Farber disease is an ultra-rare lysosomal storage disease caused by a mutation in both alleles of the ASAH1 gene, resulting in the deficiency of the lysosomal enzyme acid ceramidase. This leads to the accumulation of the pro-inflammatory sphingolipid ceramide, and a macrophage driven inflammatory process causing the development of typical clinical symptoms. Like many other lysosomal storage diseases, Farber disease has a broad phenotypic spectrum, and is likely underdiagnosed.

Farber patients typically present with the cardinal symptoms of:

  • Joint contractures or arthritis

  • Subcutaneous nodules

  • Weak or hoarse voice

It may take years for all three cardinal symptoms to appear together, and they may vary greatly in severity. Patients may also present with systemic inflammation (fever), severe pain, peripheral osteolysis, failure to thrive, and developmental delay.

In addition to Farber disease, a mutation in the ASAH1 gene and the resulting acid ceramidase deficiency may also lead to a severe neurological disorder called spinal muscular atrophy with progressive myoclonic epilepsy (SMA-PME) that causes muscle weakness and wasting (atrophy) and a combination of seizures and uncontrollable muscle jerks (myoclonic epilepsy).

If you know of a child with Farber disease, or are a physician interested in collaboration, please get in touch with the Enzyvant team at medinfo@enzyvant.com

For more information on RVT-801 (rhAC), a new investigational therapy for the treatment of Farber disease CLICK HERE

For more information about Farber disease.