目的探讨血清微小RNA(miRNA)-106a和miRNA-20a水平与新生儿呼吸窘迫综合征(NRDS)严重程度及预后的相关性。方法选取2021年3月至2024年4月在西安交通大学附属红会医院就诊的156例NRDS患儿为NRDS组,其中男77例,女79例,出生胎龄(33.87±...目的探讨血清微小RNA(miRNA)-106a和miRNA-20a水平与新生儿呼吸窘迫综合征(NRDS)严重程度及预后的相关性。方法选取2021年3月至2024年4月在西安交通大学附属红会医院就诊的156例NRDS患儿为NRDS组,其中男77例,女79例,出生胎龄(33.87±2.01)周。根据NRDS患儿胸部影像检查结果将其分为轻度组(50例)、中度组(74例)和重度组(32例)。根据NRDS患儿结局将其分为预后良好组132例和预后不良组24例。另选取同期在西安交通大学附属红会医院体检的健康早产儿150例作为对照组,其中男77例,女73例,出生胎龄(34.05±1.83)周。采用定量聚合酶链式反应(qPCR)测定血清miRNA-106a和miRNA-20a水平;采用Pearson相关分析NRDS患儿血清miRNA-106a和miRNA-20a水平与新生儿急性生理评分(SNAPPE-Ⅱ)、1 min Apgar评分的相关性;采用受试者操作特征曲线(ROC)评价血清miRNA-106a和miRNA-20a水平预测NRDS患儿预后的价值。采用t检验、χ^(2)检验。结果NRDS组患儿血清miRNA-106a和miRNA-20a水平低于对照组[(0.97±0.30)比(1.70±0.53)、(0.88±0.32)比(1.57±0.55)],差异均有统计学意义(t=14.750、13.346,均P<0.05)。重度组、中度组、轻度组血清miRNA-106a和miRNA-20a水平及1 min Apgar评分比较,差异均有统计学意义(均P<0.05)。预后不良组NRDS患儿血清miRNA-106a和miRNA-20a水平低于预后良好组[(0.40±0.19)比(1.07±0.36)、(0.39±0.17)比(0.97±0.34)],SNAPPE-Ⅱ评分高于预后良好组[(34.25±6.50)分比(18.10±3.58)分],差异均有统计学意义(t=13.438、12.718、11.850,均P<0.05)。血清miRNA-106a和miRNA-20a水平与SNAPPE-Ⅱ评分呈负相关(均P<0.05),与1 min Apgar评分呈正相关(均P<0.05)。miRNA-106a、miRNA-20a预测NRDS患儿预后不良的灵敏度分别为95.8%、91.7%,特异度分别为93.2%、89.4%,曲线下面积(AUC)分别为0.961(95%CI 0.929~0.992)、0.938(95%CI 0.900~0.976),表明这些生物标志物预测NRDS患儿预后准确度较高。miRNA-106a联合miRNA-20a的灵敏度和特异度分别为91.7%、97.7%,AUC为0.984(95%CI 0.967~1.000),表明联合检测具有更高的预测效能。结论血清miRNA-106a和miRNA-20a水平在NRDS患儿中降低,且其水平随NRDS患儿严重程度加重而逐渐降低,二者在预测NRDS患儿预后中具有重要价值。展开更多
Background:Myocardial infarction(MI)is an acute condition in which the heart mus-cle dies due to the lack of blood supply.Previous research has suggested that au-tophagy and angiogenesis play vital roles in the preven...Background:Myocardial infarction(MI)is an acute condition in which the heart mus-cle dies due to the lack of blood supply.Previous research has suggested that au-tophagy and angiogenesis play vital roles in the prevention of heart failure after MI,and miR-106a is considered to be an important regulatory factor in MI.But the specific mechanism remains unknown.In this study,using cultured venous endothelial cells and a rat model of MI,we aimed to identify the potential target genes of miR-106a and discover the mechanisms of inhibiting autophagy and angiogenesis.Methods:We first explored the biological functions of miR-106a on autophagy and angiogenesis on endothelial cells.Then we identified ATG7,which was the down-stream target gene of miR-106a.The expression of miR-106a and ATG7 was investi-gated in the rat model of MI.Results:We found that miR-106a inhibits the proliferation,cell cycle,autophagy and angiogenesis,but promoted the apoptosis of vein endothelial cells.Moreover,ATG7 was identified as the target of miR-106a,and ATG7 rescued the inhibition of autophagy and angiogenesis by miR-106a.The expression of miR-106a in the rat model of MI was decreased but the expression of ATG7 was increased in the infarction areas.Conclusion:Our results indicate that miR-106a may inhibit autophagy and angiogenesis by targeting ATG7.This mechanism may be a potential therapeutic treatment for MI.展开更多
Improving structures involves comparing old and new designs on a key parameter.Calculating the percent change in performance is a method to assess.This paper proposes a cost-effective analogy by generating replicas of...Improving structures involves comparing old and new designs on a key parameter.Calculating the percent change in performance is a method to assess.This paper proposes a cost-effective analogy by generating replicas of additive manufactured aluminum alloy(Al Si10Mg)body-centered cubic lattice(BCC)based turbine blade(T106C)with the same in poly-lactic acid(PLA)material and their comparison in the context of percent change for natural frequencies.Initially,a cavity is created inside the turbine blade(hollow blade).Natural frequencies are obtained experimentally and numerically by incorporating BCC at 50%and 80%of the cavity length into the hollow blade for both materials.The cost of manufacturing the metal blades is 90%more than that of the PLA blades.The two material blade designs show a similar percentage variation,as the first-order mode enhancs more than 5%and the second-order mode more than 4%.To observe the behavior in another material,both blades are analyzed numerically with a nickel-based U-500 material,and the same result is achieved,describing that percent change between designs can be verified using the PLA material.展开更多
文摘目的探讨血清微小RNA(miRNA)-106a和miRNA-20a水平与新生儿呼吸窘迫综合征(NRDS)严重程度及预后的相关性。方法选取2021年3月至2024年4月在西安交通大学附属红会医院就诊的156例NRDS患儿为NRDS组,其中男77例,女79例,出生胎龄(33.87±2.01)周。根据NRDS患儿胸部影像检查结果将其分为轻度组(50例)、中度组(74例)和重度组(32例)。根据NRDS患儿结局将其分为预后良好组132例和预后不良组24例。另选取同期在西安交通大学附属红会医院体检的健康早产儿150例作为对照组,其中男77例,女73例,出生胎龄(34.05±1.83)周。采用定量聚合酶链式反应(qPCR)测定血清miRNA-106a和miRNA-20a水平;采用Pearson相关分析NRDS患儿血清miRNA-106a和miRNA-20a水平与新生儿急性生理评分(SNAPPE-Ⅱ)、1 min Apgar评分的相关性;采用受试者操作特征曲线(ROC)评价血清miRNA-106a和miRNA-20a水平预测NRDS患儿预后的价值。采用t检验、χ^(2)检验。结果NRDS组患儿血清miRNA-106a和miRNA-20a水平低于对照组[(0.97±0.30)比(1.70±0.53)、(0.88±0.32)比(1.57±0.55)],差异均有统计学意义(t=14.750、13.346,均P<0.05)。重度组、中度组、轻度组血清miRNA-106a和miRNA-20a水平及1 min Apgar评分比较,差异均有统计学意义(均P<0.05)。预后不良组NRDS患儿血清miRNA-106a和miRNA-20a水平低于预后良好组[(0.40±0.19)比(1.07±0.36)、(0.39±0.17)比(0.97±0.34)],SNAPPE-Ⅱ评分高于预后良好组[(34.25±6.50)分比(18.10±3.58)分],差异均有统计学意义(t=13.438、12.718、11.850,均P<0.05)。血清miRNA-106a和miRNA-20a水平与SNAPPE-Ⅱ评分呈负相关(均P<0.05),与1 min Apgar评分呈正相关(均P<0.05)。miRNA-106a、miRNA-20a预测NRDS患儿预后不良的灵敏度分别为95.8%、91.7%,特异度分别为93.2%、89.4%,曲线下面积(AUC)分别为0.961(95%CI 0.929~0.992)、0.938(95%CI 0.900~0.976),表明这些生物标志物预测NRDS患儿预后准确度较高。miRNA-106a联合miRNA-20a的灵敏度和特异度分别为91.7%、97.7%,AUC为0.984(95%CI 0.967~1.000),表明联合检测具有更高的预测效能。结论血清miRNA-106a和miRNA-20a水平在NRDS患儿中降低,且其水平随NRDS患儿严重程度加重而逐渐降低,二者在预测NRDS患儿预后中具有重要价值。
基金National Natural Science Foundation of China,Grant/Award Number:32070542Guangdong Basic and Applied Basic Research Foundation,Grant/Award Number:2021A1515010873 and 2022A1515011455+1 种基金Breed Industry Innovation Park of Guangdong Xiaoerhua Pig,Grant/Award Number:2022-4408X1-43010402-0019Hainan Provincial Natural Science Foundation,Grant/Award Number:818MS132。
文摘Background:Myocardial infarction(MI)is an acute condition in which the heart mus-cle dies due to the lack of blood supply.Previous research has suggested that au-tophagy and angiogenesis play vital roles in the prevention of heart failure after MI,and miR-106a is considered to be an important regulatory factor in MI.But the specific mechanism remains unknown.In this study,using cultured venous endothelial cells and a rat model of MI,we aimed to identify the potential target genes of miR-106a and discover the mechanisms of inhibiting autophagy and angiogenesis.Methods:We first explored the biological functions of miR-106a on autophagy and angiogenesis on endothelial cells.Then we identified ATG7,which was the down-stream target gene of miR-106a.The expression of miR-106a and ATG7 was investi-gated in the rat model of MI.Results:We found that miR-106a inhibits the proliferation,cell cycle,autophagy and angiogenesis,but promoted the apoptosis of vein endothelial cells.Moreover,ATG7 was identified as the target of miR-106a,and ATG7 rescued the inhibition of autophagy and angiogenesis by miR-106a.The expression of miR-106a in the rat model of MI was decreased but the expression of ATG7 was increased in the infarction areas.Conclusion:Our results indicate that miR-106a may inhibit autophagy and angiogenesis by targeting ATG7.This mechanism may be a potential therapeutic treatment for MI.
基金supported by the National Natural Science Foundation of China(No.12111540251)。
文摘Improving structures involves comparing old and new designs on a key parameter.Calculating the percent change in performance is a method to assess.This paper proposes a cost-effective analogy by generating replicas of additive manufactured aluminum alloy(Al Si10Mg)body-centered cubic lattice(BCC)based turbine blade(T106C)with the same in poly-lactic acid(PLA)material and their comparison in the context of percent change for natural frequencies.Initially,a cavity is created inside the turbine blade(hollow blade).Natural frequencies are obtained experimentally and numerically by incorporating BCC at 50%and 80%of the cavity length into the hollow blade for both materials.The cost of manufacturing the metal blades is 90%more than that of the PLA blades.The two material blade designs show a similar percentage variation,as the first-order mode enhancs more than 5%and the second-order mode more than 4%.To observe the behavior in another material,both blades are analyzed numerically with a nickel-based U-500 material,and the same result is achieved,describing that percent change between designs can be verified using the PLA material.
