Jujube witches’broom(JWB)caused by phytoplasma has a severely negative effect on multiple metabolisms in jujube.The GST gene family in plants participates in the regulation of a variety of biotic and abiotic stresses...Jujube witches’broom(JWB)caused by phytoplasma has a severely negative effect on multiple metabolisms in jujube.The GST gene family in plants participates in the regulation of a variety of biotic and abiotic stresses.This study aims to identify and reveal the changes in the jujube GST gene family in response to phytoplasma infection.Here,70 ZjGSTs were identified in the jujube genome and divided into 8 classes.Among them,the Tau-class,including 44 genes,was the largest.Phylogenetic analysis indicated that Tau-class genes were highly conserved among species,such as Arabidopsis,cotton,chickpea,and rice.Through chromosome location analysis,37.1%of genes were clustered,and 8 of 9 gene clusters were composed of Tau class members.Through RT-PCR,qRT-PCR and enzyme activity detection,the results showed that the expression of half(20/40)of the tested ZjGSTs was inhibited by phytoplasma infection in field and tissue culture conditions,and GST activity was also significantly reduced.In the resistant and susceptible varieties under phytoplasma infection,ZjGSTU49-ZjGSTU54 in the cluster IV showed opposite expression patterns,which may be due to functional divergence during evolution.Some upregulated genes(ZjGSTU45,ZjGSTU49,ZjGSTU59,and ZjGSTU70)might be involved in the process of jujube against JWB.The yeast two-hybrid results showed that all 6 Tauclass proteins tested could form homodimers or heterodimers.Overall,the comprehensive analysis of the jujube GST gene family revealed that ZjGSTs responded actively to phytoplasma infection.Furthermore,some screened genes(ZjGSTU24,ZjGSTU49-52,ZjGSTU70,and ZjDHAR10)will contribute to further functional studies of jujube-phytoplasma interactions.展开更多
Reactive oxygen species(ROS) scavengers, including ascorbate peroxidase, superoxide dismutase, catalase and peroxidase, are the most commonly used biomarkers in assessing an organisms' response to many biotic and ...Reactive oxygen species(ROS) scavengers, including ascorbate peroxidase, superoxide dismutase, catalase and peroxidase, are the most commonly used biomarkers in assessing an organisms' response to many biotic and abiotic stresses. In this study, we cloned an 866 bp GST( phi) gene in Lemna minor and investigated its characteristics, expression and enzymatic activities under 75 μmol/L cadmium concentrations in comparison with other ROS scavengers. GST( phi) gene expression patterns were similar to those of other scavengers of ROS. This suggests that GST( phi) might be involved in responding to heavy metal(cadmium) stress and that its expression level could be used as a bio-indicator in monitoring cadmium pollution.展开更多
AIM: Phase Ⅰ/Ⅱ enzymes metabolize environmental carcinogens and several functional polymorphisms have been reported in their encoding genes. Although their significance with regard to esophageal carcinogenicity has ...AIM: Phase Ⅰ/Ⅱ enzymes metabolize environmental carcinogens and several functional polymorphisms have been reported in their encoding genes. Although their significance with regard to esophageal carcinogenicity has been examined epidemiologically, it remains controversial. The present systematic review of the literature was performed to clarify associations.METHODS: Eligible studies were case-control or cohort studies published until September 2004 that were written in any language. From PubMed and a manual review of reference lists in relevant review articles, we obtained 16 studies related to the CYP1A1 Ile-Val substitution in exon 7, CYP1A1MspI polymorphisms, CYP2E1 RsaI polymorphisms,GSTM1 null type, GSTT1 null type and GSTP1 Ile104Val.All were of case-control design. Summary statistics were odds ratios (ORs) comparing heterozygous-, homozygousnon-wild type or these two in combination with the homozygous wild type, or the null type with the non-null type for GSTM1 and GSTT1. A random effect model was used to estimate the summary ORs. A meta-regression analysis was applied to explore sources of heterogeneity. RESULTS: Individuals with the Ile-Val substitution in CYP1A1 exon 7 had increased esophageal cancer risk,with ORs (95%CI) compared with Ile/Ile of 1.37 (1.09-1.71),2.52 (1.62-3.91) and 1.44 (1.17-1.78) for Ile-Val, Val/Val genotype and the combined group. No significant association was found between esophageal cancer risk and the other genetic parameters.CONCLUSION: A significant association exists between the CYP1A1 Ile-Val polymorphism and risk of esophageal cancer. Polymorphisms that increase the internal exposure to activated carcinogens may increase the risk of esophageal cancer.展开更多
Objective:To investigate the influence of GST-π gene transfer on drug-resistance of human cord blood CD34 + cells.Methods:CD34 + cells were purified from cord blood from normal full-term pregnancy.Gene transduction i...Objective:To investigate the influence of GST-π gene transfer on drug-resistance of human cord blood CD34 + cells.Methods:CD34 + cells were purified from cord blood from normal full-term pregnancy.Gene transduction into human cord blood CD34 + cells was carried out using GST-π gene containing retrovirus vector.The GST-π gene expression in transduced CD34 + cell was confirmed by RT-PCR.After confirmation of GST-π gene transfer,the transfected CD34 + cells were cultured by colony assay in the presence of carboplatin.Results:GST-π mRNA was detected in 30% of CFU-GM derived from GST-π gene transduced CD34 + cells.In vitro drug resistance test showed that the number of CFU-GM formed was significantly higher (2～3 fold) in GST-π gene transduced CD34 + cells than untransduced CD34 +cells.Conclusion:GST-π gene transfer can confer resistance to hematopoietic progenitors against carboplatin in vitro.展开更多
Objective :To investigate the influence of GST πgenetransferintohumancord blood hematopoie ticstem cellson their drugres is tanceagains tanti tumordrugs invivo .Methods: GST πgenetran sfectionin to human cord blood ...Objective :To investigate the influence of GST πgenetransferintohumancord blood hematopoie ticstem cellson their drugres is tanceagains tanti tumordrugs invivo .Methods: GST πgenetran sfectionin to human cord blood CD 34+cells was carried outusing are trovirusvec torPLJ GST πwith the aido f fibronect in .Succes sfulgenetransfer was confirmed by invitrocolony assay and RT PCR .GST πgenetrans duced human cord blood CD34+cells were the nengrafted in to 4 week old total body irradiated NOD/Scid mice and carboplatin was intraperitoneally admin is tered sequentially at 4 weeks interval 4 week saftereng raftment.Results :Peripheral blood (PB) WBC was significantly higher in GST πmice than control mice after 2 course of car boplat in .Retroviral GST π expression in bone marrow hematopoietic progenitor cells of recipient mice was detected by RT PCR 16 weeks after Xenotransplantation .Conclusion :The transfection of GST π gene could confer ,to some extent ,resistance to cord blood stem cells against carboplatin in vivo .展开更多
基金supported by grants from the National Key R&D Program Project Funding(Grant No.2018YFD1000607)the Foundation for 100 Innovative Talents of Hebei Province(Grant No.SLRC2019031)+1 种基金the National Natural Science Foundation of China(Grant No.31772285)the Hebei Province Innovation Foundation for Postgraduates(Grant No.CXZZBS2020097)。
文摘Jujube witches’broom(JWB)caused by phytoplasma has a severely negative effect on multiple metabolisms in jujube.The GST gene family in plants participates in the regulation of a variety of biotic and abiotic stresses.This study aims to identify and reveal the changes in the jujube GST gene family in response to phytoplasma infection.Here,70 ZjGSTs were identified in the jujube genome and divided into 8 classes.Among them,the Tau-class,including 44 genes,was the largest.Phylogenetic analysis indicated that Tau-class genes were highly conserved among species,such as Arabidopsis,cotton,chickpea,and rice.Through chromosome location analysis,37.1%of genes were clustered,and 8 of 9 gene clusters were composed of Tau class members.Through RT-PCR,qRT-PCR and enzyme activity detection,the results showed that the expression of half(20/40)of the tested ZjGSTs was inhibited by phytoplasma infection in field and tissue culture conditions,and GST activity was also significantly reduced.In the resistant and susceptible varieties under phytoplasma infection,ZjGSTU49-ZjGSTU54 in the cluster IV showed opposite expression patterns,which may be due to functional divergence during evolution.Some upregulated genes(ZjGSTU45,ZjGSTU49,ZjGSTU59,and ZjGSTU70)might be involved in the process of jujube against JWB.The yeast two-hybrid results showed that all 6 Tauclass proteins tested could form homodimers or heterodimers.Overall,the comprehensive analysis of the jujube GST gene family revealed that ZjGSTs responded actively to phytoplasma infection.Furthermore,some screened genes(ZjGSTU24,ZjGSTU49-52,ZjGSTU70,and ZjDHAR10)will contribute to further functional studies of jujube-phytoplasma interactions.
基金Supported by the National Natural Science Foundation of China(No.31370296)the Shandong Provincial Natural Science Foundation of China(Nos.Y2007D34,ZR2011CM044)the Key Technologies R&D Program of Shandong Province of China(No.2010GNC10937)
文摘Reactive oxygen species(ROS) scavengers, including ascorbate peroxidase, superoxide dismutase, catalase and peroxidase, are the most commonly used biomarkers in assessing an organisms' response to many biotic and abiotic stresses. In this study, we cloned an 866 bp GST( phi) gene in Lemna minor and investigated its characteristics, expression and enzymatic activities under 75 μmol/L cadmium concentrations in comparison with other ROS scavengers. GST( phi) gene expression patterns were similar to those of other scavengers of ROS. This suggests that GST( phi) might be involved in responding to heavy metal(cadmium) stress and that its expression level could be used as a bio-indicator in monitoring cadmium pollution.
文摘AIM: Phase Ⅰ/Ⅱ enzymes metabolize environmental carcinogens and several functional polymorphisms have been reported in their encoding genes. Although their significance with regard to esophageal carcinogenicity has been examined epidemiologically, it remains controversial. The present systematic review of the literature was performed to clarify associations.METHODS: Eligible studies were case-control or cohort studies published until September 2004 that were written in any language. From PubMed and a manual review of reference lists in relevant review articles, we obtained 16 studies related to the CYP1A1 Ile-Val substitution in exon 7, CYP1A1MspI polymorphisms, CYP2E1 RsaI polymorphisms,GSTM1 null type, GSTT1 null type and GSTP1 Ile104Val.All were of case-control design. Summary statistics were odds ratios (ORs) comparing heterozygous-, homozygousnon-wild type or these two in combination with the homozygous wild type, or the null type with the non-null type for GSTM1 and GSTT1. A random effect model was used to estimate the summary ORs. A meta-regression analysis was applied to explore sources of heterogeneity. RESULTS: Individuals with the Ile-Val substitution in CYP1A1 exon 7 had increased esophageal cancer risk,with ORs (95%CI) compared with Ile/Ile of 1.37 (1.09-1.71),2.52 (1.62-3.91) and 1.44 (1.17-1.78) for Ile-Val, Val/Val genotype and the combined group. No significant association was found between esophageal cancer risk and the other genetic parameters.CONCLUSION: A significant association exists between the CYP1A1 Ile-Val polymorphism and risk of esophageal cancer. Polymorphisms that increase the internal exposure to activated carcinogens may increase the risk of esophageal cancer.
文摘Objective:To investigate the influence of GST-π gene transfer on drug-resistance of human cord blood CD34 + cells.Methods:CD34 + cells were purified from cord blood from normal full-term pregnancy.Gene transduction into human cord blood CD34 + cells was carried out using GST-π gene containing retrovirus vector.The GST-π gene expression in transduced CD34 + cell was confirmed by RT-PCR.After confirmation of GST-π gene transfer,the transfected CD34 + cells were cultured by colony assay in the presence of carboplatin.Results:GST-π mRNA was detected in 30% of CFU-GM derived from GST-π gene transduced CD34 + cells.In vitro drug resistance test showed that the number of CFU-GM formed was significantly higher (2～3 fold) in GST-π gene transduced CD34 + cells than untransduced CD34 +cells.Conclusion:GST-π gene transfer can confer resistance to hematopoietic progenitors against carboplatin in vitro.
文摘Objective :To investigate the influence of GST πgenetransferintohumancord blood hematopoie ticstem cellson their drugres is tanceagains tanti tumordrugs invivo .Methods: GST πgenetran sfectionin to human cord blood CD 34+cells was carried outusing are trovirusvec torPLJ GST πwith the aido f fibronect in .Succes sfulgenetransfer was confirmed by invitrocolony assay and RT PCR .GST πgenetrans duced human cord blood CD34+cells were the nengrafted in to 4 week old total body irradiated NOD/Scid mice and carboplatin was intraperitoneally admin is tered sequentially at 4 weeks interval 4 week saftereng raftment.Results :Peripheral blood (PB) WBC was significantly higher in GST πmice than control mice after 2 course of car boplat in .Retroviral GST π expression in bone marrow hematopoietic progenitor cells of recipient mice was detected by RT PCR 16 weeks after Xenotransplantation .Conclusion :The transfection of GST π gene could confer ,to some extent ,resistance to cord blood stem cells against carboplatin in vivo .
