BODIPY−DOX

BODIPY-DOX is a conjugate composed of BODIPY and Doxorubicin (HY-15142A), as well as a pH-activated fluorescent probe for M1 macrophages and an apoptosis inducer. BODIPY-DOX undergoes pH-induced hydrazone bond cleavage in acidic M1 macrophage phagosomes, thereby releasing cytotoxic Doxorubicin (Dox) and inhibiting the function of pro-inflammatory M1 macrophages. BODIPY-DOX highly selectively inhibits the production of relevant pro-inflammatory cytokines by mouse and human monocyte-derived M1 macrophages, while exerting minimal effects on M2 or unactivated macrophages. Therefore, BODIPY-DOX enables simultaneous fluorescent tracing, differentiation and elimination of specific macrophage subsets, and exhibits the potential to regulate tissue regeneration in zebrafish models^[1].