School of Medicine


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  • Sneha Ramakrishna

    Sneha Ramakrishna

    Assistant Professor of Pediatrics (Hematology/Oncology)

    BioSneha Ramakrishna obtained her B. A. from the University of Chicago and her M.D. from the Cleveland Clinic Lerner College of Medicine at Case Western Reserve University. In medical school, through the Howard Hughes Medical Research Scholar Award, she joined Dr. Crystal Mackall’s laboratory, where she designed and developed various GD2 CAR-Ts and tested them in preclinical models. During her residency training in Pediatrics at the Children’s Hospital of Philadelphia, she cared for some of the first patients treated with CD19 CAR T cells, learning the power of this therapy first-hand. During her fellowship in Pediatric Hematology/Oncology at the Johns Hopkins/National Cancer Institute combined program, she worked with Dr. Terry Fry. She evaluated the mechanism of CD22 CAR T cell relapse in patients by developing an antigen escape model and establishing a deeper understanding of the effects of antigen density on CAR-T phenotype, expansion, and persistence (Fry…Ramakrishna…Mackall Nat Med, 2018; Ramakrishna, et al., Clinical Cancer Research, 2019). Since arriving at Stanford, Dr. Ramakrishna leads an interdisciplinary team that designs, develops, and successfully implements a robust correlative science platform for our novel CAR-T therapies. Analyzing patient samples from our first-in-human GD2 CAR-T trial (NCT04196413) treating a universally fatal cancer, diffuse midline glioma (DMG), we identified that intracerebroventricular CAR-T administration correlates with enhanced pro-inflammatory cytokines and reduced immunosuppressive cell populations in cerebrospinal fluid as compared to intravenous CAR-T administration (Majzner*, Ramakrishna*, et al., Nature 2022 *co-first authors). Her research program evaluates unique sets of patient samples using novel single-cell immune profiling to identify the drivers of CAR-T success or failure. Building on these findings, her team will assess approaches to enhance CAR-T efficacy and translate these findings to the clinic.

    Clinically, Dr. Ramakrishna cares for children with solid tumors and treats hematologic, solid, and brain tumor pediatric patients with CAR T cell therapies in the Cancer Cellular Therapies program.

  • Nathan Reticker-Flynn, PhD

    Nathan Reticker-Flynn, PhD

    Assistant Professor of Otolaryngology - Head & Neck Surgery (OHNS)

    Current Research and Scholarly InterestsTo metastasize throughout our bodies, tumors subvert and co-opt our immune systems. Our lab seeks to uncover how these processes occur and develops therapies to put a stop to them.

  • Andrew Rezvani, M.D.

    Andrew Rezvani, M.D.

    Associate Professor of Medicine (Blood and Marrow Transplantation and Cellular Therapy)

    Current Research and Scholarly InterestsClinical research in allogeneic hematopoietic cell transplantation

  • Maria Grazia Roncarolo

    Maria Grazia Roncarolo

    George D. Smith Professor of Stem Cell and Regenerative Medicine and Professor of Medicine (Blood and Marrow Transplantation and Cellular Therapy)

    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