한빛사논문
Dongwon Kim1,6,*, Ruosi Chen1,2,6, Mary Sheu1, Noori Kim1, Sooah Kim1, Nasif Islam1, Eric M. Wier1, Gaofeng Wang1,2, Ang Li1, Angela Park1, Wooyang Son1, Benjamin Evans1, Victoria Yu1, Vicky P. Prizmic1, Eugene Oh1, Zixiao Wang1, Jianshi Yu3, Weiliang Huang3, Nathan K. Archer1, Zhiqi Hu2, Nashay Clemetson1, Amanda M. Nelson4, Anna Chien1, Ginette A. Okoye1, Lloyd S. Miller1, Gabriel Ghiaur5, Sewon Kang1, Jace W. Jones3, Maureen A. Kane3 & Luis A. Garza1,*
1 Department of Dermatology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA. 2 Department of Plastic and Aesthetic Surgery, Nanfang Hospital of Southern Medical University, Guangzhou 510515 Guangdong Province, China. 3 Department of Pharmaceutical Sciences, School of Pharmacy, University of Maryland, Baltimore, MD 21201, USA. 4 Department of Dermatology, College of Medicine, The Pennsylvania State University, Hershey, PA 17033, USA. 5 Sidney Kimmel Cancer Center at Johns Hopkins, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA. 6 These authors contributed equally: Dongwon Kim, Ruosi Chen.
*Correspondence and requests for materials should be addressed to D.K. or to L.A.G.
Abstract
How developmental programs reactivate in regeneration is a fundamental question in biology. We addressed this question through the study of Wound Induced Hair follicle Neogenesis (WIHN), an adult organogenesis model where stem cells regenerate de novo hair follicles following deep wounding. The exact mechanism is uncertain. Here we show that self-noncoding dsRNA activates the anti-viral receptor toll like receptor 3 (TLR3) to induce intrinsic retinoic acid (RA) synthesis in a pattern that predicts new hair follicle formation after wounding in mice. Additionally, in humans, rejuvenation lasers induce gene expression signatures for dsRNA and RA, with measurable increases in intrinsic RA synthesis. These results demonstrate a potent stimulus for RA synthesis by non-coding dsRNA, relevant to their broad functions in development and immunity.
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