Liposome‑mediated transfection of wild‑type P53 DNA into human prostate cancer cells is improved by low‑frequency ultrasound combined with microbubbles

Bai,Wen‑Kun; Zhang,Wei; Hu,Bing; Ying,Tao

doi:10.3892/ol.2016.4477

Liposome‑mediated transfection of wild‑type P53 DNA into human prostate cancer cells is improved by low‑frequency ultrasound combined with microbubbles

Authors:
- Wen‑Kun Bai
- Wei Zhang
- Bing Hu
- Tao Ying
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Affiliations: Department of Ultrasound in Medicine, Shanghai Institute of Ultrasound in Medicine, Sixth People's Hospital Affiliated to Shanghai Jiao Tong University, Shanghai 200233, P.R. China
Published online on: April 20, 2016 https://doi.org/10.3892/ol.2016.4477
Pages: 3829-3834

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Abstract

Prostate cancer is a common type of cancer in elderly men. The aim of the present study was to evaluate the effects of ultrasound exposure in combination with SonoVue microbubbles on liposome‑mediated transfection of wild‑type P53 genes into human prostate cancer cells. PC‑3 human prostate cancer cells were exposed to ultrasound; duty cycle was controlled at 20% (2 sec on, 8 sec off) for 5 min with and without SonoVue microbubble echo‑contrast agent using a digital sonifier (frequency, 21 kHz; intensity, 46 mW/cm2). The cells were divided into eight groups, as follows: Group A (SonoVue + wild‑type P53), group B (ultrasound + wild‑type P53), group C (SonoVue + ultrasound + wild‑type P53), group D (liposome + wild‑type P53), group E (liposome + SonoVue + wild‑type P53), group F (liposome + wild‑type P53 + ultrasound), group G (liposome + wild‑type P53 + ultrasound + SonoVue) and the control group (wild‑type P53). Following treatment, a hemocytometer was used to measure cell lysis, reverse transcription‑quantitative polymerase chain reaction and western blotting were performed to detect P53 gene transfection efficiency, Cell Counting Kit‑8 was employed to reveal cell proliferation and Annexin V/propidium iodide staining was used to determine cell apoptosis. Cell lysis was minimal in each group. Wild‑type P53 gene and protein expression were significantly increased in the PC‑3 cells in group G compared with the control and all other groups (P<0.01). Cell proliferation was significantly suppressed in group G compared with the control group and all other groups (P<0.01). Cell apoptosis levels in group G were significantly improved compared with the control group and all other groups (P<0.01). Thus, the results of the present study indicate that the use of low‑frequency and low‑energy ultrasound in combination with SonoVue microbubbles may be a potent physical method for increasing liposome gene delivery efficiency.

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