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1.
Antimicrob Agents Chemother ; 68(1): e0109923, 2024 Jan 10.
Artículo en Inglés | MEDLINE | ID: mdl-38059635

RESUMEN

This was a phase I, randomized, double-blind, placebo-controlled, ascending single- and multiple-dose study of oral ceftibuten to describe the pharmacokinetics (PK) of cis-ceftibuten (administered form) and trans-ceftibuten (metabolite), and to describe safety and tolerability at higher than licensed doses. Subjects received single 400, 600, or 800 mg doses of ceftibuten on Days 1 and 4, followed by 7 days of twice-daily dosing from Days 4 to 10. Non-compartmental methods were used to describe parent drug and metabolite PK in plasma and urine. Dose proportionality was examined using C max, AUC0-12, and AUC0-INF. Accumulation was calculated as the ratio of AUC0-12 on Days 4 and 10. Adverse events (AEs) were monitored throughout the study. Following single ascending doses, mean cis- and trans-ceftibuten C max were 17.6, 24.1, and 28.1 mg/L, and 1.1, 1.5, and 2.2 mg/L, respectively; cis-ceftibuten urinary recovery accounted for 64.3%-86.9% of the administered dose over 48 h. Following multiple ascending doses, mean cis- and trans-ceftibuten C max were 21.7, 28.1, and 38.8 mg/L, and 1.4, 1.9, and 2.8 mg/L, respectively; cis-ceftibuten urinary recovery accounted for 72.2%-96.4% of the administered dose at steady state. The exposure of cis- and trans-ceftibuten increased proportionally with increasing doses. Cis- and trans-ceftibuten accumulation factor was 1.14-1.19 and 1.28-1.32. The most common gastrointestinal treatment emergent AEs were mild and resolved without intervention. Ceftibuten was well tolerated. Dose proportionality and accumulation of cis- and trans-ceftibuten were observed. These results support the ongoing development of ceftibuten at doses up to 800 mg twice-daily. (The study was registered at ClinicalTrials.gov under the identifier NCT03939429.).


Asunto(s)
Ceftibuteno , Adulto , Humanos , Área Bajo la Curva , Método Doble Ciego , Voluntarios Sanos , Administración Oral , Relación Dosis-Respuesta a Droga
2.
Artículo en Inglés | MEDLINE | ID: mdl-33685898

RESUMEN

The pharmacokinetics and safety of biapenem were studied in 36 healthy adult subjects in a randomized, placebo-controlled, double blind, sequential single and multiple-ascending dose study using doses from 250 to 1250 mg administered three times a day using 3-hour infusions. Maximum concentrations for biapenem were achieved at the end of the 3-hour infusion. Biapenem exposure (AUC) increased in a slightly greater than dose-proportional manner following single and multiple doses with no evidence of accumulation with multiple doses. Plasma AUCs increased from 18 mg*h/L at 250 mg to 150 mg*h/L at 1250 mg. Urinary recovery ranged from 14.2% at 250 mg to 42.3% at 1250 mg. Biapenem was well tolerated up to 1000 mg administered every 8 hours by 3-hour infusion for 7 days; however, a higher incidence of nausea, vomiting, and rash was reported at 1250 mg. There were no serious adverse events (SAEs) reported following either single or multiple doses of biapenem and all AEs were mild or moderate in severity.

3.
Artículo en Inglés | MEDLINE | ID: mdl-29437614

RESUMEN

Meropenem-vaborbactam is a fixed combination of the novel ß-lactamase inhibitor vaborbactam and the carbapenem antibiotic meropenem, developed for the treatment of serious infections caused by drug-resistant Gram-negative bacteria. The safety, tolerability, and pharmacokinetics (PK) of vaborbactam and meropenem following single and multiple ascending doses of each study drug administered alone or combined were evaluated in 76 healthy adult subjects in a randomized, placebo-controlled, double-blind study. Subjects were enrolled in 1 of 5 dose cohorts (receiving 250 to 2,000 mg vaborbactam and/or 1,000 to 2,000 mg meropenem) alone or in combination. No subjects discontinued the study due to adverse events (AEs), and no serious AEs were observed. The pharmacokinetics of meropenem and vaborbactam were similar when given alone or in combination; all evaluated plasma PK exposure measures (peak plasma concentration, area under the plasma concentration-time curve [AUC] from time zero to the last measurable concentration area under the plasma concentration-time curve, and AUC from time zero to infinity) were similar for the study drugs alone versus those in combination, indicating no pharmacokinetic interaction between meropenem and vaborbactam. Across all treatments, 47 to 64% of an administered meropenem dose and 75 to 95% of vaborbactam was excreted unchanged in the urine over 48 h postdose. Meropenem and vaborbactam, when given alone or in combination, have similar pharmacokinetic properties, with no plasma or urine PK drug-drug interactions, and are well tolerated. These findings supported further clinical investigation of the combination product. (This study is registered at ClinicalTrials.gov under registration no. NCT01897779.).


Asunto(s)
Ácidos Borónicos/efectos adversos , Ácidos Borónicos/farmacocinética , Meropenem/efectos adversos , Meropenem/farmacocinética , Adolescente , Adulto , Método Doble Ciego , Esquema de Medicación , Interacciones Farmacológicas , Femenino , Voluntarios Sanos , Humanos , Masculino , Persona de Mediana Edad , Adulto Joven
4.
Artículo en Inglés | MEDLINE | ID: mdl-29311069

RESUMEN

Vaborbactam is a member of a new class of ß-lactamase inhibitors with inhibitory activity against serine carbapenemases (e.g., Klebsiella pneumoniae carbapenemase) that has been developed in combination with meropenem. The pharmacokinetics of the combination was evaluated in 41 subjects with chronic renal impairment in a phase 1, open-label, single-dose study. Subjects were assigned to one of five groups based on renal function: normal (creatinine clearance of ≥90 ml/min), mild (estimated glomerular filtration rate [eGFR] of 60 to 89 ml/min/1.73 m2), moderate (eGFR of 30 to <60), or severe (eGFR of <30) impairment plus end-stage renal disease (ESRD) patients on hemodialysis. Subjects received a single intravenous dose of 1 g of meropenem plus 1 g of vaborbactam by 3-h infusion. The ESRD group received two doses (on and off dialysis) separated by a washout. Pharmacokinetic parameters were estimated by standard noncompartmental methods. For both meropenem and vaborbactam, the area under the concentration-time curve was larger and the elimination half-life was longer with decreasing renal function. Meropenem and vaborbactam total plasma clearance (CLt) rates were similar and decreased with decreasing renal function. Slopes of the linear relationship between eGFR and CLt were similar, indicating a similar proportional reduction in CLt with decreasing renal function. Hemodialysis significantly increased drug clearance of meropenem (mean of 2.21-fold increase in CLt, P < 0.001) and vaborbactam (mean of 5.11-fold increase, P = 0.0235) relative to drug administration off dialysis, consistent with dose recovery rates of 38.3% and 52.9% for meropenem and vaborbactam, respectively, in dialysate. Plasma clearance of meropenem and vaborbactam is reduced with renal impairment, requiring dose adjustment. Hemodialysis removes both drugs. (This study has been registered at ClinicalTrials.gov under identifier NCT02020434.).


Asunto(s)
Antibacterianos/farmacocinética , Ácidos Borónicos/farmacocinética , Fallo Renal Crónico/sangre , Meropenem/farmacocinética , Diálisis Renal , Insuficiencia Renal Crónica/sangre , Adulto , Anciano , Antibacterianos/sangre , Antibacterianos/orina , Área Bajo la Curva , Ácidos Borónicos/sangre , Ácidos Borónicos/orina , Creatinina/sangre , Esquema de Medicación , Combinación de Medicamentos , Femenino , Tasa de Filtración Glomerular/fisiología , Semivida , Humanos , Inyecciones Intravenosas , Fallo Renal Crónico/fisiopatología , Fallo Renal Crónico/terapia , Fallo Renal Crónico/orina , Masculino , Meropenem/sangre , Meropenem/orina , Persona de Mediana Edad , Insuficiencia Renal Crónica/fisiopatología , Insuficiencia Renal Crónica/terapia , Insuficiencia Renal Crónica/orina
5.
Antimicrob Agents Chemother ; 60(10): 6326-32, 2016 10.
Artículo en Inglés | MEDLINE | ID: mdl-27527080

RESUMEN

Vaborbactam (formerly RPX7009) is a member of a new class of ß-lactamase inhibitor with pharmacokinetic properties similar to those of many ß-lactams, including carbapenems. The pharmacokinetics and safety of vaborbactam were evaluated in 80 healthy adult subjects in a first-in-human randomized, placebo-controlled, double-blind, sequential single- and multiple-ascending-dose study. A total of 10 dose cohorts were enrolled in the study, with 6 subjects randomized to receive 250 to 2,000 mg of vaborbactam and 2 subjects randomized to receive placebo in each cohort. Maximum concentrations for vaborbactam were achieved at the end of the 3-h infusion. Vaborbactam exposure (Cmax and area under the concentration-time curve [AUC]) increased in a dose-proportional manner following multiple doses. There was no evidence of accumulation with multiple doses, consistent with the terminal half-life of ∼2 h. Both the volume of distribution (Vss) and plasma clearance were independent of dose. For the 2,000-mg dose, the plasma clearance was 0.17 ± 0.03 liters/h, the AUC from 0 h to infinity (AUC0-∞) was 144.00 ± 13.90 mg · h/liter, and the Vss was 21.80 ± 2.26 mg · h/liter. Urinary recovery was 80% or greater over 48 h across all dose groups. No subjects discontinued the study due to adverse events (AEs), and no serious AEs (SAEs) were observed. All AEs were mild to moderate and similar among the vaborbactam- and placebo-treated subjects, with mild lethargy as the only unique AE reported with the high dose of vaborbactam. Overall, this study revealed the safety, tolerability, and pharmacokinetic profile of vaborbactam and formed the basis for advancement into patient studies in combination with meropenem, including treatment of patients with carbapenem-resistant Enterobacteriaceae (CRE) infections. (This study is registered at ClinicalTrials.gov under identifier NCT01751269.).


Asunto(s)
Ácidos Borónicos/administración & dosificación , Ácidos Borónicos/farmacocinética , Compuestos Heterocíclicos con 1 Anillo/administración & dosificación , Compuestos Heterocíclicos con 1 Anillo/farmacocinética , Administración Intravenosa , Adulto , Ácidos Borónicos/efectos adversos , Femenino , Semivida , Voluntarios Sanos , Compuestos Heterocíclicos con 1 Anillo/efectos adversos , Humanos , Masculino
6.
J Cyst Fibros ; 15(4): 495-502, 2016 07.
Artículo en Inglés | MEDLINE | ID: mdl-26852040

RESUMEN

RATIONALE: For patients with cystic fibrosis (CF), the use of inhaled antibiotics has become standard of care to suppress chronic Pseudomonas airways infection. There are limited antibiotic options formulated and approved for inhaled use and antibiotic efficacies attenuate over time, making additional inhaled antibiotic classes desirable. APT-1026 (levofloxacin inhalation solution, LIS) is a fluoroquinolone in development for management of chronic P. aeruginosa airways infection in patients with CF. OBJECTIVES: To compare the safety and efficacy of a 28-day course of treatment with LIS 240mg or placebo BID in persons ≥12years old with CF and chronic P. aeruginosa infection. METHODS: A multinational, randomized (2:1), double-blinded study of LIS and placebo over 28days in CF patients ≥12years with chronic P. aeruginosa infection. Time to exacerbation was the primary endpoint. FEV1 (% predicted) and patient-reported quality of life were among secondary endpoints. MAIN RESULTS: Baseline demographics for 330 subjects (LIS=220) were similar although significantly more patients randomized to LIS had experienced multiple exacerbations in the year prior to study entry. There was no statistically significant difference in protocol-defined pulmonary exacerbations between treatment arms. Relative change in FEV1% predicted from baseline was significantly greater for patients randomized to LIS compared to those randomized to placebo (mean difference 1.31%, p=0.01 [95% CI 0.27, 2.34%]). LIS was well-tolerated, with dysguesia the most frequent adverse event. CONCLUSIONS: LIS did not demonstrate a difference in time to next exacerbation when compared to placebo. Reasons for this result are discussed but may be due to an imbalance in the frequency of prior pulmonary exacerbations between the two groups. An improvement in FEV1 (% predicted) at 28days was observed and LIS was well tolerated. LIS is safe and has a potential role in the management of CF patients with chronic P. aeruginosa.


Asunto(s)
Fibrosis Quística , Levofloxacino , Infecciones por Pseudomonas , Pseudomonas aeruginosa , Calidad de Vida , Administración por Inhalación , Adolescente , Adulto , Antibacterianos/administración & dosificación , Antibacterianos/efectos adversos , Enfermedad Crónica , Fibrosis Quística/diagnóstico , Fibrosis Quística/tratamiento farmacológico , Fibrosis Quística/microbiología , Fibrosis Quística/psicología , Método Doble Ciego , Monitoreo de Drogas/métodos , Femenino , Volumen Espiratorio Forzado , Humanos , Levofloxacino/administración & dosificación , Levofloxacino/efectos adversos , Masculino , Infecciones por Pseudomonas/diagnóstico , Infecciones por Pseudomonas/tratamiento farmacológico , Infecciones por Pseudomonas/fisiopatología , Pseudomonas aeruginosa/efectos de los fármacos , Pseudomonas aeruginosa/aislamiento & purificación , Evaluación de Síntomas , Brote de los Síntomas , Resultado del Tratamiento
7.
J Cyst Fibros ; 14(4): 507-14, 2015 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-25592656

RESUMEN

BACKGROUND: Inhaled antibiotics are standard of care for persons with cystic fibrosis (CF) and chronic Pseudomonas aeruginosa airway infection. APT-1026 (levofloxacin inhalation solution, LIS) is fluoroquinolone in development. We compared the safety and efficacy of LIS to tobramycin inhalation solution (TIS) in persons ≥12 years old with CF and chronic P. aeruginosa infection. METHODS: This multinational, randomized (2:1), non-inferiority study compared LIS and TIS over three 28-day on/off cycles. Day 28 FEV(1) % predicted relative change was the primary endpoint. Time to exacerbation and patient-reported quality of life were among secondary endpoints. RESULTS: Baseline demographics for 282 subjects were comparable. Non-inferiority was demonstrated (1.86% predicted mean FEV(1) difference [95% CI -0.66 to 4.39%]). LIS was well-tolerated, with dysgeusia (taste distortion) as the most frequent adverse event. CONCLUSIONS: LIS is a safe and effective therapy for the management of CF patients with chronic P. aeruginosa infection.


Asunto(s)
Antibacterianos/administración & dosificación , Fibrosis Quística/tratamiento farmacológico , Levofloxacino/administración & dosificación , Infecciones por Pseudomonas/tratamiento farmacológico , Pseudomonas aeruginosa , Tobramicina/administración & dosificación , Administración por Inhalación , Adolescente , Adulto , Enfermedad Crónica , Fibrosis Quística/microbiología , Femenino , Volumen Espiratorio Forzado , Humanos , Masculino , Infecciones por Pseudomonas/complicaciones , Calidad de Vida , Resultado del Tratamiento , Adulto Joven
8.
Am J Respir Crit Care Med ; 183(11): 1510-6, 2011 Jun 01.
Artículo en Inglés | MEDLINE | ID: mdl-21471106

RESUMEN

RATIONALE: Lower respiratory tract infection with Pseudomonas aeruginosa (PA) is associated with increased morbidity in patients with cystic fibrosis (CF). Current treatment guidelines for inhaled antibiotics are not universally followed due to the perception of decreased efficacy, increasing resistance, drug intolerance, and high treatment burden with current aerosol antibiotics. New treatment options for CF pulmonary infections are needed. OBJECTIVES: This study assessed the efficacy and safety of a novel aerosol formulation of levofloxacin (MP-376, Aeroquin) in a heavily treated CF population with PA infection. METHODS: This study randomized 151 patients with CF with chronic PA infection to one of three doses of MP-376 (120 mg every day, 240 mg every day, 240 mg twice a day) or placebo for 28 days. The primary efficacy endpoint was the change in sputum PA density. Secondary endpoints included changes in pulmonary function, the need for other anti-PA antimicrobials, changes in patient-reported symptom scores, and safety monitoring. MEASUREMENTS AND MAIN RESULTS: All doses of MP-376 resulted in reduced sputum PA density at Day 28, with MP-376 240 mg twice a day showing a 0.96 log difference compared with placebo (P = 0.001). There was a dose-dependent increase in FEV(1) for MP-376, with a difference of 8.7% in FEV(1) between the 240 mg twice a day group and placebo (P = 0.003). Significant reductions (61-79%) in the need for other anti-PA antimicrobials were observed with all MP-376 treatment groups compared with placebo. MP-376 was generally well tolerated relative to placebo. CONCLUSIONS: Nebulized MP-376was well tolerated and demonstrated significant clinical efficacy in heavily treated patients with CF with PA lung infection. Clinical trial registered with www.clinicaltrials.gov (NCT00677365).


Asunto(s)
Antibacterianos/administración & dosificación , Fibrosis Quística/complicaciones , Levofloxacino , Ofloxacino/administración & dosificación , Infecciones por Pseudomonas/tratamiento farmacológico , Administración por Inhalación , Adulto , Relación Dosis-Respuesta a Droga , Método Doble Ciego , Femenino , Humanos , Infecciones por Pseudomonas/complicaciones , Pseudomonas aeruginosa/efectos de los fármacos , Pruebas de Función Respiratoria , Soluciones , Esputo/microbiología , Resultado del Tratamiento
9.
Antimicrob Agents Chemother ; 55(6): 2636-40, 2011 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-21444699

RESUMEN

The pharmacokinetics and tolerability of nebulized MP-376 (levofloxacin inhalation solution [Aeroquin]) were determined in cystic fibrosis (CF) subjects. Ten CF subjects received single 180-mg doses of two formulations of MP-376, followed by a multiple-dose phase of 240 mg once daily for 7 days. Serum and expectorated-sputum samples were assayed for levofloxacin content. Safety was evaluated following the single- and multiple-dose study phases. Nebulized MP-376 produced high concentrations of levofloxacin in sputum. The mean maximum plasma concentration (C(max)) ranged between 2,563 and 2,932 mg/liter for 180-mg doses of the 50- and 100-mg/ml formulations, respectively. After 7 days of dosing, the mean C(max) for the 240-mg dose was 4,691 mg/liter. The mean serum levofloxacin C(max) ranged between 0.95 and 1.28 for the 180-mg doses and was 1.71 for the 240-mg dose. MP-376 was well tolerated. Nebulized MP-376 produces high sputum and low serum levofloxacin concentrations. The pharmacokinetics, safety, and tolerability were similar for the two formulations. MP-376 240 mg (100 mg/ml) is being advanced into late-stage clinical development.


Asunto(s)
Antibacterianos/farmacocinética , Fibrosis Quística/tratamiento farmacológico , Levofloxacino , Ofloxacino/farmacocinética , Administración por Inhalación , Adolescente , Adulto , Área Bajo la Curva , Estudios Cruzados , Femenino , Humanos , Masculino , Persona de Mediana Edad , Ofloxacino/efectos adversos , Método Simple Ciego , Soluciones
10.
Diagn Microbiol Infect Dis ; 50(2): 95-102, 2004 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-15474317

RESUMEN

Oritavancin (LY333328 diphosphate) is a novel glycopeptide antimicrobial agent with potent microbiological activity in vitro against Gram-positive bacteria. A single-dose, open-label, noncontrolled, dose-escalation study in 11 healthy human subjects was carried out to evaluate the safety and pharmacokinetics of oritavancin. One subject at each dose level received a single intravenous dose of 0.02, 0.03, 0.05, 0.08, 0.125, 0.20, and 0.325 mg/kg infused over 1 hour and four subjects each received a single-dose of 0.5 mg/kg. Safety and tolerability were evaluated by monitoring adverse events and laboratory parameters. Oritavancin pharmacokinetics were assessed by blood, urine, and fecal sampling. The plasma concentrations of oritavancin after the end of infusion followed a multiexponential decline over a 2-week period. Median (range) C(max) for the 0.5 mg/kg dose group was 6.5 (4.7-7.6) microg/mL. In every subject, plasma concentrations declined to < or =10% of the C(max) within 24 hours. Following a short, constant-rate infusion, the pharmacokinetics of oritavancin were linear across a total dose range from 3.66-44.6 mg. Renal clearance was approximately 0.457 mL/min. The mean (range) plasma terminal half-life of oritavancin was 195.4 (135.8-273.8) hours across all dose levels from 0.05-0.5 mg/kg. Less than 5% and 1% of administered drug were recovered in the urine and feces, respectively, after 7 days. This first time in man evaluation of oritavancin revealed that single doses of oritavancin of up to and including 0.5 mg/kg were safe and well tolerated. Although no clinically relevant changes in renal, hepatic and hematologic indices from baseline were observed, five subjects did manifest asymptomatic and transient elevations of hepatic transaminase concentrations. Because this study was not placebo-controlled and enrolled a small number of subjects, the safety and pharmacokinetic profiles of oritavancin need to be confirmed in additional studies.


Asunto(s)
Antibacterianos/administración & dosificación , Antibacterianos/farmacocinética , Glicopéptidos , Adulto , Área Bajo la Curva , Disponibilidad Biológica , Relación Dosis-Respuesta a Droga , Esquema de Medicación , Femenino , Semivida , Humanos , Inyecciones Intravenosas , Lipoglucopéptidos , Masculino , Dosis Máxima Tolerada , Persona de Mediana Edad , Estudios Prospectivos , Valores de Referencia , Sensibilidad y Especificidad
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