Henan Population Research Articles

Genetic analysis of isolated methylmalonic acidemia in Henan, China: c.1663G>A variant of MMUT prevalent in the Henan population

BackgroundMethylmalonic acidemia (MMA) is the most common organic acidemia in China, and isolated MMA accounts for approximately 30 % of all types of MMA. Common variants of the MMUT gene vary greatly around the world. The present study aims to determine the high-frequency and novel genetic variants of the MMUT gene in the Henan population of China and evaluate the prognosis of patients carrying the c.1663G>A (p.Ala555Thr) variant. MethodsWe performed next-generation sequencing for 41 patients with isolated MMA screened by tandem mass spectrometry (MS/MS) and analysed the genetic results. We also evaluated the prognosis of patients with the c.1663G>A variant. We used Jalview software for multispecies sequence alignment and Missense3D and DynaMut to predict the protein function of the detected novel variants. ResultsA total of 43 variants from 41 patients with isolated MMA were detected, of which c.1663G>A (14.63 %), c.729_730insTT (10.98 %), and c.1106G>A (8.53 %) are high-frequency variants of the MMUT gene in the Henan population. The patients carrying the c.1663G>A variant tended to be responsive to vitamin B12, have a low mortality rate. We also identified 5 novel variants (c.479C>T, c.811G>C, c.965T>A, c.1142G>A and c.1667C>T). ConclusionThe rare variant c.1663G>A is prevalent in the Henan population, and infants with this variant tend to have good prognosis. Our findings, especially novel variants, will help broaden the spectrum of genetic variants and facilitate clinical diagnosis and genetic counselling for affected families.

Disease Burden and the Accumulation of Multimorbidity of Noncommunicable Diseases in a Rural Population in Henan, China: Cross-sectional Study.

Multimorbidity causes substantial disease and economic burdens on individuals and the health care system. This study aimed to explore the disease burden of multimorbidity and the potential correlations among chronic noncommunicable diseases (NCDs) in a rural population in Henan, China. A cross-sectional analysis was performed using the baseline survey of the Henan Rural Cohort Study. Multimorbidity was defined as the simultaneous occurrence of at least two NCDs in a participant. This study examined the multimorbidity pattern of 6 NCDs, including hypertension, dyslipidemia, type 2 diabetes mellitus, coronary heart disease, stroke, and hyperuricemia. From July 2015 to September 2017, a total of 38,807 participants (aged 18-79 years; 15,354 men and 23,453 women) were included in this study. The overall population prevalence of multimorbidity was 28.1% (10,899/38,807), and the multimorbidity of hypertension and dyslipidemia was the most common (8.1%, 3153/38,807). Aging, higher BMI, and unfavorable lifestyles were significantly associated with a higher risk of multimorbidity (multinomial logistic regression, all P<.05). The analysis of the mean age at diagnosis suggested a cascade of interrelated NCDs and their accumulation over time. Compared with participants without 2 conditional NCDs, participants with 1 conditional NCD would have higher odds of another NCD (1.2-2.5; all P<.05), and those with 2 conditional NCDs would elevate the odds of the third NCD to 1.4-3.5 (binary logistic regression, all P<.05). Our findings indicate a plausible tendency for the coexistence and accumulation of NCDs in a rural population in Henan, China. Early prevention of multimorbidity is essential to reduce the NCD burden in the rural population.

Analysis of gene mutations of medium-chain acyl-coenzyme a dehydrogenase deficiency (MCADD) by next-generation sequencing in Henan, China

BackgroundMedium-chain acyl-coenzyme A dehydrogenase deficiency (MCADD) is a rare inherited metabolic disorder of fatty acid β-oxidation and one of the most common inborn errors of metabolism. The incidence of MCADD varies among regions and ethnic groups. To date, few cases of MCADD have been documented in China. ObjectiveThe present study aimed to find out the novel genetic pathogenic variants in the Chinese patients and evaluate the detection rate of the disease of high-frequency ACADM pathogenic variants in different regions of China. Methods6 cases of MCADD were screened by tandem mass spectrometric (MS/MS) among 245 054 newborns. We performed next-generation sequencing on 6 families of infants with MCADD. We used the REVEL method to predict the protein function of the detected missense variants and used SPDBV 4.10 to predict the protein 3D structure model. We identified pathogenic variants of ACADM gene in 6 cases of MCADD, and then assessed these variants through Sanger sequencing and association analysis. ResultsThe incidence of neonatal MCADD was 1/40,842 in Henan province. Among the 6 patients, five cases were compound heterozygous variants, one case was homozygous variants. DNA sequencing revealed 4 known (c.449_452del, c.1085G > A, c.1229 T > C, c.589A > G) and 3 novel mutations (c.849 + 5_849 + 8del, c.427A > G, c.1181C > T) in the ACADM gene. Mutation c.1085G > A (p.G362E) was most frequent among Henan people and shows obvious differences between North and South of China. ConclusionMCADD is relatively rare in China, and c.1085G > A (p.G362E) is a common mutation in Henan population. Our findings, especially novel variants, will help improve the understanding of the genetic background and have facilitated clinical diagnosis and genetic counseling for the affected families.

Time-trend of the incidence and mortality of esophageal cancer from 2010 to 2018 and its statistics in 2018 in Henan, China.

BackgroundIt is great of significance to figure the time-trend of esophageal cancer (EC) and its current status for effective prevention and control, especially in EC high risk areas. As one of world-renowned high-risk areas, the epidemiology of EC in Henan has not been recently updated. Therefore, we aimed to depict the status quo of EC and analyze its time-trend in Henan.MethodsThe EC data were extracted from the Henan Provincial Cancer registry database derived from the population based cancer registry system, which covered 30.51% of the whole population in Henan and were qualified according to national and international guidelines. The incidence and mortality of EC were estimated by area (rural/urban), gender, and age groups. The age-standardized rates (ASRs) were calculated according to the Segi’s population. Joinpoint regression was used to calculate annual percentage change (APC) and average annual percentage change (AAPC) to evaluate the time-trend of EC.ResultsAs estimated, there were 29,913 new EC cases in Henan, 2018. The crude incidence and the age-standardized incidence rate by world standard population (ASIRW) was 27.43/105 and 19.96/105, respectively. The incidence in males and rural was 1.83 and 1.51 times higher than that in females and urban areas, respectively. Meanwhile, it was estimated that 22,688 deaths occurred in 2018. The crude mortality and the age-standardized mortality rate by world standard population (ASMRW) were 20.80/105 and 14.47/105, respectively. Similarly, males and rural areas had higher mortality compared with females and urban areas. The age-specific incidence and mortality of EC showed significant increasing after 60–64 years group. In general, the time-trend of incidence (APC: −8.9, P<0.001) and mortality (APC: −7.6, P<0.001) of EC showed a significant decreasing trend since 2014, and downward trend were also observed in rural areas for incidence (APC: −5.2, P<0.001) and mortality (APC: −3.9, P<0.001) from 2010 to 2018.ConclusionsThe EC incidence and mortality in Henan has exhibited a significant declining trend in past years. Nonetheless, the disease burden remains high, especially in males and rural areas. Therefore, the ongoing prevention and control strategies of EC should be maintained alongside the establishment of more effective strategies.

The mitochondrial DNA control region sequences from the Chinese sui population of southwestern China

Background Sui people are officially recognised people living in southwest China, but there has been a lack of genetic research, especially based on mitochondrial DNA data. Aim To study the sequences and haplogroups of the mitochondrial DNA control region in a typical Sui population, with the aim of helping to promote the establishment of a forensic DNA analysis reference database in East Asia. Subjects and methods We analysed 201 Sui individuals and observed the sequences of the mitochondrial DNA control region. We calculated and explained the haplotype frequencies, haplogroup distribution and pairwise Fst values between the Sui and 47 other populations in the world, in order to explore genetic polymorphisms and population relationships. Results 161 haplotypes were found in the Sui population, with frequencies of 0.0049–0.0199. All samples were assigned to 80 different haplogroups. The haplotype diversity and random matching probability were 0.999938 and 0.024729, respectively. The pairwise Fst values and correlation p-values of 48 populations showed that the Sui population was most closely related to the Miao population in Guizhou and the Han population in Henan, and closer to the Punjab population and Pukhtunkhwa population in Pakistan, and was significantly different from the other 43 groups. Compared with the other 43 groups, it is relatively isolated. Conclusion Our results show that the study of mitochondrial DNA based on the analysis of matrilineal genetic structure of the Sui population can help to promote the establishment of a forensic DNA reference database in East Asia and provide reference for future anthropological research.

English

In this work, Henan is taken as a typical study area to assess the level of gender differences of urbanization willingness in China; Henan population structure is a small representation of the whole country. Using data of Henan migrant workers&#39; citizenization research in 2017, the evaluation index system of Henan migrant workers&#39; urban integration degree was established based on the Maslow&#39;s demand theory. The weight was computed by combining the weight from the analytic hierarchy process and factor analysis, respectively. The urbanization willingness of different genders was calculated by using the evaluation index system. The result shows that there is no difference between the two groups. &nbsp; &nbsp; Key words: Urbanization willingness, gender differences, synthetic evaluation.

Long-term (2006–2015) variations and relations of multiple atmospheric pollutants based on multi-remote sensing data over the North China Plain

In this analysis, the Aqua/MODIS aerosol optical thickness (AOD), Aura/OMI tropospheric NO2 and SO2 column concentration from 2006 to 2015 were used to statistically analyze the spatial distribution characteristics and variation trends of three polluted parameters from three temporal scales of monthly, seasonal and annual average. The results showed that the minimum values of NO2 and SO2 column concentrations both appeared in July and August, and the maximum values appeared in December and January, which was contrary to the variations in AOD. The highly polluted levels were mainly distributed in Shijiazhuang, Xingtai, and Yancheng cities of Hebei Province, and gradually transported to Zhengzhou, Henan Province, north and southwest of Shandong Province, and Tianjin, along the main line of Taiyuan-Linyi, Shanxi Province. AOD and NO2 had significant differences on the seasonal average scale, whereas SO2 had little changes. These pollutants had declined year by year since 2011, in the 10-year period, AOD and SO2 respectively decreased by 17.14% and 10.57%, and only NO2 rose from 8.69 × 1015 molecules/cm2 in 2006 to 9.10 × 1015 molecules/cm2 in 2015 with the increase rate of 4.79%. Integrated with MODIS-released fire products and the Multi-resolution Emission Inventory for China (MEIC), high AOD values in summer were usually accompanied by frequent biomass burning, and heavy heating demand of coal burning led to largest NO2 and SO2 levels in winter. Both inter-annual variations of MEIC NOx and OMI-observed NO2 responded to emission reductions of vehicle exhaustions positively, but vehicle population in Henan and Shandong provinces need to be further controlled. The significant decline of SO2 is mainly attributed to the enforcement of de-sulfurization devices in power plants. Our study found that in the treatment of complex atmospheric pollution, in addition to strict control of common sources of emissions from AOD, NO2 and SO2, it is also necessary to consider their individual characteristics.

Tropical cyclone damages in Mainland China over 2005–2016: losses analysis and implications

This study analyzed the annual variation and provincial distribution of the number of landfalling tropical cyclones (TCs) and the associated losses in respect of direct economic losses, collapsed buildings, casualties, evacuated population, affected population, and the affected agricultural area in mainland China during 2005–2016. The numbers of western North Pacific TCs and landfall TCs were 24 and 7.5, respectively. The annual mean losses of TC disasters included 36.7 million affected people, 69.5 billion Yuan direct economic losses, and 254 deaths. For an average landfalling TC, the numbers were 4.9 million people, 9.3 billion Yuan, and 33.9 deaths, respectively. Most of the damages were caused by the small numbers of destructive TCs, and the top 10 TCs contributed to 48% of direct economic losses, 71% of deaths, and 66% of building damages. Among the provinces affected by TC disasters, Zhejiang, Guangdong, and Fujian took the majority of the losses. Nevertheless, the casualties per landfalling TC were highest in Hunan (63.3 deaths), while mortalities (the rate of casualties to the evacuated population) in Henan (200.0 per 105 persons) and Yunnan (116.7 per 105 persons) were significantly higher than the other provinces (below 30 per 105 persons), indicating more population needed to be evacuated in future TC disasters in these provinces. The larger the number of landfalling TCs in a year or higher the wind force scale of a landfalling TC did not necessary lead to larger losses. However, stronger rainfall and/or a northeast-recurving track played a role in increasing the TC disaster losses.

Pectate lyase is a factor in the adaptability for Heterodera glycines infecting tobacco

The soybean cyst nematode, Heterodeara glycines, is a serious pathogen of soybean, and reported to be the host of a wide range of Fabaceae. In the present study, the host specificity and reproductivity of two populations of H. glycines collected from soybean and tobacco were identified and characterized. The comparative identity between β-1,4-endoglucanase, pectate lyase and chorismate mutase of H. glycines parasitizing on soybean and tobacco were 99, 97 and 98%, respectively. The qRT-PCR analysis indicated that the expression of pectate lyase 2 gene was significantly higher in second-stage juveniles of H. glycines Henan population parasitizing on tobacco than that of H. glycines Shanxi population parasitizing on soybean. In addition, the pectic acid content of cell wall was significantly higher (45%) in the roots of tobacco than the roots of soybean. Our results indicate that the changes in transcript parasitism genes may be a result of long-term evolution illustrating how a plant-parasitic nematode adapts to the host environment for optimal infestation and survival.

The reference intervals for CA125, CA15-3, CA19-9, CA72-4, AFP, CEA, NSE and CYFRA21-1

Tumor markers are noninvasive diagnostic tools for cancer. Their abnormal expression often occurs earlier than clinical symptoms or other detection signals. Appropriate reference intervals (RIs) of tumor markers are important for health evaluation, cancer diagnosis, therapy monitoring and prognosis assessment. In this study, we aimed to establish the RIs of cancer antigen 125 (CA125), CA15-3, CA19-9, CA72-4, alpha fetoprotein (AFP), carcino-embryonic antigen (CEA), neuron-specific enolase (NSE) and cytokeratin 19 fragment antigen 21–1 (CYFRA21-1) in apparently healthy Henan population. A total of 1705 apparently healthy participants (21–89 years) were recruited from five representative geographical regions in Henan province. Nonparametric 95th percentile intervals were used to define the RIs of CA125, CA15-3, CA19-9, CA72-4, AFP, CEA, NSE and CYFRA21-1. The test results of CA125, CA15-3, CA19-9, CA72-4, AFP, CEA, NSE and CYFRA21-1 can traceable to reference measurement procedures. The age- and gender-specific RIs of the tumor markers were established. We established age- and gender-specific RIs for CA125, CA15-3, CA19-9, CA72-4, AFP, CEA, NSE and CYFRA21-1. The newly established RIs should be more suitable for Henan population. It will be valuable for clinicians to make a medical diagnosis, therapeutic management decision and other physiological assessment.

The Correlation Analysis of Henan Population Distribution Evolution and Terrain Characteristics

Aiming at the relationship between population distribution evolution and terrain characteristics, based on 30m × 30m DEM and 1km2×1km2 population density raster data, and using spatial analysis methods, this paper studies the evolution characteristics of the population spatial distribution, the population vertical distribution and the population slope distribution in Henan province from 1995 to 2015. The results show that, there are significant imbalances in the population development in the province, the population aggregation in urban built-up area is very obvious. The gradually decreasing regions with the density of 500-1000 person/km2 are still the main density distribution characteristics of the province's population. With the rapid increase of population, many people are migrating out from complex terrain. With rapid urbanization, major cities in the province have attracted a large number of immigrants. Excluding the natural population growth factors, the relative growth rate of population is inversely proportional to elevation and slope, there are a lot of people above 6°slope migrating out.

CASC15 gene polymorphisms reduce neuroblastoma risk in Chinese children.

In this case-control study, we analyzed the association between three single nucleotide polymorphisms (SNPs) in the CASC15 gene (rs6939340 A>G, rs4712653 T>C, and rs9295536 C>A) and neuroblastoma susceptibility in the Guangdong and Henan populations of China. We genotyped and analyzed 118 cases and 281 control subjects from Henan province and combined them with previously published data from the Guangdong population. In the Henan population, only the rs6939340 G>A variant homozygote AA was associated with decreased neuroblastoma risk [AA vs. GG: adjusted odds ratio (OR) = 0.47, 95% confidence interval (CI) = 0.23-0.98; P=0.045]. All three polymorphisms, individually and in combination, were associated with decreased neuroblastoma susceptibility in the Guangdong population. Moreover, subjects carrying 1-3 of these protective genotypes had lower neuroblastoma susceptibility than non-carriers (adjusted OR=0.65, 95% CI=0.51-0.84, P=0.0007). These results show that all three genetic variants of CASC15 identified in a genome-wide association study (GWAS) decrease neuroblastoma risk in two distinct Chinese populations.

The prevalence of hepatitis B infection in central China: An adult population-based serological survey of a large sample size.

The objective of this study was to determine the prevalence of serum HBsAg among adults in Henan province, China. A provincial serosurvey of people aged 18-74 years was conducted and individuals for analysis were selected using a multistage stratified random cluster sampling method. A 5-ml serum sample from each person was collected and the serum was tested for the presence of HBsAg, HBcAb, HBsAb, HBeAg, and HBeAb by ELISA. Multivariate analysis was used to identify factors associated with the prevalence of HBsAg. A total of 16,685 residents, aged 18-74 years who resided in 60 communities or villages in Henan, China were surveyed. Among the eligible study population, 642 HBsAg positive cases (3.7%) were found. The prevalence increased steadily from 3.1% among population aged 18-35 years old, to 5.1% among population aged 55-74 years. Accordingly, HBsAb declined steadily from 53.4% to 24.7%. Six hundred and forty-two positive HBsAg blood samples were screened for the HBeAg and HBeAb. HBeAg prevalence declined steadily from 27.7% among population age 18-35 years old to 6.8% among population age 55-74 years old. The single factor analysis was used for 16 possible risk factors and multivariate analysis showed that five risk factors were significantly related to HBV infection. HBV infection is a serious public health problem among adult population in Henan. Strengthening administrative regulations of medical practices, especially in rural areas, and providing health education propaganda to the public of HBV infection should be given more attention on public health policy. J. Med. Virol. 89:450-457, 2017. © 2016 Wiley Periodicals, Inc.

Associations between TOX3 rs3803662 polymorphisms and immunological markers of breast cancer

TOX3 gene was considered to be breast cancer susceptibility gene in the European population and East Asian populations. This study was aimed to investigate the relevance of TOX3 gene rs3803662 single nucleotide polymorphisms and sporadic breast cancer susceptibility among the Han Nationality in Henan Province. A case-control study was performed among 253 patients with sporadic breast cancer and 343 control subjects in Henan Province. The SNP rs3803662 in TOX3 was genotyped by imLDR technique. Association analysis based on unconditional logistic regression was carried out to determine the odds ratio (OR) and 95% confidence interval (95% CI) for the SNP between different alleles and breast cancer. There was no statistically significant difference in the distribution of TOX3 rs3803662 allele in different Ki-67 value and HER2 gene status in the case group. The distribution of TOX3 rs3803662 allele between breast cancer and the control group were different. Compared with allele AA and GA, allele GG increased the risk of breast cancer in codominant inheritance (OR=2.19, 95% CI:1.19-4.02) and recessive genetic models (OR=2.06, 95% CI: 1.15-3.70). Further stratifying analysis was conducted based on estrogen receptor status. The SNP rs3803662 showed significant associations with ER status, and was associated with positive ER status in the recessive (OR=1.92; 95% CI:1.00-3.67; P=0.05) and codominant models (OR=2.07; 95% CI:1.05--.08; P=0.036). And this SNP was associated with negative ER status breast cancers in both recessive (OR=2.38; 95% CI:1.10-5.15; P=0.028) and codominant models (OR=2.43; 95% CI:1.08-5.48; P=0.032). But there was no statistically significant difference in each subgroup stratified by ER status. This was a verification study in a Han population. In codominant and recessive genetic models, allele GG increased breast cancer risk and was associated with the pathogenesis of different ER status breast cancer. But there was no obvious correlation between this SNP and Ki-67 or HER2 gene. This is the first breast cancer susceptibility loci that is confirmed in Henan population. Our study only analyzes the correlation between the SNP and ER status in breast cancer. More studies and analyses about the association between SNPs and different characteristic of breast cancer should be performed.

Population data of mitochondrial DNA HVS-I and HVS-II sequences for 208 Henan Han Chinese.

The two hypervariable segments (HVS-I and HVS-II) of mitochondrial DNA (mtDNA) control region were sequenced for a population of 208 unrelated healthy individuals sampled from Suiping County, Henan Province, China. A total of 192 different haplotypes were identified, of which 179 haplotypes were unique (93.23%). The variation of the mtDNA HVS-I and HVS-II was confined to 166 nucleotide positions, of which 115 were observed in the HVS-I and 51 in the HVS-II. The haplotype diversity and random match probability were 0.9991 and 0.0061, respectively. Following the principle of the updated East Asian mtDNA phylogeny tree, individual samples were assigned to the specific haplogroups based on the information both from control region and coding-region obtained. Haplogroup D was the most common haplogroup (25.96%). The northern China-prevalent haplogroups (A, C, D, G, M8, Y, and Z) and the southern China-prevalent haplogroups (B, F, M7, N9, and R9) accounted for 48.56% and 46.63%, respectively, of the Henan Han mtDNA gene pool. The mtDNA hypervariable region was highly polymorphic in Henan Han population. These sequences could serve as mtDNA reference data for forensic casework in Henan population as well as for population genetic study.

Association of the rs11196218 polymorphism in TCF7L2 with type 2 diabetes mellitus in Asian population

ObjectiveTo clarify the association of rs11196218 polymorphism in transcription factor 7-like 2 (TCF7L2) and type 2 diabetes mellitus (T2DM) in Asian population by a case–control study and meta-analysis. MethodsIn the case–control study, 1842 patients with T2DM and 7777 normal glucose-tolerant controls in the Henan province of China were genotyped for rs11196218 in TCF7L2 by PCR–ligase detection reaction. We used allele, co-dominant, dominant and recessive models to evaluate the risk association and performed a meta-analysis of the results of different genetic models in previous studies and the current study. ResultsThe AG genotype of rs11196218 was associated with risk of T2DM in the Henan population (odds ratio 1.37, 95% confidence interval 1.06–1.78), and dominant model showed marginal significant association (1.28, 0.99–1.67). Meta-analysis of 10 studies revealed the dominant model associated with T2DM in the overall population (1.20, 1.05–1.36). When stratified by region (southern and northern China and Japan), both the AG genotype and the dominant model were associated with risk of T2DM in southern Chinese (1.31, 1.03–1.66; 1.27, 1.01–1.60, respectively). ConclusionThe rs11196218 polymorphism in TCF7L2 is associated with risk of T2DM in Asian population.

Genetic polymorphisms of 20 short tandem repeat loci from the Han population in Henan, China

The aim of this study was to investigate the genetic polymorphism of 20 short tandem repeat (STR) loci including D1S1656, D2S1338, D3S1358, D5S818, D6S1043, D7S820, D8S1179, D12S391, D13S317, D16S539, D18S51, D19S433, D21S11, CSF1PO, FGA, Penta D, Penta E, TH01, TPOX, and vWA in Han population of Henan, China and to assess its value in forensic science. Genomic DNA was extracted from 274 blood samples of unrelated healthy individuals in the Henan Han population. Alleles were amplified with PowerPlex® 21 system kit and PCR products were detected with ABI3130 genetic analyzer (Applied Biosystems) and the data were analyzed with modified PowerStats v1.2. A total of 229 alleles were observed in this Han population and the allelic frequencies ranged from 0.0020 to 0.5090 in the present study. Observed genotype distributions for each locus do not show deviations from Hardy–Weinberg equilibrium expectations (p &lt; 0.05). The combined power of discrimination, combined power of exclusion, and combined matching probability of this 20 STR loci were 0.999999999, 0.999999994603, and 4.0433 × 10−24, respectively. The 20 STR loci are highly polymorphic in the Han population of Henan, China and they may be of great value in forensic science and human population genetics.

Molecular characterization and population genetics of non-CODIS microsatellites used for forensic applications in Brazilian populations

Several microsatellites PCR (polymerase chain reaction) multiplex systems (i.e. for simultaneous typing) have been reported for forensic analysis. These include autosomal STR multiplex kits widely used which are commercially available. These commercial kits are generally based on the Combined DNA Index System (CODIS) loci, and a huge volume of genetic population data for the CODIS loci from different ethnic groups has been reported [ 1 Chouery E. Coble M.D. Strouss K.M. Saunier J.L. Jalkh N. Medlej-Hashim M. Ayoub F. Mégarbané A. Population genetic data for 17 STR markers from Lebanon. Leg. Med. 2010; 12: 324-326 Abstract Full Text Full Text PDF PubMed Scopus (13) Google Scholar , 2 Xu L.N. Hu S.P. Feng G.Y. STR polymorphisms of the Henan population and investigation of central plains Han origin of Chaoshanese. Biochem. Genet. 2009; 47: 569-581 Crossref PubMed Scopus (8) Google Scholar , 3 Grattapaglia D. Schmidt A.B. Costa e Silva C. Stringher C. Fernandes A.P. Pereira M.E. Brazilian population database for the 13 STR loci of the AmpfISTR® Profile Plus™ and Cofiler™ multiplex kits. Forensic Sci. Int. 2001; 118: 91-94 Abstract Full Text Full Text PDF PubMed Scopus (26) Google Scholar , 4 Egyed B. Füredi S. Angyal M. Balogh I. Kalmar L. Padar Z. Analysis of the population heterogeneity in Hungary using fifteen forensically informative STR markers. Forensic Sci. Int. 2006; 158: 244-249 Abstract Full Text Full Text PDF PubMed Scopus (21) Google Scholar ]. Nevertheless, there are hundreds of other highly polymorphic STR loci unlinked to the current CODIS loci (non-CODIS markers), which are also useful for forensic genetics [ [5] Asamura H. Ota M. Fukushima H. Population data on 10 non-CODIS STR loci in Japanese population using a newly developed multiplex PCR system. J. Forensic Leg. Med. 2008; 15: 519-523 Abstract Full Text Full Text PDF PubMed Scopus (11) Google Scholar ]. Analysis of further non-CODIS STR loci may complement information from CODIS loci, offering powerful tools for difficult kinship testing, such as sib-ship testing or testing for deficient paternity cases [ [6] Asamura H. Fujimori S. Ota M. Fukushima H. MiniSTR multiplex systems based on non-CODIS loci for analysis of degraded DNA samples. Forensic Sci. Int. 2007; 173: 7-15 Abstract Full Text Full Text PDF PubMed Scopus (26) Google Scholar ].

Analysis of cancer incidence and mortality in Henan province, 2009

To analyze the cancer incidence and mortality of Henan province in 2009. On basis of the criteria of data quality from the National Central Cancer Registry (NCCR), data from 6 registries in Henan province were evaluated, covering 6 061 564 people, accounting for 6.45% of the total population in Henan in 2009. There were 3 104 991 people of males, and 2 956 573 people of females. The incidence, mortality, 10 most common cancers, constitution and cumulative rate (0-74 years old) were then calculated. The age-standardized rate was calculated and adjusted by the Chinese standard population in 1982 as well as the Segi's world standard population. There were 12 091 new diagnosed cancer and 8040 death cases registered in Henan province in 2009. The rate of pathological diagnosis was 68.2% (8246/12 901) and only 1.75% (2116/12 901) had death certificates. The ratio of mortality and incidence was 0.66 (8040/12 091). The incidence rate was 199.47/100 000 (12 091/6 061 564) in total, and it was 216.36/100 000(6718/3 104 991) in males and 181.73/100 000(5373/2 956 573) among females. The standardized incidence by Chinese population was 126.50/100 000 and it was 166.08/100 000 by world's population. The cumulative rate was 19.95% between 0 and 74 years old. The incidence was the highest in Linzhou city, whose standardized incidence was 156.87/100 000 by Chinese population and the incidence was the lowest in Shenqiu city, whose standardized incidence was 104.82/100 000 by Chinese population. The morphology verified cases accounted for 68.2% (8246/12 091), death certification cases only accounted for 1.75% (2116/12 091), and mortality to incidence ratio was 0.66 (8040/12 091). The crude incidence in cancer registration areas of Henan province was 199.47/10 000 (12 091/6 061 564), 216.36/10 000(6718/3 104 991) for males, 181.73/10 000 (5373/2 956 573) for females, age-standardized incidence rates by Chinese standard population and by world standard population were 126.50/10 000 and 166.08/10 000 with cumulative incidence rate (0-74 age years old) of 19.95%. The crude mortality in cancer registration areas of Henan province was 132.64/100 000 (8040/6 061 564), separately 160.58/100 000 (4986/3 104 991) for males and 103.30/10 000 (3054/2 956 573) for females. The age-standardized mortality rates by Chinese standard population and by world's standard population were 78.41/10 000 and 107.49/10 000. The cumulative mortality rate (0-74 age years old) was 12.18%. The mortality rate was the highest in Linzhou city, whose standardized rate was 93.35/100 000 by Chinese population, and the lowest mortality rate was in Yuzhou city, whose standardized rate was 67.95/100 000. The most common cancers were lung cancer, esophageal cancer, gastric cancer, liver cancer, breast cancer, rectum cancer, brain nervous system cancer, colon cancer, cervical cancer and uterus cancer, all of which accounted for 82.23% (9943/12 091) of the registered cancers.Lung cancer, esophageal cancer, gastric cancer, liver cancer, breast cancer, rectum cancer, brain nervous system cancer, pancreas cancer, colon cancer and gallbladder carcinoma were the major causes for the death, accounting for 86.30% (6938/8040) of all cancer deaths. Both incidence and mortality of cancer in Henan province were lower than the level in China, prevention and control should be implemented based on practical situation.

Variation in Genomic Methylation in Natural Populations of Chinese White Poplar

BackgroundIt is thought that methylcytosine can be inherited through meiosis and mitosis, and that epigenetic variation may be under genetic control or correlation may be caused by neutral drift. However, DNA methylation also varies with tissue, developmental stage, and environmental factors. Eliminating these factors, we analyzed the levels and patterns, diversity and structure of genomic methylcytosine in the xylem of nine natural populations of Chinese white poplar.Principal FindingsOn average, the relative total methylation and non-methylation levels were approximately 26.567% and 42.708% (P<0.001), respectively. Also, the relative CNG methylation level was higher than the relative CG methylation level. The relative methylation/non-methylation levels were significantly different among the nine natural populations. Epigenetic diversity ranged from 0.811 (Gansu) to 1.211 (Shaanxi), and the coefficients of epigenetic differentiation (GST = 0.159) were assessed by Shannon’s diversity index. Co-inertia analysis indicated that methylation-sensitive polymorphism (MSP) and genomic methylation pattern (CG-CNG) profiles gave similar distributions. Using a between-group eigen analysis, we found that the Hebei and Shanxi populations were independent of each other, but the Henan population intersected with the other populations, to some degree.ConclusionsGenome methylation in Populus tomentosa presented tissue-specific characteristics and the relative 5′-CCGG methylation level was higher in xylem than in leaves. Meanwhile, the genome methylation in the xylem shows great epigenetic variation and could be fixed and inherited though mitosis. Compared to genetic structure, data suggest that epigenetic and genetic variation do not completely match.