The pathogenesis of chronic pancreatitis

Area of Science:

• Gastroenterology
• Pathology
• Pancreatic Diseases

Background:

• The evolutionary pathways of chronic pancreatitis lack a definitive consensus among researchers.
• Conflicting theories, such as the 'separate' versus 'necrosis-fibrosis sequence' hypotheses, highlight this ongoing debate.
• Existing hypotheses include de novo evolution driven by acinar hypersecretion and imbalances in pancreatic stone factors.

Purpose of the Study:

• To review and synthesize current understanding and hypotheses regarding the evolution of chronic pancreatitis.
• To explore unifying concepts in pancreatitis pathogenesis, including the role of acinar injury and oxidative stress.
• To discuss potential mechanisms underlying pain in minimal change chronic pancreatitis.

Main Methods:

• Literature review and synthesis of existing hypotheses on chronic pancreatitis evolution.
• Analysis of proposed pathogenic mechanisms, including acinar cell injury, fibrosis, and free radical pathways.
• Examination of etiological factors and their potential roles in disease progression.

Main Results:

• Multiple theories exist, including progression from acute pancreatitis and de novo evolution.
• The 'necrosis-fibrosis sequence' hypothesis revives the link between acute and chronic pancreatitis.
• A unifying concept proposes that the extent of acinar injury dictates the disease's natural history.
• Free radical release is suggested as a common endpoint for various pancreatitis etiologies.
• Pathogenesis of tropical calcifying pancreatitis may align with alcoholic chronic pancreatitis.
• Neurocrine and paracrine factors may explain pain in minimal change chronic pancreatitis.

Conclusions:

• The evolution of chronic pancreatitis is complex and multifactorial, with ongoing debate regarding its origins.
• A unifying theory based on the degree of acinar injury offers a potential framework for understanding pancreatitis progression.
• Further research into oxidative stress and neurocrine/paracrine mechanisms is warranted to fully elucidate pancreatitis pathogenesis.