The OFAS Team
David Orentreich, MD
David Orentreich received his MD degree from Columbia College of Physicians and Surgeons in 1980. He became a diplomat of the National Board of Medical Examiners in 1981 and American Board of Dermatology in 1984. He joined the Orentreich Medical Group, LLP (OMG, LLP) as a Partner in1984. In 1987, he was appointed Assistant Clinical Professor in the Department of Dermatology of the Ichan School of Medicine at Mount Sinai and Assistant Attending at the Mount Sinai-New York University Hospitals Health System. Concurrently, he joined Dr. Norman Orentreich as Consultant and Guiding Dermatologist for Clinique Laboratories, LLC. In clinical practice, he helped develop and create procedural innovations and maintenance treatments that were recognized both nationally and internationally. He continues to treat skin disorders with a vast array of modern technologies and medicines, including the latest lasers, fillers, neurotoxins, and skin care products.
Having always been interested in research, he authored and co-authored a multitude of medical journal and book chapter publications within the fields of general dermatology, injectable fillers, scar revision, hair, and biomedical research. After becoming Co-Director of the Orentreich Foundation for the Advancement of Science (OFAS, Inc.) in 2007, he began focusing his interest in the area of dietary sulfur amino acid restriction. As Director, he is closely involved in the activities of OFAS and regularly attends meetings with scientific staff to oversee research.
Bernardita Calinao, PhD
Deputy DirectorDr. Calinao holds a doctoral degree in Environmental Planning from the State University of New York College of Environmental Science and Forestry. She has over a decade of experience as the executive head of operations responsible for day-to-day leadership and management of financial, legal, research, safety, and regulatory concerns; overseeing external relations; strategic planning; and contract negotiation. Dr. Calinao also has more than fifteen years of environmental planning experience in the US and abroad, and has successfully directed more than 25 multidisciplinary environmental studies for engineering projects in the transportation and energy sectors.
Gene P. Ables, PhD
Associate Science DirectorDr. Ables received his degree of Doctor of Veterinary Medicine from the University of the Philippines. He then obtained his PhD from Hokkaido University (Japan). His post-doctoral research in Preventive Medicine and Nutrition at Columbia University focused on liver lipid metabolism. In 2006, he was appointed Associate Research Scientist at the Columbia University Medical Center. Dr. Ables joined OFAS in April 2011 as a Senior Scientist. Recently appointed Associate Science Director, he leads staff in investigations of the methionine-restricted diet’s effects on metabolism, cancer, and epigenetics.
Jay E. Johnson, PhD
Senior ScientistDr. Johnson received his doctorate in Molecular Biology from Case Western Reserve University (Cleveland, OH). His post-doctoral work at Fox Chase Cancer Center (Philadelphia, PA) used a liposarcoma model system to investigate the maintenance of telomeres, important nucleoprotein structures with roles in aging and cancer. Dr. Johnson then joined the University of Pennsylvania (Philadelphia), where his early work explored cellular defects in patients with Werner and Bloom’s syndromes, genetic diseases characterized by accelerated aging and cancer predisposition. Dr. Johnson’s recent work has focused on exploring the mechanistic basis of the benefits of methionine restriction in S. cerevisiae and cultured mouse and human cells.
Sailendra N. Nichenametla, PhD
Senior ScientistDr. Nichenametla received his PhD in Integrative Biosciences from Pennsylvania State University (Hershey, PA) under OFAS consultant Dr. John Richie. He studies how genetics and the environment—diet, in particular—shape health. During graduate and postgraduate training, he investigated how bioactive compounds in milk, berries, and dietary fiber can affect diseases such as colon cancer and metabolic syndrome. While training for his PhD, he investigated how genetic variation in humans alters an individual’s capacity to combat oxidative stress and risk for cancers. He is currently studying biochemical and molecular mechanisms that lead to lifespan extension and other benefits induced by methionine restriction.
Arthur J.L. Cooper, PhD Professor of Biochemistry and Molecular Biology, New York Medical College PhD, Weill Medical College of Cornell University Research interests include amino acid, sulfur, and energy metabolism; vitamin B6-containing enzymes; bioactivation (toxification) mechanisms; transglutaminases (protein cross linking enzymes); and neurodegenerative diseases.
Mark C. Horowitz, PhD Professor of Orthopaedics and Rehabilitation; Vice Chair for Research Education & Training, Yale University School of Medicine PhD, SUNY Upstate Medical Center Research interests include osteoimmunology; osteoblasts; osteoclasts; adipocytes; bone remodeling; mesenchymal stem cell differentiation; B cell transcription factors and bone
Sulli J. Popilskis, DVM Asst Professor of Clinical Anesthesiology and Physiology, New York Medical College DVM, Lithuanian Veterinary Academy
John P. Richie, PhD Professor of Public Health Sciences & Pharmacology, Penn State University College of Medicine PhD, University of Louisville Research interests include cancer risk in individuals and in populations; aging, nutrition, tobacco, and race/ethnicity as regulators or determinants of cancer risk.
Jay A. Zimmerman, PhD Adjunct Professor, St. John’s University PhD, Rutgers University Research interests include experimental gerontology; nutritional aspects of lifespan extension.