Stanford University
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Cholawat Pacharinsak, DVM, PhD
Professor of Comparative Medicine
BioCholawat Pacharinsak, DVM, PhD Professor and Director of Anesthesia, Pain Management, and Surgery, at Stanford University’s Department of Comparative Medicine; he is a Diplomate of the American College of Veterinary Anesthesia and Analgesia (DACVAA). He received his DVM from Chulalongkorn University, Thailand and trained in an Anesthesiology/Pain Management residency program and received his Master's degree at Washington State University. He completed his PhD in Comparative and Molecular Biosciences from the University of Minnesota. Prior to arriving at Stanford, Dr. Pacharinsak was a faculty member in Anesthesiology and Pain Management at Michigan State University and Purdue University; and served as a Clinical Specialist at UCLA’s David Geffen School of Medicine. His research focuses on understanding the neurobiology of cancer pain, chemotherapeutic-induced peripheral neuropathy, acute surgical pain models, and methods to improve clinical pain management e.g. sustained release analgesics supporting refinement. Research methodology includes electrophysiologic and behavioral techniques.
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Simone Paci
Lecturer, Political Science
BioSimone Paci is a quantitative social scientist whose research and teaching spans political economy topics across public policy domains. His main three areas of research include taxation, AI, and gender politics.
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Amado Padilla
Associate Dean for Faculty Affairs and Vida Jacks Professor of Education
Current Research and Scholarly InterestsCurrent projects include: (a) the development of models of ethnic identity that incorporate social cognition theory and social identity; (b)acculturation stress and mental health status across three generations of Latinos; (c) home, school and community protective factors that empower Latino students to succeed academically; (d) learning of Mandarin by high school students in summer intensive programs vs. students in regular high school world language classes; and (e) student language and academic content learning in a Mandarin/English dual language immersion program.
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Marshall Scott Padilla
Acting Assistant Professor, Materials Science and Engineering
Assistant Professor, Materials Science and EngineeringBioMarshall Scott Padilla will begin as an Assistant Professor of Materials Science and Engineering and a Sarafan ChEM-H Institute Scholar at Stanford in September 2026 pending University approval. His research takes a rational-design approach to RNA medicine, engineering lipids and lipid nanoparticles (LNPs) that deliver RNA and proteins to specific cells. Rather than relying on empirical, large-scale screening, he couples the synthesis of structurally defined lipid libraries with multimodal biophysical characterization and in vivo screening to extract the structure–activity relationships that govern delivery.
His research group aims to move beyond the field's default of hepatic delivery toward LNPs that direct RNA and protein cargoes to defined cell types, enabling durable and precise therapies. Group interests span ionizable lipid synthesis, gene editing, cancer immunotherapy, ionic liquids, mapping endosomal escape, and the analytical and biophysical methods needed to relate nanoparticle structure to function. He is broadly interested in establishing generalizable chemical and structural principles for the next generation of delivery vehicles.
Prior to joining Stanford, Marshall was an NIH postdoctoral fellow in the Department of Bioengineering at the University of Pennsylvania with Prof. Michael J. Mitchell, where he developed the Branched ENdosomal Disruptor (BEND) lipid architecture for mRNA and CRISPR-Cas9 delivery (Nature Communications, 2025), advanced solution-based biophysical methods for characterizing LNP structure (Nature Biotechnology, 2025), and engineered LNPs co-delivering mRNA and small-molecule drugs for oral cancer chemoimmunotherapy (Advanced Materials, accepted). He completed his PhD in Chemistry (Chemical Biology) at the University of Wisconsin–Madison and his B.S. in Chemistry at the College of William & Mary. His work has been recognized by the Society for Biomaterials (Burroughs Wellcome Fund BioInterfaces Rising Star Award), the American Association for Dental, Oral, and Craniofacial Research (Hatton Award, postdoctoral first place), and an NIH/NIDCR T90 fellowship. -
Ryan Christopher Padrez
Clinical Professor, Pediatrics - General Pediatrics
BioRyan is a Clinical Associate Professor of Pediatrics at Stanford University's Division of General Pediatrics. His primary clinical practices are at Gardner Packard Children's Health Center and Lucile Packard Children's Hospital. In addition to his work at Stanford, Ryan also serves as the Medical Director for The Primary School, a new integrated health and education model that serves low income children and families in East Palo Alto, CA. His work and leadership focuses on the intersection and reform of primary pediatric care and early childhood education. He works to integrate systems and promote models that ensure high quality care is accessible to all children.
Ryan graduated from Stanford University with a BA in Human Biology and earned his MD at University of California, San Francisco (UCSF). He completed his pediatric residency at UCSF and participated in UCSF's Pediatric Leadership for the Underserved (PLUS) program. He went on to complete a chief resident year at The San Francisco General Hospital and Trauma Center.
