Volume 52, Issue 49 pp. 13028-13032
Communication

Development of Azo-Based Fluorescent Probes to Detect Different Levels of Hypoxia

Wen Piao

Wen Piao

Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033 (Japan)

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Satoru Tsuda

Satoru Tsuda

Department of Ophthalmology, Tohoku University, Graduate School of Medicine, 1-1 Seiryo-machi, Aoba-ku, Sendai, Miyagi 980-8574 (Japan)

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Dr. Yuji Tanaka

Dr. Yuji Tanaka

Department of Ophthalmology, Tohoku University, Graduate School of Medicine, 1-1 Seiryo-machi, Aoba-ku, Sendai, Miyagi 980-8574 (Japan)

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Dr. Satoshi Maeda

Dr. Satoshi Maeda

Department of Chemistry, Faculty of Science, Hokkaido University, Kita 10 Nishi 8, Kita-ku, Sapporo, Hokkaido 060-0808 (Japan)

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Dr. Fengyi Liu

Dr. Fengyi Liu

Fukui Institute for Fundamental Chemistry, Kyoto University, 34-4 Takano Nishihiraki-cho, Sakyo, Kyoto 606-8103 (Japan)

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Shodai Takahashi

Shodai Takahashi

Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033 (Japan)

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Yu Kushida

Yu Kushida

Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033 (Japan)

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Dr. Toru Komatsu

Dr. Toru Komatsu

Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033 (Japan)

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Dr. Tasuku Ueno

Dr. Tasuku Ueno

Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033 (Japan)

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Dr. Takuya Terai

Dr. Takuya Terai

Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033 (Japan)

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Prof. Toru Nakazawa

Prof. Toru Nakazawa

Department of Ophthalmology, Tohoku University, Graduate School of Medicine, 1-1 Seiryo-machi, Aoba-ku, Sendai, Miyagi 980-8574 (Japan)

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Prof. Masanobu Uchiyama

Prof. Masanobu Uchiyama

Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033 (Japan)

Advanced Elements Chemistry Laboratory, RIKEN 2-1 Hirosawa, Wako-shi, Saitama 351-0198 (Japan)

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Prof. Keiji Morokuma

Prof. Keiji Morokuma

Fukui Institute for Fundamental Chemistry, Kyoto University, 34-4 Takano Nishihiraki-cho, Sakyo, Kyoto 606-8103 (Japan)

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Prof. Tetsuo Nagano

Prof. Tetsuo Nagano

Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033 (Japan)

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Dr. Kenjiro Hanaoka

Corresponding Author

Dr. Kenjiro Hanaoka

Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033 (Japan)

Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033 (Japan)===Search for more papers by this author
First published: 14 October 2013
Citations: 254

This work was supported in part by MEXT (Specially Promoted Research Grant 22000006 to T.N., 24689003 and 24659042 to K.H., and 24655147 to T.K.) and SENTAN and JST( K.H.). K.H. was also supported by The Asahi Glass Foundation, The Uehara Memorial Foundation, the Tokyo Biochemical Research Foundation, the Inoue Foundation for Science, the Takeda Science Foundation, and The Cosmetology Research Foundation. The authors thank Mr. Yu Harabuchi of Hokkaido University for helpful discussions on photoreactions of azobenzene. Some of the theoretical calculations were carried out using the computational resources of the Institute for Molecular Science, Okazaki (Japan). W.P. was supported by a Grant-in-Aid for JSPS Fellows.

Graphical Abstract

Let it shine: New hypoxia-sensitive fluorescent probes were developed; they consist of a rhodamine moiety with an azo group directly conjugated to the fluorophore. Because of an ultrafast conformational change around the NN bond, the compounds are nonfluorescent under normoxia. However, under hypoxia, the azo group is reduced, and a strongly fluorescent rhodamine derivative is released.

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