Abl family tyrosine kinases govern IgG extravasation in the skin in a murine pemphigus model

Sachiko Ono, Gyohei Egawa, Takashi Nomura, Akihiko Kitoh, Teruki Dainichi, Atsushi Otsuka, Saeko Nakajima, Masayuki Amagai, Fumi Matsumoto, Mami Yamamoto, Yoshiaki Kubota, Toshiyuki Takai, Tetsuya Honda, Kenji Kabashima

研究成果: Article査読

4 被引用数 (Scopus)


The pathway of homeostatic IgG extravasation is not fully understood, in spite of its importance for the maintenance of host immunity, the management of autoantibody-mediated disorders, and the use of antibody-based biologics. Here we show in a murine model of pemphigus, a prototypic cutaneous autoantibody-mediated disorder, that blood-circulating IgG extravasates into the skin in a time- and dose-dependent manner under homeostatic conditions. This IgG extravasation is unaffected by depletion of Fcγ receptors, but is largely attenuated by specific ablation of dynamin-dependent endocytic vesicle formation in blood endothelial cells (BECs). Among dynamin-dependent endocytic vesicles, IgG co-localizes well with caveolae in cultured BECs. An Abl family tyrosine kinase inhibitor imatinib, which reduces caveolae-mediated endocytosis, impairs IgG extravasation in the skin and attenuates the murine pemphigus manifestations. Our study highlights the kinetics of IgG extravasation in vivo, which might be a clue to understand the pathological mechanism of autoantibody-mediated autoimmune disorders.

ジャーナルNature communications
出版ステータスPublished - 2019 12月 1

ASJC Scopus subject areas

  • 化学一般
  • 生化学、遺伝学、分子生物学一般
  • 物理学および天文学一般


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