BACKGROUND:Platelet-rich plasma (PRP) containing high levels of platelet-derived growth factor for knee osteoarthritis has achieved good clinical results;however, the effects of RPR on the repair of damaged articular cartilage are stil controversial.
OBJECTIVE:To study the effects of RPR on the repair of damaged articular cartilage in a rabbit model of knee osteoarthritis.
METHODS:The model of osteoarthritis in the rabbit right knee was established by Hulth’s method. Autologous PRP (0.5 mL) (PRP group), sodium hyaluronate (0.5 mL) (sodium hyaluronate group), and normal saline (model group) were injected into the right knee joint cavity, respectively. The morphology of articular surface and nitric oxide contents in knee joint fluid were observed and determined at 8 weeks after surgery.
RESULTS AND CONCLUSION:The morphology of articular cartilage in the PRP group was better than that in the other three groups. Mankin scores of articular cartilage and nitric oxide contents of knee joint fluid in the PRP group were significantly decreased compared with the model and sodium hyaluronate groups that in (P<0.05), while increased compared with the sham-operation group (P<0.05). Our results suggest that repair effects of PRP on the damaged articular cartilage are superior to sodium hyaluronate treatment.

Objective To construct the serine protease gene(sprE)mutant and to study the pathogenicity of sprE gene of Enterococcus faecalis.Methods Recombinant suicide vector pCQ001 of Enterococcus faecalis with pTX4577,was constructed.Then,created isogenic sprE-deficient mu- tant(*sprE)by allelic replacement was constructed.Moreover,the growth ability and the virulence of the mutant were compared with those of the wide type in vitro and in vivo respectively.A mouse peritonitis model and a rabbit endocarditis model were utilized in the study.Results The *sprE was selected by kanamycin and identified by polymerase chain reaction(PCR),pulsed field gel electropho- resis(PFGE)and Southern blot.The evidences showed that the sprE gene had a major role in helping bacteria to resist the elevated temperature and oxidative stress.The virulence of mutant decreased af- ter sprE gene was knocked out.Conclusions The *sprE of Enterococcus faecalis is constructed suc- cessfully,sprE gene is important in the pathogenesis of Enterococcus faecalis,which probably is a major virulence factor of Enterococcus faecali.

Objective To investigate the treatment mechanism and effect of platelet-rich plasma(PRP) in treating rabbit knee osteoarthosis(KOA).Methods Thirty-two New Zealand adult clean class rabbits were randomly divided into the blank control group(A),model control group(B),PRP treatment group(C) and sodium hyaluronate treatment group(D).The group A conducted the simulated model construction,while the group B,C and D established the KOA rabbit model by using the Hulth method.After establishing the animal model,the group C was given PRP 0.5mLl by knee articular cavity injection,once every 3 weeks,twice in total;the group D was given sodium hyaluronate by knee articular cavity injection,once per week for 5 continuous weeks.The group A and B were injected with equal amount of normal saline at the same time point in the group C.The histological structure of articular cartilage,cell number,integrity of tidal line,and toluidine blue staining were observed by common optical microscope.The differences of Mankin′s scores were compared among various groups.The proper amount of knee joint fluid was collected for measuring the arachidonic acid expression in each group.Results The structure and morphology of articular cartilage in the group A were normal without obvious damage,while which in the group B,C and D had different degrees of damage,especially the cartilage structure in the group B had greater changes.Although the group B and C had the morphological and structure change of articular cartilage,but which was close to the cartilage structure in the group A.The Mankin′s score in the group A was lowest,while which in the group B was highest,which in the group C and D was significantly decreased after intervention treatment;the difference between the group B with the group C and D had statistical significance(P<0.05).The difference between the group C and D had statistical significance(P<0.05).The arachidonic acid level in the group A was lowest and which in the group B was highest,which in the group C and group D ranged between the group A and B,moreover the group C was lower than the group D (P<0.05).Conclusion PRP has obvious therapeutic and alleviated effect in treating KOA.

BACKGROUND: As a minimally invasive technology, percutaneous vertebroplasty is a safe and effective treatment for osteoporotic vertebral compression fractures.OBJECTIVE: To overview the research progress concerning the biomechanical properties, bone strength maintenance, bone absorption and degradation of bone filling materials used in percutaneous vertebroplasty.METHODS: The first author conducted a computer-based retrieval of CNKI, PubMed and Medline databases for relevant articles published from January 2005 to May 2016. The keywords were bone cement, bone filling materials, percutaneous vertebroplasty in English and Chinese, respectively.RESULTS AND CONCLUSION: Polymethyl methacrylate is not an ideal material for osteoporotic vertebral compression fractures. Calcium phosphate cement and calcium sulfate cement can replace the traditional polymethyl methacrylate; however, some problems still exist, such as poor effect of venography, incontrollable biological degradation rate, and lack of the evidence-based medicine about its long-term effect. Composite bone cement, as a good bone repair material, holds the advantages of various bone cements. As the composite bone cement has just been introduced in clinical practice, its long-term curative efficacy needs to be further studied.

The prescriptions containing pericarpium citri reticulatae that built by Professor. Yan were collected to build a database based on traditional Chinese medicine (TCM) inheritance assist system. After analyzed by data mining, such as apriori algorithm, the frequency of single medicine, the frequency of drug combination, the association rules between drugs and core drug combinations can be get from the database. Through the analysis of 1 027 prescriptions with pericarpium citri reticulatae, these prescriptions were commonly used to treat stomach aches, cough and other syndromes. The most frequency drug combinations were "Citri Reticulatae Pericarpium-Poria", "Paeoniae Radix Rubra-Citri Reticulatae Pericarpium" and so on. The drug association rules that the confidence was 1 were "Glycyrrhizae Radix ex Rhizoma --> Citri Reticulatae Pericarpium", "Paeoniae Alba Radix-Cyperi Rhizoma --> Citri Reticulatae Pericarpium", "Poria --> Citri Reticulatae Pericarpium", and so on. The drugs in the prescriptions containing pericarpium citri reticulatae that built by Professor Yan mostly had the effects of regulating the flow of Qi and invigorate blood circulation, which reflected the clearly thought when making prescriptions.
Citrus ; chemistry ; Data Mining ; Drug Interactions ; Drug Prescriptions ; Drug Therapy, Combination ; Drugs, Chinese Herbal ; pharmacology ; Humans ; Practice Patterns, Physicians'

Objective: To obtain the bFGF mimic peptide binding to FGFR via phage display, and to provide the base for developing peptide agonist of bFGF. Methods: Using Balb/c 3T3 cells as the target cells and COS-7 cells as the subtractive panning, the phage display heptapeptide library was biopanned for 4 rounds to obtain the single phage clones. The affinity and the specificity of the clones were assessed by ELISA. DNA sequencing was applied to further analyze the positive clones. Results: Twelve positive clones were selected from the enriched phages. A group of hydrophobic peptides containing a conserved motif, PR, was identified. Conclusion: Two bFGF mimic heptapeptides binding to FGFR were selected, which may be used as the candidates for bFGF agonist.

Air Pollutants, Occupational ; adverse effects ; analysis ; Dust ; analysis ; Environmental Monitoring ; instrumentation ; methods ; Humans ; Industry ; Inhalation Exposure ; statistics & numerical data ; Maximum Allowable Concentration ; Occupational Exposure ; statistics & numerical data ; Quartz

In this paper, the new carbon nanotube modified glassy carbon electrode (F-CNTs/GCE) was prepared to establish a new method for studying the molecular interaction mechanism between baicalin metal complexes (BMC) and bovine serum album (BSA), and the principle of this method was discussed deeply. Under the physiological condition, the thermodynamics and kinetics properties of interaction between BMC and BSA were studied by cyclic voltammetry (CV) to inference their molecular effective mechanism. The results show that the presence of F-CNTs can accelerate the electron transfer, and better response signal was showed in the BMC/BMC-BSA system. The detection of interaction of BMC-BSA used new method show that BMC-BSA generates stable thermodynamically non-covalent compounds, and the obtained average binding sites of BMC-BSA were 1.7; the number of electron transfer in BMC/BMC-BSA reaction process was 2, and non electroactive supramolecular compounds of BMC-BSA were generated by this interacting reaction. The relevant research work provides a new way to study the molecular mechanism for the interaction of drugs with protein, and with a certain reference value for discussion on the non covalent interactions.
Animals ; Cattle ; Coordination Complexes ; chemistry ; Electrodes ; Flavonoids ; chemistry ; Kinetics ; Nanotubes, Carbon ; Serum Albumin, Bovine ; chemistry ; Thermodynamics

N-Benzyl matrinol was obtained by hydrolysis, benzylation and reduction reaction from matrine. A series of hybrids (8a-8n) from (phenylsulfonyl)furoxan and N-benzyl matrinol were synthesized and biologically evaluated as anti-hepatocellular carcinoma agents. All target compounds were evaluated for anti-proliferative activity against human hepatocellular Bel-7402, SMMC-7721, Bel-7404, and HepG2 cells in vitro by MTT method. The results indicated that all of these compounds had potent anti-proliferative activity which were more potent than their parent compound and 5-FU, especially 8a-8h and 8j showed the strongest anti-HCC HepG2 cell activity with IC50 values of 0.12-0.93 μmol x L(-1).
Antineoplastic Agents ; pharmacology ; Carcinoma, Hepatocellular ; Fluorouracil ; Hep G2 Cells ; Humans ; Liver Neoplasms ; Oxadiazoles ; pharmacology

This study aimed to investigate the transport characteristics of aripiprazole. A human intestinal epithelial cell model Caco-2 cell in vitro cultured had been applied to study the transport of aripiprazole. The effects of time, concentration of donor solutions, pH, temperature and P-glycoprotein inhibitor on the transport of aripiprazole were investigated. The determination of aripiprazole was performed by HPLC. It is concluded that aripiprazole is transported through the intestinal mucosa via a passive diffusion mechanism primarily, coexisting with a carrier-mediated transport. The transport of aripiprazole is positively correlated to transport time, pH, and temperature. Papp increased with donor concentrations up to 10 microg x mL(-1), and then decreased for higher concentrations. The P-glycoprotein inhibitor cyclosporine A significantly enhanced the transport amount of aripiprazole.
ATP-Binding Cassette, Sub-Family B, Member 1 ; antagonists & inhibitors ; Antipsychotic Agents ; administration & dosage ; pharmacokinetics ; Aripiprazole ; Biological Transport ; drug effects ; Caco-2 Cells ; Cyclosporine ; pharmacology ; Dose-Response Relationship, Drug ; Humans ; Hydrogen-Ion Concentration ; Piperazines ; administration & dosage ; pharmacokinetics ; Quinolones ; administration & dosage ; pharmacokinetics ; Temperature ; Time Factors