Posts classified under: New Members

Julian A. Martinez, M.D., Ph.D., FACMG

Faculty Member

Associate Professor
Department of Human Genetics
David Geffen School of Medicine
University of California, Los Angeles


Personal Statement

Julian A. Martinez is a medical geneticist and developmental biologist who has served at the UCLA School of Medicine since he joined the Department of Human Genetics in 2007. Dr. Martinez earned his B.S. in Biology and Spanish Literature at Yale University and pursued his medical training at Yale School of Medicine. He went on to train as a Pediatrician at Mattel Children’s Hospital UCLA. Dr. Martinez was Chief Resident of the UCLA Intercampus Medical Genetics Program, where he trained as and currently serves as a board-certified Medical Geneticist. He was a postdoctoral fellow in the laboratory of Utpal Banerjee at UCLA, where he worked on genetic approaches to stem progenitor function in Drosophila. Dr. Martinez is a recipient of the Pediatrics Department Outstanding Research Award, as well as the David W. Smith Pediatric Trainee Research Award of the Western Society for Pediatric Research, among other honors. Dr. Martinez is a member of the Division of Medical Genetics, where he has maintained a clinical interest in genetic syndromes that lead to overgrowth, vascular malformations, and cancer predisposition. As an Associate Professor with tenure at the University of California Los Angeles, his laboratory research focuses on novel growth regulatory pathways in progenitor and stem cell maintenance and the study of human growth disorders with cancer predisposition. His approach utilizes model organisms and rare human genetic disorders to identify new genes and characterize signaling pathways regulating tissue growth, with a translational focus on identifying the genetic basis of rare genetic syndromes that predispose to cancer and neurodevelopmental phenotypes. His laboratory has described novel syndromes, extended the phenotypic findings for established ones, and identified their genetic basis. Using next generation sequencing technologies and modeling of human disease-associated genetic variants in Drosophila, cancer cell lines and human neural stem cells, he dissects the mechanistic basis for these genetic disorders. Dr Martinez is one of the Principal Investigators of the Undiagnosed Diseases Network site at UCLA, Co-Director of the California Center for Rare Diseases, Director of the T32 Medical Genetics Training Program, and Co-Director of the Pediatric Cancer Predisposition Program.

Ye Emily Wu, Ph.D.

Faculty Member

Assistant Professor
Department of Neurobiology
Department of Biological Chemistry
David Geffen School of Medicine
University of California, Los Angeles


Personal Statement

My long-term research interest is to take an integrated multidisciplinary approach to elucidate the molecular, circuit, and computational mechanisms underlying affiliative social behavior and how their disruptions contribute to social deficits in neurodevelopmental and neuropsychiatric disorders. My academic training has provided me with extensive research experience in genetics, bioinformatics, and molecular, cellular, behavioral, and computational neuroscience. During my Ph.D. research at Stanford University, I uncovered novel molecular and cellular mechanisms regulating axonal transport and synapse formation in neurons (Wu et al., Neuron 2013; Klassen*, Wu* et al., Neuron 2010. *Equal contributions). As a postdoctoral fellow at the University of California, Los Angeles, I investigated the neural mechanisms underlying autism using integrative genomic methods as well as in vitro and in vivo model systems. My work provided important insights into the role of microRNA dysregulation in autism (Wu et al., Nature Neuroscience 2016). I also applied single-cell RNA sequencing to characterize cell type diversity in a key social brain area, the amygdala, and developed methods to systematically map brain activity onto molecularly defined cell populations (Wu*, Pan* et al., Neuron. 2017). I further investigated the neural mechanisms underlying sex differences in parenting behavior across molecular, cellular, and neural circuit levels (Chen*, Hu*, Wu* et al., Cell 2019). More recently, by combining novel behavioral paradigms, functional manipulation, in vivo calcium imaging, and computational approaches, I have made important discoveries on the neural circuit mechanisms underlying affiliative, prosocial behavior (Wu*, Dang* et al., Nature 2021; Zhang*, Wu* et al., Nature 2024, Sun et al., Science 2025).

Imaad Nasir, M.D.

Associate Member

Assistant Clinical Professor
Department of Neurology
David Geffen School of Medicine
University of California, Los Angeles

 

 

 

Sahib Khalsa, M.D., Ph.D.

Associate Member

Associate Professor in Residence
Director of Anxiety Disorders Research

Department of Psychiatry & Biobehavioral Sciences
David Geffen School of Medicine
University of California, Los Angeles


Personal Statement

My research focuses on understanding the pathophysiological basis of interoception, the process by which the nervous system senses internal body signals that are used to regulate bodily homeostasis. In addition, I investigate neuroscience-informed clinical applications of interoceptive interventions for disorders affecting physical or mental health. My interdisciplinary expertise harnesses methods from pharmacology, cognitive neuroscience, functional neuroimaging, electroencephalography, computational psychiatry, and behavioral clinical trials and applies them to 1) develop better methods for assessing interoception, and 2) answer basic and clinical questions in individuals with psychiatric disorders, including anxiety and eating disorders, and individuals with medical conditions, including cardiac arrhythmias. My work aims to determine how a better understanding of the pathophysiological basis of interoceptive symptoms can be translated clinically via the systematic testing of novel experimental therapeutics for these conditions. To accomplish these aims, I have integrated numerous methods to interrogate cardiovascular, respiratory, and gastrointestinal interoception across psychiatric and medical conditions, including the combination of pharmacological probes with functional magnetic resonance imaging (pharmaco-fMRI), combination of mechanosensory probes with electroencephalography (EEG) and computational modeling, and evaluation of non-pharmacologic interventions for anxiolysis (floatation-REST; Reduced Environmental Stimulation Therapy aka ‘float therapy’). My research projects have been NIH funded at the principal investigator level at every stage of my career (F31, R01 supplement, K23, R34, R01, and P20 subproject), as well as by private foundation and industry grants. Over the past 9 years I served as Director of Clinical Operations at the Laureate Institute for Brain Research (LIBR), supervising numerous NIH and industry-sponsored clinical trials, ensuring the safety of participants and successful completion of project-specific data collection.