BACKGROUND:Knee cartilage injury is difficult to heal, which is an urgent clinical problem to solve. OBJECTIVE:To summarize the advantages of synovial mesenchymal stem cel s in the treatment of knee cartilage injury. METHODS:A computer-based search of PubMed was performed for articles related to synovial mesenchymal stem cel s for knee cartilage injury using the keywords of“knee joint, cartilage, synovial membrane, tissues, injuries and repair”. A total of 48 articles were retrieved initial y, and 35 articles were included in result analysis. RESULTS AND CONCLUSION:Synovial mesenchymal stem cel s for treatment of knee cartilage injury can achieve more ideal outcomes. Mesenchymal stem cel s inherent in the damaged tissue are the optimal seed cel s for tissue repair.

BACKGROUND: Poly-lactic glycolic acid (PLGA) is a promising cell scaffold material. However, its hydrophilicity and cellular affinity is poor, so it is necessary to modify its performance.OBJECTIVE: To explore the hydrophilic ability of the modified PLGA scaffold compounded with type Ⅰ collagen, and the cellular biocompatibility with chondrocyte of rabbit ear.METHODS: PLGA scaffold was modified with Poly-L-Lysine and compounded with type I collagen. The gross structure of scaffold was observed by inverted microscopy. The modified PLGNtype-Ⅰ collagen scaffold (experimental) and PLGA scaffold (control) were immerged in distilled water for 0.5, 1, 2, 4, 8, 12 and 24 hours. Chondrocytes were cultured by enzyme digestion method, and the second passage cells were seeded on surfaces of two scaffolds. Cell morphology was observed by phase contrast microscopy; cell attachment rate 24 hours after seeding was calculated, and the cell proliferation was determined by MTT assay at 1, 2, 4 and 6 days.RESULTS AND CONCLUSION: Modified composite scaffold exhibited high porosity and increased surface roughness compared with control group. Water uptake of two scaffolds displayed statistically significance at the same time point (P < 0.01), indicating the modification improved the hydrophilicity. The attachment rate of chondrocytes was 0.908 0+0.019 2 in modified compound scaffolds and 0.733 2±0.047 5 in control scaffold after 24 hours (P < 0.05), indicating the improved cellular affinity following modification. After 1, 2, 4 and 6 days, the absorbance between two groups was significantly different (P < 0.05), indicating the modified scaffold improved cell proliferation.

objective: To evaluate the effects of the pendulum appliance on arch length, arch width, overbite and overjet. Methods: Pendulum appliances were applied for distalization of maxillary molars in 37 patients whith class Ⅱ malocclusion and 1-Ⅱ degree crowded dentition in upper dental arch. Pretreatment and posttreatment model analysis was conducted. Results: 37 patients treated for 18.2?4.5 weeks with pendulum appliance were accomplished . The increase of arch arc length between the maxillary first molars was (17.36?4.38) mm, the decrease of anterior arch width (-3.04?1.59) mm, and the decrease of posterior arch width (-1.29?2.01) mm . Differences between the pretreatment and posttreatment were significant, including arch arc length between the maxillary first molars ( P

Objective:To evaluate effects of traction arch combined with protraction on dental and skeletal changes in patients with Angel Ⅲ malocclusion in mixed dentition.Methods:Seventeen patients with Angle Ⅲ malocclusion were selected and treated with traction arch combined with protraction. Cephalometric radiographs were taken 6 months before the initiation of treatment, at the initiation of treatment and 6 months after treatment.Cephalometric analysis was used to examine the dental and skeletal changes.Results:Significant changes of maxillary anterior displacement and mandibular downward and backward rotation were observed in the seventeen patients:SNA increased 2.6?,A point moved forward 3.1 mm. The overjet correction of anterior teeth was 5.2 mm, 63% of the overjet correction was due to skeletal changes and 37% due to dental changes. Conclusion:Traction arch combined with protraction is a simple and effective apparatus in the treatment of Angle Ⅲ malocclusion.

ObjectiveTo summarize the application experience of laparoscopic totally extraperitoneal prosthetic(TEP) for inguinal hernia in grass-root hospitals.MethodsThe clinical data of 63 cases of inguinal hernia treated by TEP were retrospectively analyzed,and operation scheme suited to the actual conditions of grass-root hospitals was summed up.ResultsAmong the 63 cases,5 cases were treated by transabdominal preperitoneal repair of inguinal hernia(TAPP) to complete the operation because of relatively serious peritoneal rupture.No case was converted to open surgery.11 cases were subjected to continuous epidural anesthesia and the other cases to endotracheal anesthesia.17 cases gained satisfactory result withoutstapling fixation.Among them,a few people had postoperative complications:3 cases of pneumoscrotum,1 case of hematoma of scrotum and 2 cases of early groin pain.No case recurred.ConclusionTEP is a safe and effective operation method in grass-root hospital for inguinal hernia repair.A reasonable selection can be taken according to the individual condition of patients including operation,anaesthesia,mesh style and stapling fixation,to ensure the operation quality,to reduce the medical wst and to reduce the economic burden of the patients.

Objective To investigate the validity and reliability of Item Erectile Function Scale (I-EF) for neurogenic erectile dysfunc-tion (ED). Methods 104 patients with spinal cord injury were assessed with I-EF. They were measured with pudendal somatosensory ner-vous evoked potential (SEP), bulbocavernosus reflex potential time (BCR) and nocturnal penile tumescence (NPT) detection. 34 patients ac-cepted medicine for ED, and were assessed with I-EF after treatment. 21 patients with medium ED were assessed by 2 testers, and retested 2-4 weeks later. Results The patients who recorded their potential of SEP and BCR got the scores of Q1, Q2 above 7, and the absence with the scores of 3. Those found NPT 1-3 times got the score of Q3 above 7, and the absence with the scores of 3. The incidence of reflex erec-tions and NPT were more in complete suprasacral ones than in complete sacral ones (P<0.05). There was significant improvement after med-ication in patients with mild to medium ED (P<0.05). The interclass correlation coefficient (ICC) was 0.93 between testers and 0.90 between test-retest. Conclusion I-EF can be used to assess neurogenic erectile dysfunction for rehabilitation.

In this study ,we intended to prepare anti‐Toxoplasma gondii aquaporin (TgAQP) peptide antibody which was used to the application in the detection of the aquaporin expression and its subcellular localization of Toxop lasma gondii (T .gondii) ME49 strain .The B cell peptide antigen was designed based on the TgAQP amino acids sequence .After the pep‐tide antigen was conjugated to the KLH ,the fusion antigen was injected into New Zealand rabbits to prepare polyclonal anti‐body ,followed by identification of ELISA ,Western‐blotting and immunofluorescence assays .The ELISA showed that the titer of anti‐TgAQP antibody was about 1∶40 000 .Western blotting revealed the specific affinity of the antigen to polyclonal anti‐body at 29 .9 kDa protein T .gondii .The protein detected by the indirect immunofluorescence assays was distributed in the cy‐toplasm of the parasite .Thus far ,the anti‐TgAQP polyclonal antibody was successfully prepared ,providing a useful tool for further study of biological function and metabolic characteristics of TgAQP .

Objective To evaluate the effectiveness and safety of Botulinum toxin-A (BTX-A) injection into detrusor to treat neurogenic detrusor overactivity in patients with spinal cord injury (SCI).Methods A total of 78 patients with SCI were treated with transurethral injection of BTX-A (300 IU dissolved in 15 ml of saline) into 30 different points of detrusor with 15 ml in every patients. Urodynamic parameters and voiding diary were assessed at baseline and 3 weeks and 3 months after the injections. Adverse events were recorded after the injection if present.Results After the first injection, 78 patients showed that the mean frequencies of incontinence decreased from 13.5 to 2.7 times per day, the mean volume of intermittent catheterization (IC) increased from 131 ml to 389 ml per time, the mean volume of incontinence decreased from 1 690 ml to 281 ml per day, the mean getting effect time was 7.6 days. 10 patients received second injection at 8.9 months after first injection, the results showed that the mean frequencies of incontinence decreased from 9.7 to 3.7 times per day, the mean IC volume increased from 108 ml to 387 ml. 6 patients received third injection at 5.8 months after second injection, the results showed that the mean frequencies of incontinence decreased from 9.2 to 3.9 times per day, the mean IC volume increased from 116 ml to 364 ml. No side effects were observed during the follow-up.Conclusion BTX-A injection into detrusor to treat neurogenic detrusor overactivity in patients with SCI seems to be an effective, safe and miniinvasive solution.

Objective To detect the level of plasma microRNA-1 (miR-1) in acute myocardial infarction (AMI) and compare the diagnostic values of it with that of cardiac troponin T (cTnT).Methods During 2011-05 to 2012-05,there were fifty-six plasma samples taken from patients with AMI and twenty-eight plasma specimens got from non-AMI controls were analyzed.The expression of plasma miR-1 was measured by quantitative reverse transcription-polymerase chain reaction (qRT-PCR),and the level of plasma cTnT was measured by using electrochemiluminescence-based methods on the Elecsys 2010 Immunoassay Analyzer.Then,the SPSS 16.0 was used for the statistical analysis.Data were presented as means ± standard deviation unless otherwise described.The differences about clinical characteristics between AMI patients and controls were tested using Student' s t-test or Fisher' s exact test.The Mann-Whitney test was conducted to compare the expression of microRNAs between the AMI patients and controls.The comparison of microRNAs expression between different intervals of AMI patients was done using Wilcoxon signed rank test.The receiver operating characteristic (ROC) curve was established to discriminate AMI patients from controls.Results The expression of plasma miR-1 was significantly increased in AMI patients (P ＜ 0.01) compared with healthy controls.The contents of the plasma miR-1 in AMI patients fell down nearly to the normal level at 14 days (P ＞ 0.05).There was no relevance between the expression of plasma miR-1 and the clinical characteristics of the study population (P ＞ 0.05).Moreover,ROC curve analyses demonstrated that miR-1 had the specificity and sensitivity for the diagnosis of early AMI,but was not superior to cTnT.Conclusions Our results showed that plasma miR-1 had the capacity in early diagnosis of early AMI,and can be biomarker for AMI,however,miR-1 is not superior to cTnT for the diagnosis of AMI.

Objective To explore the effectiveness of short segmental screw fixation and bone graft fusion on the decayed vertebral of thoracolumbar tuberculosis.Methods A total of 46 cases undergone one stage anterior debridement,interbody fusion,screw fixation on the decayed vertebral of thoracolumbar tuberculosis were retrospectively analyzed from June 2009 to November 2013.Including 25 males and 21 females,with the mean age of 39.6 years (range,13-69 years).Lesion segments:T6-L4 (segment lesions ≤ 3 segments); 3 B gradecases,6 C grade cases,4 D grade cases and 33 E grade cases assessmed by Frankel grade.The average Cobb angle of kyphosis was 16.34°±3.19° and ESR:19-81 mm/1 h preopration.CT scan and Two-dimensional reconstruction were done before operation,and the effective height of front and middle pillar of residual thoracolumbar vertebral in coronal and sagittal position were measured before operation,when the minimum effective height was higher than 10 mm,combined the intraoperative visual,the appropriate internal fixation for anterior debridement and interbody bone grafting were choosed.The cobb angle,the Frankel grade,the ESR and VAS value were compared with preoperative and postoperative.The stability and bone graft fusion were also observed.Results Fourty-six cases of patients were received followed up from 12 to 48 months,an average of 26 months.All patients with tuberculosis poisoning symptoms disappeared.The ESR:0-15 mm/1 h.Frankel rating at the end of postoperative follow-up:2 D-class cases,44 E-class cases.The VAS score (6.85± 1.22,4.49±0.95 vs.2.06±0.93) and vertebral Cobb angle (16.34°±3.19°,4.16°±2.71° vs.4.52°±1.29°) at post-operation 7 d and the last follow-up were significant lower than those at pre-operation,while the ESR (41.25±1.61 mm/1 h,17.36±6.82 mm/1 h vs.10.67±0.72 mm/1 h) was reduced to normal levelthan that of pre-operation.The comparative difference was statistically significant between pre-operative and post-operative.The fusion rate at the end of post-operative follow-up:44 excellent cases,2 good cases.Conclusion When the effective height of front and middle pillar of residual thoracolumbar vertebral in coronal and sagittal position in vertebral tuberculosis was higherthan 10mm,reliable stability and treatment efficiency were achieved with anteriorinternal fixation.