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Gastroenterology Labs

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  • Gerard E. Mullin Lab

    The Gerard E. Mullin Lab studies nutrition and the way that diet affects weight loss. In particular, we study how having an imbalanced gut microbiome may prevent weight loss in certain people.

    Research Areas: gut bacteria, nutrition, obesity, weight loss

    Lab Website

    Principal Investigator

    Gerard Mullin, M.D., M.S.

    Department

    Medicine

  • GI Biomarkers Laboratory

    The GI Biomarkers Laboratory studies gastrointestinal cancer and pre-cancer biogenesis and biomarkers. The lab is led by Dr. Stephen Meltzer, who is known for his research in the molecular pathobiology of gastrointestinal malignancy and premalignancy. Research in the lab has led to several groundbreaking genomic, epigenomic and bioinformatic studies of esophageal and colonic neoplasms, shifting the gastrointestinal research paradaigm toward genome-wide approaches.

    Research Areas: gastrointestinal system, biomarkers, cancer, epigenetics, genomics, bioinformatics, biogenesis

    Lab Website

    Principal Investigator

    Stephen Meltzer, M.D.

    Department

    Medicine

  • IBD and Autoimmune Liver Diseases Laboratory

    Investigators in the IBD and Autoimmune Liver Diseases Laboratory conduct basic and translational research in inflammatory bowel disease (IBD) and autoimmune liver diseases. One area of focus is discovering and developing biomarkers for diagnosing and prognosticating IBD and other autoimmune liver diseases (AILDs). We also are exploring the molecular pathogenesis of—and developing novel therapies for—IBD. In addition, we are working to understand the molecular reason why many IBD patients fail to respond to mainstay drug therapies—and to develop diagnostic assays that can predict non-responders before starting them on those therapies. These biomarker studies have led to our application for four U.S. and international patents.

    Research Areas: inflammatory bowel disease, Crohn’s disease, gastrointestinal system, colitis, autoimmune diseases, pathogenesis, celiac disease, liver diseases

    Lab Website

    Principal Investigator

    Xu Li, Ph.D.

    Department

    Medicine

  • Irritable Bowel Disease Genetic Research Laboratory

    Research in the Irritable Bowel Disease Genetic Research Laboratory focuses on the genetic variation in etiopathogenesis, disease manifestations and disease course in inflammatory bowel disease (IBD), Crohn’s disease and ulcerative colitis. We focus on familial IBD as well as IBD in the African-American and Ashkenazi Jewish populations. Our lab uses gene and genome-wide association mapping studies and whole genome sequencing to identify and characterize susceptibility genes for IBD in those populations. Additional studies examine how infectious diseases can possibly trigger Crohn’s disease and investigate the role of vitamin D and genetic modifiers of vitamin D in causing Crohn’s disease.

    Research Areas: inflammatory bowel disease, Crohn’s disease, colitis, vitamin D, genomics

    Lab Website

    Principal Investigator

    Steven Brant

    Department

    Medicine

  • James Hamilton Lab

    The main research interests of the James Hamilton Lab are the molecular pathogenesis of hepatocellular carcinoma and the development of molecular markers to help diagnose and manage cancer of the liver. In addition, we are investigating biomarkers for early diagnosis, prognosis and response to various treatment modalities. Results of this study will provide a molecular classification of HCC and allow us to identify targets for chemoprevention and treatment. Specifically, we extract genomic DNA and total RNA from liver tissues and use this genetic material for methylation-specific PCR (MSP), cDNA microarray, microRNA microarray and genomic DNA methylation array experiments.

    Research Areas: cancer, molecular genetics, genomics, pathogenesis, liver diseases, hepatocellular carcinoma

    Principal Investigator

    James Hamilton, M.D.

    Department

    Medicine

  • James Potter Lab

    The James Potter Lab studies the effect of ethanol and its metabolites on the a2(I) and a1(I) collagen promoters; the role of leptin on fibrogenesis; the role of Kupffer cells, cytokines, retinoic acid and leptin in stellate cell tansdifferentiation and collagen production; hormonal regulation of rat class I alcohol dehydrogenase; and transcriptional regulation of rat class I alcohol dehydrogenase promotor.

    Research Areas: collagen, gastroenterology, cytokines, ethanol, fibrogenesis

    Principal Investigator

    James Potter

    Department

    Medicine

  • Joanna Peloquin Lab

    The Joanna Peloquin Lab focuses on inflammatory bowel disease (IBD). We're working on individualized care for IBD patients through functional genomic studies, specifically those related to diet, host and microbiota interactions.

    Research Areas: inflammatory bowel disease, gastroenterology, nutrition, microbiota, genomics

    Principal Investigator

    Joanna Melia, M.D.

    Department

    Medicine

  • John M. Abraham Lab

    Researchers in the John M. Abraham Lab aim to develop new small-molecule cancer therapeutics. Recently, we worked on identifying novel decapeptides that can transfer 32P radioisotope—a tumor-ablating agent—to colon and esophageal adenocarcinoma cells. Our previous work involved using siRNA knockdown techniques and microarray technology to classify downstream genetic targets of regulator genes.

    Research Areas: cancer, 32P radioisotope, adenocarcinoma cells, molecular biology

    Principal Investigator

    John Abraham

    Department

    Medicine

  • Kirti Shetty Lab

    Research in the Kirti Shetty Lab seeks to understand the development of hepatocarcinogenesis in cirrhosis. Our ongoing translational research projects examine biomarkers for hepatocellular carcinoma and chemoprevention in cirrhosis patients.

    Research Areas: chemoprevention, cancer, cirrhosis, liver diseases, hepatocarcinogenesis

    Principal Investigator

    Kirti Shetty

    Department

    Medicine

  • Linda Lee Lab

    The Linda Lee Lab studies care of complex cancer patients who had liver or gastrointestinal issues. Our previous work includes studying the function of a cancer protein called Myc in liver cancer.

    Research Areas: cancer, gastrointestinal

    Principal Investigator

    Linda Lee, M.D.

    Department

    Medicine

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