目的探讨肉桂醛在高血糖诱导的心肌纤维化进程中的保护作用以及可能的调控信号通路等机制。方法高糖饲养持续喂养乳鼠12周并肉桂醛处理心肌纤维化细胞48小时(对照组无肉桂醛处理),麻醉处死乳鼠取出心脏,并进行病理包埋切片、HE染色,CCK...目的探讨肉桂醛在高血糖诱导的心肌纤维化进程中的保护作用以及可能的调控信号通路等机制。方法高糖饲养持续喂养乳鼠12周并肉桂醛处理心肌纤维化细胞48小时(对照组无肉桂醛处理),麻醉处死乳鼠取出心脏,并进行病理包埋切片、HE染色,CCK8法检测细胞的增殖情况;分离乳鼠心肌成纤维细胞,分别在含5.6 m M正常葡糖糖和25 m M高葡萄糖培养基培养24h后,用流式Annexin-FITC/PI双染法检测细胞凋亡;设计miR-1252特异性引物,运用q PCR检测其在各组处理心肌成纤维细胞的表达水平。结果低糖培养条件下,心肌细胞排列整齐,结构完整;高糖培养破坏细胞形态,结构组织紊乱;流式Annexin-FITC/PI双染法检测细胞凋亡,发现高糖能显著诱导心肌成纤维细胞的凋亡,而CA能抑制心肌成纤维细胞的凋亡。miR-1252在高糖诱导的心肌成纤维细胞的表达水平要显著低于正常组和CA组。结论肉桂醛可以改善高糖毒性对乳鼠心肌细胞的损伤,抑制心肌成纤维细胞的凋亡,可能是通过刺激miR-1252的表达的机制改善心肌纤维化。展开更多
Background Low diastolic blood pressure(DBP)was reported to be associated with reduced coronary blood flow,subclinical myocardial damage,and cardiovascular events. The aim of this study was to explore the impact of lo...Background Low diastolic blood pressure(DBP)was reported to be associated with reduced coronary blood flow,subclinical myocardial damage,and cardiovascular events. The aim of this study was to explore the impact of low DBP on clinical outcomes in patients with ST-elevation myocardial infarction(STEMI)undergoing percutaneous coronary intervention(PCI). Methods A total of 1232 patients with STEMI were retrospectively enrolled and divided into two groups according to admission DBP level:≥70 mm Hg(n=817)and < 70 mm Hg(n=415). The relationship between DBP and in-hospital and 1-year adverse events was evaluated.Results In-hospital death occurred in 2.4% of patients. The in-hospital mortality(5.3% vs. 1.0%,P<0.001)and major adverse clinical events(11.1% vs. 7.5%,P=0.033)were significantly higher in patients with a low DBP.DBP <70 mm Hg was associated with in-hospital death(adjusted odds rate=3.31,95%CI:1.36-8.07,P=0.009).Additional significant indicators included eGFR < 60 mL/min/1.73 m^2 and intra aorta balloon pump(IABP)treatment. Seventy-seven(6.3%)patients died in the one-year follow-up. DBP < 70 mm Hg was associated with increased risk of 1-year death(8.9% vs. 4.8%,Log-rank=9.9,P=0.002). Conclusion Low DBP was associated with increased risk of in-hospital and 1-year adverse prognosis in patients with STEMI undergoing PCI,which could be a tool for risk assessment.展开更多
文摘目的探讨肉桂醛在高血糖诱导的心肌纤维化进程中的保护作用以及可能的调控信号通路等机制。方法高糖饲养持续喂养乳鼠12周并肉桂醛处理心肌纤维化细胞48小时(对照组无肉桂醛处理),麻醉处死乳鼠取出心脏,并进行病理包埋切片、HE染色,CCK8法检测细胞的增殖情况;分离乳鼠心肌成纤维细胞,分别在含5.6 m M正常葡糖糖和25 m M高葡萄糖培养基培养24h后,用流式Annexin-FITC/PI双染法检测细胞凋亡;设计miR-1252特异性引物,运用q PCR检测其在各组处理心肌成纤维细胞的表达水平。结果低糖培养条件下,心肌细胞排列整齐,结构完整;高糖培养破坏细胞形态,结构组织紊乱;流式Annexin-FITC/PI双染法检测细胞凋亡,发现高糖能显著诱导心肌成纤维细胞的凋亡,而CA能抑制心肌成纤维细胞的凋亡。miR-1252在高糖诱导的心肌成纤维细胞的表达水平要显著低于正常组和CA组。结论肉桂醛可以改善高糖毒性对乳鼠心肌细胞的损伤,抑制心肌成纤维细胞的凋亡,可能是通过刺激miR-1252的表达的机制改善心肌纤维化。
基金supported by Shenzhen Science and Technology Innovation Commission(No.JCYJ20180302150203732).
文摘Background Low diastolic blood pressure(DBP)was reported to be associated with reduced coronary blood flow,subclinical myocardial damage,and cardiovascular events. The aim of this study was to explore the impact of low DBP on clinical outcomes in patients with ST-elevation myocardial infarction(STEMI)undergoing percutaneous coronary intervention(PCI). Methods A total of 1232 patients with STEMI were retrospectively enrolled and divided into two groups according to admission DBP level:≥70 mm Hg(n=817)and < 70 mm Hg(n=415). The relationship between DBP and in-hospital and 1-year adverse events was evaluated.Results In-hospital death occurred in 2.4% of patients. The in-hospital mortality(5.3% vs. 1.0%,P<0.001)and major adverse clinical events(11.1% vs. 7.5%,P=0.033)were significantly higher in patients with a low DBP.DBP <70 mm Hg was associated with in-hospital death(adjusted odds rate=3.31,95%CI:1.36-8.07,P=0.009).Additional significant indicators included eGFR < 60 mL/min/1.73 m^2 and intra aorta balloon pump(IABP)treatment. Seventy-seven(6.3%)patients died in the one-year follow-up. DBP < 70 mm Hg was associated with increased risk of 1-year death(8.9% vs. 4.8%,Log-rank=9.9,P=0.002). Conclusion Low DBP was associated with increased risk of in-hospital and 1-year adverse prognosis in patients with STEMI undergoing PCI,which could be a tool for risk assessment.
