SWAGÊÓƵ

Ph.D. Physiology and Nutrition, University of Leeds, England, UK., 1994
M.S. with distinction, Physiology and Nutrition, University of Leeds, England, UK., 1992
B.S. Honors, Animal Science, University of Iasi, Romania

Postdoctoral Fellow, Neuroscience, College of Veterinary Medicine, Washington State University, Pullman, WA, 1996-1998

Associate Professor of Physiology, Western University of Health Sciences, Biomedical Sciences 2010-present

Associate Professor of Nutritional Neuroscience and Physiology, Department of Nutritional Sciences, The Pennsylvania State University, University Park, PA 2008-2009

Assistant Professor of Nutritional Neuroscience and Physiology, Department of Nutritional Sciences, The Pennsylvania State University, University Park, PA 2002-2008

Research Assistant Professor, College of Veterinary Medicine, Washington State University, Pullman, WA, 1998-2002

Invited Lecturer, University Pierre et Marie Curie, Paris, France, AgroParisTech, Paris, France, University of Suceava, Romania

Undergraduate:

• Introductory Principles in Nutrition
• Nutritional Aspects of Diseases
• Neurobiology
• First year seminar

Graduate:

• Ingestive Behavior: factors controlling food intake and energy homeostasis
• Physiology and Nutritional Neuroscience
• Nutrient metabolism
• Gastrointestinal Physiology
• Endocrinology
• Neuroscience

Obesity and diabetes are major causes of morbidity and mortality worldwide Using a combination of molecular, neuroanatomical, behavioral, biochemical and physiological approaches we are investigating satiation signals that control eating and regulation of body weight. Consequently, we are interested in the reduction of sensitivity to satiation signals in response to dietary adaptation (particularly dietary fat) and subsequent development of hyperphagia and obesity. We have developed several research programs in the following areas: 1) the interaction between metabolic events, orosensory factors, and central functions relevant to the initiation and termination of eating and the development of long term feeding patterns; 2) the neural regulation of eating during obesity and development of type-2 diabetes; 3) the central and peripheral taste and motivational processes in obesity and diabetes; 4) the effects of chronic exposure to dietary fats on neural adaptation, subsequent overconsumption and weight gain; 5) the role of gut microbiota in intestinal chemosensation. The control of eating and regulation of body weight require integration of sensory neural processes originating in the oral cavity and viscera and those systems that assign actual hedonic value to a meal. In obesity, this intricate relationship is perturbed. Using rodent models of obesity and diabetes, my laboratory demonstrated that, similar to obese humans, obese rats have an increased avidity for palatable foods (sucrose and oils) that progresses during prediabetes and diabetes. We also showed, that animal prone to become obese exhibit a host of postoral behavioral and neural deficits and fail to integrate postabsorptive and orosensory effects of palatable tastants.

Selected Publications

• Leung, R., Covasa, M. Do gut microbes taste? Nutrients 13 (8): 2581, 2021
• Iatcu, C.O., Steen, A., Covasa, M. Gut microbiota and complications of Type-2 diabetes. Nutrients 14(1):2729, 2021.
• Lobiuc A., Sterbuleac, D., Sturdza O., Dimian, M., Covasa M. (2021) A Conservative Replacement in the Transmembrane Domain of SARS-CoV-2 ORF7a as a Putative Risk Factor in COVID-19. Biology 10(12):1276.
• Napolitano M, Covasa M. Microbiota Transplant in the Treatment of Obesity and Diabetes: Current and Future Perspectives. Front Microbiol. 11: 590370, 2020.
• Orellana ER, Covasa M, Hajnal A. Neuro-Hormonal Mechanisms Underlying Changes in Reward Related Behaviors Following Weight Loss Surgery: Potential Pharmacological Targets. Biochem Pharmacol. 2019.
• Mazloom, K., Siddiqi, I., Covasa, M. Probiotics: How effective are they in the fight against obesity. Nutrients 11(2):258, 2019.
• Stephens, R.W., Arhire L., Covasa, M. Gut Microbiota: From microorganisms to metabolic organ influencing obesity. Obesity 26: 801-809, 2018.
• Duca FA, Katebzadeh S, Covasa M. (2015) Impaired GLP-1 signaling contributes to reduced sensitivity to duodenal nutrients in obesity-prone rats during high-fat feeding. Obesity (Silver Springs). 2015 Nov;23(11):2260-8.
• Duca, F. Gérard, P. Covasa, M. Lepage, P. The metabolic interplay between gut bacteria and their host. Frontiers of Hormone Research. S. Karger Publishers, Basel, Switzerland, 2014.
• Zhong L, Zhang X, Covasa M. Emerging roles of lactic acid bacteria in protection against colorectal cancer. World J Gastroenterol. 20: 7878-7886, 2014.
• Duca FA, Swartz TD, Covasa M. Effect of diet on preference and intake of sucrose in obese prone and resistant rats. PLoS One. 9(10):e111232, 2014.
• Duca, FA., Zhong, L., Covasa, M. Reduced CCK signaling in obese-prone rats fed a high fat diet. Horm Behav. 2013 Nov;64(5):812-7.
• Duca, FA, Sakar, Y., Covasa, M. The modulatory role of high fat feeding on gastrointestinal signals in obesity. Journal of Nutritional Biochemistry, 2013.
• Swartz, TD., Sakar, Y., Duca, FA., Covasa, M. Preserved adiposity in the Fisher 344 rat devoid of gut microbiota. FASEB, 27(4): 1701-1710, 2013.
• Duca, F., Sakar, Y., Covasa, M. Combination of obesity and high-fat feeding diminishes sensitivity to GLP-1R agonist, Exendin-4. Diabetes 62(7): 2410-2415, 2013.
• Duca, F., Swartz, TD., Sakar, Y., Covasa, M. Increased oral detection, but decreased intestinal signaling for fats in mice lacking gut microbiota. PLoS ONE 7(6):e39748, 2012.
• Duca, F., Swartz, TD., Sakar, Y., Covasa, M. Decreased intestinal nutrient response in diet-induced obese rats: role of gut peptides and nutrient receptors.International Journal of Obesity 37: 375-381, 2012.
• Swartz, TD., Duca, F., de Wouters, T., Sakar, Y., Covasa, M. Upregulation of intestinal T1R3 and SGLT-1 expression and increased sucrose intake in mice lacking gut microbiota. Br J Nutr 107:621-630, 2012.
• Duca FA., Covasa M. Current and emerging concepts on the role of peripheral signals in the control of food intake and development of obesity. Br J Nutr. 2012 Sep;108(5):778-93.