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| Name | Class |
|---|---|
| The Swedish Research Council | OTHER_GOV |
| Uppsala University | OTHER |
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Background: Artemisinin resistance has emerged in parts of Southeast Asia, and there are reports in Africa of reduced susceptibility of Plasmodium falciparum parasites against artemisinin-based combination therapy (ACT). No new drugs are available in the pipeline to replace ACTs in case they fail.
This study aims to assess whether a sequential administration of triple ACTs with different partner-drugs can improve the efficacy of ACT for treatment of uncomplicated malaria.
Methods: A health facility-based, three-arm partially blinded randomized clinical trial will be conducted to assess efficacy and safety of a sequential administration of artemether-lumefantrine followed immediately by artesunate-amodiaquine (AL+ASAQ) or artemether-lumefantrine with by amodiaquine (AL+AQ) compared to artemether-lumefantrine plus placebo (AL+PBO). Eligible children aged 6 - 120 months and with microscopy confirmed uncomplicated P. falciparum malaria will be enrolled, administered with trial medicines and followed-up at 0 (just prior to first drug intake) and 8 hours on day 0, 12 hourly on days 1, 2, 3, 4, 5, followed by once daily on days 6, 7, 8, 9, 10, 11, 12, 13, 14, 21, 28, 35, 42 and 56 for clinical and laboratory evaluations. Clinical evaluation will involve assessment of signs and symptoms related to the disease and or trial medicine during follow-up. Laboratory evaluation will include microscopic determination of presence of malaria parasites and species, hemoglobin level, molecular analysis for markers of drug resistance and to differentiate recrudescence from new infection. The primary outcome will be Polymerase Chain Reaction (PCR)-adjusted adequate clinical and parasitological cure rate on days 28 and 42.
Expected outcomes: The findings will give an insight on whether 3 ACTs are more efficacious than the use of first-line regimen alone, and are tolerable for treatment of uncomplicated falciparum malaria.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Artemether-lumefantrine followed by artesunate amodiaquine | Experimental | a standard 3-days dosage, twice a day course of Artemether-Lumefantrine (20/120mg) immediately followed by a standard 3-days, once a day course of Artesunate-Amodiaquine (40base) |
|
| Artemether-lumefantrine with Amodiaquine | Experimental | a standard 3-days dosage of Artemether-Lumefantrine (20/120mg) given together with Amodiaquine hydrocloride(40 base) followed by placebo for another 3 days; |
|
| Artemether-Lumefantrine alone | Active Comparator | a standard 3-days dosage of Artemether-Lumefantrine (20/120mg) followed by placebo for another 3 days |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Artemether-lumefantrine and Amodiaquine Drug Combination | Drug | AL and AQ will be given together for three days then followed by placebo for three days |
|
| Measure | Description | Time Frame |
|---|---|---|
| Crude recurrent parasitemia by day 56 in the respective arms | Laboratory assessment of parasitemia using light microscopy performed at last day of follow up will be the primary outcome assessing the differences in proportion of patients with recurrent parasitemia. | 56th day since enrolment |
| Measure | Description | Time Frame |
|---|---|---|
| PCR adjusted cure rates by day 28, 42 and 56. | Assessment of cure rate as determined by parasitemia to distinguish recrudescence and reinfections | Through study completion, an average of 1 year |
| Measure | Description | Time Frame |
|---|---|---|
| Median time to recurrent parasitemia by microscopy | This outcome compares across the three arms how long it takes until patients return with parasitemia. It will provide information on the post treatment prophylaxis of each arm. | 56 days since enrolment |
| PCR determined parasite clearance times |
Patients presenting at the health facility with suspected acute uncomplicated malaria will be screened for eligibility.
Inclusion Criteria:
Exclusion Criteria:
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| Name | Role | Phone | Extension | |
|---|---|---|---|---|
| Lwidiko E Mhamilawa, PhD | Contact | +255712865206 | lwidikoedward@gmail.com | |
| Billy E Ngasala, PhD | Contact | +255 754 316 359 | bngasala70@yahoo.co.uk |
| Name | Affiliation | Role |
|---|---|---|
| Billy E Ngasala, PhD | Muhimbili University of Health and Allied Sciences | Principal Investigator |
| Andreas MÃ¥rtensson, PhD | Muhimbili University of Health and Allied Sciences | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Kibindu | Recruiting | Bagamoyo | Dar esSalaam | 255 | Tanzania |
| PubMed Identifier | Type | Citation | Retractions |
|---|---|---|---|
| 28838305 | Background | Holmstrom O, Linder N, Ngasala B, Martensson A, Linder E, Lundin M, Moilanen H, Suutala A, Diwan V, Lundin J. Point-of-care mobile digital microscopy and deep learning for the detection of soil-transmitted helminths and Schistosoma haematobium. Glob Health Action. 2017 Jun;10(sup3):1337325. doi: 10.1080/16549716.2017.1337325. | |
| 29602751 |
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A health facility-based, three-arm partially blinded randomized clinical trial will be conducted to assess efficacy and safety of a sequential administration of artemether-lumefantrine followed immediately by artesunate-amodiaquine (AL+ASAQ) or artemether-lumefantrine with by amodiaquine (AL+AQ) compared to artemether-lumefantrine plus placebo (AL+PBO).
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|
| Artemether-lumefantrine then Artesunate amodiaquine | Drug | AL will be given twice a day for three days then followed by artesunate amodiaquine once a day for three days |
|
|
| Artemether-lumefantrine | Drug | This will be the comparator arm as standard treatment, where only AL will be given twice a day for three days then placebo for three days |
|
|
PCR determined parasite clearance times are determined by using PCR to measure the amount of parasite DNA in the patient's blood at various time points after treatment. The parasite clearance time is then calculated as the time it takes for the amount of parasite DNA to fall below a certain threshold level, indicating that the parasite has been cleared from the patient's blood. |
| Baseline to day 3 |
| Maximum plasma concentrations (Cmax) of the intervention drugs. | The Pharmacokinetics profiles of artesunate/dihydroartemisinin, lumefantrine/desbutyl-lumefantrine and amodiaquine/desethyl-amodiaquine will be assessed, focusing on Plasma concentrations to determine Cmax. | Baseline and Day 7 |
| Change in hemoglobin level (g/dl) | Haemoglobin concentration will be measured at baseline day 0 on day 7 to determine whether patients are anemic or not. . Anemia will be categorized as mild (Hb < 11 g/dL), moderate (< 7 g/dL) or severe (Hb < 5 g/dL). | Baseline and day 7 |
| Proportion of Microscopy determined gametocyte carriage | Assessment of how many patients in each treatment arm harbour gametocytes | Baseline and day 3 |
| Prevalence of genetic markers of drug resistance. | Selection of genetic markers of drug resistance among recurrent parasitemia during follow-up and during the early treatment phase. The markers will include P. falciparum chloroquine resistance transporter gene (Pfcrt), and P. falciparum multidrug resistance gene 1 (Pfmdr1) for lumefantrine and amodiaquine; P. falciparum multidrug resistance proteins, the sarco/endoplasmic reticulum Ca2+-ATPase orthologue of P. falciparum (pfatp6), and P. falciparum kelch propeller gene 13 (PfKelch13) for artemisinin; and plasmepsin 2 and 3 for piperaquine. | Through study completion, an average of 1 year |
| Yombo Dispensary | Suspended | Bagamoyo | Yombo | +255 | Tanzania |
| Smit MR, Ochomo EO, Aljayyoussi G, Kwambai TK, Abong'o BO, Chen T, Bousema T, Slater HC, Waterhouse D, Bayoh NM, Gimnig JE, Samuels AM, Desai MR, Phillips-Howard PA, Kariuki SK, Wang D, Ward SA, Ter Kuile FO. Safety and mosquitocidal efficacy of high-dose ivermectin when co-administered with dihydroartemisinin-piperaquine in Kenyan adults with uncomplicated malaria (IVERMAL): a randomised, double-blind, placebo-controlled trial. Lancet Infect Dis. 2018 Jun;18(6):615-626. doi: 10.1016/S1473-3099(18)30163-4. Epub 2018 Mar 27. |
| 19641202 | Background | Dondorp AM, Nosten F, Yi P, Das D, Phyo AP, Tarning J, Lwin KM, Ariey F, Hanpithakpong W, Lee SJ, Ringwald P, Silamut K, Imwong M, Chotivanich K, Lim P, Herdman T, An SS, Yeung S, Singhasivanon P, Day NP, Lindegardh N, Socheat D, White NJ. Artemisinin resistance in Plasmodium falciparum malaria. N Engl J Med. 2009 Jul 30;361(5):455-67. doi: 10.1056/NEJMoa0808859. |
| 26014949 | Background | Leang R, Taylor WR, Bouth DM, Song L, Tarning J, Char MC, Kim S, Witkowski B, Duru V, Domergue A, Khim N, Ringwald P, Menard D. Evidence of Plasmodium falciparum Malaria Multidrug Resistance to Artemisinin and Piperaquine in Western Cambodia: Dihydroartemisinin-Piperaquine Open-Label Multicenter Clinical Assessment. Antimicrob Agents Chemother. 2015 Aug;59(8):4719-26. doi: 10.1128/AAC.00835-15. Epub 2015 May 26. |
| 28829723 | Background | Mwaiswelo R, Ngasala B, Gil JP, Malmberg M, Jovel I, Xu W, Premji Z, Mmbando BP, Bjorkman A, Martensson A. Sustained High Cure Rate of Artemether-Lumefantrine against Uncomplicated Plasmodium falciparum Malaria after 8 Years of Its Wide-Scale Use in Bagamoyo District, Tanzania. Am J Trop Med Hyg. 2017 Aug;97(2):526-532. doi: 10.4269/ajtmh.16-0780. |
| 30860013 | Background | Mwaiswelo R, Ngasala B, Jovel I, Xu W, Larsson E, Malmberg M, Gil JP, Premji Z, Mmbando BP, Martensson A. Prevalence of and Risk Factors Associated with Polymerase Chain Reaction-Determined Plasmodium falciparum Positivity on Day 3 after Initiation of Artemether-Lumefantrine Treatment for Uncomplicated Malaria in Bagamoyo District, Tanzania. Am J Trop Med Hyg. 2019 May;100(5):1179-1186. doi: 10.4269/ajtmh.18-0729. |
| ID | Term |
|---|---|
| D016778 | Malaria, Falciparum |
| ID | Term |
|---|---|
| D008288 | Malaria |
| D011528 | Protozoan Infections |
| D010272 | Parasitic Diseases |
| D007239 | Infections |
| D000096724 | Mosquito-Borne Diseases |
| D000079426 | Vector Borne Diseases |
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| ID | Term |
|---|---|
| D000077611 | Artemether, Lumefantrine Drug Combination |
| ID | Term |
|---|---|
| D000077549 | Artemether |
| D037621 | Artemisinins |
| D017382 | Reactive Oxygen Species |
| D005609 | Free Radicals |
| D007287 | Inorganic Chemicals |
| D009930 | Organic Chemicals |
| D000078102 | Lumefantrine |
| D005449 | Fluorenes |
| D011084 | Polycyclic Aromatic Hydrocarbons |
| D006841 | Hydrocarbons, Aromatic |
| D006844 | Hydrocarbons, Cyclic |
| D006838 | Hydrocarbons |
| D012717 | Sesquiterpenes |
| D013729 | Terpenes |
| D011083 | Polycyclic Compounds |
| D004338 | Drug Combinations |
| D004364 | Pharmaceutical Preparations |
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