Stephen J. Meltzer

Stephen J. Meltzer, MD is the Loeb Professor of Gastroenterology and Professor of Oncology and Medicine at the Johns Hopkins University School of Medicine, where he co-directs gastrointestinal cancer research. He is one of the world's preeminent molecular biologists studying the progression from Barrett's esophagus (BE) to esophageal adenocarcinoma (EAC)—a field he has shaped over three decades through foundational discoveries in epigenetic alterations, microRNA regulation, and DNA methylation biomarkers that drive neoplastic transformation. Meltzer's laboratory was among the first to characterize genome-wide methylation abnormalities in BE and EAC, identifying candidate epigenetic biomarkers for early detection that have entered clinical evaluation. He contributed groundbreaking work identifying p16 (CDKN2A) hypermethylation as an early molecular event in BE-to-EAC progression, and his translational research pipeline has produced multiple DNA methylation and microRNA-based biomarker assays for risk stratification of patients with Barrett's esophagus under endoscopic surveillance. Beyond epigenetics, Meltzer has contributed to the molecular characterization of EAC genomics, studied the mechanisms of photodynamic therapy and endoscopic ablative techniques for early esophageal neoplasia, and developed predictive models for progression from non-dysplastic Barrett's to high-grade dysplasia and invasive cancer. He has been continuously funded by the National Institutes of Health for over 25 years and has authored over 300 peer-reviewed publications. His work provides the molecular foundation for endoscopic surveillance protocols and early intervention strategies in Barrett's esophagus.