Sandra Beltran explains her ‘lessons learned’ Living with Alagille Syndrome & Liver Transplant: challenges, lessons and partnerships. Alagille syndrome is an autosomal dominant disorder, which for most people with Alagille syndrome causes a mutation, or defect, in the Jagged1 (JAG1) gene. Mutations in the NOTCH2 gene are seen in less than 1 percent of people with … More “A diagnosis is not a life sentence”