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Abstract
Radiotherapy is one of the most efficient ways to treat cancer. However, deleterious effects, such as acute and chronic toxicities that reduce the quality of life, may result. Naturally occurring compounds have been shown to be non-toxic over wide dose ranges and are inexpensive and effective. Additionally, pharmacological strategies have been developed that use radioprotectors to inhibit radiation-induced toxicities. Currently available radioprotectors have several limitations, including toxicity. In this review, we present the mechanisms of proven radioprotectors, ranging from free radical scavenging (the best-known mechanism of radioprotection) to molecular-based radioprotection (e.g., upregulating expression of heat shock proteins). Finally, we discuss naturally occurring compounds with radioprotective properties in the context of these mechanisms.

Author information

Mun GI1, Kim S1, Choi E1, Kim CS2, Lee YS3.
1
Graduate School of Pharmaceutical Sciences, Ewha Womans University, Seoul, 120-750, Korea.
2
Radiation Health Institute, Korea Hydro & Nuclear Power CO., LTD, 172, Dolmr-ro, Seongnam-si, Gyeonggi-do, 13605, Korea. chasoon.kim@khnp.co.kr.
3
Graduate School of Pharmaceutical Sciences, Ewha Womans University, Seoul, 120-750, Korea. yslee0425@ewha.ac.kr.