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    Keywords: CELL ; DISEASE ; liver ; NEW-YORK ; GENE ; VARIANTS ; genetics ; DEGRADATION ; REPLICATION ; INDIVIDUALS ; HEALTHY ; heredity ; chronic pancreatitis ; pancreas ; VARIANT ; secretion ; PANCREATITIS ; ENZYME ; analysis ; USA ; LIVER-DISEASE ; HEREDITARY PANCREATITIS ; MISSENSE MUTATIONS ; FUNCTIONAL-ANALYSIS ; RATIO ; Replication studies ; CATIONIC TRYPSINOGEN GENE ; INHIBITOR GENE ; PRSS1 ; TROPICAL CALCIFIC PANCREATITIS
    Abstract: Chronic pancreatitis is a persistent inflammatory disease of the pancreas, in which the digestive protease trypsin has a fundamental pathogenetic role. Here we have analyzed the gene encoding the trypsin-degrading enzyme chymotrypsin C (CTRC) in German subjects with idiopathic or hereditary chronic pancreatitis. Two alterations in this gene, p.R254W and p.K247_R254del, were significantly overrepresented in the pancreatitis group, being present in 30 of 901 (3.3%) affected individuals but only 21 of 2,804 (0.7%) controls ( odds ratio (OR)=4.6; confidence interval (CI)=2.6 - 8.0; P=1.3x10(-7)). A replication study identified these two variants in 10 of 348 (2.9%) individuals with alcoholic chronic pancreatitis but only 3 of 432 ( 0.7%) subjects with alcoholic liver disease (OR=4.2; CI=1.2 - 15.5; P=0.02). CTRC variants were also found in 10 of 71 (14.1%) Indian subjects with tropical pancreatitis but only 1 of 84 (1.2%) healthy controls (OR=13.6; CI=1.7 - 109.2; P=0.0028). Functional analysis of the CTRC variants showed impaired activity and/or reduced secretion. The results indicate that loss-of-function alterations in CTRC predispose to pancreatitis by diminishing its protective trypsin-degrading activity
    Type of Publication: Journal article published
    PubMed ID: 18059268
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