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Mesoporous silica nanoparticles deliver DNA and chemicals into plants

Nature Nanotechnology volume 2, pages 295300 (2007) | Download Citation

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Abstract

Surface-functionalized silica nanoparticles can deliver DNA1,2,3,4,5,6,7,8 and drugs9,10,11,12,13,14,15 into animal cells and tissues. However, their use in plants is limited by the cell wall present in plant cells. Here we show a honeycomb mesoporous silica nanoparticle (MSN) system with 3-nm pores that can transport DNA and chemicals into isolated plant cells and intact leaves. We loaded the MSN with the gene and its chemical inducer and capped the ends with gold nanoparticles to keep the molecules from leaching out. Uncapping the gold nanoparticles released the chemicals and triggered gene expression in the plants under controlled-release conditions. Further developments such as pore enlargement and multifunctionalization of these MSNs may offer new possibilities in target-specific delivery of proteins, nucleotides and chemicals in plant biotechnology.

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Acknowledgements

We thank N.-H. Chua for providing pER8-GFP. Special thanks go to M. Carter for confocal microscope assistance, B. Frame and L. Moeller for discussions, and the Plant Transformation Facility personnel for providing maize immature embryos and maize callus media. The authors thank the Plant Science Institute at Iowa State University for financial support. V.S.-Y.L. thanks the U.S. NSF (CHE-0239570), the US DOE and the Office of Basic Energy Sciences (W-7405-Eng-82) for financial support for the synthesis and characterization of the MSN materials.

Correspondence regarding nanoparticles and requests for nanoparticle materials should be addressed to V.S.-Y.L.

Author information

Affiliations

  1. Center for Plant Transformation, Plant Science Institute and Department of Agronomy, Iowa State University, Ames, Iowa 50011, USA

    • François Torney
    •  & Kan Wang
  2. Department of Chemistry, US DOE Ames Laboratory, Iowa State University, Ames, Iowa 50011, USA

    • Brian G. Trewyn
    •  & Victor S.-Y. Lin

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Contributions

F.T. and K.W. conceived and designed the plant transformation experiments. F.T. performed the plant transformation experiments. V.S.-Y.L. and B.G.T. conceived and designed the surface functionalized mesoporous silica nanoparticle systems for the controlled release of DNAs and chemicals. B.G.T. performed experiments on the synthesis and characterization of the capped mesoporous silica nanoparticle materials. All authors discussed the results and participated in the writing of the manuscript.

Competing interests

The authors declare no competing financial interests.

Corresponding authors

Correspondence to Victor S.-Y. Lin or Kan Wang.

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DOI

https://doi.org/10.1038/nnano.2007.108

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