Tim J. Yen, PhD,
Interim Chief Scientific Officer
Professor, Fox Chase Cancer Center
Facility Director, Biological Imaging Facility
Adjunct Associate Professor, University of Pennsylvania
- Postdoctoral Fellow, Molecular Cell Biology, John Hopkins University School of Medicine, Baltimore, MD. 1990
- PhD, Molecular Biology, University of California, Santa Barbara, CA, 1985
- MA, Biochemistry, University of California, Santa Barbara, CA, 1981
- BS, Biochemistry, University of California, Santa Barbara, CA, 1978
Dr. Tim J. Yen's research in fundamental mechanisms of cell division is directly relevant to understanding the biology of cancer, as well as its treatment. Tim's focus over time has been on characterizing the kinetochore: a macromolecular structure assembled onto centromeric chromatin that specifies accurate chromosome segregation. Tim studies the molecular functions of various proteins that reside at kinetochores as it pertains to chromosome segregation and spindle checkpoint signaling. Defects in this process lead to aneuploidy, and is, thus, of fundamental importance to problems, such as birth defects, cancer and other diseases.
Tim is also interested in developing new ways to enhance the efficacy of existing chemotherapies to improve treatment outcomes of cancers. In particular, he is focused on recalcitrant cancers, such as pancreatic, ovarian, brain and melanomas because the treatment outcomes are poor. Efforts to understand how these cancers survive toxic chemo and radiation therapies will reveal new targets for drug development. Tim's work, therefore, uses genome-wide approches, such as RNAi and CRISPR cas9, to perform synthetic lethal screens to identify pathways that facilitate survival of cells to drugs.
Yen TJ, Li G, Schaar BT, Szilak I, Cleveland DW. CENP-E is a putative kinetochore motor that accumulates just before mitosis. Nature. 1992 Oct 8;359(6395):536-9. PubMed PMID: 1406971.
Liao H, Li G, Yen TJ. Mitotic regulation of microtubule cross-linking activity of CENP-E kinetochore protein. Science. 1994 Jul 15;265(5170):394-8. PubMed PMID: 8023161.
Schaar BT, Chan GK, Maddox P, Salmon ED, Yen TJ. CENP-E function at kinetochores is essential for chromosome alignment. J Cell Biol. 1997 Dec 15;139(6):1373-82. PubMed PMID: 9396744; PubMed Central PMCID: PMC2132614.
Chan GK, Schaar BT, Yen TJ. Characterization of the kinetochore binding domain of CENP-E reveals interactions with the kinetochore proteins CENP-F and hBUBR1. J Cell Biol. 1998 Oct 5;143(1):49-63. PubMed PMID: 9763420; PubMed Central PMCID: a.a.
Bhattacharjee V, Zhou Y, Yen TJ. A synthetic lethal screen identifies the Vitamin D receptor as a novel gemcitabine sensitizer in pancreatic cancer cells. Cell Cycle. 2014;13(24):3839-56. PubMed PMID: 25558828.
Sudakin V, Chan GK, Yen TJ. Checkpoint inhibition of the APC/C in HeLa cells is mediated by a complex of BUBR1, BUB3, CDC20, and MAD2. J Cell Biol. 2001 Sep 3;154(5):925-36. PubMed PMID: 11535616; PubMed Central PMCID: PMC2196190.
Tipton AR, Wang K, Link L, Bellizzi JJ, Huang H, et al. BUBR1 and closed MAD2 (C-MAD2) interact directly to assemble a functional mitotic checkpoint complex. J Biol Chem. 2011 Jun 17;286(24):21173-9. PubMed PMID: 21525009; PubMed Central PMCID: PMC3122179.
Eytan E, Wang K, Miniowitz-Shemtov S, Sitry-Shevah D, Kaisari S, et al. Disassembly of mitotic checkpoint complexes by the joint action of the AAA-ATPase TRIP13 and p31(comet). Proc Natl Acad Sci U S A. 2014 Aug 19;111(33):12019-24. PubMed PMID: 25092294; PubMed Central PMCID: PMC4142996.
Wang K, Sturt-Gillespie B, Hittle JC, Macdonald D, Chan GK, et al. Thyroid hormone receptor interacting protein 13 (TRIP13) AAA-ATPase is a novel mitotic checkpoint-silencing protein. J Biol Chem. 2014 Aug 22;289(34):23928-37. PubMed PMID: 25012665; PubMed Central PMCID: PMC4156041.