A review.The selection of linkers and payloads plays a crucial role indetermining the therapeutic indexes of antibody-drug conjugates(ADCs).As paclitaxel (PTX) has been used therapeutically in pancreaticcancer and TNBC, in which Trop-2 is highly expressed, it appears to be a viable payload option for Trop-2-targeting ADCs.In cancer cell lines with diverse Trop-2 expression levels, our results indicated that free drug PTX is not as potent as MMAE, but similar to SN38.ADC mols. employing PTX, hydrophilic linkers, and Trop-2 antibodies showed superior efficacy and safety profile in vitro and in vivo, suggesting that it is a promising targeted therapeutic for human carcinomas.