Pinellia ternata is an important medicinal plant,and its growth and development are easily threatened by high temperature.In this study,comprehensive research on physiological,cytological and transcriptional responses...Pinellia ternata is an important medicinal plant,and its growth and development are easily threatened by high temperature.In this study,comprehensive research on physiological,cytological and transcriptional responses to different levels of heat stress were conducted on a typical phenotype of P.ternata.First,P.ternata exhibited tolerance to the increased temperature,which was supported by normal growing leaves,as well as decreased and sustained photosynthetic parameters.Severe stress aggravated the damages,and P.ternata displayed an obvious leaf senescence phenotype,with significantly increased SOD and POD activities(46%and 213%).In addition,mesophyll cells were seriously damaged,chloroplast thylakoid was fuzzy,grana lamellae and stroma lamellae were obviously broken,and grana thylakoids were stacked,resulting in a dramatically declined photosynthetic rate(74.6%).Moreover,a total of 16808 genes were significantly differential expressed during this process,most of which were involved in photosynthesis,transmembrane transporter activity and plastid metabolism.The number of differentially expressed transcription factors in MYB and bHLH families was the largest,indicating that these genes might participate in heat stress response in P.ternata.These findings provide insight into the response to high temperature and facilitate the standardized cultivation of P.ternata.展开更多
目的检测急性冠脉综合征(acute coronary syndrome,ACS)患者血清长链非编码RNA X染色体失活特异转录物(LncRNA X inactivate-specific transcript,LncRNA XIST)和微小RNA(miR)-330-3p水平,分析二者与心脏自主神经功能的关系。方法选取2...目的检测急性冠脉综合征(acute coronary syndrome,ACS)患者血清长链非编码RNA X染色体失活特异转录物(LncRNA X inactivate-specific transcript,LncRNA XIST)和微小RNA(miR)-330-3p水平,分析二者与心脏自主神经功能的关系。方法选取2020年2月~2021年6月在华北石油管理局总医院诊断为ACS的患者156例,包括不稳定型心绞痛(unstable angina,UA)80例(UA组)和急性心肌梗死(acute myocardial infarction,AMI)76例(AMI组);另选取同期体检健康者100例作为对照组。实时荧光定量PCR法检测受试者血清LncRNA XIST和miR-330-3p水平;24 h动态心电图检测受试者心率变异性(heart rate variability,HRV)时域指标[包括:24 h内正常R-R间期标准差(SDNN)、每5 min R-R间期平均值的标准差(SDANN)、每5 min R-R间期标准差的平均值(SDNN index)、相邻R-R间期之差的均方根(RMSSD)及相邻R-R间期相差>50 ms心搏数占总心搏数的百分比(PNN50)]以及Pearson法分析ACS患者血清LncRNA XIST和miR-330-3p水平与HRV时域指标的相关性。结果与对照组比较,UA组和AMI组血清LncRNA XIST(1.37±0.26,1.69±0.31 vs 1.09±0.22)水平升高(F=113.587,P=0.000),miR-330-3p(0.82±0.15,0.53±0.12 vs 1.03±0.18)及SDANN(115.96±19.57 ms,98.96±16.57 ms vs 133.43±21.01 ms),SDNN(113.84±15.26 ms,101.84±11.22 ms vs 136.41±31.53 ms),SDNN index(54.68±6.72 ms,46.73±5.14 ms vs 64.68±10.64 ms),RMSSD(27.48±5.62 ms,21.37±3.64 ms vs 36.48±8.62 ms)和PNN50(7.58%±2.83%,4.18%±1.13%vs 10.72%±3.21%)水平均降低(F=54.923~225.201,均P=0.000),差异均有统计学意义。与UA组比较,AMI组血清LncRNA XIST水平升高(t=10.792,P<0.05),miR-330-3p及SDANN,SDNN,SDNN index,RMSSD和PNN50水平降低,差异有统计学意义(t=4.743~16.538,均P<0.05);ACS患者血清LncRNA XIST与SDNN index,RMSSD和PNN50呈负相关(r=-0.465,-0.532,-0.542,均P<0.05);miR-330-3p与SDNN index,RMSSD和PNN50呈正相关(r=0.471,0.562,0.561,均P<0.05)。结论ACS患者血清LncRNA XIST水平升高,miR-330-3p水平降低,与心脏自主神经功能有关,可作为防治ACS的重要靶点。展开更多
基金supported by the Scientific and Technological Innovation Project of China Academy of Chinese Medical Sciences(No.CI2021A04106)the Fundamental Research Funds for the Central Public Welfare Research Institutes of China(Nos.ZXKT21026 and ZZ15-YQ-033)the Major Special Project of Scientific and Technological Cooperation of Bijie City(2021-02).
文摘Pinellia ternata is an important medicinal plant,and its growth and development are easily threatened by high temperature.In this study,comprehensive research on physiological,cytological and transcriptional responses to different levels of heat stress were conducted on a typical phenotype of P.ternata.First,P.ternata exhibited tolerance to the increased temperature,which was supported by normal growing leaves,as well as decreased and sustained photosynthetic parameters.Severe stress aggravated the damages,and P.ternata displayed an obvious leaf senescence phenotype,with significantly increased SOD and POD activities(46%and 213%).In addition,mesophyll cells were seriously damaged,chloroplast thylakoid was fuzzy,grana lamellae and stroma lamellae were obviously broken,and grana thylakoids were stacked,resulting in a dramatically declined photosynthetic rate(74.6%).Moreover,a total of 16808 genes were significantly differential expressed during this process,most of which were involved in photosynthesis,transmembrane transporter activity and plastid metabolism.The number of differentially expressed transcription factors in MYB and bHLH families was the largest,indicating that these genes might participate in heat stress response in P.ternata.These findings provide insight into the response to high temperature and facilitate the standardized cultivation of P.ternata.
文摘目的检测急性冠脉综合征(acute coronary syndrome,ACS)患者血清长链非编码RNA X染色体失活特异转录物(LncRNA X inactivate-specific transcript,LncRNA XIST)和微小RNA(miR)-330-3p水平,分析二者与心脏自主神经功能的关系。方法选取2020年2月~2021年6月在华北石油管理局总医院诊断为ACS的患者156例,包括不稳定型心绞痛(unstable angina,UA)80例(UA组)和急性心肌梗死(acute myocardial infarction,AMI)76例(AMI组);另选取同期体检健康者100例作为对照组。实时荧光定量PCR法检测受试者血清LncRNA XIST和miR-330-3p水平;24 h动态心电图检测受试者心率变异性(heart rate variability,HRV)时域指标[包括:24 h内正常R-R间期标准差(SDNN)、每5 min R-R间期平均值的标准差(SDANN)、每5 min R-R间期标准差的平均值(SDNN index)、相邻R-R间期之差的均方根(RMSSD)及相邻R-R间期相差>50 ms心搏数占总心搏数的百分比(PNN50)]以及Pearson法分析ACS患者血清LncRNA XIST和miR-330-3p水平与HRV时域指标的相关性。结果与对照组比较,UA组和AMI组血清LncRNA XIST(1.37±0.26,1.69±0.31 vs 1.09±0.22)水平升高(F=113.587,P=0.000),miR-330-3p(0.82±0.15,0.53±0.12 vs 1.03±0.18)及SDANN(115.96±19.57 ms,98.96±16.57 ms vs 133.43±21.01 ms),SDNN(113.84±15.26 ms,101.84±11.22 ms vs 136.41±31.53 ms),SDNN index(54.68±6.72 ms,46.73±5.14 ms vs 64.68±10.64 ms),RMSSD(27.48±5.62 ms,21.37±3.64 ms vs 36.48±8.62 ms)和PNN50(7.58%±2.83%,4.18%±1.13%vs 10.72%±3.21%)水平均降低(F=54.923~225.201,均P=0.000),差异均有统计学意义。与UA组比较,AMI组血清LncRNA XIST水平升高(t=10.792,P<0.05),miR-330-3p及SDANN,SDNN,SDNN index,RMSSD和PNN50水平降低,差异有统计学意义(t=4.743~16.538,均P<0.05);ACS患者血清LncRNA XIST与SDNN index,RMSSD和PNN50呈负相关(r=-0.465,-0.532,-0.542,均P<0.05);miR-330-3p与SDNN index,RMSSD和PNN50呈正相关(r=0.471,0.562,0.561,均P<0.05)。结论ACS患者血清LncRNA XIST水平升高,miR-330-3p水平降低,与心脏自主神经功能有关,可作为防治ACS的重要靶点。
