BICC1 is an RNA-binding protein that regulates multiple cellular pathways critical for kidney function and tumorigenesis. As a negative regulator of Wnt signaling [UniProt], BICC1 functionally interacts with polycystin-1 and polycystin-2 proteins; depletion of Bicc1 in conjunction with Pkd1 or Pkd2 loss results in aggravated polycystic kidney disease in animal models and human patients, indicating BICC1's protective role in kidney cyst formation 1. In chr10 kidney disease progression, BICC1 variants are associated with slower eGFR decline, suggesting a renoprotective function 2. In pancreatic cancer, BICC1 drives stemness and chemoresistance by facilitating tryptophan metabolism through IDO1 upregulation, promoting NAD+ synthesis and oxidative phosphorylation 3. BICC1 also drives VEGF-independent angiogenesis by post-transcriptionally upregulating Lipocalin-2 (LCN2) mRNA via 3'UTR binding, activating JAK2/STAT3 signaling and CXCL1 production 4. Additionally, BICC1 promotes epithelial-mesenchymal transition and immune cell infiltration, correlating with lymph node metastasis and poor prognosis 5. BICC1 is also implicated in epigenetic regulation of muscle hypertrophy, showing hypomethylation and enhanced expression after resistance exercise 6.