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Viruses 2015, 7(10), 5610-5618; doi:10.3390/v7102890

Entry of Oncolytic Herpes Simplex Virus into Human Squamous Cell Carcinoma Cells by Ultrasound

1
Department of Oral and Maxillofacial Surgery, Osaka University Graduate School of Dentistry, 1-8 Yamadaoka, Suita, Osaka 565-0871, Japan
2
Dental and Oral Surgery, Izumisano Municipal Hospital, 2-23 Rinkuoraikita, Izumisano, Osaka 598-8577, Japan
*
Author to whom correspondence should be addressed.
Academic Editors: E. Antonio Chiocca and Martine L.M. Lamfers
Received: 29 July 2015 / Revised: 22 September 2015 / Accepted: 9 October 2015 / Published: 26 October 2015
(This article belongs to the Special Issue Oncolytic Viruses)
View Full-Text   |   Download PDF [2029 KB, uploaded 26 October 2015]   |  

Abstract

Low-intensity ultrasound is a useful method to introduce materials into cells due to the transient formation of micropores, called sonoporations, on the cell membrane. Whether oncolytic herpes simplex virus type 1 (HSV-1) can be introduced into oral squamous cell carcinoma (SCC) cells through membrane pores remains undetermined. Human SCC cell line SAS and oncolytic HSV-1 RH2, which was deficient in the 134.5 gene and fusogenic, were used. Cells were exposed to ultrasound in the presence or absence of microbubbles. The increase of virus entry was estimated by plaque numbers. Viral infection was hardly established without the adsorption step, but plaque number was increased by the exposure of HSV-1-inoculated cells to ultrasound. Plaque number was also increased even if SAS cells were exposed to ultrasound and inoculated with RH2 without the adsorption step. This effect was abolished when the interval from ultrasound exposure to virus inoculation was prolonged. Scanning electron microscopy revealed depressed spots on the cell surface after exposure to ultrasound. These results suggest that oncolytic HSV-1 RH2 can be introduced into SAS cells through ultrasound-mediated pores of the cell membrane that are resealed after an interval. View Full-Text
Keywords: oncolytic HSV-1; squamous cell carcinoma; ultrasound; microbubble oncolytic HSV-1; squamous cell carcinoma; ultrasound; microbubble
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Okunaga, S.; Takasu, A.; Meshii, N.; Imai, T.; Hamada, M.; Iwai, S.; Yura, Y. Entry of Oncolytic Herpes Simplex Virus into Human Squamous Cell Carcinoma Cells by Ultrasound. Viruses 2015, 7, 5610-5618.

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