Abstract:
BACKGROUND AND STUDY AIMS:Expression of the forkhead/winged helix family of transcription factor P3+ regulatory T cells (FOXP3(+) Treg), a master gene of regulatory T cells (Treg) is observed in patients with autoimmune pancreatitis (AIP). We investigated the usefulness of detection of FOXP3(+) Treg in the main duodenal papilla for differential diagnosis between AIP and pancreatic cancer (Pca). PATIENTS AND METHODS:Firstly, we determined the cut-off value of FOXP3 expression in duodenal papilla taken from the patients with AIP (n = 22) and chronic pancreatitis (n = 21). Data from 32 patients with AIP and 30 patients with Pca who had undergone endoscopic biopsy were then studied. The numbers of FOXP3(+) Treg-positive lymphocytes and IgG4-positive plasma cells per high-power field (HPF) were counted in all the histopathological specimens. RESULTS:The areas under the receiver-operating characteristic (AUROC) curves for FOXP3(+) and IgG4 expression were 0.934 and 0.953, respectively. Cut-off values calculated based on AUROC data were 14/HPF in FOXP3 and 10/HPF in IgG4. Seropositivity for IgG4 was observed in 22 out of the 31 patients with AIP (sensitivity 71.0%, specificity 84.6%, accuracy 75.0%). Significant infiltration of the major duodenal papilla by FOXP3(+) lymphocytes (≥ 14/HPF) was recognized in 18 of the 32 patients with AIP (sensitivity 56.3%, specificity 100%, accuracy 77.4%). Significant infiltration of the major duodenal papilla by IgG4-positive plasma cells (≥ 10/HPF) was recognized in 27 of the 32 patients with AIP (sensitivity 84.4%, specificity 80.0%, accuracy 82.3%). CONCLUSIONS:Observation of FOXP3(+) cells in the main duodenal papilla may be useful in the differential diagnosis between AIP and Pca.
journal_name
J Hepatobiliary Pancreat Scijournal_title
Journal of hepato-biliary-pancreatic sciencesauthors
Kubota K,Kato S,Watanabe S,Fujita K,Yoneda M,Takahashi H,Inamori M,Shimamura T,Kirikoshi H,Kobayashi N,Saito S,Hisatomi K,Matsuhashi N,Nakajima Adoi
10.1007/s00534-010-0359-0subject
Has Abstractpub_date
2011-05-01 00:00:00pages
414-21issue
3eissn
1868-6974issn
1868-6982journal_volume
18pub_type
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