Objective To use an improved technique to construct the recombinant adeno-associated virus 2 (rAAV2) mediated gene which can transfer human tissue inhibitor of metalloproteinase-1 (TIMP1). Methods Human TIMP1 gene was amplified from pDNR-LIB plasmid by PCR and cloned into the rAAV2 vector pSNAV to recombinant pSNAV-TIMP1, then was transferred into BHK-21 cells by means of lipofectamine. Using G418 selection, a mixed cell named BHK-21/rAAV2-TIMP1 was isolated, which was capable to express TIMP1. The cell was subsequently infected with recombinant herpes simplex virus 1 (rHSV1-rc/△UL2) that was able to package the rAAV2-TIMP1. After purification, rAAV2-TIMP1 was obtained. Results The rAAV2 carrying human TIMP1 gene was constructed successfully. The viral titer of the rAAV2-TIMP1 was 1×1012 v.g./ml. Conclusion rAAV2-TIMP1 was constructed successfully, which would provide experimental basis for carrying the TIMP1 into hepatocellular carcinoma effectively and inhibiting the invasiveness and migratory capacity of hepatocellular carcinoma in vitro and in vivo models.
ObjectiveTo translate the King’s Brief Interstitial Lung Disease (K-BILD) to Chinese, so as to provide an well reliability and validity assessment instrument for health status of patients with interstitial lung disease.MethodsBrislin’s transition model, six expert’s panel and pre-survey were used for initial Chinese version of K-BILD. Items analysis, exploratory factor analysis (EFA), confirmatory factor analysis (CFA), internal consistency reliability and test-retest reliability were used for validity and reliability test with 122 respondents.ResultsTen-item Chinese version of K-BILD were proved to have great psychometric qualities, two factors were extracted by EFA, which could explain 63.35% of the total variance. Furthermore, the CFA demonstrates the fit indices of two-factors mode: χ2/df=0.797, RMSEA=0.000, NFI=0.848, IFI=1.048, CFI=1.000, TLI=1.071. Cronbach’s α and Guttman Split-half were 0.893 and 0.861, respectively. Besides, the test-retest reliability of the scale was 0.805.ConclusionThe Chinese version of K-BILD scale has good validity and reliability, which is applicable for health status assessment in patient with interstitial lung disease.