Katie Garman, MD

Faculty Member, Duke Molecular Physiology Institute,

Position

Assistant Professor, Department of Medicine, Division of Gastroenterology,  Duke University Medical Center

Contact

Carmichael Building

919-684-1205

katherine.garman@duke.edu

Summary

The Garman laboratory focuses on injury, repair, and cancer development in the gastrointestinal tract. We perform translational research with the goal of improving health of the gastrointestinal tract.

Our work is based in observations from human clinical research. We use databases of esophageal and colon disease to learn more about clinical risk factors for disease. We also use pathology samples of tumors to study the gastrointestinal tract in different states: healthy, inflamed or damaged, and with cancer.

We use atypical models to study esophageal injury and repair (including endoscopy in a porcine model).

In order to better understand pathways involved in esophageal damage and repair, we use cell culture models, including 3D organotypic models.

 

MD, Duke University, Durham, NC

Current Studies

Project 1

Characterize responses to epithelial injury in esophageal submucosal glands (ESMGs). Using human tissue, characterize changes in sumucosal progenitor niche with and without different types of esophageal injury. Compare changes in progenitor/stem cell marker expression and submucosal myofibroblast injury before and after esophageal injury.

In human esophagus, we have identified ductal metaplasia in esophageal submucosal glands associated with esophageal adenocarcinoma (paper submitted).

Above: Normal ESMG

Below in A and B: ESMG with ductal metaplasia and inflammation

Project 2

Delineate the causes and consequences of submucosal progenitor niche activation using in vitro systems. Esophageal culture models are used to evaluate potential stem cell niches in the esophagus and growth factors associated with phenotypic outgrowths in culture.

Project 3

Dr. Garman is a member of The Cancer Genome Atlas Project Stomach/Esophageal working group. Through Duke’s Gastrointestinal Tissue Repository (Garman, PI), Duke contributed patient samples to this working group. Work is progressing on the first esophageal TCGA paper. The first gastric paper has been published. The paper describes four molecular  subtypes of gastric cancer: EBV-infected tumors (PIK3CA mutations, CDKN2A silencing, PD-L1/2 overexpression), MSI tumors (hypermutation), genomically stable tumors (diffuse histology, CDH1, RHOA mutations, cell adhesion), and chromosomally unstable tumors (intestinal histology, P53 mutations, RTK-RAS activation).

http://cancergenome.nih.gov/newsevents/newsannouncements/TCGA_STAD_press...

The paper: http://www.nature.com/nature/journal/v513/n7517/full/nature13480.html

Project 4

With a medicine resident, Alan Erdman, Dr. Garman and the Duke GI Women’s Group have identified knowledge gaps in ergonomics of endoscopy. We have designed a survey for GI endoscopists. We are working with the AGA Women’s Committee on this project.

https://www.gastro.org/about-aga/committees/women-s-committee

Staff

Christina Stolarchuk

Richard Von Furstenberg

Postdocs / Fellows

Farah Hussain

Graduate/Medical Students

Bhavya Allena

Omar Martinez-Uribe