Recent advances in self-assembling redox nanoparticles as a radiation protective agent

Chitho P. Feliciano; Sandrine Cammas-Marion; Yukio Nagasaki; Chitho P. Feliciano; Sandrine Cammas-Marion; Yukio Nagasaki

doi:10.3934/molsci.2023005

AIMS Molecular Science

2023, Volume 10, Issue 1: 52-69. doi: 10.3934/molsci.2023005

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Review

Recent advances in self-assembling redox nanoparticles as a radiation protective agent

1.
Radiation Research Center (RRC), Department of Science and Technology–Philippine Nuclear Research Institute (DOST-PNRI), Commonwealth Avenue, Diliman, Quezon City 1101, Philippines
2.
Health Physics Research Section, Atomic Research Division, Department of Science and Technology – Philippine Nuclear Research Institute (DOST-PNRI), Commonwealth Avenue, Diliman, Quezon City 1101, Philippines
3.
Institute of Chemical Sciences, UMR CNRS 6226 - Institut des Sciences Chimiques de Rennes, Université de Rennes 1, France
4.
Department of Materials Science, Graduate School of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennoudai, Tsukuba, Ibaraki 305-8573, Japan
5.
Master's School of Medical Sciences, Graduate School of Comprehensive Human Sciences, Tennoudai 1-1-1, Tsukuba, Ibaraki, 305-8573, Japan
6.
Center for Research in Isotopes and Environmental Dynamics (CRiED), University of Tsukuba, Tennoudai 1-1-1, Tsukuba, Ibaraki, 305-8573, Japan

Received: 01 November 2022 Revised: 30 January 2023 Accepted: 01 February 2023 Published: 13 February 2023

The search for potent radiation-protective drugs for clinical use continues. Studies have, so far, focused on targeting the neutralization of radiation-generated reactive oxygen species (ROS) to protect the cells against the deleterious effects of exposure to ionizing radiation. However, the development of efficacious radioprotective drugs, which are mostly low molecular weight (LMW) compounds, is mainly limited due to their inherent toxicity and rapid excretion from the body. Thus, researchers reformulated these LMW compounds into nano-based formulations. This review discusses recent advances in the use of self-assembling redox nanoparticles as a new group of radioprotective agents. The copolymer micelle (herein referred to as redox nanoparticles; RNP) contains an active part, amino-TEMPO, that effectively scavenges radiation-induced ROS in the body, as demonstrated in vivo. With the use of nanoparticle-based technologies, optimized formulations of these LMW ROS-neutralizers lead to the significant reduction of its toxicity, high bioavailability and longer blood circulation, which consequently resulted in its notable enhanced efficacy (for example, increased survival rate, reduced radiation-induced syndromes and organ damage) against the damaging effects of ionizing radiation. Consistent with the available data on the use of RNP and other nano-based radioprotective agents, it can be concluded that the inherent ROS-targeting activity of a drug intended for radiation protection is as vital as its bioavailability in the specific tissues and organs, where the short-lived ROS are produced during radiation exposure. In this review article, we summarized the current status of the development of radioprotective agents, including our self-assembling radioprotective agents.
- self-assembling redox nanoparticles,
- nitroxide,
- reactive oxygen species,
- ionizing radiation,
- radiation protection,
- radioprotective agent,
- biodistribution,
- blood circulation of nanoparticles
Citation: Chitho P. Feliciano, Sandrine Cammas-Marion, Yukio Nagasaki. Recent advances in self-assembling redox nanoparticles as a radiation protective agent[J]. AIMS Molecular Science, 2023, 10(1): 52-69. doi: 10.3934/molsci.2023005

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Abstract

The search for potent radiation-protective drugs for clinical use continues. Studies have, so far, focused on targeting the neutralization of radiation-generated reactive oxygen species (ROS) to protect the cells against the deleterious effects of exposure to ionizing radiation. However, the development of efficacious radioprotective drugs, which are mostly low molecular weight (LMW) compounds, is mainly limited due to their inherent toxicity and rapid excretion from the body. Thus, researchers reformulated these LMW compounds into nano-based formulations. This review discusses recent advances in the use of self-assembling redox nanoparticles as a new group of radioprotective agents. The copolymer micelle (herein referred to as redox nanoparticles; RNP) contains an active part, amino-TEMPO, that effectively scavenges radiation-induced ROS in the body, as demonstrated in vivo. With the use of nanoparticle-based technologies, optimized formulations of these LMW ROS-neutralizers lead to the significant reduction of its toxicity, high bioavailability and longer blood circulation, which consequently resulted in its notable enhanced efficacy (for example, increased survival rate, reduced radiation-induced syndromes and organ damage) against the damaging effects of ionizing radiation. Consistent with the available data on the use of RNP and other nano-based radioprotective agents, it can be concluded that the inherent ROS-targeting activity of a drug intended for radiation protection is as vital as its bioavailability in the specific tissues and organs, where the short-lived ROS are produced during radiation exposure. In this review article, we summarized the current status of the development of radioprotective agents, including our self-assembling radioprotective agents.

Acknowledgments

Author Contributions: writing—original draft preparation, writing—review, and editing, C.P. Feliciano; writing-review and editing, S. Cammas-Marion; writing—review and editing, Y. Nagasaki.

Conflicts of Interest

We declare no conflicts of interest.

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