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Published on: August 7, 2015
Inflammation-Induced Claudin-2 Up-Regulation Limits Pancreatitis Development by Enhancing Pancreatic Ductal Transport
Sneha Kesaraju1, Yueying Li2, Junjie Xing1
1Department of Pathology, The University of Chicago, Chicago, Illinois.
Gastroenterology
|May 16, 2026
Summary
Claudin-2 (CLDN2) is crucial for pancreatic fluid secretion and protection against pancreatitis. Its absence worsens pancreatitis, suggesting CLDN2 modulation as a therapeutic target.
Area of Science:
- Gastroenterology
- Molecular Biology
- Genetics
Background:
- Genome-wide association studies link X-linked CLDN2 gene polymorphisms to chronic pancreatitis risk.
- CLDN2 encodes claudin-2, a paracellular channel protein involved in tight junctions.
- The precise role of CLDN2 in pancreatitis pathogenesis was previously unclear.
Purpose of the Study:
- To investigate the role of CLDN2 in the onset and progression of pancreatitis.
- To determine how CLDN2 expression is regulated and its functional impact on pancreatic ductal epithelium.
Main Methods:
- Analysis of human pancreatic tissues and mouse models of pancreatitis.
- Assessment of CLDN2 expression, regulation by cytokines (IFNγ), and impact on inflammation and fibrosis.
- Functional studies using pancreatic ductal epithelial organoids and isolated mouse pancreatic ducts to evaluate fluid transport.
Main Results:
- CLDN2 was upregulated in human chronic pancreatitis and mouse models, with IFNγ induction observed.
- CLDN2 knockout mice exhibited exacerbated pancreatitis severity in both acute and chronic models.
- CLDN2 is essential for sodium-dependent water transport and cAMP-driven, CFTR-dependent fluid secretion in pancreatic ducts.
Conclusions:
- CLDN2 upregulation is a response to pancreatic inflammation, and its absence worsens disease.
- CLDN2 plays a protective role by facilitating pancreatic ductal fluid output, limiting autodigestion and inflammation.
- Targeting pancreatic ductal CLDN2 function offers a potential therapeutic strategy for pancreatitis.
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