In Vivo Efficacy of Artemether-lumefantrine and Amodiaquine-artesunate in Mozambican Children (MEFI_III) (MEFI_III)

In Vivo Efficacy of Artemether-lumefantrine and Amodiaquine-artesunate for the Treatment of Uncomplicated Falciparum Malaria in Children: A Multisite Open Label, Two-cohort Clinical Trial in Mozambique

This is a classical in vivo clinical trial, following World Health organization's recommendations, ran as a multisite study within Mozambique trying to assess the efficacy and safety in 4 sites of the two oral ACTS artemether-lumefantrine (AL) and Amodiaquine-Artesunate (AQ-AS), first line treatment for malaria in mozambique, for the treatment of uncomplicated malaria in children aged<5 years.

Study Overview

• Status: Completed
• Conditions: Malaria
• Intervention / Treatment: Drug: Coartem™ (Artemether-lumefantrine combination); Drug: Winthrop™ (Amodiaquine-artesunate combination)

Detailed Description

This study followed WHO recommendations for in vivo antimalarial efficacy trials.

The study population comprised children aged 6 to 59 months with microscopically confirmed acute uncomplicated malaria. Other inclusion criteria included body weight ≥5kg, the presence of fever (≥37.5°C axillary) or a history of fever in the preceding 24 hours, P. falciparum malaria mono infection with an asexual blood density ≥2,000/µL and <200,000/µL, and the absence of severe signs of complicated malaria as defined by WHO. Key exclusion criteria included mixed malarial infections, haemoglobin <5g/dL, severe malnutrition, intake of anti-malarials within the preceding seven days, ongoing prophylaxis in HIV positive patients with cotrimoxazole or the intake of any other drug with anti-malarial activity, and any serious underlying disease. Patients satisfying the inclusion criteria were enrolled if the parent/guardian signed a detailed written informed consent.

Eligible patients were consecutively assigned to the cohort and treated with AL (cohort 1) or AQ-AS (cohort 2). AL (Coartem™) was administered twice daily for three days (six doses in total) with dosage determined according to body weight: one tablet (20mg artemether and 120mg lumefantrine) for children 5 to <15kg, two tablets per dose for those 15 to <25kg, and three tablets per dose for those 25 to <35kg. AQ-AS (Winthrop™) was administered once daily according to body weight: one 25mg artesunate and 67.5mg amodiaquine tablet in children <9kg, one 50mg artesunate and 135mg amodiaquine tablet in children 9-17.9kg; and one 100mg artesunate and 270mg amodiaquine tablet in children >18-35kg. All treatments were directly observed for a minimum of 30 minutes. Vomiting occurring within the first 30 minutes implied the repetition of the full dose of treatment. For those patients living far away from the health facilities, and for which direct observation of the evening doses of AL was challenging, admission was offered for the first three days of the study.

Antipyretics, such as paracetamol, were used to control fever>=38ºC. In the event of severe malaria or danger signs, the patient was hospitalized and received intravenous quinine, according to the national malaria treatment policy. Rescue therapy according to national malaria treatment guidelines was also administered in cases of early or late treatment failure

Follow-up visits took place on days 1, 2, 3, 7, 14, and 28 after enrolment or at any time point whenever the child was sick. Patients who prematurely discontinued either study drug or the study were excluded from the study. Vital signs and body temperature were assessed during each follow-up visit. Adverse events were recorded and assessed for severity and association with study medication.

Thick and thin Giemsa-stained blood slides were prepared before each dose was administered and at every follow-up visit of days 2, 3, 7, 14, 21 and 28. Slides were examined by two independent microscopists and considered negative if no parasites were seen after examination of 200 oil-immersion fields in a thick blood film. Species determination (and thus conformation of monoinfection) was made based on assessment of thin films. Blood samples for PCR analysis were collected from every patient at baseline and at days 7, 14 and 28, day of treatment failure or at any other unscheduled visit. PCR was performed centrally for all cases of recurrent parasitaemia from day 7 onwards to distinguish recrudescence from reinfection according to the standardized WHO method. The Molecular markers associated with suboptimal response to ACTs will be investigated.

• Study Type: Interventional
• Enrollment (Actual): 630
• Phase: Phase 4

Contacts and Locations

Study Locations

• Mozambique
  • Cabo Delgado
    • Montepuez, Cabo Delgado, Mozambique
      • Hospital Rural de Montepuez
  • Inhambane
    • Massinga, Inhambane, Mozambique
      • Hospital Distrital da Massinga
  • Maputo
    • Manhiça, Maputo, Mozambique, CP1929
      • Centro de Investigaçao em Saúde de Manhiça
    • Manhiça, Maputo, Mozambique, 1902
      • Centro de Investigaçao em Saúde de Manhiça
  • Tete
    • Moatize, Tete, Mozambique
      • Hospital Distrital de Moatize
  • Zambezia
    • Mopeia, Zambezia, Mozambique
      • Hospital Distrital de Mopeia

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 6 months to 4 years (Child)
• Accepts Healthy Volunteers: No
• Genders Eligible for Study: All

Description

Inclusion Criteria:

• Ages 6 to 59 months
• Weight Greater than or equal to 5 kg
• Absence of severe malnutrition;
• Mono-infection with Plasmodium falciparum in blood, confirmed by microscopy;
• Parasite density between 2,000 and 200,000 asexual parasites per microliter of blood;
• Axillary temperature ≥ 37.5 C° or history of fever in the last 24 hours;
• Lack of danger signs, or no signs of severe and / or complicated malaria according to the WHO definition
• Ability to swallow the drugs
• Haemoglobin greater than 5.0 g / dl
• Residents within the study area and have the possibility of an adequate follow-up in the days of monitoring for a period of 28 days;
• Absence of a history of hypersensitivity to study medications;
• Informed consent of parents, guardians or caregivers (legal guardian) after explaining the purpose of the study.

Exclusion Criteria:

• Presence of any danger sign or severe or complicated Plasmodium falciparum malaria according to WHO definitions
• Presence of fever due to diseases other than malaria (eg measles, acute respiratory infection, severe diarrhea with dehydration) or other known diseases, with chronic or serious illnesses (cardiac, renal, hepatic or known infection with HIV AIDS),
• Presence of severe malnutrition (defined as a child whose growth pattern is below the 3rd percentile, mid-upper-arm circumference <110mm, weight / height <70% according to the WHO tables, or the presence of bilateral edema of the lower limbs)
• Multi or mono-infection by another Plasmodium species detected by microscopy;
• Regular medication that may interfere with the pharmacokinetics of antimalarials;
• History of hypersensitivity or contraindication to study drug;
• A history of taking antimalarial drugs or drugs with antimalarial activity in less than 7 days.
• Continuous prophylaxis with cotrimoxazole in HIV positive children

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: Non-Randomized
• Interventional Model: Parallel Assignment
• Masking: None (Open Label)

Number of Arms

2

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Active Comparator: Artemether-Lumefantrine; 4 sites, namely Massinga, Mopeia, Moatize and Montepuez	Drug: Coartem™ (Artemether-lumefantrine combination); AL (Coartem™) was administered twice daily for three days (six doses in total) with dosage determined according to body weight: one tablet (20mg artemether and 120mg lumefantrine) for children 5 to <15kg, two tablets per dose for those 15 to <25kg, and three tablets per dose for those 25 to <35kg.
Active Comparator: Amodiaquine-Artesunate; 3 sites, namely Massinga, Mopeia and Montepuez	Drug: Winthrop™ (Amodiaquine-artesunate combination); AQ-AS (Coarsucam™) was administered once daily according to body weight: one 25mg artesunate and 67.5mg amodiaquine tablet in children <9kg, one 50mg artesunate and 135mg amodiaquine tablet in children 9-17.9kg; and one 100mg artesunate and 270mg amodiaquine tablet in children >18-35kg.

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
To measure the Day 28, PCR corrected cure rates of artemether-lumefantrine (Coartem) and Amodiaquine-artesunate (Coarsucam).	This cure rate is defined as the proportion of patients with adequate clinical and parasitological response (ACPR) at Day 28, once PCR correction to differentiate recrudescences from new infections have been applied (and hence only considering as treatment failures those parasite recurrences confirmed as recrudescences).	28 days

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
to evaluate the incidence of adverse events	Safety was assessed by administering a questionnaire about the nature and incidence of adverse events and serious adverse events. An adverse event is defined as any unfavorable, unintended sign, symptom, syndrome or disease that develops or worsens with the use of a medicinal product, regardless of whether it is related to the medicinal product.	28 days
To measure the Day PCR uncorrected cure rates of Artemether-Lumefantrine and Amodiaquine-Artesunate	This cure rate is defined as the proportion of patients with adequate clinical and parasitological response (ACPR) at Day 28, without PCR correction to differentiate recrudescences from new infections and hence considering as treatment failures all parasite recurrences.	28 days
Evaluate the presence of Molecular Markers associated with sub optimum responses to ACTs	The presence of molecular marks is defined as presence of mutations in pfk13 and pfmdr1 (at codons 86, 184 and 1246) genes identified by Sanger sequencing of pre-treatment samples.	28 days

Collaborators and Investigators

• Sponsor: Centro de Investigação em Saúde de Manhiça
• Collaborators: United States Agency for International Development (USAID)
• Investigators: Principal Investigator: Eusebio Macete, MD, PhD, Centro de Investigaçao em Saúde de Manhiça

Publications and helpful links

General Publications

• Nhama A, Nhamussua L, Macete E, Bassat Q, Salvador C, Enosse S, Candrinho B, Carvalho E, Nhacolo A, Chidimatembue A, Saifodine A, Zulliger R, Lucchi N, Svigel SS, Moriarty LF, Halsey ES, Mayor A, Aide P. In vivo efficacy and safety of artemether-lumefantrine and amodiaquine-artesunate for uncomplicated Plasmodium falciparum malaria in Mozambique, 2018. Malar J. 2021 Oct 2;20(1):390. doi: 10.1186/s12936-021-03922-9.

Study record dates

Study Major Dates

• Study Start (Actual): March 21, 2018
• Primary Completion (Actual): September 29, 2018
• Study Completion (Actual): December 19, 2019

Study Registration Dates

• First Submitted: April 9, 2020
• First Submitted That Met QC Criteria: April 30, 2020
• First Posted (Actual): May 1, 2020

Study Record Updates

• Last Update Posted (Actual): May 1, 2020
• Last Update Submitted That Met QC Criteria: April 30, 2020
• Last Verified: April 1, 2020

More Information

Terms related to this study

• Keywords: Treatment; children; Artemisine-based combinations
• Additional Relevant MeSH Terms: Infections; Vector Borne Diseases; Parasitic Diseases; Protozoan Infections; Malaria; Anti-Infective Agents; Antiviral Agents; Antineoplastic Agents; Antiprotozoal Agents; Antiparasitic Agents; Antimalarials; Anthelmintics; Schistosomicides; Antiplatyhelmintic Agents; Lumefantrine; Artemether; Artesunate; Artemether, Lumefantrine Drug Combination; Amodiaquine
• Other Study ID Numbers: 516/CNBS/2017

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No