Banijamali RS, Soleimanjahi H, Soudi S, Karimi H, Abdoli A, Seyed Khorrami SM, Zandi K. Kinetics of Oncolytic Reovirus T3D Replication and Growth Pattern in Mesenchymal Stem Cells.
CELL JOURNAL 2019;
22:283-292. [PMID:
31863653 PMCID:
PMC6947011 DOI:
10.22074/cellj.2020.6686]
[Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/30/2019] [Accepted: 04/20/2019] [Indexed: 12/20/2022]
Abstract
Objective
Currently, application of oncolytic-virus in cancer treatment of clinical trials are growing. Oncolytic-reovirus
is an attractive anti-cancer therapeutic agent for clinical testing. Many studies used mesenchymal stem cells (MSCs) as
a carrier cell to enhance the delivery and quality of treatment with oncolytic-virotherapy. But, biosynthetic capacity and
behavior of cells in response to viral infections are different. The infecting process of reoviruses takes from two-hours
to one-week, depends on host cell and the duration of different stages of virus replication cycle. The latter includes
the binding of virus particle, entry, uncoating, assembly and release of progeny-viruses. We evaluated the timing
and infection cycle of reovirus type-3 strain Dearing (T3D), using one-step replication experiment by molecular and
conventional methods in MSCs and L929 cell as control.
Materials and Methods
In this experimental study, L929 and adipose-derived MSCs were infected with different
multiplicities of infection (MOI) of reovirus T3D. At different time points, the quantity of progeny viruses has been
measured using virus titration assay and quantitative real-time polymerase chain reaction (qRT-PCR) to investigate
the ability of these cells to support the reovirus replication. One-step growth cycle were examined by 50% cell culture
infectious dose (CCID50) and qRT-PCR.
Results
The growth curve of reovirus in cells shows that MOI: 1 might be optimal for virus production compared to higher
and lower MOIs. The maximum quantity of virus production using MOI: 1 was achieved at 48-hours post-infection. The
infectious virus titer became stationary at 72-hours post-infection and then gradually decreased. The virus cytopathic
effect was obvious in MSCs and this cells were susceptible to reovirus infection and support the virus replication.
Conclusion
Our data highlights the timing schedule for reovirus replication, kinetics models and burst size. Further
investigation is recommended to better understanding of the challenges and opportunities, for using MSCs loaded with
reovirus in cancer-therapy.
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