Please use this identifier to cite or link to this item:
Title: Improved formulation of photosensitizer chlorin e6 polyvinylpyrrolidone for fluorescence diagnostic imaging and photodynamic therapy of human cancer
Authors: Chin, W.W.L.
Heng, P.W.S. 
Thong, P.S.P.
Bhuvaneswari, R.
Hirt, W.
Kuenzel, S.
Soo, K.C.
Olivo, M. 
Keywords: Biodistribution
Chlorin e6
Fluorescence diagnosis
Photodynamic therapy
Issue Date: Aug-2008
Citation: Chin, W.W.L., Heng, P.W.S., Thong, P.S.P., Bhuvaneswari, R., Hirt, W., Kuenzel, S., Soo, K.C., Olivo, M. (2008-08). Improved formulation of photosensitizer chlorin e6 polyvinylpyrrolidone for fluorescence diagnostic imaging and photodynamic therapy of human cancer. European Journal of Pharmaceutics and Biopharmaceutics 69 (3) : 1083-1093. ScholarBank@NUS Repository.
Abstract: An improved formulation of the photosensitizer chlorin e6 (Ce6) in combination with the hydrophilic polymer polyvinylpyrrolidone (PVP) was investigated for its potential clinical applications in fluorescence diagnosis and photodynamic therapy (PDT) of cancer. This study reports the comparative preclinical biodistribution and efficacy of Ce6 delivered with or without PVP versus dimethyl sulfoxide (DMSO). The safety and fluorescence pharmacokinetics of Ce6-PVP in humans was also accessed. Biodistribution results showed that Ce6-PVP had higher tumor to normal tissue ratio compared to the other formulations. The sensitivity and specificity derived from the area under the receiver operating characteristics curves showed that the formulations were able to discriminate tumor from peritumoral muscle in the following order: Ce6-PVP > Ce6 > Ce6-DMSO. In vitro PDT results showed that Ce6-PVP was found to induce selective phototoxicity in leukemic cells compared to peripheral mononuclear blood cells. In addition, in vivo light irradiation at 1 h after Ce6-PVP was found to induce greater tumor necrosis without causing animal toxicity. In patients, preferential accumulation of Ce6-PVP was observed in angiosarcoma lesions compared to normal skin following intravenous administration. In conclusion, PVP significantly enhanced the Ce6 concentration in tumors compared with Ce6 alone and increased the therapeutic index of PDT without any side effects in animal model. No serious adverse events were observed in human as well. © 2008 Elsevier B.V. All rights reserved.
Source Title: European Journal of Pharmaceutics and Biopharmaceutics
ISSN: 09396411
DOI: 10.1016/j.ejpb.2008.02.013
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.


checked on Feb 14, 2019


checked on Feb 5, 2019

Page view(s)

checked on Dec 28, 2018

Google ScholarTM



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.