Combined bicarbonate conductance-impairing variants in CFTR and SPINK1 variants are associated with chronic pancreatitis in patients without cystic fibrosis.
Combined bicarbonate conductance-impairing variants in CFTR and SPINK1 variants are associated with chronic pancreatitis in patients without cystic fibrosis.
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DOI:
10.1053/j.gastro.2010.10.045
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发表时间:
2011-01
期刊:
影响因子:
29.4
通讯作者:
Whitcomb DC
中科院分区:
文献类型:
--
作者:
Schneider A;Larusch J;Sun X;Aloe A;Lamb J;Hawes R;Cotton P;Brand RE;Anderson MA;Money ME;Banks PA;Lewis MD;Baillie J;Sherman S;Disario J;Burton FR;Gardner TB;Amann ST;Gelrud A;George R;Rockacy MJ;Kassabian S;Martinson J;Slivka A;Yadav D;Oruc N;Barmada MM;Frizzell R;Whitcomb DC
Idiopathic chronic pancreatitis (ICP) is a complex inflammatory disorder associated with multiple genetic and environmental factors. In individuals without cystic fibrosis (CF), variants of CFTR that inhibit bicarbonate conductance but maintain chloride conductance might selectively impair secretion of pancreatic juice, leading to trypsin activation and pancreatitis. We investigated whether sequence variants in the gene encoding the pancreatic secretory trypsin inhibitor, SPINK1, further increase the risk of pancreatitis in these patients. We screened patients with ICP (sporadic or familial) and controls for variants in SPINK1 associated with chronic pancreatitis (CP) risk (in exon 3) and in all 27 exons of CFTR. The final study group included 53 patients with sporadic ICP, 27 probands with familial ICP, and 150 unrelated controls, plus 503 controls for limited genotyping. CFTR wild-type (wt) and p.R75Q were cloned and expressed in HEK293 cells and relative conductances of HCO3− and Cl− were measured. SPINK1 variants were identified in 36% of subjects and 3% controls (odds ratio [OR]=16.5). One variant of CFTR that has not been associated with CF, p.R75Q, was found in 16% of subjects and 5.4% controls (OR=3.4). Co-inheritance of CFTR p.R75Q and SPINK1 variants occurred in 8.75% of patients and 0.15% controls (OR=62.5). Patch-clamp recordings of cells that expressed CFTR p.R75Q demonstrated normal chloride currents but significantly reduced bicarbonate currents (P=0.0001). The CFTR variant p.R75Q causes a selective defect in bicarbonate conductance and increases risk for pancreatitis. Co-inheritance of CF-associated, and some not associated, CFTR variants with SPINK1 variants significantly increase risk of ICP.
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DOI:
10.1097/meg.0b013e3282f36d04
发表时间:
2008-03-01
影响因子:
2.1
作者:
Augarten, Arie;Ben Tov, Amir;Yahav, Yaakov
通讯作者:
Yahav, Yaakov
影响因子:
5.2
作者:
Schürmann, M;Albrecht, M;Stuhrmann, M
通讯作者:
Stuhrmann, M
影响因子:
2.9
作者:
Keiles, Steven;Kammesheidt, Anja
通讯作者:
Kammesheidt, Anja
影响因子:
9.6
作者:
Shrikhande, SV;Martignoni, ME;Friess, H
通讯作者:
Friess, H
影响因子:
29.4
作者:
Noone, PG;Zhou, ZQ;Cohn, JA
通讯作者:
Cohn, JA