The ATP-binding cassette(ABC)transporter is a gene superfamily in plants.ATP-binding cassette subfamily C(ABCC)protein is a multidrug resistance-associated(MRP)transporter.They play various roles in plant growth,devel...The ATP-binding cassette(ABC)transporter is a gene superfamily in plants.ATP-binding cassette subfamily C(ABCC)protein is a multidrug resistance-associated(MRP)transporter.They play various roles in plant growth,development,and secondary metabolite transport.However,there are few studies on ABCC transporters in tea plants.In this study,genome-wide association study(GWAS)analysis of epigallocatechin gallate(EGCG)content in 108 strains of Kingbird revealed that CsABCCs may be involved in EGCG transport.We identified 25 CsABCC genes at the genomic level of the tea plant,their phylogenetic tree,gene structure,targeted miRNA and other bioinformatics were analyzed.The expression patterns of CsABCCs in eight different tissues and abiotic stress indicate that they have potential roles in regulating the growth,development,and defense of tea plants.The correlation analysis revealed that the expression of the CsABCC11 gene was closely related to the EGCG content in tea buds of 108 strains of the Kingbird,and the subcellular localization experiments in tobacco showed that CsABCC11 protein was localized on the plasma membrane.The virus-induced gene silencing(VIGS)strategy in tea plants further verified that CsABCC11 was involved in EGCG accumulation.Our study laid a foundation for studying the biological function of CsABCC and provided a new candidate molecular marker gene for further EGCG-related variety breeding,which will be of great interest to breeders.展开更多
BACKGROUND Transient neonatal diabetes mellitus(TNDM)is a rare form of diabetes mellitus that usually presents within the first 6 mo of life.Patients often enter remission within several months,although relapse can oc...BACKGROUND Transient neonatal diabetes mellitus(TNDM)is a rare form of diabetes mellitus that usually presents within the first 6 mo of life.Patients often enter remission within several months,although relapse can occur later in life.Mutations in the ABCC8 gene,which encodes the sulfonylurea receptor 1 of the ATP-sensitive potassium channel in pancreatic beta cells,are associated with TNDM and permanent neonatal diabetes.This study describes a novel de novo c.3880C>T heterozygous ABCC8 variant that causes TNDM and can be treated with sulfonylurea therapy.CASE SUMMARY We retrospectively analyzed 2 Chinese patients with TNDM who were diagnosed,treated,or referred for follow-up between September 2017 and September 2023.The patients were tested for mutations using targeted next-generation sequencing.Patients with neonatal diabetes mellitus caused by a c.3880C>T heterozygous missense variant in the ABCC8 gene have not been reported before.Both children had an onset of post-infectious diabetic ketoacidosis,which is worth noting.At a follow-up visit after discontinuing insulin injection,oral glyburide was found to be effective with no adverse reactions.CONCLUSION Early genetic testing of neonatal diabetes mellitus aids in accurate diagnosis and treatment and helps avoid daily insulin injections that may cause pain.展开更多
Multidrug Resistance Protein 2 (MRP2) is an ATP-dependent transmembrane protein that plays a pivotal role in the efflux of a wide variety of physiological substrates across the plasma membrane. Several studies have sh...Multidrug Resistance Protein 2 (MRP2) is an ATP-dependent transmembrane protein that plays a pivotal role in the efflux of a wide variety of physiological substrates across the plasma membrane. Several studies have shown that MRP2 can significantly affect the absorption, distribution, metabolism, excretion, and toxicity (ADMET) profiles of many therapeutic drugs and chemicals found in the environment and diet. This transporter can also efflux newly developed anticancer agents that target specific signaling pathways and are major clinical markers associated with multidrug resistance (MDR) of several types of cancers. MDR remains a major limitation to the advancement of the combinatorial chemotherapy regimen in cancer treatment. In addition to anticancer agents, MRP2 reduces the efficacy of various drug classes such as antivirals, antimalarials, and antibiotics. The unique role of MRP2 and its contribution to MDR makes it essential to profile drug-transporter interactions for all new and promising drugs. Thus, this current research seeks to identify modulators of MRP2 protein expression levels using cell-based assays. A unique recently approved FDA library (372 drugs) was screened using a high-throughput In-Cell ELISA assay to determine the effect of these therapeutic agents on protein expression levels of MRP2. A total of 49 FDA drugs altered MRP2 protein expression levels by more than 50% representing 13.17% of the compounds screened. Among the identified hits, thirty-nine (39) drugs increased protein expression levels whereas 10 drugs lowered protein expression levels of MRP2 after drug treatment. Our findings from this initial drug screening showed that modulators of MRP2 peregrinate multiple drug families and signify the importance of profiling drug interactions with this transporter. Data from this study provides essential information to improve combinatorial drug therapy and precision medicine as well as reduce the drug toxicity of various cancer chemotherapies.展开更多
目的探讨白三烯受体拮抗剂(leukotriene receptor antagonists,LTRA)与ATP结合盒亚家族C1(ATP-binding cassette sub-family C member 1,ABCC1)基因rs119774位点、溶质载体有机阴离子转运蛋白家族成员2B1(solute carrier organic anion ...目的探讨白三烯受体拮抗剂(leukotriene receptor antagonists,LTRA)与ATP结合盒亚家族C1(ATP-binding cassette sub-family C member 1,ABCC1)基因rs119774位点、溶质载体有机阴离子转运蛋白家族成员2B1(solute carrier organic anion transporter family member 2B1,SLCO2B1)基因rs12422149位点的单核苷酸多态性(single nucleotide polymorphism,SNP)治疗汉族儿童支气管哮喘疗效的相关性。方法选取2019年4月至2021年12月于福建中医药大学附属厦门市中医院就诊的4~13岁汉族支气管哮喘患儿100例为研究对象,采用一代测序法对患儿的ABCC1基因rs119774位点、SLCO2B1基因rs12422149位点进行检测,分析比较2个位点的SNP分布情况。入组患儿均应用LTRA进行治疗,分别于治疗前与治疗12周时进行肺通气功能及脉冲震荡功能检测,并评估临床症状控制水平,分析患儿疗效与SNP的相关性。统计学方法采用t检验、χ^(2)检验。结果治疗前与治疗12周后,ABCC1基因rs119774位点CC型哮喘患儿应用孟鲁司特钠第1秒用力呼气容积(forced expiratory volume in the first second,FEV_(1))[(87.0±16.5)与(93.2±15.1)L,t=-2.071,P=0.038]、峰值呼气流速(peak expiratory flow,PEF)[(77.1±16.9)与(86.5±16.6)L/s,t=-3.233,P=0.001]和25%肺活量的呼气流速(forced expiratory flow 25,FEF25)[(69.6±18.8)与(78.1±19.9)L/s,t=-1.985,P=0.047]均有明显提高,脉冲震荡各项指标显著改善(P<0.05)。治疗后SLCO2B1基因rs12422149位点AA型肺功能指标PEF高于治疗前[(79.0±16.0)与(93.0±9.4)L/s,t=-2.547,P=0.011],治疗后GG型肺功能各指标显著高于治疗前(P<0.05)。ABCC1治疗前后控制率[59%(59/100)与78%(78/100),78%(78/100),χ^(2)=20.964,P<0.001];治疗前后SLCO2B1基因rs119774位点AA型、AG型、GG型的控制率分别为[59%(59/100)与78%(78/100),78%(78/100),χ^(2)=20.964,P<0.001]、[53%(8/15)与80%(12/15),93%(14/15)χ^(2)=12.786,P=0.002]与[56%(23/41)与78%(32/41),78%(32/41),χ^(2)=6.583,P=0.037]与[73%(32/44)与77%(34/44),73%(32/44),χ^(2)=6.471,P=0.039],均显著改善。结论LTRA治疗汉族支气管哮喘患儿与ABCC1、SLCO2B1基因SNP的效果存在相关性。展开更多
ATP binding cassette subfamily C member 8(ABCC8)encodes a protein regulating the ATP-sensitive potassium channel.Whether the level of ABCC8 mRNA in lower grade glioma(LGG)correlates with immune cell infiltration and p...ATP binding cassette subfamily C member 8(ABCC8)encodes a protein regulating the ATP-sensitive potassium channel.Whether the level of ABCC8 mRNA in lower grade glioma(LGG)correlates with immune cell infiltration and patient outcomes has not been evaluated until now.Comparisons of ABCC8 expression between different tumors and normal tissues were evaluated by exploring publicly available datasets.The association between ABCC8 and tumor immune cell infiltration,diverse gene mutation characteristics,tumor mutation burden(TMB),and survival in LGG was also investigated in several independent datasets.Pathway enrichment analysis was conducted to search for ABCC8-associated signaling pathways.Through an online database,we found that ABCC8 expression in LGG was lower than in normal tissues.Then,the association of ABCC8 expression and immune cell infiltration in LGG was discussed.As we expected,the ABCC8 mRNA levels were negatively associated with non-T immune cell infiltration levels in all datasets.Consistently,TCGA_LGG RNA-seq data revealed that ABCC8 downregulated several non-T immune cell-associated signaling pathways in gene set enrichment analysis.Different ABCC8 expression groups showed diverse gene mutation characteristics and TMB.The high expression of ABCC8 was linked to improved survival of LGG patients.A pathway enrichment analysis of ABCC8-associated genes indicated that the GABAergic synapse signaling pathway might be involved in regulating immunity in LGG.Our findings show that ABCC8 reflects LGG tumor immunity and is an ideal prognostic biomarker for LGG.展开更多
BACKGROUND Neonatal hyperinsulinism can result from perinatal stress,genetic disorders,or syndromes,which can lead to persistent or intractable hypoglycemia in newborns.Mutations in the ABCC8 gene result in abnormal f...BACKGROUND Neonatal hyperinsulinism can result from perinatal stress,genetic disorders,or syndromes,which can lead to persistent or intractable hypoglycemia in newborns.Mutations in the ABCC8 gene result in abnormal functioning of potassium channel proteins in pancreaticβ-cells,leading to an overproduction of insulin and congenital hyperinsulinemia.CASE SUMMARY We report a case of a high-birth-weight infant with postnatal hypoglycemia and hyperinsulinemia,whose mother had pregestational diabetes mellitus with poor glycemic control and whose sister had a similar history at birth.Whole-exome sequencing revealed a new mutation in the ABCC8 gene in exon 8(c.1257T>G),which also occurred in his sister and mother;thus,the patient was diagnosed with neonatal hyperinsulinism with an ABCC8 mutation.With oral diazoxide treatment,the child’s blood glucose returned to normal,and the pediatrician gradually discontinued treatment because of the child’s good growth and development.CONCLUSION We report a new mutation locus in the ABCC8 gene.This mutation locus warrants attention for genetic disorders and long-term prognoses of hypoglycemic children.展开更多
基金supported by the Guizhou University Talent Introduction Program([2021]05)Guizhou University Cultivation Program([2020]48)+2 种基金Institute of Technology of YF([2022]017)Guizhou Province High-Level Innovative Talents“Hundred”Level Talent Project(Qiankehe Platform Talent)GCC[2023]014Supported by the earmarked fund for GZMARS-Tea and Research on the Planting Technology of China HUANENG Photovoltaic Tea Garden(Project No.HNKJ2022-H135).
文摘The ATP-binding cassette(ABC)transporter is a gene superfamily in plants.ATP-binding cassette subfamily C(ABCC)protein is a multidrug resistance-associated(MRP)transporter.They play various roles in plant growth,development,and secondary metabolite transport.However,there are few studies on ABCC transporters in tea plants.In this study,genome-wide association study(GWAS)analysis of epigallocatechin gallate(EGCG)content in 108 strains of Kingbird revealed that CsABCCs may be involved in EGCG transport.We identified 25 CsABCC genes at the genomic level of the tea plant,their phylogenetic tree,gene structure,targeted miRNA and other bioinformatics were analyzed.The expression patterns of CsABCCs in eight different tissues and abiotic stress indicate that they have potential roles in regulating the growth,development,and defense of tea plants.The correlation analysis revealed that the expression of the CsABCC11 gene was closely related to the EGCG content in tea buds of 108 strains of the Kingbird,and the subcellular localization experiments in tobacco showed that CsABCC11 protein was localized on the plasma membrane.The virus-induced gene silencing(VIGS)strategy in tea plants further verified that CsABCC11 was involved in EGCG accumulation.Our study laid a foundation for studying the biological function of CsABCC and provided a new candidate molecular marker gene for further EGCG-related variety breeding,which will be of great interest to breeders.
基金Supported by the Department of Science and Technology of Henan Province,China,No.222102310461。
文摘BACKGROUND Transient neonatal diabetes mellitus(TNDM)is a rare form of diabetes mellitus that usually presents within the first 6 mo of life.Patients often enter remission within several months,although relapse can occur later in life.Mutations in the ABCC8 gene,which encodes the sulfonylurea receptor 1 of the ATP-sensitive potassium channel in pancreatic beta cells,are associated with TNDM and permanent neonatal diabetes.This study describes a novel de novo c.3880C>T heterozygous ABCC8 variant that causes TNDM and can be treated with sulfonylurea therapy.CASE SUMMARY We retrospectively analyzed 2 Chinese patients with TNDM who were diagnosed,treated,or referred for follow-up between September 2017 and September 2023.The patients were tested for mutations using targeted next-generation sequencing.Patients with neonatal diabetes mellitus caused by a c.3880C>T heterozygous missense variant in the ABCC8 gene have not been reported before.Both children had an onset of post-infectious diabetic ketoacidosis,which is worth noting.At a follow-up visit after discontinuing insulin injection,oral glyburide was found to be effective with no adverse reactions.CONCLUSION Early genetic testing of neonatal diabetes mellitus aids in accurate diagnosis and treatment and helps avoid daily insulin injections that may cause pain.
文摘Multidrug Resistance Protein 2 (MRP2) is an ATP-dependent transmembrane protein that plays a pivotal role in the efflux of a wide variety of physiological substrates across the plasma membrane. Several studies have shown that MRP2 can significantly affect the absorption, distribution, metabolism, excretion, and toxicity (ADMET) profiles of many therapeutic drugs and chemicals found in the environment and diet. This transporter can also efflux newly developed anticancer agents that target specific signaling pathways and are major clinical markers associated with multidrug resistance (MDR) of several types of cancers. MDR remains a major limitation to the advancement of the combinatorial chemotherapy regimen in cancer treatment. In addition to anticancer agents, MRP2 reduces the efficacy of various drug classes such as antivirals, antimalarials, and antibiotics. The unique role of MRP2 and its contribution to MDR makes it essential to profile drug-transporter interactions for all new and promising drugs. Thus, this current research seeks to identify modulators of MRP2 protein expression levels using cell-based assays. A unique recently approved FDA library (372 drugs) was screened using a high-throughput In-Cell ELISA assay to determine the effect of these therapeutic agents on protein expression levels of MRP2. A total of 49 FDA drugs altered MRP2 protein expression levels by more than 50% representing 13.17% of the compounds screened. Among the identified hits, thirty-nine (39) drugs increased protein expression levels whereas 10 drugs lowered protein expression levels of MRP2 after drug treatment. Our findings from this initial drug screening showed that modulators of MRP2 peregrinate multiple drug families and signify the importance of profiling drug interactions with this transporter. Data from this study provides essential information to improve combinatorial drug therapy and precision medicine as well as reduce the drug toxicity of various cancer chemotherapies.
文摘目的探讨白三烯受体拮抗剂(leukotriene receptor antagonists,LTRA)与ATP结合盒亚家族C1(ATP-binding cassette sub-family C member 1,ABCC1)基因rs119774位点、溶质载体有机阴离子转运蛋白家族成员2B1(solute carrier organic anion transporter family member 2B1,SLCO2B1)基因rs12422149位点的单核苷酸多态性(single nucleotide polymorphism,SNP)治疗汉族儿童支气管哮喘疗效的相关性。方法选取2019年4月至2021年12月于福建中医药大学附属厦门市中医院就诊的4~13岁汉族支气管哮喘患儿100例为研究对象,采用一代测序法对患儿的ABCC1基因rs119774位点、SLCO2B1基因rs12422149位点进行检测,分析比较2个位点的SNP分布情况。入组患儿均应用LTRA进行治疗,分别于治疗前与治疗12周时进行肺通气功能及脉冲震荡功能检测,并评估临床症状控制水平,分析患儿疗效与SNP的相关性。统计学方法采用t检验、χ^(2)检验。结果治疗前与治疗12周后,ABCC1基因rs119774位点CC型哮喘患儿应用孟鲁司特钠第1秒用力呼气容积(forced expiratory volume in the first second,FEV_(1))[(87.0±16.5)与(93.2±15.1)L,t=-2.071,P=0.038]、峰值呼气流速(peak expiratory flow,PEF)[(77.1±16.9)与(86.5±16.6)L/s,t=-3.233,P=0.001]和25%肺活量的呼气流速(forced expiratory flow 25,FEF25)[(69.6±18.8)与(78.1±19.9)L/s,t=-1.985,P=0.047]均有明显提高,脉冲震荡各项指标显著改善(P<0.05)。治疗后SLCO2B1基因rs12422149位点AA型肺功能指标PEF高于治疗前[(79.0±16.0)与(93.0±9.4)L/s,t=-2.547,P=0.011],治疗后GG型肺功能各指标显著高于治疗前(P<0.05)。ABCC1治疗前后控制率[59%(59/100)与78%(78/100),78%(78/100),χ^(2)=20.964,P<0.001];治疗前后SLCO2B1基因rs119774位点AA型、AG型、GG型的控制率分别为[59%(59/100)与78%(78/100),78%(78/100),χ^(2)=20.964,P<0.001]、[53%(8/15)与80%(12/15),93%(14/15)χ^(2)=12.786,P=0.002]与[56%(23/41)与78%(32/41),78%(32/41),χ^(2)=6.583,P=0.037]与[73%(32/44)与77%(34/44),73%(32/44),χ^(2)=6.471,P=0.039],均显著改善。结论LTRA治疗汉族支气管哮喘患儿与ABCC1、SLCO2B1基因SNP的效果存在相关性。
基金This work was supported by the Scientific and Technological Innovation Program for Clinical Medicine of Jinan(202019132)to LIPING GONG.
文摘ATP binding cassette subfamily C member 8(ABCC8)encodes a protein regulating the ATP-sensitive potassium channel.Whether the level of ABCC8 mRNA in lower grade glioma(LGG)correlates with immune cell infiltration and patient outcomes has not been evaluated until now.Comparisons of ABCC8 expression between different tumors and normal tissues were evaluated by exploring publicly available datasets.The association between ABCC8 and tumor immune cell infiltration,diverse gene mutation characteristics,tumor mutation burden(TMB),and survival in LGG was also investigated in several independent datasets.Pathway enrichment analysis was conducted to search for ABCC8-associated signaling pathways.Through an online database,we found that ABCC8 expression in LGG was lower than in normal tissues.Then,the association of ABCC8 expression and immune cell infiltration in LGG was discussed.As we expected,the ABCC8 mRNA levels were negatively associated with non-T immune cell infiltration levels in all datasets.Consistently,TCGA_LGG RNA-seq data revealed that ABCC8 downregulated several non-T immune cell-associated signaling pathways in gene set enrichment analysis.Different ABCC8 expression groups showed diverse gene mutation characteristics and TMB.The high expression of ABCC8 was linked to improved survival of LGG patients.A pathway enrichment analysis of ABCC8-associated genes indicated that the GABAergic synapse signaling pathway might be involved in regulating immunity in LGG.Our findings show that ABCC8 reflects LGG tumor immunity and is an ideal prognostic biomarker for LGG.
文摘BACKGROUND Neonatal hyperinsulinism can result from perinatal stress,genetic disorders,or syndromes,which can lead to persistent or intractable hypoglycemia in newborns.Mutations in the ABCC8 gene result in abnormal functioning of potassium channel proteins in pancreaticβ-cells,leading to an overproduction of insulin and congenital hyperinsulinemia.CASE SUMMARY We report a case of a high-birth-weight infant with postnatal hypoglycemia and hyperinsulinemia,whose mother had pregestational diabetes mellitus with poor glycemic control and whose sister had a similar history at birth.Whole-exome sequencing revealed a new mutation in the ABCC8 gene in exon 8(c.1257T>G),which also occurred in his sister and mother;thus,the patient was diagnosed with neonatal hyperinsulinism with an ABCC8 mutation.With oral diazoxide treatment,the child’s blood glucose returned to normal,and the pediatrician gradually discontinued treatment because of the child’s good growth and development.CONCLUSION We report a new mutation locus in the ABCC8 gene.This mutation locus warrants attention for genetic disorders and long-term prognoses of hypoglycemic children.
