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A prospective, open-label study evaluating the efficacy of montelukast, 10 mg or 20 mg, in the prophylaxis of migraine in 17 patients is presented in this paper. All 17 patients completed the study that consisted of a 2-month baseline run-in period and a 3-month treatment phase.
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We studied the effect of treatment with an oral antagonist of cysteinyl leukotriene receptors on the increased expression of the low-affinity IgE receptor, CD23, on B cells, and of its ligands, CD11b and CD11c, on CD4(+) T cells and monocytes in peripheral blood of patients with allergic asthma. In this uncontrolled open-label study, 14 children with allergic asthma received montelukast, a cysteinyl leukotrine receptor antagonist, for a period of 6 weeks after demonstrating forced expiratory volume in 1 s (FEV(1)) of less than 80% of the predicted value. Samples of peripheral heparinized blood and sera were obtained before and after therapy completion. Three-colour immunofluorescence analysis was performed, and expression of CD11b and CD11c on CD4(+) T lymphocytes and monocytes as well as the expression of CD21 and CD23 on B cells were determined (n=12). Peripheral blood eosinophil count, changes in FEV(1) and peak expiratory flow rate (PEFR), asthma exacerbations, and as-needed use of beta-agonist were also monitored.
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Children with asthma were randomly divided into control group and treatment group. The control group was given Montelukast Sodium tablets for 4 mg (2-5 years old) or 5 mg (6-14 years old), once every night before sleeping. At the same time, the treatment group was given Pingchuan water decoction additionally for one tie per day, in four to six-divided doses for eight weeks. On the other hand, groups of health children were selected as blank control. Before and after treatment, the level of IL-4, IL-13 and IFN-gamma were detected by elisa from 3 mL of venous blood.
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The study population consisted of 75,140 children (mean [SD] age, 10.6 [4.0] years) and 226,236 adults (mean age, 43.8 [11.8] years). Slightly more than half (52.4%) of the pediatric population was male compared with 44.7% of the adult population. Fifty percent of patients had no pharmacy fills for an AR medication in 2006. Among patients with AR pharmacy fills (n = 150,751), 78.1% had a single index medication fill (montelukast represented 4.5%) and 21.9% were prescribed multiple index medications. Children with AR were more likely to fill a prescription for montelukast (n = 7513) if they were 4 to 11 years of age; male; diagnosed with cough/wheeze; and had 1 or 2 oral corticosteroid fills, >or=3 antibiotic fills, and AR-related physician office visits in the prior 12 months (all, P < 0.001). Prescription fills for montelukast among adult patients with AR were significantly (P < 0.001) associated with other respiratory/atopic conditions; prior fills for antihistamines, oral corticosteroids, or intranasal corticosteroids; and AR-related physician office visits in the prior 12 months. Children and adults with health plans based in the midwestern or southern region of the United States had greater odds of initiating montelukast than those with plans based in the western region (P < 0.001).
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Combined topical steroid and combined mediator antagonism both attenuated systemic inflammation in the unified allergic airway, but only the former reduced bronchial and nasal inflammatory markers. The relevance of this to exacerbations and airway remodelling needs to be defined.
The incidence of asthma has been positively associated with obesity. Asthma comprises diverse "phenotypes" reflecting heterogeneity in a number of characteristics, including response to therapy. The present authors examined whether body mass index (BMI) influenced the response to placebo, as well as to two asthma controller medications. A post hoc analysis was performed, pooling data from four double-blind, placebo-controlled studies randomising 3,073 moderate asthmatic adults to montelukast (n=1,439), beclomethasone (n=894) or placebo (n=740). The primary end point was asthma control days; other end points were forced expiratory volume in one second, beta-agonist use and nocturnal awakening. Analyses were conducted using BMI classification into normal (<25.0 kg.m-2; 52% of patients), overweight (25-29.9 kg.m-2; 32%) and obese (>or=30.0 kg.m-2; 16%) categories, as well as BMI as a continuous variable. The treatment groups were balanced for BMI, demographic characteristics and parameters of asthma control. The placebo response for all end points was generally lower with increasing BMI. Similarly, the response to the inhaled corticosteroid decreased, whereas the response to the leukotriene antagonist remained stable. In conclusion, post hoc data from the present study suggested that body mass index may influence the natural history of asthma control (as reflected by response to placebo) and may differentially influence response to the two active agents, warranting explicit testing in future prospective studies.
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Ischemia-reperfusion (I/R) event in vascular and nervous system has been documented to rising ischemic and vasculitic neuropathic pain, clinically resembles the complex regional pain syndrome (CRPS). The present study evaluated the effect of montelukast, a cysteinyl leukotriene receptor (Cys-LTC(4) and Cys-LTD(4)) antagonist on ischemia -reperfusion (I/R) induced vasculitic neuropathic pain in rats.
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We tested the influence of magnesium, zinc and copper upon the montelukast (MK, antagonist of cysteinyl leukotriene receptor type 1) effect in experimentally-induced thermoalgesia. We worked on 5 groups of 10 adults, each Wistar rats, that received: group I-control; group II: MK (10 mg/kg) unique administration; group III: MgCl2 (1 mM/kg/day) i.p., 3 days and MK (10 mg/kg) unique administration on the 3rd day; group IV: ZnCl2, (0.1 mM/kg/day), i.p., 3 days and MK (10 mg/kg) unique administration on the 3rd day; group V: copper acetate (0.05 mM/kg/day), i.p., 3 days and MK (10 mg/kg) unique administration on the 3rd day. We determined the thermoalgesic sensitivity (TS) using a tail flick analgesia meter, initially, 3 days after daily cation administration and 3 hours after MK administration. Our data show that MK has a statistically significant reduction of TS vs control group (3.76 +/- 1.04 s vs 1.81 +/- 0.98 s, p < 0.05). Copper and magnesium administration do not significantly change the MK effect to decrease TS. The co-administration of zinc and MK statistically significantly increased the TS of the group that received only MK (2.51 +/- 0.21 s vs 3.76 +/- 1.04 s, p < 0.05). Animals that received only cations (in the above mentioned doses) did not significantly change TS.
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A study was undertaken to determine whether montelukast, a new potent cysteinyl leukotriene receptor antagonist, attenuates exercise-induced bronchoconstriction. The relationship between the urinary excretion of LTE4 and exercise-induced bronchoconstriction was also investigated.
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(1) LTD4S gene-444 genotype AA/CC, AC/CC frequency is 70.7% (106/150) and 29.3% (44/150), allele A, C frequencies is 67.3% (101/150) and 32.7% (49/150) in AR group, and LTD4S gene-444 genotype AA/CC, AC/CC frequency is 76.7% (112/146) and 23.3% (34/ 146), allele A, C frequencies is 74.0% (108/146) and 26.0% (38/146) in healthy control group, there is not statistically significant difference between two groups. (2) Among 150 AR patients, compared to patients with AA/CC genotype, the genotype AC/CC patients are younger [average age (35 +/- 9), and (50 +/- 18) respectively, F = 5.891, P < 0.05], with earlier age of onset [(31 +/- 4), and (46 +/- 6) respectively, F = 6.985, P < 0.05], longer course of disease [(8.7 +/- 2.1), and (3.1 +/- 2.0) respectively, F = 11.43, P < 0.05], higher symptom scores (8.2 +/- 0.2; 4.8 +/- 0.3), higher signs score (7.3 +/- 3.3; 3.4 +/- 5.1), and the difference was statistically significant. (3) After 4 weeks of montelukast treatment in AR patients, treatment response of anti-leukotriene in genotype AC/ CC patients is better than those in AA/CC genotype patients (F = 11.01, P < 0.05), the differences of treatment response between two groups were correlated with LTD4 levels in vivo, clinical symptoms and signs of patients.