经胎盘
胎盘
灌注
恶性疟原虫
绒毛间隙
男科
甲氟喹
胎儿
胎儿循环
化学
疟疾
药理学
人胎盘
医学
生物
内科学
免疫学
怀孕
遗传学
作者
Maria Monica Barzago,D. Omarini,Angela Bortolotti,Franco Fabio Stellari,Giorgio Lucchini,S Efrati,Maurizio Bonati
出处
期刊:PubMed
日期:1994-04-01
卷期号:269 (1): 28-31
被引量:10
摘要
Mefloquine (MQ) is highly effective in the treatment and prophylaxis of chloroquine-resistant Plasmodium falciparum malaria. Despite its widespread use, scant information is available on the transplacental profile and time course of MQ transfer across the human placenta. Six human placentas were perfused with human plasma for 180 min using recirculating maternal and fetal circuits. The viability of the placental preparation was validated measuring oxygen and carbon dioxide balance and the rates of glucose consumption and lactate production. MQ data were compared with antipyrine, a routine marker in placental perfusions. Disappearance of MQ from the maternal circulation after a dose of 0.8 mg/liter was biexponential, with a first, rapid distribution phase into the placental tissue. The apparent first-order distribution (lambda 1) and elimination (lambda z) rate constants were 0.043 +/- 0.014 min-1 and 0.020 +/- 0.007 min-1, respectively. The fetomaternal mass ratio became constant (0.46 +/- 0.07) after 120 min of perfusion and the time needed to achieve equal concentrations on both sides of the placenta was 178 +/- 31 min. MQ clearance was 3.36 +/- 0.38 ml/min. About 40% of the MQ maternal dose was recovered in tissue and 11% appeared in the fetal circulation. These data provide support for using MQ in pregnant women for both the treatment and prophylaxis of Plasmodium malaria, although comparison with other compounds are needed.
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