title: In vivo site-specific transfection of naked plasmid DNA and siRNAs in mice by using a tissue suction device.
abstract: We have developed an in vivo transfection method for naked plasmid DNA (pDNA) and siRNA in mice by using a tissue suction device. The target tissue was suctioned by a device made of polydimethylsiloxane (PDMS) following the intravenous injection of naked pDNA or siRNA. Transfection of pDNA encoding luciferase was achieved by the suction of the kidney, liver, spleen, and heart, but not the duodenum, skeletal muscle, or stomach. Luciferase expression was specifically observed at the suctioned region of the tissue, and the highest luciferase expression was detected at the surface of the tissue (0.12±0.03 ng/mg protein in mice liver). Luciferase expression levels in the whole liver increased linearly with an increase in the number of times the liver was suctioned. Transfection of siRNA targeting glyceraldehyde 3-phosphate dehydrogenase (GAPDH) gene significantly suppressed the expression of GAPDH mRNA in the liver. Histological analysis shows that severe damage was not observed in the suctioned livers. Since the suction device can be mounted onto the head of the endoscope, this method is a minimally invasive. These results indicate that the in vivo transfection method developed in this study will be a viable approach for biological research and therapies using nucleic acids.
authors: Institute for Innovative NanoBio Drug Discovery and Development, Graduate School of Pharmaceutical Sciences, Kyoto University, Kyoto, Japan. kshimizu@pharm.kyoto-u.ac.jp
authors: Kazunori
authors: K
authors: Shimizu
authors: Shigeru
authors: S
authors: Kawakami
authors: Kouji
authors: K
authors: Hayashi
authors: Hideyuki
authors: H
authors: Kinoshita
authors: Koichiro
authors: K
authors: Kuwahara
authors: Kazuwa
authors: K
authors: Nakao
authors: Mitsuru
authors: M
authors: Hashida
authors: Satoshi
authors: S
authors: Konishi
mesh_terms: D000818:Animals; D004247:DNA / Q000235:genetics*; D004129:Dimethylpolysiloxanes; D005260:Female; D008099:Liver / Q000293:injuries; D008156:Luciferases / Q000235:genetics; D051379:Mice; D008813:Mice, Inbred ICR; D009928:Organ Specificity; D010957:Plasmids / Q000235:genetics*; D034741:RNA, Small Interfering / Q000235:genetics*; D014162:Transfection / Q000295:instrumentation*
chemical_list: D004129:Dimethylpolysiloxanes; D034741:RNA, Small Interfering; C013830:baysilon; D004247:DNA; D008156:Luciferases