2008 NSTI Nanotechnology Conference and Trade Show - Nanotech 2008 - 11th Annual

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Clean Technology 2008

Characterization of DNA Transport through a Semipermeable Membrane with the Effect of Surfactants

S.W. Leung, S. Bartolin, C.K. Daniels, J.C.K. Lai
Idaho State University, US

DNA, membrane, transport, surfactant

In current advances of biotechnology, various models of introduction of DNA into cells to alter their gene expression have important biomedical and bioengineering applications. However, the molecular mechanisms underlying how DNA’s cross cell and nuclear membranes are poorly understood. Surfactants are known to influence functions of many proteins in membranes, cells and tissues; however, the natural configurations of DNA’s are more stable and are expected to behave differently compared to proteins, especially proteins with smaller size. Information for surfactants on DNA transport is nearly non-existent. We previously systematically reported how surfactants of different hydrophilicities affected three metabolically important enzymes (namely, glutamate dehydrogenase (GDH), lactate dehydrogenase (LDH), and malate dehydrogenase (MDH)) of various molecular masses and their transport behaviors through a semipermeable membrane at a pH range (6.5-7.4) and concentrations relevant to body functions. In this study, we employed a similar approach to investigate how membrane pore size, surfactant properties (anionic, cationic, size, non-ionic), pH, would affect the membrane transport of different DNA’s. All these factors would modulate DNA transport to certain extent. Results of this research study would have many implications and applications in bioengineering and cell signaling, further research is on-going and needed.

Nanotech 2008 Conference Program Abstract