Search for: rheumatoid arthritis methotrexate autoimmune disease biomarker gene expression GWAS HLA genes non-HLA genes
ID | PMID | Title | PublicationDate | abstract |
---|---|---|---|---|
24823404 | Atypical cutaneous features in adult onset Still's disease. | 2014 May | Adult onset Still's disease is a rare but potentially serious disease. We present five cases of adult-onset Still's disease seen by us over a period of one year. The patients were all females and 28-39 years of age. Symptoms had been present for 2-6 weeks in three patients. The other two had been on a few years' follow-up for rheumatoid arthritis before the onset of rashes and fever. The patients had persistent erythematous maculopapular eruptions on face, body and extremities, with moderate to severe pruritus and/or a burning sensation that decreased their quality of life. The typical evanescent rash was not observed. High ferritin values were detected in all the patients and total serum IgE was increased in two. All the patients were started on oral prednisolone (0.5-1.0 mg/kg/day), and methotrexate (10-15 mg/week) had to be added in three patients. One patient was started on tocilizumab due to recalcitrant disease and one was lost to follow-up. Further investigation and classification of the various atypical cutaneous findings in adult-onset Still's disease is necessary. | |
23415142 | Determination of methotrexate and folic acid by ion chromatography with electrochemical de | 2013 Mar 29 | A simple and sensitive method was developed for simultaneous determination of methotrexate (MTX) and folic acid (FA) by ion chromatography with electrochemical detection (IC-ECD). Quaternary amine functionalized multi-wall carbon nanotubes (q-MWNTs) modified glassy carbon electrode (GCE) was used as an amperometric sensor to determine MTX and FA. The electrochemical behaviors of MTX and FA at the q-MWNTs/GCE were studied by cyclic voltammetry (CV). Results indicated that this modified electrode exhibited electrocatalytic oxidation toward MTX and FA with high sensitivity, stability and long life. Good separation of MTX and FA was demonstrated by IC on an anion-exchange column with phosphate buffer solution (PBS) as eluent. Under the optimal conditions, the linear ranges were from 0.01 to 20mg/L for both MTX and FA with correlation coefficients r ≥ 0.9994. The obtained detection limits (LODs) for MTX and FA were 0.2 and 0.4 μg/L (S/N=3), respectively. The method has been successfully applied to the determination of MTX and FA in plasma and urine of patients of rheumatoid arthritis. | |
23928094 | Safety, tolerability, pharmacokinetics, and pharmacodynamics of anti-TWEAK monoclonal anti | 2013 Aug | BACKGROUND: Persistent upregulation of signaling by cytokine tumor necrosis factor-like weak inducer of apoptosis (TWEAK) through its receptor fibroblast growth factor-inducible molecule-14 (Fn14) promotes chronic inflammation and tissue destruction. OBJECTIVE: The aim of this study was to explore the safety and tolerability of the TWEAK-blocking monoclonal antibody BIIB023 and determine its pharmacokinetics and effects on TWEAK pathway pharmacodynamic markers in rheumatoid arthritis (RA). METHODS: Phase I, first-in-human, 2-part, multicenter, double-blind, dose-escalation study. Patients were randomized to a single dose of BIIB023 (0.03-20 mg/kg) (n = 38) or placebo (n = 15) as an add-on to methotrexate. Three open-label cohorts of RA patients taking background disease-modifying antirheumatic drugs and stable tumor necrosis factor (TNF) inhibitor therapy (n = 12) received a single-dose of BIIB023 of 2, 10, or 20 mg/kg and were assessed over 70 days. RESULTS: The incidence of treatment-emergent adverse events for the BIIB023 monotherapy cohorts and open-label cohorts of BIIB023 as add-on therapy to TNF inhibitors compared with placebo were 47% and 50% versus 33%, respectively. Serum exposure to BIIB023 increased in a dose-dependent manner from 0.03 to 20 mg/kg, but not in direct proportion to dose level. After administration, the time course of BIIB023 serum concentration was multiphasic and showed expedited elimination when levels decreased to < 10 µg/mL. Serum-soluble TWEAK levels were suppressed at all dose levels by 6 hours post-dose and recovered to baseline between days 7 and 28. A trend toward downward modulation of serum biomarkers of inflammatory response was suggested in monocyte chemoattractant protein 1, inducible protein 10, macrophage inflammatory protein 1β, and tissue inhibitor of metalloproteinase 1 in the BIIB023 group versus placebo. CONCLUSIONS: Single-dose BIIB023 showed a favorable safety and tolerability profile in RA. Suppression of serum-soluble TWEAK for ≤ 28 days was observed and downward trends in serum biomarkers suggested. | |
24154755 | [Atypical tumor regression]. | 2013 Nov | A 67-year-old man presented with a poorly differentiated squamous cell carcinoma of the esophagus diagnosed by biopsy. After neoadjuvant radiochemotherapy the gastroesophagectomy specimen showed diffuse polymorphic and anuclear cell residues ranging from 35 µm to 46 µm in size. Immunohistochemically, PanCK and AE1-3 revealed a positive staining while CD68 and MIB1 showed a negative staining. The retrospective anamnesis revealed that the patient had chronic polyarthritis as underlying illness, for which reason he had been taking humira and methotrexate, a cytostatic drug, for many years. Therefore, the development of the tumor might have been enhanced by these drugs. Electron microscopic analysis confirmed that the avital akaryote cell residues represented a special type of tumor regression. Complete tumor regression level IV without vital rest tumor tissue based on Baldus et al. was diagnosed. | |
23010097 | Adult-onset Still's disease: clinical, serological and therapeutic considerations. | 2013 Jan | OBJECTIVES: This paper aims to describe the clinical manifestations, laboratory abnormalities and treatment of adult-onset Still's disease (AOSD) in Greek patients. METHODS: This is a retrospective observational study. Forty-four patients, diagnosed with AOSD, followed since 1985 up to June 2011, were included. The disease course and treatment were recorded and compared to previously published studies. RESULTS: Twenty-one males and 23 females were identified. Mean age at diagnosis was 38.3 years. The most common clinical manifestations were fever (100%), arthralgias (97.7%), arthritis (93.2%), salmon-coloured rash (84%), myalgias (50%) and sore throat (38.6%). Characteristic laboratory abnormalities were leucocytosis with neutrophilia (81.8%), elevated C-reactive protein (100%) and erythrocyte sedimentation rate (100%). Elevated liver enzymes and hyperferritinaemia were found in 50% and in 59% of the patients respectively. Very high ferritin serum levels (>5000 μg/l) were found in 22.7%. Rheumatoid factor and antinuclear antibodies were negative in all patients. Thirty patients (68.2%) received non-steroidal anti-inflammatory drugs or aspirin with or without corticosteroids. Response to corticosteroids was common (58.9%). When this treatment was ineffective, a disease-modifying anti-rheumatic drug (DMARD), usually methotrexate, was added with a response rate of 63.6%. Anakinra was used in cases resistant to conventional immunosuppressive treatment. Ten out of 44 patients (22.7%) were treated with anakinra and response was achieved in all of them. CONCLUSIONS: Our results regarding clinical manifestations and laboratory abnormalities were similar to those of previous reports. High ferritin serum levels were reported in all studies of AOSD and are considered as diagnostically valuable. When treatment with corticosteroids and DMARDS had failed, biologic agents such as anakinra were successfully applied. | |
23645988 | Comorbidity profile among patients with rheumatoid arthritis and the impact on prescriptio | 2013 | Comorbid conditions play a pivotal role in rheumatoid arthritis management and outcomes. We estimated the percentage of comorbid illness among rheumatoid arthritis patients and explored the relationship between this comorbidity and different prescriptions. A cross-sectional study of patients with rheumatoid arthritis in three centers in Saudi Arabia was carried out. Comorbidity and antirheumatoid medication regimens prescribed were recorded on a specially designed Performa. The association between comorbidity and different drugs was analyzed. A total of 340 patients were included. The most comorbidities were hypertension 122 (35.9%), diabetes 105 (30.9%), osteoporosis 88 (25.8%), and dyslipidemia in 66 (19.4). The most common drug prescribed was prednisolone in 275 (80.8%) patients followed by methotrexate in 253 (74.4%) and biological therapy in 142 (41.5%) patients. Glucocorticoids were prescribed considerably more frequently in hypertensive and diabetic patients as well as in patients with osteoporosis and dyslipidemia. Most patients with rheumatoid arthritis suffered from comorbid diseases. | |
24812514 | Comparative clinical utility of once-weekly subcutaneous abatacept in the management of rh | 2014 | Biologic therapies in rheumatoid arthritis are now part of standard practice for disease that proves difficult to control with conventional disease-modifying anti-rheumatic drugs. While anti-tumor necrosis factor therapies have been commonly used, other targeted biologic therapies with different mechanisms of action are becoming increasingly available. Abatacept is a recombinant fusion protein that inhibits the T-cell costimulatory molecules required for T-cell activation. Intravenous abatacept has good clinical efficacy with an acceptably low toxicity profile in rheumatoid arthritis, but the subcutaneous mode of delivery has only recently become available. In this article, we examine key efficacy and safety data for subcutaneous abatacept in rheumatoid arthritis, incorporating evidence from five large Phase III studies that included people with an inadequate response to methotrexate and an inadequate response to biologic disease-modifying anti-rheumatic drugs. The results demonstrate that subcutaneous abatacept has efficacy and safety comparable with that of intravenous abatacept and adalimumab. In addition, inhibition of radiographic progression at year 1 in relatively early rheumatoid arthritis is consistent with that of adalimumab. Subcutaneous abatacept is well tolerated, with very low rates of discontinuation in both short-term and long-term follow-up. | |
25674479 | Rituximab for pulmonary lymphomatoid granulomatosis which developed as a complication of m | 2014 | We report the case of a patient with Rheumatoid Arthritis [RA] presenting with clinical-pathological and radiological features of Pulmonary Lymphomatoid Granulomatosis (PLG). This is a rare lung disorder characterized by multiple nodular lesions with lymphocytic invasion of vascular walls. We present one such case of PLG secondary to Methotrexate and Azathioprine therapy, who was successfully treated with Steroids and Rituximab. We wish to highlight the importance of lung biopsy in the diagnosis and the use of rituximab as a treatment modality for RA as well as PLG. | |
24746812 | Repair of radiographic hip joint in juvenile rheumatoid arthritis patients treated with et | 2014 Oct | For patients suffering from rheumatoid arthritis (RA), structural damage, i.e. bone erosion and joint space narrowing, is a major factor leading to functional disability. Negative radiographic progression has been shown in joints, especially in RA patients treated with tumor necrosis factor alpha (TNFα) inhibitors in combination with methotrexate. Bone erosion repair in small joints have been observed but only one study selected large weight-bearing joints. We reported 2 cases of patients with severe seropositive juvenile RA who shown improvement of joint space narrowing and subchondral erosion in hip joint when treated with etanercept in combination with methotrexate for at least 1year. Two Japanese cases were also published but with different TNF inhibitors. The mechanisms of bone erosion or joint space narrowing repair are unclear. One study investigated whether bone erosions in rheumatoid arthritis patients show evidence of repair in metacarpophalangeal joints when treated with TNF inhibitors and MTX. These results suggested that repair in RA emerged from the bone marrow and the endosteal lining rather than the periosteal compartment. No study investigated joint space narrowing repair in hip joint in rheumatoid arthritis patients. Larger studies needed to confirm joint space narrowing improvement in hip joint in patients treated with TNF inhibitors and to explain the mechanisms of repair. | |
25232526 | Efficacy and safety of tofacitinib for treatment of rheumatoid arthritis. | 2014 Sep 18 | Tofacitinib is the first in a new class of nonbiologic disease-modifying antirheumatic drugs (DMARDs), a targeted, synthetic DMARD, approved for the treatment of rheumatoid arthritis (RA) as monotherapy or in combination with methotrexate or other non-biologic DMARD. Tofacitinib, an orally administered Janus kinase (JAK) inhibitor, decreases T-cell activation, pro-inflammatory cytokine production, and cytokine signaling by inhibiting binding of type I cytokine receptors family and γ-chain cytokines to paired JAK1/JAK3 receptors. The net effect of tofacitinb's mechanism of action is decreased synovial inflammation and structural joint damage in RA patients. To date, six phase 3 trials have been conducted to evaluate the safety and efficacy of tofacitinib under the oral rheumatoid arthritis triaLs (ORAL) series. This review describes the pharmacology of the novel agent, tofacitinib, and details the safety and efficacy data of the ORAL trials. | |
23997576 | Pharmacotherapy options in rheumatoid arthritis. | 2013 | Drugs form the mainstay of therapy in rheumatoid arthritis (RA). Five main classes of drugs are currently used: analgesics, non-steroidal anti-inflammatories (NSAIDs), glucocorticoids, nonbiologic and biologic disease-modifying antirheumatic drugs. Current clinical practice guidelines recommend that clinicians start biologic agents if patients have suboptimal response or intolerant to one or two traditional disease modifying agents (DMARDs). Methotrexate, sulfasalazine, leflunomide and hydroxychloroquine are the commonly used DMARDs. Currently, anti-TNF is the commonly used first line biologic worldwide followed by abatacept and it is usually combined with MTX. There is some evidence that tocilizumab is the most effective biologic as a monotherapy agent. Rituximab is generally not used as a first line biologic therapy due to safety issues but still as effective as anti-TNF. The long term data for the newer oral small molecule biologics such as tofacitinib is not available and hence used only as a last resort. | |
30235560 | Rheumatoid Arthritis Disease Progression Modeling. | 2013 Nov | Time progression models provide a significant advantage in developing clinical trials and can also be used to elicit comparisons among therapeutic agents. The authors performed a meta-analysis to construct a time progression model for rheumatoid arthritis (RA), an area of significant interest for pharmaceutical development, using the ACR20 end point. Compounds studied were chiefly monoclonal antibodies that were used in conjunction with methotrexate. The study shows that an exponential time response model adequately fits the data. From the modeling, a distribution of effects for biological RA therapies can be provided. | |
24657513 | Adult-onset Still's disease. | 2014 Jul | First described in 1971, adult-onset Still's disease (AOSD) is a rare multisystemic disorder considered as a complex (multigenic) autoinflammatory syndrome. A genetic background would confer susceptibility to the development of autoinflammatory reactions to environmental triggers. Macrophage and neutrophil activation is a hallmark of AOSD which can lead to a reactive hemophagocytic lymphohistiocytosis. As in the latter disease, the cytotoxic function of natural killer cells is decreased in patients with active AOSD. IL-18 and IL-1β, two proinflammatory cytokines processed through the inflammasome machinery, are key factors in the pathogenesis of AOSD; they cause IL-6 and Th1 cytokine secretion as well as NK cell dysregulation leading to macrophage activation. The clinico-biological picture of AOSD usually includes high spiking fever with joint symptoms, evanescent skin rash, sore throat, striking neutrophilic leukocytosis, hyperferritinemia with collapsed glycosylated ferritin (<20%), and abnormal liver function tests. According to the clinical presentation of the disease at diagnosis, two AOSD phenotypes may be distinguished: i) a highly symptomatic, systemic and feverish one, which would evolve into a systemic (mono- or polycyclic) pattern; ii) a more indolent one with arthritis in the foreground and poor systemic symptomatology, which would evolve into a chronic articular pattern. Steroid- and methotrexate-refractory AOSD cases benefit now from recent insights into autoinflammatory disorders: anakinra seems to be an efficient, well tolerated, steroid-sparing treatment in systemic patterns; tocilizumab seems efficient in AOSD with active arthritis and systemic symptoms while TNFα-blockers could be interesting in chronic polyarticular refractory AOSD. | |
25077842 | Chronic arthritis and cardiovascular disease: altered blood parameters give rise to a prot | 2014 Dec | OBJECTIVE: Rheumatoid arthritis, and to a lesser extent ankylosing spondylitis and psoriatic arthritis, associates with increased morbidity and mortality due to cardiovascular complications. We hypothesized that the increased risk of cardiovascular disease is reflected by changes in blood parameters that are compatible with a prothrombotic propensity. To substantiate this notion, we performed an extensive literature search identifying such parameters. METHODS: A search through PubMed (1970-2013) was done to find primary articles with the following search terms: rheumatoid arthritis, ankylosing spondylitis, psoriatic arthritis or synovial fluid. These were combined with keywords reflecting processes of atherothrombosis: atherosclerosis, cardiovascular disease, coagulation, endothelial, fibrinolysis, mean platelet volume, microparticle, platelet, platelet count and mass, thrombosis, and thrombus. RESULTS: The published studies point to a multitude of blood-related processes that can contribute to a prothrombotic propensity in chronic inflammatory diseases. These include an increase in platelet mass; low-level platelet activation, enforced by interaction with leukocytes and the formation of proinflammatory cytokines; a locally activated endothelium; and an increased coagulant activity. Patient treatment with methotrexate or TNF-α blockers appears to result in normalization of several of these prothrombotic parameters. CONCLUSION: This analysis provides a first identification of the mechanisms by which inflammatory arthritis can aggravate cardiovascular disease. | |
23858337 | Targeting interleukin-17 in patients with active rheumatoid arthritis: rationale and clini | 2013 Jun | Clinical and experimental evidence suggest that interleukin-17A (IL-17A; also known as IL-17) is an attractive therapeutic target in rheumatoid arthritis (RA). Rheumatoid synovial tissue produces IL-17A, which causes cartilage and bone degradation in synovial and bone explants. Overexpression of IL-17A induces synovial inflammation and joint destruction in animal RA models. These effects are attenuated in IL-17A-deficient animals and by agents that block IL-17A. Serum IL-17A levels and, to a greater extent, synovial fluid IL-17A levels are elevated in many patients with RA. In some RA cohorts, higher IL-17A levels have been associated with a more severe clinical course. Several IL-17A blockers, including the anti-IL-17A monoclonal antibodies secukinumab and ixekizumab, and the anti-IL-17 receptor subunit A monoclonal antibody brodalumab have been evaluated in phase II clinical trials. Of these, secukinumab is the most advanced with respect to clinical evaluation in RA, with phase III trials ongoing in patients on background methotrexate who had inadequate responses to previous tumor necrosis factor blocker therapy. | |
25342995 | Experience with subcutaneous abatacept for rheumatoid arthritis: an update for clinicians. | 2014 Oct | Abatacept is recommended by several expert consensus groups including the 2013 update of the EULAR recommendations for the pharmacologic management of rheumatoid arthritis (RA), as a potential choice for biologic therapy for patients with RA. Initially developed, studied, and approved as an intravenous (IV) formulation, abatacept is now also available as a subcutaneous (SC) injection. Having both options available makes abatacept a particularly versatile agent for the management of RA, greatly expanding the population of patients who could benefit from this treatment. This review provides a summary of the most important clinical trials that have investigated this molecule in both of its formulations, with a focus on the more recent trials evaluating the SC formulation, specifically the AMPLE study, the first major trial evaluating two biologic agents (abatacept and the tumor necrosis factor (TNF)-inhibitor adalimumab) in a head-to-head manner. In that study, SC abatacept was found to have an efficacy profile similar to that of SC adalimumab, both in combination with methotrexate. | |
26760745 | The Preventive Effects of Nanopowdered Peanut Sprout-added Caciocavallo Cheese on Collagen | 2014 | The present study was carried out to investigate the effects of nanopowdered peanut sprout-added Caciocavallo cheese (NPCC) on the prevention and treatment of rheumatoid arthritis in DBA/IJ mice immunized with type II collagen. After the induction of arthritis, the mice were being divided into five groups: (1) normal, no immunization; (2) CIA, collagen-induced arthritis; (3) MTX, collagen-induced arthritis treated with methotrexate (0.3 mg/kg body weight); (4) CC, collagen-induced arthritis treated with Caciocavallo cheese (0.6 g/d); (5) NPCC, collagen-induced arthritis treated with nanopowdered peanut sprout-added Caciocavallo cheese (0.6 g/d). Nanopowdered peanut sprout was ranged from 300 to 350 nm, while regular powdered peanut sprouts were ranged from 50 to 150 μm. The NPCC group had considerable reductions of clinical scores and paw thicknesses at the end of experiment as compared to the CIA group. In the serum analysis, the TNF-α, IL-1β, IL- 6 and IgG1 levels in the NPCC group have decreased by 69.4, 75.9, 66.6, and 61.9%, respectively, when compared to the CIA group. The histological score and spleen index of the NPCC group were significantly lower than the CIA group. In conclusion, the feeding NPCC method could delay and/or prevent the rheumatoid arthritis in the collagen-induced arthritis mouse model. Based on this study, nanopowdered peanut sprouts could be applied to various functional cheeses. | |
23032984 | T-cell non-Hodgkin's lymphomas reported to the FDA AERS with tumor necrosis factor-alpha ( | 2013 Jan | OBJECTIVES: The risk of non-Hodgkin's lymphoma (NHL) with tumor necrosis factor alpha (TNF-α) inhibitors is unclear, whether related to concomitant thiopurines usage or due to the underlying inflammatory disease. We sought to review all cases of T-cell NHL reported to the Food and Drug Administration (FDA) in patients receiving TNF-α inhibitors for all approved indications and examine the risk of T-cell NHL with TNF-α inhibitors in comparison with the use of thiopurines in inflammatory bowel disease (IBD). METHODS: The FDA Adverse Event Reporting System (AERS) was queried for all lymphomas following treatment with the following TNF-α inhibitors: infliximab, adalimumab, certolizumab, etanercept, and their trade names. Full reports for T-cell NHL cases were identified using the Freedom of Information Act. In addition, T-cell NHL reported in patients IBD with the use of the thiopurines-azathioprine, 6-mercaptopurine, and their trade names were also collected. A search of MEDLINE was performed for additional T-cell NHL with TNF-α inhibitors or thiopurines, not reported to the FDA but available in published literature. The histological subtypes of T-cell NHL reported with TNF-α inhibitors were compared with reported subtypes in Surveillance Epidemiology and End Results (SEER) -17 registry. Reported risk of T-cell NHL in IBD with TNF-α inhibitors, thiopurines, or concomitant use was calculated using Fisher's exact test using 5-aminosalicylates as control drugs. RESULTS: A total of 3,130,267 reports were downloaded from the FDA AERS (2003-2010). Ninety-one cases of T-cell NHL with TNF-α inhibitors were identified in the FDA AERS and nine additional cases were identified on MEDLINE search. A total of 38 patients had rheumatoid arthritis, 36 cases had Crohn's disease, 11 had psoriasis, 9 had ulcerative colitis, and 6 had ankylosing spondylitis. Sixty-eight of the cases (68%) involved exposure to both a TNF-α inhibitor and an immunomodulator (azathioprine, 6-mercaptopurine, methotrexate, leflunomide, or cyclosporine). Hepatosplenic T-cell lymphoma (HSTCL) was the most common reported subtype, whereas mycosis fungoides/Sezary syndrome and HSTCL were identified as more common with TNF-α-inhibitor exposure compared with SEER-17 registry. Nineteen cases of T-cell NHL with thiopurines were identified in the FDA AERS and one additional case on MEDLINE. Reported risk of T-cell NHL was higher with TNF-α inhibitor use in combination with thiopurines (95% confidence interval (CI) 4.98-354.09; P<0.0001) and thiopurines alone (95% CI 8.32-945.38; P<0.0001) but not with TNF-α inhibitor use alone (95% CI 0.13-10.61; P=1.00). CONCLUSIONS: Risk of T-cell NHL is increased with TNF-α inhibitor use in combination with thiopurines but not with TNF-α inhibitors alone. | |
27708901 | Combined infliximab and methotrexate treatment improves the depressive state in rheumatoid | 2014 Dec | OBJECTIVE: Rheumatoid arthritis (RA) patients have a greater depressive tendency than normal subjects, and infliximab is known to provide quick therapeutic effects and to have high bioavailability for RA. We therefore investigated whether the depressive state of RA patients would be improved by infliximab. MATERIAL AND METHODS: The Self-Rating Depression Scale (SDS) was used to evaluate 34 RA patients before and 14 or 30 weeks after inflixi mab treatment using the SDS and Disease Activity Score (DAS) 28. The SDS and DAS28 results before and after treatment were compared. RESULTS: We also included 42 cases treated with methotrexate as the control group. The SDS decreased in both groups, and the intraindividual vari ability was p<0.001, indicating that the drugs had significantly different effects on the SDS. The DAS tended to decrease in both groups, but the intraindividual variability was p=0.199, indicating no difference between the two drugs. CONCLUSION: This study is a preliminary study, but the data suggest that infliximab may reduce RA disease activity and improve the depressive state. | |
24348319 | Life-Threatening Gastrointestinal Mucosal Necrosis during Methotrexate Treatment for Rheum | 2013 | Methotrexate (MTX), a folic acid antagonist, is widely used in the treatment of neoplasms, psoriasis and rheumatoid arthritis. Despite its efficacy, MTX sometimes finds limited application because of its adverse effects, including renal or liver impairment, bone marrow toxicity and gastrointestinal mucosal injury. Intestinal mucositis, bleeding and peptic ulcers are well-known gastrointestinal adverse effects of MTX, although cases of fatal mucosal necrosis induced by MTX are extremely rare. Here, we report the case of an 82-year-old Japanese woman who developed severe gastrointestinal mucosal necrosis after 8 years of treatment with low-dose MTX (8 mg/week). In the drug lymphocyte stimulation test, MTX showed a strong positive reaction, with a stimulation index of 443% against normal controls. Physicians must be aware of potential drug-induced adverse effects in patients with chronic diseases who are on long-term medication. |