[Effect of polysaccharides from seeds of Vaccaria segetalis in alleviating urinary tract infection induced bladder injury by inhibiting NLRP3 inflammasome].

To study the mechanism of polysaccharides from seeds of Vaccaria segetalis( PSV) in the treatment of bacterial cystitis through the NLRP3 inflammasome pathway. The rat model of urinary tract infection was used and treated with PSV,and the urine and bladders were collected. The level of interleukin-10( IL-10) in rat urine was detected by enzyme linked immunosorbent assay( ELISA). Western blot and immunofluorescence staining were used to detect the expressions of sonic hedgehog( SHH) and NLRP3 inflammasome [NOD-like receptor thermoprotein domain 3( NLRP3),apoptosis associated speck like protein( ASC) and pro-caspase-1]. The expression of Toll-like receptor pathway was detected by RT-PCR. The death of 5637 cells induced by uropathogenic Escherichia coli( UPEC) and lactate dehydrogenase( LDH) release were evaluated using live/dead staining. The results showed that in the rat bladder,the expressions of SHH,NLRP3 inflammasomes and Toll-like receptors were significantly up-regulated,and NLRP3 inflammasomes were significantly activated by UPEC infection. The administration with PSV could significantly increase the concentration of IL-10 in urine,inhibit the expressions of SHH,NLRP3 inflammasomes and Toll-like receptors in bladder,and inhibit the activation of NLRP3 inflammasomes. A large number of 5637 cells were dead after UPEC infection and caused LDH production. PSV could significantly inhibit the death of 5637 cells and the release of LDH. In conclusion,PSV could inhibit the expression and activation of NLRP3 inflammasomes by inhibiting the Toll-like receptor pathway,thereby mitigating the bladder injury.

[Meta-analysis on effectiveness and safety of Pudilan Xiaoyan Oral Liquid on child upper respiratory infection].

To systematically review the effectiveness and safety of Pudilan Xiaoyan Oral Liquid on child upper respiratory infection and conduct Meta-analysis. We electronically retrieved databases, including PubMed, Web of Science, VIP, WanFang and CNKI, for published articles of randomized controlled trials(RCTs) of Pudilan Xiaoyan Oral Liquid on child upper respiratory infection from inception to April 2019. According to the inclusion and exclusion criteria, two reviewers independently screened out literatures, extracted data and assessed the risk of bias in included studies. Then, Meta-analysis were conducted by Stata 15.0 software. A total of 16 RCTs involving 1 924 patients with upper respiratory infection were included. The results of Meta-analysis showed that the improvement of clinical symptoms, such as fever subsided time(WMD=-3.66, 95%CI[-4.61,-2.72], P<0.001), cough time(WMD=-1.89, 95%CI[-2.51,-1.27], P<0.001), time of runny noses(WMD=-4.60, 95%CI[-5.85,-3.34], P<0.001) and time of sore throat(WMD=-2.62, 95%CI[-3.54,-1.70], P<0.001). Meanwhile, the results of Meta-analysis showed the improvement of laboratory indications, including TNF-α(WMD=-2.68, 95%CI[-2.98,-1.58], P<0.001) and IL-6(WMD=-2.26, 95%CI[-3.36,-2.36], P<0.01). The current evidence shows that Pudilan Xiaoyan Oral Liquid may significantly improve the effectiveness and safety. According to the limited quality of included studies, the above conclusion needs be to verified with more high-quality studies.

[The cytology mechanism of anti-parainfluenza virus infection of total flavone of Scutellaria barbata].

In order to research into the cytology mechanism of anti-virus action of total flavone of Scutellaria barbata (TFSB), the effects of TFSB on host cells membrane potential, Na(+)-K(+)-ATPase activity and membrane fluidity after parainfluenza virus type1 (PIV-1) infection were studied. The changes of membrane potential which was fluorescent labeled with DiBAC4(3) and its changes were measured by flow cytometer. Phosphorus determination method and spectrophotometry were used to measure the Na(+)-K(+)-ATPase activity of Hep-2 cells membrane after PIV-1 infection. Hep-2 cells membrane phospholipids were fluorescent labeled with NBD-C6-HPC and membrane fluidity was measured by confocal scanning laser microscope. The result demonstrated that post PIV-1 infection membrane potential decreased significantly and the membrane was in a state of hyperpolarization, Na(+)-K(+)-ATPase activity increased significantly and membrane fluidity decreased significantly. There was no apparent interfere effect of TFSB on the changes of membrane potential and Na(+)-K(+)-ATPase activity after PIV-1 infection, while membrane fluidity improved significantly. It was indicated that the cytology mechanism of PIV-1 infection might be related to membrane hyperpolarization, Na(+)-K(+)-ATPase activity increase and membrane fluidity decrease. TFSB can improve membrane fluidity and prevent the infection by protecting the cell membrane. But it is possible that the anti-PIV-1 mechanisms of TFSB had nothing to do with membrane potential and Na(+)-K(+)-ATPase activity.