Nano Archive

pH-sensitive carbonate apatite as an intracellular protein transporter

Tada, Seiichi and Chowdhury, Ezharul H. and Cho, Chong-Su and Akaike, Toshihiro (2010) pH-sensitive carbonate apatite as an intracellular protein transporter. BIOMATERIALS . ISSN 0142-9612

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Abstract

The transfer of specific proteins into living cells to enable the regulation of cell function or the tracking of the intracellular distribution of proteins is a desirable objective for offering a potential alternative to gene therapy. Here, protein/carbonate apatite complexes were successfully fabricated for intracellular delivery of functional proteins since the carbonate apatite being highly water solubility under an acidic condition could easily be dissolved in endosomes following endocytosis, thus releasing the electrostatically associated proteins in cytoplasm. In this study, we characterized protein/carbonate apatite complexes as an intracellular protein delivery system and we checked intracellular delivery of proteins by carbonate apatite nanoparticles in vitro. Fluorescently-labeled bovine serum albumin as a model protein was effectively delivered into nearly 100% of HeLa cells by the simple addition of protein/carbonate apatite complexes to the cells. Confocal microscopic imaging suggested the endosomal release of protein delivered with carbonate apatite. And intracellularly delivered beta-galactosidase did not lose its enzymatic activity. These results suggested that intracellular delivery system of protein using pH-sensitive carbonate apatite carrier with a very simple procedure will be a highly effective method to the biological and clinical researches.

Item Type:Article
Uncontrolled Keywords:MEMBRANE-PERMEABLE PEPTIDES; NANO-CRYSTALS; GENE DELIVERY; TRANSGENE DELIVERY; MAMMALIAN-CELLS; EFFICIENT; DNA; NANOPARTICLES; RELEASE; MICROINJECTION
Subjects:Biomedical Science > Nanobiotechnology
Material Science > Bio materials
Material Science > Nanochemistry
ID Code:8742
Deposited By:CSMNT
Deposited On:27 Mar 2010 08:35
Last Modified:27 Mar 2010 08:35

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