Pathophysiological mechanisms in acute pancreatitis: Current understanding.

Area of Science:

• Gastroenterology and Hepatology
• Cell Biology
• Immunology

Background:

• The pathophysiology of acute pancreatitis (AP) involves complex intracellular events within pancreatic acinar cells.
• Historically, the trypsin-centered hypothesis dominated research, but recent findings highlight additional factors like oxidative stress and mitochondrial dysfunction.
• Despite advances, clinical outcomes for AP patients have not significantly improved, indicating gaps in understanding.

Purpose of the Study:

• To review and highlight current knowledge on the molecular mechanisms underlying acute pancreatitis.
• To explore the transition from acinar cell injury to local and systemic inflammation in AP.
• To identify potential therapeutic targets by examining inflammatory markers and immune system activation.

Main Methods:

• Literature review of recent basic science research and experimental animal models.
• Analysis of studies focusing on intracellular perturbations in pancreatic acinar cells.
• Synthesis of data on inflammatory pathways and immune responses in AP.

Main Results:

• While pancreatic enzyme activation is a known factor, other mechanisms like oxidative stress, endoplasmic reticulum stress, impaired autophagy, and mitochondrial dysfunction contribute to acinar cell injury.
• The precise molecular pathways linking acinar cell injury to inflammation are not fully elucidated.
• Limited data exists on human pancreatitis, with most information derived from animal models.

Conclusions:

• Current understanding of AP pathophysiology is incomplete, particularly regarding the mechanisms of acinar cell injury and subsequent inflammation.
• Further investigation into inflammatory markers and immune system activation is essential for developing effective therapeutic interventions.
• Translating findings from experimental models to human AP requires more research.