background: no consensus has been reached on prognostic value of serum concentration of β (beta) subunit of human chorionic gonadotropin (β-hcg) in treatment response to methotrexate in management of ectopic pregnancy. therefore, the present study aimed to evaluate this subject through a systematic review and meta-analysis. materials and methods: an extensive literature search on online databas...

A new fluorescent methotrexate analogue (PT430) was synthesized as a reported ligand for dihydrofolate reductase. The analogue was prepared by attachment of lysine in place of the glutamate side chain of methotrexate and conjugation to fluorescein isothiocyanate via the epsilon-amino group of lysine. Spectrophotometric enzyme inhibition assays showed PT430 to be about one-tenth as potent as met...

Background: Methotrexate is used in the treatment of Low-risk Gestational Trophoblastic Neoplasia. The purpose of this study was to compare the therapeutic responses and side effects of two therapeutic methods which were prescribed for patients suffering from Low-risk Gestational Trophoblastic Neoplasia. One method was the daily use of Methotrexate-Folic Acid (for 8 da...

BACKGROUND Methotrexate is a chemotherapeutic agent used to treat a variety of cancers. However, the occurrence of resistance limits its effectiveness. Cytochrome c in its reduced state is less capable of triggering the apoptotic cascade. Thus, we set up to study the relationship among redox state of cytochrome c, apoptosis and the development of resistance to methotrexate in MCF7 human breast ...

OBJECTIVE To identify the proportion of patients with inflammatory arthritis who remain on methotrexate in the medium to long term and the incidence of side-effects in clinical practice. METHOD The study population comprised all patients with inflammatory arthritis treated with methotrexate and monitored in clinics under the auspices of Staffordshire Rheumatology Centre. Two clinical auditors...

Methotrexate accumulation, subcellular distribution, metabolism, and cytotoxicity were studied in human epidermoid carcinoma (KB) cells that were exposed to a low extracellular concentration of methotrexate (25 nM) following culture in widely differing concentrations of folic acid. KB cells cultured in standard medium with a high folic acid concentration (2.3 microM) had high levels of cellular...

OBJECTIVE Methotrexate has a well-recognized side-effect of acute hypersensitivity pneumonitis. There is concern about whether chronic pulmonary toxicity can occur with methotrexate treatment. Our objective was to compare chest high-resolution computed tomography (HRCT) findings and serial pulmonary function tests in rheumatoid arthritis (RA) patients on methotrexate with findings for a control...

OBJECTIVE To determine the effect of changing from etanercept or methotrexate monotherapy to etanercept plus methotrexate combination therapy on radiographic progression in rheumatoid arthritis (RA) patients. METHODS Patients enrolled in this 1-year open-label study previously completed a 3-year blinded study in which they received methotrexate or etanercept monotherapy or the combination of ...

Background: No consensus has been reached on prognostic value of serum concentration of β (beta) subunit of human chorionic gonadotropin (β-hCG) in treatment response to methotrexate in management of ectopic pregnancy. Therefore, the present study aimed to evaluate this subject through a systematic review and meta-analysis. Materials and Methods: An extensive literature search on online databas...

BACKGROUND Methotrexate is the most frequent choice of disease-modifying antirheumatic therapy for rheumatoid arthritis. Although results of studies have shown the efficacy of such drugs, including methotrexate, on rheumatoid arthritis morbidity measures, their effect on mortality in patients with the disease remains unknown. Our aim was to prospectively assess the effect on mortality of methot...