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In JoVE (1)
Other Publications (2)
Articles by Xinyun Peng in JoVE
Mapping and Application of Enhancer-trap Flippase Expression in Larval and Adult Drosophila CNS
Taylor R. Fore1, Audrey A. Ojwang1, Margaret L. Warner1, Xinyun Peng1, Rudolf A. Bohm1,2, William P. Welch1, Lindsey K. Goodnight1, Hong Bao1, Bing Zhang1
1Department of Zoology, University of Oklahoma - Norman, 2Department of Biology, Brandeis University
We describe a Flippase-induced intersectional Gal80/Gal4 repression (FINGR) method, allowing tissue-specific FLP to determine Gal80 expression patterns. Wherever Gal4 and FLP overlap, Gal4 expression is turned on (Gal80 flipped out) or off (Gal80 flipped in). The FINGR method is versatile for clonal analysis and neural circuit mapping.
Other articles by Xinyun Peng on PubMed
Poly(epsilon-caprolactone)-poly(ethylene Glycol)-poly(epsilon-caprolactone) (PCL-PEG-PCL) Nanoparticles for Honokiol Delivery in Vitro
International Journal of Pharmaceutics. Jun, 2009 | Pubmed ID: 19427143
In this article, poly(epsilon-caprolactone)-poly(ethylene glycol)-poly(epsilon-caprolactone) (PCL-PEG-PCL, PCEC) nanoparticles were successfully prepared for honokiol delivery in vitro. Blank or honokiol loaded PCL-PEG-PCL nanoparticles were prepared in moderate condition by solvent diffusion method without using any surfactants. The prepared blank PCL-PEG-PCL nanoparticles are mono-dispersed and smaller than 200 nm. The particle size increased with increase in polymer concentration and oil-water (O/W) ratio. The prepared PCL-PEG-PCL nanoparticles (40 mg/mL, ca. 106 nm) did not induce hemolysis in vitro. And the 50% inhibiting concentration (IC50) of it (48 h) on HEK293 cells was higher than 5 mg/mL. Honokiol could be efficiently loaded into PCL-PEG-PCL nanoparticles and released from these nanoparticles in an extended period in vitro. After honokiol (HK) was entrapped into PCL-PEG-PCL nanoparticles, the particle size increased with the increase in HK/PCEC mass ratio in feed, and the encapsulated honokiol retained potent anticancer activity in vitro. The PCL-PEG-PCL nanoparticle was suitable for honokiol delivery, and such honokiol loaded PCL-PEG-PCL nanoparticle was a novel honokiol formulation.
Comparison of the Protective Effects of Truncated BFGF and Native BFGF Against Murine Lung Carcinoma
International Journal of Molecular Medicine. Jul, 2011 | Pubmed ID: 21503566
Basic fibroblast growth factor (bFGF), an angiogenic factor, exhibits pro-angiogenic abilities by interacting with tyrosine kinase receptors and heparin-sulfated proteoglycan receptors. Here, we designed an N-, C-terminally truncated basic fibroblast growth factor (tbFGF) for immuno-therapy of murine lung carcinoma with PCEC hydrogel as adjuvant, comparing it with the wild-type bFGF. In vitro, tbFGF did not stimulate NIH-3T3 fibroblast proliferation. In vivo, after immunization, both tbFGF and bFGF were able to induce a robust bFGF-specific immune response. The protective anti-tumor investigation showed a significant inhibition of tumor growth and reduction of tumor vascularization detected by immunohistochemical staining and the alginate-encapsulated tumor cell assay in the tbFGF or the bFGF group. These data suggested that tbFGF can be used in the immunotherapy of tumors, without the risks associated with bFGF, which induces neovascularization in normal tissues.