title: Combined pluronic P85- and ultrasound contrast agents-mediated gene transfection to HepG2 cells.
abstract: This study examined the effect of P85 (a pluronic block copolymer) and microbubble (MB) ultrasound contrast agents under ultrasound irradiation on gene transfection and expression. The pEGFP plasmids that can encode enhanced green fluorescent protein (pEGFP) served as a report gene and were mixed with different concentrations of MB/0.05% (w/v) P85. Then the plasmids were transfected into human hepatoma G2 (HepG2) cells. The HepG2 cells treated with MB/P85 or without treatment were exposed to ultrasound (US parameters: 1 MHz, 1.0 W/cm(2), 20 s, 20% duty cycle). Twenty-four hours later, the transfection efficiency was assessed by fluorescence microscopy and fluorescence activated cell sorting (FACS) analysis. The cell viability was evaluated by Trypan blue exclusion test. The results showed that the gene transfection efficiency in HepG2 cells under ultrasound irradiation was significantly higher than that without ultrasound irradiation. HepG2 cells in the MB or P85 group in the absence of ultrasound expressed less amount of green fluorescent protein. The expression efficiency reached (22.14 ± 3.06)% and the survival rate was as high as (55.73 ± 3.32)% in the 30% MB plus P85 group. It was concluded that MB and P85 in the presence of ultrasound can enhance gene transfection and expression.
authors.affiliation: Department of Ultrasound, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China.|Department of Ultrasound, Henan Provincial People's Hospital, Zhengzhou, 450000, China.
authors.forename: Xijun
authors.initials: X
authors.lastname: Zhang
authors.affiliation: Department of Ultrasound, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China. LiKY20006@126.com.
authors.forename: Kaiyan
authors.initials: K
authors.lastname: Li
authors.affiliation: Department of Ultrasound, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China.
authors.forename: Xian
authors.initials: X
authors.lastname: Cui
authors.affiliation: Department of Ultrasound, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China.
authors.forename: Liangjun
authors.initials: L
authors.lastname: Hu
authors.affiliation: Department of Ultrasound, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China.
authors.forename: Yunchao
authors.initials: Y
authors.lastname: Chen
mesh_terms: D003287:Contrast Media / Q000494:pharmacology*; D049452:Green Fluorescent Proteins / Q000235:genetics; D056945:Hep G2 Cells; D006801:Humans; D045423:Microbubbles; D011060:Poloxalene / Q000494:pharmacology*; D014162:Transfection / Q000379:methods*; D014465:Ultrasonics
chemical_list: D003287:Contrast Media; C485184:enhanced green fluorescent protein; C422648:pluronic block copolymer p85; D049452:Green Fluorescent Proteins; D011060:Poloxalene