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Query: UMLS:C0001486 (Adenovirus)
 3,125 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Adenovirus has attracted much attention as a vector for gene therapy. Integrin alphavbeta3 and alphavbeta5 mediate adenovirus internalization into cells. We examined adenoviral transduction efficiency and expression of integrin alphavbeta3 alphavbeta5 in 9 human gastric carcinoma cell lines. The percentage of -gal-positive cells was more than 85% 3 days after infection with recombinant adenovirus carrying the bacterial LacZ gene (AxCALacZ) at a dose of 25 MOI in 7 cell lines and the transduction efficiency was 32 and 42% in HSC-39 and MKN-28 cells, respectively. Adenoviral transduction efficiency did not correlate with the histological cell types. Flow cytometric analysis revealed relatively high expression of integrin alphavbeta5 in MKN-28 and OCUM-2M cells, followed by MKN-1, MKN-7, MKN-45, MKN-74, TMK-1 and KATO-III cells. HSC-39 cells minimally expressed integrin alphavbeta5. On the other hand, integrin alphavbeta3 was expressed only in MKN-1 cells. These results suggest that the adenovirus vector might be useful for gene transduction into human gastric carcinoma cells and the transduction efficiency partly correlates with the expression levels of integrin alphavbeta5 but not integrin alphavbeta3.
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PMID:Adenoviral transduction efficiency partly correlates with expression levels of integrin alphavbeta5, but not alphavbeta3 in human gastric carcinoma cells. 985 44

Adenovirus (Ad) vectors are commonly used in gene therapy trials because of their efficiency in gene transfer. However, their use is limited by immune responses that reduce transgene expression and decrease the efficiency of repeated vector administration. In this study, the efficacy of gene transduction and the tumor-cell killing effect on four human oral (SAS, HSC-2, HSC-3, HSC-4) and one murine squamous cell carcinoma cell (SCC-7, a kind gift of Dr. M. Hiraoka, Kyoto University) lines in vitro with Ad vector conjugated with catioic liposome (Ad/SUV) was evaluated. Ad/SUV resulted in two to five-fold over higher transduction efficiency in four human and one murine cell lines in vitro than Ad vector alone. The optimal Ad-SUV ratio was determined as 10(6) pfu of Ad vector with 1 micromol SUV. Ad/SUV showed more tumor-cell killing effect than Ad vector alone. Furthermore, the shielding effects of Ad vector with Ad/SUV from neutralizing antibody were evaluated. We also found that Ad/SUV is less susceptible to inactivation by neutralizing antibodies in vitro. The efficacy of gene transduction with Ad vector was blocked more than 70% with neutralizing serum, while Ad/SUV retained approximately 50% of the control activity in vitro. On the basis of these results, the anti-tumor effect with suicide gene therapy using Ad/SUV in vivo was evaluated. Three injections of Ad/SUV showed the inhibition of tumor growth compared with control in vivo. Our results suggested that an enhanced anti-tumor effect on human oral squamous cell carcinoma would be obtained with repeated administrations of Ad/SUV.
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PMID:Improvement of transduction efficiency of recombinant adenovirus vector conjugated with cationic liposome for human oral squamous cell carcinoma cell lines. 1279 4