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Tursi A, Brandimarte G, Elisei W, Picchio M, Forti G, Pianese G, Rodino S, D'Amico T, Sacca N, Portincasa P, Capezzuto E, Lattanzio R, Spadaccini A, Fiorella S, Polimeni F, Polimeni N, Stoppino V, Stoppino G, Giorgetti GM, Aiello F, Danese S. Randomised clinical trial: mesalazine and/or probiotics in maintaining remission of symptomatic uncomplicated diverticular disease--a double-blind, randomised, placebo-controlled study. Aliment Pharmacol Ther 2013; 38:741-51. [PMID: 23957734 DOI: 10.1111/apt.12463] [Citation(s) in RCA: 77] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/07/2013] [Revised: 07/31/2013] [Accepted: 08/01/2013] [Indexed: 12/11/2022]
Abstract
BACKGROUND Placebo-controlled studies in maintaining remission of symptomatic uncomplicated diverticular disease (SUDD) of the colon are lacking. AIM To assess the effectiveness of mesalazine and/or probiotics in maintaining remission in SUDD. METHODS A multicentre, double-blind, placebo-controlled study was conducted. Two hundred and ten patients were randomly enrolled in a double-blind fashion in four groups: Group M (active mesalazine 1.6 g/day plus Lactobacillus casei subsp. DG placebo), Group L (active Lactobacillus casei subsp. DG 24 billion/day plus mesalazine placebo), Group LM (active Lactobacillus casei subsp. DG 24 billion/day plus active mesalazine), Group P (Lactobacillus casei subsp. DG placebo plus mesalazine placebo). Patients received treatment for 10 days/month for 12 months. Recurrence of SUDD was defined as the reappearance of abdominal pain during follow-up, scored as ≥5 (0: best; 10: worst) for at least 24 consecutive hours. RESULTS Recurrence of SUDD occurred in no (0%) patient in group LM, in 7 (13.7%) patients in group M, in 8 (14.5%) patients in group L and in 23 (46.0%) patients in group P (LM group vs. M group, P = 0.015; LM group vs. L group, P = 0.011; LM group vs. P group, P = 0.000; M group vs. P group, P = 0.000; L group vs. P group, P = 0.000). Acute diverticulitis occurred in six group P cases and in one group L case (P = 0.003). CONCLUSION Both cyclic mesalazine and Lactobacillus casei subsp. DG treatments, particularly when given in combination, appear to be better than placebo for maintaining remission of symptomatic uncomplicated diverticular disease. (ClinicalTrials.gov: NCT01534754).
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Affiliation(s)
- A Tursi
- Gastroenterology Service, ASL BAT, Andria (BT), Italy.
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2
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Castelli E, Fiorella S, Caputo V. Pili annulati coincident with alopecia areata, autoimmune thyroid disease, and primary IgA deficiency: case report and considerations on the literature. Case Rep Dermatol 2012; 4:250-5. [PMID: 23275769 PMCID: PMC3531941 DOI: 10.1159/000345469] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Pili annulati is a rare autosomal dominant hair disorder clinically characterized by a pattern of alternating bright and dark bands of the hair, the bright bands appearing dark if observed by transmitted light. This pattern is due to the periodic occurrence of air-filled cavities along the hair cortex which scatter and reflect the light while precluding its transmission. A susceptibility region, including a possibly responsible Frizzled gene, has been mapped to the telomeric region of chromosome 12q, although a specific mutation has not been identified. The condition has sometimes been observed in concurrence with alopecia areata, and in this paper we report a case in whom the concomitant severe alopecia areata was associated with autoimmune thyroid disease and primary IgA deficiency - a quadruple complex which, to our knowledge, has never been previously described. The occurrence of multiple immune disorders in the same patient affected by pili annulati could represent a key to understanding the high prevalence of alopecia areata in this condition. Specifically, in individuals predisposed to autoimmune disease, the molecular alterations that cause the anatomical changes of pili annulati could prompt the immune response against the hair root that underlies alopecia areata.
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Affiliation(s)
- E Castelli
- Department of Dermatology, University of Palermo, Palermo, Italy
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Caputo V, Fiorella S, Orlando E. Postsurgical paracicatricial cutaneous satellitosis of giant cell tumour of the tendon sheath, localized type. Case Rep Dermatol 2011; 3:118-23. [PMID: 21720527 PMCID: PMC3124449 DOI: 10.1159/000328999] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Tenosynovial giant cell tumour (localized type) is a tumour of tendon sheaths and interphalangeal joints, affecting the digits and arising from the synovium. It is characterized by a proliferation of mononuclear cells and osteoclast-like polykaryocytes. Its propagation to the skin is an exceptional event, which can take place either in localized form in the fingertips (localized type) or in the rare diffuse form called giant cell tumour of the tendon sheath (diffuse type). We report here a case of giant cell tumour with cutaneous satellites, which appeared close to and around the surgical scar following the excision of the primary lesion, in a 9-year-old boy. In the cutaneous satellites, a few signs of transformation could be observed, consisting of the lack of stroma and pronounced cellularity characterized by sheets of rounded synovial-like cells admixed with multinucleated giant cells and xanthoma cells. No relapse was observed 1 year after a plastic surgery procedure (complete replacement of the involved skin). Diffuse lesions usually represent a diagnostic problem in comparison with their localized counterparts. The malignant transformation of an originally typical tenosynovial giant cell tumour is a rare but well-documented event. Our case seems to represent a typical example because the pronounced cellularity might wrongly lead to a diagnosis of malignancy.
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Affiliation(s)
- V Caputo
- Department of Dermatology, University of Palermo, Palermo, Italy
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Vincent D, Le Gallic L, Launay JM, Fiorella S, Fabre C. Rôle des auto-anticorps anti-DAO dans l’urticaire chronique dépendant de l’histamine alimentaire. Rev Med Interne 2008. [DOI: 10.1016/j.revmed.2008.10.131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Niro GA, Fontana R, Gioffreda D, Fiorella S, Accadia L, Iacobellis A, Caruso N, Conoscitore P, Andriulli A. Sequential treatment with lamivudine and alpha-interferon in anti-HBe-positive chronic hepatitis B patients: a pilot study. Dig Liver Dis 2007; 39:857-63. [PMID: 17652045 DOI: 10.1016/j.dld.2007.06.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/19/2007] [Revised: 06/05/2007] [Accepted: 06/06/2007] [Indexed: 12/11/2022]
Abstract
BACKGROUND In chronic hepatitis B, long-term use of alpha interferon is hampered by side effects, and long-term treatment with nucleos(t)ide analogues is burdened by drug-resistant mutants. We hypothesized that alternate rounds of lamivudine and alpha interferon might circumvent previous shortcomings. AIM To evaluate efficacy of sequential lamivudine or IFN-alpha2b monotherapies in preventing occurrence of tyrosine-methionine-aspartate-aspartate (YMDD) mutants and achieving virological and biochemical response. METHODS Fifteen patients with hepatitis B surface antigen, anti-HBe-positive chronic hepatitis received four consecutive rounds of monotherapy with lamivudine (100 mg/day), IFN-alpha2b (5MU/tiw), lamivudine, IFN-alpha2b. Serum HBV-DNA levels were evaluated during and off treatment, HBV polymerase and pre-core/core regions sequenced. RESULTS End-of-treatment response was achieved in 10 patients (67%). One patient did not respond, a second developed genotypic resistance at week 24. A rebound in viremia occurred in three patients at week 48. Six patients (40%) remained sustained responders. Triple promoter mutations at nucleotides 1762-1764-1896 prevailed in non-responders (60%) as compared to responders (20%). L180M/M204V mutations were identified during virological breakthrough. CONCLUSION Sequential approach of alternate rounds of lamivudine or interferon may help patients to tolerate a prolonged schedule of therapy and protect them from emergence of viral strains.
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Affiliation(s)
- G A Niro
- Division of Gastroenterology, Casa Sollievo Sofferenza Hospital, IRCCS, San Giovanni Rotondo, Italy.
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Vincent D, Fiorella S, Fabre C. Étude étiologique prospective d'une cohorte de 93 patients souffrant d'urticaire chronique: place de l'étiologie histamine alimentaire. Rev Med Interne 2006. [DOI: 10.1016/j.revmed.2006.10.087] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Bassotti G, D'Onofrio V, Battaglia E, Fiorella S, Dughera L, Iaquinto G, Mazzocchi A, Morelli A, Annese V. Treatment with botulinum toxin of octo-nonagerians with oesophageal achalasia: a two-year follow-up study. Aliment Pharmacol Ther 2006; 23:1615-9. [PMID: 16696811 DOI: 10.1111/j.1365-2036.2006.02907.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
BACKGROUND Treatment of oesophageal achalasia with intrasphincteric injections of botulinum toxin has proved to be a successful alternative treatment modality. However, little is known about its long-term effects in very old patients. AIM To evaluate the effects of such treatment in octo-nonagerians during a 2-year follow-up period. PATIENTS AND METHODS Thirty-three patients with idiopathic oesophageal achalasia (range 81-94 years) entered the study. After basal evaluation and screening procedures, 100 U of botulinum toxin was injected at the lower oesophageal sphincter, and the procedure was repeated 1 month later. Data were collected at baseline and were compared after 1 and 2 years following the procedure. RESULTS Seventy-eight per cent of patients were considered responders at 1 year and 54% were considered responders at 2 years. The weight gain at the end of the follow-up period was 2 (0-3) kg. No significant relationship was found between baseline lower oesophageal sphincter pressure and symptoms score after 1 and 2 years of follow-up; moreover, no major complications of botulinum toxin therapy were reported. CONCLUSION Treatment of very old achalasic patients with botulinum toxin is safe, effective and yields good quality of life in a substantial proportion of these subjects.
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Affiliation(s)
- G Bassotti
- Gastroenterology and Hepatology Section, Department of Clinical and Experimental Medicine, University of Perugia, Perugia, Italy.
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8
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Andriulli A, Annese V, Caruso N, Pilotto A, Accadia L, Niro AG, Quitadamo M, Merla A, Fiorella S, Leandro G. Proton-pump inhibitors and outcome of endoscopic hemostasis in bleeding peptic ulcers: a series of meta-analyses. Am J Gastroenterol 2005; 100:207-19. [PMID: 15654802 DOI: 10.1111/j.1572-0241.2005.40636.x] [Citation(s) in RCA: 72] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
OBJECTIVE To perform meta-analyses of studies on outcome of bleeding ulcers of different proton-pump inhibitors (PPIs) regimens, after stratification of patients by endoscopic stigmata, and analysis of studies with and without endotherapy. METHODS A total of 35 randomized trials comparing PPIs to placebo and/or H2-receptor antagonists (H2RAs) in 4,843 patients with high-risk endoscopic stigmata were retrieved. Outcomes were rebleeding, surgery, and mortality. RESULTS Monotherapy with oral or bolus PPIs was superior to placebo and H2RAs in reducing rebleeding in both bleeders and nonbleeders at index endoscopy; the need for surgery was reduced only when compared to H2RAs. In nonbleeders, PPI monotherapy was as effective as a combination of endotherapy with H2RAs. A combination of endotherapy with PPIs was superior to monotherapy in reducing bleeding and surgery, and superior to endotherapy alone in minimizing rebleeding, but not surgery; the benefit was lost when confronted to endotherapy plus H2RAs, whether PPIs were given as infusion or bolus. By pooling data from studies comparing high doses of PPIs as continuous infusion versus regular doses as intermittent bolus, rebleeding, surgery, and mortality were not significantly different. CONCLUSIONS Combination of endotherapy with either PPIs or H2RAs is indicated for nonbleeding ulcers at endoscopy with the intent to reduce rebleeding and surgery. Its value may extend to bleeding lesions, but current data are scanty. The benefit appears to be independent from route and doses of PPIs, as oral, bolus, or infusional methods are all effective.
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Affiliation(s)
- A Andriulli
- Divisions of Gastroenterology and Geriatrics, Casa Sollievo della Sofferenza Hospital, IRCCS, San Giovanni Rotondo, Italy
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9
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Bassotti G, Fiorella S, Roselli P, Modesto R. Use of polyethylene glycol solution in slow transit constipation. Ital J Gastroenterol Hepatol 1999; 31 Suppl 3:S255-6. [PMID: 10726231] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/15/2023]
Abstract
Patients with long-standing functional slow-transit constipation were treated with low daily doses of polyethylene glycol solutions. Bowel frequency, stool consistency and colonic transit time improved markedly during the treatment. No relevant side-effects were reported during the study period.
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Affiliation(s)
- G Bassotti
- Department of Gastroenterology and Digestive Endoscopy, University of Perugia, Italy
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Bassotti G, Iantorno G, Fiorella S, Bustos-Fernandez L, Bilder CR. Colonic motility in man: features in normal subjects and in patients with chronic idiopathic constipation. Am J Gastroenterol 1999; 94:1760-70. [PMID: 10406232 DOI: 10.1111/j.1572-0241.1999.01203.x] [Citation(s) in RCA: 85] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The human colon is still a relatively unknown viscus, especially concerning its motor activity. However, in recent years, techniques have been perfected that allow a better understanding of colonic motility, especially through prolonged recording periods. In this way, it has been demonstrated that the viscus contracts according to a circadian trend, is responsive to physiological stimuli (meals, sleep), and features high amplitude, propulsive contractions that are part of the complex dynamic of the defecatory process. These physiological properties and their alterations in patients with chronic idiopathic constipation are reviewed in this article.
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Affiliation(s)
- G Bassotti
- Clinica di Gastroenterologia ed Epatologia, Dipartimento di Medicina Clinica e Sperimentale, Università di Perugia, Italy
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Bassotti G, Germani U, Fiorella S, Roselli P, Brunori P, Whitehead WE. Intact colonic motor response to sudden awakening from sleep in patients with chronic idiopathic (slow-transit) constipation. Dis Colon Rectum 1998; 41:1550-5; discussion 1555-6. [PMID: 9860337 DOI: 10.1007/bf02237305] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
PURPOSE There are few data about the relationships between colonic motor behavior and higher brain functions, such as sleep. Previous studies were done in healthy subjects, and it is unknown whether patients with functional motor disorders of the colon behave differently. This study was designed to characterize colonic motor activity in patients with constipation, both during sleep and after sudden awakening, and to compare it with that of healthy subjects. Our working hypothesis was that patients with constipation would have an impaired response to sudden awakening. PATIENTS AND METHODS Twelve chronically constipated women, 22 to 49 years old, were recruited for the study, and their data were compared with those obtained from 12 healthy female volunteers, 21 to 38 years old. Manometric studies were performed in the descending and sigmoid colon for 30 minutes during sleep (immediately before awakening) and 30 minutes after being awakened suddenly. A motility index was calculated before and after the stimulus. RESULTS In both groups motility in the descending and the sigmoid colon was almost absent during sleep and significantly increased after sudden awakening. No difference in postawakening values was found between patients with constipation and controls. CONCLUSIONS In patients with chronic constipation, the brain-gut control of some fundamental mechanisms governing colonic motility is preserved. These data suggest that the alterations of colonic motility described in chronic constipation may be caused by an intrinsic dysfunction of the viscus.
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Affiliation(s)
- G Bassotti
- Department of Clinical and Experimental Medicine, University of Perugia, Italy
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12
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Bassotti G, De Giorgio R, Stanghellini V, Tonini M, Barbara G, Salvioli B, Fiorella S, Corinaldesi R. Constipation: a common problem in patients with neurological abnormalities. Ital J Gastroenterol Hepatol 1998; 30:542-8. [PMID: 9836115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
Abstract
Constipation is a frequent complaint among patients with different neurological diseases. This review provides a brief account of the numerous conditions affecting the central, peripheral and intrinsic (enteric) nervous systems in which constipation can be the only clinical manifestation or a component of a complex syndrome. Recent neuropathophysiological acquisitions show that any structural or functional impairment of the intrinsic innervation of the gut, including both developmental (i.e., Hirschsprung's disease and intestinal neuronal dysplasia) and acquired (i.e., either degenerative or inflammatory neuropathies) disorders, can be associated with constipation. Constipation may also arise from derangements of the peripheral nervous system, including diabetes and primary chronic autonomic failure (pandysautonomias). Finally, in the central nervous system, a wide array of disorders (post-traumatic, degenerative, ischaemic or neoplastic) are recognized to determine bowel dysfunction, ultimately leading to constipation. Further understanding of the fine pathophysiological mechanisms through which the intrinsic and extrinsic nerve supplies to the digestive system are involved in idiopathic constipation or in diseases generating this symptom will hopefully lead to a better treatment of this frequent pathological condition.
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Affiliation(s)
- G Bassotti
- Department of Clinical and Experimental Medicine, University of Perugia, Italy
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Bassotti G, Fiorella S, Germani U, Roselli P, Battaglia E, Morelli A. The nutcracker esophagus: a late diagnostic yield notwithstanding chest pain and dysphagia. Dysphagia 1998; 13:213-7. [PMID: 9716752 DOI: 10.1007/pl00009574] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The nutcracker esophagus, a primary motor disorder, is frequently associated with noncardiac chest pain. However, there are no data on whether its diagnosis, as in other esophageal motility disorders, is delayed. Since the disorder is frequently heralded by alarming symptoms such as chest pain and dysphagia, diagnosis should be made as soon as possible. In this study we assessed the diagnostic delay, if any, in patients with the nutcracker esophagus. Moreover, we were interested in whether the abnormalities described in the distal esophagus could also involve the entire viscus. Fifty-four subjects (age range 23-78 yr) with the nutcracker esophagus were assessed for clinical and manometric variables as an overall group and after dividing them into subgroups according to their symptoms. The manometric variables were compared with those obtained in 61 controls (age range 21-67 yr). Overall, a diagnosis of nutcracker esophagus was made after an average period of 36 +/- 6 months, and surprisingly, this was not different in the various subgroups complaining of either chest pain, dysphagia, or both. Analysis of manometric variables showed that the mean amplitude of contractions was significantly higher in the patients' group at all esophageal body levels, even in the proximal portions. Again, there were no significant differences among the subgroups of nutcracker esophagus with respect to the symptoms. Notwithstanding the presence of alarming symptoms, such as chest pain and dysphagia, the nutcracker esophagus is diagnosed on average after 3 years from the onset of symptoms. Manometric assessment seems to confirm that this entity may indeed represent a primary esophageal motor disorder. The major dysfunction is due to an abnormal increase of contraction amplitude of the entire esophageal body.
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Affiliation(s)
- G Bassotti
- Gastrointestinal Motility Laboratory, GI and Hepatology Section, Department of Clinical and Experimental Medicine, University of Perugia School of Medicine, Perugia, Italy
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14
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Bassotti G, Fiorella S. Oesophageal pressure during an earthquake. Lancet 1998; 351:806. [PMID: 9519961 DOI: 10.1016/s0140-6736(05)78934-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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Bassotti G, Calcara C, Annese V, Fiorella S, Roselli P, Morelli A. Nifedipine and verapamil inhibit the sigmoid colon myoelectric response to eating in healthy volunteers. Dis Colon Rectum 1998; 41:377-80. [PMID: 9514436 DOI: 10.1007/bf02237495] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
BACKGROUND Constipation is not an infrequent side effect complained of by patients taking calcium channel blockers. This effect may reduce patients' compliance and yield potentially serious consequences. However, the underlying mechanisms for constipation caused by such compounds are not known. AIMS The purpose of the present study was to assess the effects of nifedipine and verapamil on the sigmoid myoelectric response to eating, a physiologic test of colonic motor function. SUBJECTS AND METHODS Nine healthy male volunteers with no previous abdominal surgery were recruited for the study and underwent three paired studies at two-week intervals. Myoelectric sigmoid activity was recorded by means of two clip electrodes introduced within the viscus without preparation for 30 minutes basally and 90 minutes postprandially. Each study was preceded by placebo, nifedipine (20 mg), or verapamil (120 mg). RESULTS Analysis of the tracings revealed that nifedipine strongly inhibited the sigmoid myoelectric response to the meal. This response was also significantly reduced in those taking verapamil compared with the placebo group, although to a much lesser extent than in those taking nifedipine. CONCLUSIONS We conclude that constipation as a result of some calcium channel blockers may be caused by inhibition of colonic motor activity by nifedipine and, to a lesser extent, by verapamil. The latter compound probably displays other mechanisms (reduced colonic transit, increased water absorption) also responsible for this side effect.
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Affiliation(s)
- G Bassotti
- Department of Clinical Medicine, University of Perugia Medical School, Italy
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Ceci LR, Ambrosini M, Fiorella S, Gallerani R. Detection of a conserved arrangement of three tRNA genes in the sunflower mitochondrial genome. Identification, mapping and expression of trnC-trnN-trnY genes. Biochem Mol Biol Int 1994; 32:1161-1172. [PMID: 8061634] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
The genes coding for tRNA-Cys (trnC), tRNA-Asn (trnN) and tRNA-Tyr (trnY) have been sequenced in a region of about 3.0 kb of the sunflower mitochondrial DNA. The trnC and trnY are genuine mitochondrial genes, while the trnN gene has a chloroplast origin. Despite their heterologous origin the three genes are transcribed. Their arrangement is the first detected in a highly conserved form in a specific group of advanced dicots.
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MESH Headings
- Base Sequence
- Blotting, Northern
- DNA, Mitochondrial/chemistry
- DNA, Mitochondrial/genetics
- Genes, Plant
- Helianthus/genetics
- Molecular Sequence Data
- Nucleic Acid Hybridization
- Polymerase Chain Reaction
- RNA, Transfer, Amino Acid-Specific/genetics
- RNA, Transfer, Asn/chemistry
- RNA, Transfer, Asn/genetics
- RNA, Transfer, Cys/chemistry
- RNA, Transfer, Cys/genetics
- RNA, Transfer, Tyr/chemistry
- RNA, Transfer, Tyr/genetics
- Sequence Alignment
- Sequence Homology, Nucleic Acid
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Affiliation(s)
- L R Ceci
- Sezione di Trani del Centro di Studio sui Mitocondri e Metabolismo Energetico, C.N.R., Trani, Italia
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