BACKGROUND Cellular senescence is a recognized barrier for progression of chronic liver diseases to hepatocellular carcinoma(HCC). The expression of a cluster of genes is altered in response to environmental factors d...BACKGROUND Cellular senescence is a recognized barrier for progression of chronic liver diseases to hepatocellular carcinoma(HCC). The expression of a cluster of genes is altered in response to environmental factors during senescence. However, it is questionable whether these genes could serve as biomarkers for HCC patients.AIM To develop a signature of senescence-associated genes(SAGs) that predicts patients' overall survival(OS) to improve prognosis prediction of HCC.METHODS SAGs were identified using two senescent cell models. Univariate COX regression analysis was performed to screen the candidate genes significantly associated with OS of HCC in a discovery cohort(GSE14520) for the least absolute shrinkage and selection operator modelling. Prognostic value of this seven-gene signature was evaluated using two independent cohorts retrieved from the GEO(GSE14520) and the Cancer Genome Atlas datasets, respectively.Time-dependent receiver operating characteristic(ROC) curve analysis was conducted to compare the predictive accuracy of the seven-SAG signature and serum α-fetoprotein(AFP).RESULTS A total of 42 SAGs were screened and seven of them, including KIF18 B, CEP55,CIT, MCM7, CDC45, EZH2, and MCM5, were used to construct a prognostic formula. All seven genes were significantly downregulated in senescent cells andupregulated in HCC tissues. Survival analysis indicated that our seven-SAG signature was strongly associated with OS, especially in Asian populations, both in discovery and validation cohorts. Moreover, time-dependent ROC curve analysis suggested the seven-gene signature had a better predictive accuracy than serum AFP in predicting HCC patients' 1-, 3-, and 5-year OS.CONCLUSION We developed a seven-SAG signature, which could predict OS of Asian HCC patients. This risk model provides new clinical evidence for the accurate diagnosis and targeted treatment of HCC.展开更多
AIM： To investigate the frequency and distribution of /V-acetyltransferase 2 （NAT2） and uridine 5＇-diphosphate （UDP）-glucuronosyltransferase 1A7 （UGT1A7） genes in patients with ulcerative colitis （UC） and Cr...AIM： To investigate the frequency and distribution of /V-acetyltransferase 2 （NAT2） and uridine 5＇-diphosphate （UDP）-glucuronosyltransferase 1A7 （UGT1A7） genes in patients with ulcerative colitis （UC） and Crohn＇s disease （CD）. METHODS： Frequencies and distributions of IVAT2 and UGT1A7SNPs as well as their haplotypes were investigated in 95 patients with UC, 60 patients with CD, and 200 gender-matched, unrelated, healthy, control volunteers by PCR-restriction fragment length polymorphism （RFLP）, PCR-denaturing high-performance liquid chromatography （DHPLC）, and direct DNA sequencing. RESULTS： Multiple logistic regression analysis revealed that the frequency of haplotype, NAT2＊7B, significantly increased in CD patients, compared to that in controls （P= 0.0130, OR = 2.802, 95%CI = 1.243-6.316）. However, there was no association between NAT2 haplotypes and UC, or between any UGT1A7haplotypes and inflammatory bowel disease （IBD）. CONCLUSION： It is likely that the NAT2 gene is one ofthe determinants for CD in Japanese. Alternatively, a new CD determinant may exist in the 8p22 region, where NAT2 is located.展开更多
The widespread use of capsule endoscopy and balloonassisted endoscopy has provided easy access for detailed mucosal assessment of the small intestine. However, the diagnosis of rare small bowel diseases, such as crypt...The widespread use of capsule endoscopy and balloonassisted endoscopy has provided easy access for detailed mucosal assessment of the small intestine. However, the diagnosis of rare small bowel diseases, such as cryptogenic multifocal ulcerous stenosing enteritis(CMUSE), remains difficult because clinical and morphological features of these diseases are obscure even for gastroenterologists. In an issue of this journal in 2017, Hwang et al reviewed and summarized clinical and radiographic features of 20 patients with an established diagnosis of CMUSE. Recently, recessive mutations in the PLA2G4A and SLCO2A1 genes have been shown to cause small intestinal diseases. The small bowel ulcers in each disease mimic those in the other and furthermore those found in nonsteroidal anti-inflammatory drug-induced enteropathy. These recent and novel findings suggest that a clinical diagnosis exclusively based on the characteristics of small bowel lesions is possibly imprecise. Genetic analyses seem to be inevitable for the diagnosis of rare small bowel disorders such as CMUSE.展开更多
Totally three articles regarding associations of Nurrl gene mutations, LRRK2 gene polymorphism sites $1647T and R1398H, and polymorphism of PARK2 gene mutations with Han Chinese patients with Parkinson＇s disease were...Totally three articles regarding associations of Nurrl gene mutations, LRRK2 gene polymorphism sites $1647T and R1398H, and polymorphism of PARK2 gene mutations with Han Chinese patients with Parkinson＇s disease were published in Neural Regeneration Research. We hope that our readers find these papers useful to their research.展开更多
目的:探讨S期激酶相关蛋白2(S-phase kinase-interacing protein 2,SKP2)在食管癌组织中的扩增、表达状态及其临床意义。方法:应用荧光原位杂交、RT-PCR、Western印迹和免疫组织化学方法检测SKP2在食管癌组织中的扩增和表达水平,结合临...目的:探讨S期激酶相关蛋白2(S-phase kinase-interacing protein 2,SKP2)在食管癌组织中的扩增、表达状态及其临床意义。方法:应用荧光原位杂交、RT-PCR、Western印迹和免疫组织化学方法检测SKP2在食管癌组织中的扩增和表达水平,结合临床病理资料进行统计学分析。结果:食管癌组织中SKP2的扩增频率为46.0%,SKP2扩增与肿瘤淋巴结转移和临床分期具有显著相关性(P<0.05)。在SKP2扩增的食管癌组织中SKP2 mRNA和蛋白的表达水平均明显升高。免疫组织化学检测结果表明,食管癌组织中SKP2蛋白的过表达与肿瘤淋巴结转移和肿瘤分期有显著相关性(P<0.05),与预后无相关性(P>0.05)。结论:SKP2可能具有癌基因的潜能,在食管癌的发生、发展和淋巴结转移中发挥一定作用。展开更多
基金Supported by the National Natural Science Foundation of China,No.81773128 and No.81871998the Natural Science Basic Research Plan in Shaanxi Province of China,No.2018JM7013 and No.2017JM8039+1 种基金the Research Fund for Young Star of Science and Technology in Shaanxi Province,No.2018KJXX-022China Postdoctoral Science Foundation,No.2018M641000
文摘BACKGROUND Cellular senescence is a recognized barrier for progression of chronic liver diseases to hepatocellular carcinoma(HCC). The expression of a cluster of genes is altered in response to environmental factors during senescence. However, it is questionable whether these genes could serve as biomarkers for HCC patients.AIM To develop a signature of senescence-associated genes(SAGs) that predicts patients' overall survival(OS) to improve prognosis prediction of HCC.METHODS SAGs were identified using two senescent cell models. Univariate COX regression analysis was performed to screen the candidate genes significantly associated with OS of HCC in a discovery cohort(GSE14520) for the least absolute shrinkage and selection operator modelling. Prognostic value of this seven-gene signature was evaluated using two independent cohorts retrieved from the GEO(GSE14520) and the Cancer Genome Atlas datasets, respectively.Time-dependent receiver operating characteristic(ROC) curve analysis was conducted to compare the predictive accuracy of the seven-SAG signature and serum α-fetoprotein(AFP).RESULTS A total of 42 SAGs were screened and seven of them, including KIF18 B, CEP55,CIT, MCM7, CDC45, EZH2, and MCM5, were used to construct a prognostic formula. All seven genes were significantly downregulated in senescent cells andupregulated in HCC tissues. Survival analysis indicated that our seven-SAG signature was strongly associated with OS, especially in Asian populations, both in discovery and validation cohorts. Moreover, time-dependent ROC curve analysis suggested the seven-gene signature had a better predictive accuracy than serum AFP in predicting HCC patients' 1-, 3-, and 5-year OS.CONCLUSION We developed a seven-SAG signature, which could predict OS of Asian HCC patients. This risk model provides new clinical evidence for the accurate diagnosis and targeted treatment of HCC.
文摘AIM： To investigate the frequency and distribution of /V-acetyltransferase 2 （NAT2） and uridine 5＇-diphosphate （UDP）-glucuronosyltransferase 1A7 （UGT1A7） genes in patients with ulcerative colitis （UC） and Crohn＇s disease （CD）. METHODS： Frequencies and distributions of IVAT2 and UGT1A7SNPs as well as their haplotypes were investigated in 95 patients with UC, 60 patients with CD, and 200 gender-matched, unrelated, healthy, control volunteers by PCR-restriction fragment length polymorphism （RFLP）, PCR-denaturing high-performance liquid chromatography （DHPLC）, and direct DNA sequencing. RESULTS： Multiple logistic regression analysis revealed that the frequency of haplotype, NAT2＊7B, significantly increased in CD patients, compared to that in controls （P= 0.0130, OR = 2.802, 95%CI = 1.243-6.316）. However, there was no association between NAT2 haplotypes and UC, or between any UGT1A7haplotypes and inflammatory bowel disease （IBD）. CONCLUSION： It is likely that the NAT2 gene is one ofthe determinants for CD in Japanese. Alternatively, a new CD determinant may exist in the 8p22 region, where NAT2 is located.
基金Supported by the Practical Research Project for Rare/Intractable Diseases from Japan Agency for Medical Research and Development(AMED),No.15ek0109053h0002the Japan Society for the Promotion of Science(JSPS)KAKENHI,No.25460953
文摘The widespread use of capsule endoscopy and balloonassisted endoscopy has provided easy access for detailed mucosal assessment of the small intestine. However, the diagnosis of rare small bowel diseases, such as cryptogenic multifocal ulcerous stenosing enteritis(CMUSE), remains difficult because clinical and morphological features of these diseases are obscure even for gastroenterologists. In an issue of this journal in 2017, Hwang et al reviewed and summarized clinical and radiographic features of 20 patients with an established diagnosis of CMUSE. Recently, recessive mutations in the PLA2G4A and SLCO2A1 genes have been shown to cause small intestinal diseases. The small bowel ulcers in each disease mimic those in the other and furthermore those found in nonsteroidal anti-inflammatory drug-induced enteropathy. These recent and novel findings suggest that a clinical diagnosis exclusively based on the characteristics of small bowel lesions is possibly imprecise. Genetic analyses seem to be inevitable for the diagnosis of rare small bowel disorders such as CMUSE.
文摘Totally three articles regarding associations of Nurrl gene mutations, LRRK2 gene polymorphism sites $1647T and R1398H, and polymorphism of PARK2 gene mutations with Han Chinese patients with Parkinson＇s disease were published in Neural Regeneration Research. We hope that our readers find these papers useful to their research.
文摘目的:探讨S期激酶相关蛋白2(S-phase kinase-interacing protein 2,SKP2)在食管癌组织中的扩增、表达状态及其临床意义。方法:应用荧光原位杂交、RT-PCR、Western印迹和免疫组织化学方法检测SKP2在食管癌组织中的扩增和表达水平,结合临床病理资料进行统计学分析。结果:食管癌组织中SKP2的扩增频率为46.0%,SKP2扩增与肿瘤淋巴结转移和临床分期具有显著相关性(P<0.05)。在SKP2扩增的食管癌组织中SKP2 mRNA和蛋白的表达水平均明显升高。免疫组织化学检测结果表明,食管癌组织中SKP2蛋白的过表达与肿瘤淋巴结转移和肿瘤分期有显著相关性(P<0.05),与预后无相关性(P>0.05)。结论:SKP2可能具有癌基因的潜能,在食管癌的发生、发展和淋巴结转移中发挥一定作用。
