Overview of PROTAC degraders in clinical trials for cancer treatment. AR: androgen receptor; BCL-xL: B-cell lymphoma-extra large; BRAF: v-raf murine sarcoma viral oncogene homolog B1; BRD: bromodomain-containing protein; BTK: Bruton’s tyrosine kinase; DLBCL: diffuse large B cell lymphoma; EGFR: epidermal growth factor receptor; ER: estrogen receptor; IND: investigational new drug, LGL: large granular lymphocyte; mCRPC: metastatic castration-resistant prostate cancer; MDM2: mouse double minute 2; NSCLC: non-small cell lung cancer; NTRK: neurotrophic tyrosine receptor kinase; R/R: relapsed/refractory; SMARCB1: SWI/SNF related, matrix associated, actin dependent regulator of chromatin, subfamily B, member 1; STAT3: signal transducer and activator of transcription 3.