Rodger Alan Liddle, MD

Professor of Medicine
Faculty Network Member of the Duke Institute for Brain Sciences
Member of the Duke Cancer Institute
Campus mail 1033A GSRB-1 Bldg, Durham, NC 27710
Phone (919) 681-6380
Email address rodger.liddle@duke.edu

Our laboratory has two major research interests:

Enteroendocrine Cell Biology

Enteroendocrine cells (EECs) are sensory cells of the gut that send signals throughout the body.  They have the ability to sense food and nutrients in the lumen of the intestine and secrete hormones into the blood.  Our laboratory has had a longstanding interest in two types of EECs that regulate satiety and signal the brain to stop eating.   Cholecystokinin (CCK) is secreted from EECs of the upper small intestine and regulates the ingestion and digestion of food through effects on the stomach, gallbladder, pancreas and brain.  Peptide YY (PYY) is secreted from EECs of the small intestine and colon and regulates satiety.  We recently demonstrated that CCK and PYY cells not only secrete hormones but are directly connected to nerves through unique cellular processes called ‘neuropods’.  Our laboratory is devoted to understanding EECs signaling and its role in disease.

Pancreatitis

Pancreatitis is an inflammatory disease of the pancreas compounded by intrapancreaatic activation of digestive enzymes.  Our laboratory is studying the influence of nerves on the development of pancreatitis. Neurogenic inflammation results from the release of bioactive substances from sensory neurons in the pancreas causing vasodilatation, edema, and inflammatory cell infiltration producing tissue necrosis. Our goal is to identify the agents that activate sensory neurons, characterize the receptors on sensory nerves that mediate these actions, and determine the effects of neural stimulation on pancreatic injury with the long-term objective of developing strategies to reduce neurogenic inflammation to treat pancreatitis. 

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Education and Training

  • Gastroenterology Fellowship, Gastroenterology, University of California, San Francisco, 1981 - 1984
  • Residency, Generalinternal Medicine, University of California, San Francisco, 1979 - 1981
  • Internship, General Internal Medicine, University of California, San Francisco, 1978 - 1979
  • M.D., Vanderbilt University, 1978
  • B.S., University of Utah, 1972

Publications

Bohórquez, Diego V., Rashmi Chandra, Leigh Ann Samsa, Steven R. Vigna, and Rodger A. Liddle. “Characterization of basal pseudopod-like processes in ileal and colonic PYY cells..” J Mol Histol 42, no. 1 (February 2011): 3–13. https://doi.org/10.1007/s10735-010-9302-6.

PMID
21061049
Full Text

Chandra, Rashmi, Leigh Ann Samsa, Steven R. Vigna, and Rodger A. Liddle. “Pseudopod-like basal cell processes in intestinal cholecystokinin cells..” Cell Tissue Res 341, no. 2 (August 2010): 289–97. https://doi.org/10.1007/s00441-010-0997-1.

PMID
20582553
Full Text

Romac, Joelle M-J, Masaki Ohmuraya, Cathy Bittner, M Faraz Majeed, Steven R. Vigna, Jianwen Que, Brian E. Fee, Thomas Wartmann, Ken-ichi Yamamura, and Rodger A. Liddle. “Transgenic expression of pancreatic secretory trypsin inhibitor-1 rescues SPINK3-deficient mice and restores a normal pancreatic phenotype..” Am J Physiol Gastrointest Liver Physiol 298, no. 4 (April 2010): G518–24. https://doi.org/10.1152/ajpgi.00431.2009.

PMID
20110462
Full Text

Nathan, Jaimie D., Joelle Romac, Ruth Y. Peng, Michael Peyton, Don C. Rockey, and Rodger A. Liddle. “Protection against chronic pancreatitis and pancreatic fibrosis in mice overexpressing pancreatic secretory trypsin inhibitor..” Pancreas 39, no. 1 (January 2010): e24–30. https://doi.org/10.1097/MPA.0b013e3181bc45e9.

PMID
19904222
Full Text

Noble, M. D., J. Romac, S. R. Vigna, and R. A. Liddle. “A pH-sensitive, neurogenic pathway mediates disease severity in a model of post-ERCP pancreatitis..” Gut 57, no. 11 (November 2008): 1566–71. https://doi.org/10.1136/gut.2008.148551.

PMID
18625695
Full Text

Romac, Joelle M. J., Shannon J. McCall, John E. Humphrey, Jinseok Heo, and Rodger A. Liddle. “Pharmacologic disruption of TRPV1-expressing primary sensory neurons but not genetic deletion of TRPV1 protects mice against pancreatitis..” Pancreas 36, no. 4 (May 2008): 394–401. https://doi.org/10.1097/MPA.0b013e318160222a.

PMID
18437086
Full Text

Keel, Pamela K., Barbara E. Wolfe, Rodger A. Liddle, Kyle P. De Young, and David C. Jimerson. “Clinical features and physiological response to a test meal in purging disorder and bulimia nervosa..” Arch Gen Psychiatry 64, no. 9 (September 2007): 1058–66. https://doi.org/10.1001/archpsyc.64.9.1058.

PMID
17768271
Full Text

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