LO-3-61 is a JQ-1 analog featuring a truncated fumarylamide group, classified as a BRD4 degrader with PROTAC (protein degradation targeting chimera) properties. It promotes the degradation of both long and short BRD4 isoforms via a CUL4DCAF16-dependent pathway. In MDA-MB-231 cells, LO-3-61 exhibits selectivity in degrading BRD3 and BRD4.
