赤芝FPS基因酵母单杂交文库构建及其上游转录因子的筛选

目的筛选赤芝三萜合成途径中法尼基焦磷酸合酶(farnesyl diphosphate synthase,FPS)基因的上游调控转录因子。方法首先克隆了FPS基因启动子,并连接至pAbAi质粒构建诱饵载体pAbAi-FPS。将pAbAi-FPS转化Y1H酵母感受态细胞构建诱饵菌。采用SMART技术构建赤芝酵母单杂交cDNA文库,再将纯化的双链cDNA、pGADT7-Rec共转化诱饵菌株,筛选FPS上游的转录调控因子。结果构建了含pAbAi-FPS的诱饵载体并筛选出诱饵菌株,构建了cDNA文库并转化诱饵菌株,筛选出阳性克隆37个,得到作用FPS基因上游的转录调控因子18个,包括转录因子3个、核糖体蛋白5个及其他家族蛋白10个。结论筛选出转录因子GlSNF2、GlMHR和GlZn2Cys6为调控FPS表达的候选基因,为深入研究FPS基因的表达调控机制奠定了研究基础。     

基于文献分析和分子对接法探讨化橘红防治新型冠状病毒肺炎（COVID-19）的前景

目的探讨化橘红防治新型冠状病毒肺炎(COVID-19)的前景,为化橘红的临床应用提供依据。方法通过文献查阅,对化橘红及其主要化学成分在祛痰、抗急性肺损伤、抗炎、抗肺纤维化、镇咳、抗氧化、抗肝损伤和抗肾损伤等方面的药理作用进行分析,并通过中药系统药理学平台(TCMSP)和查阅文献检索化橘红的化学成分,将各化学成分与血管紧张素转化酶Ⅱ(ACE2)、3CL水解酶(Mpro)、木瓜样蛋白酶(PLP)和树突状细胞特异性细胞间黏附分子-3结合非整合素因子(DC-SIGN)进行分子对接,预测其在抑制新型冠状病毒(SARS-Co V-2)病毒感染和复制方面的潜在活性。结果文献分析结果表明,化橘红及其主要化学成分具有祛痰、抗急性肺损伤、抗炎、抗肺纤维化、镇咳、抗氧化、抗肝损伤和抗肾损伤等多方面药理活性;分子对接结果表明,柚皮苷(naringin)、新橙皮苷(neohesperdin)、野漆树苷(rhoifolin)、枸橘苷(poncirin)和西托糖苷(sitogluside)与ACE2、MPro、PLP和DC-SIGN均具有较强的结合力,具有抑制SARS-CoV-2病毒感染宿主细胞和自我复制的潜在活性。结论化橘红既具有通过多种药理活性改善COVID-19病程进程的潜力,又可能通过作用于ACE2、MPro、PLP和DC-SIGN发挥抑制病毒感染宿主细胞及自我复制的作用。提示化橘红可能对COVID-19的防治具有积极作用。     

Liver Transplantation Following Life-threatening Abdominal Trauma: A Case Series of 5 Patients at a Single Institution

Managing traumatic liver injury (TLI) is always challenging and demands precise clinical judgment. Currently, treatment of TLI in most circumstances is non-operative; however, surgical therapy might be required for severe TLI, particularly those that result in extensive blood loss. In the current institutional study carried out from June 1995 to April 2017, we describe our experience with 5 patients who received an orthotopic liver transplant for severe TLI. One patient passed away postoperatively from cerebral edema; 1 patient died of renal failure 4 years after the liver transplantation, and 3 patients are still alive. Based on our experience, we conclude that in patients with TLI, especially those with uncontrollable bleeding or those who develop liver failure, liver transplantation should be taken into consideration.