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Antón-Berenguer V, Cabrera-Rodrigo I, Valle-Borrego B, Ligero-López J, Merino-Fernández FJ, Gómez-de-Frutos S, Rubio JM. Imported malaria in a non-endemic country: sixteen years of cases in a hospital in the South of Madrid, Spain. Eur J Clin Microbiol Infect Dis 2024:10.1007/s10096-024-04938-0. [PMID: 39287796 DOI: 10.1007/s10096-024-04938-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2024] [Accepted: 09/04/2024] [Indexed: 09/19/2024]
Abstract
PURPOSE Malaria keeps on being a serious global health threat, especially in many tropical countries, where it is endemic. Also in non-endemic countries, like Spain, malaria is an issue that requires attention due to the presence of imported cases. METHODS This is a retrospective study, including all patients diagnosed with malaria at Severo Ochoa University Hospital from 2006 to 2022, being classified according to: (I) their type of stay in an endemic area as visiting friends and relatives (VFR), migrants of recent arrival (MRA), or tourism and business (T&B), and (II) the mode of presentation as microscopic (MM) or submicroscopic (SMM) malaria. RESULTS In this study, 132 patients (23.7% of all suspected) were diagnosed with malaria. The PCR was the most sensitive technique (99.2%), followed by antigen detection (78.8%) and microscopy (75%), with Plasmodium falciparum being the predominant species (94.7%). VFR was the largest group infected with malaria (69.7%), mostly symptomatic (98.2%) and presenting MM (90.2%). Instead, MRA patients (25%) presented milder (47.4%) or no symptoms (31.6%) and higher cases of SMM (42.4%). Coinfection with another imported pathogen was present in 19 patients (14.4%), being MRA more frequently coinfected (30.3%) CONCLUSION: This study shows the need for establishing systems for VFRs to attend pre-travel consultations to reduce malaria imported risk. In the case of MRA, screening for imported diseases should be conducted upon their arrival. Finally, we highlight two cases of co-infection with imported viruses, showing that presence of symptoms resembling malaria from another imported pathogen does not exclude malaria.
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Affiliation(s)
- Víctor Antón-Berenguer
- Severo Ochoa University Hospital, Avenida de Orellana s/n Leganés, Madrid, 28911, Spain
- Malaria & Emerging Parasitic Diseases Laboratory, Parasitology Department, National Centre of Microbiology. Instituto de Salud Carlos III, Cra. Majadahonda Pozuelo Km.2, Majadahonda, Madrid, 28220, Spain
| | - Irene Cabrera-Rodrigo
- Severo Ochoa University Hospital, Avenida de Orellana s/n Leganés, Madrid, 28911, Spain
- Faculty of Medicine, Alfonso X el Sabio University, Madrid, Spain
| | - Beatriz Valle-Borrego
- Severo Ochoa University Hospital, Avenida de Orellana s/n Leganés, Madrid, 28911, Spain
- Faculty of Medicine, Alfonso X el Sabio University, Madrid, Spain
| | - Jorge Ligero-López
- Severo Ochoa University Hospital, Avenida de Orellana s/n Leganés, Madrid, 28911, Spain
- Department of Microbiology, Faculty of Medicine, Paediatrics, Radiology and Public Health, Zaragoza University, Zaragoza, Spain
| | - Francisco J Merino-Fernández
- Severo Ochoa University Hospital, Avenida de Orellana s/n Leganés, Madrid, 28911, Spain
- Faculty of Medicine, Alfonso X el Sabio University, Madrid, Spain
| | - Sara Gómez-de-Frutos
- Severo Ochoa University Hospital, Avenida de Orellana s/n Leganés, Madrid, 28911, Spain
| | - José Miguel Rubio
- Malaria & Emerging Parasitic Diseases Laboratory, Parasitology Department, National Centre of Microbiology. Instituto de Salud Carlos III, Cra. Majadahonda Pozuelo Km.2, Majadahonda, Madrid, 28220, Spain.
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Oduor CI, Connelly SV, Cunningham C, Rustamzade N, Zuromski J, Chin DM, Nixon C, Kurtis J, Juliano JJ, Bailey JA. Single cell transcriptional changes across the blood stages of artemisinin resistant K13 580Y Plasmodium falciparum upon dihydroartemisinin exposure. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2023.12.06.570387. [PMID: 38105992 PMCID: PMC10723473 DOI: 10.1101/2023.12.06.570387] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2023]
Abstract
Artemisinins have been a cornerstone of malaria control, but resistance in Plasmodium falciparum, due to mutations in the Kelch13 (K13) protein, threaten these advances. Artemisinin exposure results in a dynamic transcriptional response across multiple pathways, but most work has focused on ring stages and ex vivo transcriptional analysis. We applied single cell RNAseq to two unsynchronized coisogenic parasite lines (K13C580 and K13580Y) over 6 hrs after a pulse exposure to dihydroartemisinin (DHA). Transcription was altered across all stages, with the greatest occurring at the trophozoite and ring stage in both lines. This response involved the arrest of metabolic processes, support for a dormancy phenomenon upon treatment, and the enhancement of protein trafficking and the unfolded protein response. While similar, the response was consistent across stages in K13580Y, with enhanced parasite survival to drug induced stress. Increased surface protein expression was seen in K13580Y parasites at baseline and upon drug exposure, highlighted by the increased expression of PfEMP1 and GARP, a potential therapeutic target. Antibody targeting GARP maintained anti-parasitic efficacy in K13580Y parasites. This work provides single cell insight of gene transcription across all life cycle stages revealing transcriptional changes that could initiate a dormancy state and mediate survival upon treatment.
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Affiliation(s)
- Cliff I. Oduor
- Department of Pathology and Laboratory Medicine, Brown University, Providence, RI
| | - Sean V. Connelly
- Division of Infectious Diseases, Department of Medicine, University of North Carolina, Chapel Hill, NC
| | - Clark Cunningham
- Division of Infectious Diseases, Department of Medicine, University of North Carolina, Chapel Hill, NC
| | - Nazrin Rustamzade
- Department of Pathology and Laboratory Medicine, Brown University, Providence, RI
| | - Jenna Zuromski
- Department of Pathology and Laboratory Medicine, Brown University, Providence, RI
| | - Deborah M. Chin
- Department of Pathology and Laboratory Medicine, Brown University, Providence, RI
| | - Chris Nixon
- Department of Pathology and Laboratory Medicine, Brown University, Providence, RI
| | - Jonathan Kurtis
- Department of Pathology and Laboratory Medicine, Brown University, Providence, RI
| | - Jonathan J. Juliano
- Division of Infectious Diseases, Department of Medicine, University of North Carolina, Chapel Hill, NC
- Curriculum in Genetics and Molecular Biology, School of Medicine, University of North Carolina, Chapel Hill, NC
- Department of Epidemiology, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, NC
| | - Jeffrey A Bailey
- Department of Pathology and Laboratory Medicine, Brown University, Providence, RI
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Ogwang R, Osoti V, Wamae K, Ndwiga L, Muteru K, Ningwa A, Tuju J, Kinyanjui S, Osier F, Marsh K, Bejon P, Idro R, Ochola-Oyier LI. A retrospective analysis of P. falciparum drug resistance markers detects an early (2016/17) high prevalence of the k13 C469Y mutation in asymptomatic infections in Northern Uganda. Antimicrob Agents Chemother 2024; 68:e0157623. [PMID: 39136465 PMCID: PMC11382623 DOI: 10.1128/aac.01576-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2023] [Accepted: 07/20/2024] [Indexed: 09/05/2024] Open
Abstract
The emergence of drug-resistant Plasmodium falciparum parasites in sub-Saharan Africa will substantially challenge malaria control. Here, we evaluated the frequency of common drug resistance markers among adolescents from Northern Uganda with asymptomatic infections. We used an established amplicon deep sequencing strategy to screen dried blood spot samples collected from 2016 to 2017 during a reported malaria epidemic within the districts of Kitgum and Pader in Northern Uganda. We screened single-nucleotide polymorphisms within: kelch13 (Pfk13), dihydropteroate synthase (Pfdhps), multidrug resistance-1 (Pfmdr1), dihydrofolate reductase (Pfdhfr), and apical membrane antigen (Pfama1) genes. Within the study population, the median age was 15 years (14.3-15.0, 95% CI), and 54.9% (78/142) were Plasmodium positive by 18S rRNA qPCR, which were subsequently targeted for sequencing analysis. We observed a high frequency of resistance markers particularly for sulfadoxine-pyrimethamine (SP), with no wild-type-only parasites observed for Pfdhfr (N51I, C59R, and S108N) and Pfdhps (A437G and K540E) mutations. Within Pfmdr1, mixed infections were common for NF/NY (98.5%). While for artemisinin resistance, in kelch13, there was a high frequency of C469Y (34%). Using the pattern for Pfama1, we found a high level of polygenomic infections with all individuals presenting with complexity of infection greater than 2 with a median of 6.9. The high frequency of the quintuple SP drug-resistant parasites and the C469Y artemisinin resistance-associated mutation in asymptomatic individuals suggests an earlier high prevalence than previously reported from symptomatic malaria surveillance studies (in 2016/2017). Our data demonstrate the urgency for routine genomic surveillance programs throughout Africa and the value of deep sequencing.
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Affiliation(s)
- Rodney Ogwang
- Centre for Geographic Medicine Research (Coast), Kenya Medical Research Institute-Wellcome Trust Research Programme, Kilifi, Kenya
- Makerere University College of Health Sciences, Kampala, Uganda
- Centre of Tropical Neuroscience (CTN), Kitgum Site, Uganda
| | - Victor Osoti
- Centre for Geographic Medicine Research (Coast), Kenya Medical Research Institute-Wellcome Trust Research Programme, Kilifi, Kenya
| | - Kevin Wamae
- Centre for Geographic Medicine Research (Coast), Kenya Medical Research Institute-Wellcome Trust Research Programme, Kilifi, Kenya
| | - Leonard Ndwiga
- Centre for Geographic Medicine Research (Coast), Kenya Medical Research Institute-Wellcome Trust Research Programme, Kilifi, Kenya
| | - Kelvin Muteru
- Centre for Geographic Medicine Research (Coast), Kenya Medical Research Institute-Wellcome Trust Research Programme, Kilifi, Kenya
| | - Albert Ningwa
- Makerere University College of Health Sciences, Kampala, Uganda
- Centre of Tropical Neuroscience (CTN), Kitgum Site, Uganda
| | - James Tuju
- Centre for Geographic Medicine Research (Coast), Kenya Medical Research Institute-Wellcome Trust Research Programme, Kilifi, Kenya
| | - Sam Kinyanjui
- Centre for Geographic Medicine Research (Coast), Kenya Medical Research Institute-Wellcome Trust Research Programme, Kilifi, Kenya
| | - Faith Osier
- Centre for Geographic Medicine Research (Coast), Kenya Medical Research Institute-Wellcome Trust Research Programme, Kilifi, Kenya
- Department of Life Sciences, Imperial College London, London, United Kingdom
| | - Kevin Marsh
- Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, University of Oxford, Oxford, United Kingdom
| | - Philip Bejon
- Centre for Geographic Medicine Research (Coast), Kenya Medical Research Institute-Wellcome Trust Research Programme, Kilifi, Kenya
| | - Richard Idro
- Makerere University College of Health Sciences, Kampala, Uganda
- Centre of Tropical Neuroscience (CTN), Kitgum Site, Uganda
- Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, University of Oxford, Oxford, United Kingdom
| | - Lynette Isabella Ochola-Oyier
- Centre for Geographic Medicine Research (Coast), Kenya Medical Research Institute-Wellcome Trust Research Programme, Kilifi, Kenya
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Okore W, Ouma C, Okoth RO, Yeda R, Ingasia LO, Mwakio EW, Ochora DO, Wakoli DM, Amwoma JG, Chemwor GC, Juma JA, Okudo CO, Cheruiyot AC, Opot BH, Juma D, Egbo TE, Andagalu B, Roth A, Kamau E, Akala HM. Increased sensitivity of malaria parasites to common antimalaria drugs after the introduction of artemether-lumefantrine: Implication of policy change and implementation of more effective drugs in fight against malaria. PLoS One 2024; 19:e0298585. [PMID: 38900782 PMCID: PMC11189199 DOI: 10.1371/journal.pone.0298585] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2023] [Accepted: 01/28/2024] [Indexed: 06/22/2024] Open
Abstract
Single nucleotide polymorphisms (SNPs) in the Plasmodium falciparum multi-drug resistance protein 1 (Pfmrp1) gene have previously been reported to confer resistance to Artemisinin-based Combination Therapies (ACTs) in Southeast Asia. A total of 300 samples collected from six sites between 2008 and 2019 under an ongoing malaria drug sensitivity patterns in Kenya study were evaluated for the presence of SNPs at Pfmrp1 gene codons: H191Y, S437A, I876V, and F1390I using the Agena MassARRAY® platform. Each isolate was further tested against artemisinin (ART), lumefantrine (LU), amodiaquine (AQ), mefloquine (MQ), quinine (QN), and chloroquine (CQ) using malaria the SYBR Green I-based method to determine their in vitro drug sensitivity. Of the samples genotyped, polymorphism at Pfmrp1 codon I876V was the most frequent, with 59.3% (163/275) mutants, followed by F1390I, 7.2% (20/278), H191Y, 4.0% (6/151), and S437A, 3.3% (9/274). A significant decrease in median 50% inhibition concentrations (IC50s) and interquartile range (IQR) was noted; AQ from 2.996 ng/ml [IQR = 2.604-4.747, n = 51] in 2008 to 1.495 ng/ml [IQR = 0.7134-3.318, n = 40] (P<0.001) in 2019, QN from 59.64 ng/ml [IQR = 29.88-80.89, n = 51] in 2008 to 18.10 ng/ml [IQR = 11.81-26.92, n = 42] (P<0.001) in 2019, CQ from 35.19 ng/ml [IQR = 16.99-71.20, n = 30] in 2008 to 6.699 ng/ml [IQR = 4.976-9.875, n = 37] (P<0.001) in 2019, and ART from 2.680 ng/ml [IQR = 1.608-4.857, n = 57] in 2008 to 2.105 ng/ml [IQR = 1.266-3.267, n = 47] (P = 0.0012) in 2019, implying increasing parasite sensitivity to the drugs over time. However, no significant variations were observed in LU (P = 0.2692) and MQ (P = 0.0939) respectively, suggesting stable parasite responses over time. There was no statistical significance between the mutation at 876 and parasite sensitivity to selected antimalarials tested, suggesting stable sensitivity for the parasites with 876V mutations. These findings show that Kenyan parasite strains are still sensitive to AQ, QN, CQ, ART, LU, and MQ. Despite the presence of Pfmrp1 mutations in parasites among the population.
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Affiliation(s)
- Winnie Okore
- Department of Emerging and Infectious Diseases (DEID), United States Army Medical Research Directorate-Africa (USAMRD-A), Kenya Medical Research Institute (KEMRI)/Walter Reed Project (WRP), Kisumu, Kenya
- Department of Biomedical Sciences and Technology, Maseno University, Kisumu, Kenya
| | - Collins Ouma
- Department of Biomedical Sciences and Technology, Maseno University, Kisumu, Kenya
| | - Raphael O. Okoth
- Department of Emerging and Infectious Diseases (DEID), United States Army Medical Research Directorate-Africa (USAMRD-A), Kenya Medical Research Institute (KEMRI)/Walter Reed Project (WRP), Kisumu, Kenya
| | - Redemptah Yeda
- Department of Emerging and Infectious Diseases (DEID), United States Army Medical Research Directorate-Africa (USAMRD-A), Kenya Medical Research Institute (KEMRI)/Walter Reed Project (WRP), Kisumu, Kenya
| | - Luicer O. Ingasia
- Sydney Brenner Institute of Molecular Biosciences, University of Witwatersrand, Johannesburg, South Africa
| | - Edwin W. Mwakio
- Department of Emerging and Infectious Diseases (DEID), United States Army Medical Research Directorate-Africa (USAMRD-A), Kenya Medical Research Institute (KEMRI)/Walter Reed Project (WRP), Kisumu, Kenya
| | - Douglas O. Ochora
- Department of Emerging and Infectious Diseases (DEID), United States Army Medical Research Directorate-Africa (USAMRD-A), Kenya Medical Research Institute (KEMRI)/Walter Reed Project (WRP), Kisumu, Kenya
- Department of Biological Sciences, Kisii University, Kisii, Kenya
| | - Duncan M. Wakoli
- Department of Emerging and Infectious Diseases (DEID), United States Army Medical Research Directorate-Africa (USAMRD-A), Kenya Medical Research Institute (KEMRI)/Walter Reed Project (WRP), Kisumu, Kenya
- Department of Biochemistry and Molecular Biology, Egerton University, Njoro, Kenya
| | - Joseph G. Amwoma
- Department of Emerging and Infectious Diseases (DEID), United States Army Medical Research Directorate-Africa (USAMRD-A), Kenya Medical Research Institute (KEMRI)/Walter Reed Project (WRP), Kisumu, Kenya
- Department of Biological Sciences, University of Embu, Embu, Kenya
| | - Gladys C. Chemwor
- Department of Emerging and Infectious Diseases (DEID), United States Army Medical Research Directorate-Africa (USAMRD-A), Kenya Medical Research Institute (KEMRI)/Walter Reed Project (WRP), Kisumu, Kenya
| | - Jackline A. Juma
- Department of Emerging and Infectious Diseases (DEID), United States Army Medical Research Directorate-Africa (USAMRD-A), Kenya Medical Research Institute (KEMRI)/Walter Reed Project (WRP), Kisumu, Kenya
| | - Charles O. Okudo
- Department of Emerging and Infectious Diseases (DEID), United States Army Medical Research Directorate-Africa (USAMRD-A), Kenya Medical Research Institute (KEMRI)/Walter Reed Project (WRP), Kisumu, Kenya
| | - Agnes C. Cheruiyot
- Department of Emerging and Infectious Diseases (DEID), United States Army Medical Research Directorate-Africa (USAMRD-A), Kenya Medical Research Institute (KEMRI)/Walter Reed Project (WRP), Kisumu, Kenya
| | - Benjamin H. Opot
- Department of Emerging and Infectious Diseases (DEID), United States Army Medical Research Directorate-Africa (USAMRD-A), Kenya Medical Research Institute (KEMRI)/Walter Reed Project (WRP), Kisumu, Kenya
| | - Dennis Juma
- Department of Emerging and Infectious Diseases (DEID), United States Army Medical Research Directorate-Africa (USAMRD-A), Kenya Medical Research Institute (KEMRI)/Walter Reed Project (WRP), Kisumu, Kenya
| | - Timothy E. Egbo
- United States Army Medical Research Directorate-Africa (USAMRD-A), Kisumu, Kenya
| | - Ben Andagalu
- Department of Emerging and Infectious Diseases (DEID), United States Army Medical Research Directorate-Africa (USAMRD-A), Kenya Medical Research Institute (KEMRI)/Walter Reed Project (WRP), Kisumu, Kenya
| | - Amanda Roth
- Medical Communications for Combat Casualty Care, Fort Detrick, Maryland, United States of America
| | - Edwin Kamau
- Department of Pathology and Area Laboratory Services, Tripler Army Medical Center, Honolulu, Honolulu, United States of America
| | - Hoseah M. Akala
- Department of Emerging and Infectious Diseases (DEID), United States Army Medical Research Directorate-Africa (USAMRD-A), Kenya Medical Research Institute (KEMRI)/Walter Reed Project (WRP), Kisumu, Kenya
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Fola AA, Kobayashi T, Shields T, Hamapumbu H, Musonda M, Katowa B, Matoba J, Stevenson JC, Norris DE, Thuma PE, Wesolowski A, Moss WJ, Juliano JJ, Bailey JA. Temporal genomic analysis of Plasmodium falciparum reveals increased prevalence of mutations associated with delayed clearance following treatment with artemisinin-lumefantrine in Choma District, Southern Province, Zambia. MEDRXIV : THE PREPRINT SERVER FOR HEALTH SCIENCES 2024:2024.06.05.24308497. [PMID: 38883763 PMCID: PMC11178023 DOI: 10.1101/2024.06.05.24308497] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2024]
Abstract
The emergence of antimalarial drug resistance is an impediment to malaria control and elimination in Africa. Analysis of temporal trends in molecular markers of resistance is critical to inform policy makers and guide malaria treatment guidelines. In a low and seasonal transmission region of southern Zambia, we successfully genotyped 85.5% (389/455) of Plasmodium falciparum samples collected between 2013-2018 from 8 spatially clustered health centres using molecular inversion probes (MIPs) targeting key drug resistance genes. Aside from one sample carrying K13 R622I, none of the isolates carried other World Health Organization-validated or candidate artemisinin partial resistance (ART-R) mutations in K13. However, 13% (CI, 9.6-17.2) of isolates had the AP2MU S160N mutation, which has been associated with delayed clearance following artemisinin combination therapy in Africa. This mutation increased in prevalence between 2015-2018 and bears a genomic signature of selection. During this time period, there was an increase in the MDR1 NFD haplotype that is associated with reduced susceptibility to lumefantrine. Sulfadoxine-pyrimethamine polymorphisms were near fixation. While validated ART-R mutations are rare, a mutation associated with slow parasite clearance in Africa appears to be under selection in southern Zambia.
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Affiliation(s)
- Abebe A. Fola
- Department of Pathology and Laboratory Medicine, Brown University, RI, USA, 02906
| | - Tamaki Kobayashi
- Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA, 21205
| | - Timothy Shields
- Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA, 21205
| | | | | | - Ben Katowa
- Macha Research Trust, Choma District, Zambia
| | | | | | - Douglas E. Norris
- Johns Hopkins Malaria Research Institute, Department of Molecular Microbiology and Immunology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA, 21205
| | | | - Amy Wesolowski
- Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA, 21205
| | - William J. Moss
- Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA, 21205
- Johns Hopkins Malaria Research Institute, Department of Molecular Microbiology and Immunology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA, 21205
| | - Jonathan J. Juliano
- Institute for Global Health and Infectious Diseases, University of North Carolina Chapel Hill, NC, USA, 27599
- Division of Infectious Diseases, School of Medicine, University of North Carolina Chapel Hill, Chapel Hill, NC 27599
- Department of Epidemiology, Gillings School of Global Public Health, University of North Carolina Chapel Hill, Chapel Hill, NC, USA, 27599
- Curriculum in Genetics and Molecular Biology, School of Medicine, University of North Carolina Chapel Hill, Chapel Hill, NC 27599
| | - Jeffrey A. Bailey
- Department of Pathology and Laboratory Medicine, Brown University, RI, USA, 02906
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Borgohain P, Shakya A, Ghosh SK, Gogoi N, Patgiri SJ, Bhowmick IP, Bhattacharyya DR, Singh UP, Bhat HR. Design, in silico study, synthesis and evaluation of hybrid pyrazole substituted 1,3,5-triazine derivatives for antimalarial activity. Exp Parasitol 2024; 261:108767. [PMID: 38679125 DOI: 10.1016/j.exppara.2024.108767] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2023] [Revised: 04/17/2024] [Accepted: 04/25/2024] [Indexed: 05/01/2024]
Abstract
OBJECTIVES Malaria is a significant global health challenge, particularly in Africa, Asia, and Latin America, necessitating immediate investigation into innovative and efficacious treatments. This work involves the development of pyrazole substituted 1,3,5-triazine derivatives as antimalarial agent. METHODS In this study, ten compounds 7(a-j) were synthesized by using nucleophilic substitution reaction, screened for in silico study and their antimalarial activity were evaluated against 3D7 (chloroquine-sensitive) strain of P. falciparum. KEY FINDING The present work involves the development of hybrid trimethoxy pyrazole 1,3,5-triazine derivatives 7 (a-j). Through in silico analysis, four compounds were identified with favorable binding energy and dock scores. The primary focus of the docking investigations was on the examination of hydrogen bonding and the associated interactions with certain amino acid residues, including Arg A122, Ser A108, Ser A111, Ile A164, Asp A54, and Cys A15. The IC50 values of the four compounds were measured in vitro to assess their antimalarial activity against the chloroquine sensitive 3D7 strain of P. falciparum. The IC50 values varied from 25.02 to 54.82 μg/mL. CONCLUSION Among the ten derivatives, compound 7J has considerable potential as an antimalarial agent, making it a viable contender for further refinement in the realm of pharmaceutical exploration, with the aim of mitigating the global malaria load.
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Affiliation(s)
- Pritom Borgohain
- Department of Pharmaceutical Sciences, Dibrugarh University, Dibrugarh, 786004, India
| | - Anshul Shakya
- Department of Pharmaceutical Sciences, Dibrugarh University, Dibrugarh, 786004, India
| | - Surajit Kumar Ghosh
- Department of Pharmaceutical Sciences, Dibrugarh University, Dibrugarh, 786004, India
| | - Neelutpal Gogoi
- Department of Pharmaceutical Sciences, Dibrugarh University, Dibrugarh, 786004, India
| | - Saurav Jyoti Patgiri
- Regional Medical Research Centre, Indian Council of Medical Research (ICMR), Dibrugarh, 786001, Assam, India
| | - Ipsita Pal Bhowmick
- Regional Medical Research Centre, Indian Council of Medical Research (ICMR), Dibrugarh, 786001, Assam, India
| | - Dibya Ranjan Bhattacharyya
- Regional Medical Research Centre, Indian Council of Medical Research (ICMR), Dibrugarh, 786001, Assam, India
| | - Udaya Pratap Singh
- Drug Design and Discovery Laboratory, Department of Pharmaceutical Sciences, Sam Higginbottom University of Agriculture Technology and Sciences, Allahabad, 211007, India
| | - Hans Raj Bhat
- Department of Pharmaceutical Sciences, Dibrugarh University, Dibrugarh, 786004, India.
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7
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Amador LA, Colón-Lorenzo EE, Rodríguez AD, Serrano AE. Probing the Antiplasmodial Properties of Plakortinic Acids C and D: An Uncommon Pair of Marine Peroxide-Polyketides Isolated from a Two-Sponge Association of Plakortis symbiotica and Xetospongia deweerdtae Collected near Puerto Rico. Life (Basel) 2024; 14:684. [PMID: 38929667 PMCID: PMC11204963 DOI: 10.3390/life14060684] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2024] [Revised: 05/21/2024] [Accepted: 05/23/2024] [Indexed: 06/28/2024] Open
Abstract
Plakortinic acids C (1) and D (2), an unseparable pair of endoperoxide polyketides isolated and purified from the symbiotic association of Caribbean Sea sponges Plakortis symbiotica-Xestospongia deweerdtae, underwent in vitro evaluation for antiplasmodial activity against the malaria parasite Plasmodium berghei using a drug luminescence assay. Initial screening at 10 µM revealed 50% in vitro parasite growth inhibition. The title compounds displayed antiplasmodial activity with an EC50 of 5.3 µM toward P. berghei parasites. The lytic activity against erythrocytes was assessed through an erythrocyte cell lysis assay, which showed non-lytic activity at lower concentrations ranging from 1.95 to 3.91 µM. The antiplasmodial activity and the absence of hemolytic activity support the potential of plakortinic acids C (1) and D (2) as promising lead compounds. Moreover, drug-likeness (ADMET) properties assessed through the pkCSM server predicted high intestinal absorption, hepatic metabolism, and volume of distribution, indicating favorable pharmacokinetic profiles for oral administration. These findings suggest the potential suitability of these metabolites for further investigations of antiplasmodial activity in multiple parasitic stages in the mosquito and Plasmodium falciparum. Notably, this study represents the first report of a marine natural product exhibiting the unique 7,8-dioxatricyclo[4.2.2.02,5]dec-9-ene motif being evaluated against malaria.
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Affiliation(s)
- Luis A. Amador
- Molecular Sciences Research Center, University of Puerto Rico, 1390 Ponce de León Avenue, San Juan 00926, Puerto Rico;
| | - Emilee E. Colón-Lorenzo
- Department of Microbiology and Medical Zoology, University of Puerto Rico School of Medicine, San Juan 00921, Puerto Rico;
| | - Abimael D. Rodríguez
- Molecular Sciences Research Center, University of Puerto Rico, 1390 Ponce de León Avenue, San Juan 00926, Puerto Rico;
| | - Adelfa E. Serrano
- Department of Microbiology and Medical Zoology, University of Puerto Rico School of Medicine, San Juan 00921, Puerto Rico;
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Mushtaq I, Sarwar MS, Chaudhry A, Shah SAH, Ahmad MM. Updates on traditional methods for combating malaria and emerging Wolbachia-based interventions. Front Cell Infect Microbiol 2024; 14:1330475. [PMID: 38716193 PMCID: PMC11074371 DOI: 10.3389/fcimb.2024.1330475] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Accepted: 03/14/2024] [Indexed: 05/24/2024] Open
Abstract
The escalating challenge of malaria control necessitates innovative approaches that extend beyond traditional control strategies. This review explores the incorporation of traditional vector control techniques with emerging Wolbachia-based interventions. Wolbachia, a naturally occurring bacteria, offers a novel approach for combatting vector-borne diseases, including malaria, by reducing the mosquitoes' ability to transmit these diseases. The study explores the rationale for this integration, presenting various case studies and pilot projects that have exhibited significant success. Employing a multi-dimensional approach that includes community mobilization, environmental modifications, and new biological methods, the paper posits that integrated efforts could mark a turning point in the struggle against malaria. Our findings indicate that incorporating Wolbachia-based strategies into existing vector management programs not only is feasible but also heightens the efficacy of malaria control initiatives in different countries especially in Pakistan. The paper concludes that continued research and international collaboration are imperative for translating these promising methods from the laboratory to the field, thereby offering a more sustainable and effective malaria control strategy.
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Dar A, Godara P, Prusty D, Bashir M. Plasmodium falciparum topoisomerases: Emerging targets for anti-malarial therapy. Eur J Med Chem 2024; 265:116056. [PMID: 38171145 DOI: 10.1016/j.ejmech.2023.116056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2023] [Revised: 12/12/2023] [Accepted: 12/12/2023] [Indexed: 01/05/2024]
Abstract
Different metabolic pathways like DNA replication, transcription, and recombination generate topological constrains in the genome. These topological constraints are resolved by essential molecular machines known as topoisomerases. To bring changes in DNA topology, the topoisomerases create a single or double-stranded nick in the template DNA, hold the nicked ends to let the tangled DNA pass through, and finally re-ligate the breaks. The DNA nicking and re-ligation activities as well as ATPase activities (when present) in topoisomerases are subjected to inhibition by several anticancer and antibacterial drugs, thus establishing these enzymes as successful targets in anticancer and antibacterial therapies. The anti-topoisomerase drugs interfere with the functioning of these enzymes and result in the accumulation of DNA tangles or lethal genomic breaks, thereby promoting host cell (or organism) death. The potential of topoisomerases in the human malarial parasite, Plasmodium falciparum in antimalarial drug development has received little attention so far. Interestingly, the parasite genome encodes orthologs of topoisomerases found in eukaryotes, prokaryotes, and archaea, thus, providing an enormous opportunity for investigating these enzymes for antimalarial therapeutics. This review focuses on the features of Plasmodium falciparum topoisomerases (PfTopos) with respect to their closer counterparts in other organisms. We will discuss overall advances and basic challenges with topoisomerase research in Plasmodium falciparum and our attempts to understand the interaction of PfTopos with classical and new-generation topoisomerase inhibitors using in silico molecular docking approach. The recent episodes of parasite resistance against artemisinin, the only effective antimalarial drug at present, further highlight the significance of investigating new drug targets including topoisomerases in antimalarial therapeutics.
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Affiliation(s)
- Ashraf Dar
- Department of Biochemistry, University of Kashmir, Srinagar, 190006, India.
| | - Priya Godara
- Central University of Rajasthan, Ajmer, Rajasthan, India
| | | | - Masarat Bashir
- COTS, Sheri-Kashmir University of Agricultural Sciences and Technology, Mirgund, Srinagar, India
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Prasad Raiguru B, Panda J, Mohapatra S, Nayak S. Recent developments in the synthesis of hybrid antimalarial drug discovery. Bioorg Chem 2023; 139:106706. [PMID: 37406519 DOI: 10.1016/j.bioorg.2023.106706] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2023] [Revised: 05/16/2023] [Accepted: 06/26/2023] [Indexed: 07/07/2023]
Abstract
In this 21st century, Malaria remains a global burden and causes massive economic trouble to disease-endemic nations. The control and eradication of malaria is a major challenge that requires an urgent need to develop novel antimalarial drugs. To overcome the aforementioned situation, several researchers have given significant effort to develop hybrid antimalarial agents in the search for new antimalarial drugs. Hence, we have summarized those developments of hybrid antimalarial agents from 2017 to till date. This review illustrates the current progress in the recent synthesis of hybrid antimalarial agents along with focusing on their antimalarial evaluation to find the most potent hybrids. This present mini-review will also be useful for the scientific community for the development of new antimalarial drugs to eradicate malaria.
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Affiliation(s)
| | - Jasmine Panda
- Department of Chemistry, Ravenshaw University, Cuttack 753003, India
| | | | - Sabita Nayak
- Department of Chemistry, Ravenshaw University, Cuttack 753003, India
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Shen YL, Bu FZ, Yu YM, Meng SS, Wu ZY, Yan CW, Li YT. The molecular salt of pyrimethamine and fenbufen for enhancing dissolubility via an assisted efficacy-increasing approach of dual-drug salt formation: A combined study including theory analysis and experiment validation. J Mol Struct 2023. [DOI: 10.1016/j.molstruc.2023.135455] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023]
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Jaén-Sánchez N, González-Azpeitia G, Carranza-Rodriguez C, Manwere N, Garay-Sánchez P, Vallejo-Torres L, Pérez-Arellano JL. Increased peripartum mortality associated with maternal subclinical malaria in Mozambique. Malar J 2023; 22:182. [PMID: 37309000 DOI: 10.1186/s12936-023-04613-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2023] [Accepted: 06/01/2023] [Indexed: 06/14/2023] Open
Abstract
BACKGROUND Plasmodium falciparum infection in pregnant women in sub-Saharan Africa is often asymptomatic. As these forms of malaria are often submicroscopic and difficult to diagnose by conventional methods (microscopy and/or rapid diagnostic test), diagnosis requires the use of molecular techniques such as polymerase chain reaction (PCR). This study analyses the prevalence of subclinical malaria and its association with adverse maternal and neonatal outcomes, a topic that has been scarcely evaluated in the literature. METHODS A cross-sectional study was conducted using semi-nested multiplex PCR to assess the presence of P. falciparum in placental and peripheral blood of 232 parturient pregnant women at the Hospital Provincial de Tete, Mozambique between March 2017 and May 2019. Multivariate regressions were performed to assess the associations of maternal subclinical malaria with several maternal and neonatal outcomes after controlling for the presence of preeclampsia/eclampsia (PE/E) and HIV infection, as well as for other maternal and pregnancy characteristics. RESULTS In total, 17.2% (n = 40) of the women studied had positive PCR for P. falciparum (7 in placental blood only, 3 in peripheral blood only). We found a significant association between subclinical malaria and a higher peripartum mortality risk, which persisted after controlling for maternal comorbidity and maternal and pregnancy characteristics (adjusted odds ratio: 3.50 [1.11-10.97]). In addition, PE/E and HIV infections were also significantly associated with several adverse maternal and neonatal outcomes. CONCLUSION This study demonstrated the association of subclinical malaria, as well as of PE/E and HIV, in pregnant women with adverse maternal and neonatal outcomes. Therefore, molecular methods may be sensitive tools to identify asymptomatic infections that can reduce the impact on peripartum mortality and their contribution to sustained transmission of the parasite in endemic countries.
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Affiliation(s)
- Nieves Jaén-Sánchez
- Infectious Diseases and Tropical Medicine Division, Complejo Hospitalario Universitario Insular Materno Infantil, Las Palmas de Gran Canaria, Spain
- University of Las Palmas de Gran Canaria, Las Palmas de Gran Canaria, Spain
| | - Gloria González-Azpeitia
- University of Las Palmas de Gran Canaria, Las Palmas de Gran Canaria, Spain
- Pediatric Division, Complejo Hospitalario Universitario Insular Materno Infantil, Las Palmas de Gran Canaria, Spain
| | - Cristina Carranza-Rodriguez
- Infectious Diseases and Tropical Medicine Division, Complejo Hospitalario Universitario Insular Materno Infantil, Las Palmas de Gran Canaria, Spain.
- University of Las Palmas de Gran Canaria, Las Palmas de Gran Canaria, Spain.
| | - Nicholas Manwere
- Department of Health Sciences, University of Zambeze, Beira, Mozambique
| | | | - Laura Vallejo-Torres
- Department of Quantitative Methods in Economics and Management, University of Las Palmas de Gran Canaria, Las Palmas de Gran Canaria, Spain
| | - José-Luis Pérez-Arellano
- Infectious Diseases and Tropical Medicine Division, Complejo Hospitalario Universitario Insular Materno Infantil, Las Palmas de Gran Canaria, Spain
- University of Las Palmas de Gran Canaria, Las Palmas de Gran Canaria, Spain
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Tadele G, Jawara A, Oboh M, Oriero E, Dugassa S, Amambua-Ngwa A, Golassa L. Clinical isolates of uncomplicated falciparum malaria from high and low malaria transmission areas show distinct pfcrt and pfmdr1 polymorphisms in western Ethiopia. Malar J 2023; 22:171. [PMID: 37270589 DOI: 10.1186/s12936-023-04602-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2022] [Accepted: 05/20/2023] [Indexed: 06/05/2023] Open
Abstract
BACKGROUND Pfcrt gene has been associated with chloroquine resistance and the pfmdr1 gene can alter malaria parasite susceptibility to lumefantrine, mefloquine, and chloroquine. In the absence of chloroquine (CQ) and extensive use of artemether-lumefantrine (AL) from 2004 to 2020 to treat uncomplicated falciparum malaria, pfcrt haplotype, and pfmdr1 single nucleotide polymorphisms (SNPs) were determined in two sites of West Ethiopia with a gradient of malaria transmission. METHODS 230 microscopically confirmed P. falciparum isolates were collected from Assosa (high transmission area) and Gida Ayana (low transmission area) sites, of which 225 of them tested positive by PCR. High-Resolution Melting Assay (HRM) was used to determine the prevalence of pfcrt haplotypes and pfmdr1 SNPs. Furthermore, the pfmdr1 gene copy number (CNV) was determined using real-time PCR. A P-value of less or equal to 0.05 was considered significant. RESULTS Of the 225 samples, 95.5%, 94.4%, 86.7%, 91.1%, and 94.2% were successfully genotyped with HRM for pfcrt haplotype, pfmdr1-86, pfmdr1-184, pfmdr1-1042 and pfmdr1-1246, respectively. The mutant pfcrt haplotypes were detected among 33.5% (52/155) and 80% (48/60) of isolates collected from the Assosa and Gida Ayana sites, respectively. Plasmodium falciparum with chloroquine-resistant haplotypes was more prevalent in the Gida Ayana area compared with the Assosa area (COR = 8.4, P = 0.00). Pfmdr1-N86Y wild type and 184F mutations were found in 79.8% (166/208) and 73.4% (146/199) samples, respectively. No single mutation was observed at the pfmdr1-1042 locus; however, 89.6% (190/212) of parasites in West Ethiopia carry the wild-type D1246Y variants. Eight pfmdr1 haplotypes at codons N86Y-Y184F-D1246Y were identified with the dominant NFD 61% (122/200). There was no difference in the distribution of pfmdr1 SNPs, haplotypes, and CNV between the two study sites (P > 0.05). CONCLUSION Plasmodium falciparum with the pfcrt wild-type haplotype was prevalent in high malaria transmission site than in low transmission area. The NFD haplotype was the predominant haplotype of the N86Y-Y184F-D1246Y. A continuous investigation is needed to closely monitor the changes in the pfmdr1 SNPs, which are associated with the selection of parasite populations by ACT.
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Affiliation(s)
- Geletta Tadele
- Aklilu Lemma Institute of Pathobiology, Addis Ababa University, Addis Ababa, Ethiopia
| | - Aminata Jawara
- Medical Research Council Unit the Gambia, London School of Hygiene and Tropical Medicine, Banjul, Gambia
| | - Mary Oboh
- Medical Research Council Unit the Gambia, London School of Hygiene and Tropical Medicine, Banjul, Gambia
| | - Eniyou Oriero
- Medical Research Council Unit the Gambia, London School of Hygiene and Tropical Medicine, Banjul, Gambia
| | - Sisay Dugassa
- Aklilu Lemma Institute of Pathobiology, Addis Ababa University, Addis Ababa, Ethiopia
| | - Alfred Amambua-Ngwa
- Medical Research Council Unit the Gambia, London School of Hygiene and Tropical Medicine, Banjul, Gambia
| | - Lemu Golassa
- Aklilu Lemma Institute of Pathobiology, Addis Ababa University, Addis Ababa, Ethiopia.
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Previti S, Ettari R, Di Chio C, Legac J, Bogacz M, Zimmer C, Schirmeister T, Rosenthal PJ, Zappalà M. Influence of amino acid size at the P3 position of N-Cbz-tripeptide Michael acceptors targeting falcipain-2 and rhodesain for the treatment of malaria and human african trypanosomiasis. Bioorg Chem 2023; 137:106587. [PMID: 37163812 DOI: 10.1016/j.bioorg.2023.106587] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2023] [Revised: 04/18/2023] [Accepted: 05/01/2023] [Indexed: 05/12/2023]
Abstract
In recent decades, several structure-activity relationship (SAR) studies provided potent inhibitors of the cysteine proteases falcipain-2 (FP-2) and rhodesain (RD) from Plasmodium falciparum and Trypanosoma brucei rhodesiense, respectively. Whilst the roles of the warhead and residues targeting the P1 and P2 pockets of the proteases were extensively investigated, the roles of the amino acids occupying the S3 pocket were not widely assessed. Herein we report the synthesis and biological evaluation of a set of novel Michael acceptors bearing amino acids of increasing size at the P3 site (1a-g/2a-g, SPR20-SPR33) against FP-2, RD, P. falciparum, and T. brucei. Overall, the Michael acceptors bearing small amino acids at the P3 site exhibited the most potent inhibitory properties towards FP-2. In contrast, analogues with bulky residues at the P3 position were very potent rhodesain inhibitors. In cell based assays, single-digit micromolar EC50 values against the two protozoa were observed. These findings can be a starting point for the development of peptide-based FP-2 and RD inhibitors.
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Affiliation(s)
- Santo Previti
- Department of Chemical, Biological, Pharmaceutical, and Environmental Sciences, University of Messina, Viale Stagno d'Alcontres 31, 98166 Messina, Italy.
| | - Roberta Ettari
- Department of Chemical, Biological, Pharmaceutical, and Environmental Sciences, University of Messina, Viale Stagno d'Alcontres 31, 98166 Messina, Italy
| | - Carla Di Chio
- Department of Chemical, Biological, Pharmaceutical, and Environmental Sciences, University of Messina, Viale Stagno d'Alcontres 31, 98166 Messina, Italy
| | - Jenny Legac
- Department of Medicine, University of California, San Francisco, CA 94143, United States
| | - Marta Bogacz
- Institute of Organic Chemistry & Macromolecular Chemistry, Friedrich-Schiller-University of Jena, 07743 Jena, Germany
| | - Collin Zimmer
- Institute of Pharmaceutical and Biomedical Sciences, University of Mainz, 55128 Mainz, Germany
| | - Tanja Schirmeister
- Institute of Pharmaceutical and Biomedical Sciences, University of Mainz, 55128 Mainz, Germany
| | - Philip J Rosenthal
- Department of Medicine, University of California, San Francisco, CA 94143, United States
| | - Maria Zappalà
- Department of Chemical, Biological, Pharmaceutical, and Environmental Sciences, University of Messina, Viale Stagno d'Alcontres 31, 98166 Messina, Italy
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Pandey SK, Anand U, Siddiqui WA, Tripathi R. Drug Development Strategies for Malaria: With the Hope for New Antimalarial Drug Discovery—An Update. Adv Med 2023; 2023:5060665. [PMID: 36960081 PMCID: PMC10030226 DOI: 10.1155/2023/5060665] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/21/2022] [Revised: 02/27/2023] [Accepted: 03/08/2023] [Indexed: 03/15/2023] Open
Abstract
Malaria continued to be a deadly situation for the people of tropical and subtropical countries. Although there has been a marked reduction in new cases as well as mortality and morbidity rates in the last two decades, the reporting of malaria caused 247 million cases and 619000 deaths worldwide in 2021, according to the WHO (2022). The development of drug resistance and declining efficacy against most of the antimalarial drugs/combination in current clinical practice is a big challenge for the scientific community, and in the absence of an effective vaccine, the problem becomes worse. Experts from various research organizations worldwide are continuously working hard to stop this disaster by employing several strategies for the development of new antimalarial drugs/combinations. The current review focuses on the history of antimalarial drug discovery and the advantages, loopholes, and opportunities associated with the common strategies being followed for antimalarial drug development.
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Affiliation(s)
- Swaroop Kumar Pandey
- 1Department of Life Sciences, The National Institute for Biotechnology in the Negev, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel
| | - Uttpal Anand
- 2Department of Life Sciences, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel
| | - Waseem A. Siddiqui
- 3Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh 202001, Uttar Pradesh, India
| | - Renu Tripathi
- 4Department of Molecular Microbiology and Immunology, CSIR-Central Drug Research Institute, Lucknow 226031, Uttar Pradesh, India
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Zanghi G, Patel H, Camargo N, Smith JL, Bae Y, Flannery EL, Chuenchob V, Fishbaugher ME, Mikolajczak SA, Roobsoong W, Sattabongkot J, Hayes K, Vaughan AM, Kappe SHI. Global gene expression of human malaria parasite liver stages throughout intrahepatocytic development. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.01.05.522945. [PMID: 36711670 PMCID: PMC9881933 DOI: 10.1101/2023.01.05.522945] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Plasmodium falciparum (Pf) is causing the greatest malaria burden, yet the liver stages (LS) of this most important parasite species have remained poorly studied. Here, we used a human liver-chimeric mouse model in combination with a novel fluorescent PfNF54 parasite line (PfNF54cspGFP) to isolate PfLS-infected hepatocytes and generate transcriptomes that cover the major LS developmental phases in human hepatocytes. RNA-seq analysis of early Pf LS trophozoites two days after infection, revealed a central role of translational regulation in the transformation of the extracellular invasive sporozoite into intracellular LS. The developmental time course gene expression analysis indicated that fatty acid biosynthesis, isoprenoid biosynthesis and iron metabolism are sustaining LS development along with amino acid metabolism and biosynthesis. Countering oxidative stress appears to play an important role during intrahepatic LS development. Furthermore, we observed expression of the variant PfEMP1 antigen-encoding var genes, and we confirmed expression of PfEMP1 protein during LS development. Transcriptome comparison of the late Pf liver stage schizonts with P. vivax (Pv) late liver stages revealed highly conserved gene expression profiles among orthologous genes. A notable difference however was the expression of genes regulating sexual stage commitment. While Pv schizonts expressed markers of sexual commitment, the Pf LS parasites were not sexually committed and showed expression of gametocytogenesis repression factors. Our results provide the first comprehensive gene expression profile of the human malaria parasite Pf LS isolated during in vivo intrahepatocytic development. This data will inform biological studies and the search for effective intervention strategies that can prevent infection.
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Affiliation(s)
- Gigliola Zanghi
- Center for Global Infectious Disease Research, Seattle Children’s Research Institute, Seattle, Washington, United States of America
| | - Hardik Patel
- Center for Global Infectious Disease Research, Seattle Children’s Research Institute, Seattle, Washington, United States of America
| | - Nelly Camargo
- Center for Global Infectious Disease Research, Seattle Children’s Research Institute, Seattle, Washington, United States of America
| | - Jenny L. Smith
- Research Scientific Computing, Seattle Children’s Research Institute, Seattle, Washington, United States of America
| | - Yeji Bae
- Research Scientific Computing, Seattle Children’s Research Institute, Seattle, Washington, United States of America
| | - Erika L. Flannery
- Center for Global Infectious Disease Research, Seattle Children’s Research Institute, Seattle, Washington, United States of America
- Novartis Institute for Tropical Diseases, Emeryville, CA, United State
| | - Vorada Chuenchob
- Center for Global Infectious Disease Research, Seattle Children’s Research Institute, Seattle, Washington, United States of America
- Novartis Institute for Tropical Diseases, Emeryville, CA, United State
| | - Matthew E. Fishbaugher
- Center for Global Infectious Disease Research, Seattle Children’s Research Institute, Seattle, Washington, United States of America
- Novartis Institute for Tropical Diseases, Emeryville, CA, United State
| | - Sebastian A Mikolajczak
- Center for Global Infectious Disease Research, Seattle Children’s Research Institute, Seattle, Washington, United States of America
- Novartis Institute for Tropical Diseases, Emeryville, CA, United State
| | - Wanlapa Roobsoong
- Mahidol Vivax Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok 10400, Thailand
| | - Jetsumon Sattabongkot
- Mahidol Vivax Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok 10400, Thailand
| | - Kiera Hayes
- Center for Global Infectious Disease Research, Seattle Children’s Research Institute, Seattle, Washington, United States of America
| | - Ashley M. Vaughan
- Center for Global Infectious Disease Research, Seattle Children’s Research Institute, Seattle, Washington, United States of America
- Department of Pediatrics, University of Washington
- Department of Global Health, University of Washington, Seattle, Washington, United States of America
| | - Stefan H. I. Kappe
- Center for Global Infectious Disease Research, Seattle Children’s Research Institute, Seattle, Washington, United States of America
- Department of Pediatrics, University of Washington
- Department of Global Health, University of Washington, Seattle, Washington, United States of America
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Hassen J, Alemayehu GS, Dinka H, Golassa L. High prevalence of Pfcrt 76T and Pfmdr1 N86 genotypes in malaria infected patients attending health facilities in East Shewa zone, Oromia Regional State, Ethiopia. Malar J 2022; 21:286. [PMID: 36207750 PMCID: PMC9547420 DOI: 10.1186/s12936-022-04304-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2022] [Accepted: 09/27/2022] [Indexed: 12/02/2022] Open
Abstract
Background Plasmodium falciparum resistance to series of anti-malarial drugs is a major challenge in efforts to control and/or eliminate malaria globally. In 1998, following the widespread of chloroquine (CQ) resistant P. falciparum, Ethiopia switched from CQ to sulfadoxine–pyrimethamine (SP) and subsequently in 2004 from SP to artemether–lumefantrine (AL) for the treatment of uncomplicated falciparum malaria. Data on the prevalence of CQ resistance markers after more than two decades of its removal is important to map the selection pressure behind the targets codons of interest. The present study was conducted to determine the prevalence of mutations in Pfcrt K76T and Pfmdr1 N86Y codons among malaria-infected patients from Adama, Olenchiti and Metehara sites of East Shewa zone, Oromia Regional State, Ethiopia. Methods Finger-prick whole blood samples were collected on 3MM Whatman ® filter papers from a total of 121 microscopically confirmed P. falciparum infected patients. Extraction of parasite DNA was done by Chelex-100 method from dried blood spot (DBS). Genomic DNA template was used to amplify Pfcrt K76T and Pfmdr1 N86Y codons by nested PCR. Nested PCR products were subjected to Artherobacter protophormiae-I (APoI) restriction enzyme digestion to determine mutations at codons 76 and 86 of Pfcrt and Pfmdr1 genes, respectively. Results Of 83 P. falciparum isolates successfully genotyped for Pfcrt K76T, 91.6% carried the mutant genotypes (76T). The prevalence of Pfcrt 76T was 95.7%, 92.5% and 84.5% in Adama, Metehara and Olenchiti, respectively. The prevalence of Pfcrt 76T mutations in three of the study sites showed no statistical significance difference (χ2 = 1.895; P = 0.388). On the other hand, of the 80 P. falciparum samples successfully amplified for Pfmdr1, all carried the wild-type genotypes (Pfmdr1 N86). Conclusion Although CQ officially has been ceased for the treatment of falciparum malaria for more than two decades in Ethiopia, greater proportions of P. falciparum clinical isolates circulating in the study areas carry the mutant 76T genotypes indicating the presence of indirect CQ pressure in the country. However, the return of Pfmdr1 N86 wild-type allele may be favoured by the use of AL for the treatment of uncomplicated falciparum malaria. Supplementary Information The online version contains supplementary material available at 10.1186/s12936-022-04304-5.
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Affiliation(s)
- Jifar Hassen
- Department of Applied Biology, School of Applied Natural Science, Adama Science and Technology University, P. O. Box 1888, Adama, Ethiopia.
| | - Gezahegn Solomon Alemayehu
- Research and Community Service Center, College of Health Science, Defense University, P. O. Box 1419, Bishoftu, Ethiopia
| | - Hunduma Dinka
- Department of Applied Biology, School of Applied Natural Science, Adama Science and Technology University, P. O. Box 1888, Adama, Ethiopia
| | - Lemu Golassa
- Aklilu Lemma Institute of Pathobiology, Addis Ababa University, P. O. Box 1176, Addis Ababa, Ethiopia
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Nana RRD, Bayengue SSB, Mogtomo MLK, Ngane ARN, Singh V. Anti-folate quintuple mutations in Plasmodium falciparum asymptomatic infections in Yaoundé, Cameroon. Parasitol Int 2022; 92:102657. [PMID: 36038059 DOI: 10.1016/j.parint.2022.102657] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2022] [Revised: 07/07/2022] [Accepted: 08/19/2022] [Indexed: 11/28/2022]
Abstract
A major challenge in the fight to effectively control malaria is the emergence of resistant parasite to drugs used in therapy as well as for chemoprevention. In this study, single nucleotide polymorphisms (SNPs) associated with Plasmodium falciparum resistance to sulfadoxine-pyrimethamine (SP), one of the partner drugs in artemisinin-based therapies (ACTs) were studied in asymptomatic P. falciparum isolates from Cameroon. Dried Blood spots were collected from children with asymptomatic malaria enrolled during a household survey. The P. falciparum dihydrofolate reductase (Pfdhfr), dihydropteroate synthase (Pfdhps) and Kelch 13 genes were amplified and point mutations in these gene sequences were analyzed by sequencing. Among a total of 234 samples collected, 51 showed parasitaemia after microscopic examination of which 47 were P. falciparum mono-infections. Molecular analysis revealed 97.3% of mutant alleles at codons 51I, 59R and 108 N in Pfdhfr gene. In Pfdhps gene the most common mutation was 437G (83.3%); followed by 436A (47.6%) and 436F (28.6%). The association of mutations in the two genes (dhfr + dhps) showed 11 different haplotypes including three sextuple mutants (IRNI + AGKGA, IRNI + AAKGS, IRNI + AGKAS) and one septuple mutant (IRNI + AGKGS). For K13 gene no SNPs were seen in the studied asymptomatic malaria samples. The findings revealed presence of SP-resistant alleles in asymptomatic infected individuals with presence of sextuples and septuple SNPs. This emphasizes that regular profiling of antimalarial drugs resistance markers in such population is essential for malaria control and elimination programmes.
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Affiliation(s)
- Rodrigue Roman Dongang Nana
- Institute of Medical Research and Medicinal Plants studies, PO Box 13033, Yaoundé, Cameroon; ICMR-National Institute of Malaria Research, Dwarka, Sector 8, New Delhi 110077, India
| | | | | | - Anne Rosalie Ngono Ngane
- Department of Biochemistry, Faculty of Science, University of Douala, PO Box 24157, Douala, Cameroon
| | - Vineeta Singh
- ICMR-National Institute of Malaria Research, Dwarka, Sector 8, New Delhi 110077, India.
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Brettner L, Ho WC, Schmidlin K, Apodaca S, Eder R, Geiler-Samerotte K. Challenges and potential solutions for studying the genetic and phenotypic architecture of adaptation in microbes. Curr Opin Genet Dev 2022; 75:101951. [PMID: 35797741 DOI: 10.1016/j.gde.2022.101951] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2022] [Revised: 06/01/2022] [Accepted: 06/14/2022] [Indexed: 11/29/2022]
Abstract
All organisms are defined by the makeup of their DNA. Over billions of years, the structure and information contained in that DNA, often referred to as genetic architecture, have been honed by a multitude of evolutionary processes. Mutations that cause genetic elements to change in a way that results in beneficial phenotypic change are more likely to survive and propagate through the population in a process known as adaptation. Recent work reveals that the genetic targets of adaptation are varied and can change with genetic background. Further, seemingly similar adaptive mutations, even within the same gene, can have diverse and unpredictable effects on phenotype. These challenges represent major obstacles in predicting adaptation and evolution. In this review, we cover these concepts in detail and identify three emerging synergistic solutions: higher-throughput evolution experiments combined with updated genotype-phenotype mapping strategies and physiological models. Our review largely focuses on recent literature in yeast, and the field seems to be on the cusp of a new era with regard to studying the predictability of evolution.
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20
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Chowdhary S, Shalini, Mosnier J, Fonta I, Pradines B, Cele N, Seboletswe P, Singh P, Kumar V. Synthesis, Anti-Plasmodial Activities, and Mechanistic Insights of 4-Aminoquinoline-Triazolopyrimidine Hybrids. ACS Med Chem Lett 2022; 13:1068-1076. [DOI: 10.1021/acsmedchemlett.2c00078] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Affiliation(s)
- Shefali Chowdhary
- Department of Chemistry, Guru Nanak Dev University, Amritsar 143005, India
| | - Shalini
- Department of Chemistry, Guru Nanak Dev University, Amritsar 143005, India
| | - Joel Mosnier
- Unité Parasitologie et Entomologie, Département Microbiologie et Maladies Infectieuses, Institut de Recherché Biomédicale des Armées, Marseille 13262, France
- Aix Marseille Univ, IRD, SSA, AP-HM, VITROME, Marseille 13262, France
- IHU Méditerranée Infection, Marseille 13262, France
- Centre National de Reference du Paludisme, Marseille 13262, France
| | - Isabelle Fonta
- Unité Parasitologie et Entomologie, Département Microbiologie et Maladies Infectieuses, Institut de Recherché Biomédicale des Armées, Marseille 13262, France
- Aix Marseille Univ, IRD, SSA, AP-HM, VITROME, Marseille 13262, France
- IHU Méditerranée Infection, Marseille 13262, France
- Centre National de Reference du Paludisme, Marseille 13262, France
| | - Bruno Pradines
- Unité Parasitologie et Entomologie, Département Microbiologie et Maladies Infectieuses, Institut de Recherché Biomédicale des Armées, Marseille 13262, France
- Aix Marseille Univ, IRD, SSA, AP-HM, VITROME, Marseille 13262, France
- IHU Méditerranée Infection, Marseille 13262, France
- Centre National de Reference du Paludisme, Marseille 13262, France
| | - Nosipho Cele
- School of Chemistry and Physics, University of KwaZulu-Natal, P/Bag X54001, Westville, Durban South Africa
| | - Pule Seboletswe
- School of Chemistry and Physics, University of KwaZulu-Natal, P/Bag X54001, Westville, Durban South Africa
| | - Parvesh Singh
- School of Chemistry and Physics, University of KwaZulu-Natal, P/Bag X54001, Westville, Durban South Africa
| | - Vipan Kumar
- Department of Chemistry, Guru Nanak Dev University, Amritsar 143005, India
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Oyegoke OO, Maharaj L, Akoniyon OP, Kwoji I, Roux AT, Adewumi TS, Maharaj R, Oyebola BT, Adeleke MA, Okpeku M. Malaria diagnostic methods with the elimination goal in view. Parasitol Res 2022; 121:1867-1885. [PMID: 35460369 PMCID: PMC9033523 DOI: 10.1007/s00436-022-07512-9] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2021] [Accepted: 04/01/2022] [Indexed: 01/08/2023]
Abstract
Malaria control measures have been in use for years but have not completely curbed the spread of infection. Ultimately, global elimination is the goal. A major playmaker in the various approaches to reaching the goal is the issue of proper diagnosis. Various diagnostic techniques were adopted in different regions and geographical locations over the decades, and these have invariably produced diverse outcomes. In this review, we looked at the various approaches used in malaria diagnostics with a focus on methods favorably used during pre-elimination and elimination phases as well as in endemic regions. Microscopy, rapid diagnostic testing (RDT), loop-mediated isothermal amplification (LAMP), and polymerase chain reaction (PCR) are common methods applied depending on prevailing factors, each with its strengths and limitations. As the drive toward the elimination goal intensifies, the search for ideal, simple, fast, and reliable point-of-care diagnostic tools is needed more than ever before to be used in conjunction with a functional surveillance system supported by the ideal vaccine.
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Affiliation(s)
- Olukunle O Oyegoke
- Discipline of Genetics School of Life Sciences, University of KwaZulu-Natal, Westville, Durban, South Africa
| | - Leah Maharaj
- Discipline of Genetics School of Life Sciences, University of KwaZulu-Natal, Westville, Durban, South Africa
| | - Oluwasegun P Akoniyon
- Discipline of Genetics School of Life Sciences, University of KwaZulu-Natal, Westville, Durban, South Africa
| | - Illiya Kwoji
- Discipline of Genetics School of Life Sciences, University of KwaZulu-Natal, Westville, Durban, South Africa
| | - Alexandra T Roux
- Discipline of Genetics School of Life Sciences, University of KwaZulu-Natal, Westville, Durban, South Africa
| | - Taiye S Adewumi
- Discipline of Genetics School of Life Sciences, University of KwaZulu-Natal, Westville, Durban, South Africa
| | - Rajendra Maharaj
- Office of Malaria Research, Medical Research Council, Durban, South Africa
| | | | - Matthew A Adeleke
- Discipline of Genetics School of Life Sciences, University of KwaZulu-Natal, Westville, Durban, South Africa
| | - Moses Okpeku
- Discipline of Genetics School of Life Sciences, University of KwaZulu-Natal, Westville, Durban, South Africa.
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22
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Akoniyon OP, Adewumi TS, Maharaj L, Oyegoke OO, Roux A, Adeleke MA, Maharaj R, Okpeku M. Whole Genome Sequencing Contributions and Challenges in Disease Reduction Focused on Malaria. BIOLOGY 2022; 11:587. [PMID: 35453786 PMCID: PMC9027812 DOI: 10.3390/biology11040587] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/13/2022] [Revised: 03/31/2022] [Accepted: 04/01/2022] [Indexed: 12/11/2022]
Abstract
Malaria elimination remains an important goal that requires the adoption of sophisticated science and management strategies in the era of the COVID-19 pandemic. The advent of next generation sequencing (NGS) is making whole genome sequencing (WGS) a standard today in the field of life sciences, as PCR genotyping and targeted sequencing provide insufficient information compared to the whole genome. Thus, adapting WGS approaches to malaria parasites is pertinent to studying the epidemiology of the disease, as different regions are at different phases in their malaria elimination agenda. Therefore, this review highlights the applications of WGS in disease management, challenges of WGS in controlling malaria parasites, and in furtherance, provides the roles of WGS in pursuit of malaria reduction and elimination. WGS has invaluable impacts in malaria research and has helped countries to reach elimination phase rapidly by providing required information needed to thwart transmission, pathology, and drug resistance. However, to eliminate malaria in sub-Saharan Africa (SSA), with high malaria transmission, we recommend that WGS machines should be readily available and affordable in the region.
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Affiliation(s)
- Olusegun Philip Akoniyon
- Discipline of Genetics, School of Life Sciences, University of KwaZulu-Natal, Westville Campus, Durban 4041, South Africa; (O.P.A.); (T.S.A.); (L.M.); (O.O.O.); (A.R.); (M.A.A.)
| | - Taiye Samson Adewumi
- Discipline of Genetics, School of Life Sciences, University of KwaZulu-Natal, Westville Campus, Durban 4041, South Africa; (O.P.A.); (T.S.A.); (L.M.); (O.O.O.); (A.R.); (M.A.A.)
| | - Leah Maharaj
- Discipline of Genetics, School of Life Sciences, University of KwaZulu-Natal, Westville Campus, Durban 4041, South Africa; (O.P.A.); (T.S.A.); (L.M.); (O.O.O.); (A.R.); (M.A.A.)
| | - Olukunle Olugbenle Oyegoke
- Discipline of Genetics, School of Life Sciences, University of KwaZulu-Natal, Westville Campus, Durban 4041, South Africa; (O.P.A.); (T.S.A.); (L.M.); (O.O.O.); (A.R.); (M.A.A.)
| | - Alexandra Roux
- Discipline of Genetics, School of Life Sciences, University of KwaZulu-Natal, Westville Campus, Durban 4041, South Africa; (O.P.A.); (T.S.A.); (L.M.); (O.O.O.); (A.R.); (M.A.A.)
| | - Matthew A. Adeleke
- Discipline of Genetics, School of Life Sciences, University of KwaZulu-Natal, Westville Campus, Durban 4041, South Africa; (O.P.A.); (T.S.A.); (L.M.); (O.O.O.); (A.R.); (M.A.A.)
| | - Rajendra Maharaj
- Office of Malaria Research, South African Medical Research Council, Cape Town 7505, South Africa;
| | - Moses Okpeku
- Discipline of Genetics, School of Life Sciences, University of KwaZulu-Natal, Westville Campus, Durban 4041, South Africa; (O.P.A.); (T.S.A.); (L.M.); (O.O.O.); (A.R.); (M.A.A.)
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23
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Al-Mekhlafi HM, Madkhali AM, Abdulhaq AA, Atroosh WM, Ghzwani AH, Zain KA, Ghailan KY, Hamali HA, Mobarki AA, Alharazi TH, Eisa ZM, Lau YL. Polymorphism analysis of pfmdr1 gene in Plasmodium falciparum isolates 11 years post-adoption of artemisinin-based combination therapy in Saudi Arabia. Sci Rep 2022; 12:517. [PMID: 35017593 PMCID: PMC8752599 DOI: 10.1038/s41598-021-04450-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2021] [Accepted: 12/16/2021] [Indexed: 11/24/2022] Open
Abstract
A total of 227 Plasmodium falciparum isolates from Jazan region, southwestern Saudi Arabia were amplified for the P. falciparum multi-drug resistance 1 (pfmdr1) gene to detect point mutations 11 years after the introduction of artemisinin-based combination therapy (ACT) in Saudi Arabia. The pfmdr1 86Y mutation was found in 11.5% (26/227) of the isolates while the N86 wild allele was detected in 88.5%. Moreover, 184F point mutations dominated (86.3%) the instances of pfmdr1 polymorphism while no mutation was observed at codons 1034, 1042 and 1246. Three pfmdr1 haplotypes were identified, NFSND (74.9%), NYSND (13.7%) and YFSND (11.4%). Associations of the prevalence of 86Y mutation and YFSND haplotype with participants' nationality, residency and parasitaemia level were found to be significant (P < 0.05). The findings revealed significant decline in the prevalence of the pfmdr1 86Y mutation in P. falciparum isolates from Jazan region over a decade after the implementation of ACT treatment. Moreover, the high prevalence of the NFSND haplotype might be indicative of the potential emergence of CQ-sensitive but artemether-lumefantrine-resistant P. falciparum strains since the adoption of ACT. Therefore, continuous monitoring of the molecular markers of antimalarial drug resistance in Jazan region is highly recommended.
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Affiliation(s)
- Hesham M Al-Mekhlafi
- Medical Research Centre, Jazan University, Jazan, Kingdom of Saudi Arabia.
- Vector-Borne Diseases Research Group, Jazan University, Jazan, Kingdom of Saudi Arabia.
- Department of Parasitology, Faculty of Medicine and Health Sciences, Sana'a University, Sana'a, Yemen.
| | - Aymen M Madkhali
- Medical Research Centre, Jazan University, Jazan, Kingdom of Saudi Arabia.
- Department of Medical Laboratory Technology, Faculty of Applied Medical Sciences, Jazan University, Jazan, Kingdom of Saudi Arabia.
| | - Ahmed A Abdulhaq
- Vector-Borne Diseases Research Group, Jazan University, Jazan, Kingdom of Saudi Arabia
- Department of Medical Laboratory Technology, Faculty of Applied Medical Sciences, Jazan University, Jazan, Kingdom of Saudi Arabia
| | - Wahib M Atroosh
- Department of Parasitology, Faculty of Medicine, University of Malaya, 50603, Kuala Lumpur, Malaysia
- Department of Microbiology and Parasitology, Faculty of Medicine and Health Sciences, University of Aden, Aden, Yemen
| | | | - Khalid Ammash Zain
- Medical Research Centre, Jazan University, Jazan, Kingdom of Saudi Arabia
| | - Khalid Y Ghailan
- Vector-Borne Diseases Research Group, Jazan University, Jazan, Kingdom of Saudi Arabia
- Faculty of Public Health and Tropical Medicine, Jazan University, Jazan, Kingdom of Saudi Arabia
| | - Hassan A Hamali
- Department of Medical Laboratory Technology, Faculty of Applied Medical Sciences, Jazan University, Jazan, Kingdom of Saudi Arabia
| | - Abdullah A Mobarki
- Department of Medical Laboratory Technology, Faculty of Applied Medical Sciences, Jazan University, Jazan, Kingdom of Saudi Arabia
| | - Talal H Alharazi
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, University of Hail, Hail, Kingdom of Saudi Arabia
- Department of Microbiology and Immunology, Faculty of Medicine and Health Sciences, Taiz University, Taiz, Yemen
| | - Zaki M Eisa
- Saudi Centre for Disease Prevention and Control, Ministry of Health, Jazan, Kingdom of Saudi Arabia
| | - Yee-Ling Lau
- Department of Parasitology, Faculty of Medicine, University of Malaya, 50603, Kuala Lumpur, Malaysia
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Mwamlima TG, Mwakasungula SM, Mkindi CG, Tambwe MM, Mswata SS, Mbwambo SG, Mboya MF, Draper SJ, Silk SE, Mpina MG, Vianney JM, Olotu AI. Understanding the role of serological and clinical data on assessing the dynamic of malaria transmission: a case study of Bagamoyo district, Tanzania. Pan Afr Med J 2022; 43:60. [PMID: 36578806 PMCID: PMC9755714 DOI: 10.11604/pamj.2022.43.60.35779] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2022] [Accepted: 09/01/2022] [Indexed: 12/30/2022] Open
Abstract
Introduction naturally acquired blood-stage malaria antibodies and malaria clinical data have been reported to be useful in monitoring malaria change over time and as a marker of malaria exposure. This study assessed the total immunoglobulin G (IgG) levels to Plasmodium falciparum schizont among infants (5-17 months), estimated malaria incidence using routine health facility-based surveillance data and predicted trend relation between anti-schizont antibodies and malaria incidence in Bagamoyo. Methods 252 serum samples were used for assessment of total IgG by enzyme-linked immunosorbent assay and results were expressed in arbitrary units (AU). 147/252 samples were collected in 2021 during a blood-stage malaria vaccine trial [ClinicalTrials.gov NCT04318002], and 105/252 were archived samples of malaria vaccine trial conducted in 2012 [ClinicalTrials.gov NCT00866619]. Malaria incidence was calculated from outpatient clinic data of malaria rapid test or blood smear positive results retrieved from District-Health-Information-Software-2 (DHIS2) between 2013 and 2020. Cross-sectional data from both studies were analysed using STATA version 14. Results this study demonstrated a decline in total anti-schizont IgG levels from 490.21AU in 2012 to 97.07AU in 2021 which was related to a fall in incidence from 58.25 cases/1000 person-year in 2013 to 14.28 cases/1000 person-year in 2020. We also observed a significant difference in incidence when comparing high and low malaria transmission areas and by gender. However, we did not observe differences when comparing total anti-schizont antibodies by gender and study year. Conclusion total anti-schizont antibody levels appear to be an important serological marker of exposure for assessing the dynamic of malaria transmission in infants living in malaria-endemic regions.
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Affiliation(s)
- Tunu Guntram Mwamlima
- Ifakara Health Institute, Bagamoyo, Tanzania
- Department of Life Science and Bio-Engineering, The Nelson Mandela African Institution of Science and Technology, Arusha, Tanzania
- Corresponding author: Tunu Guntram Mwamlima, Ifakara Health Institute, Bagamoyo, Tanzania.
| | | | | | | | | | | | | | - Simon John Draper
- Department of Biochemistry, University of Oxford, Oxford OX1 3QU, United Kingdom
| | | | | | - John-Mary Vianney
- Department of Life Science and Bio-Engineering, The Nelson Mandela African Institution of Science and Technology, Arusha, Tanzania
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25
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Madkhali AM, Abdulhaq AA, Atroosh WM, Ghzwani AH, Zain KA, Ghailan KY, Hamali HA, Mobarki AA, Eisa ZM, Lau YL, Al-Mekhlafi HM. The return of chloroquine-sensitive Plasmodium falciparum parasites in Jazan region, southwestern Saudi Arabia over a decade after the adoption of artemisinin-based combination therapy: analysis of genetic mutations in the pfcrt gene. Parasitol Res 2021; 120:3771-3781. [PMID: 34561749 DOI: 10.1007/s00436-021-07323-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2021] [Accepted: 09/15/2021] [Indexed: 11/25/2022]
Abstract
This study investigated the polymorphism in the P. falciparum chloroquine resistance transporter (pfcrt) gene 11 years after chloroquine (CQ) cessation in Jazan region, southwestern Saudi Arabia. Two hundred and thirty-five P. falciparum isolates were amplified to detect mutations in the pfcrt gene. The pfcrt 76 T molecular marker for CQ resistance was detected in 66.4% (156/235) of the isolates, while the K76 CQ-sensitive wild type was detected in 33.6%. The pfcrt 74I and pfcrt 75E point mutations were each found to be present in 56.2% of isolates, while only four isolates (1.7%) were found to carry the pfcrt 72S mutation. Moreover, four pfcrt haplotypes were identified as follows: the CVIET triple-allele (56.2%), SVMET double-allele (1.7%) and CVMNT single-allele (8.5%) mutant haplotypes and the CVMNK wild haplotype (33.6%). The analysis also revealed significant associations between the prevalence of mutant pfcrt alleles and haplotypes and the age group, governorate and nationality of the patients as well as the parasitaemia level (p < 0.05). The findings provide evidence of the potential re-emergence of CQ-susceptible P. falciparum strains in Jazan region over a decade after CQ discontinuation, with about one third of the isolates analysed carrying the pfcrt K76 CQ-sensitive wild allele and the CVMNK ancestral wild haplotype. Although the reintroduction of CQ cannot be recommended at present in Saudi Arabia, these findings support the rationale for a potential future role for CQ in malaria treatment. Therefore, continuous molecular and in vitro monitoring mutations of pfcrt polymorphism in Jazan region is highly recommended.
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Affiliation(s)
- Aymen M Madkhali
- Department of Medical Laboratory Technology, Faculty of Applied Medical Sciences, Jazan University, Jazan, Kingdom of Saudi Arabia.,Medical Research Centre, Jazan University, Jazan, Kingdom of Saudi Arabia
| | - Ahmed A Abdulhaq
- Department of Medical Laboratory Technology, Faculty of Applied Medical Sciences, Jazan University, Jazan, Kingdom of Saudi Arabia
| | - Wahib M Atroosh
- Department of Parasitology, Faculty of Medicine, University of Malaya, 50603, Kuala Lumpur, Malaysia.,Department of Microbiology and Parasitology, Faculty of Medicine and Health Sciences, University of Aden, Aden, Yemen
| | | | - Khalid Ammash Zain
- Medical Research Centre, Jazan University, Jazan, Kingdom of Saudi Arabia
| | - Khalid Y Ghailan
- Faculty of Public Health and Tropical Medicine, Jazan University, Jazan, Kingdom of Saudi Arabia
| | - Hassan A Hamali
- Department of Medical Laboratory Technology, Faculty of Applied Medical Sciences, Jazan University, Jazan, Kingdom of Saudi Arabia
| | - Abdullah A Mobarki
- Department of Medical Laboratory Technology, Faculty of Applied Medical Sciences, Jazan University, Jazan, Kingdom of Saudi Arabia
| | - Zaki M Eisa
- Saudi Centre for Disease Prevention and Control, Ministry of Health, Jazan, Kingdom of Saudi Arabia
| | - Yee-Ling Lau
- Department of Parasitology, Faculty of Medicine, University of Malaya, 50603, Kuala Lumpur, Malaysia
| | - Hesham M Al-Mekhlafi
- Medical Research Centre, Jazan University, Jazan, Kingdom of Saudi Arabia. .,Department of Parasitology, Faculty of Medicine, University of Malaya, 50603, Kuala Lumpur, Malaysia. .,Department of Parasitology, Faculty of Medicine and Health Sciences, Sana'a University, Sana'a, Yemen.
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Suspected Severe Malaria in a Sudanese Patient Affected by Sickle Cell Disease Who Was Treated with Hydroxyurea. Pathogens 2021; 10:pathogens10080985. [PMID: 34451449 PMCID: PMC8398986 DOI: 10.3390/pathogens10080985] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2021] [Revised: 07/27/2021] [Accepted: 08/03/2021] [Indexed: 11/21/2022] Open
Abstract
Sickle cell disease (SCD) is the most common genetic disease in sub-Saharan Africa. The signs and symptoms of SCD usually begin in early childhood. Characteristic features of this disorder include anaemia, repeated infections, and periodic episodes of pain. Malaria is one of the infections that can occur in patients with SCD in endemic countries. Many guidelines recommend antimalarial chemoprophylaxis in these patients, although the debate on which drug should be used is still ongoing. Hydroxyurea (HU), which is considered a safe and effective treatment for both children and adults with SCD, seems to affect the incidence and severity of malaria, although these impacts have yet to be fully demonstrated. We report a case of an eight-and-a-half-year-old Sudanese boy with SCD treated with HU admitted for suspected severe malaria who showed a recrudescence after first-line treatment. Although he had undergone splenectomy and thus belonged to a category of patients at high risk for infectious complications, he was not receiving any malaria chemoprophylaxis. This case emphasises the importance of the routine administration of malaria prophylaxis to children with SCD living in endemic areas, even when they are treated with HU, and especially if they are at high risk for infectious complications because they have undergone splenectomy. There is an urgent need for further research to evaluate the most appropriate regimen and its optimal duration.
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