Mutations in the serine protease inhibitor Kazal Type 1 (SPINK1) gene in Japanese patients with pancreatitis.
OBJECTIVE
Recent studies have shown an association between the N34S mutation in the serine protease inhibitor Kazal type 1 (SPINK1) gene and chronic pancreatitis (CP). We here examined the prevalence of SPINK1 mutations in Japanese patients with pancreatitis.


METHODS
Genomic DNA was prepared from 80 Japanese patients with CP, 36 patients with acute pancreatitis (AP), and 165 healthy controls. All exons and the promotor region of the SPINK1 gene were amplified by the polymerase chain reaction, and directly sequenced.


RESULTS
We found four types of mutation (N34S, IVS1-37T>C, -215G>A, and IVS3 + 2T>C) and two types of polymorphism (-253T>C and 272C>T). The N34S mutation cosegregated with IVS1-37T>C, and was present in 8 CP and 1 AP patients. The -215G>A mutation was in a complete linkage with IVS3 + 2T>C, and was present in 8 CP and 1 AP patients. The prevalences of [N34S; IVS1-37T>C] and [-215G>A; IVS3 + 2T>C] were significantly higher in patients with familial pancreatitis (38 and 13%, respectively) and with idiopathic CP (13 and 16%) than normal subjects (0.6 and 0%). In addition, the frequency of [N34S; IVS1-37T>C] mutation was higher in patients with autoimmune CP (33%).


CONCLUSIONS
The SPINK1 gene mutations were associated with pancreatitis also in Japan.
Kume
Kiyoshi
K
Division of Gastroenterology, Tohoku University Graduate School of Medicine, Sendai, Japan.
Masamune
Atsushi
A
Mizutamari
Hiroya
H
Kaneko
Kenzo
K
Kikuta
Kazuhiro
K
Satoh
Masahiro
M
Satoh
Kennichi
K
Kimura
Kenji
K
Suzuki
Noriaki
N
Nagasaki
Yutaka
Y
Horii
Akira
A
Shimosegawa
Tooru
T
D000208:Acute Disease; D000293:Adolescent; D000328:Adult; D000368:Aged; D002352:Carrier Proteins / Q000235:genetics* / Q000378:metabolism; D002648:Child; D002908:Chronic Disease; D004247:DNA / Q000235:genetics; D004252:DNA Mutational Analysis; D017931:DNA Primers / Q000737:chemistry; D005260:Female; D005787:Gene Frequency; D020022:Genetic Predisposition to Disease; D006801:Humans; D007564:Japan; D008297:Male; D008875:Middle Aged; D009154:Mutation; D010195:Pancreatitis / Q000235:genetics* / Q000378:metabolism / Q000473:pathology; D016133:Polymerase Chain Reaction; D012150:Polymorphism, Restriction Fragment Length; D014359:Trypsin Inhibitor, Kazal Pancreatic
D002352:Carrier Proteins; D017931:DNA Primers; C486642:SPINK1 protein, human; D014359:Trypsin Inhibitor, Kazal Pancreatic; D004247:DNA