In addition to approved therapies, scientists are investigating a number of experimental approaches to treat the disease. These would need regulatory approval before patients could use them.
Enzyme replacement therapy
PRX-102 is an experimental ERT that’s similar to Fabrazyme, an approved ERT. It consists of a copy of the human enzyme alpha-galactosidase A, which is produced in genetically modified plant cells and then chemically modified. The manufacturer, Protalix Biopharmaceuticals, says this makes the enzyme molecule more active and stable than the active ingredient in Fabrazyme. PRX-102 is being tested in Phase 3 clinical trials.
Gene therapy has been successful in animals, allowing them to make their own alpha-galactosidase A enzyme, the enzyme that is deficient in Fabry disease.
Several companies are working on developing gene therapies for Fabry disease.
Sangamo Therapeutics is testing ST-920 in Phase 1/2 clinical trials.
Substrate reduction therapy
Venglustat is an oral treatment for Fabry disease. It blocks a step in the chemical process that forms Gb3, the fatty molecule that patients’ bodies are unable to break down. Its developer, Sanofi Genzyme, has been testing it in Phase 2 clinical trials.
Apabetalone (RVX-208) is an oral medication being developed by Resverlogix for the treatment of Fabry disease, among others. It is a selective BET (bromodomain and extra-terminal) inhibitor that can regulate disease-causing genes. Researchers will test the treatment in a Phase 1/2 clinical trial.
Last updated: Aug. 20, 2020
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