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Title: Amplifying the Red-Emission of Upconverting Nanoparticles for Biocompatible Clinically Used Prodrug-Induced Photodynamic Therapy

Journal Article · · ACS Nano
DOI:https://doi.org/10.1021/nn505051d· OSTI ID:1257361
 [1];  [2];  [1];  [1];  [1];  [1];  [3];  [3];  [4];  [5];  [1]
  1. Univ. of Massachusetts, Amherst, MA (United States)
  2. Univ. of Massachusetts, Amherst, MA (United States); Dalian Univ. of Technology, Dalian (China)
  3. Soochow Univ., Suzhou, Jiangsu (China)
  4. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Molecular Foundry
  5. Dalian Univ. of Technology, Dalian (China)

A class of biocompatible upconverting nanoparticles (UCNPs) with largely amplified red-emissions was developed. The optimal UCNP shows a high absolute upconversion quantum yield of 3.2% in red-emission, which is 15-fold stronger than the known optimal β-phase core/shell UCNPs. When conjugated to aminolevulinic acid, a clinically used photodynamic therapy (PDT) prodrug, significant PDT effect in tumor was demonstrated in a deep-tissue (>1.2 cm) setting in vivo at a biocompatible laser power density. Furthermore, we show that our UCNP–PDT system with NIR irradiation outperforms clinically used red light irradiation in a deep tumor setting in vivo. This study marks a major step forward in photodynamic therapy utilizing UCNPs to effectively access deep-set tumors.Lastly, it also provides an opportunity for the wide application of upconverting red radiation in photonics and biophotonics.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC02-05CH11231; R01MH103133; RGY0090/2014
OSTI ID:
1257361
Journal Information:
ACS Nano, Vol. 8, Issue 10; ISSN 1936-0851
Publisher:
American Chemical SocietyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 227 works
Citation information provided by
Web of Science

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Upconversion in Nanostructured Materials: From Optical Tuning to Biomedical Applications journal January 2018
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