Harland Steven Winter is an associate professor of Pediatrics at Harvard Medical School and Massachusetts General Hospital for Children. He earned his undergraduate degree in mathematics from the University of California, Berkeley, and obtained his M.D. from the University of California, Los Angeles, where he completed his pediatric residency. He finished a pediatric gastroenterology fellowship at Children’s Hospital Boston. He later joined the faculty at MGH and currently serves as the director of the inflammatory bowel disease program.

His scientific achievements include discovering a new disorder in 2012, specifically a mutation in the DGAT1 gene, primarily found in infants experiencing protein-losing enteropathy and diarrhea during their first week of life. Furthermore, Dr. Winter has completed many clinical trials focused on inflammatory bowel disease (IBD) to identify the most effective treatment options for children. He is currently investigating biomarkers that predict responses to medications for Crohn’s disease and ulcerative colitis, exploring the role of the microbiome in IBD, and examining the relationship between the microbiome and behavior in individuals with autism spectrum disorder.

• 1984: Textbook on Infant Nutrition
• 1998-2000: President, North American Society for Pediatric Gastroenterology, Hepatology, and Nutrition (NASPGHAN)
• 2000: Congress President, the First World Congress of Pediatric Gastroenterology, Hepatology and Nutrition, Boston, MA
• 2000: Started the Pediatric IBD Consortium
• 2006: Pediatric Gastrointestinal Endoscopy: Textbook and Atlas (second edition 2020)
• 2008: Started the first Advanced Pediatric IBD Fellowship at MGH
• 2016: Harvard Medical School Lifetime Achievement Award for Community Service for children with disabilities
• 2020: Joan Cutler Lifetime Achievement Award from the Crohn’s and Colitis Foundation

• 1982: First description of intraepithelial eosinophils in the esophagus
• 1984: Isolation and characterization of intestinal macrophages
• 1985: Characterization of colitis in cotton-top tamarins
• 1990: Gastrointestinal dysfunction in HIV/AIDS
• 1991: Transplantation of human fetal intestine into nude mice
• 2002: Gastrointestinal problems in children with autism
• 2004: NIH funding to study the microbiome in children with IBD
• 2012: Described DGAT1 deficiency: A new disease with protein-losing enteropathy
• 2015: Collagenous gastritis: Clinical description and pathophysiology
• 2020: Biomarkers that predict response to medications used to treat IBD
• 2024: The role of neurotransmitters in the intestine in individuals with autism