BACKGROUND: To summarize the progress of tissue engineering in repairing spinal cord injury in recent years.DATA SOURCES: A computer-based online search of PubMed database (http://www.ncbi.nlm.nih.gov/PubMed) and CNKI database (www.cnki.net/index.htm) was performed for articles published between September 1999 and September 2009 with the key words of "spinal cord injury, tissue engineering" in English and Chinese, respectively. Articles published recently or in authoritative journals in the same field were selected.DATA SELECTION: Inclusion criteria: clinical or experimental study about tissue engineering in repairing spinal cord injury.Repetitive studies were excluded. A total of 29 articles were included.MAIN OUTCOME MEASURES: Seed cell selection of tissue engineering; requirements of scaffold materials of tissue-engineered spinal cord, neurotrophic factor for regeneration, special internal environment construction for regeneration.RESULTS: Seed cells of tissue-engineered spinal cord include Schwann cells, olfactory ensheathing cells, embryonic stem cells, neural stem cells and bone marrow stromal stem cells. Scaffold materials involve synthetic or modified natural materials, such as polyglycolic acid, polylactic acid, and lactic acid/glycolic acid copolymer, which benefit cell attachment and nutrition factor aggregation following surface modification. Antibodies that promote or inhibit nerve growth factor in combination with polyoxyl are coupled to function as tissue-engineered scaffold, which may be approaches to repair spinal cord injury by tissue engineering in combination with stem cell transplantation and electric field/magnetic field stimulation.CONCLUSION: The optimal elements for tissue engineering are the key role in repairing spinal cord injury by tissue engineering.

Objective:To review effects of functional electrical stimulation(FES) on paralyzed or paretic muscles,and introduce the progress of functional electrical stimulation repairing spinal cord injury.Methods:A computer-based search was conducted in CNK/and MEDILINE for articles related to functional electrical stimulation repairing spinal cord injury from November 1990 to November 2009 with the Keywords of spinal cord injury and electrical stimulation.Data were check firstly.Articles related to functional electrical stimulation repairing spinal cord injury were selected and looked for full-texts.The articles were analyzed and summarized.Results:Functional electrical stimulation (FES) can activate paralyzed or paretic muscles to generate functional or therapeutic movements with constant frequency.FES can improve the impaired motor function of muscles stimulated.Functional electrical stimulation technique could repair part of motor function following spinal cord injury.Conclusions:Functional electrical stimulation is a new and promising technique in modem rehabilitation engineering.Functional electrical stimulation (FES) can activate paralyzed or paretic muscles to generate functional or therapeutic movements.FES can improve the impaired motor function of muscles stimulated.

Seventy-four men aged 20-50 years with normal glucose tolerance were divided into abdominal obese group(n=36),simple obese group(n=16),and normal body weight group(n=22).One-hour postload plasma glucose(1hPG)and carotid intima-media thickness(IMT)were higher in abdominal obese group than those in simple obese group and control group(all P<0.01).IMT was positively correlated with 1hPG(P<0.05).In multiple regression analysis,waist circumference and triglycerides were independent predictors for IMT.

Forty-eight men with normal glucose tolerance were divided into fatty liver disease ( NAFLD, n =23 ) and non-NAFLD (n =25 ) groups. The blood glucose excursion was evaluated by continuous glucose monitoring system. The results showed that the mean amplitude of glucose excursion[MAGE, (2. 17± 1.13 vs 1.45±0. 42 )mmol/L]and standard deviation of blood glucose[SDBG, (0. 88 ±0. 45 vs 0. 61 ±0. 21 ) mmol/L]were significantly higher in NAFLD group than in non-NAFLD group( both P＜0. 05 ). MAGE and SDBG were positively correlated with body mass index, waist circumference, and the increased value of plasma glucose 0. 5 h after glucose loading( △G30,all P＜0. 05 ). In multiple regression analysis, △G30, waist circumference, and age were significant independent predictors for MAGE( P＜0. 05 or P＜0. 01 ). △G30 and waist circumference were significant independent predictors for SDBG( P＜0. 05 or P＜0. 01 ).

SHIV-CN97001 played an important role in assessing the immune effect and strategy of the AIDS vaccine which included genes of the predominant prevalent HIV-1 strain in China. In this study, SHIV-CN97001 was in vivo passaged serially to construct pathogenic SHIV-CN97001/rhesus macaques model. To identify variation in the gp120 region of SHIV-CN97001 during passage, the fragments of gp120 gene were amplified by RT-PCR from the plasma of SHIV-CN97001 infected animals at the peak viral load time point and the gene distances (divergence, diversity) were calculated using DISTANCE. The analysis revealed that the genetic distances of SHIV-CN97001 in the third passage animals were the highest during in vivo passage. It had a relationship between viral divergence from the founder strain and viral replication ability. The nucleic acid sequence of the V3 region was highly conservative. All of the SHIV-CN97001 strains had V3 loop central motif (GPGQ) and were predicted to be using CCR5 co-receptor on the basis of the critical amino acids within V3 loop. These results show that there was no significant increase in the genetic distance during serial passage, and SHIV-CN97001 gp120 gene evolved toward ancestral states upon transmission to a new host. This could partly explain why there was no pathogenic viral strain obtained during in vivo passage.

Objective To know the prevalence of chronic obstructive pulmonary disease(COPD) in patients with obstructive sleep apnea-hypopnea syndrome(OSAHS) in Kunming Yunnan Province, and the clinical symptom of OS.Methods Retrospective study of 4 636 cases of patients with snoring, excluding COPD in addition to chronic respiratory disease and assess the patient`s condition.The test included AHI, BMI, Epworth sleepiness scale, lung function.The index of OS was confirmed by AHI>5 times/h and FEV1/FVC<70%.Results During the period of 2006 to 2012, he prevalence of COPD in patients with OSAHS was 10.1% [95% confidence interval (CI) 9.1%-11.1%] in Kunming Yunnan Province.And male`s OS prevalence rate is higher than the female(male 10.2%;female 9.7%).The OS patients` average age was 56.9±14.1, the mean AHI was (47.46±26.79) times/h, and the average FEV1/FVC was 60.09%±23.57%.Polysomnographyresults show that patients suffered obvious hypoxiaat night in both OSAHS group and OS group, but it was more significant in OS group.Pulmonary function test showed that OS patients have more serious chronic obstructive pulmonary disease.Conclusions The prevalence of COPD in OSAHS patients was high in Kunming, Yunnan Province, and the prevalence rate in old group reached more than 24%.In addition, the sympotms of patients with OS were more severe than those with only OSAHS or COPD in lung function and hyoxemia.

ObjectiveTo develop school refusal reason inventory (SRRI)for children and adolescents in China and assess its reliability and validity.MethodsThe primary SSRI was made based on clinical interviews and literatures.Pretest was carried out in a small sample from a clinic.Then the final SSRI was developed after qualitative analysis and item analysis.SRRI,the Screen for Child Anxiety Related Emotional Disorders(SCARED) and Child Depression Inventory(CDI) were administered to school refusers from 7 schools in Shenyang.All the schools were selected from Shenyang City and its countryside by cluster sampling.Some of the students were retested after one month.Descriptive statistics and exploratory factor analysis were carried out to examine the reliability and validity of SRRI based on all the data.Results Item analysis indicated correlation coefficients between all the items and the total marks were higher than 0.3,and they were significant.All the critical ratios of the items were higher than 0.3.The 43 items were divided into six factors ( educational modality,factor of teachers,relationship with classmates,separated anxiety,study attitude and study environment) by exploratory factor analysis.The factor loading values were 0.372 ～0.848.The cronbach's α of each factor was 0.827,0.831,0.759,0.623,0.821 and 0.808.Retest reliability was 0.644 (P ＜ 0.01 ).Its correlation coefficient with SCARED was 0.452 and 0.548 with CDI.ConclusionAccording to Chinese cultural back ground,the SSRI corresponds with psychometric indexes.There are good reliability and validity.It is helpful to understand the reasons of school refusal behavior in children and adolescents.

OBJECTIVETo explore the influence of the DNA repair gene ERCC2 single nucleotide polymorphisms (SNPs) rs13181, rs1618536, and rs1799793 on male idiopathic infertility in Ningxia, China.

METHODSUsing MassArray, we conducted a case-control study and genotyped three ERCC2 SNPs rs13181, rs1618536, and rs1799793 for 351 males (aged 31.0 +/- 4.2 years) with idiopathic infertility and another 327 normal fertile men (aged 33.0 +/- 5.9 years) as controls.

RESULTSThe ERCC2 AnyG-anyA-anyA genotypes were significantly associated with an increased risk of idiopathic infertility (OR 0.414, 95% CI 0.176 - 0.970), while the three single ERCC2 SNPs rs13181, rs1618536, and rs1799793 showed no significant differences between the cases and controls (P > 0.05).

CONCLUSIONThe ERCC2 SNPs rs13181, rs1618536, and rs1799793 play a role of interaction in male idiopathic infertility in Ningxia, contributing to the risk of the disease.

Adult ; Case-Control Studies ; China ; DNA Repair ; Genotype ; Humans ; Infertility, Male ; genetics ; Male ; Polymorphism, Single Nucleotide ; Xeroderma Pigmentosum Group D Protein ; genetics

Objective To analyze the relationship between the catheter to vein ratio and the formation of peripheral insertion of central venous catheter (PICC) related upper extremity deep venous thrombosis (PICC-UEDVT) in cases having undergone PICC in patients at intensive care unit (ICU) and further identify the best optimal ratio cut-off point to reduce the incidence of PICC-UEDVT.Methods A retrospective study was conducted, including 69 patients having undergone PICC with complete clinical data admitted to the Department of Critical Care Medicine of the First Affiliated Hospital of Nanchang University from August 2013 to December 2016; their ages were > 18 years old and catheter indwelling times were > 1 week; the patients' basic information, disease related laboratory parameters and catheter insertion situation were collected. According to the occurrence of PICC-UEDVT, they were divided into PICC-UEDVT group and non PICC-UEDVT group; the receiver operating characteristic (ROC) curve of the catheter to vein ratio versus the incidence ofPICC-UEDVT was plotted to assess the optimal ratio to reduce the incidence of PICC-UEDVT.Results In the 69 patients, there were 7 patients in the PICC-UEDVT group and 62 patients in the non PICC-UEDVT group, the incidence of PICC-UEDVT being 10.14%. Four, 5 and 6 French (Fr) catheters were indwelled in 43, 23 and 3 cases respectively, and the range of catheter to vein ratio was 20% - 67%. The comparisons between PICC-UEDVT group and non PICC-UEDVT group in various aspects were as follows: the incidence of DVT in the PICC-UEDVT group was significantly higher than that in non PICC-UEDVT group [42.9% (3/7) vs. 6.5% (4/62)], the rate of using vasopressor drugs [57.14% (4/7) vs. 17.74% (11/62)], D-dimer level [mg/L: 9.0 (3.0, 12.3) vs. 1.8 (1.0, 3.6)], patients of indwelling 5Fr catheter [71.4% (5/7) vs. 29.0% (18/62)] and the percentage of patientsapplying catheter to vein ratio 45%-67% [57.14% (4/7) vs. 17.74% (11/62)] in PICC-UEDVT group were all higher than those in the non PICC-UEDVT group, the differences being statistically significant (allP < 0.05). ROC analysis showed that the catheter to vein ratio 44% was the optimal cut off or critical point, the area under the ROC curve (AUC) at that point was 0.755, 95% confidence interval (95%CI) = 0.554-0.955, sensitivity = 71.4% and specificity = 79.0%; compared with the patients using 45%-67% catheter to vein ratio, the incidence of PICC-UEDVT was 6.182 times higher than those using the ratio 20%-44% [odds ratio (OR) = 6.182, 95%CI = 1.208-31.634,P = 0.036]; however, there was no significant difference in incidence of PICC-UEDVT between 20%-32% and 33%-44% (P = 1.000).Conclusion It is found that the 44% catheter to vein ratio was the optimal critical point to reduce the incidence of PICC-UEDVT, possessing relatively high sensitivity and specificity; applying <44% catheter to vein ratio can decrease the risk of PICC-UEDVT occurrence in patients at ICU.

Objective To summarize clinical experience of reconstructive operation with transpositional colon behind the sternum after corrosive esophageal burns and to explore the treatment for its complications.Methods Clinical data of 65 cases with esophageal scarred stricture after corrosive burns receiving reconstructive operation with transpositional colon behind the sternum were reviewed,56 of them by end-to-end anastomosis between transpositional anterograde peristaltic colon and esophagus,seven by end-to- end anastomosis between transpositional anterograde peristaltic colon and pharyngeal fundus,and two by end- to-end anastomosis between transpositional reversed peristaltic colon and esophagus,to summarize treatment experiences in pre-operation,operation and post-operation.Results Fifty-one of this group of patients recovered and discharged form the hospital smoothly,12 with cervical anastomotic leakage after operation including two cured by re-operation and ten cured by conservative treatment,and two with necrosis of transpositional colon including one died during operation and the other cured.Conclusions Corrosive burns of esophagus can be cured by leaving scarred stricture esophagus open without resection,and the effectiveness of reconstructive operation with transpositional colon behind the sternum is satisfactory with good pre-operative preparation,correct surgical operation,and correct post-operative treatment.