Protective effect of phloroglucinol against gamma radiation-induced oxidative stress in hair follicles

Kim, Areum; Bing, So Jin; Cho, Jinhee; Herath, KHINM; Jeon, You-Jin; Lee, Byung-Gul; Park, Jae-Woo; Jee, Youngheun

doi:2016.56.1.29

Korean J Vet Res > Volume 56(1); 2016 > Article

Original Article

Korean Journal of Veterinary Research 2016;56(1):29-35.
DOI: https://doi.org/10.14405/kjvr.2016.56.1.29 Published online May 2, 2016.

Protective effect of phloroglucinol against gamma radiation-induced oxidative stress in hair follicles

Areum Kim¹, So Jin Bing², Jinhee Cho², KHINM Herath², You-Jin Jeon³, Byung-Gul Lee⁴, Jae-Woo Park⁵, Youngheun Jee¹

¹Department of Advanced Convergence Technology & Science, Jeju National University
²Department of Veterinary Medicine, Jeju National University
³Department of Marine Life Sciences, Jeju National University
⁴Department of Civil and Enviromental Engineering, Jeju National University
⁵Department of Nuclear and Energy Engineering, Jeju National University

방사선으로 인한 산화적 손상에서 phloroglucinol의 모낭 보호 효과

김아름¹, 빙소진², 조진희², ², 전유진³, 이병걸⁴, 박재우⁵, 지영흔¹

¹제주대학교 차세대융복합과학기술협동과정
²제주대학교 수의과대학 수의학과
³제주대학교 해양과학대학 수산생명의학전공
⁴제주대학교 해양과학대학 토목공학과
⁵제주대학교 공과대학 에너지공학과

Abstract

When exposed to gamma-rays, hair follicular cells immediately go through apoptosis, which hampers their rapid differentiation essential for the regeneration of hair. Phloroglucinol (PG) is a phenolic compound of Ecklonia cava, brown algae abundant in Jeju island, Korea. Containing plentiful polyphenols, PG is known for its instructive effects by inhibiting apoptosis, scavenging oxygen radicals, and protecting cells against oxidative stress. In this study, we demonstrate that PG rescues radiosensitive hair follicular cells from gamma radiation-induced apoptosis and DNA damage. To identify protective capacity of PG on hair follicles, we irradiated with 8.5 Gy (1.5 Gy/min) of gamma-rays to the whole body of C57BL/6 mice at day 6 after depilation with or without PG. In mice exposed to radiation, the expression of proapoptotic molecule p53 was downregulated in the skin of PG treated group. On immunohistochemical observation of the skin, PG inhibited the immunoreactivity of p53 and cleaved caspase-3. PG treatment protected hair follicular cells from cell death due to gamma-radiation. Our results suggest that PG presents radioprotective effects by inhibiting apoptosis of radiosensitive hair follicular cells and can protect hair follicular cells from gamma-ray induced damage.

Key Words: gamma-ray, hair follicular cells, oxidative stress, phloroglucinol, radioprotection