数据要素市场建设水平、影响因素与实践路径研究

建设数据要素市场是推进数字经济高质量发展的重要议题,然而目前数据要素市场的影响因素及构建路径的研究还不够深入。研究从供给、流通和价值三个维度构建指标,并对全国31个省级行政区的数据要素市场建设水平进行测度。基于TOE框架,采用模糊集定性比较分析法(fs QCA)探究数据要素市场的影响因素,并结合实践归纳出高水平数据要素市场的三种构建路径。研究有助于深化对我国数据要素市场建设多元驱动路径的认识,为因地制宜、因时制宜建设数据要素市场提供理论指导和实践启示。

三七和PDTC对创伤性脑损伤大鼠自噬机制的干预作用

目的探讨三七和吡咯醛二硫氨基甲酸酯(PDTC)对创伤性脑损伤(TBI)大鼠自噬机制的干预作用。方法将36只SD成年雄性大鼠按随机数字表法分为假手术组(SHAM组)、模型组(M组)、三七组(PN组)、NF-κB抑制剂PDTC组(PDCT组)、三七+PDTC组(PN+PDCT组)、三七+氯喹组(PN+CHQ组),每组6只。SHAM组大鼠进行手术及麻醉,但无冲击损伤过程,其余各组均采用改良的Feeney自由落体模型制备法建立TBI模型。6组大鼠术前3 d、术后3 d予0.9%氯化钠注射液1 ml每天分2次灌胃,术前1 d、术后3d予0.9%氯化钠注射液1 m1腹腔注射,1次/d。PN组灌胃时加入三七粉2.5 g/kg。PDTC组腹腔注射时加入PDTC 120 mg/kg。PN+PDTC组灌胃时加入三七粉2.5 g/kg,腹腔注射时加入PDTC 120 mg/kg。PN+CHQ组灌胃时加入三七粉2.5 g/kg,腹腔注射时加入氯喹60 mg/kg。术后第4天乙醚麻醉处死,取大脑组织进行检测。观察各组大鼠造模后12、24、72 h神经功能缺陷评分,大鼠脑组织HE染色、Nis sl染色观察脑组织损伤情况,透射电镜观察细胞自噬体,Wes tern blot检测各组大鼠脑组织泛素结合蛋白p62、Beclinl和微管相关蛋白轻链3(LC3)表达。结果M组大鼠各时间点神经功能缺陷评分明显下降,HE染色和Nissl染色脑组织损伤明显,透射电镜下脑细胞中可见大量自噬体,自噬蛋白明显升高(P<0.05或0.01)。PN组、PDTC组、PN+PDTC组、PN+CHQ组均能改善72 h神经功能缺陷评分,同时HE染色和Nissl染色脑组织损伤较M组改善,透射电镜下脑细胞中可见自噬体较M组减少,p62、Beclinl和LC3较M组均明显下降(P<0.05或0.01)。PN组、PDTC组、PN+PDTC组、PN+CHQ组组间比较差异均无统计学意义(均P>0.05)。结论TBI大鼠存在自噬并伴有脑功能损伤,三七以及PDTC均能干预TBI大鼠自噬过程,促进脑功能恢复,三七与PDTC以及三七与氯喹并无明显协同作用。

Blood circulation activating effect of Sanqi(Radix Notoginseng) on venous thromboembolism rats

OBJECTIVE:To explore the blood circulation activating effect and mechanism of Sanqi(Radix Notoginseng)in vivo,using a venous thromboembolism(VTE)rat model.METHODS:We established the VTE rat model,and then intervened with low molecular weight hepa-rin(LMWH),as well as low,medium and high doses of Sanqi(Radix Notoginseng),to observe the blood circulation activating effect of Sanqi(Radix Notoginseng)on VTE rats.RESULTS:After the treatment with high concentrations of Sanqi(Radix Notoginseng),the pulmonary thromboembolism was alleviated,and the lower limb thrombosis was markedly improved.Moreover,the expression quantities of plasma activated partial thromboplastin time,prothrombin time and D-dimer,as well as endothelin,von Willebrand factor,and plasminogen activator inhibitor-1 in thrombosis segment tissues were markedly down-regulated;while those of nitric oxide and tissue-type plasminogen activator were up-regulated.After low and medium concentration Sanqi(Radix Notoginseng)treatment,no obvious improvement was observed in each index.Moreover,the high concentration Sanqi(Radix Notoginseng)showed comparable efficacy to the positive drug LMWH.CONCLUSION:This data suggests that high concentration of Sanqi(Radix Notoginseng)is effective in preventing and treating VTE.

Efficacy of Sanqi(Radix Notoginseng)in treating cerebral hemorrhage in rats with traumatic brain injury

OBJECTIVE:To evaluate the protective efficacy of Sanqi(Radix Notoginseng)on cerebral hemorrhage in a rat model of traumatic brain injury(TBI)by investigating plasminogen activator inhibitor-1(PAI-1),tissue-type plasminogen activator(t-PA),nuclear factor-κB(NF-κB,p-p65),nitric oxide(NO),endothelin(ET),cluster differentiation(CD61CD62),and coagulation.METHODS:The free-fall method was used to create a rat model of TBI.Forty-eight rats were randomly divided into six groups:the blank group,sham group,model group,low-dose Sanqi(Radix Notoginseng)group,middle-dose Sanqi(Radix Notoginseng)group,and high-dose Sanqi(Radix Notoginseng)group.At 24 h after the model was created,we investigated brain MRI,brain tissue morphology using HE staining,flow cytometry,and immunohistochemical changes.RESULTS:Cerebral hemorrhage was aggravated in TBI rats(observed in brain specimens,brain MRI,and brain tissue HE).Cerebral immunohistochemistry results demonstrated that the expression of t-PA,PAI-1 and p-p65 increased significantly in TBI rats,while t-PA/PAI-1 had a significant decrease.In addition,CD61CD62,D2D,and ET were significantly increased in TBI rats,and PT and APTT were significantly prolonged;in contrast,NO was significantly decreased.Sanqi(Radix Notoginseng)decreased cerebral hemorrhage in TBI rats(observed in brain MRI and brain tissue HE),and increased t-PA/PAI-1,CD61CD62 significantly.It also significantly decreased the expression of t-PA,PAI-1,and p-p65 in brain immunohistochemistry and significantly decreased PT,APTT,D2D,and ET.However,there were no differences in NO between the model group and the Sanqi(Radix Notoginseng)group.CONCLUSION:Sanqi(Radix Notoginseng)can decrease the expression of p-p65,increase t-PA/PAI-1,and stem traumatic intracranial hemorrhage in a TBI rat model.