Intermittent Screening and Treatment (IST) or Intermittent Preventive Treatment (IPT) With Dihydroartemisinin-Piperaquine, Versus IPT With Sulfadoxine-Pyrimethamine for the Control of Malaria in Pregnancy in Kenya: a Randomized Controlled Trial
试验速览
- 阶段
- 4 期
- 状态
- 已完成
- 入组人数
- 1,546
- 试验地点
- 4
- 主要终点
- Maternal malaria at delivery
研究概览
简要总结
Malaria in pregnancy (MiP) due to Plasmodium falciparum infection is a major cause of maternal morbidity and poor birth outcomes. Intermittent preventive treatment in pregnancy (IPTp) with Sulfadoxine pyrimethamine (SP), the administration of SP at predefined intervals in the second and third trimesters of pregnancy irrespective of the presence of malaria parasitemia, is currently recommended for HIV-negative women in all areas with stable moderate to high transmission of malaria. Due to increasing resistance to SP, it is no longer used as a treatment for symptomatic malaria, and the efficacy of IPTp-SP seems to be decreased. This study aims to look at a new drug, Dihydroartemisinin-Piperaquine (DP) for IPTp, as well as to explore the strategy of intermittent screening and treatment in pregnancy (ISTp) with DP. This strategy uses increased screening at time of focused antenatal care (FANC) with treatment of women who screen positive.
The hypothesis is that the efficacy of both IPTp-DP and ISTp-DP will be associated with a reduction in malaria infection at delivery among HIV(-) women when compared to IPTp-SP, in an area with decreasing malaria transmission and high levels of SP resistance in Kenya.
详细描述
Malaria in pregnancy (MiP) due to Plasmodium falciparum infection is a major cause of maternal morbidity and poor birth outcomes. Pregnant women are at increased risk of more frequent and severe malaria infections than are non-pregnant women. Intermittent preventive treatment in pregnancy (IPTp), the administration of treatment doses of an antimalarial at predefined intervals in the second and third trimesters of pregnancy irrespective of the presence of malaria parasitemia, is currently recommended for HIV-negative women in all areas with stable moderate to high transmission of malaria. The strategy is thought to work by providing intermittent clearance or suppression of parasites in the placenta, and preventing new infections from occurring through the prophylactic effect of the recommended drug for IPTp, sulfadoxine-pyrimethamine (SP).
SP is the only drug currently used for IPTp. Due to increasing resistance to SP, it is no longer used as a treatment for symptomatic malaria, however, IPTp with SP remains effective even in areas where SP resistance in children under five (determined by in vivo efficacy studies) is up to 26%. SP therefore continues to be used for IPTp in many countries where it is no longer used for treatment of symptomatic malaria. However, more recent data from northern Tanzania and Malawi indicate that at higher rates of resistance, IPTp-SP may no longer be effective, and could potentially be harmful.
In view of this data, a search for alternatives to IPTp-SP is warranted. One strategy would be to choose a different drug for IPTp. Of the available combinations, Dihydroartemisinin-Piperaquine (DP) remains one of the most attractive options because of the long half-life of piperaquine (PQ) and the demonstrated efficacy and safety in pregnancy. Another strategy to consider is intermittent screening and treatment in pregnancy (ISTp), whereby there is increased screening at time of focused antenatal care (FANC) with treatment of women who screen positive. The same properties (long half-life, tolerability, safety, once daily dosing) which make DP a good choice for IPTp also make it one of the best available options for ISTp.
This study aims to compare the efficacy of IPTp-SP against that of IPTp-DP and ISTp-DP to determine if these alternate strategies are associated with a reduction in malaria infection at delivery among HIV(-) women in an area with decreasing malaria transmission and high levels of SP resistance in Kenya.
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Parallel
- 主要目的
- Prevention
- 盲法
- None
入排标准
- 性别
- Female
- 接受健康志愿者
- 否
入选标准
- •Viable pregnancy assessed by Doppler
- •Gestational age 16 to 32 weeks (inclusive) by fundal height
- •No history of IPTp use during this pregnancy
- •Willing to participate and complete the study schedule
- •Willing to sign or thumb print informed consent
- •Resident of study area and intending to stay in the area for the duration of the follow-up
- •Willing to deliver in the labor ward of the study clinic or hospital
- •HIV negative at enrolment
排除标准
- •HIV positive or unknown
- •Residence outside study area or planning to move out in the 12 months following enrolment
- •High risk pregnancy, including any pre-existing illness likely to cause complication of pregnancy (hypertension, diabetes, asthma, epilepsy, renal disease, liver disease, fistula repair, leg or spine deformity)
- •Severe anemia requiring blood transfusion (Hb ≤ 7.0 g/dL) at enrolment
- •Known allergy or previous adverse reaction to any of the study drugs
- •Unable to give informed consent (for example due to mental disability)
- •Previous inclusion in the same study
- •Gestational age >32 weeks
- •Previous IPTp during the current pregnancy
- •Participating in other malaria intervention studies
- •Known or suspected cardiac disease
- •Patients taking drugs in any of the following classes: antiarrhythmic agents, neuroleptics, macrolides, and certain antimalarial drugs such as mefloquine, chloroquine, halofantrine and lumefantrine.
研究组 & 干预措施
IPTp-DP
At each ANC visit, women will be given treatment with Dihydroartemisinin-piperaquine for three days, with the daily number of tablets depending on the weight of the woman; two tablets for women weighing 24- 35.9kg, three tablets for women weighing 36 to 74.9 kg, and four tablets for women weighing 75kg or more. The first dose will be observed; the woman will be given the additional 2 doses to take at home and there may be a home visit to confirm that the tablets were taken.
干预措施: IPTp-DP (Drug)
ISTp-DP
At each ANC visit, women will be screened for malaria using a combined HRP-2/ pLDH (P. falciparum/ pan-malaria) rapid diagnostic test, and if they test positive, will be treated with dihydroartemisinin-piperaquine (DP). Each tablet will contain 40 mg dihydroartemisinin and 320 mg piperaquine. Treatment will be given for three days, with the daily number of tablets depending on the weight of the woman; two tablets for women weighing 24- 35.9kg, three tablets for women weighing 36 to 74.9 kg, and four tablets for women weighing 75kg or more. The first dose will be observed; the woman will be given the additional 2 doses to take at home
干预措施: ISTp-DP (Drug)
IPTp-SP
Treatment with a single dose of three tablets of sulfadoxine-pyrimethamine, each containing sulfadoxine (500 mg) and pyrimethamine (25 mg) at each FANC visit. This is the standard regimen.
干预措施: IPTp-SP (Drug)
结局指标
主要结局
Maternal malaria at delivery
时间窗: Delivery
Active or recent infection at delivery measured as the composite of peripheral and placental malaria, detected by: positive peripheral blood smear or RDT or positive placental smear, RDT, or histopathology
次要结局
- Decreased fetal morbidity(Delivery)
- Pharmacokinetics- piperaquine level(At baseline, and day 2 and day 7 following dosing.)
- level of antibodies to variant surface antigens (VSAs)(At delivery)
- Frequency of fetal congenital malformations(At delivery)
- Frequency of maternal adverse events(At each ANC visit and at delivery)
研究者
Abraham Katana, MD
Medical Officer
Kenya Medical Research Institute