphia, PA 19104
Office: (215) 898-4701
Fax: (215) 573-2272
Graduate Group Affiliations
Education:
B.A. (Biochemistry)
Harvard College , 1983.
M.D. (Medicine)
Harvard Medical School, 1991.
Ph.D. (Biological Chemistry)
Harvard University, 1991.
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Description of Research Expertise

Research Interests: Molecular mechanisms of the hypoxic response.

Key words: hypoxia, HIF, PHD2, prolyl hydroxylation, gene regulation

Research Details: An important cellular response to hypoxia is the activation of the transcription Hypoxia Inducible Factor (HIF). HIF is a master regulator of the hypoxic response and upregulates many genes involved in hypoxic adaptation, including those encoding for enzymes of glycolysis, glucose transporters, erythropoietin, and vascular enthothelial growth factor. We are interested in the regulation and physiologic importance of this pathway. We and others have shown that HIF is regulated by a distinctive mechanism. Under normoxic conditions, the alpha subunit of HIF (HIF-α) is site-specifically hydroxylated on proline, which in turn constitutively targets HIF-α for degradation by the ubiquitin-proteasome pathway. Under hypoxic conditions, this modification is inhibited, thereby allowing HIF-α to escape degradation and activate transcription. We are interested in characterizing novel regulators of the HIF pathway, determining whether prolyl hydroxylation plays a more general role in the hypoxic response, and in understanding the physiologic relevance of the pathway. With regard to the latter, we have an ongoing collaboration with Professor Terence Lappin’s group at Belfast City Hospital and Queen’s University examining the molecular basis of idiopathic erythrocytosis, and this has identified critical roles for HIF-2α and the HIF prolyl hydroxylase, PHD2, in the control of erythropoietin in humans. We are also interested in understanding the molecular basis for Tibetan adaptation to the chronic hypoxia of high altitude.

Lab Rotation Projects:
1. Examine mechanisms by which HIF-α is regulated.
2. Determine whether proline hydroxylation plays a more general role in hypoxia.
3. Develop mouse models for examining the HIF pathway.

Lab Personnel:
Frank Lee (Principal investigator)
Daisheng Song (Senior research investigator)
Patrick Arsenault (NIH T32 Postdoctoral fellow)
Marian Bergkamp (Ben Franklin Scholars undergraduate)
Marla Knob (Administrative assistant)

Description of Itmat Expertise

Molecular mechanisms of the hypoxic response.

Selected Publications

Bigham, A.W., & Lee, F.S.: Human high-altitude adaptation: forward genetics meets the HIF pathway (review). Genes & Dev 28: 2189-2204, 2014.

Song, D., Li, L.-S., Arsenault, P.R., Tan, Q., Bigham, A.W., Heaton-Johnson, K.J., Master, S.R., & Lee, F.S. : Defective Tibetan PHD2 Binding to p23 Links High Altitude Adaption to Altered Oxygen Sensing J. Biol. Chem. 289: 14656–14665, 2014.

Arsenault, P.R., Pei, F., Kerestes, H., Percy, M.J., Keith, B., Simon, M.C., Lappin, T.R., Khurana, T.S., and Lee, F.S. : A Knockin Mouse Model of Human PHD2-Gene Associated Erythrocytosis Establishes a Haploinsufficiency Mechanism. J. Biol. Chem. 288: 33571-33584, 2013.

Tan, Q., Kerestes, H., Percy, M.J., Pietrofesa, R., Chen, L., Khurana, T.S., Christofidou-Solomidou, M., Lappin, T.R.J., & Lee, F.S. : Erythrocytosis and pulmonary hypertension in a mouse model of human HIF2A gain-of-function mutation. J. Biol. Chem. 288: 17134–17144, 2013.

Song, D., Li, L.-S., Heaton-Johnson, K.J., Arsenault, P.R., Master, S.R., & Lee, F.S. : Prolyl Hydroxylase Domain Protein 2 (PHD2) Binds a Pro-Xaa-Leu-Glu Motif, Linking it to the Heat Shock Protein 90 Pathway. J. Biol. Chem. 288: 9662-74, 2013.

Lee, F.S., & Percy, M.J.: The HIF Pathway and Erythrocytosis (review). Ann. Rev. Pathology 6: 165-192, 2011.

Furlow, P.W., Percy, M.J., Sutherland, S., Bierl, C., McMullin, M.F., Master, S.R., Lappin, T.R.J, & Lee, F.S. : Erythrocytosis-Associated HIF-2alpha Mutations Identify a Critical Role for Residues C-Terminal to the Hydroxylacceptor Proline. J. Biol. Chem. 284: 9050-8, 2009.

Percy, M.J., Furlow, P.W., Lucas, G.W., Li, X., Lappin, T.R.J., McMullin, M.F., & Lee, F.S. : A gain of function mutation in the HIF2A gene in familial erythrocytosis. N Engl J Med 358: 162-168, 2008.

Percy M.J., Zhao Q., Flores A., Harrison C., Lappin T.R., Maxwell P.H., McMullin M.F.*, & Lee F.S.* *Equal senior coauthors: A family with erythrocytosis establishes a role for prolyl hydroxylase domain protein 2 in oxygen homeostasis. Proc Natl Acad Sci U S A 103: 654-659, 2006.

Yu, F., White, S.B., Zhao, Q., & Lee, F.S.: HIF-1α Binding to VHL is Regulated by Stimulus-Sensitive Proline Hydroxylation. Proc. Natl. Acad. Sci. USA 98: 9630-9635, 2001.

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Last updated: 11/07/2014
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