Figure 3.
CaSR signaling cascade in the kidney. A feedback control loop of CaSR regulation in the TALH includes the following key components: microRNAs (miR-9 and miR-374) and claudin-14. Claudin-14 negatively regulates claudin-16 and -19 permeability via direct interaction. MicroRNAs regulate claudin-14 mRNA stability and translational efficacy. The gene transcription of microRNAs themselves is regulated by the transcriptional factor – NFAT and via deacetylation of nearby histone molecules. NFAT: nuclear factor of activated T cells; CsA: cyclosporine A; SAHA: suberanilohydroxamic acid.