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East Asian Populations (east + asian_population)
Selected AbstractsEffectiveness and tolerability of paroxetine controlled release (CR) in the treatment of major depressive disorder: an open-label, prospective, multi-center trial in KoreaHUMAN PSYCHOPHARMACOLOGY: CLINICAL AND EXPERIMENTAL, Issue 6 2007Chi-Un Pae Abstract Objectives This study evaluated the effectiveness and tolerability of paroxetine controlled release (CR) for the treatment of Korean patients with major depressive disorder (MDD) in a naturalistic treatment setting. Methods One hundred and ninety patients with MDD were enrolled in this study. The Hamilton Depression Rating Scale-17 item (HAMD-17) and Clinical Global Impression-Severity (CGI-S) scores were measured at the baseline (day 0) and at weeks 1, 2, 4, and 8 (endpoint). The primary measure of effectiveness was a change in the mean HAMD-17 scores from the baseline to the endpoint. The secondary effectiveness measures included a decrease in the HAMD-17 scores of 50% or more at the endpoint compared with the baseline and a change in the mean CGI-S scores from the baseline to the endpoint. Remission was defined as a HAMD-17 score,,,7 at the endpoint. Results The HAMD-17 scores decreased by 56.5% (observed difference, OD,=,,13.3) (t,=,26.63, p,<,0.0001) from the baseline. The CGI-S scores also decreased by 50.0% (OD,=,,2.3) (t,=,24.47, p,<,0.0001). The response and remission rate at the endpoint was 64.2 and 48.4%, respectively. The adverse events were tolerable. No unexpected or serious side effects were observed. Conclusions Despite the methodological limitations, this study demonstrated that paroxetine CR is effective and tolerable for treating patients with MDD in an East Asian population. Copyright © 2007 John Wiley & Sons, Ltd. [source] Brief communication: Patterns of linkage disequilibrium and haplotype diversity at Xq13 in six Native American populationsAMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY, Issue 3 2010Sijia Wang Abstract Comparative studies of linkage disequilibrium (LD) can provide insights into human demographic history. Here, we characterize LD in six Native American populations using seven microsatellite markers in Xq13, a region of the genome extensively studied in populations around the world. Native Americans show relatively low diversity and high LD, in agreement with recent genome-wide survey and a scenario of sequential founder effects accompanying human population dispersal around the globe. LD in Native Americans is similar to that observed in some recently described small population isolates and higher than in large European isolates (e.g., Finns), which have been extensively analyzed in medical genetics studies. Haplotype analyses are consistent with a colonization of the New World by a differentiated East Asian population, followed by extensive genetic drift in the Americas. Am J Phys Anthropol, 2010. © 2009 Wiley-Liss, Inc. [source] Population-Specific Susceptibility to Crohn's Disease and Ulcerative Colitis; Dominant and Recessive Relative Risks in the Japanese PopulationANNALS OF HUMAN GENETICS, Issue 2 2010Shigeki Nakagome Summary Crohn's disease (CD), a type of chronic inflammatory bowel disease (IBD), is commonly found in European and East Asian countries. The calculated heritability of CD appears to be higher than that of ulcerative colitis (UC), another type of IBD. Recent genome-wide association studies (GWAS) have identified more than thirty CD-associated genes/regions in the European population. In the East Asian population, however, a clear association between CD and an associated gene has only been detected with TNFSF15. In order to determine if CD susceptibility differs geographically, nine SNPs from seven of the European CD-associated genomic regions were selected for analysis. The genotype frequencies for these SNPs were compared among the 380 collected Japanese samples, which consisted of 212 IBD cases and 168 controls. We detected a significant association of both CD and UC with only the TNFSF15 gene. Analysis by the modified genotype relative risk test (mGRR) indicated that the risk allele of TNFSF15 is dominant for CD, but is recessive for UC. These results suggest that CD and UC susceptibility differs between the Japanese and European populations. Furthermore, it is also likely that CD and UC share a causative factor which exhibits a different dominant/recessive relative risk in the Japanese population. [source] Multiplex amplified product-length polymorphism analysis of 36 mitochondrial single-nucleotide polymorphisms for haplogrouping of East Asian populationsELECTROPHORESIS, Issue 1 2005Kazuo Umetsu Abstract We present a reliable, rapid, and economical multiplex amplified product-length polymorphism (APLP) method for analyzing the haplogroup-diagnostic mitochondrial single-nucleotide polymorphisms (mtSNPs) in East Asian populations. By examining only 36 haplogroup-specific mtSNPs in the coding region by using four 9-multiplex polymerase chain reaction (PCR) and subsequent electrophoresis, we could safely assign 1815 individuals from 8 populations of Japanese, Korean, Chinese, and Germans to 45 relevant haplogroups. This multiplex APLP analysis of coding-region mtSNPs for haplogrouping is especially useful not only for molecular phylogenetic studies but also for large-scale association studies due to its rapid and economical nature. This is the first panel of mtSNPs in the coding region to be used for haplogrouping of East Asian populations. [source] Dysferlin mutation analysis in a group of Italian patients with limb-girdle muscular dystrophy and Miyoshi myopathyEUROPEAN JOURNAL OF NEUROLOGY, Issue 10 2004K. Kawabe Mutations in the dysferlin gene (DYSF) on chromosome 2p13 cause distinct phenotypes of muscular dystrophy: limb-girdle muscular dystrophy type 2B (LGMD2B), Miyoshi myopathy (MM), and distal anterior compartment myopathy, which are known by the term ,dysferlinopathy'. We performed mutation analyses of DYSF in 14 Italian patients from 10 unrelated families with a deficiency of dysferlin protein below 20% of the value in normal controls by immunoblotting analysis. We identified 11 different mutations, including eight missense and three deletion mutations. Nine of them were novel mutations. We also identified a unique 6-bp insertion polymorphism within the coding region of DYSF in 15% of Italian population, which was not observed in East Asian populations. The correlation between clinical phenotype and the gene mutations was unclear, which suggested the role of additional genetic and epigenetic factors in modifying clinical symptoms. [source] Screening for G71R mutation of the UGT1A1 gene in the Javanese-Indonesian and Malay-Malaysian populationsPEDIATRICS INTERNATIONAL, Issue 5 2004Retno Sutomo AbstractBackground:,There are significant differences in the prevalence and severity of neonatal jaundice among various populations. Recently, it has been reported that a mutation of the UGT1A1 gene, glycine to arginine at codon 71 (G71R), is related to the development of neonatal jaundice in East Asian populations. However, whether the G71R mutation contributes to the high incidence of neonatal jaundice in different Asian populations remains unknown. The authors screened for this mutation in the Javanese-Indonesian and Malay-Malaysian populations. Methods:,One hundred and thirty-six subjects were enrolled in this study: 68 Javanese-Indonesian adults and 68 Malay-Malaysian newborns (32 with jaundice and 36 without jaundice). Denaturing high-performance liquid chromatography (DHPLC) was used to screen for the G71R mutation, and the results were confirmed by nucleotide sequencing analysis. Results:,With DHPLC, the authors easily and clearly detected seven subjects carrying the G71R mutation: two Javanese-Indonesian adults and five Malay-Malaysian newborns. In the 68 Javanese-Indonesian adults, the genotype distribution for G71R mutation was 66 G/G, two G/R and no R/R genotypes, and the mutated allele frequency was 0.015. In the 68 Malay-Malaysian newborns, genotype distribution for the mutation was 63 G/G, five G/R and no R/R genotypes, and the mutated allele frequency was 0.037. The genotype distributions did not differ significantly between the newborns with jaundice and those without jaundice. Conclusion:,The G71R mutation is present, but very rare, in Javanese-Indonesians and Malay-Malaysians. Thus, G71R mutation may not contribute to the high incidence of the neonatal jaundice in South-east Asian populations. DHPLC analysis is a very useful method for detecting the G71R mutation. [source] Polymorphism of the human ABO-Secretor locus (FUT2) in four populations in Asia: indication of distinct Asian subpopulationsANNALS OF HUMAN GENETICS, Issue 5 2001H. PANG The polymorphic alleles of the human ABO-Secretor locus (FUT2 or Se) show high heterogeneity and overt ethnic specificity. To provide additional data for analysis to elucidate the origins of populations, we have investigated the allelic polymorphism of FUT2 in 40 unrelated Tibetan and 53 Tamang individuals from Nepal, 42 Indonesian individuals from Surabaya, and 55 Uygur individuals from Urumqi, using DNA sequencing. In Tibetan, Tamang and Indonesian populations, the frequency of a nonfunctional allele, se357,385, which is found only in Asian populations, was 0·638, 0·509 and 0·631, respectively. In Uygur, the se428, which is common in Caucasian populations, and the se357,385 consisting of two common nonfunctional FUT2 alleles, had frequencies of 0·3 and 0·145, respectively. The fixation index (FST) based on genetic differentiation was obtained pairwise among the four populations in this study and six populations in our previous studies. The results suggested that genetic differentiation among Tibetan, Tamang, Indonesian and East Asian populations is very low, while the distribution feature of the FUT2 alleles in the Uygur population implied an admixture of European with Asian. The distribution of nonfunctional alleles at the FUT2 locus provided further evidence of human migration among the Asian populations. [source] | |||||||||||||