Edimer Pharmaceuticals, Inc.

The proposed natural history study will enroll male and female patients, ages 36 months and younger, who have a diagnosis of XLHED based on genetic testing and who have not received an investigational study drug. The study protocol will include collection of all relevant medical history and documentation of clinical outcomes using age-appropriate, minimally invasive technologies. Data will be collected both retrospectively, back to pregnancy assessments that may be available, and prospectively through age 5 yrs.

The goal of the ECP-002e extension study is to continue the evaluation of all EDI200-treated ECP-002 subjects up to age 10 yrs. No additional study drug administration is planned. The efficacy evaluations will incorporate growth and development parameters, frequency of infections and hospitalizations, and age-appropriate assessments of ectoderm-derived organ function. The safety evaluations will include physical examinations, adverse events and concomitant medication documentation, and laboratory testing. Funding Source - FDA OOPD

The current study design incorporates two previously developed, non-invasive approaches to characterize the phenotype of individuals affected with XLHED.