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1.
Int J Pharm ; 340(1-2): 1-5, 2007 Aug 01.
Artículo en Inglés | MEDLINE | ID: mdl-17606340

RESUMEN

This paper describes the effect on Sun Protection Factor (SPF) of the combination of inorganic and organic filters in sunscreen products as determined by an in vitro method. O/W emulsions containing inorganic filters, such as titanium dioxide and zinc oxide, combined with 18 EU-authorized UV-B organic filters were tested. SPF measurements were carried out using a spectrophotometer equipped with an integrating sphere. This study observed a synergic effect when titanium dioxide was combined with either anisotriazine or octyldimethylPABA. The combination of zinc oxide with 11 UV-B organic filters also exhibited a similar synergy; however, the measured SPF was systematically lower than the protection factor achieved with titanium dioxide.


Asunto(s)
Evaluación Preclínica de Medicamentos/métodos , Espectrofotometría Ultravioleta , Protectores Solares/química , Titanio/química , Triazinas/química , Óxido de Zinc/química , para-Aminobenzoatos , Ácido 4-Aminobenzoico/química , Ácido 4-Aminobenzoico/farmacología , Química Farmacéutica , Combinación de Medicamentos , Composición de Medicamentos , Sinergismo Farmacológico , Emulsiones , Eritema/etiología , Eritema/prevención & control , Modelos Químicos , Aceites/química , Polimetil Metacrilato/química , Protectores Solares/farmacología , Titanio/farmacología , Triazinas/farmacología , Rayos Ultravioleta/efectos adversos , Agua/química , Óxido de Zinc/farmacología
2.
Eur J Cancer ; 35(9): 1343-7, 1999 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-10658525

RESUMEN

CPT-11 (irinotecan) has shown activity in patients with advanced colorectal cancer resistant to leucovorin (LV) and 5-fluorouracil (5-FU). In this study, the simplified bimonthly LV-5-FU regimen was combined with CPT-11 (FOLFIRI) as third-line therapy for patients with advanced colorectal cancer. Continuous infusion of 5-FU was administered with disposable pumps as outpatient therapy. FOLFIRI consisted of CPT-11 180 mg/m2 as a 90-min infusion day 1; LV 400 mg/m2 as a 2-h infusion during CPT-11, immediately followed by 5-FU bolus 400 mg/m2 and 46-h continuous infusion of 2.4-3 g/m2 every 2 weeks. Among the 33 patients treated, 2 had partial responses for an overall response rate of 6%; 20 patients were stabilised (61%) and 11 had disease progression (33%). From the start of FOLFIRI, median progression-free survival was 18 weeks and median survival was 43 weeks. For the 242 cycles analysed, NCI-CTC toxicities grade 3-4 per patient were nausea 15%, diarrhoea 12% and neutropenia 15%. Overall, 10 patients (30%) experienced grade 3-4 toxicity. 7 patients (21%) had grade 2 alopecia. FOLFIRI generated activity and acceptable toxicity, in heavily pretreated patients, with limited diarrhoea, mostly asymptomatic neutropenia and manageable nausea and relatively uncommon alopecia. This regimen is suitable for studies in chemotherapy-naïve patients.


Asunto(s)
Protocolos de Quimioterapia Combinada Antineoplásica/uso terapéutico , Neoplasias Colorrectales/tratamiento farmacológico , Adulto , Anciano , Camptotecina/administración & dosificación , Camptotecina/análogos & derivados , Neoplasias Colorrectales/secundario , Supervivencia sin Enfermedad , Femenino , Fluorouracilo/administración & dosificación , Humanos , Infusiones Intravenosas , Irinotecán , Leucovorina/administración & dosificación , Masculino , Persona de Mediana Edad , Resultado del Tratamiento
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