AVROBIO, a US-based company, developing lentiviral-based gene therapies, has announced that the U.S. Food and Drug Administration (FDA) has granted orphan-drug designation for the Company’s investigational gene therapy, AVR-RD-02, for the treatment of Gaucher disease. What is AVR-RD-02: AVR-RD-02 consists of the patient’s own hematopoietic stem cells, genetically modified to express glucocerebrosidase (GCase), the enzyme that is deficient