Network


Latest external collaboration on country level. Dive into details by clicking on the dots.

Hotspot


Dive into the research topics where R. Pajares is active.

Publication


Featured researches published by R. Pajares.


Alimentary Pharmacology & Therapeutics | 2011

Thiopurine methyl-transferase activity and azathioprine metabolite concentrations do not predict clinical outcome in thiopurine-treated inflammatory bowel disease patients

Yago González-Lama; Fernando Bermejo; Antonio López-Sanromán; Valle García-Sánchez; Maria Esteve; José Luis Cabriada; Adrian G. McNicholl; R. Pajares; Francesc Casellas; Olga Merino; Daniel Carpio; Maribel Vera; Carmen Muñoz; Marta Calvo; Luis-Miguel Benito; Luis Bujanda; F. J. García‐Fernández; Elena Ricart; Daniel Ginard; M. Velasco; J. A. Carneros; Noemí Manceñido; Alicia Algaba; C. Froilán; Carlos Cara; J. Maté; Luis Abreu; Javier P. Gisbert

Aliment Pharmacol Ther 2011; 34: 544–554


European Journal of Gastroenterology & Hepatology | 2007

Manometric findings in adult eosinophilic oesophagitis: a study of 12 cases.

Alfredo J. Lucendo; Pilar Castillo; Sonia Martín-Chávarri; G. Carrión; R. Pajares; Juan M. Pascual; Noemí Manceñido; J. C. Erdozain

Objective To describe the manometric findings detected in adult patients with dysphagia that were diagnosed of eosinophilic oesophagitis, and to compare with the cases of eosinophilic infiltration of the oesophagus reported in the literature. Patients and methods We present 12 adult patients diagnosed as suffering from this disorder in our department in a 1.5-year period, according to histological criteria and discarding any other cause of eosinophilic infiltration of the oesophagus. Stationary oesophageal manometry using a hydropneumocapillary perfusion system was performed in every case. The recommendations of the Spanish Group of Digestive Motility were followed for the interpretation of the results. In seven patients who presented motor disorder in manometric evaluation, treatment with steroid oesophageal lavage using fluticasone propionate was carried out and these patients were subsequently re-evaluated. Results All patients were young predominantly men, and the first endoscopic examination showed regular concentric stenosis or a ‘ring oesophagus’. Six patients had a severe nonspecific oesophageal motor disorder characterized by up to 80% of nontransmitted or very low-amplitude waves in the lower two-thirds of the organ. Three patients presented a manometric disturbance characterized by hyperkinetic peristaltic waves in distal oesophageal third. One patient had an alteration of the oesophageal motor dynamics characterized by 80% of deglutory complexes formed by a primary simultaneous wave in the two lower oesophageal thirds followed by a secondary peristaltic wave in 50% of cases that had a normal duration and amplitude. The remaining two patients had normal oesophageal motility. The upper oesophageal sphincter showed no alterations, and the manometric evaluation of the lower oesophageal sphincter tone proved normal in 10 patients, with slight hypotension in two cases. In seven of the nine patients who presented an oesophageal motor disorder, treatment with steroid oesophageal lavage using fluticasone propionate was administered and a new oesophageal manometry was performed afterwards, in which the motor disorder was clearly improved as soon as dysphagia, endoscopic lesions and histopathologic alteration disappeared. Discussion In the literature, 61 cases of eosinophilic infiltration of the oesophageal mucosa subjected to oesophageal manometric study had been described, and 60.6% of them showed evidence of different types of manometric alterations, mainly with spastic or hypercontractility characteristics. Although six of our cases showed very deficient peristalsis with very low-amplitude or nontransmitted waves, and in another three high-amplitude peristaltic waves were recorded. Motor disorders improved parallel to the disappearance of the eosinophilic infiltration of the mucosa. These data suggest that motor disorders in eosinophilic oesophagitis are a consequence of eosinophil infiltration of the oesophagus and should be considered in the differential diagnosis of dysphagia. These manometric alterations could be considered as primary nonspecific disorders and included in the ‘ineffective oesophageal motility’ group.


Helicobacter | 2007

Evolution of Helicobacter pylori Therapy from a Meta-analytical Perspective

Javier P. Gisbert; R. Pajares; José María Pajares

Even before the discovery of Helicobacter pylori as their cause, chronic gastritis and peptic ulcer disease were empirically treated with anti‐infectious agents. However, it was not until that finding that an antibiotic approach began to be used systematically. The main aim of this article is to review the evolution of H. pylori therapy from a meta‐analytical perspective. Initially, antibiotic monotherapy had a minor efficacy on H. pylori. Dual therapy including either bismuth compounds or proton‐pump inhibitors (PPI) and one antibiotic also resulted in insufficient cure rates. Bismuth‐based triple therapy (the first used) and PPI‐based triple therapies (combined with two antibiotics, including amoxicillin, nitroimidazole, or clarithromycin) have been the most widely recommended. PPI‐based regimens are superior to H2‐antagonist–based ones. The influence of the type of PPI, the dose and the duration of the treatment will be discussed. Among the factors influencing the efficacy of therapy, resistance to clarithromycin and metronidazole are the most important risk factors for eradication failure. Several rescue therapies can be used. Bismuth‐based quadruple therapy is effective, but the complexity of the regimen and the associated adverse effects limit the compliance. PPI‐based triple therapy with amoxicillin and levofloxacin is at least equally effective and better tolerated.


Gastroenterología y Hepatología | 2011

Adalimumab is effective in long-term real life clinical practice in both luminal and perianal Crohn's disease. The Madrid experience

José Ignacio Fortea-Ormaechea; Yago González-Lama; B. Casis; María Chaparro; Pilar López Serrano; Manuel Van Domselaar; Fernando Bermejo; R. Pajares; Ángel Ponferrada; María Isabel Vera; Pilar Martínez Montiel; Javier P. Gisbert; José L. Pérez-Calle; Antonio López San Román; Luis Abreu; Luis Menchén; Ignacio Marín-Jiménez

OBJECTIVE To evaluate effectiveness and safety of adalimumab in CD patients of the Madrid area and identify predictors of response. METHODS Multicenter retrospective survey of all CD patients treated with adalimumab in 9 hospitals of the Madrid area (Spain). Univariate and multivariate analysis of predictors of response was performed. RESULTS 174 patients included (50% males) with a median follow-up of 40 weeks. 30% had active perianal fistulizing disease at the beginning of the therapy with adalimumab. 59% had been previously treated with infliximab, being the lost of response (42.2%) the most frequent cause of withdrawal of the drug. 33% of patients needed dose escalation from every-other week to every week. The median time for this dose escalation was 33 weeks (range 2-120). The percentages of complete response at 4 weeks, 6 months and end of follow-up were 63, 70 and 63% in luminal disease and 49, 50 and 41% in perianal disease respectively. The prevalence of adverse events was 18% (most frequent was: 5 abscesses) causing the withdrawal of the drug in 21% of them. CONCLUSIONS Adalimumab is effective and safe for the management of CD, even in refractory cases to infliximab.


European Journal of Gastroenterology & Hepatology | 2012

Methotrexate in inflammatory bowel disease: a multicenter retrospective study focused on long-term efficacy and safety. The Madrid experience.

Yago González-Lama; Carlos Taxonera; Antonio López-Sanromán; José Lázaro Pérez-Calle; Fernando Bermejo; R. Pajares; Adrian G. McNicholl; Verónica Opio; Juan Luis Mendoza; Pilar López; Alicia Algaba; Jesús Estellés; Almudena Barbero; Jorge Mendoza; J. Maté; Javier P. Gisbert

Background Methotrexate is useful in inflammatory bowel disease (IBD), but its role is secondary because of its limited experience and a supposedly unfavorable safety profile. Aim To describe the efficacy and safety of methotrexate in a long-term real clinical practice. Methods Retrospectively reviewed records of IBD patients treated with methotrexate in eight hospitals of Madrid (Spain). Results A total of 77 patients were included (80% Crohn’s disease); 94% received methotrexate because of steroid dependency. Overall, 82% of the patients initially responded (28% remission). Eighty-eight percent of the patients followed maintenance treatment for a mean of 17 (range: 1–108) months. Forty percent of the patients lost response at a mean of 57 weeks after starting methotrexate. No statistically significant differences were found in the response rates in terms of the disease type, route of administration, or the Montreal Classification category. The mean methotrexate cumulative dose was 1108 mg (range: 25–6480). The main adverse events included 10 cases of gastrointestinal symptoms, four of myelotoxicity, and 10 of abnormal liver function tests, and led to methotrexate withdrawal in four (5%) patients. Transient elastography, performed in 46 patients, detected six additional cases with significant fibrosis and normal liver function tests. Conclusion Methotrexate is useful in inducing a response in IBD, although its efficacy decreases frequently through the follow-up. Although methotrexate seems safe in the long term, in addition to biochemical controls, a more accurate method to detect liver damage should be considered.


Gastroenterology | 2014

210 Management and Course of Inflammatory Bowel Disease Patients With Associated Cancer

Iván Guerra; Alicia Algaba; Elvira Quintanilla; José L. Pérez-Calle; María Concepción García-Sánchez; Carlos Taxonera; B. Casis; María Chaparro; Belén Botella; R. Pajares; María Dolores Martín Arranz; Ángel Castaño; Marisa Arias; Antonio López-Sanromán; Fernando Bermejo

DOP071 Inflammatory bowel diseases: a new cardiovascular risk factor? L. Caillo1 *, G. Danan1, V. Georgescu2, L. Papineau1, F. Gonzalez1, J.-F. Bourgaux3, F. Guillon4, G.-P. Pageaux1, R. Altwegg1 *. 1University Hospital of St Eloi, Departement of Hepatology and Gastroenterology, Montpellier, France, 2University Hospital, Department of Medical Information, Montpellier, France, 3University Hospital, Department of Hepatology and Gastroenterology, Nimes, France, 4University Hospital of St Eloi, Department of Digestive Surgery, Montpellier, France


Gastroenterology | 2012

Sa1902 Short- and Long-Term Outcomes of Infliximab Dose Intensification in Patients With Ulcerative Colitis

Carlos Taxonera; Manuel Barreiro-de Acosta; Marta Calvo; Cristina Saro; Guillermo Bastida; María Dolores Martín Arranz; Javier P. Gisbert; Valle García-Sánchez; Ignacio Marín-Jiménez; Fernando Bermejo; María Chaparro; Angel Ponferrada Diaz; Ignacio Fernández-Blanco; Pilar Martínez-Montiel; R. Pajares; Celia de Gracia; David Olivares; Fermin Estremera Arevalo; Juan Luis Mendoza

Shortand Long-Term Outcomes of Infliximab Dose Intensification in Patients With Ulcerative Colitis Carlos Taxonera, Manuel Barreiro-de Acosta, Marta Calvo, Cristina Saro, Guillermo Bastida, Maria Dolores Martin Arranz, Javier P. Gisbert, Valle Garcia-Sanchez, Ignacio Marin-Jimenez, Fernando Bermejo, Maria Chaparro, Angel Ponferrada Diaz, Ignacio Fernandez-Blanco, Pilar Martinez-Montiel, R. Pajares, Celia de Gracia, David Olivares, Fermin Estremera Arevalo, Juan L. Mendoza


Alimentary Pharmacology & Therapeutics | 2018

Short and long-term effectiveness and safety of vedolizumab in inflammatory bowel disease: results from the ENEIDA registry

María Chaparro; Ana Garre; Elena Ricart; Marisa Iborra; Francisco Mesonero; Isabel Vera; Sabino Riestra; Valle García-Sánchez; M. Luisa De Castro; Albert Martin-Cardona; Xavier Aldeguer; Miguel Minguez; Manuel Barreiro de-Acosta; Montserrat Rivero; Fernando Muñoz; Montserrat Andreu; Ana Bargalló; Carlos González-Muñoza; José Lázaro Pérez Calle; M F García-Sepulcre; Fernando Bermejo; José María Huguet; José Luis Cabriada; Ana Gutiérrez; Míriam Mañosa; Albert Villoria; Ana Y. Carbajo; Rufo Lorente; Santiago García-López; Marta Piqueras

Effectiveness of vedolizumab in real world clinical practice is unknown.


Gastroenterology | 2015

Tu1107 Adalimumab Dose Escalation Is Effective for Managing Loss of Response in Ulcerative Colitis

Carlos Taxonera; Eva Iglesias Flores; Fernando Muñoz; Marta Calvo; Manuel Barreiro-de Acosta; David Busquets; Xavier Calvet; Antonio Rodríguez; R. Pajares; Javier P. Gisbert; Pilar López-Serrano; José Lázaro Pérez-Calle; Angel Ponferrada Diaz; Cristobal De la Coba; Fernando Bermejo; María Chaparro; Cristina Alba; David Olivares; Ignacio Fernández-Blanco

Adalimumab Dose Escalation Is Effective for Managing Loss of Response in Ulcerative Colitis Carlos Taxonera, Eva Iglesias Flores, Fernando Munoz, Marta Calvo, Manuel Barreiro-de Acosta, David Busquets, Xavier Calvet, Antonio Rodriguez, R. Pajares, Javier P. Gisbert, Pilar Lopez-Serrano, Jose Lazaro Perez-Calle, Angel Ponferrada Diaz, Cristobal De la Coba, Fernando Bermejo, Maria Chaparro, Cristina Alba, David Olivares, Ignacio Fernandez-Blanco


Inflammatory Bowel Diseases | 2009

Oral and intravenous iron treatment in inflammatory bowel disease: hematological response and quality of life improvement.

Javier P. Gisbert; Fernando Bermejo; R. Pajares; J.L. Pérez-Calle; María Rodríguez; Alicia Algaba; Noemí Manceñido; Felipe de la Morena; J.A. Carneros; Adrian G. McNicholl; Yago González-Lama; J. Maté

Collaboration


Dive into the R. Pajares's collaboration.

Top Co-Authors

Avatar

Fernando Bermejo

King Juan Carlos University

View shared research outputs
Top Co-Authors

Avatar

Javier P. Gisbert

Autonomous University of Madrid

View shared research outputs
Top Co-Authors

Avatar

Carlos Taxonera

Complutense University of Madrid

View shared research outputs
Top Co-Authors

Avatar

María Chaparro

Autonomous University of Madrid

View shared research outputs
Top Co-Authors

Avatar

J. Maté

Autonomous University of Madrid

View shared research outputs
Top Co-Authors

Avatar

Noemí Manceñido

Hospital Universitario La Paz

View shared research outputs
Top Co-Authors

Avatar

Adrian G. McNicholl

Instituto de Salud Carlos III

View shared research outputs
Top Co-Authors

Avatar
Top Co-Authors

Avatar
Top Co-Authors

Avatar

Xavier Calvet

Autonomous University of Barcelona

View shared research outputs
Researchain Logo
Decentralizing Knowledge