On February 13, Canadian biotech, Reserverlogix announced that facioscapulohumeral muscular dystrophy (FSHD) is one of two new indications it is pursuing involving its lead drug, apabetalone (RVX-208) which inhibits bromodomain and extra-terminal (BET) epigenetic readers. It mentioned research conducted at Saint Louis University demonstrating apabetalone mediated modulation of important targets in FSHD. The FSH Society funded seminal seed-funds to Dr. Fran Sverdrup at Saint Louis University starting in 2014 to conduct pilot research to study BET proteins as therapeutic targets in FSHD. It is still early days with respect to this research. Dr. Fran Sverdrup in response to inquiries he has received following the Resverlogix press release, along with the desire to start managing patient expectations about the status of BET inhibitors as a potential therapy for FSHD and research required to validate a candidate drug as an effective treatment, has put together the following Q&A to inform our readers about the status of BET inhibitors.
What are BET inhibitors? BET inhibitors are a class of drugs with anti-inflammatory and anti-cancer properties. Although no BET inhibitors are yet approved for use in the US or internationally, there are several clinical trials ongoing in the areas of cancer and cardiovascular disease. These drugs bind to and inhibit Bromodomain and Extra-Terminal motif (BET) proteins BRD2, BRD3, BRD4, and BRDT. Since BET proteins generally bind to active or “open” chromatin and turn on nearby genes, BET inhibitors act to suppress (turn off) genes that are over-expressed in disease settings. Continue reading