Email

scheung@bcm.edu

Positions

Professor

Molecular and Human Genetics
Baylor College of Medicine
Houston, TX US

Education

BS from Chinese University Of Hong Kong

01/1966 - Hong Kong, Hong Kong Special Administrative Hong Kong

Biology

PhD from Indiana University

01/1975 - Indianapolis, Indiana United States

Biochemical Genetics

Post-Doctoral Fellowship at Harvard Medical School

01/1977 - Boston, MA United States

Medicine

MBA from Washington University School Of Medicine

01/1994 - St. Louis, MO United States

Certifications

Clinical Cytogenetics

American Board of Medical Genetics

Professional Interests

• Clinical Cytogenetics
• Preimplantation Genetic Screening
• Chromosomal Microarray Analysis (Clinical utility of aCGH)

Professional Statement

The primary focus of my research is to improve and enhance diagnostic precision. A secondary goal is to maximize the possibilities created by the recent gene discoveries using FISH technology (Fluorescent In Situ Hybridization). Diagnostic application of chromosome abnormalities such as prenatal diagnosis of chromosome abnormalities, exclusion of chromosomal mosaicism in amniotic fluid cultures, chromosome mosaicism in Chorionic Villus Sampling, clinical application of FISH technologies, preimplantation genetic diagnosis and recently chromosomal microarray analysis (CMA), all are powerful diagnostic tools that become more vital to the medical community as our diagnostic accuracy improves.

The Medical Genetics Laboratories (MGL) Cytogenetics Laboratory has pioneered the development of FISH testing involving recent gene discoveries through either close collaboration with investigators at Baylor College of Medicine (BCM) or investigators from other institutions, thereby enabling our laboratories the means to better recognize and diagnose genomic abnormalities related to certain chromosome disorders.

We began to offer chromosomal microarray analysis using BAC based comparative genomic hybridization (CGH) in February 2004. The CMA chip includes probes for virtually all known microdeletion/duplication syndromes, pericentromeric and subtelomeric regions, as well probes for some single gene disorders that may occur due to gain or loss of large DNA segments. Probes distributed randomly along all chromosome arms are also included to identify any full trisomies. Therefore, with a single test, CMA will detect almost all of the disorders detected by standard multiple FISH tests and provide a major advance in the diagnosis of patients in which a genetic cause of disability is strongly suspected but not observed by traditional cytogenetic analysis.

Our array coverage has doubled every year in recent years. In June 2009, we launched our 180K array (version 8) allowing the interrogation of not only the entire genome but exon coverage of more than 4000 genes. In the fall of 2010, we launched the 400K array which includes the 180K array with exon coverage and 120K SNP for comprehensive CMA analysis. In the fall of 2011, we will offer Version 9 which interrogates more than 2100 genes with exon coverage plus SNP analysis.

Websites

Selected Publications

• Pham J, Shaw C, Pursley A, Hixson P, Sampath S, Roney E, Gambin T, Kang SH, Bi W, Lalani S, Bacino C, Lupski JR, Stankiewicz P, Patel A, Cheung SW "Somatic Mosaicism Detected by Exon-targeted, High-resolution aCGH in 10,362 Consecutive Cases.." Eur J Hum Genet.. 2014 Jan 8; Pubmed PMID: 24398791
• Han K, Holder JL Jr, Schaaf CP, Lu H, Chen H, Kang H, Tang J, Wu Z, Hao S, Cheung SW, Yu P, Sun H, Breman AM, Patel A, Lu HC, Zoghbi HY "SHANK3 duplication causes a hyperkinetic neuropsychiatric disorder with unique pharmacogenetic properties.." Nature. 2013 7;503(7474):72-7. Pubmed PMID: 24153177
• Campeau PM, Kasperaviciute D, Lu JT, Burrage LC, Kim C, Hori M, Powell BR, ...,Wiszniewska J, Cheung SW, Hennekam RC, Gibbs RA, Lee BH, Sisodiya SM "The genetic basis of DOOR/S syndrome: an exome sequencing study.." Lancet Neurol.. 2014 Jan;13(1):44-58. Pubmed PMID: 24291220
• Wiszniewski W, Hunter JV, Hanchard NA, Willer JR, Shaw C, Tian Q, Illner A, Wang X, Cheung SW, Patel A, ..., Maletic-Savatic M, Rosenfeld JA, Shaffer LG, Davis EE, Belmont JW, Dunstan S, Simmons CP, Bonnen PE, Leal SM, Katsanis N, Lupski JR, Lalani SR. "TM4SF20 ancestral deletion and susceptibility to a pediatric disorder of early language delay and cerebral white matter hyperintensities.." Am J Hum Genet.. 2013 Aug 8;93(2):197-210. Pubmed PMID: 23810381