Mutations in the PRSS1 gene are strongly associated with hereditary pancreatitis and lead to increased intrapancreatic trypsin activity.
NOT BSTOTAL BS
HARDLY BS — Verdict: Mostly True
Verified by Lenz ·
The Short Version
Established pathogenic PRSS1 variants such as R122H and N29I are definitively linked to hereditary pancreatitis and are well-supported by converging biochemical, animal model, and clinical genetics evidence as increasing intrapancreatic trypsin activity. The claim's unqualified reference to "PRSS1 mutations" slightly overgeneralizes, since not all PRSS1 variants produce the same functional effect. Additionally, direct measurement of increased intracellular trypsin in human patients remains limited, though the mechanistic evidence is strong.
Caveats
The claim applies most accurately to well-characterized high-penetrance gain-of-function PRSS1 variants (e.g., R122H, N29I); not all PRSS1 mutations have been shown to increase trypsin activity.
Direct evidence of increased intracellular trypsin activity in human patients is limited; the mechanistic support comes primarily from in vitro biochemical studies and animal models.
Hereditary pancreatitis is genetically heterogeneous — other genes such as SPINK1, CFTR, and CTRC can also contribute to or modify disease risk, so PRSS1 is a major but not exclusive cause.