Maternal & Child Health Research Institute (MCHRI)
Showing 781-800 of 1,214 Results
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Ryan Christopher Padrez
Clinical Associate 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. -
Ria Pal
Clinical Assistant Professor, Pediatric Neurology
Current Research and Scholarly InterestsDr. Pal's research focuses on pediatric neurological conditions with emphasis on acquired brain injury (stroke, TBI, infection) and long-term outcomes in children. Her work examines the intersection of neurodevelopment with acute neurological injury. She is dedicated to advancing healthcare equity in neurological care delivery through education and policy.
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Theo Palmer
Professor of Neurosurgery, Emeritus
Current Research and Scholarly InterestsMembers of the Palmer Lab study the biology of neural stem cells in brain development and in the adult. Our primary goal is to understand how genes and environment synergize in influencing stem cell behavior during development and how mild genetic or environmental risk factors for disease may synergize in their detrimental effects on brain development or in the risk of neuronal loss in age-related degenerative disease.
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Carolyn K. Pan, MD
Clinical Professor, Ophthalmology
BioDr. Pan is a board-certified ophthalmologist and fellowship-trained vitreoretinal surgeon. She focuses on retinal vascular diseases, macular degeneration, and surgical repair of retinal detachments, macular pathology, and complications from cataract surgery. She has co-authored peer-reviewed articles on topics ranging from optical coherence tomography imaging to embryonic stem cells for macular degeneration.
In addition to her clinical practice, she is dedicated to the education and training of medical students, residents, and fellows. As recognition of her efforts, she received the Faculty Teaching Award in 2016 from the Byers Eye Institute at Stanford University and was the recipient of the national Women in Ophthalmology Educator Award in 2024. Within the department, she was the Associate Residency Program Director from 2020 to 2023, and currently serves as the Residency Program Director. Her educational efforts also extend beyond the department - since 2016, she has served on the annual meeting planning committee for the American Academy of Ophthalmology and is currently Associate Secretary of the Annual Meeting and Chair of the Special Projects Committee.
Dr. Pan's clinical practice is mainly based at Santa Clara Valley Medical Center, Stanford's affiliate county hospital, where she is chief of the retina service. -
Stephanie Jiaying Pan
Clinical Associate Professor, Anesthesiology, Perioperative and Pain Medicine
BioStephanie Pan, MD, is a Clinical Associate Professor at the Stanford University School of Medicine and a pediatric and regional anesthesiologist at the Lucile Packard Children’s Hospital. As the Associate Clinical Director for the pediatric anesthesiology division at Stanford, she is also a Local Mentor for the ASA Diagnostic POCUS Certificate Program, vice chair of POCUS for the SPA-SPPM UltRA POCUS SIG, and recipient of the ASRA Early-Stage Investigator Grant. Her clinical interests include perioperative methadone, pediatric regional anesthesia, pediatric POCUS, and pediatric orthopedic spine surgeries.
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Alan C. Pao
Associate Professor of Medicine (Nephrology) and, by courtesy, of Urology
Current Research and Scholarly InterestsWe are broadly interested in how the kidneys control salt, water, and electrolyte homeostasis in the body. Our disease focus is on kidney stone disease. We use cultured kidney cells, transgenic mice, human plasma/urine samples, and electronic health record data to study the pathogenesis of kidney stone disease. Our therapeutic focus is on the development of small molecule compounds that can be used for kidney stone prevention.
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David J. Park, MD, PhD, FCNS
Clinical Assistant Professor, Neurosurgery
Current Research and Scholarly InterestsThe goal of our Laboratory is to improve patients’ care and outcomes by analyzing clinical data from thousands of patients treated at our institution. Our current primary areas of interest are benign tumors, brain and spine metastases, and neurogenetic disorders.
Our lab is led by Dr. Steven D. Chang and Dr. David J. Park and proudly hosts talented young clinical scientists from around the world.
Link: https://med.stanford.edu/neurosurgery/research/NeuroOncLab.html -
Karen J. Parker, PhD
Truong-Tan Broadcom Endowed Professor and Professor, by courtesy, of Comparative Medicine
Current Research and Scholarly InterestsThe Parker Lab conducts research on the biology of social functioning in monkeys, typically developing humans, and patients with social difficulties.
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Julie Parsonnet
George DeForest Barnett Professor of Medicine, Emerita
Current Research and Scholarly InterestsI am an infectious diseases epidemiologist who has done large field studies in both the US and developing countries. We research the long-term consequences of chronic interactions between the human host and the microbial world. My lab has done fundamental work establishing the role of H. pylori in causing disease and understanding its epidemiology. Currently, our research dissects how and when children first encounter microbes and the long term effects of these exposures on health.
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Sonia Partap
Clinical Professor, Pediatric Neurology
Clinical Professor (By courtesy), NeurosurgeryCurrent Research and Scholarly InterestsMy research interests involve the epidemiology, treatment and diagnosis of pediatric and young adult brain tumors. I am also interested in long-term neurologic effects and designing clinical trials to treat brain and spinal cord tumors.
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Preethy Parthiban
Postdoctoral Scholar, Neonatal and Developmental Medicine
BioMy research centers on how the innate immune system shapes tissue remodeling in health and disease. During my PhD, I uncovered a key role for resident macrophages in driving cardiac fibrosis, identifying a macrophage-derived chemokine that directly activates cardiac fibroblasts. Building on this foundation, my postdoctoral work at Stanford focuses on neutrophil–macrophage crosstalk in disrupted alveolarization in neonatal mice and patients. By integrating cellular, molecular, and translational approaches, I aim to define how innate immune pathways orchestrate extracellular matrix remodeling. Ultimately, my goal is to identify critical therapeutic targets that improve outcomes in ECM-related diseases.
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Josef Parvizi, MD, PhD
Professor of Neurology and Neurological Sciences (Adult Neurology) and, by courtesy, of Neurosurgery
BioDr. Parvizi completed his medical internship at Mayo Clinic, neurology training at Harvard, and subspecialty training in clinical neurophysiology and epilepsy at UCLA before joining the Department of Neurology and Neurological Sciences at Stanford in 2007. Dr. Parvizi directs the Stanford Program for Medication Resistant Epilepsies and specializes in surgical treatments of intractable focal epilepsies. Dr. Parvizi is the principal investigator in the Laboratory of Behavioral and Cognitive Neuroscience, where he leads a team of investigators to study the human brain. http://med.stanford.edu/parvizi-lab.html.
Epilepsy patient story: https://www.youtube.com/watch?v=HXy-gXg0t94&t=3s -
Anca M. Pasca, MD
Assistant Professor of Pediatrics
On Partial Leave from 01/05/2026 To 04/19/2026Current Research and Scholarly InterestsThe research focus of the lab is to understand molecular mechanisms underlying neurodevelopmental disorders associated with premature birth, neonatal and fetal brain injury with the long-term goal of translating the lab’s findings into therapeutics. The research team employs a multidisciplinary approach involving genetics, molecular and developmental neurobiology, animal models and neural cells differentiated from patient-derived induced pluripotent stem (iPS) cells. In particular, the lab is using a powerful 3D human brain-region specific organoid system developed at Stanford (Nature Methods, 2015; Nature Protocols, 2018) to ask questions about brain injury during development.
https://www.neopascalab.org/ -
Sergiu P. Pasca
Kenneth T. Norris, Jr. Professor of Psychiatry and Behavioral Sciences and Bonnie Uytengsu and Family Director of the Stanford Brain Organogenesis Program
Current Research and Scholarly InterestsA critical challenge in understanding the intricate programs underlying development, assembly and dysfunction of the human brain is the lack of direct access to intact, functioning human brain tissue for detailed investigation by imaging, recording, and stimulation.
To address this, we are developing bottom-up approaches to generate and assemble, from multi-cellular components, human neural circuits in vitro and in vivo.
We introduced the use of instructive signals for deriving from human pluripotent stem cells self-organizing 3D cellular structures named brain region-specific spheroids/organoids. We demonstrated that these cultures, such as the ones resembling the cerebral cortex, can be reliably derived across many lines and experiments, contain synaptically connected neurons and non-reactive astrocytes, and can be used to gain mechanistic insights into genetic and environmental brain disorders. Moreover, when maintained as long-term cultures, they recapitulate an intrinsic program of maturation that progresses towards postnatal stages.
We also pioneered a modular system to integrate 3D brain region-specific organoids and study human neuronal migration and neural circuit formation in functional preparations that we named assembloids. We have actively applied these models in combination with studies in long-term ex vivo brain preparations to acquire a deeper understanding of human physiology, evolution and disease mechanisms.
We have carved a unique research program that combines rigorous in vivo and in vitro neuroscience, stem cell and molecular biology approaches to construct and deconstruct previously inaccessible stages of human brain development and function in health and disease.
We believe science is a community effort, and accordingly, we have been advancing the field by broadly and openly sharing our technologies with numerous laboratories around the world and organizing the primary research conference and the training courses in the area of cellular models of the human brain.
