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dc.contributor.authorGoncalves de Medeiros, M. T.
dc.contributor.authorde Oliveira, R. B. [UNESP]
dc.contributor.authordos Santos, A. A.
dc.contributor.authorde Leopoldino, D. M.
dc.contributor.authorOliveira Lima, M. C.
dc.contributor.authorArrais Nobre, R.
dc.contributor.authorNobre e Souza, M. A.
dc.identifier.citationAlimentary Pharmacology & Therapeutics. Malden: Wiley-blackwell, v. 35, n. 5, p. 577-586, 2012.
dc.description.abstractBackgroundVisceral tone supposedly affects gut sensitivity in irritable bowel syndrome (IBS). Sildenafil increases nitric oxide and influences visceral compliance.AimTo evaluate the effects of sildenafil tone inhibition on rectal sensitivity.MethodsEight controls and 21 IBS patients (Rome II) were enrolled in a double-blind study, after dosing with placebo or sildenafil (50 mg p.o.). Thresholds for first sensation, first desire to defecate, pain and supraliminar pain were the sensory endpoints, measured with a barostat and 600-mL rectal bag. Pain (100-mm VAS) and depression-anxiety (Hamilton questionnaire) were scored.ResultsIrritable bowel syndrome rectal compliance and sensory-endpoint thresholds were similar to controls. Five IBS patients had pain threshold lower than controls 95% confidence interval (hypersensitive). Depression score was greater in IBS than controls (11.9 +/- 1.3 vs. 6.3 +/- 2.5, P = 0.036). In IBS, pain intensity was nonsignificantly higher (37.6 +/- 5.3 mm vs. 23.4 +/- 8.5 mm, P = 0.064) and supraliminar pain intensity was greater (45.6 +/- 5.4 mm vs. 25.9 +/- 5.1 mm, P = 0.044) than controls. IBS rectal relaxation increased volume (155.4 +/- 41.3 mL vs. 118.8 +/- 47.7 mL, P = 0.004) and tension (193.1 +/- 118.6 mmHg mL(-1) vs. 133.2 +/- 98.1 mmHg mL(-1), P = 0.019) for triggering first desire to defecate but not for other perceptions. Sildenafil increased volume for both first desire to defecate and pain in the hypersensitive IBS patients. Sildenafil increased rectal compliance only in diarrhoea-IBS. Mixed-IBS obtained higher anxiety (12.9 +/- 1.3 vs. 5.9 +/- 3.1, P < 0.05) and depression scores (13.9 +/- 1.9 vs. 6.3 +/- 2.5, P < 0.05) and reported more intense supraliminar pain (53.6 +/- 9.8 mm vs. 25.9 +/- 5.1 mm, P < 0.05) than controls.ConclusionsRectal relaxation following dosing with sildenafil 50 mg increased the first desire to defecate threshold in IBS as a whole, but decreased pain only in the hypersensitive subset. Mixed-IBS presented higher supraliminar pain and anxiety-depression scores.en
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.relation.ispartofAlimentary Pharmacology & Therapeutics
dc.sourceWeb of Science
dc.titleThe effects of sildenafil on rectal sensitivity and tone in patients with the irritable bowel syndromeen
dc.contributor.institutionUniversidade Federal do Ceará (UFC)
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.description.affiliationUniversidade Federal do Ceará (UFC), Dept Clin Med, BR-60430040 Fortaleza, Ceara, Brazil
dc.description.affiliationState Univ São Paulo, Dept Clin Med, São Paulo, Brazil
dc.description.affiliationUniversidade Federal do Ceará (UFC), Dept Physiol & Pharmacol, BR-60430040 Fortaleza, Ceara, Brazil
dc.description.affiliationUnespState Univ São Paulo, Dept Clin Med, São Paulo, Brazil
dc.rights.accessRightsAcesso restrito
dc.description.sponsorshipIdCNPq: 481098/2009-7[3]
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