Clinical trial NCT04783051: Comparison of ISTp- PYRAMAX-US-RDT to IPTp-SP to Prevent Malaria in Pregnant Women in DRC (ULTRAPYRAPREG)
Official title: Comparison of IST Using Ultra-sensitive Malaria Rapid Diagnostic Test and Pyronaridine - Artesunate - PYRAMAX®) to Standard IPT Sulfadoxine-pyrimethamine to Prevent Malaria in Pregnant Women Living in Endemic Areas
Study type: INTERVENTIONAL
Overall status: COMPLETED
Phase: PHASE3
Conditions: Malaria in Pregnancy
Keywords: Malaria
Pregnancy
IPTp-SP
ISTp-Pyramax
Kinshasa
DR Congo
Lead sponsor: University of Kinshasa
Sponsor class: OTHER
Collaborators: name: European and Developing Countries Clinical Trials Partnership (EDCTP)
name: Novartis
First posted: 2021-03-04
Enrollment: 250
Sex: FEMALE
Minimum age (years): 18
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: yes
Allocation: RANDOMIZED
Intervention model: PARALLEL
Primary purpose: PREVENTION

Brief summary: In endemic settings Plasmodium falciparum (Pf) can sequester in the placenta resulting in low peripheral parasitemia and false negative malaria diagnosis in pregnant women. Intermittent Preventive Treatment in pregnant women with Sulphadoxine-Pyrimethamine (IPTp-SP) is one of the World Health Organization's recommended malaria control strategies in sub-Saharan African countries. The strategy overcomes the risk of misdiagnosis of malaria in pregnant women by treating them all with SP according to predetermined schedules, but the strategy is now threatened by the spread of Plasmodium parasite resistant strains. As a necessary alternative, Intermittent Screening and Treatment in pregnancy (ISTp), aims on the monthly screening of pregnant women with a malaria rapid diagnostic test (RDT) and the treatment of positive cases with artemisinin-based combination therapy (ACT) regardless of the presence of symptoms. The ISTp depends on the performance of the diagnostic tests, and the use of ultrasensitive RDTs (us-RDTs), which have a higher analytical sensitivity than conventional RDTs, should improve the efficacy of the strategy.

Unlike IPTp-SP, ISTp prevents overuse of antimalarials and thus limits drug pressure on malaria parasites. This advantage could be potentiated by using, for pregnant women, an ACT that is not yet used or should not be used in the field for other strata of the population. The recently approved new ACT combination, Pyronaridine - Artesunate (Pyramax®) is the ideal candidate for this purpose.

This study will compare the effects of the ISTp using an us-RDT and Pyramax® (ISTp-US-Py) with the standard IPTp-SP on maternal malaria indicators (malaria infection, parasite density), maternal anemia, spontaneous abortions or intrauterine deaths during pregnancy, fetal morbidity (preterm birth, low birth weight, small for gestational age) and neonatal mortality at delivery in both study groups through conducting a randomized clinical trial enrolling second trimester pregnant women in Maternité Esengo Health Center, located in Kisenso, Kinshasa, the Democratic Republic of the Congo (DRC), a malaria perennial transmission area.

The results generated from this study will be essential for the National Malaria Control Program in the selection and implementation of new malaria control policies and addresses the effectiveness of IPTp-SP decline among pregnant women in the DRC.

Detailed description: 1. Introduction Malaria is a threat for pregnant women and their offspring in endemic settings (1, 2). Plasmodium falciparum (Pf) can sequester in the placenta during pregnancy, resulting in low peripheral parasitemia. As a consequence, malaria diagnostic tests are often false negative in pregnant women who actually do have a Pf malaria infection (3, 4).

Intermittent Preventive Treatment in pregnant women with Sulfadoxine-Pyrimethamine (IPTp-SP) is one of the World Health Organization (WHO)'s recommended malaria control strategies in sub-Saharan African countries (2). The IPTp-SP strategy surmounts the potential misdiagnosis of malaria in pregnant women by treating them all with SP at pre-determined schedules during the antenatal care (ANC) visits. The efficacy of IPTp-SP is dose dependent and relies on ANC coverage. However, the spread of Plasmodium SP resistant strains now threatens the efficacy of the IPTp-SP and can lead to the proliferation of placental resistant parasites in pregnant women (5-9).

As an alternative for IPTp-SP, Intermittent Screening and Treatment in pregnancy (ISTp) may be considered as an option (10). ISTp comprises of monthly screening of pregnant women with a malaria RDT and treatment of positive cases with an artemisinin-based combination therapy (ACT) regardless of the presence of symptoms. The ISTp depends on the performance of the diagnostic tests and the use of ultrasensitive RDTs (us-RDTs), which have a higher sensitivity than conventional RDTs (11, 12), can avoid false negative that would prevent the method from being effective.

Unlike IPTp-SP, ISTp prevents overuse of antimalarials and, thus, limits drug pressure on malaria parasites (10). This advantage could be potentiated by using an ACT that is not yet used or should not be used by the national malaria control for other strata of the population than pregnant women. Pyronaridine - Artesunate (Pyramax®), a newly approved antimalarial is the ideal candidate for this purpose in Democratic Republic of Congo (DRC). Pyramax®, approved for use in malaria endemic countries since 2015, is used in the field to treat malaria in children and adults (13). There is little information on the safety of Pyramax® during pregnancy, however, Pyronaridine unintentionally administered successfully treated at least 40 cases of malaria in late pregnancy (14) and, a review reported that ACTs, although Pyramax® was not included in, are generally very effective and well tolerated during the second and third trimesters (15).

The hypothesis of this study is that the ISTp using Pyramax® for the treatment and performed with the us-RDT (ISTp-US-Py) is non inferior than IPTp-SP for the prevention of maternal malaria (malaria infection, parasite density), maternal anemia, spontaneous abortions or intrauterine death during pregnancy, fetal morbidity (premature birth, low birth weight, small for gestational age) and neonatal mortality at childbirth.

Eligibility criteria: Inclusion Criteria:

1. Gestation ≥16 weeks;
2. Age: ≥18 years;
3. Residence within the health facility catchment area;
4. Willing to adhere to study requirements and to deliver at the health facility.
5. Willing to provide written informed consent; if the woman is illiterate, she can choose an impartial witness, not related to the study, to accompany her during the informant consent process and they will both sign the informed consent form

Exclusion Criteria:

1. Known history of allergy to SP or to an ACT
2. An ongoing antibioprophylaxis with cotrimoxazole,
3. Current issue requiring hospital admission (including severe malaria as defined by WHO)
4. Pregnancy at high risk

Primary outcomes:
measure: The proportion of asymptomatic malaria in the 2 study arms
timeFrame: 6 months
measure: The proportion symptomatic malaria in the 2 study arms
timeFrame: 6 months
measure: The proportion of parasitic densities in the 2 study arms
timeFrame: 6 months
measure: The proportion of anemia in the 2 study arms
timeFrame: 6 months
measure: The incidence of spontaneous abortions or intrauterine deaths in the 2 study arms
timeFrame: 6 months
measure: The proportion of fetal morbidities in the 2 study arms
timeFrame: 6 months
measure: The proportion of the neonatal and early neonatal mortality of the offspring in the 2 study arms
timeFrame: 28 days
Secondary outcomes:
Other outcomes:
Locations:
city: Kinshasa
country: Congo, The Democratic Republic of the
facility: Maternité Esengo
Study officials:
References:
citation: Nosten F, McGready R, Mutabingwa T. Case management of malaria in pregnancy. Lancet Infect Dis. 2007 Feb;7(2):118-25. doi: 10.1016/S1473-3099(07)70023-3.
citation: WHO. Guidelines for the treatment of malaria. Third edition2015. 316 p
citation: Anchang-Kimbi JK, Achidi EA, Nkegoum B, Sverremark-Ekstrom E, Troye-Blomberg M. Diagnostic comparison of malaria infection in peripheral blood, placental blood and placental biopsies in Cameroonian parturient women. Malar J. 2009 Jun 8;8:126. doi: 10.1186/1475-2875-8-126.
citation: Matangila JR, Lufuluabo J, Ibalanky AL, Inocencio da Luz RA, Lutumba P, Van Geertruyden JP. Asymptomatic Plasmodium falciparum infection is associated with anaemia in pregnancy and can be more cost-effectively detected by rapid diagnostic test than by microscopy in Kinshasa, Democratic Republic of the Congo. Malar J. 2014 Apr 2;13:132. doi: 10.1186/1475-2875-13-132.
citation: van Eijk AM, Hill J, Larsen DA, Webster J, Steketee RW, Eisele TP, ter Kuile FO. Coverage of intermittent preventive treatment and insecticide-treated nets for the control of malaria during pregnancy in sub-Saharan Africa: a synthesis and meta-analysis of national survey data, 2009-11. Lancet Infect Dis. 2013 Dec;13(12):1029-42. doi: 10.1016/S1473-3099(13)70199-3. Epub 2013 Sep 18.
citation: WHO. World Malaria Report 2017. Geneva: World Health Organization; 2017
citation: Harrington WE, Mutabingwa TK, Kabyemela E, Fried M, Duffy PE. Intermittent treatment to prevent pregnancy malaria does not confer benefit in an area of widespread drug resistance. Clin Infect Dis. 2011 Aug 1;53(3):224-30. doi: 10.1093/cid/cir376.
citation: McGready R, White NJ, Nosten F. Parasitological efficacy of antimalarials in the treatment and prevention of falciparum malaria in pregnancy 1998 to 2009: a systematic review. BJOG. 2011 Jan;118(2):123-35. doi: 10.1111/j.1471-0528.2010.02810.x.
citation: Cottrell G, Moussiliou A, Luty AJ, Cot M, Fievet N, Massougbodji A, Deloron P, Tuikue Ndam N. Submicroscopic Plasmodium falciparum Infections Are Associated With Maternal Anemia, Premature Births, and Low Birth Weight. Clin Infect Dis. 2015 May 15;60(10):1481-8. doi: 10.1093/cid/civ122. Epub 2015 Feb 18.
citation: Esu E, Berens-Riha N, Pritsch M, Nwachuku N, Loescher T, Meremikwu M. Intermittent screening and treatment with artemether-lumefantrine versus intermittent preventive treatment with sulfadoxine-pyrimethamine for malaria in pregnancy: a facility-based, open-label, non-inferiority trial in Nigeria. Malar J. 2018 Jul 6;17(1):251. doi: 10.1186/s12936-018-2394-2.
citation: Das S, Jang IK, Barney B, Peck R, Rek JC, Arinaitwe E, Adrama H, Murphy M, Imwong M, Ling CL, Proux S, Haohankhunnatham W, Rist M, Seilie AM, Hanron A, Daza G, Chang M, Nakamura T, Kalnoky M, Labarre P, Murphy SC, McCarthy JS, Nosten F, Greenhouse B, Allauzen S, Domingo GJ. Performance of a High-Sensitivity Rapid Diagnostic Test for Plasmodium falciparum Malaria in Asymptomatic Individuals from Uganda and Myanmar and Naive Human Challenge Infections. Am J Trop Med Hyg. 2017 Nov;97(5):1540-1550. doi: 10.4269/ajtmh.17-0245. Epub 2017 Aug 18.
citation: Vasquez AM, Medina AC, Tobon-Castano A, Posada M, Velez GJ, Campillo A, Gonzalez IJ, Ding X. Performance of a highly sensitive rapid diagnostic test (HS-RDT) for detecting malaria in peripheral and placental blood samples from pregnant women in Colombia. PLoS One. 2018 Aug 2;13(8):e0201769. doi: 10.1371/journal.pone.0201769. eCollection 2018.
citation: Ayyoub A, Methaneethorn J, Ramharter M, Djimde AA, Tekete M, Duparc S, Borghini-Fuhrer I, Shin JS, Fleckenstein L. Population Pharmacokinetics of Pyronaridine in Pediatric Malaria Patients. Antimicrob Agents Chemother. 2015 Dec 14;60(3):1450-8. doi: 10.1128/AAC.02004-15.
citation: Croft SL, Duparc S, Arbe-Barnes SJ, Craft JC, Shin CS, Fleckenstein L, Borghini-Fuhrer I, Rim HJ. Review of pyronaridine anti-malarial properties and product characteristics. Malar J. 2012 Aug 9;11:270. doi: 10.1186/1475-2875-11-270.
citation: D'Alessandro U, Hill J, Tarning J, Pell C, Webster J, Gutman J, Sevene E. Treatment of uncomplicated and severe malaria during pregnancy. Lancet Infect Dis. 2018 Apr;18(4):e133-e146. doi: 10.1016/S1473-3099(18)30065-3. Epub 2018 Jan 31.
citation: West African Network for Clinical Trials of Antimalarial Drugs (WANECAM). Pyronaridine-artesunate or dihydroartemisinin-piperaquine versus current first-line therapies for repeated treatment of uncomplicated malaria: a randomised, multicentre, open-label, longitudinal, controlled, phase 3b/4 trial. Lancet. 2018 Apr 7;391(10128):1378-1390. doi: 10.1016/S0140-6736(18)30291-5. Epub 2018 Mar 29.