Multi-modal Efficacy of a Chimeric Vesiculovirus Expressing the Morreton Glycoprotein in Sarcoma
Molecular Therapy - Oncolytics(2022)
摘要
Vesiculoviruses are attractive oncolytic virus (OV) platforms due to their rapid replication, genome with appreciable transgene capacity, broad tropism, limited pre-existing immunity, and type I interferon response gradient between malignant and normal cells. We developed a synthetic chimeric virus (VMG) expressing the glycoprotein (G) from Morreton virus (MorV) with remaining genes from vesicular stomatitis virus (VSV). VMG exhibited in vitro efficacy in cell proliferation and cell death assays across a broad range of sarcoma subtypes and across multiple species. Notably, all cell lines tested showed ability of VMG to yield productive infections with rapid replication kinetics. Pilot safety evaluations of VMG in immunocompetent, non-tumor bearing mice showed absence of toxicity with intranasal doses as high as 1e10 TCID50. VMG resulted in tumor reduction in vivo in an immunodeficient subcutaneous Ewing sarcoma model at doses as low as 2e5 TCID50. In the immune competent murine syngeneic fibrosarcoma model, while no tumor inhibition was achieved with VMG, there was a robust induction of CD8+ T cells suggestive of potential for combination approaches with immunomodulatory agents such as immune checkpoint inhibitors. The studies described herein establish the potential for VMG as a novel oncolytic virotherapy platform with multi-modal anti-tumor effects in sarcoma.
### Competing Interest Statement
The authors have declared no competing interest.
* ALB
: albumin
ALP
: alkaline phosphatase
ALT
: alanine aminotransferase
AST
: aspartate aminotransferase
CPE
: cytopathic effect
FBS
: fetal bovine serum
GFP
: green fluorescent protein
GGT
: gamma-glutamyl transferase
GLU
: glucose
h
: hours
hIFNβ
: human interferon beta
hpi
: hours post-infection
IFNβ
: interferon beta
IFNAR
: interferon alpha receptor
IGR
: intergenic regions
IT
: intratumoral
mIFNβ
: murine interferon beta
MOI
: multiplicity of infection
MorV
: Morreton virus
MTD
: maximum tolerated dose
MTS
: [3-(4,5-dimethylthiazol-2-yl)-5-(3-carboxymethoxyphenyl)-2-(4-sulfophenyl)-2H-tetrazolium, inner salt
NOD
: SCIDnon-obese diabetic severe combined immunodeficient NK cells natural killer cells
NU/J
: athymic nude mouse OS overall survival
OV
: oncolytic virus
RPMI
: Roswell Park Memorial Institute medium
SD
: standard deviation
TBIL
: total bilirubin
TCID50
: 50% tissue culture infectious dose
t-SNE
: t-distributed stochastic neighbor embedding
VMG
: VSV-MorV-G
VSV
: Vesicular stomatitis virus
更多查看译文
关键词
oncolytics,sarcoma,Morreton virus,vesiculovirus,virotherapy
AI 理解论文
溯源树
样例
生成溯源树,研究论文发展脉络
Chat Paper
正在生成论文摘要