Abstract
The recombinant vaccinia virus VG9 and the STAT3 inhibitor Stattic were combined to kill cancer cells via both oncolytic activity and inhibition of STAT3 phosphorylation in cells. The combinatory anti-tumour activity of these compounds was superior to the activity of VG9 or Stattic alone in vivo. The inhibition of tumour growth occurred via increased apoptosis and autophagy pathways. Furthermore, the combinatory anti-tumour activity was more efficient than that of VG9 or Stattic alone on xenografts, especially in nude mice.
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Acknowledgements
This work was supported by the National Natural Science Foundation (31671035, 51473071, 21504034), by the National Significant New Drugs Creation Program, by the Jiangsu Province Foundation (BK20161137, BE2016632, BK20170204), and also by the Jiangsu Provincial Medical Innovation Team.
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705_2019_4257_MOESM1_ESM.jpg
Supplementary material 1: Fig. S1. Expression of GFP in BEL-7402 cells infected with VG9. A–F, infection withVG9 at different MOIs of A 0 PFU/cell; B 0.01 PFU/cell; C 0.05 PFU/cell; D 0.1PFU/cell; E 0.5 PFU/cell; F 1 PFU/cell. Scale bar: 50 μm (JPG 9462 kb)
705_2019_4257_MOESM2_ESM.jpg
Supplementary material 2: Fig. S2. Western blot analysis showing the expression of apoptosis-associated proteins in HeLa cells treated with 2 μM Stattic alone. The ratios of phospho-STAT3 to total STAT3 on day 1 to day 2 decreased. The levels of caspases-3 and -8 both increased from day 2 to day 3. The ratios of Bcl-2 to Bax decreased. Stattic induced apoptosis in HeLa cells. Data are represented as the mean ± SD. *p < 0.05; **p < 0.01; ***p < 0.001 (t-test) (JPG 949 kb)
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Yang, R., Wang, L., Sheng, J. et al. Combinatory effects of vaccinia virus VG9 and the STAT3 inhibitor Stattic on cancer therapy. Arch Virol 164, 1805–1814 (2019). https://doi.org/10.1007/s00705-019-04257-2
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DOI: https://doi.org/10.1007/s00705-019-04257-2