[Objective]To study the effect of Simvastatin on the regeneration of sciatic nerve of rats and its mechanism of immunoregulation.[Method]Twenty eight female Sprague-Dawley rats were used and the rats experienced the sciatic nerve crush injury.Animals were randomized into: Simvastatin-treated crush injury animals,vehicle-treated crush injury animals and sham-operated animals.Simvastatin(20 mg/kg) was given once a day over a time period of 14 day sby oral gavage via a pharyngeal tube.After surgery,the functional evaluation of nerve recovery,electrophysiologic assessment,histological assessment,serum IL-6 and TNF-? assessment were performed.[Result]The toe spread index of Simvastatin-treated crush injury animals was higher significantly than that of vehicle rats at d5 and d8(P

Objective To explore clinical characteristics of Chinese patients with lupus erythematosus (LE).Methods Data were obtained from the Lupus Erythematosus Multicenter Case-control Study in Chinese populations (LEMCSC).A unified standard was used to recruit patients and collect clinical information.The EpiData 3.1 and SPSS 18 softwares were utilized to input and analyze data respectively.Results One thousand and six patients (87.6％ female) with lupus erythematosus (LE) were included in this analysis,of whom,887 (89.9％ female) had systemic LE (SLE),and 119 (70.6％ female) had isolated cutaneous LE (CLE).The most common involved system in SLE patients was skin (72.7％),followed by joints (69.2％),hematological system (60.8％),kidney (48.5％),serosa (18.2％),and nervous system (5.7％).The appearance of LE-specific skin manifestations was associated with an increased risk of arthritis (odds ratio [OR] =1.612,95％ confidence interval [CI]:1.181-2.200),but with a decreased risk of nephritis (OR =0.218,95％ CI:0.157-0.303) and serositis (OR =0.311,95％ CI:0.218-0.443).The presence of acute CLE (ACLE) lesions was a risk factor for systemic involvement (OR =4.931,95％ CI:3.232-7.524),while that of chronic CLE (CCLE) lesions was a protective factor for systemic involvement (OR =0.355,95％ CI:0.234-0.541).The appearance of LE-nonspecific skin manifestations was closely correlated with the involvement of internal organs in patients with LE.Conclusion This study revealed main characteristics of LE patients in China and the relationship between LE-related skin lesions and internal organ involvement.

Objective To investigate the significance of serum krebs Yon den lungen-6(KL-6), surfactant protein A(SP-A), surfactant protein D(SP-D )and matrix metalloprotease 7(MMP-7) in the diagnosis of idiopathic pul-monary fibrosis (IPF) and its relationship with pulmonary function .Methods Serum levels of KL-6, SP-D, SP-A and MMP-7 were detected by ELISA in 38 patients with IPF and serum from 38 patients with pneumonia and 38 normal controls.Serum levels of markers were further analyzed by operating characteristic curve receiver (ROC), from which the ideal level of each serum marker was obtained , and the follow-up of 6 months in patients with IPF . Explore the significance of the diagnosis of IPF and its correlation with pulmonary function .Results The expres-sion of MMP-7, SP-A, SP-D and KL-6 in serum of IPF patients was higher than that in the control group and healthy control group ( P<0.05) .The optimal cutoff value of KL-6 was 723.0 U/ml, SP-A was 67.2 ng/ml, SP-D was 98.1 ng/ml, and MMP-7 was 10.1 ng/ml.The sensitivity of KL-6 was 71.1% and 98.7%, SP-A was 81.6%and 97.4%, SP-D was 81.6%and 97.4%, MMP-7 was 68.4%and 98.7%.The sensitivity of combined KL-6, SP-A, SP-D and MMP-7 four serum markers was 100%, compared with a single serum index , the P value was less than 0.05, with statistical significance .IPF patients serum SP-A, MMP-7 and forced vital capacity within 6 months were significantly correlated(r1 =-0.574,P1 <0.001;r2 =-0.465,P2 =0.003).Conclusion KL-6, SP-A, SP-D and MMP-7 were highly expressed in serum of patients with IPF , and in the diagnosis of IPF , com-bined detection of 4 serum markers can improve the early diagnosis of IPF patients .Combined serum SP-A and MMP-7 levels can improve the accuracy of the IPF patients with pulmonary function changes , the prediction of dis-ease progression has a certain significance .

Animals ; Basic Helix-Loop-Helix Transcription Factors ; metabolism ; physiology ; Cadherins ; metabolism ; Cell Transformation, Neoplastic ; metabolism ; pathology ; Epithelial Cells ; pathology ; Homeodomain Proteins ; metabolism ; physiology ; Humans ; Mesenchymal Stromal Cells ; pathology ; Neoplasm Invasiveness ; Neoplasm Metastasis ; Neoplasms ; metabolism ; pathology ; Snail Family Transcription Factors ; Transcription Factors ; metabolism ; physiology ; Zinc Finger E-box-Binding Homeobox 1

Objective To observe the effect of systemic chemotherapy on conditions of tumor infiltrating,metastasis and disease-specific survival (DSS) for advanced retinoblastoma (RB).Methods Forty-one patients with advanced RB who received enucleation were enrolled in this study.There were 26 males and 15 females,age at diagnosis was ranged from 2 to 72 months,with a mean of 23.08 months.There were 16 bilateral patients and 25 unilateral patients;13 group D eyes and 28 group E eyes.16 patients received enucleation as the primary treatment (operation group),25 eyes received chemotherapy before enucleation (chemotherapy group).There was no significant statistical difference between two groups for the gender,unilateral and bilateral,international staging or diagnostic age (P＞0.05).The histopathology report was performed to assess the risk of postoperative tumor-node-metastasis staging (pTNM) in each patient,and the extent of tumor invasion in the optic nerve,choroid and anterior chamber was divided into 3 levels of low risk,medium risk and high risk.Five deaths were all in the group E with chemotherapy before enucleation.Using R software survival analysis software package survfit function,the application of Kaplan-Meier estimation method,DSS of RB children was calculated from the time of diagnosis,up to the date of the death of patient.DSS differences between chemotherapy,operation group and eye removal time (more than 3 months,less than 3 months) in group E RB children were analyzed.Results The proportion of high risk pTNM stage in chemotherapy group was significantly lower than the operation group.But there was no significant difference between the two groups in the overall risk classification (x2 =3.130,P=0.077).For group D eyes,the overall risk classification in chemotherapy group was significantly lower than the operation group (x2 =5.870,P=0.015).There was no significant difference between the two groups in the overall risk of group E eyes (x2 =0.020,P=0.889).The DSS in chemotherapy group and operation group were 0.71 and 1.00,respectively;the difference was significant (x2 =3.700,P=0.05).The DSS in children whose enucleation delayed for more than 3 months and children whose enucleation performed within 3 months were 0.64 and 1.00,respectively;the difference was significant (x2 =4.800,P=0.028).Conclusion Systemic chemotherapy did not reduce the risk of tumor invasion and metastasis in patients with advanced RB.Instead,it will reduce the DSS in group E eyes of RB.

Objective:To study the experience of frontline medical workers in COVID-19 quarantine points.Methods:Purposive sampling method was employed and 12 frontline medical workers in COVID-19 points of Zhaoyuan City were selected for semi-structured and in-depth interview. Colaizzi′s seven-step analysis method was adopted to analyze and categorize the data.Results:The real experience of frontline medical workers in quarantine points were classified into five themes: professional mission and pride, inadequate initial response in dealing with public health emergencies (shortage of personal protective equipment,inadequate preparation of medical workers and imperfect settings of quarantine points), having some negative emotions (worrying about being infected and feeling fearful for family members), facing complex and diverse working difficulties (repugnance and diversified demands of people quarantined, heavy workload, discomfort from personal protective equipment and occupational exposure), and gaining support and appreciation (getting support from epidemic control and prevention departments as well as medical systems and winning appreciation from people quarantined).Conclusions:The frontline medical workers are lack of experience in dealing with public health emergencies and have some psychological and working pressure. Administrative department should further complete the emergency plan of centralized isolation medical observation, strengthen the contingency management of public health emergencies, attach importance to the mental health of medical workers, optimize management methods and establish flexible work schedules.

Actins ; metabolism ; Adenocarcinoma ; pathology ; Adult ; Diagnosis, Differential ; Endometriosis ; pathology ; Epithelium ; pathology ; Female ; Gastrointestinal Stromal Tumors ; pathology ; Hamartoma ; metabolism ; pathology ; Humans ; Muscle, Smooth ; pathology ; Stomach Diseases ; metabolism ; pathology

Castleman Disease ; genetics ; pathology ; surgery ; Diagnosis, Differential ; Female ; Gene Rearrangement, B-Lymphocyte, Heavy Chain ; Humans ; Hyperplasia ; Lung ; pathology ; surgery ; Lung Diseases ; genetics ; pathology ; surgery ; Lymph Nodes ; pathology ; Middle Aged

Objective To obtain highly purified botulinum neurotoxin A light chain(BoNT-ALC) protein in E.coli by genetic engineering and multi-step purifications, and identify its metalloproteases activity.Methods The full-length of BoNT-ALC was cloned from BoNT A by PCR and inserted into plasmid pET-22b.Then pET-22b-ALC was transformed into E.coli BL21( DE3) strains and induced by IPTG.The protein was purified by Ni-NTA sepharose,anion exchange column and gel filtration.The enzymatic activity of the protein was identified by SNAP-25.Results and Conclusion A highly purified and homogeneous protein is obtained, which shows good enzymatic activity.

Objective To explore the effect of the JAK/STAT signal pathway on the apoptosis-related gene in the synovial tissue of rat rheumatoid arthritis (RA).Methods Fifty rat models of collagen-induced arthritis,whose arthritis index was more than 2,were divided into the model group,the low dose of AG490 group,the medium dose of AG490 group and the high dose of AG490 group.In addition,6 rats were treated intraperitoneal injection.Then,the arthritis index and the change of apoptosis-related genes were compared.Multiple-sample average was analyzed by single-factor x2 test and LSD-t or Tamhane's T 2 test were used for two-two comparison.Results The arthritis index of the model group increased evidently,and the apoptosis inhibitor Bcl-2,Bcl-xl gene and protein expression was up-regulated,which was significantly different when compared with that of the control group(0.931±0.035 vs 0.351±0.024,0.920±0.037 vs 0.271±0.029,0.322±0.047 vs 0.230±0.031 ).The expression of apoptosis promoting factor Bax wasslightly up-regulated.The blockage of JAK/STAT pathway cotld down-regulate the expression levels of the gene and protein of survivins Bcl-2 and Bcl-xl,and up-regulate the gene and protein expressions of Bax.Conclusion In the process of RA development,apoptosis inhibitor Bcl-2,Bcl-xl gene and protein expression is up-regulated.JAK/STAT signal transduction pathway regulates the apoptosis process.