Objective To investigate the correlation of serum lipoprotein(a)[Lp(a)]level and coronary artery lesion degree in elderly coronary heart disease (CAD) patients with type 2 diabetes mellitus.Methods 163 elderly patients with CAD in accordance with the control fasting glucose(FPG)levels on admission were divided into A,B,C three groups:FPG <6.1 mmol/L for group A(50 cases);6.1 mmol/L≤FPG <7.0 mmol/L for group B (69 cases);FPG >7.1 mmol/L for group C (44 cases).The clinical data,count in patients with coronary artery lesions and lesion severity index(Gensini score),blood lipid and lipoprotein(a)[Lp(a)],etc were recorded.Results There was significant difference in serum Lp(a)among three groups(F =21.577,P <0.001),the Lp(a)of group C [(413.5 ±63.1)mmol/L]was higher than group B[(376.3 ±58.3)mmol/L],group B was higher than group C [(335.3 ±52.5 )mmol/L].The differences of serum Lp (a)between coronary lesion groups were statistically significant(F =69.447,P <0.001),three lesion group Lp(a)[(436.6 ±60.2)mmol/L]was higher than the double branch lesions[(362.5 ±55.7 )mmol/L],double branch lesion group was higher than the single lesion group [(315.4 ±49.9)mmol/L];Gensini score between different coronary lesions group had significant differences (F =179.969,P <0.001),three lesion group Gensini score[(61.9 ±15.4)points]was higher than double branch lesion group[(34.3 ±12.5 )points],double branch lesion group was higher than the single lesion group [(17.2 ± 9.1)points];Lp(a)≥372.3 mmol/L group Gensini score[(58.4 ±12.5)points]was significantly higher than the Lp(a)<372.3 mmol/L group[(19.2 ±10.3)points](t =21.836,P <0.01);Lp(a)≥372.3 mmol/L group three lesions proportion(57.3%)was significantly higher than 18.5% of Lp(a)<372.3 mmol/L group(χ2 =37.142, P <0.001);Pearson correlation analysis showed that the serum level of Lp(a)was positively related with Gensini score(r =0.439,P <0.001 );Multiple linear regression analysis showed that the Lp(a)was the independent risk factors affecting the Gensini score(β=4.210,P <0.001).Conclusion In elderly patients with CAD 2 diabetes significantly higher serum levels of Lp(a),the higher level is closely related to the severity of coronary lesions,and can be used as an independent predictor of coronary artery lesion severity.

BACKGROUND:Currently, there is no uniform, standardized approach to isolate, purify and proliferate bone marrow mesenchymal stem cells. Chlormethylbenzamido-1,1'-dioctadecyl-3,3,3',3'-tetramethylindocarbocyanine (CM-Dil) is a stable, reliable, high marking and simple marker.
OBJECTIVE:To develop the methods for isolation, culture and identification of rat bone marrow mesenchymal stem cells in vitro.
METHODS:Two male Sprague-Dawley rats, weighing 50-100 g were taken to col ect the bilateral femur and tibia bone marrow under sterile conditions, and then, primary bone marrow mesenchymal stem cells were isolated and cultured using bone marrow adherent separation and density gradient centrifugation. cells were amplified and purified through timely and repeated passage, and labeled at the third generation with fluorescent dyes CM-Dil in vitro as a source of donor cells.
RESULTS AND CONCLUSION:Bone marrow mesenchymal stem cells were cultured successful y in vitro using bone marrow adherent separation and density gradient centrifugation separation methods, but the former was superior to the latter in the number of cultured cells significantly, while the two methods were not different significantly in terms of cellviability and proliferation. Flow cytometry results showed that the positive rates of cultured cells were 17.5%for CD34, 97.9%for CD44, and 91%for CD90. CM-Dil can label bone marrow mesenchymal stem cells successful y, which is a stable, reliable, high marking and simple marker.

Objective: To investigate whether bcl-2 directly contributes to the development of drug resistance and apoptosis in o- varian cancer cell lines cells OC3. Methods: Retrovirus expression cector pLXSN-bcl-2 was constructed and was transfected to ovarian cancer cell line cells OC3 using Lipofectin,with empty vector pLXSN as a control. bcl-2 expession of transfected cells was analyzed by FACS and Western blot and Adr-induced cytotoxicity was measured by MTT assay. Apoptosis was also detected by PI DNA staining and DNA Ladder analysis.Results:pLXSN/bcl-2 transfected cells OC3/bcl-2 overexpressed bcl-2 and were resistant to Adr-induced cytotoxicity.The ability against Adr-induced apoptosis was increased. Conclusion: bcl-2 may play an important role in the resistance to Adr-inducing apoptosis, thereby increasing resistance of OC3/bcl-2 cells to chemotherapy.

BACKGROUND:A great development has been achieved in essential research on tissue engineered cartilage. However, its real application in otolaryngology has been rarely reported. It is faced with the topic to explore the simple and convenient method of repairing laryngeal cartilage by tissue engineering technique. OBJECTIVE:To compare the effect of porous spongy poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) seeded with chondrocytes or using senior tissue engineered cartilage in repairing al ogenic thyroid cartilage defects.METHODS:Chondrocytes at passage 3 were harvested from infant rabbits within 3 days. Porous spongy poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) seeded with chondrocytes composites were made by tissue engineering technique. The chondrocyte-poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) composites were co-cultured in vitro to form junior tissue engineered cartilage. And then respectively used for repairing the thyroid cartilage defects and directly transplanted with junior tissue engineered cartilage (experimental group A, n=5), or firstly the junior tissue engineered cartilage to be implanted subcutaneously for a period of time to further maturity for relative senior tissue engineered cartilage and secondly to be transplanted (experimental group B, n=5) into adult New Zealand white rabbits. Simple poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) sponge scaffold (control group A, n=4) and chondrocyte suspensions(control group B, n=4) were used as reparative materials in defect areas as control groups. Final y, the reparative effect was respectively studied grossly and histological y at 4 weeks (experimental group B) and 8 weeks (experimental group A, control group A and control group B) after transplantation. RESULTS AND CONCLUSION:The cartilage defects were wel repaired in the experimental groups. It was smooth between the reparative area and original cartilage without dents and defects. Both were similar grossly. But few chondrocytes at interfacial region between the reparative area and original cartilage and poor matrices were observed in the experimental group A. A Few chondrocytes and more matrices were observed in the experimental group B. Inflammatory cellinfiltration was not obvious in two experimental groups. Control groups showed soft tissue of dark-red color accompanied with local concave in gross specimens. Histological examination and special staining showed there were no cartilage-like structure and secretion of matrix components. The results showed that it is possible to repair thyroid cartilage defect using junior tissue engineered cartilage directly or junior tissue engineered cartilage after in vitro implantation in al ograft rabbits with immunity, and the immunoreaction is not obvious;in the same period, the repairing effect of mature tissue engineered cartilage is better than that of junior tissue engineered cartilage. However, application of junior tissue engineered cartilage directly can save time, costs, workload and operational link, and avoid the pain from secondary skin surgery, which is one of the more practical approaches.

Objective To evaluate two methods of selecting region of interest (ROI)to measure the apparent diffusion coefficient (ADC)of breast lesions on diffusion-weighted imaging (DWI).Methods MRI findings (including plain MRI,dynamic contrast-en-hanced MRI and DWI)of 5 3 cases with breast mass confirmed by pathology were analyzed retrospectively.Two observers independ-ently measured the ADC of breast lesions by the method of fixed ROI with the size of 10 mm2 ±2 mm2 and the routine method.The mean ADCs of benign and malignant breast lesions were compared between two methods and two observers by using paired samples T-test.The values of ADC diagnosing breast cancer were compared between the two methods by using the receiver operating charac-teristic (ROC)curve.Results Among 62 lesions of 53 cases,33 lesions were malignant,and 29 lesions were benign.For the first observer,the mean ADCs of benign and malignant lesions were (1.647±0.359)×10-3 mm2/s and (1.136±0.227)×10-3 mm2/s measured by the fixed ROI method,respectively.The area under the ROC was 0.897.The mean ADCs of benign and malignant le-sions were (1.603±0.415)×10-3mm2/s and (1.251±0.237)×10-3 mm2/s measured by the routine method,respectively.The area under the ROC was 0.768.For another observer,the mean ADCs of benign and malignant lesions were (1.647±0.357)× 10-3 mm2/s and (1.130±0.250)×10-3 mm2/s measured by the fixed ROI method,respectively.The mean ADCs of benign and malignant lesions were (1.590± 0.390)×10-3 mm2/s and (1.250±0.237)×10-3 mm2/s measured by the routine method,respec-tively.There was no significant difference for the mean ADC of benign lesions between the two methods.However,there was sig-nificant difference for the mean ADC of malignant lesions between the two methods.The diagnostic value of ADC measured by the fixing method was better than that of the routine method (P=0.008).There were no significant differences for ADCs of benign and malignant lesions between the two observers.Conclusion DWI has an important value for differential diagnosis of benign and malignant breast lesions.The measurement of ADC by the fixed and smaller ROI is better than that by the routine ROI for dis-tinguishing malignant from benign breast lesions.

BACKGROUND:Atorvastatin has been shown to reduce bone loss and fracture, but its effects on implant osseointegration remain unknown.
OBJECTIVE:To investigate the effects of atorvastatin on implant osseointegration in osteoporotic rats and the underlying mechanisms.
METHODS:Forty-eight Sprague-Dawley rats were randomized into sham-surgery, ovariectomy, and atorvastatin (10 and 20 mg/kg per day) treatment groups, respectively. Al rats received ovariectomy and implant surgery except those in the sham-surgery group. Bone mineral density of the lumbar vertebra, osseointegration ratio and pul-out strength of implants were measured after 12-week treatment.Levels of bone formation and resorption markers in osteoblasts treated with atorvastatin were determined by ELISA. Wnt pathway-relatedgene expression was detected by RT-PCR.
RESULTS AND CONCLUSION:Bone mineral density, osseointegration ratio and pul-out strength of implants were significantly increased in 20 mg/kg per day of atorvastatin treatment group compared with ovariectomy group (P< 0.05). Levels of alkaline phosphatase, osteocalcinand osteoprotegerinwere significantly increased in osteoblasts treated with atorvastatinin vitro(P<0 .05), and the level of osteoclast differentiation factor RANKL was significantly inhibited (P< 0.05). Meanwhile, atorvastatin significantly promoted the mRNA expression of low-density lipoprotein associated protein 5and β-catenin, and inhibited the mRNA expression of dickkopfWnt signal pathway inhibitor 1and sclerostin. Our results suggest that atorvastatin promotes implant osseointegration in osteoporotic rats by activating Wnt/β-catenin signal pathway.

ObjectiveTo evaluate the clinical curative effect and security by performing the clinical study ofYinggencao formula in treatment of psoriasis vulgaris with blood-heat TCM syndrome.MethodsA total of 75 patients, diagnosed with Psoriasis Vulgaris Blood-heat RCM syndrome, were randomizedly divided into the treatmeat group with 39 patients and the control group with 36. The treatment group tookYinggencao formula twice daily, while the control group tookQingdai capsules three times daily. All the patients were treated 12 weeks. PASI scores were used as the main outcome and to estimate the curative effect rates.ResultsThe PASI scores of patients in the treatment group (6.97 ± 2.02vs. 16.88 ± 2.91;t=14.380,P=0.009) and the control group (13.14 ± 3.18vs. 17.49 ± 2.32;t=7.780,P=0.013) after treatment showed significantly lower than the scores before. The PASI scores showed significant difference between the two groups after the treatment (P=0.027). The total effective rate of treatment group was significantly higher than the control group (76.9%vs. 61.1%;χ2=5.120, P<0.05).Conclusions TheYinggencao formula therapy showed better effect thanQingdai capsules therapy in treatment of psoriasis vulgaris with blood-heat TCM syndrome.

Objective TostudythevalueofquantitativeparametersofDCE-MRIandthreedimensionalarterialspinlabeling(3D-ASL) inpreoperativegliomagrading.Methods 70patientsdiagnosedpathologicallywithinitialgliomawereassessedretrospectively,including 32caseswithlow-gradeglioma(LGG)and38caseswithhigh-gradeglioma(HGG).Allpatientsunderwentconventional,enhanced, DCEand3D-ASL MRIat3.0Tbeforesurgery.TheparametricvaluesofDCEsuchasvolumetransferconstant(Ktrans),extravascular extracellularspacevolumefraction(Ve),therateconstant(Kep),fractionalplasmavolume(Vp),cerebralbloodflow (CBF)andcerebral bloodvolume(CBV)wereobtainedbycorrespondingpost-processingsoftware.ThecerebralbloodflowofASL (ASL-CBF)wasalso obtained.Ttestoftwoindependentsampleswasusedtoanalyzewhetherthemaximumandaveragevaluesofeachparameterwere statisticallydifferentbetweenLGGand HGG.Thediagnosticaccuracyofdifferenttechniqueforgliomagradingwasdeterminedby ROCcurveanalysis.Results ThemaximumvaluesofDCE-Ktrans,Ve,rCBVandmaximumvalueofASL-rCBFwerestatisticallydifferent betweentheHGGandLGG (P＜0.05).AlltheparametricaveragevalueswerestatisticallydifferentbetweentheHGGandLGG (P＜0.05).ThemaximumandaveragevaluesofKtranshadarelativelyhighestdiagnosticefficiencyinallparameters,withtheAUCwere0.986 and0.971,theoptimumthresholdwere0.264and0.068,thesensitivitywere93.3%and94.1%,andthespecificitywere100%and 100%,respectively.ThemaximumvaluesofVe,rCBV,ASL-rCBFandtheaveragevaluesofallparametershadarelativelyhigher diagnosticefficiency.Conclusion ThemaximumvaluesofKtrans,VeandrCBFofDCE,themaximumvalueofASL-rCBFandtheaverage valueofeachparameterwereusefultodistinguishbetweenLGGand HGG.ThemaximumandaveragevaluesofKtransarethebest parametersforidentifyingHGGandLGG.

Objective To explore the protective effects of rutin against learning and memory impairment induced by trimethyltin (TMT) and investigate the possible mechanism. Methods Forty 6- to 9-week-old male BALB/c mice were randomized equally into saline group (control), TMT group, TMT+rutin group, and rutin group. Mouse models of learning and memory impairment were establish by acute TMT (2.25 mg/kg) exposure. In TMT+rutin and rutin treatment groups, the mice received intraperitioneal injection of rutin (10 mg/kg) for 1 week before TMT exposure. Twenty-four hours after TMT exposure, Morris water maze test was employed to test the escape latency of the mice, and the synaptophysin expression in the hippocampus and cortex were analyzed by Western blotting. Results Compared that in TMT group, the escape latency of the mice in water maze test was significantly shorter in the other 3 groups (P<0.05);the escape latency in TMT+rutin group was similar with that in the control and rutin groups (P>0.05). Western blotting showed significantly decreased synaptophysin expression in the hippocampus and cortex in TMT group (P<0.05); synaptophysin expression in TMT+rutin group increased significantly compared with that in TMT group (P<0.05) but showed no statistical significance from that in rutin and control groups (P>0.05). Conclusion Rutin pretreatment offers protective effect against TMT- induced learning and memory impairment in mice possibly by antagonizing decreased synaptophysin in the hippocampus and cortex.

Objective To explore the protective effects of rutin against learning and memory impairment induced by trimethyltin (TMT) and investigate the possible mechanism. Methods Forty 6- to 9-week-old male BALB/c mice were randomized equally into saline group (control), TMT group, TMT+rutin group, and rutin group. Mouse models of learning and memory impairment were establish by acute TMT (2.25 mg/kg) exposure. In TMT+rutin and rutin treatment groups, the mice received intraperitioneal injection of rutin (10 mg/kg) for 1 week before TMT exposure. Twenty-four hours after TMT exposure, Morris water maze test was employed to test the escape latency of the mice, and the synaptophysin expression in the hippocampus and cortex were analyzed by Western blotting. Results Compared that in TMT group, the escape latency of the mice in water maze test was significantly shorter in the other 3 groups (P<0.05);the escape latency in TMT+rutin group was similar with that in the control and rutin groups (P>0.05). Western blotting showed significantly decreased synaptophysin expression in the hippocampus and cortex in TMT group (P<0.05); synaptophysin expression in TMT+rutin group increased significantly compared with that in TMT group (P<0.05) but showed no statistical significance from that in rutin and control groups (P>0.05). Conclusion Rutin pretreatment offers protective effect against TMT- induced learning and memory impairment in mice possibly by antagonizing decreased synaptophysin in the hippocampus and cortex.