目的探讨超级增强子(super enhancers,SE)-HOXC13-AS对胰腺癌生物学行为的影响及临床意义。方法采用qRT-PCR法检测HOXC13-AS在胰腺癌组织和细胞中的表达,分析HOXC13-AS表达与胰腺癌临床病理特征的关系。选择siRNA转染HOXC13-AS表达量最...目的探讨超级增强子(super enhancers,SE)-HOXC13-AS对胰腺癌生物学行为的影响及临床意义。方法采用qRT-PCR法检测HOXC13-AS在胰腺癌组织和细胞中的表达,分析HOXC13-AS表达与胰腺癌临床病理特征的关系。选择siRNA转染HOXC13-AS表达量最高的PANC-1细胞,应用CCK-8法、细胞周期实验、划痕实验、Transwell实验及细胞凋亡实验检测敲低HOXC13-AS对胰腺癌细胞增殖、迁移、侵袭及凋亡的影响。应用生物数据库分析和JQ1抑制剂验证SE与HOXC13-AS之间调控关系,并通过CCK-8法、划痕实验、Transwell实验及细胞凋亡实验检测抑制SE-HOXC13-AS对胰腺癌细胞增殖、迁移、侵袭及凋亡的影响。结果胰腺癌组织中HOXC13-AS平均表达量(4.40±6.21)显著高于癌旁组织(1.01±0.02,P<0.05),HOXC13-AS表达与胰腺癌分化程度和临床分期密切相关。与正常胰腺导管上皮细胞(0.93±0.11)相比,胰腺癌细胞株BXPC-3(2.55±0.19)、SW1990(5.49±0.92)、CF-PAC1(12.27±0.60)及PANC-1(70.39±6.40)中HOXC13-AS的表达升高(P<0.05)。敲低PANC-1细胞中HOXC13-AS表达可明显抑制胰腺癌细胞增殖、迁移和侵袭能力,促进细胞凋亡。抑制PANC-1细胞中SE可显著下调HOXC13-AS的表达(0.65±0.02 vs 0.41±0.02,P<0.05),并可能进一步抑制胰腺癌细胞增殖、迁移和侵袭能力,促进细胞凋亡。结论HOXC13-AS在胰腺癌中高表达,敲低HOXC13-AS可抑制胰腺癌的进展。SE调控HOXC13-AS的表达,并可能进一步影响胰腺癌的生物学行为。展开更多
Loesses are widely distributed all over the world,especially in China.Meanwhile,long-term agricultural irrigation and extreme climate changes have led to frequent geological disasters in the Heifangtai area of Lanzhou...Loesses are widely distributed all over the world,especially in China.Meanwhile,long-term agricultural irrigation and extreme climate changes have led to frequent geological disasters in the Heifangtai area of Lanzhou,Gansu,China.Of these,landslides are one of the most frequent types of disasters that are harmful to humans and the environment.A landslide is closely related to the lithology,structure,and groundwater of the site and consists of a combination of structure units divided by discontinuities,such as faults,joints,and fi ssures.Therefore,geological surveys,engineering drilling,and trenching are typically used to identify the stratum lithology,structure,and groundwater in order to visually display underground information within a limited depth range.However,these methods have disadvantages.In particular,geological surveys can only describe geological phenomena on the surface,while the cost of drilling and trenching may be high,along with the ineffi ciency of exploration.In this research,the integrated geophysical exploration method was used to analyze the hidden joints,cracks,and other discontinuities and geophysical features of the discontinuities.The results were verified by trench exploration,and large amounts of underground information were obtained,especially the spread and distribution of discontinuities in landslide areas.Such information can be effectively used for carrying out and providing meaningful experiences and lessons in future comprehensive geophysical processing and interpretations related to the prediction and evaluation of landslides.展开更多
Cuticular wax plays an important role in protecting land plant against biotic and abiotic stresses. Cuticular wax production on plant surface is often visualized by a characteristic glaucous appearance. This study ide...Cuticular wax plays an important role in protecting land plant against biotic and abiotic stresses. Cuticular wax production on plant surface is often visualized by a characteristic glaucous appearance. This study identified quantitative trait loci （QTLs） for wheat （Triticum aestivum L.） flag leaf glaucousness （FLG） using a high-density genetic linkage map developed from a recombinant inbred line （RIL） population derived from the cross HeynexLakin by single-seed descent. The map consisted of 2 068 single nucleotide polymorphism （SNP） markers and 157 simple sequence repeat （SSR） markers on all 21 wheat chromosomes and covered a genetic distance of 2 381.19 cM, with an average marker interval of 1.07 cM. Two additive QTLs for FLG were identified on chromosomes 3AL and 2DS with the increasing FLG allele contributed from Lakin. The major QTL on 3AL, QFIg.hwwgr-3AL, explained 17.5-37.8% of the phenotypic variation in different environments. QFIg.hwwgr-3AL was located in a 4.4-cM interval on chromosome 3AL that was flanked by two markers IWA1831 and IWA8374. Another QTL for FLG on 2DS, designated as QFIg.hwwgr-2DS which was identified only in Yangling in 2014 （YL14）, was flanked by IWA1939 and Xgwm261 and accounted for 11.3% of the phenotypic variation for FLG. QFIg.hww- gr-3AL and QFIg.hwwgr-2DS showed Additive×Environment （AE） interactions, explaining 3.5 and 4.4% of the phenotypic variance, respectively. Our results indicated that different genes/QTLs may contribute different scores of FLG in a cultivar and that the environment may play a role in FLG.展开更多
文摘目的探讨超级增强子(super enhancers,SE)-HOXC13-AS对胰腺癌生物学行为的影响及临床意义。方法采用qRT-PCR法检测HOXC13-AS在胰腺癌组织和细胞中的表达,分析HOXC13-AS表达与胰腺癌临床病理特征的关系。选择siRNA转染HOXC13-AS表达量最高的PANC-1细胞,应用CCK-8法、细胞周期实验、划痕实验、Transwell实验及细胞凋亡实验检测敲低HOXC13-AS对胰腺癌细胞增殖、迁移、侵袭及凋亡的影响。应用生物数据库分析和JQ1抑制剂验证SE与HOXC13-AS之间调控关系,并通过CCK-8法、划痕实验、Transwell实验及细胞凋亡实验检测抑制SE-HOXC13-AS对胰腺癌细胞增殖、迁移、侵袭及凋亡的影响。结果胰腺癌组织中HOXC13-AS平均表达量(4.40±6.21)显著高于癌旁组织(1.01±0.02,P<0.05),HOXC13-AS表达与胰腺癌分化程度和临床分期密切相关。与正常胰腺导管上皮细胞(0.93±0.11)相比,胰腺癌细胞株BXPC-3(2.55±0.19)、SW1990(5.49±0.92)、CF-PAC1(12.27±0.60)及PANC-1(70.39±6.40)中HOXC13-AS的表达升高(P<0.05)。敲低PANC-1细胞中HOXC13-AS表达可明显抑制胰腺癌细胞增殖、迁移和侵袭能力,促进细胞凋亡。抑制PANC-1细胞中SE可显著下调HOXC13-AS的表达(0.65±0.02 vs 0.41±0.02,P<0.05),并可能进一步抑制胰腺癌细胞增殖、迁移和侵袭能力,促进细胞凋亡。结论HOXC13-AS在胰腺癌中高表达,敲低HOXC13-AS可抑制胰腺癌的进展。SE调控HOXC13-AS的表达,并可能进一步影响胰腺癌的生物学行为。
基金This work was supported by the National Natural Science Foundation of China(41630640)the National Science Foundation of Innovation Research Group(41521002)+1 种基金the National Natural Science Foundation of China(41790445)the National K&D Program(2018YFC1504901,2018YFC1504904).
文摘Loesses are widely distributed all over the world,especially in China.Meanwhile,long-term agricultural irrigation and extreme climate changes have led to frequent geological disasters in the Heifangtai area of Lanzhou,Gansu,China.Of these,landslides are one of the most frequent types of disasters that are harmful to humans and the environment.A landslide is closely related to the lithology,structure,and groundwater of the site and consists of a combination of structure units divided by discontinuities,such as faults,joints,and fi ssures.Therefore,geological surveys,engineering drilling,and trenching are typically used to identify the stratum lithology,structure,and groundwater in order to visually display underground information within a limited depth range.However,these methods have disadvantages.In particular,geological surveys can only describe geological phenomena on the surface,while the cost of drilling and trenching may be high,along with the ineffi ciency of exploration.In this research,the integrated geophysical exploration method was used to analyze the hidden joints,cracks,and other discontinuities and geophysical features of the discontinuities.The results were verified by trench exploration,and large amounts of underground information were obtained,especially the spread and distribution of discontinuities in landslide areas.Such information can be effectively used for carrying out and providing meaningful experiences and lessons in future comprehensive geophysical processing and interpretations related to the prediction and evaluation of landslides.
基金funded by the Science and Technology Innovation Team Plan from Shaanxi Province,China (2014KCT25)projects supported by Cyrus Tang Foundation in Northwest A&F University,Yangling,Shaanxi Province,China
文摘Cuticular wax plays an important role in protecting land plant against biotic and abiotic stresses. Cuticular wax production on plant surface is often visualized by a characteristic glaucous appearance. This study identified quantitative trait loci （QTLs） for wheat （Triticum aestivum L.） flag leaf glaucousness （FLG） using a high-density genetic linkage map developed from a recombinant inbred line （RIL） population derived from the cross HeynexLakin by single-seed descent. The map consisted of 2 068 single nucleotide polymorphism （SNP） markers and 157 simple sequence repeat （SSR） markers on all 21 wheat chromosomes and covered a genetic distance of 2 381.19 cM, with an average marker interval of 1.07 cM. Two additive QTLs for FLG were identified on chromosomes 3AL and 2DS with the increasing FLG allele contributed from Lakin. The major QTL on 3AL, QFIg.hwwgr-3AL, explained 17.5-37.8% of the phenotypic variation in different environments. QFIg.hwwgr-3AL was located in a 4.4-cM interval on chromosome 3AL that was flanked by two markers IWA1831 and IWA8374. Another QTL for FLG on 2DS, designated as QFIg.hwwgr-2DS which was identified only in Yangling in 2014 （YL14）, was flanked by IWA1939 and Xgwm261 and accounted for 11.3% of the phenotypic variation for FLG. QFIg.hww- gr-3AL and QFIg.hwwgr-2DS showed Additive×Environment （AE） interactions, explaining 3.5 and 4.4% of the phenotypic variance, respectively. Our results indicated that different genes/QTLs may contribute different scores of FLG in a cultivar and that the environment may play a role in FLG.
