Medical or Graduate Education: Tehran University 。School of Medical Sciences, Iran， Residency: Guy's Hospital, England - Internal 。Medicine， Hillingdon Hospital, England - Gastroenterology。 Fellowship: Royal Postgraduate Medical School, England - Gastroenterology， University of Maryland Medical Center - Gastroenterology。 linical Expertise: Blood in stool； Capsule endoscopy； Colonoscopy； Crohn's disease； Esophagogastroduodenoscopy (EGD)； Fistula； Irritable bowel syndrome (IBS)； Leaky gut syndrome； Pouchitis； Ulcerative colitis。 Research Interests: Inflammatory bowel disease Oxygen free radicals in gastrointestinal disease Regulation of intestinal barrier function Gut microbiota in GI and systemic diseases Prebiotic and gastrointestinal diseases Effect of alcohol on intestine Mind-body stress in gastrointestinal diseases Sleep, circadian rhythm and gastrointestinal diseases。 publications ： Disease-specific alterations in the enteric virome in inflammatory bowel disease. Norman JM, Handley SA, Baldridge MT, Droit L, Liu CY, Keller BC, Kambal A, Monaco CL, Zhao G, Fleshner P, Stappenbeck TS, McGovern DP, Keshavarzian A, Mutlu EA, Sauk J, Gevers D, Xavier RJ, Wang D, Parkes M, Virgin HW Cell 2015 Jan 29 160(3):447-60. Intestinal Microbiota: a Regulator of Intestinal Inflammation and Cardiac Ischemia? Bashashati M, Habibi HR, Keshavarzian A, Schmulson M, Sharkey KA Curr Drug Targets 2015 Jan 19。 HIV-associated mucosal gene expression: region-specific alterations. Voigt RM, Keshavarzian A, Losurdo J, Swanson G, Siewe B, Forsyth CB, French AL, Demarais P, Engen P, Raeisi S, Mutlu E, Landay AL AIDS 2015 Jan 14。 Simultaneous gas-chromatographic urinary measurement of sugar probes to assess intestinal permeability: Use of time course analysis to optimize its use to assess regional gut permeability. Shaikh M, Rajan K, Forsyth CB, Voigt RM, Keshavarzian A Clin. Chim. Acta 2015 Jan 12 442C:24-32. Modulation of TIM-3 expression on NK and T cell subsets in HIV immunological non-responders. de Kivit S, Lempsink LJ, Plants J, Martinson J, Keshavarzian A, Landay AL Clin. Immunol. 2015 Jan 156(1):28-35.