FOSTER CITY, Calif.--(BUSINESS WIRE)--Mirum Pharmaceuticals, Inc. (Nasdaq: MIRM), a leading rare disease company, today announced that the first participant has been enrolled in the BLOOM Phase 2 clinical study evaluating MRM-3379 in Fragile X syndrome (FXS). Caused by a mutation of the FMR1 gene, FXS is the most common inherited form of intellectual disability and autism spectrum disorder and affects an estimated 50,000 males in the U.S. and E.U. There are currently no approved therapies for t. ...