Penn State Pathology and Laboratory Medicine

 
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Faculty Research - Experimental Pathology

Keith C. Cheng, M.D., Ph.D.

Professor and Chief, Division of Experimental Pathology

Professor of Pathology, Biochemistry and Molecular Biology, and Pharmacology

 

Co-Director of the Penn State IBIOS Bioinformatics and Genomics graduate program (with John Carlson)

Director, Zebrafish Functional Genomics and Imaging Core

Keith C. Cheng, M.D., Ph.D.

Office:  Room C7866A

Core Lab:  Room C7804

Telephone:

   Office (717) 531-5635 

   Lab (717) 531-4704

Fax:  (717) 531-5634

Email:  kcheng76@gmail.com

 

Areas of interest:

Cancer genetics, genomic instability, cell differentiation, genetics of human pigmentation, web-based zebrafish atlas, image informatics, SNP database analysis

The Cheng lab is interested in fundamental genetic and molecular mechanisms that cause cancer, basic mechanisms underlying the relationship between human skin pigmentation and cancer, and contributing to web-based infrastructures for science, education, and public service.  Our laboratory pioneered genetic screens in zebrafish to find new genes related to cancer.  Our screens targeted two processes affected in cancer: mutation and cell differentiation.  We are producing an on-line, high-resolution, full-lifespan atlas of the zebrafish that will be integrated with other anatomical web sites of zebrafish, other model organisms, and other disciplines.  Collaboratively, we are developing 2D and 3D image informatics tools for systems biology and medicine, and new methods for X-ray based  high resolution 3D imaging at cellular and subcellular resolutions.  In 2005, we discovered that the putative cation exchanger slc24a5 played a key role in the evolution of light skin in Europeans and modulates vertebrate pigmentation by its effect on melanosome morphogenesis. We are trying to understand why people of East Asian ancestry are not as susceptible to skin cancer as those of European ancestry, by exploring both the molecular mechanisms of melanosome morphogenesis and the genetics underlying the light skin of East Asians/Amerindians.

Answers to the basic question of how and why gene function is lost in somatic tissues will contribute to our understanding of evolution and will help us to understand how and why cancer cells tend to accumulate mutations. Those mutations play a key role in the evolution of killer cancer cells from the originally normal ones of cancer victims, and also the evolution of resistant cancer cells after treatment. The tendency to mutate one's DNA can be called genetic instability or genomic instability, and the phenotype of elevated mutation rate is called mutator phenotype. In order to discover new vertebrate genes that control mutation, we have used the zebrafish (Danio rerio) to generate mutants that show elevated rates of somatic (body cell) mutation.  In this screen, we scored for increased somatic loss of heterozygosity at a marker locus, golden. We expect genetic instability to be caused by deficiencies in any of a number of functions, including chromosome segregation, recombination, and DNA repair.  We are studying the characteristics of mutants, including the ability of the mutations to significantly increase cancer susceptibility, and are engaged in the positional cloning of these mutations.  Insights gained from these studies will increase our understanding of the molecular forces that drive evolution and may suggest new ways to fight cancer.  Since these genomic instability ("gin") mutants tend to develop cancer, they represent an animal model for human genetic syndromes that predispose to cancer, and may promote the detection of environmental mutagens. This novel approach to the study of genetic instability was sponsored originally by the Jake Gittlen Memorial Golf Tournament, American Cancer Society, and the National Science Foundation.

We are also seeking to increase understanding of cellular differentiation by studying mutants defective in cellular differentiation (dif). These mutants are expected to be affected in any of a variety of functions that may affect cell differentiation, cell cycle regulation, or cell communication (Mohideen et al. 2003).   Since these and other experiments require knowledge of the normal gross and microscopic anatomy of the zebrafish, we are now generating a web-based histology and 3D anatomic atlas, currently being executed in collaboration with physicists at University of Chicago and Argonne National Laboratory.  This will be the first full life-span atlas of this type (see zfatlas.psu.edu), which will provide a scaffold for gene expression and morphological morphological phenotypic data generated in our laboratory and globally.  In recognition of important work being done on specific zebrafish organ systems around the world, we welcome contributions to this effort.  We will use scientifically and educationally useful comparisons between stages and organisms.  Our goal is to provide a model system atlas with state-of-the-art quality and the most advanced and useful links to related information.  Individuals will be able to use images from this resource, as long as permissions are requested and approved by email, and appropriate citations made.  Instructions for acknowledgement of the origin of those images will be provided along with permissions.  Support for this project has been provided to date by resources of the Jake Gittlen Cancer Research Foundation, and from the National Center for Research Resources at NIH.  The results of this work will be integrated with the rich bioinformatics of the community zebrafish site, ZFIN (established by Monte Westerfield and colleagues at the University of Oregon).  Plans are underway to expand the project to include comparisons with genetic, reverse genetic, and disease abnormalities, other types of imaging, cross-disciplinary development of new imaging technologies in collaboration with engineers and computer scientists, integration with the web sites of other model systems and disciplines.

We have actively encouraged other laboratories to use the power of zebrafish functional genomics to study the functions of genes in the context of the whole organism, and in development.  We have developed the idea that zebrafish functional genomics is a powerful tool for the dissection of the functions of each of the possible combinations of subunit isoforms of multimeric proteins.  A detailed discussion of this functional genomics approach, being pursued in collaboration with Drs. Robert Levenson (Na/K ATPase; Department of Pharmacology, Penn State College of Medicine) and Janet Robishaw (heterotrimeric G proteins, Weis Center for Research, Danville, PA) has been recently reviewed (See Cheng, Levenson and Robishaw, 2003, below).  We have also participated in Glen Gerhard's pioneering work to define the lifespan of the zebrafish, to set the stage for its use in the study of aging (see publications below with Gerhard, of the Weis Center for Research in Danville).

We are exploring the idea of Systems Morphogenetics, which will yield high-throughput phenotypic profiling as a tool to understand biology and disease.  This work, which is currently focused on creating X-ray based micron-scale computed tomographic 3D imaging tools and analysis for whole-animal phenotyping for the zebrafish phenome project, requires a highly collaborative environment that applies cutting edge technologies from computer science, engineering, materials science, bioinformatics, and genetics to the placing of each of these genes in the spatial, temporal, and physiological context of the whole organism.  We are building of a team of partners from a broad range of disciplines to create a complete digital map of zebrafish anatomy, microanatomy, and gene expression, in order to create a bioinformatics focused on biological function.

 

Current Personnel:   

  • Brian Canada, canada@psu.edu, IBIOS Bioinformatics and Genomics PhD candidate

  • Jean Copper, jec13@psu.edu, Lab Manager; Atlas Coordinator

  • Darin Clark, dpclark6@gmail.com, Post-baccalaureate Research Intern

  • Sans Emmert, Ph.D., sans.emmert@gmail.com, positional cloning of zebrafish genomic instability genes gin10 and gin12.

  • Peggy Hubley, pjh11@psu.edu, Zebrafish Facility Manager

  • Steven Peckins, sep16@psu.edu, Webmaster, Zebrafish Atlas

  • Zurab Tsetskhladze, zut3@psu.edu, Post doc, Molecular, morphogenetic and genetic mechanisms of melanosome morphogenesis

Fish Room Workers:

  • Animal Caretaker C:  Gail Broda
                                   Alyssa Broda

  • Research Support Technician:  Elizabeth Wilson, epw1@psu.edu

Current Collaborators:

  • Victor Canfield, Ph.D., Assistant Professor, Dept Pharmacology; co-PI, melanosome morphogenesis project, Functional Genomics, Bioinformatics, Zebrafish Atlas Project.

  • Francesco DeCarlo, Ph.D., Beamline physicist, Advanced Photon Laboratory, Argonne National Laboratory.  MicroCT imaging of zebrafish.

  • Stephen Ekker, Ph.D., Professor of Biochemistry and Molecular Biology, Mayo Clinic, Rochester, MN. Insertional mutagenesis tools for the finding of genomic instability genes.

  • Patrick La Riviere, Ph.D., Assistant Professor, Department of Radiology, University of Chicago. MicroCT analysis of biological samples in the micron length scale.  (Link his name to: http://www.radiology.uchicago.edu/index.php?q=patrick-la-riviere-phd/patrick-la-riviere-phd)

  • Yanxi Liu, Ph.D.,  Penn State University Department of Computer Science and Engineering,  Application of Symmetry Group Theory to Systems Morphogenetics.

  • Wayne, McLaughlin, Ph.D., wayne.mclaughlin@uwimona.edu.jm. University of West Indies, Mona, Jamaica. Mapping of East Asian pigment genes.

  • Stephen Oppernheimer, M.D., Oxford University. Mapping East Asian skin color genes.

  • James Wang, Ph.D., Penn State University School of Information Sciences and Technology; Image Analysis applications to Systems Morphogenetics.

  • Xianghui Xiao, Ph.D., Beamline physicist, Advanced Photon Laboratory, Argonne National Laboratory.  MicroCT imaging of zebrafish.

Training Opportunities:  Our laboratory pursues independent and collaborative projects utilizing model system approaches to human disease, including Mendelian and population genetics, genomics, molecular and cell biology.  Our interests include high-throughput phenotypic profiling for systems biology, cancer genetics, genetic markers of human migration, the molecular genetics of human pigmentation, the primary genetic determinants of genomic instability and abnormal differentiation in cancer, and development of image recognition tools for model systems and pathology.  We are exploring second generation screens for genomic instability mutants in zebrafish, and building interfaces between model system and human atlases.

Currently, one postdoctoral opportunity is available for an applicant with a strong background in genetics and publications in English-language journals.  Submission of one or more fellowship applications will be required (international, federal, foundation, or local) prior to arrival.  For consideration, applicants should send a statement of life goals, scientific interests, and pdf's of publications.  Applications should be emailed to kcheng76@gmail.com, with copies to Jean Copper (jec13@psu.edu) for coordination.

Graduate candidates should apply through one of the following Penn State programs: MD/PhD program of the College of Medicine, Molecular Medicine option of the Integrative Biosciences Graduate Program in the Life Sciences Consortium, Cell and Molecular Biology, Biochemistry & Molecular Biology, and Intercollege Graduate Degree Program in Genetics.

Links:  ZFIN at Univ. of Oregon

 

Education and Certification:

B.A., Harvard University, 1976

M.D., New York University School of Medicine, 1980

Ph.D., University of Washington and Fred Hutchinson Cancer Research Center, 1986

Residency: Brigham & Women's Hospital, 1980-81; University of Washington, 1981-82, 1986-87

Graduate School:  University of Washington and Fred Hutchinson Cancer Research Center, 1982-86

Postdoc: University of Washington, 1987-1992.

 

For the cover article written for the lay public about genetics, genomics and the work of the Cheng lab, see http://www.rps.psu.edu/0109/model.html. The article is adapted from Keith's concluding talk for the 2001 Penn State Frontiers of Science Lecture Series "Decoding Life's Instruction Book: Genetics and Genomics." The title of his talk, "A Model for Humans," is also an article in Research Penn State, by Teresa Rafacz, September 2001, Volume 22, Issue 3.

 

Publications (selected):

  • Cheng KC, Smith GR. Recombinational hotspot activity of Chi-like sequences. J Mol Biol 180:371-377, 1984.  PMID: 6239928  [View PDF]

  • Cheng KC, Smith GR. Cutting of Chi-like sequences by RecBCD enzyme of Escherichia coli. J Mol Biol 194:747-750, 1987.  PMID: 2958631  [View PDF]

  • Cheng KC, Smith GR. Distribution of Chi-stimulated recombinational exchanges and heteroduplex endpoints in phage lambda. Genetics 123:5-17, 1989.  PMID: 2530132  [View PDF]

  • Cheng KC, Dias M. Genomic Instability and Cancer: Cause and Effect (invited Keystone Meeting review). Cancer Cells 3:188-192, 1991.  PMID: 1679993  [View PDF]

  • Cheng KC, Preston BD, Cahill DS, Dosanjh MK, Singer B, Loeb LA. The vinyl chloride DNA derivative, N2,3-ethenoguanine, causes G to A transitions in E. coli. Proc Natl Acad Sci, USA. 88:9974-9978, 1991.  PMID: 1946466 [View PDF]

  • Cheng KC, Cahill DS, Kasai, Nishimura S, Loeb LA. 8-Hydroxyguanine, an abundant form of oxidative DNA damage, causes G - T and A - C substitutions. J Biol Chem 267:166-172, 1992.  PMID: 1730583  [View PDF]

  • Cheng KC, Loeb LA. Genomic Instability and tumor progression: mechanistic considerations. Advances in Cancer Research 60:121-156, 1993.  PMID: 8417498  [View PDF]

  • Kauffman EJ, Gestl EE, Kim DJ, Walker C, Hite JM, Yan G, Rogan PK, Johnson SL, Cheng KC. Microsatellite-centromere mapping in the zebrafish (Danio rerio). Genomics 30:337-341, 1995.  PMID: 8586435  [View PDF]

  • Ham P, Cheng K.  Construction of zebrafish spawning cages.  The Zebrafish Science Monitor, pp. 5-8, December 18, 1995.  [View PDF]

  • Hite JM, Eckert KE, Kauffman EJ, Cheng KC. Factors affecting fidelity of DNA synthesis during PCR amplification of d(CA)n d(G-T)n microsatellite repeats. Nucleic Acids Res 24:2429-2434, 1996.  PMID: 8710517 [View PDF]

  • Cheng KC, Loeb LA. Genomic stability and instability: A working paradigm. In Current Topics in Microbiology and Immunology, Chapter 2, M.B. Kastan (ed.), Springer-Verlag, Berlin, pp. 5-18, 1997.  PMID: 8979437  [View PDF]

  • Gestl EE, Kauffman EJ, Moore JL, Cheng KC. New conditions for generation of gynogenetic half-tetrad embryos in the zebrafish, Danio rerio.  J Heredity 88:76-79, 1997.  [View PDF]

  • Cheng KC, Moore JL. Genetic dissection of vertebrate processes in zebrafish: A comparison of uniparental and two-generation screens. Biochemistry and Cell Biology 75:525-533, 1997.  PMID: 9551177 [View PDF]

  • Cheng KC. A day well-spent for science:  a first experience with Scientific Congressional Advocacy.  The ASCB Newsletter 21(3), April 1998. http://www.ascb.org/news/vol21no3/brief2.htm 

  • Cheng K. You can't win the Indy 500 in a Yugo:  Help NSF funding:  An op-ed.  In HMS Beagle:  The BioMedNet Magazine, Issue 28, Apr. 17, 1998.

  • Tsao-Wu GS, Weber CH, Budgeon LR, Cheng KC. Agarose embedded tissue arrays for histologic and genetic analysis.  Biotechniques 25:614-618, 1998.  PMID: 9793642  [View PDF]

  • Tsao-Wu GS, Weber CH, Budgeon LR, Cheng KC. Agarose embedded tissue arrays for histologic and genetic analysis.  In Expression Genetics:   High-Throughput Methods, Chapter 4, M. McClelland and A. Pardee (eds.), Eaton Publishing, pp. 31-36, 1999.  [View PDF]

  • Cheng KC, Beckwith L, Wang X. Update to: Agarose embedded tissue arrays for histological and genetic analysis.  In Expression Genetics:   High-Throughput Methods, M. McClelland and A. Pardee (eds.), Eaton Publishing, p. 37, 1999.  [View PDF]

  • Beckwith LG, Moore JL, Tsao-Wu GS, Harshbarger JC, Cheng KC. Ethylnitrosourea induces neoplasms in zebrafish (Danio rerio).  Lab Invest 80:379-385, 2000 (cover article).    PMID: 11956074  [View PDF]

  • Mohideen M-APK, Moore JL, Cheng KC. Centromere-linked microsatellite markers for linkage groups 3, 4, 6, 7, 13 and 20 of zebrafish (Danio rerio).  Genomics 67:102-106, 2000.  PMID: 10945477  [View PDF]

  • Rajarao SJR, Canfield VA, Mohideen M-APK, Postlethwait JH, Cheng KC, Levenson R.  The repertoire of Na,K-ATPase a and b subunit genes expressed in the zebrafish, Danio rerio.  Genome Research 11:1211-1220, 2001.  PMID: 11435403  [View PDF]

  • Moore JL, Aros M, Steudel KG, Cheng KC.  Fixation and decalcification of adult zebrafish for histological, immunocytochemical, and genotypic analysis. Biotechniques 32:296-298, 2002.  PMID: 11848405  [View PDF]

  • Gerhard GS, Kaufmann EJ, Wang X, Stewart R, Moore JL, Kasales CJ, Cheng KC.  Life spans and senescent phenotypes in an outbred and an inbred strain of zebrafish (Danio rerio)Exp. Gerontology 37:1055-1068, 2002.  PMID: 12213556  [View PDF]

  • Gerhard GS, Cheng KC.   A call to fins!  Zebrafish as a gerontological model.  Aging Cell 1:104-111, 2002.  [View PDF]

  • Mohideen M-APK, Beckwith LG, Tsao-Wu GS, Moore JL, Wong ACC, Chinoy MR, Cheng KC.  Histology-based screen for zebrafish mutants with abnormal cell differentiation. Developmental Dynamics 228:414-423, 2003.  PMID: 14579380  [View PDF]

  • Cheng KC, Levenson RL, Robishaw JD. Functional genomic dissection of multimeric protein families in zebrafish.  Developmental Dynamics 228:555-567, 2003.  PMID: 14579392  [View PDF]

  • Moore JL, Gestl EE, Cheng KC.  Mosaic eyes, genomic instability mutants, and cancer susceptibility.  Meth Cell Biol 76:555-568, 2004.  PMID: 15602892

  • Gerhard GS, Malek RL, Keller E, Murtha J, Cheng KC.  Zebrafish, Killifish, neither fish, both fish?  J Gerontol 59:B873-B875, 2004.  PMID: 15472148  [View PDF]

  • Cheng KC.  A life-span atlas for the zebrafish (announcement).  Zebrafish 1:69, 2004. [View PDF]

  • Cheng KC.  Zebrafish experts speak (editorial).  Zebrafish 1:85-103, 2004.  [View PDF]

  • Ostrander GK, Cheng KC, Wolf JC, Wolfe MJ.  Shark cartilage, cancer and the growing threat of pseudoscience. Cancer Res 64:8485-8491, 2004.  PMID: 15574750  [View PDF]

  • Cheng KC.  As I See It: Use science to support global policy.  Harrisburg Patriot-News, December 12, 2004, F1, 6.  [View PDF]

  • Duffy KT, McAleer MF, Davidson WR, Kari L, Kari C, Liu C-G, Farber SA, Cheng KC, Mest JR, Wickstrom E, Dicker AP, Rodeck U.  Coordinate control of cell cycle regulatory genes in zebrafish development tested by cyclin D1 knockdown with morpholino phosporodiamidates and hydroxyprolyl-phosophono peptide nucleic acids.  Nucleic Acids Res 33:4914-4921, 2005.  PMID: 16284195   [View PDF]

  • Croushore JA, Blasiole B, Riddle RC, Thisse C, Thisse B, Canfield VA, Robertson GP, Cheng KC, Levenson R.  ptena and ptenb genes play distinct roles in zebrafish embryogenesis. Developmental Dynamics 234:911-921, 2005.  PMID: 16193492 [  [View PDF]

  • Lamason RL, Mohideen M-AP, Mest JR, Wong AC, Norton HL, Aros MC, Juurynec MJ, Mao X, Humphreville VR, Humbert JE, Sinha S, Moore JL, Jagadeeswaran P, Ning G, Makalowska I, Zhao W, McKeigue PM, O'Donnell D, Kittles R, Parra EJ, Mangini NJ, Grunwald DJ, Shriver MD, Canfield VA, Cheng KC.  SLC24A5 affects pigmentation in zebrafish and man.  Science 310:1782-1786, 2005. (cover article)  PMID: 16357253  [due to the large file size of the supplement and cover, we offer three versions: SciencePaperNoSuppl.pdf (the paper as presented in the journal; 457kb), SciencePaper&Suppl.pdf (the paper in the journal, including the supplementary data; 2857kb), and Science16Dec2005cover.pdf (just the cover, in high resolution, originally submitted with the caption, "Skin color is only gene deep"; 5814kb)].  Science 16 December 2005 "News of the Week".

  • Zinnanti WJ, Lazovic J, Wolpert EB, Antonetti DA, Smith MB, Connor JR, Woontner M, Goodman SI, Cheng KC.  A diet-induced mouse model for glutaric aciduria type I.  Brain 129:899-910, 2006.  PMID: 16446282  [View PDF]

  • Cheng KC.  The golden mutation in zebrafish.  Commentary #1, February 2006 PASPCR web-site posting.  [View PDF]

  • Cheng KC.  Bach's Goldberg Variations: An artistic inspiration for art, science, medicine, and life.  Wild Onions 20:14-15, 2006.  [View PDF]

  • Blasiole B, Canfield VA, Mohideen M-APK, Vollrath MA, Huss D, Dickman JD, Cheng KC, Fekete DM, Levenson, RL.  Separate Na,K-Atpase genes are required for otolith formation and semicircular canal development in zebrafish.  Dev Biol 294:148-160, 2006.  PMID: 16566913  [View PDF]

  • Zinnanti WJ, Lazovic J, Wolpert EB, Antonetti DA, Smith MB, Connor JR, Woontner M, Goodman SI, Cheng KC.  New insights for glutaric aciduria type I.  Brain 129:E55, 2006.  PMID: 16870880  [View PDF]

  • Sabaliauskas NA, Foutz CA, Mest JR, Budgeon LR, Sidor A, Gershenson J, Joshi S, Cheng KC. High-throughput zebrafish histology.  Methods 39:246-254, 2006.  PMID: 16870470  [View PDF]

  • Moore JL, Rush LM, Breneman C, Mohideen M-AP, Cheng, KC.  Zebrafish genomic instability mutants and cancer susceptibility.  Genetics 174:585-600, 2006 (October cover article), 2006. PMID: 16888336  [View PDF]

  • Cheng KC, Canfield VA. The role of SLC24A5 in skin color. Invest Dermatol 16:836-838, 2006.  [View PDF]

  • Canada BA, Cheng KC, Wang JZ.  QCHARM: A Novel Computational and Scientific Visualization Framework for Facilitating Discovery and Improving Diagnostic Reliability in Medicine.  Proceedings of the American Medical Informatics Association Annual Symposium, pp. 870, Washington, D.C., November 2006.  [View PDF]

  • Chi A, Valencia JC, Hu Z-Z, Watabe H, Yamaguchi H, Mangini NM, Huang H, Canfield VA, Cheng KC, Yang OF, Abe R, Yamagishi S, Shabanowitz J, Hearing VJ, Wu C, Appella E, Hunt DF.  Proteomic and bioinformatic characterization of the biogenesis and function of melanosomes.  J Proteome Res 5:3135-3144, 2006.  PMID: 17081065  [View PDF]

  • Norton HL, Kittles RA, Parra E, McKeigue P, Mao X, Cheng KC, Canfield VA, Bradley DG, McEvoy B, Shriver MD.  Genetic evidence for the convergent evolution of light skin in Europeans and East Asians.  Molecular Biol Evol 24:710-722, 2007.  PMID: 17182896  [View PDF]

  • Zinnanti WJ, Lazovic J, Housman C, LaNoue K, O'Callaghan JP, Simpson I, Woontner M, Goodman SI, Connor JR, Jacobs RE, Cheng KC.  Mechanism of age-dependent susceptibility and novel treatment strategy in glutaric acidemia type I.  J Clin Invest 117:3258-3270, 2007.  PMID: 17932566  [View PDF]

  • Canada BA, Thomas GK, Cheng KC*, Wang JZ.*  Automated segmentation and classification of zebrafish histology images for high-throughput phenotyping.  Proceedings of the Third IEEE-NIH Life Science Systems and Applications Workshop, pp. 245-248, Washington, D.C., November 2007.  (*equal contributors)  ISBN number: 978-1-4244-1813-8  [View PDF]

  • Cheng KC.  Demystifying Skin Color and "Race".  In R.E. Hall (ed.):  Racism in the 21st Century, Chapter 1, pp. 3-23, Springer, 2008. [http://books.google.com/books?id=LSCf0j5lNeYC&printsec=frontcover&dq=editions:ISBN0387790977#PPA10,M1]

  • Canada BA, Thomas GK, Cheng KC, Wang JZ, Liu Y.  Towards Efficient Automated Characterization of Irregular Histology Images via Transformation to Frieze-Like Patterns.   Proceedings of the ACM International Conference on Image and Video Retrieval (CIVR 2008), pp. 581-590, Niagara Falls, Canada, July 2008.  [View PDF]

  • Canada BA, Thomas GK, Cheng KC, Wang JZ, Liu Y.  Automatic Lattice Detection in Near-Regular Histology Array Images.  Proceedings of the IEEE International Conference on Image Processing (ICIP), San Diego, California, IEEE, October 2008.  [View PDF]

  • Cheng KC. Skin color in fish and humans: Impacts on science and society.  Zebrafish 5:237-242, 2008.  PMID: 19133821   [View PDF]

  • Ekker SC, Parichy DM, Cheng KC. Research implications of pigment biology in zebrafish.  Zebrafish 5:233-235, 2008.  PMID: 19133820   [View PDF]

  • Spitsbergen JM, Blazer VS, Bowser PR, Cheng KC, Cooper KR, Cooper TK, Frasca S Jr., Groman DB, Harper CM, Law JM, Marty GD, Smolowitz RM, St. Leger J, Wolf DC, Wolf JC.  Finfish and aquatic invertebrate pathology resources for now and the future.  Comparative Biochemistry and Physiology, Part C 149:249–257, 2009.  [For a copy of the paper, please send a request to sef13@psu.edu]

  • Zinnanti WJ, Lazovic J, Griffin K, Skvorak KJ, Paul HS, Homanics GE, Bewley MC, Cheng KC, LaNoue KF, Flanagan JM.  Dual mechanism of brain injury and novel treatment strategy in maple syrup urine disease.  Brain 2009; doi: 10.1093/brain/awp024.   [For a copy of the paper, please send a request to sef13@psu.edu]

  • Cheng KC, Waldstein N.  Unraveling genetic code:  Social, moral questions arise from DNA (Text submitted as, "What does the human genome project mean to me") Review & Opinion section, Harrisburg Patriot-News, Feb 15, 2009.   [View PDF]

  • Cheng KC.  Zebrafish experts speak (editorial).  Zebrafish 5:9-24, 2008.   [View PDF]
     

     

FREQUENTLY ASKED QUESTIONS

What is your goal in life?

Pigmentation Research:

What might your work in human pigmentation contribute to human health?

What do you hope the pigment gene discovery might contribute to society?

What have been the most common public misconceptions about skin color?

Will it be at all possible to change a person’s skin color from white to black or black to white in the near future? Or do you think your discovery can allow people to have a choice in what skin tone they have?

Does the work on SLC24A5 bring us closer to a cure for vitiligo?

I heard that you met with the Race, Ethnicity, and Genetics Working Group at the National Human Genome Research Institute at NIH.  What were your conclusions?

Tell us more about mutation and evolution.

Is there any direct evidence that SLC24A5 is related to intelligence?

Is there anything not talked about with regard to the skin pigmentation work you would like to point out?

When did you become interested in genomic instability?

When did you decide to use zebrafish as a cancer model?

What is your training philosophy?

What is required of graduate students for graduation?

How long will graduate school take?

What is required for success in graduate school?

What is expected of postdoctoral fellows?

How and when did you think of your histology screen?

Explain your interest in Functional Genomics.

When did you become interested in cancer research?

How is it that you came to Penn State?

Who are you willing to hire, when?

I heard you are a musician.  Tell us about it.

What is MUSIC for JAKE, and are you playing again?

Why were you on the Board of Directors of WITF?

What is the Kienle Series?

 

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NEW!!

Skin Color Audiovisuals



 

Dr. Keith Cheng

was the recipient of the
2008 Penn State Faculty Scholar Medal
for Outstanding Achievement
in Life and Health Sciences
on March 24, 2008

 


  Science Paper 16 Dec 2005
  Science Paper and Supplement
  Science Cover Image
  Science News of the Week
  PSU Live Press Release


Penn State Mini-Medical School Genetics Lecture
Presented by Dr. Keith Cheng

 "The Genetic Basis of Skin Color"


SHIRAZ is a collaborative project at Penn State University between the laboratories of James Z. Wang and Keith Cheng.

More about the SHIRAZ Project


 
 
 
"The important thing is
to not stop questioning.
Curiosity has its own 
reason for existing.  
One cannot help but 
be in awe when he 
contemplates the 
mysteries of eternity, 
of life, of the marvelous
structure of reality.  It 
is enough if one tries 
merely to comprehend 
a little of this mystery 
every day.  Never lose 
a holy curiosity."


          - Albert Einstein

 

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