| Purpose: Reovirus type 3 Dearing (ReoT3D), a wild type oncolytic virus (OV) from the
Reoviridae family, kills KRAS mutant cancer cells. However, the use of oncolytic viruses
(OVs) has faced with some limitations such as immune responses, and delivery of OVs to the
tumor sites in systemic therapy. To solve this, and also to increase the anti-cancer effects of
these OVs, mesenchymal stem cells (MSCs) might be used as an effective vehicle for OVs
delivery. In this study, we examined the anti-cancer effects of human Adipose Derived-MSCs
(AD-MSCs) as a vehicle of ReoT3D against human gliobastoma cells.
Methods: Here, AD-MSCs were characterized and toxicity of ReoT3D on them was
determined by 3-(4, 5-dimethylthiazol-2-yl)-2, 5-diphenyltetrazolium bromide (MTT) assay.
Then, capability of AD-MSCs for virus production was assessed by real-time PCR, and
different in vitro anti-cancer experiments were applied for our anti-cancer purposes.
Results: Our results from toxicity assay revealed that the isolated and provoked AD-MSCs
were resistant to nontoxic concentration multiplicity of infection (MOI) >1 pfu/cells of
ReoT3D. In addition, the results indicated that AD-MSCs were susceptible for virus life cycle
complementation and were capable for production of virus progenies. Furthermore, our results
showed that AD-MSCs had oncolysis effects and increased the anti-cancer effects of ReoT3D.
Conclusion: AD-MSCs as a susceptible host for oncolytic reovirus could increase the anticancer activity of this OV against glioblastoma multiforme (GBM) cell line. |