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. 2007 Feb 21;13(7):1085-9.
doi: 10.3748/wjg.v13.i7.1085.

Possible role of human cytomegalovirus in pouchitis after proctocolectomy with ileal pouch-anal anastomosis in patients with ulcerative colitis

Damian Casadesus  1 , Tatsuo Tani, Toshifumi Wakai, Satoshi Maruyama, Tsuneo Iiai, Haruhiko Okamoto, Katsuyoshi Hatakeyama
Affiliations

Possible role of human cytomegalovirus in pouchitis after proctocolectomy with ileal pouch-anal anastomosis in patients with ulcerative colitis

Damian Casadesus et al. World J Gastroenterol. .

Abstract

Aim: To detect the presence of human cytomegalovirus (HCMV) proteins and genes on the ileal pouch of patients with ulcerative colitis who have undergone proctocolectomy with ileal pouch-anal anastomosis (IPAA).

Methods: Immunohistochemistry, polymerase chain reaction (PCR) and PCR sequencing methods were utilized to test the presence of HCMV in pouch specimens taken from 34 patients in 86 endoscopies.

Results: HCMV genes and proteins were detected in samples from 12 (35.2%) patients. The rate of detection was significant in the endoscopies from patients diagnosed with pouchitis (5 of 12, 41.6%), according to the Japanese classification of pouchitis, in comparison to patients with normal pouch (7 of 62, 11.2%; P = 0.021). In all patients with pouchitis in which the HCMV was detected, it was the first episode of pouchitis. The virus was not detected in previous biopsies taken in normal endoscopies of these patients. During the follow-up, HCMV was detected in one patient with recurrent pouchitis and in 3 patients whose pouchitis episodes improved but whose positive endoscopic findings persisted.

Conclusion: HCMV can take part in the inflammatory process of the pouch in some patients with ulcerative colitis who have undergone proctocolectomy with IPAA.

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Figures

Figure 1
Figure 1
Immunohistochemical staining for HCMV of biopsy samples from ileoanal pouch. Cells in the submucosa (arrows) show strong nuclear staining. Original magnification x 600.
Figure 2
Figure 2
Agarose gel showing UL32 gene products (lanes 1-4, 5 and 6) and UL 55 gene products (lanes 8-12). W: Water; N: HCMV-negative patient.
See this image and copyright information in PMC

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