Objective To investigate the effects of adoptive reinfusion of regulatory T cell (Treg) on the recovery of islet function and graft survival time after islet allograft transplantation. Methods The diabetic model was established using C57BL/6 mice as recipients, and Balb/c mice were chosen as donors for islet allografts transplantation beneath the renal capsule. The recipient mice were divided into 3 groups and 3 mice in each group according to different processing Methods: Treg experiment group (Treg group, 1×10⁶ Treg cells were injected via tail vein at 1 d before operation), positive control group [sirolimus (SRL) group, SRL at a dose of 300 μg/(kg·d) was intragastrically given every day from 1 d before operation] and blank control group (control group, an equivalent volume of normal saline was intragastrically given every day from 1 d before operation). Enzyme-linked immune absorbent assay (ELISA) was used to detect the changes of blood glucose and C-peptide in mice within 14 days after transplantation. In vivo imaging technique was used to dynamically monitor the survival of mice within 14 days after transplantation. Results In each group, the blood glucose levels at postoperative 3 d were significantly decreased compared with those before transplantation (all P < 0.001). At postoperative 1 d, the C-peptide levels showed an explosive rise to varying degree in each group. At postoperative 3 d, the C-peptide levels in each group were significantly higher than that before operation (all P < 0.001). At the end of the observation period at 14 d after operation, the C-peptide levels in the SRL and Treg groups were (427±50) pmol/L and (833±57) pmol/L, relatively higher than that in the control group. But the blood glucose levels were (14.5±0.5) mmol/L and (12.1±0.6) mmol/L, significantly lower than that in the control group (all P < 0.001). Compared with the SRL group, the explosive release amount of C-peptide was significantly lower, the declining trend was more remarkably stable, and the C-peptide level was considerably higher in the Treg group at the end of the observation period (all P < 0.001). At postoperative 14 d, the grafts were almost completely apoptotic in the control group, over 50% of the grafts survived in the SRL group, and over 80% of the grafts survived in the Treg group. Conclusions Adoptive reinfusion of Treg cells can effectively protect islet grafts, prolong the survival time of grafts, and maintain the normal levels of blood glucose and C-peptide in the recipient mice.

OBJECTIVE: The current outbreak of Zika virus (ZIKV) poses a severe threat to human health. Two ZIKV strains were isolated from mosquitoes collected from the Dejiang prefecture in China in 2016, which was the first isolation of ZIKV in nature in China. METHODS: In this study, serum samples were collected from 366 healthy individuals and 104 animals from Dejiang prefecture in 2017, and the plaque reduction neutralization test (PRNT) was used to evaluate the seroprevalence of ZIKV. RESULTS: None of the 366 residents from whom the samples were collected were seropositive for ZIKV. None of the 11 pigs from whom the samples were collected were seropositive for ZIKV, while 1 of 63 (1.59%) chickens and 2 of 30 (6.67%) sheep were seropositive for ZIKV. CONCLUSION The extremely low seropositivity rate of ZIKV antibodies in animals in the Dejiang prefecture, Guizhou province in this study indicates that ZIKV can infect animals; however, there is a low risk of ZIKV circulating in the local population.

Objective: To explore the safety of liver transplantation recipients with Rh blood group mismatchming. Methods: From May 2005 to December 2018, 1 546 cases of liver transplantation in our hospital were retrospectively analyzed. Among these cases, 5 cases of Rh blood group mismatched were Rh(-) recipients receiving Rh(+ ) donor liver. For each Rh blood group mismatched liver transplantation, 5 patients received the same Rh blood group liver allograft were matched according to a certain principle and were defined as Rh-mismatch group and Rh-match group respectively. The serum alanine aminotransferase (ALT), aspartate aminotransferase(AST)and creatinine(SCr)were compared between two groups at Days 7 & 14 post-operation. Serum total bilirubin(TB), gamma-glutamyl transpeptidase(GGT)were compared between two groups at Month 1, 6 & 12 post-operation. Hemoglobin (Hb)were compared between two groups Month 1, 3 & 6 post-operation. The rates of infection, vascular complications and acute rejection was also compared. Indirect antiglobulin test (IAT)was used for detecting the production of anti-RhD antibody in patients in Rh-mismatch group at Month 1, 6 & 12 post-operation. Results: At the mentioned time, no significant inter-group difference existed in serum ALT, AST, SCr, TB, GGT and blood Hb levels(all P>0.05); Also, no significant difference existed in the incidence of infection, vascular complications or acute rejection(all P>0.05). In Rhmismatch group, 4 recipients received Rh(+ )RBC transfusion during perioperative period and no hemolytic anemia occurred after operation. Rh(D) antibody was negative at all timepoints. Conclusions Taking into account the rarity of Rh-negative blood group in Chinese, it is safe and feasible to carry out Rh blood group mismatched liver transplantation when donor or recipient with the same Rh blood group is not available.

To clone,express and purify the E Protein and EDⅢ of Zika virus in E.coli and prepare two kinds of polyclonal antibodies,the virus was amplified by Vero E6 cell culture.Total RNA was extracted by RT-PCR and reverse transcribed into cDNA.The prokaryotic expression vectors pET32a/E and pET28a/EDⅢ were constructed by cDNA sequence of E and EDⅢ gene.Then,recombinant plasmids were transformed into E.coli BL21 and induced by IPTG,and purified by Ni+ column affinity chromatography.BALB/C mice were immunized with purified recombinant proteins.Antiserum was collected and titer was determined by indirect ELISA.Western blot was used to detect the specificity.Results showed that the recombinant proteins were successfully expressed and purified.The titer of the polyclonal antibodies both reached 1:409 600.Western Blot analysis showed that the polyclonal antibodies could specifically recognize the recombinant proteins.Thus,the specific polyclonal antibody were successfully prepared,laying a foundation for further study on the pathogenesis,detection methods and immune strategies of Zika virus.

OBJECTIVETo investigate expression features and correlation of genes expression on MyD88-dependent signaling pathway in synovial membrane (SM) of progression of knee osteoarthritis (OA).

METHODSSixty Wistar rats were randomly divided into 6 groups, including blank group (N), false surgical group, model groups[2 weeks (2W), 4 weeks (4W), 8 weeks (8W) and 12 weeks (12W)], with 10 rats in each group. The models were established by using Hulth method. Control group was experienced no surgery, while false surgical group was only opened joint cavity and sutured. The SM samples was collected according to the time designed above. The relative expression quantity of MyD88, TLR4 and NF-κB was detected by Real-time PCR after the extraction of the total RNA and reverse transcription. The correlation analysis was obtained by SPSS.

RESULTSThere was no significant difference in each gene mRNA expression between false surgical and blank group(> 0.05), while enhanced expression was found in the model groups(<0.05). The correlation index among MyD88, TLR4 and NF-κB was 0.91 and 0.86 respectively, and had significant difference among them.

CONCLUSIONSPositively relative among MyD88, TLR4 and NF-κB played main role in TLR4/NF-κB signal passway, and could predicate the expression of other genes in the passway. It also could further provide the basis for clarify the pathologic mechanism of knee OA.

Objective To investigate the efficacy and safety of rivaroxaban in contrast with lowmolecular weight heparin (LMWH) in patients with active malignant tumor combined with venous thromboembolism (VTE).Methods This study was a prospective case-control study.All cases were from Zhongshan Hospital,Fudan University between Jan.,2015 and Aug.,2016.They were treated with either rivaroxaban or LMWH for anticoagulation.Patients were followed up for 90 days to observe the treatment efficacy,recurrence and bleeding events.The total efficiency,recurrence events,bleeding events and adverse events were statistically analyzed.Results A total of 67 patients were enrolled in this study.Among them,37 cases aged 38-84 years old were assigned to LMWH group,of which 16 cases (43.2％) were male.Another 30 cases aged 45-88 years old were assigned to rivaroxaban group and 12 cases (40.0％) were male.There was no statistically significant difference between the two groups.The total effective rate (P =0.699),recurrence events (P =0.774),bleeding events (P =0.490) and adverse events (P =0.448) between the LMWH group and the rivaroxaban group had no significant difference.Conclusions Rivaroxaban and LMWH anticoagulation had similar safety and efficacy in patients with active malignant tumor combined with VTE.

Objective To study liver transplantation in the treatment of alcoholic liver disease (ALD).Methods A retrospective study was conducted on 40 patients with ALD who underwent liver transplantation in the Changzheng Hospital of the Second Military Medical University from April 2005 to June 2017.The data were expressed as mean ± standard deviation ((-x) ±s) in populations with a normal distribution,and as median (min～max) in populations with an abnormal distribution.The survival rate was analyzed by life tables,and the Cox regression analysis was used for multivariate analysis.Results All patients were followed up until August 31,2017.The follow-up time was 2 ～ 4518 days,with a median of 997 days.Among the 40 patients,8 had already died (3 died of multiple organ failure,2 of biliary complications,1 of liver failure,1 of sepsis and 1 of recurrence of hepatocellular carcinoma (HCC).The 1-year survival rate was 81.0％,and the 5-year survival rate was 77.0％.Four of 40 patients developed tumor recurrence.The initial recurrence time was 189 ～ 337 days (median 236.5).The recurrence sites included the liver,colon combined with lungs,lungs,and lumbar vertebrae.Six of 40 (15.0％) patients had relapse in alcoholism.Multivariate analysis showed that age was a prognostic factor (RR =1.109,P ＜0.05).Years of drinking,daily amount of alcohol intake,abstinence,a previous history of upper gastrointestinal bleeding,a previous history of splenectomy,co-existing hepatocellular carcinoma,preoperative MELD score,preoperative Child-Pugh score,total operation time,anhepatic period,cold ischemia time,amount of intraoperative bleeding,postoperative alcoholism relapse,tumor recurrence or new onset of tumor were not significantly correlated with the postoperative survival rate (P＞0.05).Conclusions ALD patients were mostly 40 ～ 60 years old.Age was an independent factor affecting survival.The younger the patient,the better the prognosis.Other factors were of no prognostic significance.

Objective To summarize our experience in the diagnosis and treatment of hepatic epithelioid angiomyolipoma (HEAML),with the aim to reduce the future misdiagnosis rate.Methods The PubMed,Medline,China Science Periodical Database (CSPD),and VIP Databases were searched from January 2000 to March 2018 on all reports on HEAML.Results There were 409 cases of HEAML in 97 reports.The ratio of men to women was 1∶4.84.The age ranged from 12 to 80 years and the median age was 44 years.61.9％ of patients (205/331) were asymptomatic,while 34.7％ (115/331) had upper or right upper quadrant abdominal discomfort.Some patients presented with abdominal mass,gastrointestinal reaction,low grade fever or weight loss.The clinical symptoms in 78 patients were not mentioned in the reports.The misdiagnostic rate of HEAML was as high as 40.3％ (165/409).The imaging findings of HEAML were nonspecific.Ultrasound,CT and MRI scan usually showed contrast enhancement in the arterial phase.Most lesions were accompanied by central vessels with early drainage veins.The enhanced scans showed varied characteristics.The ratios of fast wash-in and fast wash-out,to fast wash-in and slow wash-out,and to delayed enhancement were roughly 4∶ 5∶ 1.A definitive diagnosis of HEAML is based on the pathological findings of epithelioid cells in the lesions and the expressions of HMB45,SMA,Melan-A and Actin on immunohistochemical staining.HEAML had a relatively low malignant rate of 3.9％.Surgical resection was the main treatment for HEAML.Conclusion HEAML was a rare and easily misdiagnosed disease.,which could be diagnosed by taking into account the clinical course,imaging,pathological and immunohistochemical findings.HEAML.