Publication
Journal of Clinical Hepatology, Volume 42, Issue 2, 2026, pp. 400–408
Role and mechanism of mitochondrial calcium uniporter in the cytoskeleton of pancreatic ductal epithelial cells in a mouse model of acute pancreatitis
Publication extender
A mitochondrial calcium gateway may weaken the pancreatic duct barrier
Journal of Clinical Hepatology
What is it about?
Acute pancreatitis causes sudden inflammation and injury in the pancreas. The epithelial cells lining the pancreatic ducts form an important protective barrier, but the mechanisms that damage this barrier during pancreatitis are not fully understood.
Researchers investigated the mitochondrial calcium uniporter, or MCU—a protein that transports calcium into mitochondria. Excessive mitochondrial calcium can increase oxidative stress and may trigger ferroptosis, an iron-dependent form of cell death.
In a mouse model of acute pancreatitis, pancreatic injury was accompanied by increased MCU and ACSL4 expression and reduced GPX4 expression, a pattern consistent with ferroptosis. The researchers then reproduced aspects of pancreatitis in cultured human pancreatic ductal epithelial cells.
The treated cells accumulated iron and reactive oxygen species, lost antioxidant protection and showed disruption of their actin cytoskeleton. Their permeability also increased, indicating weakening of the epithelial barrier.
Blocking MCU activity reduced iron accumulation, oxidative stress and membrane damage while partly preserving the cytoskeleton. Directly inhibiting ferroptosis produced similar protective effects, whereas inducing ferroptosis worsened the cellular damage. Together, the findings suggest that MCU may contribute to pancreatic duct barrier disruption by promoting oxidative stress and ferroptosis.
Why is it important?
Around one in five patients with acute pancreatitis develops moderately severe or severe disease. Damage to the pancreatic duct barrier may allow bile, digestive enzymes and other harmful substances to reach pancreatic tissue, potentially worsening inflammation. This study proposes a biological chain linking mitochondrial calcium uptake to oxidative stress, ferroptosis, cytoskeletal disruption and increased barrier permeability. MCU may therefore offer a potential molecular target for protecting pancreatic duct cells during acute pancreatitis.
However, the animal experiment involved only 12 mice, and much of the mechanistic evidence came from a cultured cell line. The study also lacked some key measurements of lipid peroxidation needed to establish ferroptosis more comprehensively. Further animal studies and eventual clinical research are required before MCU inhibition can be considered a treatment strategy.
