Clinical Sciences
Clinical Sciences by CenExel offers a unique opportunity for collaboration with pharmaceutical sponsors, CROs, and vendors, to support study development and conduct within the Sponsor’s clinical development program across the development lifecycle. These activities include Clinical Sciences support from pre-IND, Phase I, and translational medicine studies through to Phase III pivotal studies, peri-approval, and Phase IV studies. Clinical Sciences can provide scientific consulting for clinical development planning, study design, recruitment solutions, dose selection criteria to support more confident go/no-go decisions through the application of fit-for-purpose biomarkers, measures, and endpoints.
Clinical Sciences Leadership
Larry Ereshefsky, PharmD, BCPP
Chief Scientific Officer, Early Phase
Dr. Ereshefsky joined Hassman Research Institute as CSO, Early Phase Development in early 2017. One year later he accepted the same role with Collaborative Neuroscience Research, enhancing the partnership between the two companies with his wide-ranging expertise. He facilitated the strategic merger in 2019 to expand on the partnership’s leadership in the field, culminating years of collaboration in the formation of Apex. Dr. Ereshefsky has been instrumental in harmonizing the scientific, technological, and clinical processes across organizations, enabling the seamless execution of trials with the enrollment benefits of bi-coastal operations.
Dr. Ereshefsky is an internationally recognized thought leader in clinical translational central nervous system research with a proven track record in designing and performing Phase I/IIa studies. He is a leader in the application of translational drug development tools, and in the use of signal detection strategies to minimize placebo response. He is utilized as a global resource within Apex, providing support to ensure consistency and high quality across sites, and spearheading ongoing activities to increase capabilities. Dr. Ereshefsky is actively involved in strategic planning for compound development. He helps design translational research programs and define the critical path towards regulatory approval. He has extensive experience working with regulatory agencies and developing strategic plans to address compound differentiation and reimbursement challenges.
Robert E. Litman, MD
Chief Scientific Officer, Psychiatry
Dr. Litman is the Medical Director and Principal Investigator for all clinical trials at CenExel CBH. He developed his interest in the treatment of schizophrenia at Massachusetts General Hospital, where he completed his residency in psychiatry. Shortly thereafter, he joined the Experimental Therapeutics Branch, National Institute of Mental Health, NIH, as a Senior Staff Fellow. He remained at NIH until 1995, where he continued to pursue his interest in schizophrenia, including investigating the effects of atypical neuroleptics biological and genetic markers in schizophrenia, as well as the development of better combination therapies for schizophrenia using the alpha-2 antagonist idazoxan. After leaving the NIH, he formed his own clinical trials research organization, first in conjunction with area hospitals, and then as a free-standing inpatient and outpatient clinical research organization now known as CBH Health. Since then, he has conducted over 300 Phase I-IV clinical trials and has participated in many of the important advances in pharmacotherapy of schizophrenia and other brain disorders.
Dr. Litman has an extensive background in psychopharmacology, the evaluation and treatment of schizophrenia, bipolar, major depression, anxiety, and Alzheimer disease. He serves as a consultant in psychopharmacology to many area hospitals and group practices, has over 30 academic publications, and frequently speaks about new advances in the field of psychopharmacology, and on the current issues regarding drug development for psychiatric illness. He is currently an Associate Professor of Psychiatry at Georgetown University Medical School (where he teaches and trains Psychiatry residents) and a Fellow and Diplomate of the American Board of Psychiatry and Neurology and Diplomate, Added Qualifications in Geriatric Psychiatry.
Brett A English, PharmD, PhD
Vice President
An accomplished clinical researcher, basic scientist, and psychiatric pharmacist, Dr. English joined Apex in 2021 to provide strategic direction and leadership to the Scientific Affairs team, medical/scientific guidance and training to clinical project teams, and consultation and support services to pharmaceutical companies. Specialized in translational neurosciences, he has deep expertise in early phase program planning and electrophysiology, imaging, and pharmacodynamic biomarker applications.
Dr. English brought with him to Apex over 15 years of experience as a clinical scientist and Principal Investigator on investigator-initiated and industry-sponsored Phase I-III trials in CNS disorders. He also has experience serving as a Product Team Lead and Clinical Development Lead for numerous compounds in early phase development in the CNS therapeutic area. In addition to his clinical research experience, Dr. English has experience in basic biomedical research, including preclinical models of neuropsychiatric disorders utilizing several in-vitro and in-vivo behavioral and physiological experimental paradigms. He has also utilized novel high-throughput pharmacogenetic screening methods to discover novel variants in neuro-transporter proteins and their association with psychiatric disorders.
Brandy Isaacks
Vice President, Project Management & Scientific Affairs
Brandy has a lengthy and admirable career history of more than 20 years in clinical research project management and operations. Most recently, she was serving as the lead for all Psychiatry in the Neuroscience Division at Syneos Health. Her background also highlights working with small to mid-size pharma and biotech clients, providing strategic guidance for clinical development planning, holistic team management, and ongoing client and program support. Brandy’s training and career began with conducting structured clinical interviews, clinical ratings, and electrophysiological (ERP) assessments at clinical research sites. Her work developing and sustaining client relationships has led her project teams to positive completion of numerous Phase I – IV clinical trials, resulting in approved products for psychiatry and neurology indications.
By focusing on early engagement, clinical team support, data quality, and project delivery, Brandy has found success in her CRO and client collaborations. She was recognized by the Healthcare Businesswomen’s Association (HBA) as a Luminary for being a role model for women in the healthcare industry and for mentoring and building industry leaders.
Internal Scientific Experts
Todd Bertoch, MD
Chief Medical Officer, CenExel JBR
Dr. Todd Bertoch is board-certified in Anesthesiology by the American Board of Anesthesiology. He received a Bachelor of Science Degree in Biochemistry from California State University at Fullerton and a Doctor of Medicine degree from the Uniformed Services University of the Health Sciences in Bethesda, Maryland. After an internship in Internal Medicine, he completed his Anesthesiology residency at Wilford Hall Medical Center in San Antonio, Texas, where he was Chief Resident and received the Arthur B. Tarrow Outstanding Resident Award. He is a member of the esteemed Alpha Omega Alpha Honor Medical Society.
Dr. Bertoch served as an anesthesiologist in the United States Air Force until 2006. Following the terrorist attacks of September 11, 2001, Dr. Bertoch was deployed to Mindanao in the southern Philippines and later to Balad Air Base in Iraq in support of Operation Enduring Freedom. He is a recipient of the Air Force Achievement Medal, the Air Force Commendation Medal, and the Meritorious Service Medal.
After completing his military service, Dr. Bertoch served for 11 years as the managing partner of Prescott Anesthesia in Prescott, Arizona where his practice included a focus on chronic pain management and addiction medicine. He joined CenExel JBR as Chief Scientific Officer in 2017.
Rajeev Kumar, MD
Chief Medical Officer, CenExel RMCR
Dr. Kumar is one of the world’s foremost experts on movement disorders, with unparalleled experience and expertise treating and researching Parkinson’s disease, Huntington’s disease, Dystonia, and many other debilitating movement disorders. Trained at the renowned Mayo Clinic, Dr. Kumar has over two decades of experience working in the fields of Neurology and Movement Disorders, and as Medical Director of Rocky Mountain Movement Disorders Center and director of the Huntington’s Disease Center of Excellence both here and at the former Colorado Neurological Institute, he has solidified his status as one of the most trusted and respected professionals in the field.
Dr. Kumar has been dedicated to the care of patients with movement disorders in Colorado since 1998. He has been designated a Dystonia Doctor of Excellence by the Dystonia Medical Research Foundation. Dr. Kumar and his team serve individuals with movement disorders from early adulthood through advanced age. Our center is dedicated to helping patients with serious neurologic conditions achieve their life goals.
Robert A. Riesenberg, MD
Medical Director, CenExel ACMR
Dr. Riesenberg is the founder and principal investigator for CenExel ACMR. A research psychiatrist with four decades of experience, Dr. Riesenberg’s primary focus is on CNS, PK, healthy normal, and child/adolescent disorders. Dr. Riesenberg has been the principal investigator in over 600 studies.
Dr. Riesenberg earned a bachelor’s degree in both Zoology and Psychology from Memphis State University in 1972. In 1975, he earned his MD from the University of Tennessee. He is licensed to practice in Georgia.
Sanjiv K. Sharma, MD, CPI
Chief Medical Officer, CenExel AMRI
Dr. Sharma has been involved in memory research since 2009. In 2013, he started AMRI as the principal investigator. Since then he has worked on over 35 memory related protocols. Dr. Sharma has his board certification in internal medicine as well as geriatric medicine. He is passionate about caring for patients and families who are worried about memory loss.
Dr. Sharma graduated from Mahatma Gandhi Medical Memorial College in Jamshedpur, India and completed his residency in internal medicine at Jersey Shore University Medical Center. In 2000, Dr. Sharma opened his private practice, Geriatric Medical Center, in Toms River, New Jersey.
Scientific Advisory Board
Mark S Cohen, PhD
Director
Dr. Cohen is the Technical Director of the Staglin Center for Cognitive Neuroscience at the UCLA School of Medicine. He is also the Director of the UCLA/Semel Neuroimaging Training Program, and he holds appointments in the UCLA Departments of Psychiatry & Biobehavioral Sciences, Neurology, Radiology, Biomedical Physics, Psychology, and Bioengineering. His research has been centered on the development of technological solutions to address difficult questions in neuroscience, particularly in Cognitive Neuroscience, and how the brain creates the mind. An early pioneer of functional brain imaging using magnetic resonance imaging, he has made meaningful contributions to many areas of neuroscience research including functional imaging, both imaging and EEG technology, cognitive science, and methods of analysis. Dr. Cohen worked in the private sector from 1985 to 1990 developing applications and technology of magnetic resonance imaging, before accepting a faculty appointment at Harvard, where he directed the high-speed MR imaging laboratory. He arrived at UCLA in 1993.
Dr. Cohen has published more than 200 peer-reviewed articles and papers, and holds patents in imaging and electrophysiology. He serves as a consultant and advisor to technology vendors in the neuroimaging space. He received his undergraduate training in both engineering at MIT and biology at Stanford. His Ph.D. is from the Rockefeller University.
Judith Jaeger, PhD
Principal Scientist, CognitionMetrics
President and Principal Scientist at CognitionMetrics LLC; Professor, Psychiatry and Behavioral Sciences, Albert Einstein College of Medicine, and Honorary Professor, Institute of Brain, Behaviour & Mental Health, University of Manchester.
20+ years experience as a clinican, teacher and academic researcher in psychiatry focused on cognitive dysfunction and its impact on disability. Internationally recognized clinical neuropsychologist and pharmaceutical executive. Previously Vice President for Clinical Trials at Cogstate, Inc, and Director Clinical Development at AstraZeneca Pharmaceuticals, Inc. Clinical and pharmaceutical development expert on cognitive, psychiatric and neurological disorders. Sought after key opinion leader and scientific consultant to most (14 of top 25) major pharma companies and several CRO’s and biotechs working in neuroscience. Over 65 peer-reviewed journal articles, one edited book, seven book chapters and one published neuropsychological test; 200+ published abstracts, conference presentations and invited lectures.
Bruce H Morimoto, PhD
Drug Development Consultant
Dr. Morimoto is a drug development consultant currently helping several biotech companies move their programs through clinical development and drug registration. He is also VP of Drug Development for Cerecin, a biopharmaceutical company focused on brain therapeutics. He has nearly 25 years of experience leading project teams in the development of innovative medicines, having previously held leadership roles at Alkahest, Celerion, Allon Therapeutics, MDS Pharma Services, and NeuroMed Technologies. Dr. Morimoto uses his extensive knowledge of translational medicine, CNS indications, and early-stage clinical research to provide guidance in the design and execution of nonclinical, clinical, and regulatory strategies. He also serves as a scientific advisor to the Michael J. Fox Foundation, chairing one of their scientific review panels.
Dr. Morimoto has published dozens of peer-reviewed papers on topics such as Alzheimer’s and other neurodegenerative diseases. He started his career on the faculty in the Chemistry Department at Purdue University where his independent research focused on neuronal signal transduction. He earned his doctorate in biochemistry from UCLA and completed a postdoctoral fellowship in molecular and cell biology at UC Berkeley.
Reid Robison, MD
Chief Medical Officer, Novamind
Dr. Robison is the Chief Medical Officer of Novamind, a mental health company enabling safe access to psychedelic medicine through a network of clinics, retreats, and clinical research sites. He is a founding board member at Psychedelic Institute, a non-profit dedicated to compassionate access to psychedelic therapies. He is the Medical Director at Center for Change, one of the top eating disorder treatment centers worldwide. He serves as Coordinating Investigator of the Multidisciplinary Association for Psychedelic Studies (MAPS) MDMA-assisted psychotherapy study of eating disorders, supervising the training and clinical research of all the MDMA therapy sites. He is also an adjunct professor at both the University of Utah and BYU.
After residency and fellowship training, Dr. Robison joined the tenure-track faculty at the University of Utah where he conducted trials of neuropsychiatric medicines and co-directed a genetics lab. After leaving full-time academia, he founded a Phase I-IV CNS clinical trials site and served as its PI for five years until he sold the company. Dr. Robison has extensive experience with ketamine in both research and clinic settings; he conducted his first research study with ketamine in 2011. A board-certified psychiatrist, he completed undergraduate studies in neuroscience at BYU then went to the University of Utah where he earned both his medical and MBA degrees.
Harry Tracy, PhD
Founder and President, NI Research
Dr. Tracy is the founder and President of NI Research (NIR), the leading publisher of independent research on the neurotherapeutics industry. NIR’s bimonthly publication, NeuroPerspective, has provided comprehensive and frank overviews of the neurotherapeutics sector since 1995. It is utilized by pharmaceutical companies and venture capital professionals around the world. NIR also publishes NeuroLicensing, the annual evaluation of the ever-changing licensing environment for CNS companies and their programs. NIR provides consulting services to pharmaceutical companies of all sizes and to venture capital/private equity groups assessing CNS investment opportunities.
Dr. Tracy’s background includes 25 years of experience as a clinician and consultant in a variety of psychiatric and neurological settings. He received his Ph.D. from the University of Miami, and completed his clinical training at Massachusetts General Hospital/Harvard Medical School. He has been a Research Associate in the Department of Neurology at UC Davis.
Mark Varney, PhD
Chief Scientific Officer, PsychoGenics
Dr. Varney is the Chief Scientific Officer of PsychoGenics, a preclinical CRO with expertise in CNS and orphan disorders. He leads the company’s drug discovery and development efforts. He has more than 30 years of experience in drug discovery, clinical development, and executive leadership positions in the biotech and pharmaceutical industry. Dr. Varney co-founded Neurolixis, a company focused on the discovery and development of novel drugs for the treatment of CNS diseases, and served as CEO for eight years. Before founding Neurolixis, he was CEO for Cortex Pharmaceuticals (now RespireRx Pharmaceuticals). Earlier on, he held senior level R&D positions with Sepracor (now Sunovion), Bionomics, and Merck.
Dr. Varney’s career has focused on drug discovery and clinical programs for treating schizophrenia, depression, cognitive disorders, anxiety, pain, epilepsy and insomnia. He has been successful in developing drug candidates in several of these disease areas and has published over 75 peer-reviewed scientific papers and filed numerous patent applications relating to new chemical entities and methods of use. He received his Ph.D. and post-doctoral training in Pharmacology from Oxford University, UK.