Nelson L. S. Tang

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Gene-gene interactions have long been recognized to be fundamentally important for understanding genetic causes of complex disease traits. At present, identifying gene-gene interactions from genome-wide case-control studies is computationally and methodologically challenging. In this paper, we introduce a simple but powerful method, named "BOolean(More)
MOTIVATION Under the current era of genome-wide association study (GWAS), finding epistatic interactions in the large volume of SNP data is a challenging and unsolved issue. Few of previous studies could handle genome-wide data due to the difficulties in searching the combinatorially explosive search space and statistically evaluating high-order epistatic(More)
PURPOSE We aimed to investigate the methylation pattern in bladder cancer and assess the diagnostic potential of such epigenetic changes in urine. EXPERIMENTAL DESIGN The methylation status of 7 genes (RARbeta, DAPK, E-cadherin, p16, p15, GSTP1, and MGMT) in 98 cases of bladder transitional cell carcinoma and 4 cases of carcinoma in situ was analyzed by(More)
BACKGROUND Despite considerable advances in the past few decades, there is no generally accepted "top theory or theories" of the etiology of adolescent idiopathic scoliosis (AIS). This article aims to provide an overview of the current main hypothetical "concepts" on the etiopathogenesis of AIS. METHODS An extensive literature review on hypothetical(More)
BACKGROUND Multiple acyl-CoA dehydrogenase deficiency (MADD, OMIM 231680) or glutaric aciduria type II (GAII) is an inherited autosomal recessive disease affecting fatty acid, amino acid and choline metabolism, due to mutations in one of three genes namely, electron transfer flavoprotein alpha-subunit, ETFA (OMIM 608053), electron transfer flavoprotein(More)
Inherited mutations in the tumor susceptibility genes BRCA1 and BRCA2 account for about 70%–90% of familial breast cancer in most Caucasian populations while BRCA1 mutations alone contribute to about half of the cases (1– 3). Epidemiologic data from Caucasians show that BRCA1 mutations occur in the general population at a frequency between 0.05% and 0.2%.(More)
Although the exact etiology of adolescent idiopathic scoliosis is still undefined, genetic factors play an important role. Some patients have familial genetic disease that appears to have an autosomal dominant pattern. Linkage studies of these families revealed multiple potential genetic loci that may predispose individuals to the condition. Additional(More)
BACKGROUND Summer predominance of tuberculosis (TB) was reported previously in temperate regions. No consistent data were available for lower latitudes. METHOD The monthly TB notification data in Hong Kong from 1991 to 2002 were examined for seasonal fluctuation. A seasonal model was then developed after standardization by period, sex, age, history of TB,(More)
High frequency loss of 3p21.3 region where RASSF1A located was demonstrated in several tumors. We aimed to investigate the methylation status of RASSF1A and the frequency of LOH in 3p21.3 region in bladder cancer. Three bladder cancer cell lines, 40 cases of bladder TCC and 14 cases of paired voided urine samples were subjected to methylation analysis. By(More)