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All times are Eastern (, )

Time (ET) Lecture Title/Event Summary Planned Speaker Day 1: Overview and International Perspectives: Clinical Experience (Wednesday, September 22, 2021)

Session Co-Chairs: Matthias Baumgartner, University Children’s Hospital, Zurich, Switzerland, Gerard Berry, Children’s Hospital, United States, & Cynthia Le Mons, National Urea Cycle Disorders Foundation, Pasadena, United States 1100-1110 Welcome Andrea Gropman and Cynthia Le Mons, Symposium Co-Chairs 1110-1120 Session Introduction Gerard Berry, Session Scientific Program Chair 1120-1135 Overview of UCD and Australian Experience Bridget Wilcken, Children’s Hospital at Westmead, Sydney, Australia 1135-1150 Overview if UCD in Japan Fumio Endo, Kumamoto University School of Medicine, Japan 1150-1205 Overview of UCD in Middle East Overviews and perspectives on the UCD Sarar Mohamed, King Saud University, Riyadh, Saudi Arabia clinical experience and recent research from 1205-1220 The Challenge of Elucidating/Understanding Stefan Kölker, University Children’s, Heidelberg, Germany around the globe. Phenotypic Diversity

1220-1235 Overview of UCD in Soledad Kleppe, Hospital Italiano de Buenos Aires, Argentina 1235-1250 UCDC – Knowledge Gaps and Unknowns Susan A. Berry, University of Minnesota, Minneapolis, United States 1250-1330 Discussion Panel Open discussions with all speakers Moderators: Gerard Berry & Matthias Baumgartner 1330-1430 Poster Session Juniorfrom session Investigator/trainees present their Lead: Sandesh Nagamani research Day 2: Biomarkers and Outcomes: Clinical Trial Readiness (Thursday, September 23, 2021)

Session Co-Chairs: Lindsay Burrage, Baylor College of Medicine, Houston, United States & Andrea Gropman, Children’s National, Washington, DC, United States 1100-1110 Session Introduction Andrea Gropman and Lindsay Burrage, Session Scientific Program Chairs 1110-1130 Impact of Medical Management on Long-Term Impact of medical management on the Roland Posset, University Children’s Hospital, Heidelberg, Germany Clinical Outcome cognitive outcome, intersects with age and stage of diagnosis 1130-1150 Neurocognitive Outcomes Related to Treatment of Clinical outcomes and clinical trial Greta Wilkening, Colorado Children’s Hospital, Aurora, United States UCD readiness 1150-1210 How Can Animal Models Inform Us About the Discussion of of research on Olivier Braissant, University of Basel, Switzerland Pathophysiology of HA and Impact on Brain? ammonia and how it impacts brain plasticity 1210-1230 EEG and Neuroimaging Studies: What Have We Biomarkers/early signs/monitoring using Andrea Gropman, Children’s National, Washington, DC, United States Learned and Early Biomarkers for Brain Injury in noninvasive neuromonitoring Clinical Trials 1230-1250 Animal Models: Blood Brain Barrier In Blood brain barrier, metabolite Jordan Kho, Baylor College of Medicine, Houston, United States UCD toxicity 1250-1310 FDA: Qualification of Biomarkers for Disease Review of FDA’s process for biomarker FDA speaker invited Presence, State, and Tracking selection and qualification 1310-1330 Chronic Hepatic Disease Chronic liver involvement in urea cycle Carlo Dionisi-Vici, Children’s Hospital, Rome, Italy disorders

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Time (ET) Lecture Title/Event Summary Planned Speaker 1330-1350 Prediction Models of Phenotypic Severity and Explores the use of modeling for long term Matthias Zielonka, University Children’s Hospital, Heidelberg, Germany Implications for Evaluation of Diagnostic and predictions for UCD Therapeutic Interventions 1350-1410 Biomarkers for Liver Disease in Urea Cycle Use of non-invasive imaging to evaluate liver Lindsay Burrage, Baylor College of Medicine, Houston, United States Disorders fibrosis 1410-1440 Discussion Panel Open discussions with all speakers from Moderators: Lindsay Burrage and Andrea Gropman session 1440-1540 Meet the Professor Networking Lead: Sandesh Nagamani Day 3: Diagnosis and Therapies (Friday, September 24, 2021)

Session Co-Chairs: Sandesh Nagamani, Baylor College of Medicine, Houston, United States & Oleg Shchelochkov, National Institutes of Health, Bethesda, United States 1100-1110 Session Introduction Sandesh Nagamani and Oleg Shchelochkov, Session Scientific Program Chairs 1110-1130 “Hi, my name is Zoey” A family’s perspective on diagnosis and John Zalusky, Zoey Zalusky’s family, United States treatment 1130-1150 Newborn Screening of UCDs The international perspective on the Orna Staretz-Chacham, Soroka Medical Center and Shlomo Almashanu, expanded newborn screening of UCDs NBS Program, Ministry of Health, Israel 1150-1210 Dietary Interventions in UCDs Management of Nitrogen Homeostasis Debra Hook, University of California, Davis, United States 1210-1230 Transplantation vs. Medical Management Transplant decisions George Mazariegos, Children’s Hospital , United States Outcomes 1230-1250 n-Carbamyl-glutamate in UCDs Studies in small molecules for UCD Nicholas Ah Mew, Children’s National, Washington, DC, United States 1250-1310 Summary of Novel Cell and Gene Directed Therapies managementThe dawn of n ovel genomic medicine in Ian Alexander, CMRI, Sydney, Australia UCDs 1310-1340 Discussion Panel Open discussions with all speakers from Moderators: Sandesh Nagamani & Oleg Shchelochkov 1340-1400 Closing Reception Networkingsession Roundtables Hosts: Andrea Gropman & Cynthia Le Mons

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