Distinct Roles for Dectin-1 and Dectin-2 in Skin Wound Healing and Neutrophilic Inflammatory Responses

Kenji Yamaguchi, Emi Kanno, Hiromasa Tanno, Ayako Sasaki, Yuki Kitai, Takayuki Miura, Naoyuki Takagi, Miki Shoji, Jun Kasamatsu, Ko Sato, Yuka Sato, Momoko Niiyama, Yuka Goto, Keiko Ishii, Yoshimichi Imai, Shinobu Saijo, Yoichiro Iwakura, Masahiro Tachi, Kazuyoshi Kawakami

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)


C-type lectin receptors recognize microbial polysaccharides. The C-type lectin receptors such as dendritic cell-associated C-type lectin (Dectin)-1 and Dectin-2, which are triggered by β-glucan and α-mannan, respectively, contribute to upregulation of the inflammatory response. Recently, we demonstrated that activation of the Dectin-2 signal delayed wound healing; in previous studies, triggering the Dectin-1 signal promoted this response. However, the precise roles of these C-type lectin receptors in skin wound healing remain unclear. This study was conducted to determine the roles of Dectin-1 and Dectin-2 in skin wound healing, with a particular focus on the kinetics of neutrophilic inflammatory response. Full-thickness wounds were created on the backs of C57BL/6 mice, and the effects of Dectin-1 or Dectin-2 deficiency and those of β-glucan or α-mannan administration were examined. We also analyzed wound closure, histological findings, and neutrophilic inflammatory response, including neutrophil extracellular trap formation at the wound sites. We found that Dectin-1 contributed to the acceleration of wound healing by inducing early-phase neutrophil accumulation, whereas Dectin-2 was involved in prolonged neutrophilic responses and neutrophil extracellular trap formation, leading to delayed wound healing. Dectin-2 deficiency also improved collagen deposition and TGF-β1 expression. These results suggest that Dectin-1 and Dectin-2 have different roles in wound healing through their different effects on the neutrophilic response.

Original languageEnglish
Pages (from-to)164-176.e8
JournalJournal of Investigative Dermatology
Issue number1
Publication statusPublished - 2021 Jan


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