[Show abstract][Hide abstract] ABSTRACT: Substantial proportion of Crohn's disease (CD) patients shows no response or a limited response to treatment with infliximab (IFX) and to identify biomarkers of response would be of great clinical and economic benefit. The expression profile of five genes (S100A8-S100A9, G0S2, TNFAIP6, and IL11) reportedly predicted response to IFX and we aimed at investigating their etiologic role through genetic association analysis. Patients with active CD (350) who received at least three induction doses of IFX were included and classified according to IFX response. A tagging strategy was used to select genetic polymorphisms that cover the variability present in the chromosomal regions encoding the identified genes with altered expression. Following genotyping, differences between responders and nonresponders to IFX were observed in haplotypes of the studied regions: S100A8-S100A9 (rs11205276(*)G/rs3014866(*)C/rs724781(*)C/rs3006488(*)A; P = 0.05); G0S2 (rs4844486(*)A/rs1473683(*)T; P = 0.15); TNFAIP6 (rs11677200(*)C/rs2342910(*)A/rs3755480(*)G/rs10432475(*)A; P = 0.10); and IL11 (rs1126760(*)C/rs1042506(*)G; P = 0.07). These differences were amplified in patients with colonic and ileocolonic location for all but the TNFAIP6 haplotype, which evidenced significant difference in ileal CD patients. Our results support the role of the reported expression signature as predictive of anti-TNF outcome in CD patients and suggest an etiological role of those top-five genes in the IFX response pathway.
Mediators of Inflammation 09/2015; 2015(170):318207. DOI:10.1155/2015/318207 · 3.24 Impact Factor
[Show abstract][Hide abstract] ABSTRACT: The outcomes of infliximab dose escalation in ulcerative colitis (UC) have not been well evaluated.
To assess the short- and long-term outcomes of infliximab dose escalation in a cohort of patients with UC.
This was a multicenter, retrospective, cohort study. All consecutive UC patients who had lost response to infliximab maintenance infusions and who underwent infliximab dose escalation were included. Post-escalation short-term clinical response and remission were evaluated. In the long term, the cumulative probabilities of infliximab failure-free survival and colectomy-free survival were calculated. Predictors of short-term response and event-free survival were estimated using logistic regression analysis and Cox proportional hazard regression analysis.
Seventy-nine patients were included. Fifty-four patients (68.4 %) achieved short-term clinical response and 41 patients (51.9 %) entered in clinical remission. After a median follow-up of 15 months [interquartile range (IQR) 8-26], 33 patients (41.8 %) had infliximab failure. Patients with short-term response had a significantly lower adjusted rate of infliximab failure [hazard ratio (HR) 0.24, 95 % confidence interval (CI) 0.12-0.49; p < 0.001]. During a median follow-up of 24 months (IQR 13-34), 9 patients (11.4 %) needed colectomy. Short-term response was identified as a predictor of colectomy avoidance (HR 0.14; 95 % CI 0.03-0.69; p < 0.007).
In UC patients who lost response to infliximab during maintenance, infliximab dose escalation enabled recovery of short-term response in nearly 70 % of patients. In the long term, 58 % of patients maintained sustained clinical benefit, and 9 of 10 avoided colectomy. Short-term response was associated with an 86 % reduction in the relative risk of colectomy.
[Show abstract][Hide abstract] ABSTRACT: The genetic analysis of ulcerative colitis (UC) has provided new insights into the etiology of this prevalent inflammatory
bowel disease. However, most of the heritability of UC (>70%) has still not been characterized. To identify new risk loci
for UC we have performed the first genome-wide association study (GWAS) in a Southern European population and undertaken a
meta-analysis study combining the newly genotyped 825 UC patients and 1525 healthy controls from Spain with the six previously
published GWAS comprising 6687 cases and 19 718 controls from Northern-European ancestry. We identified a novel locus with
genome-wide significance at 6q22.1 [rs2858829, P = 8.97 × 10−9, odds ratio (OR) (95% confidence interval, CI] = 1.12 (1.08–1.16)] that was validated with genotype data from a replication
cohort of the same Southern European ancestry consisting in 1073 cases and 1279 controls [combined P = 7.59 × 10−10, OR (95% CI) = 1.12 (1.08–1.16)]. Furthermore, we confirmed the association of 33 reported associations with UC and we nominally
validated the GWAS results of nine new risk loci (P < 0.05, same direction of effect). SNP rs2858829 lies in an intergenic region and is a strong cis-eQTL for FAM26F gene, a gene that is shown to be selectively upregulated in UC colonic mucosa with active inflammation. Our results provide
new insight into the genetic risk background of UC, confirming that there is a genetic risk component that differentiates
from Crohn's Disease, the other major form of inflammatory bowel disease.
Human Molecular Genetics 07/2014; 23(25). DOI:10.1093/hmg/ddu398 · 6.39 Impact Factor
[Show abstract][Hide abstract] ABSTRACT: Aim:
To compare the need for infliximab dose intensification in two cohorts of patients with Crohn's disease (CD) or ulcerative colitis (UC).
Single centre, uncontrolled, observational study. Consecutive patients with CD and UC who responded to infliximab induction doses were included. Data collected in a prospectively maintained database were retrospectively analysed. Differences in the rates of dose intensification per patient-month and the intensification-free survival time were compared. We also evaluated the interval between the first infliximab induction dose and the first infliximab escalated dose. The weight-adjusted infliximab administration costs were also calculated.
Fifty nine patients with CD and 38 patients with UC were enrolled. The rate of intensification per patient-month was 3.9% for UC and 1.4% for CD (P = 0.005). The median time from baseline to intensification was significantly shorter in UC compared to CD [6.6 mo (IQR: 4.2-9.5 mo) vs 10.7 mo (IQR: 8.9-11.7 mo), P = 0.005]. In the survival analysis, the cumulative probability of avoiding infliximab dose intensification was significantly higher in CD (P = 0.002). In the multivariate analysis, disease (UC vs CD) was the only factor significantly associated with dose intensification. The infiximab administration costs during the first year were significantly higher for UC compared to CD (mean ± SD 234.9 ± 53.3 Euros/kg vs 212.3 ± 15.1 Euros/kg, P = 0.03).
The rate of infliximab dose intensification per patient-month is significantly higher in UC patients. The infliximab administration costs are also significantly higher in patients with UC.
Journal of Crohn s and Colitis 07/2014; 20(27):9170-7. DOI:10.3748/wjg.v20.i27.9170 · 6.23 Impact Factor
[Show abstract][Hide abstract] ABSTRACT: Magnetic resonance enterography in Crohn disease management has been rapidly growing in importance during recent years. Being familiar to this technique is essential for radiologists and also, to some extent, for gastroenterologists. Our aim is to study and describe the imaging findings in magnetic resonance enterography in Crohn disease to develop a comprehensive and useful review article and imaging atlas.
[Show abstract][Hide abstract] ABSTRACT: Infliximab (IFX) is a valid treatment for Crohńs disease (CD), but a relevant percentage of patients do not benefit from this therapy. In the Japanese population, the response to IFX was associated with markers in the TNF receptor superfamily 1A (TNFRSF1A) and 1B (TNFRSF1B) genes. We aimed to replicate the association previously described in the Japanese population and to ascertain the role of TNF receptors as modulators of the response to IFX. We studied 297 white Spanish CD patients with a known response to IFX: 238 responders and 59 primary nonresponders. Four single nucleotide polymorphisms (SNPs) were analysed: rs767455 in TNFRSF1A and rs1061622, rs1061624 and rs3397 in TNFRSF1B. Comparisons between groups were performed with chi-square tests or the Fisheŕs exact test. Different features (sex, age, disease duration, smoking) were evaluated as possible confounding factors. No significant association was found between the studied TNFRSF1A polymorphisms and response to IFX. In the TNFRSF1B gene, the haplotype rs1061624_A-rs3397_T was significantly increased in nonresponders: p=0.015, OR=1.78, 95% CI 1.09-2.90; and an increased frequency of rs1061622_G carriers was observed in patients with remission: p=0.033 vs nonresponders and p=0.023 vs patients with a partial response. Our results support a role of TNFRSF1B gene variants in the response to IFX in CD patients.
Human immunology 10/2013; 75(1). DOI:10.1016/j.humimm.2013.09.017 · 2.14 Impact Factor
[Show abstract][Hide abstract] ABSTRACT: Background:
To evaluate the safety of thiopurines in patients with inflammatory bowel disease. To identify predictive factors associated with the development of thiopurine-induced adverse events.
Long-term incidence of adverse events was estimated in patients from a prospectively maintained Spanish nationwide database using Kaplan-Meier analysis. Cox regression analysis was performed to identify potential predictive factors of adverse events.
Three thousand nine hundred and thirty-one patients were included. Ninety-five percent of patients were on azathioprine. The median follow-up with thiopurines was 44 months (range, 0-420). Adverse events occurred at a median of 1 month after starting treatment. The cumulative incidence of adverse events was 26%, with an annual risk of 7% per patient-year of treatment. Most frequent adverse events were nausea (8%), hepatotoxicity (4%), myelotoxicity (4%), and pancreatitis (4%). Four patients had lymphoma. Female and Crohn's disease increased the risk of having nausea. The risk of hepatotoxicity was lower in females and higher in Crohn's disease. The risk of myelotoxicity was significantly higher in patients treated with mercaptopurine and in females. The risk of pancreatitis was higher in Crohn's disease. Overall, 17% of patients discontinued thiopurine treatment due to adverse events. Thirty-seven percent of these patients started thiopurines again and 40% of them had adverse events again.
As many as 1 of 4 patients on thiopurine therapy had adverse events during follow-up. A relatively high proportion of patients (17%) had to discontinue the treatment with thiopurines due to adverse events. However, more than half of patients that restarted thiopurine treatment after its discontinuation due to adverse events tolerated it. Several predictive factors for some adverse events have been identified.
[Show abstract][Hide abstract] ABSTRACT: Objective:
to describe the experience at two tertiary centres during the first year of use of magnetic resonance enterography (MRE) for the management of Crohn's disease (CD): indications and influence of the technique in clinical decision making.
Materials and methods:
retrospective descriptive study in which patients who underwent MRE were included consecutively. Epidemiological and clinical data were collected from the patients, as well as the indication for the study and how it influenced clinical decision making in the 10 days following the radiological study.
24 MREs were performed in suspected CD and 126 known CD; partial bowel obstruction in 53 patients (42%), monitoring of medical treatment in 34 (27%), due to incomplete ileocolonoscopy in 16 (13%), extension study of the small intestine in 15 (12%) and suspected complicated CD in 8 patients (6%). The MRE influenced in a change in treatment in 83 (55.3%) patients: 16 (10.7%) started with immunosuppressants, 41 (27.3%) with anti-TNFα were started on or switched, 15 (10%) were ordered surgery and in 3 (2%) changed from combined therapy to monotherapy. The MRE had less influence on clinical decision making in the group in which the indication was suspected CD (p < 0.05).
the use of MRE helped on decision making in more than half of patients, especially with regards to decisions related to the use of biological therapies and the indication for surgery. MRE was less useful in suspected CD patients.
Revista espanola de enfermedades digestivas: organo oficial de la Sociedad Espanola de Patologia Digestiva 12/2012; 104(11):578-583. DOI:10.4321/S1130-01082012001100005 · 1.41 Impact Factor
[Show abstract][Hide abstract] ABSTRACT: Objective: to describe the experience at two tertiary centres during the first year of use of magnetic resonance enterography (MRE) for the management of Crohn's disease (CD): indications and influence of the technique in clinical decision making. Material and method: retrospective descriptive study in which patients who underwent MRE were included consecutively. Epidemiological and clinical data were collected from the patients, as well as the indication for the study and how it influenced clinical decision making in the 10 days following the radiological study. Results: 24 MREs were performed in suspected CD and 126 known CD; partial bowel obstruction in 53 patients (42%), monitoring of medical treatment in 34 (27%), due to incomplete ileocolonoscopy in 16 (13%), extension study of the small intestine in 15 (12%) and suspected complicated CD in 8 patients (6%). The MRE influenced in a change in treatment in 83 (55.3%) patients: 16 (10.7%) started with immunosuppressants, 41 (27.3%) with anti-TNFα were started on or switched, 15 (10%) were ordered surgery and in 3 (2%) changed from combined therapy to monotherapy. The MRE had less influence on clinical decision making in the group in which the indication was suspected CD (p < 0.05). Conclusions: the use of MRE helped on decision making in more than half of patients, especially with regards to decisions related to the use of biological therapies and the indication for surgery. MRE was less useful in suspected CD patients.
Revista espanola de enfermedades digestivas: organo oficial de la Sociedad Espanola de Patologia Digestiva 12/2012; 104(11):578-583. · 1.41 Impact Factor
[Show abstract][Hide abstract] ABSTRACT: Objective:
Genome-wide association studies (GWAS) have identified multiple risk loci for Crohn's disease (CD). However, the cumulative risk exerted by these loci is low, and the likelihood that additional, as-yet undiscovered loci contribute to the risk of CD is very high. We performed a GWAS on a southern European population to identify new CD risk loci.
We genotyped 620 901 genome markers on 1341 CD patients and 1518 controls from Spain. The top association signals representing new candidate risk loci were subsequently analysed in an independent replication cohort of 1365 CD patients and 1396 controls.
We identified a genome-wide significant association on chromosome 22q13.2 in the intergenic region between the RBX1 and EP300 genes (single nucleotide polymorphism rs4820425, OR 1.27, 95% CI 1.17 to 1.38, p=3.42E-8). We also found suggestive evidence for the association of the IFNGR2 (21q22.11), FOXP2 (7q31), MACROD2 (20p12.1) and AIF1 (6p21.3) loci with CD risk.
In this GWAS performed on a southern European cohort, we have identified a new risk locus for CD between RBX1 and EP300. This study demonstrates that using populations of different ancestry is a useful strategy to identify new risk loci for CD.
Gut 08/2012; 62(10). DOI:10.1136/gutjnl-2012-302865 · 14.66 Impact Factor
[Show abstract][Hide abstract] ABSTRACT: Methotrexate is useful in inflammatory bowel disease (IBD), but its role is secondary because of its limited experience and a supposedly unfavorable safety profile.
To describe the efficacy and safety of methotrexate in a long-term real clinical practice.
Retrospectively reviewed records of IBD patients treated with methotrexate in eight hospitals of Madrid (Spain).
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.
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.
European journal of gastroenterology & hepatology 06/2012; 24(9):1086-91. DOI:10.1097/MEG.0b013e3283556db5 · 2.25 Impact Factor
[Show abstract][Hide abstract] ABSTRACT: Adalimumab is an effective treatment for Crohn's disease (CD), but may also be associated with loss of response. Few reports provide insight into the durability of treatment of CD with adalimumab for periods longer than 12 months in clinical practice. Aims: To evaluate the long-term durability of adalimumab maintenance treatment and to identify predictive factors associated with loss of response.
CD patients who initially responded to adalimumab were evaluated in a historical cohort study. Maintenance of long-term response was estimated using Kaplan-Meier analysis. Cox regression analysis was performed to identify potential predictive factors for loss of efficacy.
In all, 380 CD patients were included (mean age, 38 years; 52% female). Of these, 43% had ileocolic CD, 50% inflammatory CD, and 41% perianal CD. Median follow-up with adalimumab was 8 months (range, 4-75 months). The annual risk of loss of response to adalimumab was 18% per patient-year of follow-up. Twenty-eight percent of patients were anti-TNF-naïve and 72% anti-TNF-experienced. The loss of efficacy was 8% per patient-year of follow-up in the anti-TNF-naïve patients and 22% in the anti-TNF-experienced group (P < 0.01). In the multivariate analysis, the presence of extraintestinal manifestations (hazard ratio [HR] = 1.7; 95% confidence interval [CI] = 1.02-2.9) and previous experience with other anti-TNF agents (HR = 2.5,95% CI = 1.2-5.3) were associated with higher risk of loss of efficacy.
A relevant proportion of CD patients on long-term adalimumab lost response. The risk of loss of response was higher (more than 2-fold) in anti-TNF-experienced than in anti-TNF-naïve patients (22% vs. 8% per patient-year of treatment). Having extraintestinal manifestations seems to increase the risk of loss of efficacy.