NDLI: Antitumor effect of microbubbles enhanced by low frequency ultrasound cavitation on prostate carcinoma xenografts in nude mice

Content Provider	PubMed Central
Author	Wang, Yu Hu, Bing Diao, Xuehong Zhang, Jizhen
Copyright Year	2012
Abstract	The aim of this study was to investigate the antitumor effect induced by low frequency (20 kHz) ultrasound (US) radiation combined with intravenous injection of microbubbles (Mbs) on prostate carcinoma Du145 xenografts in nude mice. Du145 prostate tumors were percutaneously implanted in 40 nude mice, which were randomly divided into 4 groups (n=10 each): US+Mbs, US, Mbs and control groups. The mice in the US+Mbs group were treated with 20 kHz, 200 mW/cm2 US radiation and with 0.2 ml Mbs injected intravenously. Mice in the US and Mbs groups were only treated with US radiation and injection of Mbs, respectively. Tumors were measured with sonography, and the ratio of antitumor growth was calculated. The mice were sacrificed 14 days after treatment. Specimens of the tumor tissues were observed pathologically using light microscopy and transmission electron microscopy. Microvessel density and the average optical density of vascular endothelial growth factor were compared among groups by immunohistochemistry. The average gross tumor volume of the US+Mbs group was significantly reduced compared with the other groups following treatment (P<0.05). The ratio of the antitumor growth in the US+Mbs group was significantly greater than that of the US and Mbs group (P<0.05). Histological examination showed signs of tumor cell injury in the US+Mbs group. Examination by electron microscopy revealed vessel injury in the endothelium in the tumors treated with US+Mbs. Microvessel density and the average optical density of vascular endothelial growth factor in the US+Mbs group were significantly less than that of other groups (P<0.05). In conclusion, low frequency US of 20 kHz radiation combined with Mbs may be used to inhibit the growth of human prostate carcinoma xenografts in nude mice, and the effect is likely realized through microvessel destruction caused by cavitation.
Related Links	http://dx.doi.org/10.3892/etm.2011.377
Starting Page	187
File Format	PDF
ISSN	17920981
e-ISSN	17921015
Journal	Experimental and Therapeutic Medicine
Issue Number	2
Volume Number	3
Language	English
Publisher	D.A. Spandidos
Publisher Date	2011-11-01
Access Restriction	Open
Rights Holder	D.A. Spandidos
Subject Keyword	Immunology and Microbiology (miscellaneous) Cancer Research Medicine(all) Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Cancer Research 2400/2401

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