Vsevolod Y. Polotsky, M.D., Ph.D.


Dr. Polotsky is a world-renowned expert in animal models of obstructive sleep apnea, and metabolic complications of sleep apnea.  His laboratory developed a mouse model of intermittent hypoxia mimicking the oxyhemoglobin profile in human OSA. 

His work has revealed mechanisms by which sleep apnea contributes to glucose dysregulation, liver injury, and atherosclerosis. Currently, he is exploring novel chemogenetic techniques to manipulate upper airway patency.   Dr. Polotsky is Director of Sleep Research T32 Fellowship Training Program and has mentored fellows from around the world.

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Alan R. Schwartz, M.D.


Dr. Schwartz is recognized for seminal work on upper airway physiology during sleep.  His laboratory has developed physiologic tools for assessing the severity of upper airway obstruction during sleep and novel treatment strategies for obstructive sleep apnea.  He has pioneered novel therapeutic strategies for sleep apnea with electrical stimulation of the hypoglossal and phrenic nerves as well as with high flow tracheal and nasal insufflation.  He is Director of the clinical Sleep Laboratory and the Center for Interdisciplinary Sleep Research and Education (CISRE).

Jonathan C. Jun, M.D.

Assistant Professor

Dr. Jun has been on faculty since 2011 and has focused on the impacts of hypoxia and sleep apnea on lipid and glucose metabolism, oxidative stress, and atherosclerosis.   He demonstrated significant effects of intermittent and sustained hypoxia on atherosclerosis, oxidative stress, lipid metabolism, glucose metabolism, and thermoregulation.  He has also examined metabolic effects of Hypoxia-Inducible Factors (HIFs) on metabolism in vivo and in vitro.  He is lead PI on clinical studies of CPAP withdrawal to examine metabolic effects of sleep apnea, using stable isotopes to measure substrate flux. 

Luu V. Pham, M.D.

Assistant Professor

Dr. Pham joined the Sleep Research group as a Fellow in Sleep Medicine in 2013 and joined the faculty in 2016. He is studying the role of hypoxemia and ventilatory control in the pathogenesis of metabolic disturbances. To address this topic, he has studied nocturnal respiratory patterns from participants of the CRONICAS study, an epidemiological study conducted at high and low altitude sites in Peru.



5501 Hopkins Bayview Circle
Room 4B.72
Baltimore, 21224

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