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里山のチョウ類が激減 耕作放棄地増加などが影響か 環境省 (NHK)

里山などに生息するチョウ類のうち、ミヤマカラスアゲハなど34種の数が急速に減少していることが環境省などの調査でわかりました。 環境省と日本自然保護協会は大学や住...

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Plasmonic Nanodiamonds: Targeted Core-Shell Type Nanoparticles for Cancer Cell Thermoablation.

著者 Rehor I , Lee KL , Chen K , Hajek M , Havlik J , Lokajova J , Masat M , Slegerova J , Shukla S , Heidari H , Bals S , Steinmetz NF , Cigler P
Adv Healthc Mater.2014 Oct 21 ; ():.
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Targeted biocompatible nanostructures with controlled plasmonic and morphological parameters are promising materials for cancer treatment based on selective thermal ablation of cells. Here, core-shell plasmonic nanodiamonds consisting of a silica-encapsulated diamond nanocrystal coated in a gold shell are designed and synthesized. The architecture of particles is analyzed and confirmed in detail using electron tomography. The particles are biocompatibilized using a PEG polymer terminated with bioorthogonally reactive alkyne groups. Azide-modified transferrin is attached to these particles, and their high colloidal stability and successful targeting to cancer cells overexpressing the transferrin receptor are demonstrated. The particles are nontoxic to the cells and they are readily internalized upon binding to the transferrin receptor. The high plasmonic cross section of the particles in the near-infrared region is utilized to quantitatively ablate the cancer cells with a short, one-minute irradiation by a pulse 750-nm laser.
PMID: 25336437 [PubMed - as supplied by publisher]
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