Cell-Directed Assembly of Lipid-Silica Nanostructures Providing Extended Cell Viability

• Published in: Science (American Association for the Advancement of Science) Vol. 313; no. 5785; pp. 337 - 341
• Main Authors: Baca, Helen K., Ashley, Carlee, Carnes, Eric, Lopez, Deanna, Flemming, Jeb, Dunphy, Darren, Singh, Seema, Chen, Zhu, Liu, Nanguo, Fan, Hongyou, López, Gabriel P., Brozik, Susan M., Werner-Washburne, Margaret, Brinker, C. Jeffrey
• Format: Journal Article
• Language: English
• Published: Washington, DC American Association for the Advancement of Science 21.07.2006; The American Association for the Advancement of Science
• Subjects: Bacillus subtilis - physiology; Bacteria; Biological and medical sciences; Biotechnology; Buffers; Cell lines; Cell Membrane; Cell membranes; cell viability; Cell walls; Cells, Immobilized; Cellular biology; Drying; Escherichia coli - physiology; Fluorescence; Fluorescence Recovery After Photobleaching; Fundamental and applied biological sciences. Psychology; Gene expression; Green Fluorescent Proteins - biosynthesis; Hydrogen-Ion Concentration; Immobilized cells; Lipid Bilayers; Lipids; Material films; Micelles; Microscopy, Electron; Nanocrystals; Nanostructures; Phospholipids; plasmids; protein synthesis; proteins; Recombinant Proteins - biosynthesis; Saccharomyces cerevisiae; Saccharomyces cerevisiae - physiology; Scattering, Radiation; Silica; Silicon Dioxide; Viability; X-Rays; Yeast; Yeast; Phospholipid; Lipids; Joining; Nanostructure; Silica; Cell surface; Fungi; Bacteria; Ascomycetes; Saccharomyces cerevisiae; Viability; Thallophyta
• ISSN: 0036-8075; 1095-9203; 1095-9203
• DOI: 10.1126/science.1126590

Amphiphilic phospholipids were used to direct the formation of biocompatible, uniform silica nanostructures in the presence of Saccharomyces cerevisiae and bacterial cell lines. The cell surfaces organize multilayered phospholipid vesicles that interface coherently with the silica host and help relieve drying stresses that develop with conventional templates. These host structures maintain cell accessibility, addressability, and viability in the absence of buffer or an external fluidic architecture. The cell surfaces are accessible and can be used to localize added proteins, plasmids, and nanocrystals. Prolonged cell viability combined with reporter protein expression enabled stand-alone cell-based sensing.