In this investigation, we aimed to deliver replication-competent adenovirus into glioma tissues by taking advantage of the tumor tropism of MSCs.
We also determined suitable adenovirus titer in vitro and then used this titer to analyze the ability of MSCs to deliver replication-competent adenovirus into glioma in vivo.
Therefore, in this study, we attempted to treat glioma by using MSCs as a vehicle for delivering replication-competent adenovirus.
The results validate that MSCs are an efficacious vehicle in gene therapy that successfully delivers replication-competent adenovirus into tumor sites and causes antitumor effects.
This would also limit the use of BIR forks, which have recently been shown not to deliver the same replication accuracy as regular S phase RFs (Deem et al. 2011).
E1B-55 kD-deleted adenovirus has been shown to act as a helper virus and augment the expression of the accompanying cytokine genes delivered by replication-defective adenoviral vector (Motoi et al, 2000).
The expression of AChE in gastric cancerous tissues and adjacent non-cancerous tissues was examined by immunohistochemistry. Gastric cancer cells were treated with AChE delivered by replication-deficient adenoviral vector (Ad.AChE) or oncolytic adenoviral vector (ZD55-AChE), respectively, followed by measurement of cell viability and apoptosis by MTT assay and apoptosis detection assays.
Though not presented in the paper, standard errors computed with different bootstrap designs, for instance, without strata option and with a different number of replications also deliver similar results.
Delivered systemically, replication of the virus is limited to cancer cells, and provoked regression of tumors at sites distant to the site of delivery in an MDA-MB-468 bilateral tumor model.
One inoculation of this subunit vaccine delivered in a replication-defective human adenovirus vector can induce rapid, within 7 days, and relatively long-lasting protection in swine.
The inhibitory effect of pTP-mi5 when expressed from and delivered with a replication-deficient adenoviral vector was very pronounced, but not complete.
