%0 Journal Article %T Targeted Recruitment and Degradation of Estrogen Receptor α by Photothermal Polydopamine Nanoparticles for Breast Tumor Ablation. %A Zhang Y %A Ding X %A Xie F %A Gao M %A Qiu J %A Wang Z %A Qing L %A Yan J %A Peng N %A Li Y %A Xu J %A Cai Q %A Jin Y %A Jiao Y %A Liu Y %A He H %A Zhang S %J Adv Healthc Mater %V 11 %N 19 %D 10 2022 %M 35833876 %F 11.092 %R 10.1002/adhm.202200960 %X The major challenges of photothermal therapy (PTT) toward clinical application are the severe skin injury and inflammation response associated with high power laser irradiation. Herein, polydopamine nanoparticles (PDA-EST and PDA-RAL) targeted to estrogen receptor α (ERα) for efficient ablation of breast tumor under a low irradiation density of 0.1 W cm-2 are reported. These nanoparticles are capable of recruiting ERα on their surface and induce a complete ERα degradation via localized heat. Owing to the ERα targetability, PDA-EST and PDA-RAL strongly suppress the proliferation of breast cancer cells without causing significant inflammation. This work provides a generalized method for enhancing PTT efficacy under low irradiation density.