Objective:To investigate the effect of type 2 taste receptor(T2R)38 activation on ferroptosis of human airway epithelium NuLi-1 cells induced by cigarette smoke exposure,and to clarify its possible mechanism.Methods:The human airway epithelial NuLi-1 cells were divided into control group(without any treatment),cigarette smoke extract(CSE)group(treated with 5％CSE for 24 h)and CSE+T2R38 specific agonist phenylthiocarbamide(PTC)group(CSE+PTC group)(treated with 5％CSE and 1 mmol·L-1 PTC for 24 h).The expression levels of T2R38 mRNA and protein in NuLi-1 cells in various groups were determined by real-time fluorescence quantitative PCR(RT-qPCR)and Western blotting methods.The cell viabilities in various groups were determined by cell counting kit-8(CCK-8)assay.The activities of inducible nitric oxide synthase(iNOS),endothelial nitric oxide synthase(eNOS),and superoxide dismutase(SOD)in the cells in various groups were measured by kits.DAX-J2 red fluorescence probe was used to determine the levels of nitric oxide(NO)in the cells in various groups.The reactive oxygen species(ROS)levels in the cells in various groups were detected by fluorescent probe kit.The levels of malondialdehyde(MDA),Fe2+,and reduced glutathione(GSH)in the cells in various groups were determined by enzyme-linked immunosorbent assay(ELISA)method.Western blotting method was used to determine the expression levels of nuclear factor erythroid 2-related factor 2(Nrf2)and glutathione peroxidases 4(GPx4)proteins in the cells in various groups.Results:Compared with control group,the expression levels of T2R38 mRNA and protein in NuLi-1 cells in CSE group were increased(P＜0.05).Compared with control group,the viability of NuLi-1 cells in CSE group was decreased(P＜0.05),the activities of iNOS and SOD in cells in CSE group were increased(P＜0.05),the levels of NO and ROS were increased(P＜0.05),the levels of MDA and Fe2+were increased(P＜0.05),and the GSH level and the expression levels of Nrf2 and GPx4 proteins were decreased.Compared with CSE group,the viability of NuLi-1 cells in CSE+PTC group was increased(P＜0.05),the activity of SOD and the GSH level in the cells were increased(P＜0.05),the activity of iNOS in cells was decreased(P＜0.05),the levels of NO and ROS in cells were decreased(P＜0.05),the levels of MDA and Fe2+were decreased(P＜0.05),and the expression levels of Nrf2 and GPx4 proteins were increased(P＜0.05).There was no significant difference in eNOS activity among control group,CSE group,and CSE+PTC group(P＞0.05).Conclusion:Activation of bitter taste receptor T2R38 can inhibit ferroptosis in human airway epithelium NuLi-1 cells induced by cigarette smoke exposure,and its mechanism may be related to the reduction of iNOS activity in the cells.

Objective To analyze the causal relationship between obesity and central retinal artery occlusion(CRAO)based on body mass index(BMI),which is commonly used to measure obesity,and Mendelian randomization(MR)method.Methods Two-sample MR analysis was performed using summary statistics from genome-wide associa-tion studies.Exposed genetic tools were divided into the men group(n=60 586,SNP=2 736 876,European men)and women group(n=171 977,SNP=2 494 613,European women);CRAO was selected as the outcome.The instrumental variable for BMI came from the Integrative Epidemiology Unit(IEU)publicly available data;the outcome CRAO data came from the FinnGen database.Inverse variance weighting(IVW)and weighted median(WM)were used to analyze the poten-tial relationship between BMI and CRAO.Results IVW showed that the increased BMI level significantly increased the risk of CRAO in men[OR=4.57,95％CI:1.32-15.82,P=0.016]and the risk of CRAO in women[OR=3.48,95％CI:1.40-8.63,P=0.007].Meanwhile,the WM and MR-Egger analysis results supported the above conclusions.In addition,there was no heterogeneity or pleiotropy in the results of this study.Conclusion The increase in BMI is positively corre-lated with the occurrence of CRAO.This study provides an effective CRAO prevention strategy for asymptomatic patients with elevated BMI levels.

ObjectiveTo evaluate the clinical effectiveness and safety of Bairui Granules （百蕊颗粒） in the treatment of acute pharyngitis with wind-heat syndrome. MethodsA multicenter， double-blind， double-simulation， randomised controlled trial was conducted， in which 162 patients with acute pharyngitis and wind-heat syndrome from 7 centers were recruited， and each center was divided into trial group and control group on the ratio of 2∶1. In the trial group， 108 cases were orally administered with Bairui Granules plus Reyanning Granules （热炎宁颗粒） simulant， and in the control group， 54 cases were orally administered with Reyanning Granules plus Bairui Granules simulant for 5 days， with a follow-up visit on the 6th day. Full analysis set （FAS） analysis and per protocol set （PPS） were used for analysis， respectively. The primary efficacy index was the disappearance rate of sore throat after 5-day treatment； the secondary efficacy indexes were the disappearance rate of sore throat after 3-day treatment， as well as the visual analogue score （VAS） of sore throat before treatment， every day during the treatment， and follow-up on day 6， and the traditional Chinese medicine （TCM） syndrome score was performed before treatment and at the follow-up on day 6. The effectiveness on TCM syndrome was evaluated at the follow-up on day 6， and the changes of vital signs， blood routine， urine routine， liver functions， kidney function， the adverse events before and after the treatment were recorded， and safety analysis set （SS） was analysed. Results162 patients entered the FAS and SS analyses， and 158 cases （105 cases in the trial group and 53 cases in the control group） entered the PPS analysis. FAS analysis showed that the disappearance rate of sore throat after 5-day treatment was 80.56% （87/108） in the trial group and 64.81% （35/54） in the control group， and the difference between groups was statistically significant （χ² = 5.10， P = 0.0239）. PPS analysis showed that the disappearance rate of sore throat after 5-day treatment was 80.00% （84/105） in the trial group and 64.15% （34/53） in the control group， and the difference between groups was statistically significant （χ² =4.85， P = 0.0277）. FAS and SS analyses both showed that the difference in disappearance rate of sore throat between groups on 3-day treatment was not statistically significant （P＞0.05）. Compared with those before treatment， the VAS scores of sore throat were lower in both groups during treatment on day 2， 3， 4， 5， and follow-up on day 6 （P＜0.01）， but the difference between groups at each time point was not statistically significant （P＞0.05）. TCM syndrome scores of both groups at the follow-up were lower than that before treatment， and those of the trial group were lower than those of the control group （P＜0.01）. The cure rate and effective rate of TCM syndrome of the trial group were significantly higher than those of the control group （P＜0.01）. There was no significant difference in blood routine， urine routine， liver function， kidney function between groups before and after treatment （P＞0.05）， and no serious adverse events occured in both groups. ConclusionBairui Granules showed clinical effectiveness in the treatment of acute pharyngitis of wind-heat syndrome， and it could significantly improve the clinical symptoms， accelerate the disappearance time of sore throat with good safety.

Objective To investigate the expression level of circular RNA circ-TNRC6A in bladder cancer tissues and its mechanism of regulating the proliferation and migration of bladder cancer cells.Methods The expression level of circ-TNRC6A in bladder cancer tissues and its relationship with clinical stage of patients with bladder cancer were analyzed using the Cancer Genome Atlas database.The expression levels of circ-TNRC6A in human normal bladder epithelial cell SV-HUC-1 and bladder cancer cell lines(MGH-U3,5637,RT-4,T24,J82)were analyzed by real-time fluorescence quantitative PCR(qPCR).The circ-TNRC6A plas-mid(circ-TNRC6A group)and the control plasmid(NC group)were transfected into 5637 bladder cancer cells,respectively.The effects of circ-TNRC6A on the proliferation and migration of bladder cancer cells were detected by colony formation assay and cell scratch assay,respectively.The targeting relationship between circ-TNRC6A and microRNA(miR)-494-3p was predicted by bioinformatics technology and confirmed by lu-ciferase reporter gene assay.qPCR was used to detect the effect of circ-TNRC6A on miR-494-3p expression.Western blot was used to detect the effect of circ-TNRC6A on the expression of key proteins in Wnt/β-catenin signaling pathway.Results circ-TNRC6A was down-regulated in bladder cancer tissues compared with adja-cent tissues(P＜0.01).The expression level of circ-TNRC6A was correlated with the clinical stage of bladder cancer(P＜0.05).Compared with SV-HUC-1 cells,the expression of circ-TNRC6A was lower in bladder cancer cell lines(all P＜0.05),and the expression level of circ-TNRC6A was the lowest in 5637 cells(P＜0.01).Compared with the NC group,overexpression of circ-TNRC6A inhibited the proliferation of 5637 cells(P＜0.01)and reduced the migration ability of 5637 cells(P＜0.01).circ-TNRC6A could target miR-494-3p(P＜0.01).Compared with NC group,overexpression of circ-TNRC6A significantly reduced the expression level of miR-494-3p(P＜0.01)and inhibited the activation of Wnt/β-catenin signaling pathway(P＜0.01).Conclusion circ-TNRC6A inhibits the proliferation and migration of bladder cancer cells by down-regulating miR-494-3p.circ-TNRC6A may be a new therapeutic target for bladder cancer.

Objective:To investigate the causes of secondary glaucoma after vitrectomy for familial vitreous amyloidosis associated with transthyretin (TTR) gene Gly83Arg mutation.Methods:A retrospective case study. From January 2008 to January 2020, 13 cases (23 eyes) with hereditary vitreous amyloidosis and treated by vitrectomy in the Affiliated Hospital of Zunyi Medical University were collected. Among them, there were 7 males with 12 eyes and 6 females with 11 eyes. The average age was 43.0±4.8 years. All the affected eyes underwent standard three-channel vitrectomy through the flat part of the ciliary body. According to whether complete vitreous detachment (PVD) was formed during the operation, it was divided into complete PVD group and incomplete PVD group; according to the occurrence time of secondary glaucoma and vitreous amyloidosis after surgery, it was divided into 1-12 months group and 13-36 months group, >37 months group. The average follow-up time after surgery was 36.7±6.0 months. The incidence of secondary glaucoma and the recurrence rate of vitreous amyloidosis between groups were compared by χ2 test; the correlation between recurrence of vitreous amyloidosis and secondary glaucoma after surgery was analyzed by Spearman rank correlation analysis. Results:Among the 23 eyes, there were 8 eyes in the complete PVD group and 15 eyes in the incomplete PVD group, respectively. Vitreous amyloidosis recurred in 15 eyes (65.22%, 15/23) after surgery. There were 14 (93.30%, 14/15) and 1 (6.70%, 1/15) eyes in the incomplete PVD group and the complete PVD group, respectively; the comparison of the recurrence rate of vitreous amyloidosis between the two groups was statistically significant ( χ2=11.676, P<0.01). 1-12 months group, 13-36 months group, >37 months group included 1 (4.35%, 1/23), 12 (52.17%, 12/23), 2 (8.70%, 2/23) Only eye. The recurrence rate in the 13-36 months group was significantly higher than that in the 1-12 months group and >37 month group. Secondary glaucoma occurred in 11 eyes (47.80%, 11/23) after surgery. 1-12 months group, 13-36 months group, above 37 months group were 1 (4.35%, 1/23), 8 (34.78%, 8/23), 2 (8.70%, 2/23) eyes. The incidence of secondary glaucoma in the 13-36 months group was higher than that in the 1-12 months group and >37 months group. Among 11 eyes with secondary glaucoma, 10 eyes had recurrence of vitreous amyloidosis after surgery, and 1 eye had no recurrence. The results of Spearman rank correlation analysis showed that there was a positive correlation between the recurrence of vitreous amyloidosis and the occurrence of secondary glaucoma ( rs=0.516, P=0.012). Conclusion:The incidence of secondary glaucoma after vitrectomy in a family with vitreous amyloidosis caused by the Gly83Arg mutation of TTR gene is higher, and its occurrence is significantly positively correlated with the recurrence of vitreous amyloidosis.

Objective :To explore influence of ticagrelor on levels of serum high sensitive C reactive protein (hsCRP) and plasma homocysteine (Hcy) in patients with acute coronary syndrome (ACS).Methods :A total of 135 ACS pa‐ tients hospitalized in our department from Jan 2016 to Feb 2017 were selected .Based on routine treatment ,Patients were randomly and equally divided into routine group ,clopidogrel group and ticagrelor group (based on routine treatment respectively received clopidogrel or ticagrelor ) for four weeks .Levels of serum hsCRP and plasma Hcy were measured and compared among all groups before and after treatment .Results :Compared with before treat‐ment ,after four‐week treatment , there were significant reductions in levels of serum hsCRP and plasma Hcy in three groups (P＜0. 05 or ＜0.01).Compared with routine group and clopidogrel group after four‐week treatment , there were significant reductions in levels of serum hsCRP [ (12.95 ± 1.99) mg／L , (8. 56 ± 1. 24) mg／L vs.(4. 47 ± 1. 92) mg／L] and plasma Hcy [ (13.48 ± 2.12) μmol／L , (9.55 ± 0. 94) μmol／L vs.(6. 61 ± 1. 15) μmol／L] in ticagrelor group ( P＜0.05 or ＜0.01).Conclusion :Ticagrelor can significantly reduce levels of serum hsCRP and plasma Hcy while effective antiplatelet therapy ,then significantly inhibit inflammatory response ,improve vascular endothelial function ,contribute to stabilizing atherosclerotic plaques ,improve prognosis in ACS patients .

Objective To study the rule of Apaf-1 in wnt/β-catenin signaling pathway and its regulatory expression mechanism in hepatocellular carcinoma cells.Methods The regulatory mechanism of Apaf-1 gene in Wnt/β-catenin signaling pathway was verified by the TOPflash experiment;real-time PCR was used to detect the expression amounts of Apaf-1 in various hepatoma cell lines (HepG2,H HCC,HB611) and normal liver cell line(LO2);the RNAi interference plasmid of Apaf-1 was constructed and transfected into the HepG2 cell line.Then the transfection efficiency and expression of related genes and proteins were detected.Results The TOPFlash experiment found that Apaf-1 gene could inhibit the wnt/β-catenin signal pathway in a dose dependent manner;the Apaf-1 expression level in hepatoma cells was decreased compared with the normal liver cells,moreover its expression level was lowest in HepG2 cell line;RNA interfering Apaf-1 gene in HepG2 cell line,the expression level of Apaf-1 gene was significantly decreased,and the expression levels of downstream genes and protein(β-catenin,Cyclin A,CDK2,wnt5a,STAT3,EGFR,APC) in wnt signal pathway were significantly increased or decreased,the difference was statistically significant(P＜0.05).Conclusion Apaf-1 gene plays an important role in the formation process of hepatocarcinoma cells by wnt/β-catenin signaling pathway.

OBJECTIVE: To systematically evaluate the safety and efficacy of laparoscopic surgery versus conservative treatment for appendiceal abscess. METHODS: The databases of CNKI, Wangfang, VIP, PubMed, EMBASE and Cochrane Library were searched to retrieve randomized controlled trials (RCT) or clinical controlled trials (CCT) comparing laparoscopic surgery with conservative treatment for appendiceal abscess published before June 2018. The search terms were Chinese or English. Chinese search terms included appendix, abscess, and laparoscopy; English search terms included appendix, abscess, and laparoscope. References of the resulted papers, related reviews or meta-analysis references were also induded. Literature inclusion criteria: (1)RCT or CCT, whether or not to assign concealment or blinding; (2) appendiceal abscess was diagnosed at admission; (3) laparoscopic group: laparoscopic appendectomy or laparoscopy surgical methods, such as irrigation and drainage, for appendiceal abscess; conservative treatment group: conservative methods, such as antibiotics or percutaneous abscess drainage were used to treat appendiceal abscess. EXCLUSION CRITERIA: (1) review, case report, single cohort study and other non-controlled studies literature; (2) single study sample size ≤ 20; (3) subjects with simple appendicitis or perforation of appendix to form diffuse peritonitis; (4) no valid data available for extraction; (5) repeated publication of the literature. Data were extracted from the included studies, and the Cochrane Collaboration RevMan 5.1.0 version software was used for this meta-analysis. RESULTS: Three RCTs and four CCTs with a total of 591 patients were included in this study. There were 312 patients in the laparoscopic group and 279 patients in the conservative group. Compared with the conservative group, the laparoscopic group had higher uneventful recovery rate (OR=11.91, 95%CI: 4.59 to 30.88, P<0.05), shorter hospital stay (WMD=-2.98, 95%CI: -5.96 to -0.01, P=0.05), lower incidence of recurrent or residual abscess (OR=0.07, 95%CI:0.03 to 0.20, P<0.05), and shorter time to recover to normal condition for body temperature and white blood cell respectively (SMD=-2.12, 95%CI:-2.49 to -1.75, P<0.05; SMD=-2.07, 95%CI: -3.84 to -0.29, P<0.05). However, no significant difference was found in hospital charge(P>0.05). CONCLUSIONS Laparoscopic surgery for appendiceal abscess is safe and feasible. It can improve the recovery with shorter postoperative hospital stay and less recurrent or residual abscess.
Abdominal Abscess ; surgery ; therapy ; Appendix ; surgery ; Cohort Studies ; Conservative Treatment ; Humans ; Laparoscopy ; Length of Stay ; Treatment Outcome

Gastrointestinal dysfunction is a common and major complication after surgery. The syndrome covers a wide spectrum of clinical signs, ranges from mild feeling to severe discomfort and varies from person to person. The mild patients need no care, but severe ones may have long hospital stay, and even suffer from multiple organ dysfunction syndrome, severely affecting postoperative rehabilitation. However, the etiology of postoperative gastrointestinal dysfunction has not been fully elucidated. Much research demonstrates that many factors, such as operative procedures, surgical operation, homeostasis disturbance, anesthesia and analgesia, blood perfusion, inflammation, and neuroendocrine factors, are responsible for the development and progression of postoperative gastrointestinal dysfunction. This study therefore reviewed the causes of postoperative gastrointestinal dysfunction in the published literatures.
Digestive System Surgical Procedures ; adverse effects ; Gastrointestinal Tract ; physiopathology ; Humans ; Postoperative Complications ; Postoperative Period

OBJECTIVETo conduct a systematic review of the safety and efficacy of enhanced recovery after surgery(ERAS) program in perioperative management of pancreaticoduodenectomy.

METHODSA computerized search was performed in databases including PubMed, Embase, Medline, Web of Science, Cochrane Library, CNKI, Wanfang and VIP for randomized controlled trials (RCTs) or clinical controlled trials (CCTs) describing an ERAS program in patients undergoing pancreaticoduodenectomy published between January 1966 and May 2014. After assessment of methodological quality and data extraction, meta-analysis was performed using RevMan 5.2.0 software.

RESULTSSix RCTs and 8 CCTs including 2565 patients were selected for this study, including the study group(n=1366) and the control group (n=1199). Compared with the control group, the study group had a shorter length of hospital stay(WMD=-3.67, 95% CI:-5.66--1.68, P<0.05), lower postoperative complication rate(OR=0.73, 95% CI:0.56-0.95, P<0.05) and lower mortality(OR=0.63, 95% CI:0.44-0.91, P<0.05). However, no significant differences existed in mortality, readmission rate and re-operation rate between the two groups.

CONCLUSIONSEnhanced recovery after surgery programme in perioperative management of pancreaticoduodenectomy is safe and effective. But due to the medium quality of the literature. This still need more rigorously designed RCTs to prove the safety and efficiency of ERAS programme for the patients undergoing pancreaticoduodenectomy.