Objective:The incidence and mortality of colorectal carcinoma(CRC)continue to rise globally,highlighting the need to identify modifiable risk factors for early detection and prevention.Previous studies have demonstrat...Objective:The incidence and mortality of colorectal carcinoma(CRC)continue to rise globally,highlighting the need to identify modifiable risk factors for early detection and prevention.Previous studies have demonstrated significant associations between CRC risk and various serum metabolites as well as inflammatory cytokines;however,due to limitations in study design and potential confounding factors,the causal relationships remain unclear.This study aims to investigate the causal relationships between inflammatory cytokines,serum metabolites,and CRC risk,providing a theoretical basis for the development of novel early diagnostic biomarkers and therapeutic targets.Methods:A two-sample Mendelian randomization(MR)design was applied using summary statistics from genome-wide association studies(GWAS).Instrumental variables(IVs)were derived from:1)metabolomics GWAS data of 1400 serum metabolites(n=8299);2)cytokine GWAS data of 91 inflammatory factors(n=14824);and 3)CRC risk data from the FinnGen consortium(6847 cases and 314193 controls).The primary analysis was conducted using the inverse-variance weighted(IVW)method,with sensitivity analyses performed using MR Egger regression and the weighted median method.Effect estimates including odds ratios(OR),95%confidence intervals(CI),and false discovery rates(FDR)were calculated.Results:MR analysis indicated that higher levels of axin-1(AXIN1)(OR=0.84195%CI 0.714 to 0.991)and Fms-related tyrosine kinase 3 ligand(Flt3L)(OR=0.916,95%CI 0.844 to 0.994)were associated with a reduced risk of CRC.In contrast,higher levels of Delta/Notchlike epidermal growth factor-related receptor(DNER)(OR=1.119,95%CI 1.009 to 1.241)and vascular endothelial growth factor A(VEGF-A)(OR=1.078,95%CI 1.011 to 1.150)were associated with an increased risk of CRC(all P<0.05).Metabolomics association analysis further identified 144 serum metabolites significantly correlated with these four key inflammatory cytokines(FDR<0.05),suggesting that they may regulate CRC risk through inflammatory pathways.Conclusion:Specific inflammatory cytokines and serum metabolites have causal relationships with the risk of CRC.These findings provide insights for further exploration of potential risk factors and the development of effective prevention strategies for CRC.展开更多
为探究布鲁菌感染宿主细胞早期泛素化修饰蛋白质组表达变化并筛选出影响免疫应答的关键调控蛋白,通过Label-free和泛素化富集技术以及高分辨率LC-MS/MS联用的定量蛋白质组学研究策略,对布鲁菌16M感染11 h (感染5 h,胞内复制6 h)后的巨...为探究布鲁菌感染宿主细胞早期泛素化修饰蛋白质组表达变化并筛选出影响免疫应答的关键调控蛋白,通过Label-free和泛素化富集技术以及高分辨率LC-MS/MS联用的定量蛋白质组学研究策略,对布鲁菌16M感染11 h (感染5 h,胞内复制6 h)后的巨噬细胞和未感染布鲁菌16M的巨噬细胞进行了泛素化蛋白质组学定量研究,数据库检索分析了16M感染后的巨噬细胞和未感染的巨噬细胞差异表达的泛素化位点对应的蛋白质,并应用生物信息学方法筛选出16M感染巨噬细胞后可造成宿主免疫抑制的关键蛋白质。结果显示,共鉴定出349个蛋白质上580个泛素化位点。布鲁菌16M感染组相对于未感染组167个蛋白质上259个位点泛素化修饰水平发生上调,212个蛋白质上321个位点泛素化修饰水平发生下调(差异倍数>1.5,P<0.05);35个泛素化修饰差异表达的蛋白质可能与布鲁菌感染后宿主的免疫应答有关,其中27个泛素化修饰的下调蛋白质(如Bcap31、Btk、Faf1和Akap31等),1个泛素化修饰上调蛋白质Ubqln1可能是布鲁菌感染宿主后造成免疫抑制的关键蛋白。本研究筛选获得了布鲁菌16M感染宿主细胞免疫相关差异表达的泛素化修饰蛋白质,初步揭示布鲁菌能够调控宿主免疫信号通路、自噬和凋亡等免疫应答过程中相关蛋白质的泛素化修饰,为进一步研究布鲁菌感染后调节宿主泛素化修饰进而形成免疫逃逸的分子机制提供理论基础。展开更多
基金supported by the Natural Science Foundation of Hunan Province (2022JJ30987)the Key Research and Development Project of Hunan Province (2024JK2107),China。
文摘Objective:The incidence and mortality of colorectal carcinoma(CRC)continue to rise globally,highlighting the need to identify modifiable risk factors for early detection and prevention.Previous studies have demonstrated significant associations between CRC risk and various serum metabolites as well as inflammatory cytokines;however,due to limitations in study design and potential confounding factors,the causal relationships remain unclear.This study aims to investigate the causal relationships between inflammatory cytokines,serum metabolites,and CRC risk,providing a theoretical basis for the development of novel early diagnostic biomarkers and therapeutic targets.Methods:A two-sample Mendelian randomization(MR)design was applied using summary statistics from genome-wide association studies(GWAS).Instrumental variables(IVs)were derived from:1)metabolomics GWAS data of 1400 serum metabolites(n=8299);2)cytokine GWAS data of 91 inflammatory factors(n=14824);and 3)CRC risk data from the FinnGen consortium(6847 cases and 314193 controls).The primary analysis was conducted using the inverse-variance weighted(IVW)method,with sensitivity analyses performed using MR Egger regression and the weighted median method.Effect estimates including odds ratios(OR),95%confidence intervals(CI),and false discovery rates(FDR)were calculated.Results:MR analysis indicated that higher levels of axin-1(AXIN1)(OR=0.84195%CI 0.714 to 0.991)and Fms-related tyrosine kinase 3 ligand(Flt3L)(OR=0.916,95%CI 0.844 to 0.994)were associated with a reduced risk of CRC.In contrast,higher levels of Delta/Notchlike epidermal growth factor-related receptor(DNER)(OR=1.119,95%CI 1.009 to 1.241)and vascular endothelial growth factor A(VEGF-A)(OR=1.078,95%CI 1.011 to 1.150)were associated with an increased risk of CRC(all P<0.05).Metabolomics association analysis further identified 144 serum metabolites significantly correlated with these four key inflammatory cytokines(FDR<0.05),suggesting that they may regulate CRC risk through inflammatory pathways.Conclusion:Specific inflammatory cytokines and serum metabolites have causal relationships with the risk of CRC.These findings provide insights for further exploration of potential risk factors and the development of effective prevention strategies for CRC.
文摘为探究布鲁菌感染宿主细胞早期泛素化修饰蛋白质组表达变化并筛选出影响免疫应答的关键调控蛋白,通过Label-free和泛素化富集技术以及高分辨率LC-MS/MS联用的定量蛋白质组学研究策略,对布鲁菌16M感染11 h (感染5 h,胞内复制6 h)后的巨噬细胞和未感染布鲁菌16M的巨噬细胞进行了泛素化蛋白质组学定量研究,数据库检索分析了16M感染后的巨噬细胞和未感染的巨噬细胞差异表达的泛素化位点对应的蛋白质,并应用生物信息学方法筛选出16M感染巨噬细胞后可造成宿主免疫抑制的关键蛋白质。结果显示,共鉴定出349个蛋白质上580个泛素化位点。布鲁菌16M感染组相对于未感染组167个蛋白质上259个位点泛素化修饰水平发生上调,212个蛋白质上321个位点泛素化修饰水平发生下调(差异倍数>1.5,P<0.05);35个泛素化修饰差异表达的蛋白质可能与布鲁菌感染后宿主的免疫应答有关,其中27个泛素化修饰的下调蛋白质(如Bcap31、Btk、Faf1和Akap31等),1个泛素化修饰上调蛋白质Ubqln1可能是布鲁菌感染宿主后造成免疫抑制的关键蛋白。本研究筛选获得了布鲁菌16M感染宿主细胞免疫相关差异表达的泛素化修饰蛋白质,初步揭示布鲁菌能够调控宿主免疫信号通路、自噬和凋亡等免疫应答过程中相关蛋白质的泛素化修饰,为进一步研究布鲁菌感染后调节宿主泛素化修饰进而形成免疫逃逸的分子机制提供理论基础。
文摘目的基于代谢组学探讨中药(复方/单味)治疗不同物种冠心病血瘀证所筛选到的差异代谢物,总结中药干预冠心病血瘀证后的生物标志物及相关代谢通路。方法从中国知网、万方数据库、维普数据库、Embase、PubMed、the Cochrane Library、Web of Science数据库中检索中药(复方/单味)治疗冠心病血瘀证的代谢组学研究。对纳入研究的差异代谢物进行汇总,采用HMDB、PubChem-Subs、KEGG对代谢物进行分子注释,对代谢产物路径可视化采用metPA网络软件进行分析。结果共有8篇文献纳入本研究,计算两个物种中重复出现的代谢物后共统计89个差异代谢物主要参与了132条代谢路径。通过通路拓扑分析并对重复出现的代谢通路进行统计后选出了16条P值小于0.05的代谢通路作为中药(复方/单味)治疗不同物种冠心病血瘀证的代谢通路。对于富集于各条差异性代谢通路上的代谢物,在不同研究中重复筛选到的代谢物包括:苯丙氨酸,谷氨酰胺,甘氨酸,柠檬酸盐,胆碱,肌酸,乳酸,葡萄糖,花生四烯酸。结论各项研究中用于冠心病血瘀证治疗的中药(复方/单味)以血府逐瘀汤、桃红四物汤、养心通脉方、苏合香为代表。基于代谢组学的中药(复方/单味)治疗冠心病血瘀证的生物信息学分析显示其作用机制涉及糖代谢、氨基酸代谢、能量代谢、胆碱代谢、脂肪酸代谢等多个方面,基本的三羧酸循环参与其中。总结了包括乳酸、葡萄糖、柠檬酸、花生四烯酸、肌酸、苯丙氨酸、胆碱、谷氨酰胺以及甘氨酸在内的与冠心病血瘀证证候相关的差异代谢物。
