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Volume 17, Issue 1
  • ISSN: 1874-4672
  • E-ISSN: 1874-4702
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Abstract

Background:

Pancreatic fibrosis is a hallmark feature of chronic pancreatitis (CP), resulting in persistent damage to the pancreas. The sustained activation of pancreatic stellate cells (PSCs) plays a pivotal role in the progression of pancreatic fibrosis and is a major source of extracellular matrix (ECM) deposition during pancreatic injury.

Methods:

Calpain is a calcium-independent lysosomal neutral cysteine endopeptidase and was found to be correlated to various fibrotic diseases. Studies have revealed that calpeptin, a calpain inhibitor, can improve the fibrosis process of multiple organs. This study investigated the effect of the calpain inhibitor, calpeptin, on fibrosis in experimental CP and activation of cultured PSCs in mice. CP was induced in mice by repeated injections of cerulein for four weeks , and the activation process of mouse PSCs was isolated and cultured . Then, the inhibitory effect of calpeptin on pancreatic fibrosis was confirmed based on the histological damage of CP, the expression of α-smooth muscle actin (α-SMA) and collagen-Iα1(Col1α1), and the decrease in mRNA levels of calpain-1 and calpain-2.

Results:

In addition, it was revealed that calpeptin can inhibit the activation process of PSCs and induce significant PSCs apoptosis by downregulating the expression of calpain-1, calpain-2 and TGF-β1, and the expression and phosphorylation of smad3 .

Conclusion:

These results suggest that the calpain inhibitor, calpeptin, plays a key role in the regulation of PSC activation by inhibiting the TGF-β1/smad3 signaling pathway, which supports the potential of calpeptin as an inhibitor of pancreatic fibrosis in mice by interfering with calpain.

© 2024 The Author(s). Published by Bentham Science Publisher.
This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: https://creativecommons.org/licenses/by/4.0/legalcode. This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
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2024-01-01
2024-11-29

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Calpain Inhibitor Calpeptin Improves Pancreatic Fibrosis in Mice with Chronic Pancreatitis by Inhibiting the Activation of Pancreatic Stellate Cells
Curr Mol Pharmacol 17, e18761429241425 (2024); https://doi.org/10.2174/0118761429241425231107044453
/content/journals/cmp/10.2174/0118761429241425231107044453
/content/journals/cmp/10.2174/0118761429241425231107044453
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  • Article Type:     Review Article
Keyword(s): Calpain; Calpeptin; Chronic pancreatitis; Pancreatic fibrosis; Pancreatic stellate cells; TGF-β1/smad3 signaling pathway

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