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Kashiwagi Y, Imahori H, Araki Y, Ito O, Yamada K, Sakata Y, Fukuzumi S. Strong Inhibition of Singlet Oxygen Sensitization in Pyridylferrocene−Fluorinated Zinc Porphyrin Supramolecular Complexes. J Phys Chem A 2003. [DOI: 10.1021/jp034920q] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yukiyasu Kashiwagi
- Department of Material and Life Science, Graduate School of Engineering, Osaka University, CREST, Japan Science and Technology Corporation (JST), Suita, Osaka 565-0871, Japan, Department of Molecular Engineering, Graduate School of Engineering, Kyoto University, PRESTO, JST, Sakyo-ku, Kyoto 606-8501, Japan, Fukui Institute for Fundamental Chemistry, Kyoto University, 34-4, Takano-Nishihiraki-cho, Sakyo-ku, Kyoto 606-8103, Japan, Institute for Multidisciplinary Research for Advanced Materials, Tohoku
| | - Hiroshi Imahori
- Department of Material and Life Science, Graduate School of Engineering, Osaka University, CREST, Japan Science and Technology Corporation (JST), Suita, Osaka 565-0871, Japan, Department of Molecular Engineering, Graduate School of Engineering, Kyoto University, PRESTO, JST, Sakyo-ku, Kyoto 606-8501, Japan, Fukui Institute for Fundamental Chemistry, Kyoto University, 34-4, Takano-Nishihiraki-cho, Sakyo-ku, Kyoto 606-8103, Japan, Institute for Multidisciplinary Research for Advanced Materials, Tohoku
| | - Yasuyuki Araki
- Department of Material and Life Science, Graduate School of Engineering, Osaka University, CREST, Japan Science and Technology Corporation (JST), Suita, Osaka 565-0871, Japan, Department of Molecular Engineering, Graduate School of Engineering, Kyoto University, PRESTO, JST, Sakyo-ku, Kyoto 606-8501, Japan, Fukui Institute for Fundamental Chemistry, Kyoto University, 34-4, Takano-Nishihiraki-cho, Sakyo-ku, Kyoto 606-8103, Japan, Institute for Multidisciplinary Research for Advanced Materials, Tohoku
| | - Osamu Ito
- Department of Material and Life Science, Graduate School of Engineering, Osaka University, CREST, Japan Science and Technology Corporation (JST), Suita, Osaka 565-0871, Japan, Department of Molecular Engineering, Graduate School of Engineering, Kyoto University, PRESTO, JST, Sakyo-ku, Kyoto 606-8501, Japan, Fukui Institute for Fundamental Chemistry, Kyoto University, 34-4, Takano-Nishihiraki-cho, Sakyo-ku, Kyoto 606-8103, Japan, Institute for Multidisciplinary Research for Advanced Materials, Tohoku
| | - Koji Yamada
- Department of Material and Life Science, Graduate School of Engineering, Osaka University, CREST, Japan Science and Technology Corporation (JST), Suita, Osaka 565-0871, Japan, Department of Molecular Engineering, Graduate School of Engineering, Kyoto University, PRESTO, JST, Sakyo-ku, Kyoto 606-8501, Japan, Fukui Institute for Fundamental Chemistry, Kyoto University, 34-4, Takano-Nishihiraki-cho, Sakyo-ku, Kyoto 606-8103, Japan, Institute for Multidisciplinary Research for Advanced Materials, Tohoku
| | - Yoshiteru Sakata
- Department of Material and Life Science, Graduate School of Engineering, Osaka University, CREST, Japan Science and Technology Corporation (JST), Suita, Osaka 565-0871, Japan, Department of Molecular Engineering, Graduate School of Engineering, Kyoto University, PRESTO, JST, Sakyo-ku, Kyoto 606-8501, Japan, Fukui Institute for Fundamental Chemistry, Kyoto University, 34-4, Takano-Nishihiraki-cho, Sakyo-ku, Kyoto 606-8103, Japan, Institute for Multidisciplinary Research for Advanced Materials, Tohoku
| | - Shunichi Fukuzumi
- Department of Material and Life Science, Graduate School of Engineering, Osaka University, CREST, Japan Science and Technology Corporation (JST), Suita, Osaka 565-0871, Japan, Department of Molecular Engineering, Graduate School of Engineering, Kyoto University, PRESTO, JST, Sakyo-ku, Kyoto 606-8501, Japan, Fukui Institute for Fundamental Chemistry, Kyoto University, 34-4, Takano-Nishihiraki-cho, Sakyo-ku, Kyoto 606-8103, Japan, Institute for Multidisciplinary Research for Advanced Materials, Tohoku
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Bugaj JE, Achilefu S, Dorshow RB, Rajagopalan R. Novel fluorescent contrast agents for optical imaging of in vivo tumors based on a receptor-targeted dye-peptide conjugate platform. JOURNAL OF BIOMEDICAL OPTICS 2001; 6:122-133. [PMID: 11375721 DOI: 10.1117/1.1352748] [Citation(s) in RCA: 94] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2000] [Revised: 12/13/2000] [Accepted: 12/13/2000] [Indexed: 05/23/2023]
Abstract
We have designed, synthesized, and evaluated the efficacy of novel dye-peptide conjugates that are receptor specific. Contrary to the traditional approach of conjugating dyes to large proteins and antibodies, we used small peptide-dye conjugates that target over-expressed receptors on tumors. Despite the fact that the peptide and the dye probe have similar molecular mass, our results demonstrate that the affinity of the peptide for its receptor and the dye fluorescence properties are both retained. The use of small peptides has several advantages over large biomolecules, including ease of synthesis of a variety of compounds for potential combinatorial screening of new targets, reproducibility of high purity compounds, diffusiveness to solid tumors, and the ability to incorporate a variety of functional groups that modify the pharmacokinetics of the peptide-dye conjugates. The efficacy of these new fluorescent optical contrast agents was evaluated in vivo in well-characterized rat tumor lines expressing somatostatin (sst(2)) and bombesin receptors. A simple continuous wave optical imaging system was employed. The resulting optical images clearly show that successful specific tumor targeting was achieved. Thus, we have demonstrated that small peptide-dye conjugates are effective as contrast agents for optical imaging of tumors.
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Affiliation(s)
- J E Bugaj
- Mallinckrodt Inc., P.O. Box 5840, St. Louis, Missouri 63134-0840, USA
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van Staveren HJ, Speelman OC, Witjes MJ, Cincotta L, Star WM. Fluorescence imaging and spectroscopy of ethyl nile blue A in animal models of (pre)malignancies. Photochem Photobiol 2001; 73:32-8. [PMID: 11202363 DOI: 10.1562/0031-8655(2001)073<0032:fiasoe>2.0.co;2] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Discrimination between normal and premalignant tissues by fluorescence imaging and/or spectroscopy may be enhanced by a tumor-localizing fluorescent drug. Ethyl Nile Blue A (EtNBA), a dye with no phototoxic activity, was investigated for this purpose. The pharmacokinetics and tissue-localizing properties were investigated in a rat palate model with chemically induced premalignant mucosal lesions (0.5 mg/kg EtNBA intravenous [i.v.]), a hairless mouse model with UVB-induced premalignant skin lesions (1 mg/kg EtNBA intraperitoneal) and in a rat skin-fold observation chamber model on the back of a rat with a transplanted solid tumor (2.5 mg/kg EtNBA i.v.). Fluorescence images and spectra were recorded in vivo (600 nm excitation, 665-900 nm detection) and in frozen tissue sections at several time points after EtNBA administration. In the rat palate the EtNBA fluorescence was maximum almost immediately after injection, whereas in the mouse skin and the observation chamber the fluorescence maximum was reached between 2 and 3 h after injection. EtNBA cleared from tissues after 8-24 h. EtNBA localizes in the transplantable solid tumor, but is not targeted specifically to the dysplastic location in the rat palate and mouse skin. However, in the rat palate the EtNBA fluorescence increased significantly with increasing dysplasia, apparently due to the increasing thickness of the upper keratinized layer of the epithelium where the dye was found to localize. Localization in this layer occurred both in the rat palate and in hairless mouse skin.
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Affiliation(s)
- H J van Staveren
- Photodynamic Therapy and Optical Spectroscopy Program, Division of Clinical Physics, Department of Radiation Oncology, Daniel den Hoed Cancer Center, University Hospital Rotterdam, P.O. Box 5201, 3008 AE Rotterdam, The Netherlands
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