PTBP1 and hemoglobin measurement: A recent study by Zhu et al. revealed that circ-CCT2 stabilizes polypyrimidine tract-binding protein 1 (PTBP1) mRNA and activates the Wnt/β-catenin signaling pathway by recruiting and upregulating the TAF15 protein, thereby promoting the progression of HB and suggesting potential therapeutic targets [37].