TNF-α and IL-1RA Polymorphisms and Silicosis Susceptibility in Chinese Workers Exposed to Silica Particles:A Case-Control Study

Abstract Objective To assess the association of TNF-α and IL-1RA SNPs with the risk of silicosis in Chinese workers exposed to silica particles. Methods Case-control study design was used to enroll 68 silicotic patients induced by silica particles and 68 healthy workers matched for length of silica particle exposure as controls. Both cases and controls were from the same company in southwest China, and each of them was requested to complete a questionnaire. Blood samples were drawn for genomic DNA extraction from each participant. The genotyping of TNF-α （-238 and -308） and IL-1RA （＋2018） was performed using polymerase chain reaction-based restriction fragment length polymorphism （PCR-RFLP） and SYBR green-based quantitative polymerase chain reaction {qPCR）, respectively. Unconditional logistic regression model was used to estimate odds ratios （ORs） and their 95% confidential intervals （Cl） for SNPs. Results No significant differences were found between cases and controls in particles exposure length, body mass index （BMI）, and status of smoking and alcohol consumption except for age （P=O.O01） and blood type （P=0.042）. The frequencies of TNF-c（（-238） and IL-1RA （＋2018） genotypes in cases were significantly different from those in controls, （P=O.O01 and P=0.O02, respectively）, while a borderline significant difference was found in the frequencies of TNF-α（-308） between cases and controls （P=0.063）. The variants of three SNPs increased the risk of silicosis in the Chinese workers exposed to silica particles. The adjusted ORs of TNFα（-308）, TNF-α（-238） and IL-1RA （＋2018） were 2.8 （95% Ch 2.1-7.5）, 20.9 （95% Ch 2.8-236.4） and 4.0 （95% CI： 2.6-10.2）, respectively. Conclusion It is suggested that cytokine polymorphisms of TNF-ct （-238, -308） and IL-1RA （＋2018） are associated with the risk of silicosis in the Chinese workers exposed to silica particles. Further independent studies on the interaction between SNPs and exposure to silica particles with a larger sample size are therefore warranted.

Control of Crystal Size and Morphology of Calcium Carbonate Crystal Polymorphism

Calcium carbonate, the main component of lime, has been widely used in industry due to its stability and economy. Calcium carbonate has three types of crystalline polymorphism, calcite, aragonite and vaterite, each with different properties. Therefore, the control of crystal polymorphism is required for industrial applications. In addition, the control of crystal size and shape is similarly required for different applications. In this study, the effect of SrCO3 on the size control of fine aragonite-type calcium carbonate crystals by uniform urea precipitation and the effect of SrCO3 addition was investigated by adding solid strontium carbonate and dissolved strontium carbonate. The addition of solid strontium carbonate affected the crystal polymorphism and size of the calcium carbonate produced, depending on the properties of the solid particles and the amount of SrCO3 added. Experiments on the addition of dissolved SrCO3 showed that the supersaturation formation rate could be controlled to control the crystal polymorphism.

MITOCHONDRIAL DNA POLYMORPHISM IN CONTROL REGION FROM CHINESE YUGU POPULATION

Objective To investigate the mitochondrial DN A sequence polymorphism sites in Chinese YUGU ethnic group and to provide basic da ta used in forensic purpose. Methods Genomic DNA was extracted from the hole blood of 100 unrelated individuals of Chinese YUGU ethnic group by standard chelex-100 method. The sequence polymorphism sites was determined by PCR amplification and direct sequencing. Results 54 polymorphic sites were noted in mtDNA np16091-16418 region, and 46 haplotypes were identifi ed. The genetic diversity was calculated to be 0.9691, and the genetic identity was calculated to be 0.0406. Conclusion There are some particul ar polymorphism sites in Chinese YUGU ethnic group. The results suggest that seq uence polymorphism from np16091-16418 in human mitochondrial DNA can be used as a biological marker for forensic identity.

X-ray repair cross-complementing gene 1 Arg399Gln polymorphism and glioma risk among Asians A meta-analysis based on 2 326 cases and 3 610 controls

OBJECTIVE： Previous reports have demonstrated that X-ray repair cross-complementing gene 1 （XRCCl） Arg399GIn polymorphism is a possible risk factor for several cancers. Published data on the association of XRCCl Arg399GIn polymorphism with glioma susceptibility have generated conflicting results. This study is designed to precisely estimate the relationship. DATA RETRIEVAL： A computer-based online retrieval of Medline, EMBASE, OVID, Sciencedirect, and Chinese National Knowledge Infrastructure was performed to search papers regarding association of XRCC1 Arg399GIn polymorphisms with glioma published up to April 2012. SELECTION CRITERIA： Two investigators selected data independently. Meta analysis was then performed for the selected studies using STATA 11.0 software after strict selection. Heterogeneity test, sensitivity analysis and publication bias assessments were then conducted. MAIN OUTCOME MEASURES： Association of XRCCl Arg399GIn polymorphism with glioma risk. RESULTS： A total of nine case-controlled studies comprising 2 326 cases and 3 610 controls were selected for final analysis. The overall data failed to indicate a significant association of XRCCl Arg399GIn polymorphism with glioma risk （Gin/Gin vs. Arg/Arg： odds ratio （OR） = 1.11; 95% confidence interval （Cl） = 0.94-1.31; dominant model： OR = 1.06; 95%C/= 0.95-1.18; recessive model： OR = 1.04; 95%C/= 0.81-1.34）. However, subgroup analysis regarding ethnicity showed an increased risk among Asians （Gin/Gin vs. Arg/Arg OR = 1.40; 95%C/= 1.10-1.78; recessive model： Caucasians or mixed ethnicities. OR = 1.70; 95%Cl = 1.17-2.46; dominant mode OR = 1.46; 95%C/= 1.04-2.05） but not CONCLUSION： XRCCl Arg399GIn polymorphism might modify the susceptibility to glioma among Asians but not Caucasians. Further large and well-designed studies are needed to confirm this conclusion.

Association between PPARG genetic polymorphisms and ischemic stroke risk in a northern Chinese Han population: a case-control study

Two common polymorphisms of the peroxisome proliferator-activated receptor gamma(PPARG) gene, rs1801282 and rs3856806, may be important candidate gene loci affecting the susceptibility to ischemic stroke. This case-control study sought to identify the relationship between these two single-nucleotide polymorphisms and ischemic stroke risk in a northern Chinese Han population. A total of 910 ischemic stroke participants were recruited from the First Hospital of China Medical University, Shenyang, China as a case group, of whom 895 completed the study. The 883 healthy controls were recruited from the Health Check Center of the First Hospital of China Medical University, Shenyang, China. All participants or family members provided informed consent. The study protocol was approved by the Ethics Committee of the First Hospital of China Medical University, China on February 20, 2012(approval No. 2012-38-1). The protocol was registered with the Chinese Clinical Trial Registry(registration number: ChiCTR-COC-17013559). Plasma genomic DNA was extracted from all participants and analyzed for rs1801282 and rs3856806 single nucleotide polymorphisms using a SNaPshot Multiplex sequencing assay. Odds ratios(ORs) and 95% confidence intervals(CIs) were calculated using unconditional logistic regression to estimate the association between ischemic stroke and a particular genotype. Results demonstrated that the G allele frequency of the PPARG gene rs1801282 locus was significantly higher in the case group than in the control group(P < 0.001). Individuals carrying the G allele had a 1.844 fold increased risk of ischemic stroke(OR = 1.844, 95% CI: 1.286–2.645, P < 0.001). Individuals carrying the rs3856806 T allele had a 1.366 fold increased risk of ischemic stroke(OR = 1.366, 95% CI: 1.077–1.733, P = 0.010). The distribution frequencies of the PPARG gene haplotypes rs1801282-rs3856806 in the control and case groups were determined. The frequency of distribution in the G-T haplotype case group was significantly higher than that in the control group. The risk of ischemic stroke increased to 2.953 times in individuals carrying the G-T haplotype(OR = 2.953, 95% CI: 2.082–4.190, P < 0.001). The rs1801282 G allele and rs3856806 T allele had a multiplicative interaction(OR = 3.404, 95% CI: 1.631–7.102, P < 0.001) and additive interaction(RERI = 41.705, 95% CI: 14.586–68.824, AP = 0.860;95% CI: 0.779–0.940;S = 8.170, 95% CI: 3.772–17.697) on ischemic stroke risk, showing a synergistic effect. Of all ischemic stroke cases, 86% were attributed to the interaction of the G allele of rs1801282 and the T allele of rs3856806. The effect of the PPARG rs1801282 G allele on ischemic stroke risk was enhanced in the presence of the rs3856806 T allele(OR = 8.001 vs. 1.844). The effect of the rs3856806 T allele on ischemic stroke risk was also enhanced in the presence of the rs1801282 G allele(OR = 2.546 vs. 1.366). Our results confirmed that the G allele of the PPARG gene rs1801282 locus and the T allele of the rs3856806 locus may be independent risk factors for ischemic stroke in the Han population of northern China, with a synergistic effect between the two alleles.

Association of interleukin-10 polymorphisms with risk of irritable bowel syndrome:A meta-analysis

AIM:To clarify the current understanding of the association between interleukin-10(IL-10)polymorphisms and the risk of irritable bowel syndrome(IBS).METHODS:We searched for studies in any language recorded in PubMed,Embase and Cochrane library before August 2013.The associations under allele contrast model,codominant model,dominant model,and recessive model were analyzed.The strengths of the association between IL-10 polymorphisms and IBS risk were estimated using odds ratios(OR)with 95%confidence interval(CI).Fixed effects model was used to pool the result if the test of heterogeneity was not significant,otherwise the random-effect model was selected.RESULTS:Eight case-control studies analyzing three single-nucleotide polymorphisms rs1800870(-1082 A/G),rs1800871(-819C/T),and rs1800872(-592A/C)of the IL-10 gene,which involved 928 cases and 1363 controls,were eligible for our analysis.The results showed that rs1800870 polymorphisms were associated with a decreased risk of IBS(GG+GA vs AA:OR=0.80,95%CI:0.66-0.96),(AA+GA vs GG:OR=0.68,95%CI:0.52-0.90).Subgroup analysis revealed such association only existed in Caucasian ethnicity(AA+GA vs GG,OR=0.70,95%CI:0.55-0.89).The rs1800872 polymorphisms were associated with an increased risk of IBS in Asian ethnicity(CC vs GG:OR=1.29,95%CI:1.01-1.16).There were no associations between rs1800871 polymorphisms and the IBS risk.CONCLUSION:The results suggest that IL-10 rs1800870confers susceptibility to the risk of IBS in Caucasian ethnicity,and the rs1800872 may associate with IBS risk in Asians.However,no significant associations are found between rs1800871 and IBS risk.

Association of the Apolipoprotein B Gene Polymorphisms With Essential Hypertension in Northern Chinese Han Population

Objective To study the association of the apolipoprotein B gene polymorphisms with essential hypertension in Northern Chinese Han population. Methods XbaI and EcoRl polymorphisms of the apolipoprotein B （APOB） gene were genotyped by polymerase chain reaction （PCR） and restriction fragment-length polymorphism （RFLP） method in 503 unrelated hypertensive patients and 490 healthy controls recruited from international collaborative study of cardiovascular disease in Asia （InterAsia）. Results The difference in the genotypic distributions could be neglected across the groups. The prevalence of X＋ allele in healthy controls （4.8%） was less frequent in Chinese, and there was no significant difference in the frequency of the X＋ allele between cases （5.7%） and controls （P=0.38）. The observed E- allele frequencies were closely similar among groups （5.9% in cases vs 5.0% in controls, P=0.39）. Logitstic regression analyses revealed that the lack of association still persisted after adjustment of other environmental factors. Haplotype analysis showed that X-E＋ was most frequent and no haplotype could significantly contribute to essential hypertension. Conclusion The APOB gene XbaI and EcoRI polymorphisms are not associated with essential hypertension in the Northern Chinese Han population. Future studies on single nucleotide polymorphisms in larger samples are needed to further investigate the possible contribution of the APOB gene to essential hypertension.

Association of a single nucleotide polymorphism at 6q25.1, rs2046210, with endometrial cancer risk among Chinese women

A recent genome-wide association study identified a new susceptibility locus for breast cancer, rs2046210, which is a single nucleotide polymorphism (SNP) located upstream of the estrogen receptor α (ESR1) gene on chromosome 6q25.1. Given that endometrial cancer shares many risk factors with breast cancer and both are related to estrogen exposure and that rs2046210 is in close proximity to the ESR1 gene, we evaluated the association of SNP rs2046210 with endometrial cancer risk among 953 cases and 947 controls in a population-based, case-control study conducted in Shanghai, China. Logistic regression models were used to derive odds ratios (ORs) and 95% confidence intervals (95% CIs) after adjusting for potential confounders. We found that the A allele of rs2046210, linked to an increased risk of breast cancer, was associated with increased but not statistically significant risk of endometrial cancer (OR = 1.16, 95% CI = 0.96-1.41 for the GA and AA genotypes compared with the GG genotype); the association was stronger among post-menopausal women (OR = 1.28, 95% CI = 1.00-1.65). The association tended to be stronger among women with higher or longer estrogen exposure than among women with relatively lower or shorter exposure to estrogen. Our study suggests that rs2046210 may play a role in the etiology of endometrial cancer. Additional studies are needed to confirm our findings.

Epidermal growth factor receptor rs17337023 polymorphism in hypertensive gestational diabetic women: A pilot study

BACKGROUND Women with gestational diabetes mellitus have an increased risk of developing gestational hypertension,which can increase fetal and neonatal morbidity and mortality.In the past decade,single nucleotide polymorphisms in several genes have been identified as risk factors for development of gestational hypertension.The epidermal growth factor receptor activates tyrosine kinase mediated blood vessels contractility;and inflammatory cascades.Abnormalities in these mechanism are known to contribute towards hypertension.It is thus plausible that polymorphisms in the epidermal growth factor receptor gene would be associated with the development of hypertension in women with gestational diabetes.AIM To determine whether the epidermal growth factor receptor rs17337023 SNP is associated with the occurrence of hypertension in gestational diabetic women.METHODS This pilot case-control study was conducted at two tertiary care hospitals in Karachi,from January 2017-August 2018.Two hundred and two women at 28 week of gestation with gestational diabetes were recruited and classified into normotensive(n=80)and hypertensive(n=122)groups.Their blood samples were genotyped for epidermal growth factor receptor polymorphism rs17337023 using tetra-ARMS polymerase chain reaction.Descriptive analysis was applied on baseline data.Polymorphism data was analyzed for genotype and allele frequency determination using chi-squared statistics.In all cases,a P value of<0.05 was considered significant.RESULTS Subjects were age-matched and thus no difference was observed in relation to age of the study subjects(P>0.05).Body fat percentage was significantly higher in hypertensive females as compared to normotensive subjects(35.138±4.29 Case vs 25.01±8.28 Control;P<0.05).Similarly,systolic and diastolic blood pressures among groups were significantly higher in hypertensive group than the normotensive group(P<0.05).Overall epidermal growth factor receptor rs17337023 polymorphism genotype frequency was similar in both groups,with the heterozygous AT genotype(56 in Case vs 48 in Control;P=0.079)showing predominance in both groups.Furthermore,the odds ratio for A allele was 1.282(P=0.219)and for T allele was 0.780(P=0.221)in this study.CONCLUSION This pilot study indicates that polymorphisms in rs17337023 may not be involved in the pathophysiology of gestational hypertension in gestational diabetes via inflammatory cascade mechanism.Further large-scale studies should explore polymorphism in epidermal growth factor receptor and other genes in this regard.

Associations between thromboxane A synthase 1 gene polymorphisms and the risk of ischemic stroke in a Chinese Han population

Thromboxane A synthase 1 （TBXAS1） catalyses the synthesis of thromboxane A2 （TXA2）, which plays an important role in the pathogenesis of ischemic stroke. Thus, the TBXAS1 gene was investigated as a candidate gene involved in the formation of atherosclerosis. This case-control study collected peripheral blood specimens and clinical data of 370 ischemic stroke patients and 340 healthy controls in the Northern Chinese Han population from October 2010 to May 2011. Two TBXAS1 single-nucleotide polymorphisms, rs2267682 and rs10487667, were analyzed using a SNaPshot Multiplex sequencing assay to explore the relationships between the single-nucleotide polymorphisms in TBXAS1 and ischemic stroke. The TT genotype frequency and T allele frequency of rs2267682 in the patients with ischemic stroke were significantly higher than those in the controls （P 〈 0.01 and P = 0.02）. Furthermore, compared with the GG ＋ GT genotype, the TT rs2267682 genotype was associated with increased risk of ischemic stroke （odds ratio （OR） = 1.80, 95% confidence interval （CI）： 1.16–2.79, P 〈 0.01）. Multivariate logistic analysis with adjustments for confounding factors revealed that rs2267682 was still associated with ischemic stroke （OR = 1.94,95% CI ： 1.13–3.33, P = 0.02）. The frequency of the T-G haplotype in the patients was significantly higher than that in the controls according haplotype analysis （OR = 1.49, 95% CI： 1.10–2.00, P 〈 0.01）. These data reveal that the rs2267682 TBXAS1 polymorphism is associated with ischemic stroke. The TT genotype of TBXAS1 and T allele of rs2267682 increase susceptibility to ischemic stroke in this Northern Chinese Han population. The protocol has been registered with the Chinese Clinical Trial Registry （registration number： ChiCTR-COC-17013559）.

Estrogen receptor gene polymorphism in a Chinese population with multiple sclerosis

This study sought to elucidate the role of the Pvull and Xbal polymorphisms of the estrogen receptor gene in 74 Chinese patients with multiple sclerosis, and 95 ethnicity-matched controls, using polymerase chain reaction-restriction fragment-length polymorphism analysis. The results revealed that the P allele of Pvull was significantly more prevalent in multiple sclerosis patients compared with controls （P = 0.019）. While distribution frequencies were significantly increased in female multiple sclerosis patients compared with female controls （P = 0.044）, no significant difference was observed between male patients and controls （P〉 0.05）. Frequencies of Ppxx genotypes were significantly higher in multiple sclerosis patients compared with controls （24.3% vs 12.8%, P = 0.025）. Genotypes and alleles of the estrogen receptor were not associated with age, number of attacks or expanded disability status scale scores of patients with multiple sclerosis. These findings indicate that the Pvull but not the Xbal polymorphism in the estrogen receptor gene is associated with susceptibility to multiple sclerosis in the Chinese population. In addition, women with P allele appear to be particularly susceptible to multiple sclerosis.

Association between IRS-2 G1057D polymorphism and risk of gastric cancer

AIM: To investigate the relationship between insulin receptor substrate-2 (IRS-2) G1057D polymorphism and the risk of gastric cancer (GC) in a Chinese population. METHODS: A case-control study with 197 GC patients and 156 age- and sex-matched control subjects was conducted. The genotypes of polymorphism were assessed by polymerase chain reaction-restriction fragment length polymorphism. RESULTS: The genotype frequencies of IRS-2 G1057D polymorphism in cases were obviously different from those in the control group (P = 0.031). Compared with GG genotype carriers, the risk for GC was significantly higher (adjusted odds ratio = 2.32, 95% CI: 1.03-5.23, P = 0.042) in the individuals with the IRS-2 DD geno-type. Furthermore, stratified analysis was performed based on age, sex, smoking status and residence, but no significant difference between the two groups was found. In addition, no significant association between genotypes and clinicopathological features was observed either. CONCLUSION: This study demonstrates that IRS-2 G1057D is involved in susceptibility to GC, although further large-sample studies are still needed.

Relationship Between Polymorphism of Cystathionine beta Synthase Gene and Congenital Heart Disease in Chinese Nuclear Families

Objective To study the relationship between polymorphism of cystathionine beta synthase （CBS） gene and development of congenital heart disease （CHD）. Methods One hundred and twenty-seven CHD case-parent triads were recruited from Liaoning Province as patient group, and 129 healthy subjects without family history of birth defect were simultaneously recruited as control group together with their biological parents. For all subjects the polymorphism of CBS gene G919A locus was examined by PCR-ARMS method, Results The frequencies of three genotypes （w/w, w/m, and m/m） in control group were 27.2%, 58,4%, and 14.4%, respectively, with no significant difference in gender. A significant difference in the allele frequency was found between CHD patients and controls, the wild allele frequency was 67,9% in patients and 55.7% in controls CHD parents＇ genotype distribution was significantly different from that in controls. Further comparison of each type of CHD showed that genotype frequencies in several CHD subtypes were significantly different from those in their corresponding controls. The results of TDT analysis showed that no allele transmission disequilibrium existed in CHD nuclear families. Conclusions CBS gene G919A mutation is associated with the development of CHD, and the mutated allele may decrease the risk of CHD.

Glutathione S-transferases M1,T1 genotypes and the risk of gastric cancer:A case-control study

AIM: Glutathione S-transferases (GSTs) are involved in the detoxification of many potential carcinogens and appear to play a critical role in the protection from the effects of carcinogens. The contribution of glutathione S-transferases M1 and T1 genotypes to susceptibility to the risk of gastric cancer and their interaction with cigarette smoking are still unclear. The aim of this study was to determine whether there was any relationship between genetic polymorphisms of GSTT1 and GSTT1 and gastric cancer. METHODS: A population based case-control study was carried out in a high-risk area, Changle County, Fujian Province, China. The epidemiological data were collected by a standard questionnaire and blood samples were obtained from 95 incidence gastric cancer cases and 94 healthy controls. A polymerase chain reaction method was used to detect the presence or absence of the GSTT1 and GSTT1 genes in genomic DNA. Logistic regression model was employed in the data analysis. RESULTS: An increase in risk for gastric cancer was found among carriers of GSTT1 null genotype. The adjusted odds ratio (OR) was 2.63 95% Confidence Interval (95% CI) 1.17-5.88, after controlling for age, gender, cigarette smoking, alcohol drinking, and fish sauce intake. The frequency of GSTT1 null genotype in cancer cases (43.16%) was not significantly different from that in controls (50.00%). However, the risk for gastric cancer in those with GSTT1 null and GSTT1 non-null genotype was significantly higher than in those with both GSTT1 and GSTT1 non-null genotype (OR = 2.77, 95% CI 1.15-6.77). Compared with those subjects who never smoked and had normal GSTT1 genotype, ORs were 1.60 (95% CI:0.62-4.19) for never smokers with GSTT1 null type, 2.33 (95% CI 0.88-6.28) for smokers with normal GSTT1, and 8.06 (95% CI 2.83-23.67) for smokers with GSTT1 null type. CONCLUSIONS: GSTT1 gene polymorphisms may be associated with genetic susceptibility of stomach cancer and may modulate tobacco-related carcinogenesis of gastric cancer.

DCDC2 gene polymorphisms are associated with developmental dyslexia in Chinese Uyghur children

Developmental dyslexia is a complex reading and writing disorder with strong genetic components. In previous genetic studies about dyslexia, a number of candidate genes have been identified. These include DCDC2, which has repeatedly been associated with developmental dyslexia in various European and American populations. However, data regarding this relationship are varied according to population. The Uyghur people of China represent a Eurasian population with an interesting genetic profile. Thus, this group may provide useful information about the association between DCDC2 gene polymorphisms and dyslexia. In the current study, we examined genetic data from 392 Uyghur children aged 8–12 years old from the Xinjiang Uyghur Autonomous Region of China. Participants included 196 children with dyslexia and 196 grade-, age-, and gender-matched controls. DNA was isolated from oral mucosal cell samples and fourteen single nucleotide polymorphisms（rs6456593, rs1419228, rs34647318, rs9467075, rs793862, rs9295619, rs807701, rs807724, rs2274305, rs7765678, rs4599626, rs6922023, rs3765502, and rs1087266） in DCDC2 were screened via the SNPscan method. We compared SNP frequencies in five models（Codominant, Dominant, Recessive, Heterozygote advantage, and Allele） between the two groups by means of the chi-squared test. A single-locus analysis indicated that, with regard to the allele frequency of these polymorphisms, three SNPs（rs807724, rs2274305, and rs4599626） were associated with dyslexia. rs9467075 and rs2274305 displayed significant associations with developmental dyslexia under the dominant model. rs6456593 and rs6922023 were significantly associated with developmental dyslexia under the dominant model and in the heterozygous genotype. Additionally, we discovered that the T-G-C-T of the four-marker haplotype（rs9295619-rs807701-rs807724-rs2274305） and the T-A of the two-marker haplotype（rs3765502-1087266） were significantly different between cases and controls. Thus, we conclude that DCDC2 gene polymorphisms are associated with developmental dyslexia in Chinese Uyghur children.

ASSOCIATION OF pIgR POLYMORPHISMS WITH NASOPHARYNGEAL CARCINOMA

Objective： Epstein-Barr virus （EBV） associated nasopharyngeal carcinoma （NPC） is an important squamous cell cancer endemic in southern China and Southeast Asia. pIgR （polymeric immunoglobulin receptor） gene plays central roles during immune responses and EBV inflammatory and therefore is a good candidate susceptibility gene for NPC. This study is to evaluated potential associations between pIgR gene and NPC susceptibility. Methods： Sequencing was used to identify multiple single nucleotide polymorphisms （SNPs） within the exon regions of pIgR in Guangdong population. Four SNPs were genotyped in 528 NPC patients and 408 normal individuals to perform case-control study. Results： There was no statistical difference in the allele frequencies of each SNP （P〉0.05）. After categorized into 2 groups by age of 45 y, in the group of age below 45 the minor allele T frequency of C888oT was 7%, whereas 4% in controls, with significant difference （P〈0.05）. The Odds Ratio （OR=1.84） also showed higher risk of NPC with individuals carried the minor alleles. Conclusion： The result has proved that SNP C8880T is associated with NPC susceptibility and pIgR gene might play a certain role in oncogenesis and development of NPC.

Relationship between gene polymorphisms and prostate cancer risk

Objective: To investigate the relationship between genetic factor and prostate cancer(Pca) risk and the possible cause in it. Methods: The polymorphisms of cytochrome P450 family 17(CYPl7) rs743572, p27 V109 G and androgen receptor(AR) gene CAG repeat length in peripheral blood from 70 cases and 70 controls were detected through the polymerase chain reaction-restriction fragment length polymorphism technique or short tandem repeatpolymerase chain reaction technique. Then, according to the results of case-control study, the recombinant plasmids containing the wild/mutant p27 gene were constructed and transfected Pca LNcap cells. After 24 and 72 h of transfection, the cell proliferative activity was determined by MTT method, cell cycle distribution and apoptosis was detected by flow cytometry, and the expression level of bcl-2, caspase-3 and p27 protein was determined by Western-blot. Results:In three target polymorphisms, only p27 V109 G polymorphism was related to Pca risk(P=0.030, OR=0.202, 95% CI=0.042-0.973). Pca risk of p27-109 G allele was lower than-109 V allele(P=0.006, OR=0.285, 95% CI=0.110-0.737). Cells transfected with wild/mutant p27 gene both showed the higher cells apoptosis rate and the lower cell proliferative activity than mock cells(P<0.05 or 0.01), the regulatory effect of mutant p27 on cell proliferation and apoptosis was stronger than the wild p27(P<0.05). Conclusions: p27-109 G allele that could cause higher p27 protein expression than-109 V allele in LNcap cells, maybe is the protective factor of Pca.

新疆某三甲医院H型高血压患者血压控制的影响因素分析

目的 调查按照指南规律服用降压药物的H型高血压患者的血压控制状况及其影响因素,以期为H型高血压的防治提供科学依据。方法 回顾性收集新疆医科大学第一附属医院2019年1月至2022年12月收治的符合纳排标准的H型高血压住院患者728例为研究对象。通过查阅病历及电话随访,收集患者入院后的基本信息、实验室信息、合并用药信息、合并疾病信息及随访信息,以患者出院后规律服用降压药1个月及以上的血压情况分为未控制组(276例)和控制组(452例),通过单因素和Logistic回归分析探讨影响血压控制效果的相关因素。结果 单因素分析结果显示,两组的高血压分级、降压药物联用情况、钙通道阻滞剂用药史、精神压力状况、饮食习惯、运动频率比较,差异具有统计学意义(P<0.05)。多因素分析结果显示,高血压三级、MTHFR C677T 基因多态性中TT型、经常感到精神压力大、偏咸的饮食习惯、不运动是影响H型高血压患者血压控制水平的独立危险因素(P<0.05)。结论 影响规律服用降压药物的H型高血压患者血压控制水平的因素包括高血压分级、MTHFR C677T基因型、精神压力状况、饮食习惯及运动频率,可根据相关影响因素采取有效的干预措施,以改善H型高血压患者的血压控制水平。

沉默信息调节因子1在心肌梗死中的研究进展

沉默信息调节因子1(SIRT1)是一种烟酰胺腺嘌呤二核苷酸依赖的组蛋白脱乙酰酶,其可通过抑制氧化应激、炎症、细胞凋亡和纤维化发挥保护作用。大量研究证实,SIRT1与心肌梗死的发生和发展密切相关,SIRT1基因多态性是心肌梗死的易感因素之一。现综述SIRT1基因多态性及表达与心肌梗死的关系,同时总结目前以SIRT1为治疗靶点的研究,旨在为以SIRT1作为靶点的心肌梗死防治策略提供理论依据。

肉碱棕榈酰转移酶1A基因多态性与肝细胞癌风险的相关性研究

目的探讨肉碱棕榈酰转移酶1A(CPT1A)基因多态性与肝细胞癌(HCC)风险的相关性。方法收集2022年3月至2023年3月中国人民解放军空军军医大学第一附属医院收治的HCC患者350例(病例组),选取同期来院体检的健康志愿者350例设为对照组。对两组样本在MassArray平台对rs80356779、rs3019594和rs28461943个单核苷酸多态性(SNP)位点进行基因分型并进行统计分析。结果rs80356779的最小等位基因A与HCC患病风险升高显著相关(P<0.05)。rs80356779和rs3019594位点的基因型频率分布在两组中差异有统计学意义(P<0.05)。rs80356779在显性和加性模型下分别增加了2.17和2.03倍的HCC患病风险(P<0.05),而rs3019594在隐形和加性模型下HCC的患病风险升高1.92和1.36倍(P<0.05)。结论CPT1A基因多态性与HCC患病风险相关,提示rs80356779和rs3019594突变可作为HCC易感人群筛查的潜在位点。