Certain amino acids changes in the human Na^(+)/K^(+)-ATPase pump,ATPase Na^(+)/K^(+)transporting subunit alpha 1(ATP1A1),cause Charcot-Marie-Tooth disease type 2(CMT2)disease and refractory seizures.To develop in viv...Certain amino acids changes in the human Na^(+)/K^(+)-ATPase pump,ATPase Na^(+)/K^(+)transporting subunit alpha 1(ATP1A1),cause Charcot-Marie-Tooth disease type 2(CMT2)disease and refractory seizures.To develop in vivo models to study the role of Na^(+)/K^(+)-ATPase in these diseases,we modified the Drosophila gene homolog,Atpα,to mimic the human ATP1A1 gene mutations that cause CMT2.Mutations located within the helical linker region of human ATP1A1(I592T,A597T,P600T,and D601F)were simultaneously introduced into endogenous Drosophila Atpαby CRISPR/Cas9-mediated genome editing,generating the Atpα^(TTTF)model.In addition,the same strategy was used to generate the corresponding single point mutations in flies(Atpα^(I571T),Atpα^(A576T),Atpα^(P579T),and Atpα^(D580F)).Moreover,a deletion mutation(Atpα^(mut))that causes premature termination of translation was generated as a positive control.Of these alleles,we found two that could be maintained as homozygotes(Atpα^(I571T)and Atpα^(P579T)).Three alleles(Atpα^(A576T),Atpα^(P579)and Atpα^(D580F))can form heterozygotes with the Atpαmut allele.We found that the Atpαallele carrying these CMT2-associated mutations showed differential phenotypes in Drosophila.Flies heterozygous for Atpα^(TTTF)mutations have motor performance defects,a reduced lifespan,seizures,and an abnormal neuronal morphology.These Drosophila models will provide a new platform for studying the function and regulation of the sodium-potassium pump.展开更多
目的对一个常染色体显性遗传的Van der Hoeve综合征家系进行详尽的临床表型分析及基因突变检测,明确该家系的致病基因突变位点及该突变对基因编码的影响。方法对收集到的Van der Hoeve综合征家系进行包括病史、体格检查及辅助检查在内...目的对一个常染色体显性遗传的Van der Hoeve综合征家系进行详尽的临床表型分析及基因突变检测,明确该家系的致病基因突变位点及该突变对基因编码的影响。方法对收集到的Van der Hoeve综合征家系进行包括病史、体格检查及辅助检查在内的临床资料的收集及外周血液样本的采集,并对22位家系成员进行外显子组测序以及Sanger测序,利用生物信息学软件分析数据。结果该家系共五代,各代连续发病,且每一代男女均可患病,符合常染色体显性遗传特点。该家系中12例患者均自出生时巩膜即呈蓝色且身材矮小,8例患者有骨折病史,可正常愈合,3例患者考虑有Van der Hoeve综合征所致的听力下降,12例患者的COL1A1基因第17号外显子有一个碱基的缺失(c.1128delT),使第376位后的氨基酸编码改变,在第539位提前结束氨基酸编码,该家系中10例无症状者无此突变。结论该家系患者确定为由COL1A1基因c.1128delT突变导致的Van der Hoeve综合征。展开更多
BACKGROUND Uridine diphosphate glucuronosyltransferase 1A1(UGT1A1)plays a crucial role in metabolizing and detoxifying endogenous and exogenous substances.However,its contribution to the progression of liver damage re...BACKGROUND Uridine diphosphate glucuronosyltransferase 1A1(UGT1A1)plays a crucial role in metabolizing and detoxifying endogenous and exogenous substances.However,its contribution to the progression of liver damage remains unclear.AIM To determine the role and mechanism of UGT1A1 in liver damage progression.METHODS We investigated the relationship between UGT1A1 expression and liver injury through clinical research.Additionally,the impact and mechanism of UGT1A1 on the progression of liver injury was analyzed through a mouse model study.RESULTS Patients with UGT1A1 gene mutations showed varying degrees of liver damage,while patients with acute-onchronic liver failure(ACLF)exhibited relatively reduced levels of UGT1A1 protein in the liver as compared to patients with chronic hepatitis.This suggests that low UGT1A1 levels may be associated with the progression of liver damage.In mouse models of liver injury induced by carbon tetrachloride(CCl_(4))and concanavalin A(ConA),the hepatic levels of UGT1A1 protein were found to be increased.In mice with lipopolysaccharide or liver steatosis-mediated liver-injury progression,the hepatic protein levels of UGT1A1 were decreased,which is consistent with the observations in patients with ACLF.UGT1A1 knockout exacerbated CCl_(4)-and ConA-induced liver injury,hepatocyte apoptosis and necroptosis in mice,intensified hepatocyte endoplasmic reticulum(ER)stress and oxidative stress,and disrupted lipid metabolism.CONCLUSION UGT1A1 is upregulated as a compensatory response during liver injury,and interference with this upregulation process may worsen liver injury.UGT1A1 reduces ER stress,oxidative stress,and lipid metabolism disorder,thereby mitigating hepatocyte apoptosis and necroptosis.展开更多
【目的】探明COL1A1(Collagen type I alpha 1 chain,I型胶原蛋白α1链)和COL1A2(Collagen type I alpha 2 chain,I型胶原蛋白α2链)基因在梅花鹿不同组织中的表达谱,解析其对梅花鹿组织发育的影响,为影响梅花鹿重要经济性状的候选基因...【目的】探明COL1A1(Collagen type I alpha 1 chain,I型胶原蛋白α1链)和COL1A2(Collagen type I alpha 2 chain,I型胶原蛋白α2链)基因在梅花鹿不同组织中的表达谱,解析其对梅花鹿组织发育的影响,为影响梅花鹿重要经济性状的候选基因筛选提供依据。【方法】采用RT-qPCR方法检测COL1A1和COL1A2基因在雄性梅花鹿心脏、肝脏和脾脏等16个组织器官中的表达水平;结合NetPhos 3.1、Motif Search和ProtParam等系列软件预测分析COL1A1和COL1A2基因的生物信息及其在梅花鹿不同组织中的表达谱,并在此基础上构建COL1A1和COL1A2氨基酸序列的系统发育进化树。【结果】COL1A1和COL1A2基因CDS区分别编码1463和1364个氨基酸,理论PI分别为5.60和9.19,COL1A1和COL1A2均是一种具有信号肽和磷酸化位点的亲水性稳定蛋白质;二者蛋白二级及三级结构均以无规则卷曲构成;与其他动物相比,鹿COL1A1和COL1A2基因均与反刍动物山羊、绵羊和牛的同源性最高,其中,鹿COL1A1基因与山羊、牛、绵羊的同源性分别为99.5%、99.5%和99.2%,鹿COL1A2基因与牛、绵羊、山羊的同源性分别为99.1%、99.0%和98.9%,亲缘关系最近。RT-qPCR结果显示,COL1A1和COL1A2基因在梅花鹿不同组织中均有表达,其中COL1A1基因在心脏、背最长肌和腿肌中的表达较高,显著高于其他组织,COL1A2基因在心脏、肝脏、肾脏和瓣胃中的表达较高,均显著高于其他组织;此外,COL1A1在肌肉组织中的表达较高,COL1A2较低;二者在其余组织中的表达具有一高一低,相互协同的作用趋势。【结论】COL1A1和COL1A2可能通过相互协同共同维持组织结构及组织发育,相关结果为后续深入研究COL1A1和COL1A2影响梅花鹿生长发育奠定基础。展开更多
The current letter to the editor pertains to the manuscript entitled'Uridine diphosphate glucuronosyltransferase 1A1 prevents the progression of liver injury'.Increased levels of uridine diphosphate glucuronos...The current letter to the editor pertains to the manuscript entitled'Uridine diphosphate glucuronosyltransferase 1A1 prevents the progression of liver injury'.Increased levels of uridine diphosphate glucuronosyltransferase 1A1 during liver injury could mitigate damage by reducing endoplasmic reticulum stress,oxidative stress,and dysregulated lipid metabolism,impeding hepatocyte apoptosis and necroptosis.展开更多
基金supported by the Natural Science Foundation of Fujian Province,No.2020J02027the National Natural Science Foundation of China,No.31970461the Foundation of NHC Key Laboratory of Technical Evaluation of Fertility Regulation for Non-human Primate,Fujian Maternity and Child Health Hospital,No.2022-NHP-05(all to WC).
文摘Certain amino acids changes in the human Na^(+)/K^(+)-ATPase pump,ATPase Na^(+)/K^(+)transporting subunit alpha 1(ATP1A1),cause Charcot-Marie-Tooth disease type 2(CMT2)disease and refractory seizures.To develop in vivo models to study the role of Na^(+)/K^(+)-ATPase in these diseases,we modified the Drosophila gene homolog,Atpα,to mimic the human ATP1A1 gene mutations that cause CMT2.Mutations located within the helical linker region of human ATP1A1(I592T,A597T,P600T,and D601F)were simultaneously introduced into endogenous Drosophila Atpαby CRISPR/Cas9-mediated genome editing,generating the Atpα^(TTTF)model.In addition,the same strategy was used to generate the corresponding single point mutations in flies(Atpα^(I571T),Atpα^(A576T),Atpα^(P579T),and Atpα^(D580F)).Moreover,a deletion mutation(Atpα^(mut))that causes premature termination of translation was generated as a positive control.Of these alleles,we found two that could be maintained as homozygotes(Atpα^(I571T)and Atpα^(P579T)).Three alleles(Atpα^(A576T),Atpα^(P579)and Atpα^(D580F))can form heterozygotes with the Atpαmut allele.We found that the Atpαallele carrying these CMT2-associated mutations showed differential phenotypes in Drosophila.Flies heterozygous for Atpα^(TTTF)mutations have motor performance defects,a reduced lifespan,seizures,and an abnormal neuronal morphology.These Drosophila models will provide a new platform for studying the function and regulation of the sodium-potassium pump.
文摘目的对一个常染色体显性遗传的Van der Hoeve综合征家系进行详尽的临床表型分析及基因突变检测,明确该家系的致病基因突变位点及该突变对基因编码的影响。方法对收集到的Van der Hoeve综合征家系进行包括病史、体格检查及辅助检查在内的临床资料的收集及外周血液样本的采集,并对22位家系成员进行外显子组测序以及Sanger测序,利用生物信息学软件分析数据。结果该家系共五代,各代连续发病,且每一代男女均可患病,符合常染色体显性遗传特点。该家系中12例患者均自出生时巩膜即呈蓝色且身材矮小,8例患者有骨折病史,可正常愈合,3例患者考虑有Van der Hoeve综合征所致的听力下降,12例患者的COL1A1基因第17号外显子有一个碱基的缺失(c.1128delT),使第376位后的氨基酸编码改变,在第539位提前结束氨基酸编码,该家系中10例无症状者无此突变。结论该家系患者确定为由COL1A1基因c.1128delT突变导致的Van der Hoeve综合征。
基金the Science and Technology Research Foundations of Guizhou Province,No.QKHJC-ZK(2022)YB642Zunyi Science and Technology Plan Project,No.ZSKHHZ(2022)344,No.ZSKHHZ(2022)360,and No.ZYK160+2 种基金Hubei Province Central Leading Local Science and Technology Development Special Project,No.2022BCE030Changzhou Science and Technology Projects,No.CE20225054Bijie City Science and Planning Bureau,No.BKH(2022)8.
文摘BACKGROUND Uridine diphosphate glucuronosyltransferase 1A1(UGT1A1)plays a crucial role in metabolizing and detoxifying endogenous and exogenous substances.However,its contribution to the progression of liver damage remains unclear.AIM To determine the role and mechanism of UGT1A1 in liver damage progression.METHODS We investigated the relationship between UGT1A1 expression and liver injury through clinical research.Additionally,the impact and mechanism of UGT1A1 on the progression of liver injury was analyzed through a mouse model study.RESULTS Patients with UGT1A1 gene mutations showed varying degrees of liver damage,while patients with acute-onchronic liver failure(ACLF)exhibited relatively reduced levels of UGT1A1 protein in the liver as compared to patients with chronic hepatitis.This suggests that low UGT1A1 levels may be associated with the progression of liver damage.In mouse models of liver injury induced by carbon tetrachloride(CCl_(4))and concanavalin A(ConA),the hepatic levels of UGT1A1 protein were found to be increased.In mice with lipopolysaccharide or liver steatosis-mediated liver-injury progression,the hepatic protein levels of UGT1A1 were decreased,which is consistent with the observations in patients with ACLF.UGT1A1 knockout exacerbated CCl_(4)-and ConA-induced liver injury,hepatocyte apoptosis and necroptosis in mice,intensified hepatocyte endoplasmic reticulum(ER)stress and oxidative stress,and disrupted lipid metabolism.CONCLUSION UGT1A1 is upregulated as a compensatory response during liver injury,and interference with this upregulation process may worsen liver injury.UGT1A1 reduces ER stress,oxidative stress,and lipid metabolism disorder,thereby mitigating hepatocyte apoptosis and necroptosis.
文摘【目的】探明COL1A1(Collagen type I alpha 1 chain,I型胶原蛋白α1链)和COL1A2(Collagen type I alpha 2 chain,I型胶原蛋白α2链)基因在梅花鹿不同组织中的表达谱,解析其对梅花鹿组织发育的影响,为影响梅花鹿重要经济性状的候选基因筛选提供依据。【方法】采用RT-qPCR方法检测COL1A1和COL1A2基因在雄性梅花鹿心脏、肝脏和脾脏等16个组织器官中的表达水平;结合NetPhos 3.1、Motif Search和ProtParam等系列软件预测分析COL1A1和COL1A2基因的生物信息及其在梅花鹿不同组织中的表达谱,并在此基础上构建COL1A1和COL1A2氨基酸序列的系统发育进化树。【结果】COL1A1和COL1A2基因CDS区分别编码1463和1364个氨基酸,理论PI分别为5.60和9.19,COL1A1和COL1A2均是一种具有信号肽和磷酸化位点的亲水性稳定蛋白质;二者蛋白二级及三级结构均以无规则卷曲构成;与其他动物相比,鹿COL1A1和COL1A2基因均与反刍动物山羊、绵羊和牛的同源性最高,其中,鹿COL1A1基因与山羊、牛、绵羊的同源性分别为99.5%、99.5%和99.2%,鹿COL1A2基因与牛、绵羊、山羊的同源性分别为99.1%、99.0%和98.9%,亲缘关系最近。RT-qPCR结果显示,COL1A1和COL1A2基因在梅花鹿不同组织中均有表达,其中COL1A1基因在心脏、背最长肌和腿肌中的表达较高,显著高于其他组织,COL1A2基因在心脏、肝脏、肾脏和瓣胃中的表达较高,均显著高于其他组织;此外,COL1A1在肌肉组织中的表达较高,COL1A2较低;二者在其余组织中的表达具有一高一低,相互协同的作用趋势。【结论】COL1A1和COL1A2可能通过相互协同共同维持组织结构及组织发育,相关结果为后续深入研究COL1A1和COL1A2影响梅花鹿生长发育奠定基础。
文摘The current letter to the editor pertains to the manuscript entitled'Uridine diphosphate glucuronosyltransferase 1A1 prevents the progression of liver injury'.Increased levels of uridine diphosphate glucuronosyltransferase 1A1 during liver injury could mitigate damage by reducing endoplasmic reticulum stress,oxidative stress,and dysregulated lipid metabolism,impeding hepatocyte apoptosis and necroptosis.
