Objective To investigate the effects of sensorimotor therapy on patients with knee osteoarthritis.Methods Ninety-two patients with knee osteoarthritis were divided into a treatment group and a control group by using random digits table. Both groups received conventional rehabilitation therapy, including knee isometric and isotonic contraction training, ultrashort wave diathermy as well as aerobic exercise. The treatment group was also administered with sensorimotor training, in addition to the conventional training,including the muscle strengthening and control training of quadriceps and hamstring muscle using sling exercise therapy system and on the Thera-band mattress. The visual analogue scale (VAS) for pain, manual muscle testing and knee range of motion as well as the Japanese Orthopedic Association knee function evaluation form were used to evaluate the patients. Results There was no statistic difference between the 2 groups before treatment, with regard to the evaluation parameters used in this study. After 2 months of treatment, both groups improved significantly (P ＜0.05),with the treatment group improved to a significantly greater extent (P ＜0.05). Conclusions Sensorimotor training in addition to the conventional rehabilitation treatment can further relieve the pain of patients with knee osteoarthritis joints arthritis and improve the function of patients with knee osteoarthritis.

BACKGROUND:Differentiation of growth factor-induced cells into fibrocartilage is the hot topic in the research of meniscus tissue engineering. The in vitro construction and in vivo reconstruction of menisci are closely related with the effect of growth factors. OBJECTIVE:To review the current development of growth factors in meniscus tissue engineering, and to investigate the mechanism. METHODS:The VIP database (http://lib.cqvip.com), CNKI database (www.cnki.net) and PubMed database (http://www.ncbi.nlm.nih.gov/pubmed) were retrieved for the related articles from January 2008 to March 2013 with the key words of“meniscus tissue engineering, cartilage, growth factors”. A total of 53 articles on the research of growth factors in meniscus tissue engineering were included. RESULTS AND CONCLUSION:There were various growth factors in cartilage tissue engineering research, and the new growth factors have been found in the constant. The research on the regulation effect of growth factors on cartilage was changed from the research of single growth factor model to the research of the interactions between multiple growth factors;the molecular mechanisms of growth factors in regulating the cartilage have also been extensively studied. Growth factors have good application prospects in tissue engineering, but there are stil many problems to be solved, such as during the healing of menisci, the expressions and the effect of different growth factors are different in different time points. So how to play the interaction between growth factors timely and appropriately thus stimulating the in vivo microenvironment, investigating the molecular mechanisms of growth factors in regulating the cartilage, as wel as finding the new growth factors are the research focus in meniscus tissue engineering.

Objective This article is aim to test the safety and the in vitro antibacterial activity of the Lentiviral-nedicated humanβ-defensin 3 (hβD-3) transfecion synovium-derived mesenchymal stem cells (SMSCs).Methods Tissues with SMSCs were obtained by surgical operations.Cells were explant cultured and purified by magnetic cell separation system.Cells were identified by microscopic observation, immunofluorescence and cell surface markers.Through inducing the cells into fat, osteoblasts and chondroblasts to respectively determine the multi-directional differentiation potential.Construct a hβD-3 contained lentivirus and transfected into SMSCs.Got the cell growth curve and determine the DNA content by using flow cytometry.The NOD/SCID mice were applied to verify the tumorigenicity of SMSCs.Agar diffusion test was applied to doing antibacterial activity test of posttransfecton SMSCs.The rabbit model of knee joint in staphylococcus aureus infections verify its bacteriostatic action in vivo.Results: Purified SMSCs had the structure and surface signatures of MSCs.It had the potential of multi-differentiation.Immunofluorescence had verified that SMSCs transfected by lentivirus could stably express hβD-3.Cell proliferation kinetics, karyotype analysis and Tumorigenic type analysis verified the safety of SMSCs after transfection.The in vivo and vitro antibacterial activity test of the recombinant SMSCs showed that after cell passages, the subcultured SMSCs (P5 cells were used in this article) could express hβD-3 stably and had antibacterial activity.The result of the antibacterial circle showed that low concentration group inhibit bacterial activity while the medium and high group could enlarge compared with the negative and positive control group.Conclusion Lentiviral-medicated hβD-3 gene express SMSCs could successfully subcultured and stably express hβD-3, meanwhile it had apparent in vitro antibacterial activity.

BACKGROUND:A large amount of studies have confirmed that synovial mesenchymal stem cells have the similarity in cellmorphology, immune phenotype, colony forming ability and differentiation potential with bone marrow mesenchymal stem cells. But bone marrow mesenchymal stem cells are better than synovial mesenchymal stem cells in the ability to differentiate into cartilages. OBJECTIVE:To discuss the possibility of using synovial mesenchymal stem cells as seed cells for meniscal tissue engineering. METHODS:The synovial mesenchymal stem cells were isolated from rabbit synovial tissues with limiting dilution monoclonal culture method, and then the cells were purified. The morphology, ultrastructure, molecular phenotype, proliferation kinetics, karyotype and tumorigenicity of the in vitro cultured cells were analyzed. RESULTS AND CONCLUSION:The synovial mesenchymal stem cells isolated from the rabbit synovial cells had high proliferation capacity during in vitro monolayer culture. The synovial mesenchymal stem cells grew to peak at 6 days, and the doubling time was (30.2±2.4) hours. Flow cytometry results showed the synovial mesenchymal stem cells could express some molecular makers of mesenchymal stem cells, such as CD44 and CD90. DNA contents check, karyotype test and oncogenicity test confirmed isolated and purified synovial mesenchymal stem cells were the normal diploid cells without tumorigenicity, so the cells can be used as seed cells for meniscal tissue engineering.

BACKGROUND:Smal intestinal submucosa is characterized as antimicrobial activity, good biocompatibility, bio-mechanical properties, and rapid degradation in vivo, similar to the extracellular matrix of meniscal
fibrochondrocytes.
OBJECTIVE:To observe whether there exists a good histocompatibility between smal intestinal submucosa and synovial mesenchymal stem cells.
METHODS:Smal intestinal submucosa was treated with physical and chemical treatment. And hematoxylin-eosin staining and scanning electron microscopy observation were performed. Then, smal intestinal submucosa extracts were prepared for the fol owing experiments. (1) Pyrogenic test:smal intestinal submucosa extracts were injected into the ear vein of New Zealand white rabbits. (2) Skin sensitization test:smal intestinal submucosa extracts, paraformaldehyde solution and normal saline were respectively injected intradermal y into New Zealand white rabbits. (3) General toxicity test:smal intestinal submucosa extracts and normal saline were respectively injected into the ear vein of New Zealand white rabbits. Smal intestinal submucosa was co-cultured with osteogenic rabbit synovial mesenchymal stem cells, and smal intestinal submucosa cultured alone served as control. RESULTS AND CONCLUSION:There were some intestinal mucosal epithelial cells, fat cells and other cells adhered onto the surface of smal intestinal submucosa after physical treatment. While, the amount of residual cells decreased sharply after chemical treatment. But the main structure and the component had not been changed. The surface of smal intestinal submucosa was smooth and no cells remained, and there was a three-dimension network spatial structure. The porosity was 80%. Smal intestinal submucosa is a non-toxic, nonirritating, non-immunogenic biomaterial with very good biocompatibility, which has a good histocompatibility with rabbit synovial mesenchymal stem cells.

Objective:To estimate the pharmacokinetics for two solution types of propofol glycoside in-jections in rats .Methods:A high performance liquid chromatography-high resolution mass spectrometry ( HPLC-MS) was established for measuring propofol in rat plasma .Two kinds of propofol glycoside injec-tions were developed and intravenously administered to rats via tail vein , respectively , and a commercial-ly available propofol emulsion injection was intravenously administered as a control .Propofol plasma concentration-time curves were determined , and the pharmacokinetic parameters were estimated .Re-sults:HPLC-MS measurement was performed by using a quadrupole-orbit trap high-resolution mass spec-trometer on a C18 chromatographic column.The mobile phase consisted of water and methanol (20∶80, V/V) .The ion source was an atmospheric pressure chemical ion source , and the negative ion was used for detection with a scanning mode of selective ion monitoring in which m/z 177.127 4 was used for propofol and m/z 149.096 1 used for thymol as an internal standard .A linear correlation between con-centration and peak area ratio was constructed in the range of 50 μg/L-10.0 mg/L propofol.The limit of quantification was 50μg/L propofol .The average recoveries of propofol from plasma were in the range of 93.6% -101.1%, and intra-day or inter-day relative standard deviation for measurement was <14%.The pharmacokinetic results showed that the two kinds of propofol glycoside injections exhibited the same pharmacokinetic behavior .However, the clearance and area under curve values of propofol for the two propofol glycoside injections were evidently increased as compared with those for propofol emulsion injection, respectively.Furthermore, their apparent distribution volumes were increased as well .Never-theless, the propofol elimination half-life (t1/2) value of the newly developed propofol glycoside injections was the same as that of commercial propofol emulsion injection (approximately 1.5 h).Conclusion:The established HPLC-MS method can be used for measuring propofol concentration accurately in rat plasma . The clearance and distribution volumes of propofol glycoside injection are bigger than those of the propofol emulsion injection .

Objective To investigate the impact of surgical resection on patients with Ⅱ-Ⅲ A stage small cell lung carcinoma (SCLC). Method Data of 61 in-patients who diagnosed as Ⅱ-ⅢA stage SCLC from Jan 1st 2009 to Feb 1st 2014 were analyzed. 23 patients underwent surgical resections were enrolled as the treatment group, while 38 patients without surgical resection were enrolled as the control group. Disease progression was confirmed by monthly examination. The grouping is balanced by propensity score match. The progression-free survival (PFS) time and overall survival(OS) were analyzed with Kaplan-Meier survival method and Cox regression is applied to analyze the covariates. Fisher's exact test was applied to compare one-year survival rate and two-year survival rate. Results The PFS and OS of the treatment group is longer than that of the control group (P < 0.05). Both one-year and two-year survival rates of the treatment group outnumber those of the control group (P < 0.05). Cox regression indicates that surgical resection is an independent prognostic factor (P < 0.05). Conclusion Surgical resection on tolerable patients with stage Ⅱ-Ⅲ A small-cell lung carcinoma is effective on improving the progression-free survival time,one-year and two-year survival rates,and also shows a propensity of a higher overall survival time.

Objective To investigate the consistency in 18F-deoxyglucose positron emission tomography (18F-FDG PET-CT) examination and histopathological analyses in the diagnoses of resectable lung tumors. Methods Retrospective reviews over the clinical data of lung tumor patients by preoperative PET-CT diagnosis and postoperative histopathological diagnosis were conducted to investigate the effects of the two diagnostic methods in terms of lung tumor properties , mediastinal lymph node metastasis , and pulmonary hilar lymph node metastasis. Results The diagnoses by preoperative PET-CT was consistent in differentiation of non-malignancy and malignancy of pathologic lung tumors by 87.3%, at a medium level (κ = 0.401, P < 0.001). McNemar test showed P = 0.508, indicating the two diagnostic methods were insignificantly different in the diagnosis of pulmonary tumors. The preoperative PET-CT was consistent in the diagnosis of the metastasis of pathologic mediastinal lymph node by 85.9%, at a medium level (κ = 0.697, P < 0.001). McNemar test showed P =0.754, indicating no significant difference between the diagnostic methods. The preoperative PET-CT was consistent with postoperative pathological examinations in the differentiations of the metastasis of pulmonary and hilar lymph node by 77.4%, at a medium level (κ=0.523, P < 0.001). McNemar test showed P = 0.454, indicating the two diagnostic methods were no significantly different. Conclusion Preoperative PET-CT and histopathologic examinations may be consistent in lung tumor diagnosis , which provides a basis for a certain significance in the surgical options.

Objective To explore the differences of the joint function and the patient's satisfaction between two different methods to reconstruct limb length for unilateral Crowe Ⅳ developmental dysplasia of the hip (DDH).Methods The clinical controlled study were used.21 cases with unilateral DDH Crowe Ⅳ treated with total hip arthroplasty were divided into 2 groups randomly.The patients in the first group were reconstructed the limb with the compensatory length and those in the second group were did with the real length.The patients were followed up 10 years.Two independent sample t-test was used to compare these two operations.Harris scores and SF-36 scores were used in the test.Survival analysis with Kaplan-Meier method was involved in the survival of the prosthesis and then test with Log-rank test.X-ray films of different period were compared to confirm the prosthetic loosening.Results Seventeen patients were followed up 8-10 years.There were no significant differences both in Harris score and most of the SF-36 scores at the median follow-up of 10 years.The item mental healthy of SF-36 expressed significant difference.Five patients required revision.There were 10 cases suffered with polyethylene wear,6 cases with severe osteoporosis in greater trochanter,and 3 cases with osteolytic reaction.Conclusion There are no significant differences between the two surgical method in the survival rate of prosthesis and the joint function in the median follow up.The satisfaction of the control groups is lower than the trial groups both at the early stage after the operation and the median follow up.The revision rate between the two groups is similar but the reason is different.

Objective To investigate the biosecurity and biocompatibility of small intestinal submucosa (SIS) as scaffold for tissue engineering and to explore the possibility to induce synovial mesenchymal stem cells (SMSCs) differentiate into cartilage with SIS as the scaffold and SMSCs as the seed cells. Methods The SMSCs were isolated and cultured from the synovial mem-brane of knee joints of rabbits by a conventional method. The SIS was harvested from pigs according to the physical method and Abraham's method. 4 rabbits are divided into the experimental group and control group. The biosecurity of SIS as scaf-folds were investigated in pyrogen test, skin sensitization test and systemic toxicity test. The SMSCs and SIS were co-cultured in vitro and induced to differentiate into cartilage to explore the biocompatibility of SMSCs and SIS, the proliferation and differ-entiation ability of SMSCs on the scaffold of SIS. The varietyies were identified by the microscope. Results The SIS isolated with the physical method and Abraham's method is a milky and translucent membrane with a smooth surface. Under the electron microscope, SIS presented a porous Stereoscopic three-dimensional network structure, which is formed by fibrous tissues' intertex-ture. Its' porosity was about 80%and its aperture was 100-200μm. Meanwhile, the biosecurity and biocompatibility of SIS were also fine. In the trial that the SMSCs and SIS were co-cultured in vitro, the SMSCs can grow, adhere to and differentiate on the sur-face of SIS and into the hollows very well. It can also secrete extracellular matrix. Through scanning microscope observation, cells contact with each other by their neuritis, or adhered to the wall of hole by cellular protrution. On the surface of SIS, the SMSCs maintain the property that it can easily differentiate into the chondrogenic lineage in the chondrogenic medium. Immunochemistry staining showed positive expression of type II collagen post 21 days of co-cultrue. Conclusion SIS can be used as the scaffold to construct tissue engineering meniscus as it has good biosecurity and biocompatibility with SMSCs without disturbing the cell form or inhibiting the growth and function of SMSCs.