School of Medicine


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  • Matthew Porteus

    Matthew Porteus

    Sutardja Chuk Professor of Definitive and Curative Medicine

    BioDr. Porteus was raised in California and was a local graduate of Gunn High School before completing A.B. degree in “History and Science” at Harvard University where he graduated Magna Cum Laude and wrote an thesis entitled “Safe or Dangerous Chimeras: The recombinant DNA controversy as a conflict between differing socially constructed interpretations of recombinant DNA technology.” He then returned to the area and completed his combined MD, PhD at Stanford Medical School with his PhD focused on understanding the molecular basis of mammalian forebrain development with his PhD thesis entitled “Isolation and Characterization of TES-1/DLX-2: A Novel Homeobox Gene Expressed During Mammalian Forebrain Development.” After completion of his dual degree program, he was an intern and resident in Pediatrics at Boston Children’s Hospital and then completed his Pediatric Hematology/Oncology fellowship in the combined Boston Chidlren’s Hospital/Dana Farber Cancer Institute program. For his fellowship and post-doctoral research he worked with Dr. David Baltimore at MIT and CalTech where he began his studies in developing homologous recombination as a strategy to correct disease causing mutations in stem cells as definitive and curative therapy for children with genetic diseases of the blood, particularly sickle cell disease. Following his training with Dr. Baltimore, he took an independent faculty position at UT Southwestern in the Departments of Pediatrics and Biochemistry before again returning to Stanford in 2010 as an Associate Professor. During this time his work has been the first to demonstrate that gene correction could be achieved in human cells at frequencies that were high enough to potentially cure patients and is considered one of the pioneers and founders of the field of genome editing—a field that now encompasses thousands of labs and several new companies throughout the world. His research program continues to focus on developing genome editing by homologous recombination as curative therapy for children with genetic diseases but also has interests in the clonal dynamics of heterogeneous populations and the use of genome editing to better understand diseases that affect children including infant leukemias and genetic diseases that affect the muscle. Clinically, Dr. Porteus attends at the Lucille Packard Children’s Hospital where he takes care of pediatric patients undergoing hematopoietic stem cell transplantation.

  • Maria Grazia Roncarolo

    Maria Grazia Roncarolo

    George D. Smith Professor of Stem Cell and Regenerative Medicine, Emerita

    Current Research and Scholarly InterestsResearch Interests
    Immunetolerance: Mechanisms underlying T-cell tolerance, induction of T-cell anergy and regulatory T cells; Immunomodulation: mAbs, proteins and low molecular weight compounds which can modulate T-cell activation; Primary immunodeficiencies: Characterization of molecular and immunological defects; Gene therapy: Gene transduction of hematopoietic cells for gene therapy in primary immunodeficiencies and metabolic diseases; Hematopoiesis: Mechanisms underlying growth and differentiation of hematopoietic stem cells; Transplantation: Immune reconstitution and T-cell tolerance after allogenic stem cell transplantation; Cytokines/Cytokine receptors: Role in regulation of immune and inflammatory responses

    Clinical Interests
    Primary Immunodeficiencies
    Monogenic Autoimmune Disorders
    Allogenic Bone Marrow Transplantation
    Gene Therapy Clinical Trials
    Cell Therapy Clinical Trials
    Clinical Trials in Autoimmune Diseases and Organ Transplantation
    Clinical Trials in Hemoglobinopathies

  • Ami J. Shah

    Ami J. Shah

    Clinical Professor, Pediatrics - Stem Cell Transplantation

    BioDr. Shah joined Stanford University in 2015 as a Clinical Professor of Pediatrics in the Division of Hematology/ Oncology, Stem Cell Transplantation and Regenerative Medicine. Dr. Shah completed medical school at the University of North Carolina- Chapel Hill. She completed her training in Pediatrics and Pediatric Hematology/ Oncology at Childrens Hospital Los Angeles. Her areas of clinical expertise have been in stem cell transplantation for malignant and non-malignant disorders. She has been actively involved with the care and treatment of children with primary immune deficiencies and is the site PI for the Primary Immune Deficiencies Consortium (PIDTC). She has experience in numerous gene therapy trials for primary immune deficiencies, hemoglobinopathies and other genetic diseases. She has a specific interest in the long term outcomes following HSCT, in specific the neurocognitive function post HSCT. She has been an active participant in American Society of Transplantation and Cellular Therapy (ASTCT), Children's Oncology Group (COG) and American Society of Hematology (ASH).

    She has been actively involved with mentorship and graduate medical education, and currently serves as the Program Director for the Pediatric Hematology/ Oncology Fellowship and the Pediatric Stem Cell Fellowship. She also serves on the Pediatric Mentoring Group.

  • Katja Gabriele Weinacht, MD, PhD

    Katja Gabriele Weinacht, MD, PhD

    Assistant Professor of Pediatrics (Stem Cell Transplantation and Regenerative Medicine)

    Current Research and Scholarly InterestsPediatric Hematopoietic Stem Cell Transplantation
    DiGeorge Syndrome
    Genetic Immune Diseases
    Immune Dysregulation