RESUMEN
RW94 is a permitted additive in the food industry, which precipitates fatty acids in vitro. In vivo, this could result in reduced fatty acid absorption by the body, and may, therefore, influence the amount of fat excreted in the faeces. An investigation into the effects of RW94 on bodily fat absorption and excretion was undertaken. The safety, tolerability and efficacy of the product was compared with placebo in a group of 12 healthy volunteers, randomly assigned to receive either RW94 or placebo for a period of four days when dietary fat intake was controlled. After a 10-day washout period, the randomly assigned groups were crossed over to receive placebo and RW94, respectively, for a second 4-day period, when fat intake was similarly controlled. Five grams of RW94 administered orally 30 min after each meal resulted in a statistically significant increase in the amount of excreted faecal lipids compared with placebo (p < 0.05). Following high fat intake, total blood cholesterol was predictably raised in both placebo and RW94 groups, but was less markedly raised with RW94 than placebo. All subjects lost body weight during the study, but the loss while consuming RW94 was significantly greater (p < 0.05) than while consuming placebo. All subjects found the treatments acceptable, though an increased incidence of flatulence, rumbling stomach and abdominal discomfort was noted with RW94 compared with placebo. RW94 was comparable with placebo in respect of safety.
Asunto(s)
Grasas de la Dieta/farmacocinética , Ácidos Grasos/farmacocinética , Aditivos Alimentarios/farmacología , Absorción Intestinal/efectos de los fármacos , Adulto , Estudios Cruzados , Método Doble Ciego , Grasas/análisis , Heces/química , Flatulencia/inducido químicamente , Humanos , Hipercolesterolemia/prevención & control , Lípidos/sangre , Obesidad/prevención & controlRESUMEN
BACKGROUND: Lp(a) lipoprotein has structural homology with plasminogen and has been shown to inhibit plasminogen activation in vitro. OBJECTIVE: To determine whether the serum concentration of Lp(a) lipoprotein present when streptokinase was given in acute myocardial infarction influenced the outcome as judged by electrocardiographic methods. PATIENTS AND DESIGN: Serum Lp(a) lipoprotein concentration was measured in 135 consecutive patients admitted with a diagnosis of acute myocardial infarction who received streptokinase treatment. Recovery from myocardial injury was assessed by the reduction in the sum of ST segment elevation measured from the J point (STJ) in the electrocardiogram immediately before streptokinase was given compared with that three hours later. RESULTS: The serum Lp(a) lipoprotein concentrations were measured within 12 hours of the onset of symptoms of myocardial infarction and were higher than in healthy reference populations. Recovery from myocardial infarction could be assessed from the STJ in 116 patients (86% of the series). Those in whom it could not had bundle branch block, left ventricular hypertrophy, did not survive three hours, or had started intravenous nitrate treatment or some other clinical procedure before or at the time the second electrocardiogram was to be recorded. Patients with reductions in STJ after streptokinase that were > 4 mm (the median decrease) had mean (range) serum Lp(a) lipoprotein concentrations of 41.0 (0.8-220) mg/dl and those with a smaller reduction in STJ had concentrations of 29.1 (1.7-151) mg/dl. The difference was not statistically significant. CONCLUSION: In this study Lp(a) lipoprotein concentration did not significantly influence the outcome of thrombolytic treatment with streptokinase.