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Publication - Professor Paul Martin

    MiR-142 Is Required for Staphylococcus aureus Clearance at Skin Wound Sites via Small GTPase-Mediated Regulation of the Neutrophil Actin Cytoskeleton

    Citation

    Tanaka, K, Kim, SE, Yano, H, Matsumoto, G, Ohuchida, R, Ishikura, Y, Araki, M, Araki, K, Park, S, Komatsu, T, Hayashi, H, Ikematsu, K, Tanaka, K, Hirano, A, Martin, P, Shimokawa, I & Mori, R, 2017, ‘MiR-142 Is Required for Staphylococcus aureus Clearance at Skin Wound Sites via Small GTPase-Mediated Regulation of the Neutrophil Actin Cytoskeleton’. Journal of Investigative Dermatology, vol 137., pp. 931?940

    Abstract

    MicroRNAs (miRNAs) are small noncoding RNAs that regulate protein
    translation by binding to complementary target mRNAs. We previously
    identified two mature members of the miR-142 family, miR-142-5p and miR-142-3p,
    as inflammation-related miRNAs with potential roles in wound healing.
    Here, we demonstrated that these two miRNAs are prominently expressed in
    wound-infiltrated neutrophils and macrophages and play central roles in
    wound healing. We generated miR-142−/− mice using the exchangeable gene-trap method and showed that healing of Staphylococcus aureus-infected skin wounds was significantly delayed in miR-142−/− mice compared with that in wild-type mice. MiR-142−/− mice exhibited abnormal abscess formation at S. aureus-infected skin wound sites and were also more susceptible to horizontal transmission of wound infections. MiR-142−/−
    neutrophils showed altered phagocytosis as a consequence of chemotactic
    behavior, including enhanced F-actin assembly, disturbed cell polarity,
    and increased cell motility. We showed that these changes were linked
    to cytoskeletal regulation, and that expression of the small GTPases was
    markedly increased in miR-142−/− neutrophils. Collectively, our data demonstrate that the miR-142 family is indispensable for protection against S. aureus infection and its clearance at wound sites. MiR-142-3p and miR-142-5p play nonredundant roles in actin cytoskeleton regulation by controlling small GTPase translation in neutrophils at wound sites.

    Full details in the University publications repository