Injured tubular epithelia-derived CCN1 promotes the mobilization of fibroblasts toward injury sites after kidney injury.

ABSTRACT: Humoral factors that prompt fibroblasts to migrate to an injury site at an appropriate time point are deemed indispensable for repair after kidney injury. We herein demonstrated the pivotal roles of injured tubule-derived cellular communication network factor 1 (CCN1) in the mobilization of fibroblasts to the injury site after kidney injury. Based on analyses of ligand-receptor interactions in vitro and tubular epithelial-specific transcriptomics in vivo, we identified the up-regulation of CCN1 during the early phases of kidney injury. CCN1 promotes fibroblast chemotaxis through focal adhesion kinase-extracellular signal-regulated kinase (ERK) signaling. In vivo analyses utilizing tubular-specific CCN1 knockout (KO) mice demonstrated the sparse accumulation of f

SUBMITTER: Nakata T 

PROVIDER: S-EPMC11987671 | biostudies-literature | 2025 Apr

REPOSITORIES: biostudies-literature