Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 10 de 10
Filtrar
Más filtros










Base de datos
Intervalo de año de publicación
1.
J Med Educ Curric Dev ; 9: 23821205221098470, 2022.
Artículo en Inglés | MEDLINE | ID: mdl-35529177

RESUMEN

Problem: Epidemiological data throughout the academic world show an upswing in mental health concerns among students, even more significant during the ongoing COVID-pandemic. Many universities have recognized these problems and started counseling programs. However, currently reported stress levels and mental health problems at many universities remain substantial. Approach: Our medical faculty features an evidence informed longitudinal program on personal-professional development (LPPD) integrated into the core curriculum to strengthen wellbeing and support the student as a whole. Outcomes: With our LPPD program we show that it is possible to successfully enable personal-professional development and well-being, especially in unexpected times when resilience is needed. The safe learning environment the teacher-coaches created has proven to be an important condition in this regard. Next steps: The LPPD program will be further evaluated and both results and program materials will be shared with the academic community through web-pages, online material and research papers.

2.
Ann Rheum Dis ; 62(5): 423-6, 2003 May.
Artículo en Inglés | MEDLINE | ID: mdl-12695153

RESUMEN

OBJECTIVE: To study factors associated with toxicity, final dose, and efficacy of methotrexate (MTX) in patients with rheumatoid arthritis (RA). METHODS: Data were used from a randomised clinical 48 week trial on 411 patients with RA all treated with MTX, comparing folates and placebo. Logistic regression was used to study the relation between baseline variables and various dependent factors, including hepatotoxicity (alanine aminotransferase >/=3 x upper limit of normal), MTX withdrawal, final MTX dose >/=15 mg/week, and MTX efficacy. RESULTS: Addition of folates to MTX treatment was strongly related to the lack of hepatotoxicity. Next to this, high body mass index was related to the occurrence of hepatotoxicity. Prior gastrointestinal (GI) events and younger age were related to the adverse event, diarrhoea. Hepatotoxicity and GI adverse events were the main reason for MTX withdrawal, which in turn was associated with the absence of folate supplementation, body mass index, prior GI events, and female sex. Renal function (creatinine clearance >/=50 ml/min) was not associated with toxicity. Reaching a final dose of MTX of >/=15 mg/week was related to folate supplementation and the absence of prior GI events. Efficacy of MTX treatment was associated with low disease activity at baseline, male sex, use of non-steroidal anti-inflammatory drugs (NSAIDs), and lower creatinine clearance. CONCLUSIONS: MTX toxicity, final dose, and efficacy are influenced by folate supplementation. Baseline characteristics predicting the outcome of MTX treatment are mainly prior GI events, body mass index, sex, use of NSAIDs, and creatinine clearance.


Asunto(s)
Antirreumáticos/efectos adversos , Artritis Reumatoide/tratamiento farmacológico , Metotrexato/efectos adversos , Adulto , Factores de Edad , Anciano , Antirreumáticos/administración & dosificación , Artritis Reumatoide/fisiopatología , Índice de Masa Corporal , Enfermedad Hepática Inducida por Sustancias y Drogas , Creatinina/farmacocinética , Sistema Digestivo/fisiopatología , Relación Dosis-Respuesta a Droga , Femenino , Ácido Fólico/administración & dosificación , Humanos , Masculino , Metotrexato/administración & dosificación , Persona de Mediana Edad , Índice de Severidad de la Enfermedad , Factores Sexuales , Resultado del Tratamiento
3.
Ann Rheum Dis ; 61(12): 1060-4, 2002 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-12429535

RESUMEN

OBJECTIVES: To study (a) purine metabolism during treatment with methotrexate (MTX) in patients with rheumatoid arthritis (RA) and (b) the relation of purine metabolism with efficacy and toxicity of MTX treatment. METHODS: One hundred and three patients with active RA who started treatment with MTX were included. The initial MTX dosage was 7.5 mg/week and raised to a maximum of 25 mg weekly if necessary. The purine enzymes 5'-nucleotidase (5'NT), purine-nucleoside-phosphorylase (PNP), hypoxanthine-guanine-phosphoribosyltransferase (HGPRT), and adenosine-deaminase (ADA) were measured before the start, after six weeks, and after 48 weeks or at study withdrawal. The laboratory results were related to measures of efficacy and toxicity of MTX treatment. RESULTS: Baseline values of 5'NT and PNP (16.9 and 206.8 nmol/10(6) mononuclear cells/h, respectively) were similar to those in former studies. Activities of HGPRT and ADA were relatively low at the start (8.7 and 80.3 nmol/10(6) mononuclear cells/h, respectively). After six weeks purine enzyme activities showed no important changes from baseline. After 48 weeks of MTX treatment a decrease of the enzyme activities of ADA (-21.6 nmol/10(6) mononuclear cells/h; 95% CI -28.6 to -14.7), PNP (-78.9 nmol/10(6) mononuclear cells/h; 95% CI -109.0 to -48.7), and HGPRT (-2.0 nmol/10(6) mononuclear cells/h; 95% CI -3.1 to -0.9) was found. No association was shown between the enzyme activities of ADA, PNP, and HGPRT, and the efficacy or toxicity of MTX treatment. In contrast, enzyme activity of 5'NT showed a decrease in the subgroup of patients discontinuing MTX treatment because of hepatotoxicity. CONCLUSION: MTX treatment in patients with RA leads to a significant decrease of the purine enzyme activities of ADA, PNP, and HGPRT that is not related to the anti-inflammatory efficacy or toxicity of MTX. Hepatotoxicity was related to a decrease in the enzyme activity of 5'NT. These changes may be explained by direct or indirect (via purine de novo and salvage metabolism and the homocysteine pathway) effects of MTX.


Asunto(s)
Antirreumáticos/uso terapéutico , Artritis Reumatoide/tratamiento farmacológico , Artritis Reumatoide/enzimología , Metotrexato/uso terapéutico , Purinas/metabolismo , Adenosina Desaminasa/efectos de los fármacos , Adenosina Desaminasa/metabolismo , Adulto , Anciano , Antirreumáticos/efectos adversos , Sedimentación Sanguínea , Femenino , Ácido Fólico/uso terapéutico , Humanos , Hipoxantina Fosforribosiltransferasa/efectos de los fármacos , Hipoxantina Fosforribosiltransferasa/metabolismo , Leucovorina/uso terapéutico , Masculino , Metotrexato/efectos adversos , Persona de Mediana Edad , Nucleotidasas/efectos de los fármacos , Nucleotidasas/metabolismo , Purina-Nucleósido Fosforilasa/efectos de los fármacos , Purina-Nucleósido Fosforilasa/metabolismo , Análisis de Regresión
4.
Rheumatology (Oxford) ; 41(6): 658-65, 2002 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-12048292

RESUMEN

OBJECTIVE: To study (i) the influence of methotrexate (MTX) therapy on homocysteine and folate metabolism in patients with rheumatoid arthritis (RA), (ii) the influence of the C677T mutation in the methylenetetrahydrofolate reductase gene (MTHFR) on the change in plasma homocysteine levels during MTX treatment, and (iii) the interference of folate and homocysteine metabolism with the efficacy and toxicity of treatment with MTX. METHODS: The 113 patients enrolled in this study were participating in a 48-week, multicentre, double-blind, placebo-controlled study comparing the efficacy and toxicity of MTX treatment with and without folic or folinic acid supplementation. The MTX dose was 7.5 mg/week initially and increased to a maximum of 25 mg/week if necessary. Concentrations of total folate, 5-methyl tetrahydrofolate (in serum and in erythrocytes) and of homocysteine, cysteine and cysteine-glycine and the MTHFR genotype were determined before the start of the study, after 6 weeks, and after 48 weeks or on withdrawal from the study. Blood was drawn from fasting patients at a standardized time in the morning, 16 h after intake of MTX. The laboratory results were related to parameters of efficacy and toxicity of MTX treatment. RESULTS: Baseline values were distributed equally in the three treatment groups. The mean plasma homocysteine level (normal range 6-15 micromol/l) before the start of MTX was relatively high in all groups: 15.4 micromol/l [95% confidence interval (CI) 13.5 to 17.2] in the MTX plus placebo group (n=39), 14.3 micromol/l (95% CI 12.2 to 16.4) in the MTX plus folic acid group (n=35) and 15.9 micromol/l (95% CI 13.7 to 18.1) in the MTX plus folinic acid group (n=39). After 48 weeks of MTX therapy, the mean homocysteine level showed an increase in the placebo group (+3.6 micromol/l, 95% CI 1.7 to 5.6). In contrast, a decrease was observed in the groups supplemented with folic or folinic acid (folic acid, -2.7 micromol/l, 95% CI -1.4 to -4.0; folinic acid, -1.6 micromol/l, 95% CI -0.1 to -3.0). The differences in the change in plasma homocysteine level between the placebo group and each of the two folate-supplemented groups were statistically significant (P<0.0001), contrary to the difference between the folic and folinic acid groups (P=0.26). Linear regression analysis showed that the change in plasma homocysteine level was statistically significantly associated with folic or folinic acid supplementation (P=0.0001) but not with the presence or absence of the C677T mutation in the MTHFR gene. Homozygous mutants had a higher plasma homocysteine concentration at baseline. No relationship was found between the change in disease activity and the change in homocysteine concentration or the mean homocysteine concentration after 48 weeks of MTX therapy. Toxicity-related discontinuation of MTX treatment was not associated with the change in homocysteine concentration. CONCLUSIONS: Low-dose MTX treatment in RA patients leads to an increased plasma homocysteine level. Concomitant folate supplementation with either folic or folinic acid decreases the plasma homocysteine level and consequently protects against potential cardiovascular risks. No relationship was found between the change in homocysteine concentration and the presence or absence of the C677T mutation in the MTHFR gene. Homocysteine metabolism was not associated with efficacy or toxicity of MTX treatment.


Asunto(s)
Antirreumáticos/administración & dosificación , Artritis Reumatoide/tratamiento farmacológico , Daunorrubicina/análogos & derivados , Ácido Fólico/sangre , Homocisteína/sangre , Metotrexato/administración & dosificación , Adulto , Anciano , Antirreumáticos/efectos adversos , Artritis Reumatoide/sangre , Artritis Reumatoide/genética , Femenino , Genotipo , Humanos , Leucovorina/sangre , Modelos Lineales , Masculino , Metotrexato/efectos adversos , Metilenotetrahidrofolato Reductasa (NADPH2) , Persona de Mediana Edad , Oxidorreductasas actuantes sobre Donantes de Grupo CH-NH/genética , Mutación Puntual
5.
Rheumatology (Oxford) ; 41(4): 430-9, 2002 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-11961174

RESUMEN

OBJECTIVES: To compare the 48-week drug survival, efficacy and toxicity of monotherapy with a fully human anti-tumour necrosis factor-alpha (TNF-alpha) monoclonal antibody (moAb) and methotrexate (MTX) in patients with active long-standing rheumatoid arthritis (RA). Secondary aims were to identify potential predictors for clinical response. METHODS: Patients with RA, enrolled in phase I trials with a human anti-TNF-alpha moAb and followed for at least 48 weeks at our centre, were compared with patients receiving MTX monotherapy without folate supplementation. The first 6 weeks of anti-TNF therapy were placebo-controlled and followed by an open-label study. Patients treated with MTX participated in a 48-week, double-blind, phase III study of MTX alone vs MTX with folate supplementation, which was co-ordinated by our department. The studies with anti-TNF-alpha and MTX were performed in the same period and had very similar inclusion, exclusion, response and stop criteria. RESULTS: Sixty-one patients treated with anti-TNF-alpha moAb were compared with 137 receiving MTX monotherapy. At baseline, patients in the anti-TNF-alpha group had a longer disease duration (median 108 vs 50 months, P=0.0001) and a more protracted history of second-line anti-rheumatic drugs than those treated with MTX (median 4 vs 1, P=0.0001). The 48-week dropout rate was lower among patients treated with anti-TNF (23 vs 45% in the MTX group, P<0.005). Proportional hazard analysis showed a significantly lower dropout risk among anti-TNF-treated patients [relative risk (95% confidence interval): 0.28 (0.12-0.6) uncorrected and 0.17 (0.06-0.45) corrected for confounders). The 48-week area under the curve for the disease activity score (DAS) was smaller in the anti-TNF-alpha group than in the MTX group (P=0.005). The percentage of responders was higher in the anti-TNF-alpha group over the whole study period. The median percentage of visits in which a patient fulfilled the European League Against Rheumatism (EULAR) response criteria was 83% in the anti-TNF-alpha group vs 40% in the MTX group (P=0.0001). Clinical and demographic characteristics were, in general, poor predictors for response to therapy at week 48. The clinical response after the first anti-TNF-alpha dose tended to increase the chance of prolonged efficacy of this approach [relative risk (95% confidence interval): 2 (0.75-6.0)]. The previous number of second-line drugs was the only predictive variable for response to MTX to which it was inversely related [relative risk (95% confidence interval): -0.71 (-0.57 to -0.88)]. CONCLUSIONS: In patients with active, long-standing RA, blocking TNF-alpha is more effective and better tolerated than MTX monotherapy. An early response increases the chance of a sustained effect of anti-TNF-alpha. In contrast to MTX, the response to anti-TNF-alpha is not affected by previous disease-modifying anti-rheumatic drug history.


Asunto(s)
Anticuerpos Monoclonales/uso terapéutico , Antirreumáticos/uso terapéutico , Artritis Reumatoide/tratamiento farmacológico , Metotrexato/uso terapéutico , Pacientes Desistentes del Tratamiento , Factor de Necrosis Tumoral alfa/inmunología , Área Bajo la Curva , Artritis Reumatoide/inmunología , Artritis Reumatoide/fisiopatología , Relación Dosis-Respuesta a Droga , Método Doble Ciego , Femenino , Humanos , Masculino , Valor Predictivo de las Pruebas , Modelos de Riesgos Proporcionales , Índice de Severidad de la Enfermedad , Resultado del Tratamiento , Factor de Necrosis Tumoral alfa/antagonistas & inhibidores
6.
Arthritis Rheum ; 44(11): 2525-30, 2001 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-11710708

RESUMEN

OBJECTIVE: To study the possible relationship between the C677T mutation in the methylenetetrahydrofolate reductase (MTHFR) gene and the toxicity and efficacy of treatment with methotrexate (MTX) in patients with rheumatoid arthritis (RA). METHODS: Genotype analysis of the MTHFR gene was done in 236 patients who started MTX treatment with (n = 157) or without (n = 79) folic or folinic acid supplementation. Outcomes were parameters of efficacy of MTX treatment, patient withdrawal due to adverse events, discontinuation of MTX treatment because of elevated liver enzyme levels, and the total occurrence of elevated liver enzyme levels during the study. Multivariate logistic regression analysis was used to study the relationship between the presence of the MTHFR C677T mutation and toxicity outcomes of MTX treatment. RESULTS: Forty-eight percent of the patients showed the homozygous (T/T) or heterozygous (T/C) mutation. The presence of the C677CT or C677TT genotypes was associated with an increased risk of discontinuing MTX treatment because of adverse events (relative risk 2.01; 95% confidence interval 1.09, 3.70), mainly due to an increased risk of elevated liver enzyme levels (relative risk 2.38; 95% confidence interval 1.06, 5.34). Efficacy parameters were not significantly different between the patients with and those without the mutation. CONCLUSION: The C677T mutation is the first identified genetic risk factor for elevated alanine aminotransferase values during MTX treatment in patients with RA. We postulate that the incidence of clinically important elevation of liver enzyme levels during MTX treatment is mediated by homocysteine metabolism. Supplementation with folic or folinic acid reduced the risk of toxicity-related discontinuation of MTX treatment both in patients with and in patients without the mutation.


Asunto(s)
Antirreumáticos/efectos adversos , Artritis Reumatoide/genética , Predisposición Genética a la Enfermedad , Metotrexato/efectos adversos , Oxidorreductasas actuantes sobre Donantes de Grupo CH-NH/genética , Mutación Puntual , Alanina Transaminasa/metabolismo , Artritis Reumatoide/tratamiento farmacológico , Artritis Reumatoide/enzimología , Artritis Reumatoide/fisiopatología , Método Doble Ciego , Femenino , Ácido Fólico/administración & dosificación , Genotipo , Hematínicos/administración & dosificación , Humanos , Hígado/efectos de los fármacos , Hígado/enzimología , Masculino , Metotrexato/administración & dosificación , Metilenotetrahidrofolato Reductasa (NADPH2) , Persona de Mediana Edad , Oxidorreductasas actuantes sobre Donantes de Grupo CH-NH/metabolismo , Índice de Severidad de la Enfermedad , Resultado del Tratamiento
7.
Arthritis Rheum ; 44(7): 1515-24, 2001 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-11465701

RESUMEN

OBJECTIVE: To study the effect of folates on discontinuation of methotrexate (MTX) as single-drug antirheumatic treatment due to toxicity, to determine which type of adverse events are reduced, to study the effects on the efficacy of MTX, and to compare folic with folinic acid supplementation in a 48-week, randomized, double-blind, placebo-controlled trial. METHODS: Patients with active RA (n = 434) were randomly assigned to receive MTX plus either placebo, folic acid (1 mg/day), or folinic acid (2.5 mg/week). The initial MTX dosage was 7.5 mg/week; dosage increases were allowed up to a maximum of 25 mg/week for insufficient responses. Folate dosages were doubled once the dosage of MTX reached 15 mg/week. The primary end point was MTX withdrawal because of adverse events. Secondary end points were the MTX dosage and parameters of efficacy and toxicity of MTX. RESULTS: Toxicity-related discontinuation of MTX occurred in 38% of the placebo group, 17% of the folic acid group, and 12% of the folinic acid group. These between-group differences were explained by a decreased incidence of elevated liver enzyme levels in the folate supplementation groups. No between-group differences were found in the frequency of other adverse events or in the duration of adverse events. Parameters of disease activity improved equally in all groups. Mean dosages of MTX at the end of the study were lower in the placebo group (14.5 mg/week) than in the folic and folinic acid groups (18.0 and 16.4 mg/week, respectively). CONCLUSION: Both folate supplementation regimens reduced the incidence of elevated liver enzyme levels during MTX therapy, and as a consequence, MTX was discontinued less frequently in these patients. Folates seem to have no effect on the incidence, severity, and duration of other adverse events, including gastrointestinal and mucosal side effects. Slightly higher dosages of MTX were prescribed to obtain similar improvement in disease activity in the folate supplementation groups.


Asunto(s)
Antirreumáticos/toxicidad , Artritis Reumatoide/tratamiento farmacológico , Ácido Fólico/administración & dosificación , Hematínicos/administración & dosificación , Leucovorina/administración & dosificación , Metotrexato/toxicidad , Adulto , Anciano , Antirreumáticos/administración & dosificación , Método Doble Ciego , Femenino , Humanos , Masculino , Metotrexato/administración & dosificación , Persona de Mediana Edad , Placebos , Estudios Prospectivos , Resultado del Tratamiento
8.
Semin Arthritis Rheum ; 27(5): 277-92, 1998 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-9572710

RESUMEN

OBJECTIVES: To provide an update of the current knowledge of the mechanism of action of low-dose methotrexate (MTX) in the treatment of patients with rheumatoid arthritis (RA), with an emphasis on the mechanisms involved in toxicity. We also considered strategies currently used to prevent or decrease toxicity of MTX. METHODS: We reviewed the literature dealing with the subjects of MTX treatment of RA, the mechanisms of action of low-dose MTX regarding efficacy and toxicity, and strategies used to prevent or decrease MTX toxicity. RESULTS: MTX is a fast working and effective second-line antirheumatic agent (SLA). Its use is limited mainly because of side effects. The mechanisms of action regarding efficacy and toxicity are probably determined by different metabolic pathways. Recent data indicate that the antiinflammatory effect of MTX is mediated by adenosine. However, MTX side effects can only partly be explained by folate antagonism and may also depend on its action on other related metabolic pathways. The latter include the homocysteine-methionine-polyamine pathway and purine metabolism. Variants in these metabolic routes (ie, the C677T mutation in the methylene-tetrahydrofolate reductase [MTHFR] gene), may predispose to the development of side effects. Currently the most promising strategy to decrease or prevent toxicity of MTX is concomitant prescription of folic acid or folinic acid. Other strategies are currently under investigation. CONCLUSIONS: MTX benefits a majority of RA patients. Approximately 30% of patients, however, abandon treatment because of drug-related side effects. Folic acid or folinic acid likely reduces MTX toxicity. More data, however, are needed to evaluate a potential detrimental effect on the antirheumatic efficacy of MTX.


Asunto(s)
Antirreumáticos/farmacología , Artritis Reumatoide/tratamiento farmacológico , Antagonistas del Ácido Fólico/farmacología , Metotrexato/farmacología , Antirreumáticos/efectos adversos , Artritis Reumatoide/metabolismo , Ácido Fólico/metabolismo , Antagonistas del Ácido Fólico/efectos adversos , Humanos , Metotrexato/efectos adversos
9.
Ned Tijdschr Geneeskd ; 138(39): 1963-6, 1994 Sep 24.
Artículo en Holandés | MEDLINE | ID: mdl-7935947

RESUMEN

In a 71-year-old woman suffering from recurrent fever, dry cough, pain during sighing, hoarseness and later severe inflammation of the cartilage of both auricles 'relapsing polychondritis' was diagnosed. This is a rare disease of cartilage and connective tissue. Most frequent symptoms are inflammation of the auricles and nasal septum, joint disorders and inflammation of eye structures, larynx and trachea. The aetiology may be autoimmunity. The clinical diagnosis can be confirmed by a cartilage biopsy. The disease is recurrent and causes substantial morbidity and mortality. Therapy consists of NSAIDs, steroids, and sometimes immunosuppressive agents.


Asunto(s)
Policondritis Recurrente/diagnóstico , Anciano , Quimioterapia Combinada , Femenino , Humanos , Naproxeno/administración & dosificación , Naproxeno/uso terapéutico , Policondritis Recurrente/tratamiento farmacológico , Prednisona/administración & dosificación , Prednisona/uso terapéutico
10.
Infection ; 22(2): 102-5, 1994.
Artículo en Inglés | MEDLINE | ID: mdl-8070920

RESUMEN

Pneumopericardium, the presence of air in the pericardial space, is a rare disorder that is usually caused by trauma. We describe a patient given induction chemotherapy for acute myelogenous leukemia who developed pulmonary aspergillosis that resulted in pericarditis and pneumopericardium. He responded to antifungal treatment and recovered from granulocytopenia, but died early during the next course of chemotherapy. Two other reported cases of pneumopericardium associated with pulmonary aspergillosis are summarized.


Asunto(s)
Agranulocitosis/complicaciones , Aspergilosis/complicaciones , Leucemia Promielocítica Aguda/complicaciones , Enfermedades Pulmonares Fúngicas/complicaciones , Pericarditis/etiología , Neumopericardio/etiología , Adulto , Aspergilosis/tratamiento farmacológico , Resultado Fatal , Humanos , Leucemia Promielocítica Aguda/tratamiento farmacológico , Enfermedades Pulmonares Fúngicas/tratamiento farmacológico , Masculino , Pericarditis/diagnóstico por imagen , Neumopericardio/diagnóstico por imagen , Radiografía
SELECCIÓN DE REFERENCIAS
DETALLE DE LA BÚSQUEDA
...