Flamingo Therapeutics BV and Ionis Pharmaceuticals Inc.’s FTX-001 (also known as FLM-7523) is a potential first-in-class antisense oligonucleotide (ASO) targeting the human metastasis-associated lung adenocarcinoma transcript 1 (MALAT1) long noncoding RNA (lncRNA); it is being developed for the treatment of cancer.