This cluster of papers explores the multifaceted role of Clusterin, a chaperone protein, in cancer development, progression, and therapy. It investigates its involvement in apoptosis inhibition, TGF-ß signaling modulation, angiogenesis promotion, chemoresistance, and its potential as a biomarker for various cancers. The papers also discuss the implications of Clusterin in metastasis, particularly in prostate cancer.