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Amanzougaghene N, Tajeri S, Franetich JF, Ashraf K, Soulard V, Bigeard P, Guindo CO, Bouillier C, Lemaitre J, Relouzat F, Legrand R, Kocken CHM, Zeeman AM, Roobsoong W, Sattabongkot J, Zhaoqing Y, Snounou G, Mazier D. Azithromycin disrupts apicoplast biogenesis in replicating and dormant liver stages of the relapsing malaria parasites Plasmodium vivax and P. cynomolgi. Int J Antimicrob Agents 2024:107112. [PMID: 38367843 DOI: 10.1016/j.ijantimicag.2024.107112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2023] [Revised: 01/31/2024] [Accepted: 02/08/2024] [Indexed: 02/19/2024]
Abstract
The control and elimination of malaria caused by Plasmodium vivax is hampered by the threat of relapse infection resulting from the activation of dormant hepatic hypnozoites. Currently, only the 8-aminoquinolines, primaquine and tafenoquine, have been approved for the elimination of hypnozoites, though their use is hampered by potential toxicity. Therefore, an alternative radical curative drug that safely eliminates hypnozoites is a pressing need. In this study, we assessed the potential hypnozoiticidal activity of the antibiotic azithromycin, which is thought to exert antimalarial activity by inhibiting prokaryote-like ribosomal translation, within the apicoplast, an indispensable organelle. Our results show that azithromycin inhibited apicoplast development during P. vivax and P. cynomolgi liver-stage schizogony leading to impaired parasite maturation. More importantly, we show that azithromycin is likely to impair the hypnozoite's apicoplast resulting in the loss of this organelle. Subsequently, by using a recently developed long-term hepatocyte culture system, we found that this loss probably induces a delay in the hypnozoite activation rate and that those parasites that do proceed to schizogony display liver stage arrest prior to differentiating into hepatic merozoites, thus, potentially preventing relapses. Altogether, this work provides evidence for the potential use of azithromycin for the radical cure of relapsing malaria and identifies apicoplast functions as potential drug targets in quiescent hypnozoites.
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Affiliation(s)
- Nadia Amanzougaghene
- Sorbonne Université, INSERM, CNRS, Centre d'Immunologie et des Maladies Infectieuses, CIMI-Paris, Paris, France; Université Paris-Saclay, Inserm, CEA, Immunologie des maladies virales, auto-immunes, hématologiques et bactériennes (IMVA-HB/IDMIT/UMR1184), 92265, Fontenay-aux-Roses & Kremlin-Bicêtre, France
| | - Shahin Tajeri
- Sorbonne Université, INSERM, CNRS, Centre d'Immunologie et des Maladies Infectieuses, CIMI-Paris, Paris, France
| | - Jean-François Franetich
- Sorbonne Université, INSERM, CNRS, Centre d'Immunologie et des Maladies Infectieuses, CIMI-Paris, Paris, France
| | - Kutub Ashraf
- Sorbonne Université, INSERM, CNRS, Centre d'Immunologie et des Maladies Infectieuses, CIMI-Paris, Paris, France
| | - Valérie Soulard
- Sorbonne Université, INSERM, CNRS, Centre d'Immunologie et des Maladies Infectieuses, CIMI-Paris, Paris, France
| | - Pierre Bigeard
- Sorbonne Université, INSERM, CNRS, Centre d'Immunologie et des Maladies Infectieuses, CIMI-Paris, Paris, France
| | - Cheick Oumar Guindo
- Sorbonne Université, INSERM, CNRS, Centre d'Immunologie et des Maladies Infectieuses, CIMI-Paris, Paris, France
| | - Camille Bouillier
- Université Paris-Saclay, Inserm, CEA, Immunologie des maladies virales, auto-immunes, hématologiques et bactériennes (IMVA-HB/IDMIT/UMR1184), 92265, Fontenay-aux-Roses & Kremlin-Bicêtre, France
| | - Julien Lemaitre
- Université Paris-Saclay, Inserm, CEA, Immunologie des maladies virales, auto-immunes, hématologiques et bactériennes (IMVA-HB/IDMIT/UMR1184), 92265, Fontenay-aux-Roses & Kremlin-Bicêtre, France
| | - Francis Relouzat
- Université Paris-Saclay, Inserm, CEA, Immunologie des maladies virales, auto-immunes, hématologiques et bactériennes (IMVA-HB/IDMIT/UMR1184), 92265, Fontenay-aux-Roses & Kremlin-Bicêtre, France
| | - Roger Legrand
- Université Paris-Saclay, Inserm, CEA, Immunologie des maladies virales, auto-immunes, hématologiques et bactériennes (IMVA-HB/IDMIT/UMR1184), 92265, Fontenay-aux-Roses & Kremlin-Bicêtre, France
| | - Clemens H M Kocken
- Department of Parasitology, Biomedical Primate Research Centre, Rijswijk, Netherlands
| | - Anne-Marie Zeeman
- Department of Parasitology, Biomedical Primate Research Centre, Rijswijk, Netherlands
| | - 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
| | - Yang Zhaoqing
- Department of Pathogen Biology and Immunology, Kunming Medical University, Yuhu Street,1168 West Chunrong Road,Chenggong New Town, Kunming, Yunnan Province, China, 650500
| | - Georges Snounou
- Université Paris-Saclay, Inserm, CEA, Immunologie des maladies virales, auto-immunes, hématologiques et bactériennes (IMVA-HB/IDMIT/UMR1184), 92265, Fontenay-aux-Roses & Kremlin-Bicêtre, France..
| | - Dominique Mazier
- Sorbonne Université, INSERM, CNRS, Centre d'Immunologie et des Maladies Infectieuses, CIMI-Paris, Paris, France.
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Thongpoon S, Roobsoong W, Nguitragool W, Chotirat S, Tsuboi T, Takashima E, Cui L, Ishino T, Tachibana M, Miura K, Sattabongkot J. Naturally Acquired Transmission-Blocking Immunity Against Different Strains of Plasmodium vivax in a Malaria-Endemic Area in Thailand. J Infect Dis 2024; 229:567-575. [PMID: 37943633 PMCID: PMC10873188 DOI: 10.1093/infdis/jiad469] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2023] [Revised: 09/30/2023] [Accepted: 11/04/2023] [Indexed: 11/12/2023] Open
Abstract
BACKGROUND Human immunity triggered by natural malaria infections impedes parasite transmission from humans to mosquitoes, leading to interest in transmission-blocking vaccines. However, immunity characteristics, especially strain specificity, remain largely unexplored. We investigated naturally acquired transmission-blocking immunity (TBI) against Plasmodium vivax, a major malaria parasite. METHODS Using the direct membrane-feeding assay, we assessed TBI in plasma samples and examined the role of antibodies by removing immunoglobulins through protein G/L adsorption before mosquito feeding. Strain specificity was evaluated by conducting a direct membrane-feeding assay with plasma exchange. RESULTS Blood samples from 47 patients with P vivax were evaluated, with 37 plasma samples successfully infecting mosquitoes. Among these, 26 showed inhibition before immunoglobulin depletion. Despite substantial immunoglobulin removal, 4 samples still exhibited notable inhibition, while 22 had reduced blocking activity. Testing against heterologous strains revealed some plasma samples with broad TBI and others with strain-specific TBI. CONCLUSIONS Our findings indicate that naturally acquired TBI is mainly mediated by antibodies, with possible contributions from other serum factors. The transmission-blocking activity of plasma samples varied by the tested parasite strain, suggesting single polymorphic or multiple targets for naturally acquired TBI. These observations improve understanding of immunity against P vivax and hold implications for transmission-blocking vaccine development.
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Affiliation(s)
| | | | - Wang Nguitragool
- Department of Molecular Tropical Medicine and Genetics, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | | | - Takafumi Tsuboi
- Division of Malaria Research, Proteo-Science Center, Ehime University, Matsuyama, Japan
| | - Eizo Takashima
- Division of Malaria Research, Proteo-Science Center, Ehime University, Matsuyama, Japan
| | - Liwang Cui
- Department of Internal Medicine, Morsani College of Medicine, University of South Florida, Tampa, FL, USA
| | - Tomoko Ishino
- Department of Parasitology and Tropical Medicine, Tokyo Medical and Dental University, Tokyo, Japan
| | - Mayumi Tachibana
- Division of Molecular Parasitology, Proteo-Science Center, Ehime University, Toon, Ehime, Japan
| | - Kazutoyo Miura
- Laboratory of Malaria and Vector Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, Maryland, USA
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Winnicki AC, Dietrich MH, Yeoh LM, Carias LL, Roobsoong W, Drago CL, Malachin AN, Redinger KR, Feufack-Donfack LB, Baldor L, Jung NC, McLaine OS, Skomorovska-Prokvolit Y, Orban A, Opi DH, Sattabongkot J, Tham WH, Popovici J, Beeson JG, Bosch J, King CL. Potent AMA1-specific human monoclonal antibody against P. vivax Pre-erythrocytic and Blood Stages. bioRxiv 2024:2024.02.07.579302. [PMID: 38370683 PMCID: PMC10871283 DOI: 10.1101/2024.02.07.579302] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/20/2024]
Abstract
New therapeutics are a priority for preventing and eliminating Plasmodium vivax (Pv) malaria because of its easy transmissibility and dormant stages in the liver. Relapses due to the dormant liver stages are the major contributor to reoccurring Pv. Therefore, therapies that reduce the establishment of dormant parasites and blood-stage infection are important for controlling this geographically widespread parasite. Here, we isolated 12 human monoclonal antibodies (humAbs) from the plasma of a Pv-exposed individual that recognized Pv apical membrane antigen 1 (PvAMA1). PvAMA1 is important for both sporozoite invasion of hepatocytes and merozoite invasion of reticulocytes. We identified one humAb, 826827, that blocked invasion of human erythrocytes using a transgenic P. falciparum line expressing PvAMA1 (IC 50 = 3 µg/mL) and all Pv clinical isolates in vitro . This humAb also inhibited sporozoite invasion of a human hepatocyte cell line and primary human hepatocytes (IC 50 of 0.3 - 3.7 µg/mL). The crystal structure of recombinant PvAMA1 with the antigen-binding fragment of 826827 at 2.4 Å resolution shows that the humAb partially occupies the highly conserved hydrophobic groove in PvAMA1 that binds its known receptor, RON2. HumAb 826827 binds to PvAMA1 with higher affinity than RON2, accounting for its potency. To our knowledge, this is the first reported humAb specific to PvAMA1, and the PvAMA1 residues it binds to are highly conserved across different isolates, explaining its strain-transcendent properties.
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Assawapanumat W, Roobsoong W, Chotivanich K, Sattabongkot J, Kampaengtip A, Sungkarat W, Sunintaboon P, Nasongkla N. In Vitro Tracking of Sporozoites via Fluorescence Imaging and MRI Using Multifunctional Micelles. ACS Appl Bio Mater 2023; 6:5324-5332. [PMID: 38039355 DOI: 10.1021/acsabm.3c00596] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2023]
Abstract
Early detection could increase the treatment efficiency and prevent the recurrence of malaria disease. To track and detect malarial sporozoites, novel drug delivery systems have been explored for their ability to target these parasites specifically. This study investigates the potential of micelles to track Plasmodium vivax by targeting the Plasmodium vivax hexose transporter using glucose-based interactions. In vitro experiments were conducted using glucose/SPIO/Nile red (targeted) micelles and methoxy/SPIO/Nile red (nontargeted) micelles, revealing that the targeted micelles exhibited stronger fluorescence with the sporozoites and higher relative R2* values compared to the nontargeted micelles. These findings suggest that targeted micelles could be used for the specific detection of Plasmodium sporozoites using fluorescence imaging and MRI techniques, offering a promising approach for efficient malaria parasite detection.
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Affiliation(s)
- Wirat Assawapanumat
- Department of Biomedical Engineering, Faculty of Engineering, Mahidol University, Nakhon Pathom 73170, Thailand
| | - Wanlapa Roobsoong
- Mahidol Vivax Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok 10400, Thailand
| | - Kesinee Chotivanich
- Department of Clinical Tropical Medicine, Faculty of Tropical Medicine, Mahidol University, Bangkok 10400, Thailand
| | - Jetsumon Sattabongkot
- Mahidol Vivax Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok 10400, Thailand
| | - Adun Kampaengtip
- Department of Radiology, Faculty of Medicine Ramathibodi Hospital, Mahidol University, Bangkok 10400, Thailand
| | - Witaya Sungkarat
- Department of Radiology, Faculty of Medicine Ramathibodi Hospital, Mahidol University, Bangkok 10400, Thailand
- Faculty of Health Science Technology, Chulabhorn Royal Academy, Bangkok 10210, Thailand
| | - Panya Sunintaboon
- Department of Chemistry, Faculty of Science, Mahidol University, Nakhon Pathom 73170, Thailand
| | - Norased Nasongkla
- Department of Biomedical Engineering, Faculty of Engineering, Mahidol University, Nakhon Pathom 73170, Thailand
- Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Mahidol University, Bangkok 10400, Thailand
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5
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Glennon EK, Wei L, Roobsoong W, Primavera VI, Tongogara T, Yee CB, Sattabongkot J, Kaushansky A. Host kinase regulation of Plasmodium vivax dormant and replicating liver stages. bioRxiv 2023:2023.11.13.566868. [PMID: 38014051 PMCID: PMC10680662 DOI: 10.1101/2023.11.13.566868] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2023]
Abstract
Upon transmission to the liver, Plasmodium vivax parasites form replicating schizonts, which continue to initiate blood-stage infection, or dormant hypnozoites that reactivate weeks to months after initial infection. P. vivax phenotypes in the field vary significantly, including the ratio of schizonts to hypnozoites formed and the frequency and timing of relapse. Evidence suggests that both parasite genetics and environmental factors underly this heterogeneity. We previously demonstrated that data on the effect of a panel of kinase inhibitors with overlapping targets on Plasmodium liver stage infection, in combination with a computational approach called kinase regression (KiR), can be used to uncover novel host regulators of infection. Here, we applied KiR to evaluate the extent to which P. vivax liver-stage parasites are susceptible to changes in host kinase activity. We identified a role for a subset of host kinases in regulating schizont and hypnozoite infection and schizont size and characterized overlap as well as variability in host phosphosignaling dependencies between parasite forms and across multiple patient isolates. Striking, our data point to variability in host dependencies across P. vivax isolates, suggesting one possible origin of the heterogeneity observed across P. vivax in the field.
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Rodríguez-Hernández D, Vijayan K, Zigweid R, Fenwick MK, Sankaran B, Roobsoong W, Sattabongkot J, Glennon EKK, Myler PJ, Sunnerhagen P, Staker BL, Kaushansky A, Grøtli M. Identification of potent and selective N-myristoyltransferase inhibitors of Plasmodium vivax liver stage hypnozoites and schizonts. Nat Commun 2023; 14:5408. [PMID: 37669940 PMCID: PMC10480161 DOI: 10.1038/s41467-023-41119-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2023] [Accepted: 08/22/2023] [Indexed: 09/07/2023] Open
Abstract
Drugs targeting multiple stages of the Plasmodium vivax life cycle are needed to reduce the health and economic burdens caused by malaria worldwide. N-myristoyltransferase (NMT) is an essential eukaryotic enzyme and a validated drug target for combating malaria. However, previous PvNMT inhibitors have failed due to their low selectivity over human NMTs. Herein, we apply a structure-guided hybridization approach combining chemical moieties of previously reported NMT inhibitors to develop the next generation of PvNMT inhibitors. A high-resolution crystal structure of PvNMT bound to a representative selective hybrid compound reveals a unique binding site architecture that includes a selective conformation of a key tyrosine residue. The hybridized compounds significantly decrease P. falciparum blood-stage parasite load and consistently exhibit dose-dependent inhibition of P. vivax liver stage schizonts and hypnozoites. Our data demonstrate that hybridized NMT inhibitors can be multistage antimalarials, targeting dormant and developing forms of liver and blood stage.
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Affiliation(s)
- Diego Rodríguez-Hernández
- Department of Chemistry and Molecular Biology, University of Gothenburg; S-405 30, Gothenburg, Sweden
- Department of Chemistry, University of Bergen, Allegaten 41, NO-5007, Bergen, Norway
| | - Kamalakannan Vijayan
- Center for Global Infectious Disease Research, Seattle Children's Research Institute, Seattle, WA, 98109, USA
- School of Biology, Indian Institute of Science Education and Research, Thiruvananthapuram, Kerala, 695551, India
| | - Rachael Zigweid
- Center for Global Infectious Disease Research, Seattle Children's Research Institute, Seattle, WA, 98109, USA
- Seattle Structural Genomics Center for Infectious Disease, Seattle, WA, 98109, USA
| | - Michael K Fenwick
- Center for Global Infectious Disease Research, Seattle Children's Research Institute, Seattle, WA, 98109, USA
- Seattle Structural Genomics Center for Infectious Disease, Seattle, WA, 98109, USA
| | - Banumathi Sankaran
- Molecular Biophysics and Integrated Bioimaging, Berkeley Center for Structural Biology, Advanced Light Source; Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - 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
| | - Elizabeth K K Glennon
- Center for Global Infectious Disease Research, Seattle Children's Research Institute, Seattle, WA, 98109, USA
| | - Peter J Myler
- Center for Global Infectious Disease Research, Seattle Children's Research Institute, Seattle, WA, 98109, USA
- Seattle Structural Genomics Center for Infectious Disease, Seattle, WA, 98109, USA
- Department of Pediatrics, University of Washington, Seattle, WA, 98195, USA
| | - Per Sunnerhagen
- Department of Chemistry and Molecular Biology, University of Gothenburg; S-405 30, Gothenburg, Sweden
| | - Bart L Staker
- Center for Global Infectious Disease Research, Seattle Children's Research Institute, Seattle, WA, 98109, USA
- Seattle Structural Genomics Center for Infectious Disease, Seattle, WA, 98109, USA
| | - Alexis Kaushansky
- Center for Global Infectious Disease Research, Seattle Children's Research Institute, Seattle, WA, 98109, USA.
- Department of Pediatrics, University of Washington, Seattle, WA, 98195, USA.
| | - Morten Grøtli
- Department of Chemistry and Molecular Biology, University of Gothenburg; S-405 30, Gothenburg, Sweden.
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Aung TH, Suansomjit C, Tun ZM, Hlaing TM, Kaewkungwal J, Cui L, Sattabongkot J, Roobsoong W. Prevalence of G6PD deficiency and diagnostic accuracy of a G6PD point-of-care test among a population at risk of malaria in Myanmar. Malar J 2023; 22:143. [PMID: 37127600 PMCID: PMC10150473 DOI: 10.1186/s12936-023-04559-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2022] [Accepted: 04/11/2023] [Indexed: 05/03/2023] Open
Abstract
BACKGROUND Over the past decade, the incidence of malaria has steadily declined in Myanmar, with Plasmodium vivax becoming predominant. The resilience of P. vivax to malaria control is attributed to the parasite's ability to form hypnozoites in the host's liver, which can cause relapse. Primaquine is used to eliminate hypnozoites but can cause haemolysis in glucose-6-phosphate dehydrogenase (G6PD)-deficient individuals. It is thus necessary to estimate the frequency and variant types of G6PD deficiency in areas where primaquine will be widely used for P. vivax elimination. METHODS In this study, a descriptive cross-sectional survey was conducted to determine the prevalence of G6PD deficiency in a population residing in Nay Pyi Taw, Myanmar, using a standard spectrophotometric assay, a rapid diagnostic test (RDT), Biosensor, and by genotyping G6PD variants. RESULTS G6PD enzyme activity was determined from 772 leukocyte-depleted samples, with an adjusted male median G6PD activity value of 6.3 U/g haemoglobin. Using a cut-off value of 30% enzyme activity, the overall prevalence of G6PD deficiency was 10.8%. Genotyping of G6PD variants was performed for 536 samples, of which 131 contained mutations. The Mahidol variant comprised the majority, and males with the Mahidol variant showed lower G6PD enzyme activity. The G6PD Andalus variant, which has not been reported in Myanmar before, was also identified in this study. CONCLUSION This study provides a G6PD enzyme activity reference value for the Myanmar population and further information on the prevalence and variants of G6PD deficiency among the Myanmar population; it also evaluates the feasibility of G6PD deficiency tests.
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Affiliation(s)
- Than Htike Aung
- Mahidol Vivax Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
- Defence Services Medical Academy, Yangon, Myanmar
| | - Chayanut Suansomjit
- Mahidol Vivax Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Zaw Min Tun
- Defence Services Medical Research Centre, Nay Pyi Taw, Myanmar
| | | | - Jaranit Kaewkungwal
- Department of Tropical Hygiene, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Liwang Cui
- Division of Infectious Diseases and International Medicine, Department of Internal Medicine, Morsani College of Medicine, University of South Florida, Florida, USA
| | - Jetsumon Sattabongkot
- Mahidol Vivax Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Wanlapa Roobsoong
- Mahidol Vivax Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand.
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Thongbamrer C, Teerakantrakorn P, Nongpong U, Apiratikul N, Roobsoong W, Kunkeaw N, Nguitragool W, Sattabongkot J, Yingyongnarongkul BE. In vitro transfection efficiencies of T-shaped spermine-based cationic lipids with identical and nonidentical tails under high serum conditions. Org Biomol Chem 2023; 21:1967-1979. [PMID: 36762533 DOI: 10.1039/d2ob02129c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
T-shaped spermine-based cationic lipids with identical and nonidentical hydrophobic tails having variable carbon lengths (from C10 to C18) were designed and synthesized. These lipids were characterized, and their structure-activity relationships were determined for DNA binding and transfection ability of these compounds when formulated as cationic liposomes. These liposomes were then applied as non-viral vectors to transfect HEK293T, HeLa, PC3, H460, HepG2, and Calu'3 cell lines with plasmid DNA encoding the green fluorescent protein. ST9, ST12 and ST13 with nonidentical tails could deliver DNA into HEK293T cells up to 60% under serum-free conditions. The lipid ST15 bearing nonidentical tails was found to be a potent gene transfer agent under 40% serum conditions in HEK293T and HeLa cells. Besides their low cytotoxicity, these lipoplexes also exhibited greater transfection efficiency than the commercially available transfection agent, Lipofectamine 3000.
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Affiliation(s)
- Chopaka Thongbamrer
- Department of Chemistry and Center of Excellence for Innovation in Chemistry (PERCH-CIC), Faculty of Science, Ramkhamhaeng University, Bangkapi, Bangkok, 10240 Thailand
| | - Purichaya Teerakantrakorn
- Bodindecha (Sing Singhaseni) School, 40 Ramkhamhaeng 43/1, Plabpla Wangthonglang, Bangkok, 10310 Thailand.
| | - Ussanee Nongpong
- Bodindecha (Sing Singhaseni) School, 40 Ramkhamhaeng 43/1, Plabpla Wangthonglang, Bangkok, 10310 Thailand.
| | - Nuttapon Apiratikul
- Department of Chemistry and Center of Excellence for Innovation in Chemistry (PERCH-CIC), Faculty of Science, Srinakharinwirot University, Bangkok 10110, Thailand
| | - Wanlapa Roobsoong
- Mahidol Vivax Research Unit, Faculty of Tropical Medicine, Mahidol University, Ratchathewi, Bangkok, 10400 Thailand
| | - Nawapol Kunkeaw
- Mahidol Vivax Research Unit, Faculty of Tropical Medicine, Mahidol University, Ratchathewi, Bangkok, 10400 Thailand
| | - Wang Nguitragool
- Department of Molecular Tropical Medicine and Genetics, Faculty of Tropical Medicine, Mahidol University, Bangkok, 10400 Thailand
| | - Jetsumon Sattabongkot
- Mahidol Vivax Research Unit, Faculty of Tropical Medicine, Mahidol University, Ratchathewi, Bangkok, 10400 Thailand
| | - Boon-Ek Yingyongnarongkul
- Department of Chemistry and Center of Excellence for Innovation in Chemistry (PERCH-CIC), Faculty of Science, Ramkhamhaeng University, Bangkapi, Bangkok, 10240 Thailand
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9
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Surit T, Sripoorote P, Kumpitak C, Suansomjit C, Maneechai N, Cui L, Sattabongkot J, Roobsoong W, Nguitragool W. Transmission efficiency of Plasmodium vivax at low parasitaemia. Malar J 2023; 22:22. [PMID: 36658583 PMCID: PMC9854148 DOI: 10.1186/s12936-022-04435-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2022] [Accepted: 12/27/2022] [Indexed: 01/20/2023] Open
Abstract
BACKGROUND Plasmodium vivax is responsible for much of malaria outside Africa. Although most P. vivax infections in endemic areas are asymptomatic and have low parasite densities, they are considered a potentially important source of transmission. Several studies have demonstrated that asymptomatic P. vivax carriers can transmit the parasite to mosquitoes, but the efficiency has not been well quantified. The aim of this study is to determine the relationship between parasite density and mosquito infectivity, particularly at low parasitaemia. METHODS Membrane feeding assays were performed using serial dilutions of P. vivax-infected blood to define the relationship between parasitaemia and mosquito infectivity. RESULTS The infection rate (oocyst prevalence) and intensity (oocyst load) were positively correlated with the parasite density in the blood. There was a broad case-to-case variation in parasite infectivity. The geometric mean parasite density yielding a 10% mosquito infection rate was 33 (CI 95 9-120) parasites/µl or 4 (CI 95 1-17) gametocytes/µl. The geometric mean parasite density yielding a 50% mosquito infection rate was 146 (CI 95 36-586) parasites/µl or 13 (CI 95 3-49) gametocytes/µl. CONCLUSION This study quantified the ability of P. vivax to infect Anopheles dirus at over a broad range of parasite densities. It provides important information about parasite infectivity at low parasitaemia common among asymptomatic P. vivax carriers.
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Affiliation(s)
- Thitiporn Surit
- Mahidol Vivax Research Unit, Faculty of Tropical Medicine, Mahidol University, 420/6 Ratchawithi Rd, Ratchathewi, Bangkok, 10400, Thailand
- Department of Clinical Tropical Medicine, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Piyarat Sripoorote
- Mahidol Vivax Research Unit, Faculty of Tropical Medicine, Mahidol University, 420/6 Ratchawithi Rd, Ratchathewi, Bangkok, 10400, Thailand
| | - Chalermpon Kumpitak
- Mahidol Vivax Research Unit, Faculty of Tropical Medicine, Mahidol University, 420/6 Ratchawithi Rd, Ratchathewi, Bangkok, 10400, Thailand
| | - Chayanut Suansomjit
- Mahidol Vivax Research Unit, Faculty of Tropical Medicine, Mahidol University, 420/6 Ratchawithi Rd, Ratchathewi, Bangkok, 10400, Thailand
| | - Nongnuj Maneechai
- Mahidol Vivax Research Unit, Faculty of Tropical Medicine, Mahidol University, 420/6 Ratchawithi Rd, Ratchathewi, Bangkok, 10400, Thailand
| | - Liwang Cui
- Department of Internal Medicine, Morsani College of Medicine, University of South Florida, Tampa, FL, 33612, USA
| | - Jetsumon Sattabongkot
- Mahidol Vivax Research Unit, Faculty of Tropical Medicine, Mahidol University, 420/6 Ratchawithi Rd, Ratchathewi, Bangkok, 10400, Thailand
| | - Wanlapa Roobsoong
- Mahidol Vivax Research Unit, Faculty of Tropical Medicine, Mahidol University, 420/6 Ratchawithi Rd, Ratchathewi, Bangkok, 10400, Thailand.
| | - Wang Nguitragool
- Mahidol Vivax Research Unit, Faculty of Tropical Medicine, Mahidol University, 420/6 Ratchawithi Rd, Ratchathewi, Bangkok, 10400, Thailand.
- Department of Molecular Tropical Medicine and Genetics, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand.
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10
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Saita S, Roobsoong W, Khammaneechan P, Sukchan P, Lawpoolsri S, Sattabongkot J, Cui L, Okanurak K, Phuanukoonnon S, Parker DM. Community acceptability, participation, and adherence to mass drug administration with primaquine for Plasmodium vivax elimination in Southern Thailand: a mixed methods approach. Malar J 2023; 22:17. [PMID: 36635642 PMCID: PMC9837991 DOI: 10.1186/s12936-023-04443-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2022] [Accepted: 01/04/2023] [Indexed: 01/14/2023] Open
Abstract
BACKGROUND Mass drug administration (MDA) with primaquine (PQ) is being considered for accelerating Plasmodium vivax elimination in remaining active foci. This study aimed to determine the acceptability of MDA with PQ in malaria endemic villages in a malarious setting in the South of Thailand undergoing MDA with PQ. METHODS A cross-sectional mixed-methods approach was conducted in seven malaria endemic villages where MDA with PQ was implemented. The data were collected from community villagers and health workers using structured questionnaires, in-depth interviews, and focus group discussions. Descriptive statistics and logistic regression models were used for quantitative data analysis. Thematic analysis was applied for qualitative data. RESULTS Among a total of 469 participants from the MDA villages, 293 participants were eligible for MDA with PQ and 79.86% (234) completed 14-days of PQ. The logistic regressions indicated that males (adjusted odds ratio: 2.52 [95% confidence interval: 1.33-4.81]) and those who are farmers (2.57 [1.12-5.90]) were most likely to participate in the MDA. Among 293 participants in the post-MDA study, 74.06% had originally agreed to participate in the MDA with PQ while 25.94% had originally reported not wanting to participate in the MDA. Of those who originally reported being willing to participate in the MDA, 71.23% followed through with participation in the first or second round. Conversely, 93.24% of those who originally reported not being willing to participate in the MDA did in fact participate in the MDA. Factors contributing to higher odds of agreeing to participate and following through with participation included being male (1.98 [1.06-3.69]) and correctly responding that malaria is preventable (2.32 [1.01-5.35]) with some differences by village. Five key themes emerged from the qualitative analyses: concern about side effects from taking PQ; disbelief that malaria could be eliminated in this setting; low overall concern about malaria infections; misunderstandings about malaria; and a general need to tailor public health efforts for this unique context. CONCLUSION While the reported likelihood of participating in MDA was high in this setting, actual follow-through was relatively moderate, partially because of eligibility (roughly 71% of those in the follow-up survey who originally agreed to participate actually followed through with participation). One of the largest concerns among study participants was PQ-related side effects-and these concerns likely heavily influenced participant adherence to the MDA. The results of this study can be used to tailor future MDAs, or other public health interventions, in this and potentially other similar settings.
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Affiliation(s)
- Sayambhu Saita
- grid.412434.40000 0004 1937 1127Faculty of Public Health, Thammasat University, Lampang, Thailand ,grid.412434.40000 0004 1937 1127Thammasat University Research Unit in One Health and Ecohealth, Thammasat University, Pathum Thani, Thailand
| | - Wanlapa Roobsoong
- grid.10223.320000 0004 1937 0490Mahidol Vivax Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Patthanasak Khammaneechan
- grid.412867.e0000 0001 0043 6347Excellence Center for DACH, Walailak University, Nakhon Si Thammarat, Thailand
| | - Phnom Sukchan
- grid.444076.50000 0004 0388 8009Faculty of Medicine, Princess of Naradhiwas University, Narathiwat, Thailand
| | - Saranath Lawpoolsri
- grid.10223.320000 0004 1937 0490Department of Tropical Hygiene, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Jetsumon Sattabongkot
- grid.10223.320000 0004 1937 0490Mahidol Vivax Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Liwang Cui
- grid.170693.a0000 0001 2353 285XDivision of Infectious Diseases and Internal Medicine, Department of Internal Medicine, University of South Florida, Tampa, FL USA
| | - Kamolnetr Okanurak
- grid.10223.320000 0004 1937 0490Department of Social and Environmental Medicine, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Suparat Phuanukoonnon
- grid.10223.320000 0004 1937 0490Department of Social and Environmental Medicine, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Daniel M. Parker
- grid.266093.80000 0001 0668 7243Department of Population Health and Disease Prevention, University of California, Irvine, USA ,grid.266093.80000 0001 0668 7243Department of Epidemiology and Biostatistics, University of California, Irvine, USA
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11
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Roobsoong W, Yadava A, Draper SJ, Minassian AM, Sattabongkot J. The challenges of Plasmodium vivax human malaria infection models for vaccine development. Front Immunol 2023; 13:1006954. [PMID: 36685545 PMCID: PMC9849360 DOI: 10.3389/fimmu.2022.1006954] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Accepted: 12/09/2022] [Indexed: 01/07/2023] Open
Abstract
Controlled Human Malaria Infection models (CHMI) have been critical to advancing new vaccines for malaria. Stringent and safe preparation of a challenge agent is key to the success of any CHMI. Difficulty producing the Plasmodium vivax parasite in vitro has limited production of qualified parasites for CHMI as well as the functional assays required to screen and down-select candidate vaccines for this globally distributed parasite. This and other challenges to P. vivax CHMI (PvCHMI), including scientific, logistical, and ethical obstacles, are common to P. vivax research conducted in both non-endemic and endemic countries, with additional hurdles unique to each. The challenges of using CHMI for P. vivax vaccine development and evaluation, lessons learned from previous and ongoing clinical trials, and the way forward to effectively perform PvCHMI to support vaccine development, are discussed.
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Affiliation(s)
- Wanlapa Roobsoong
- Mahidol Vivax Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Anjali Yadava
- Biologics Research & Development, Walter Reed Army Institute of Research, Silver Spring, MD, United States
| | - Simon J. Draper
- Department of Biochemistry, University of Oxford, Oxford, United Kingdom
| | | | - Jetsumon Sattabongkot
- Mahidol Vivax Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
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12
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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 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] [What about the content of this article? (0)] [Affiliation(s)] [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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13
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Samayoa-Reyes G, Flaherty SM, Wickham KS, Viera-Morilla S, Strauch PM, Roth A, Padrón L, Jackson CM, Meireles P, Calvo D, Roobsoong W, Kangwanrangsan N, Sattabongkot J, Reichard G, Lafuente-Monasterio MJ, Rochford R. Development of an ectopic huLiver model for Plasmodium liver stage infection. PLoS One 2023; 18:e0279144. [PMID: 36928885 PMCID: PMC10019673 DOI: 10.1371/journal.pone.0279144] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Accepted: 03/02/2023] [Indexed: 03/18/2023] Open
Abstract
Early Plasmodium falciparum and P. vivax infection requires parasite replication within host hepatocytes, referred to as liver stage (LS). However, limited understanding of infection dynamics in human LS exists due to species-specificity challenges. Reported here is a reproducible, easy-to-manipulate, and moderate-cost in vivo model to study human Plasmodium LS in mice; the ectopic huLiver model. Ectopic huLiver tumors were generated through subcutaneous injection of the HC-04 cell line and shown to be infectible by both freshly dissected sporozoites and through the bite of infected mosquitoes. Evidence for complete LS development was supported by the transition to blood-stage infection in mice engrafted with human erythrocytes. Additionally, this model was successfully evaluated for its utility in testing antimalarial therapeutics, as supported by primaquine acting as a causal prophylactic against P. falciparum. Presented here is a new platform for the study of human Plasmodium infection with the potential to aid in drug discovery.
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Affiliation(s)
- Gabriela Samayoa-Reyes
- Department of Immunology and Microbiology, University of Colorado School of Medicine, Aurora, Colorado, United States of America
| | - Siobhan M. Flaherty
- Department of Immunology and Microbiology, University of Colorado School of Medicine, Aurora, Colorado, United States of America
| | - Kristina S. Wickham
- Department of Drug Discovery, Experimental Therapeutics Branch, Walter Reed Army Institute of Research, Silver Spring, Maryland, United States of America
| | - Sara Viera-Morilla
- Diseases of the Developing World, Infectious Diseases-Centre for Excellence in Drug Discovery (ID CEDD), GlaxoSmithKline, Tres Cantos, Madrid, Spain
| | - Pamela M. Strauch
- Department of Immunology and Microbiology, University of Colorado School of Medicine, Aurora, Colorado, United States of America
| | - Alison Roth
- Department of Drug Discovery, Experimental Therapeutics Branch, Walter Reed Army Institute of Research, Silver Spring, Maryland, United States of America
| | - Laura Padrón
- Diseases of the Developing World, Infectious Diseases-Centre for Excellence in Drug Discovery (ID CEDD), GlaxoSmithKline, Tres Cantos, Madrid, Spain
| | - Conner M. Jackson
- Department of Immunology and Microbiology, University of Colorado School of Medicine, Aurora, Colorado, United States of America
| | - Patricia Meireles
- Diseases of the Developing World, Infectious Diseases-Centre for Excellence in Drug Discovery (ID CEDD), GlaxoSmithKline, Tres Cantos, Madrid, Spain
| | - David Calvo
- Diseases of the Developing World, Infectious Diseases-Centre for Excellence in Drug Discovery (ID CEDD), GlaxoSmithKline, Tres Cantos, Madrid, Spain
| | - Wanlapa Roobsoong
- Faculty of Tropical Medicine, Mahidol Vivax Research Unit, Mahidol University, Bangkok, Thailand
| | - Niwat Kangwanrangsan
- Faculty of Science, Pathobiology Department, Mahidol University, Bangkok, Thailand
| | - Jetsumon Sattabongkot
- Faculty of Tropical Medicine, Mahidol Vivax Research Unit, Mahidol University, Bangkok, Thailand
| | - Gregory Reichard
- Department of Drug Discovery, Experimental Therapeutics Branch, Walter Reed Army Institute of Research, Silver Spring, Maryland, United States of America
| | - Maria José Lafuente-Monasterio
- Diseases of the Developing World, Infectious Diseases-Centre for Excellence in Drug Discovery (ID CEDD), GlaxoSmithKline, Tres Cantos, Madrid, Spain
| | - Rosemary Rochford
- Department of Immunology and Microbiology, University of Colorado School of Medicine, Aurora, Colorado, United States of America
- * E-mail:
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14
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Cui L, Sattabongkot J, Aung PL, Brashear A, Cao Y, Kaewkungwal J, Khamsiriwatchara A, Kyaw MP, Lawpoolsri S, Menezes L, Miao J, Nguitragool W, Parker D, Phuanukoonnon S, Roobsoong W, Siddiqui F, Soe MT, Sriwichai P, Yang Z, Zhao Y, Zhong D. Multidisciplinary Investigations of Sustained Malaria Transmission in the Greater Mekong Subregion. Am J Trop Med Hyg 2022; 107:138-151. [PMID: 36228909 DOI: 10.4269/ajtmh.21-1267] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2021] [Accepted: 05/28/2022] [Indexed: 11/07/2022] Open
Abstract
In the course of malaria elimination in the Greater Mekong Subregion (GMS), malaria epidemiology has experienced drastic spatiotemporal changes with residual transmission concentrated along international borders and the rising predominance of Plasmodium vivax. The emergence of Plasmodium falciparum parasites resistant to artemisinin and partner drugs renders artemisinin-based combination therapies less effective while the potential spread of multidrug-resistant parasites elicits concern. Vector behavioral changes and insecticide resistance have reduced the effectiveness of core vector control measures. In recognition of these problems, the Southeast Asian International Center of Excellence for Malaria Research (ICEMR) has been conducting multidisciplinary research to determine how human migration, antimalarial drug resistance, vector behavior, and insecticide resistance sustain malaria transmission at international borders. These efforts allow us to comprehensively understand the ecology of border malaria transmission and develop population genomics tools to identify and track parasite introduction. In addition to employing in vivo, in vitro, and molecular approaches to monitor the emergence and spread of drug-resistant parasites, we also use genomic and genetic methods to reveal novel mechanisms of antimalarial drug resistance of parasites. We also use omics and population genetics approaches to study insecticide resistance in malaria vectors and identify changes in mosquito community structure, vectorial potential, and seasonal dynamics. Collectively, the scientific findings from the ICEMR research activities offer a systematic view of the factors sustaining residual malaria transmission and identify potential solutions to these problems to accelerate malaria elimination in the GMS.
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Affiliation(s)
- Liwang Cui
- Department of Internal Medicine, Morsani College of Medicine, University of South Florida, Tampa, Florida
| | | | | | - Awtum Brashear
- Department of Internal Medicine, Morsani College of Medicine, University of South Florida, Tampa, Florida
| | - Yaming Cao
- Department of Immunology, China Medical University, Shenyang, China
| | | | | | | | | | - Lynette Menezes
- Department of Internal Medicine, Morsani College of Medicine, University of South Florida, Tampa, Florida
| | - Jun Miao
- Department of Internal Medicine, Morsani College of Medicine, University of South Florida, Tampa, Florida
| | - Wang Nguitragool
- Mahidol Vivax Research Unit, Mahidol University, Bangkok, Thailand
| | - Daniel Parker
- Department of Epidemiology, University of California at Irvine, Irvine, California
| | | | | | - Faiza Siddiqui
- Department of Internal Medicine, Morsani College of Medicine, University of South Florida, Tampa, Florida
| | - Myat Thu Soe
- Myanmar Health Network Organization, Yangon, Myanmar
| | - Patchara Sriwichai
- Department of Medical Entomology, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Zhaoqing Yang
- Department of Pathogen Biology and Immunology, Kunming Medical University, Kunming, China
| | - Yan Zhao
- Department of Immunology, China Medical University, Shenyang, China
| | - Daibin Zhong
- Program in Public Health, University of California at Irvine, Irvine, California
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15
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Sattabongkot J, Cui L, Bantuchai S, Chotirat S, Kaewkungwal J, Khamsiriwatchara A, Kiattibutr K, Kyaw MP, Lawpoolsri S, Linn NYY, Menezes L, Miao J, Nguitragool W, Parker D, Prikchoo P, Roobsoong W, Sa-Angchai P, Samung Y, Sirichaisinthop J, Sriwichai P, Suk-Uam K, Thammapalo S, Wang B, Zhong D. Malaria Research for Tailored Control and Elimination Strategies in the Greater Mekong Subregion. Am J Trop Med Hyg 2022; 107:152-159. [PMID: 36228914 DOI: 10.4269/ajtmh.21-1268] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2021] [Accepted: 05/28/2022] [Indexed: 11/07/2022] Open
Abstract
The malaria landscape in the Greater Mekong Subregion has experienced drastic changes with the ramp-up of the control efforts, revealing formidable challenges that slowed down the progress toward malaria elimination. Problems such as border malaria and cross-border malaria introduction, multidrug resistance in Plasmodium falciparum, the persistence of Plasmodium vivax, the asymptomatic parasite reservoirs, and insecticide resistance in primary vectors require integrated strategies tailored for individual nations in the region. In recognition of these challenges and the need for research, the Southeast Asian International Center of Excellence for Malaria Research has established a network of researchers and stakeholders and conducted basic and translational research to identify existing and emerging problems and develop new countermeasures. The installation of a comprehensive disease and vector surveillance system at sentinel sites in border areas with the implementation of passive/active case detection and cross-sectional surveys allowed timely detection and management of malaria cases, provided updated knowledge for effective vector control measures, and facilitated the efficacy studies of antimalarials. Incorporating sensitive molecular diagnosis to expose the significance of asymptomatic parasite reservoirs for sustaining transmission helped establish the necessary evidence to guide targeted control to eliminate residual transmission. In addition, this program has developed point-of-care diagnostics to monitor the quality of artemisinin combination therapies, delivering the needed information to the drug regulatory authorities to take measures against falsified and substandard antimalarials. To accelerate malaria elimination, this program has actively engaged with stakeholders of all levels, fostered vertical and horizontal collaborations, and enabled the effective dissemination of research findings.
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Affiliation(s)
- Jetsumon Sattabongkot
- Mahidol Vivax Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Liwang Cui
- Department of Internal Medicine, Morsani College of Medicine, University of South Florida, Tampa, Florida
| | | | - Sadudee Chotirat
- Mahidol Vivax Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | | | | | - Kirakorn Kiattibutr
- Mahidol Vivax Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | | | | | - Nay Yi Yi Linn
- Department of Public Health, Ministry of Health, Nay Pyi Taw, Myanmar
| | - Lynette Menezes
- Department of Internal Medicine, Morsani College of Medicine, University of South Florida, Tampa, Florida
| | - Jun Miao
- Department of Internal Medicine, Morsani College of Medicine, University of South Florida, Tampa, Florida
| | - Wang Nguitragool
- Mahidol Vivax Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Daniel Parker
- Department of Epidemiology, University of California at Irvine, Irvine, California
| | - Pathomporn Prikchoo
- Office of Disease Prevention and Control 12, Ministry of Public Health, Songkla, Thailand
| | - Wanlapa Roobsoong
- Mahidol Vivax Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | | | - Yudthana Samung
- Department of Medical Entomology, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Jeeraphat Sirichaisinthop
- Vector-Borne Disease Control Center, Department of Disease Control, Ministry of Public Health, Bangkok, Thailand
| | - Patchara Sriwichai
- Department of Medical Entomology, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Kritsana Suk-Uam
- Vector Borne Disease Control Center 2.3, Ministry of Public Health, Tak, Thailand
| | - Suwich Thammapalo
- Vector-Borne Disease Control Center, Department of Disease Control, Ministry of Public Health, Bangkok, Thailand
| | - Baomin Wang
- College of Agriculture and Biotechnology, China Agricultural University, Beijing, China
| | - Daibin Zhong
- Program in Public Health, University of California at Irvine, Irvine, California
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16
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Gualdrón-López M, Díaz-Varela M, Zanghi G, Aparici-Herraiz I, Steel RW, Schäfer C, Cuscó P, Chuenchob V, Kangwangransan N, Billman ZP, Olsen TM, González JR, Roobsoong W, Sattabongkot J, Murphy SC, Mikolajczak SA, Borràs E, Sabidó E, Fernandez-Becerra C, Flannery EL, Kappe SH, del Portillo HA. Mass Spectrometry Identification of Biomarkers in Extracellular Vesicles From Plasmodium vivax Liver Hypnozoite Infections. Mol Cell Proteomics 2022; 21:100406. [PMID: 36030044 PMCID: PMC9520272 DOI: 10.1016/j.mcpro.2022.100406] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2021] [Revised: 08/12/2022] [Accepted: 08/20/2022] [Indexed: 01/18/2023] Open
Abstract
Latent liver stages termed hypnozoites cause relapsing Plasmodium vivax malaria infection and represent a major obstacle in the goal of malaria elimination. Hypnozoites are clinically undetectable, and presently, there are no biomarkers of this persistent parasite reservoir in the human liver. Here, we have identified parasite and human proteins associated with extracellular vesicles (EVs) secreted from in vivo infections exclusively containing hypnozoites. We used P. vivax-infected human liver-chimeric (huHEP) FRG KO mice treated with the schizonticidal experimental drug MMV048 as hypnozoite infection model. Immunofluorescence-based quantification of P. vivax liver forms showed that MMV048 removed schizonts from chimeric mice livers. Proteomic analysis of EVs derived from FRG huHEP mice showed that human EV cargo from infected FRG huHEP mice contain inflammation markers associated with active schizont replication and identified 66 P. vivax proteins. To identify hypnozoite-specific proteins associated with EVs, we mined the proteome data from MMV048-treated mice and performed an analysis involving intragroup and intergroup comparisons across all experimental conditions followed by a peptide compatibility analysis with predicted spectra to warrant robust identification. Only one protein fulfilled this stringent top-down selection, a putative filamin domain-containing protein. This study sets the stage to unveil biological features of human liver infections and identify biomarkers of hypnozoite infection associated with EVs.
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Affiliation(s)
- Melisa Gualdrón-López
- ISGlobal, Barcelona Institute for Global Health, Barcelona, Spain,IGTP, Institute for Health Sciences Trias I Pujol, Barcelona, Spain
| | - Miriam Díaz-Varela
- ISGlobal, Barcelona Institute for Global Health, Barcelona, Spain,IGTP, Institute for Health Sciences Trias I Pujol, Barcelona, Spain
| | - Gigliola Zanghi
- Center for Global Infectious Disease Research, Seattle Children’s Research Institute, Seattle, Washington, USA
| | - Iris Aparici-Herraiz
- ISGlobal, Barcelona Institute for Global Health, Barcelona, Spain,IGTP, Institute for Health Sciences Trias I Pujol, Barcelona, Spain
| | - Ryan W.J. Steel
- Center for Global Infectious Disease Research, Seattle Children’s Research Institute, Seattle, Washington, USA
| | - Carola Schäfer
- Center for Global Infectious Disease Research, Seattle Children’s Research Institute, Seattle, Washington, USA
| | - Pol Cuscó
- ISGlobal, Barcelona Institute for Global Health, Barcelona, Spain
| | - Vorada Chuenchob
- Center for Global Infectious Disease Research, Seattle Children’s Research Institute, Seattle, Washington, USA
| | - Niwat Kangwangransan
- Department of Pathobiology, Faculty of Science, Mahidol University, Bangkok, Thailand
| | - Zachary P. Billman
- Department of Laboratory Medicine and Pathology, and Department of Microbiology, University of Washington, Seattle, Washington, USA
| | - Tayla M. Olsen
- Department of Laboratory Medicine and Pathology, and Department of Microbiology, University of Washington, Seattle, Washington, USA
| | - Juan R. González
- ISGlobal, Barcelona Institute for Global Health, Barcelona, Spain
| | - Wanlapa Roobsoong
- MVRU, Mahidol Vivax Research Unit, Mahidol University, Bangkok, Thailand
| | | | - Sean C. Murphy
- Department of Laboratory Medicine and Pathology, and Department of Microbiology, University of Washington, Seattle, Washington, USA
| | - Sebastian A. Mikolajczak
- Center for Global Infectious Disease Research, Seattle Children’s Research Institute, Seattle, Washington, USA
| | - Eva Borràs
- Centre for Genomic Regulation (CRG), The Barcelona Institute of Science and Technology, Barcelona, Spain,Universitat Pompeu Fabra (UPF), Barcelona, Spain
| | - Eduard Sabidó
- Centre for Genomic Regulation (CRG), The Barcelona Institute of Science and Technology, Barcelona, Spain,Universitat Pompeu Fabra (UPF), Barcelona, Spain
| | - Carmen Fernandez-Becerra
- ISGlobal, Barcelona Institute for Global Health, Barcelona, Spain,IGTP, Institute for Health Sciences Trias I Pujol, Barcelona, Spain
| | - Erika L. Flannery
- Center for Global Infectious Disease Research, Seattle Children’s Research Institute, Seattle, Washington, USA
| | - Stefan H.I. Kappe
- Center for Global Infectious Disease Research, Seattle Children’s Research Institute, Seattle, Washington, USA,Department of Pediatrics, University of Washington, Seattle, Washington, USA
| | - Hernando A. del Portillo
- ISGlobal, Barcelona Institute for Global Health, Barcelona, Spain,IGTP, Institute for Health Sciences Trias I Pujol, Barcelona, Spain,ICREA, Catalan Institution for Research and Advanced Studies, Barcelona, Spain,For correspondence: Hernando A. del Portillo
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17
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Flannery EL, Kangwanrangsan N, Chuenchob V, Roobsoong W, Fishbaugher M, Zhou K, Billman ZP, Martinson T, Olsen TM, Schäfer C, Campo B, Murphy SC, Mikolajczak SA, Kappe SH, Sattabongkot J. Plasmodium vivax latent liver infection is characterized by persistent hypnozoites, hypnozoite-derived schizonts, and time-dependent efficacy of primaquine. Mol Ther Methods Clin Dev 2022; 26:427-440. [PMID: 36092359 PMCID: PMC9418049 DOI: 10.1016/j.omtm.2022.07.016] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2022] [Accepted: 07/31/2022] [Indexed: 01/13/2023]
Abstract
Plasmodium vivax is a malaria-causing pathogen that establishes a dormant form in the liver (the hypnozoite), which can activate weeks, months, or years after the primary infection to cause a relapse, characterized by secondary blood-stage infection. These asymptomatic and undetectable latent liver infections present a significant obstacle to the goal of global malaria eradication. We use a human liver-chimeric mouse model (FRG huHep) to study P. vivax hypnozoite latency and activation in an in vivo model system. Functional activation of hypnozoites and formation of secondary schizonts is demonstrated by first eliminating primary liver schizonts using a schizont-specific antimalarial tool compound, and then measuring recurrence of secondary liver schizonts in the tissue and an increase in parasite RNA within the liver. We also reveal that, while primaquine does not immediately eliminate hypnozoites from the liver, it arrests developing schizonts and prevents activation of hypnozoites, consistent with its clinical activity in humans. Our findings demonstrate that the FRG huHep model can be used to study the biology of P. vivax infection and latency and assess the activity of anti-relapse drugs.
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Affiliation(s)
- Erika L. Flannery
- Center for Global Infectious Disease Research, Seattle Children’s Research Institute, Seattle, WA 98109, USA
- Corresponding author Erika L. Flannery, Center for Global Infectious Disease Research, Seattle Children’s Research Institute, Seattle, WA 98109, USA.
| | - Niwat Kangwanrangsan
- Department of Pathobiology, Faculty of Science, Mahidol University, Bangkok, Thailand
| | - Vorada Chuenchob
- Center for Global Infectious Disease Research, Seattle Children’s Research Institute, Seattle, WA 98109, USA
| | - Wanlapa Roobsoong
- Mahidol Vivax Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Matthew Fishbaugher
- Center for Global Infectious Disease Research, Seattle Children’s Research Institute, Seattle, WA 98109, USA
| | - Kevin Zhou
- Department of Laboratory Medicine and Pathology, and Department of Microbiology, University of Washington, Seattle, WA 98115, USA
| | - Zachary P. Billman
- Department of Laboratory Medicine and Pathology, and Department of Microbiology, University of Washington, Seattle, WA 98115, USA
| | - Thomas Martinson
- Center for Global Infectious Disease Research, Seattle Children’s Research Institute, Seattle, WA 98109, USA
| | - Tayla M. Olsen
- Department of Laboratory Medicine and Pathology, and Department of Microbiology, University of Washington, Seattle, WA 98115, USA
| | - Carola Schäfer
- Center for Global Infectious Disease Research, Seattle Children’s Research Institute, Seattle, WA 98109, USA
| | - Brice Campo
- Medicines for Malaria Venture, Geneva, Switzerland
| | - Sean C. Murphy
- Department of Laboratory Medicine and Pathology, and Department of Microbiology, University of Washington, Seattle, WA 98115, USA
| | - Sebastian A. Mikolajczak
- Center for Global Infectious Disease Research, Seattle Children’s Research Institute, Seattle, WA 98109, USA
| | - Stefan H.I. Kappe
- Center for Global Infectious Disease Research, Seattle Children’s Research Institute, Seattle, WA 98109, USA
- Department of Pediatrics, University of Washington, Seattle, WA 98105, USA
- Corresponding author Stefan H.I. Kappe, Department of Pediatrics, University of Washington, Seattle, WA 98105, USA.
| | - Jetsumon Sattabongkot
- Mahidol Vivax Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
- Corresponding author Jetsumon Sattabongkot, Mahidol Vivax Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand.
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18
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Aparici Herraiz I, Caires HR, Castillo-Fernández Ó, Sima N, Méndez-Mora L, Risueño RM, Sattabongkot J, Roobsoong W, Hernández-Machado A, Fernandez-Becerra C, Barrias CC, del Portillo HA. Advancing Key Gaps in the Knowledge of Plasmodium vivax Cryptic Infections Using Humanized Mouse Models and Organs-on-Chips. Front Cell Infect Microbiol 2022; 12:920204. [PMID: 35873153 PMCID: PMC9302440 DOI: 10.3389/fcimb.2022.920204] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2022] [Accepted: 06/06/2022] [Indexed: 11/13/2022] Open
Abstract
Plasmodium vivax is the most widely distributed human malaria parasite representing 36.3% of disease burden in the South-East Asia region and the most predominant species in the region of the Americas. Recent estimates indicate that 3.3 billion of people are under risk of infection with circa 7 million clinical cases reported each year. This burden is certainly underestimated as the vast majority of chronic infections are asymptomatic. For centuries, it has been widely accepted that the only source of cryptic parasites is the liver dormant stages known as hypnozoites. However, recent evidence indicates that niches outside the liver, in particular in the spleen and the bone marrow, can represent a major source of cryptic chronic erythrocytic infections. The origin of such chronic infections is highly controversial as many key knowledge gaps remain unanswered. Yet, as parasites in these niches seem to be sheltered from immune response and antimalarial drugs, research on this area should be reinforced if elimination of malaria is to be achieved. Due to ethical and technical considerations, working with the liver, bone marrow and spleen from natural infections is very difficult. Recent advances in the development of humanized mouse models and organs-on-a-chip models, offer novel technological frontiers to study human diseases, vaccine validation and drug discovery. Here, we review current data of these frontier technologies in malaria, highlighting major challenges ahead to study P. vivax cryptic niches, which perpetuate transmission and burden.
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Affiliation(s)
- Iris Aparici Herraiz
- Barcelona Institute for Global Health (ISGlobal), Hospital Clínic - Universitat de Barcelona, Barcelona, Spain
- Institut d’Investigació en Ciències de la Salut Germans Trias i Pujol, Badalona, Spain
| | - Hugo R. Caires
- i3S - Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal
| | - Óscar Castillo-Fernández
- Barcelona Institute for Global Health (ISGlobal), Hospital Clínic - Universitat de Barcelona, Barcelona, Spain
- Institut d’Investigació en Ciències de la Salut Germans Trias i Pujol, Badalona, Spain
- Institute of Nanoscience and Nanotechnology (IN2UB), University of Barcelona, Barcelona, Spain
| | - Núria Sima
- Barcelona Institute for Global Health (ISGlobal), Hospital Clínic - Universitat de Barcelona, Barcelona, Spain
- Institut d’Investigació en Ciències de la Salut Germans Trias i Pujol, Badalona, Spain
| | - Lourdes Méndez-Mora
- Department of Condensed Matter Physics, University of Barcelona (UB), Barcelona, Spain
| | - Ruth M. Risueño
- Josep Carreras Leukaemia Research Institute (IJC), Barcelona, Spain
| | - Jetsumon Sattabongkot
- Mahidol Vivax Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Wanlapa Roobsoong
- Mahidol Vivax Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Aurora Hernández-Machado
- Institute of Nanoscience and Nanotechnology (IN2UB), University of Barcelona, Barcelona, Spain
- Department of Condensed Matter Physics, University of Barcelona (UB), Barcelona, Spain
- Centre de Recerca Matemàtica (CRM), Barcelona, Spain
| | - Carmen Fernandez-Becerra
- Barcelona Institute for Global Health (ISGlobal), Hospital Clínic - Universitat de Barcelona, Barcelona, Spain
- Institut d’Investigació en Ciències de la Salut Germans Trias i Pujol, Badalona, Spain
| | - Cristina C. Barrias
- i3S - Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal
- INEB – Instituto de Engenharia Biomédica, Universidade do Porto, Porto, Portugal
- ICBAS – Instituto de Ciências Biomédicas de Abel Salazar, Universidade do Porto, Porto, Portugal
| | - Hernando A. del Portillo
- Barcelona Institute for Global Health (ISGlobal), Hospital Clínic - Universitat de Barcelona, Barcelona, Spain
- Institut d’Investigació en Ciències de la Salut Germans Trias i Pujol, Badalona, Spain
- Institució Catalana de Recerca i Estudis Avançats (ICREA), Barcelona, Spain
- *Correspondence: Hernando A. del Portillo,
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19
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Mancio-Silva L, Gural N, Real E, Wadsworth MH, Butty VL, March S, Nerurkar N, Hughes TK, Roobsoong W, Fleming HE, Whittaker CA, Levine SS, Sattabongkot J, Shalek AK, Bhatia SN. A single-cell liver atlas of Plasmodium vivax infection. Cell Host Microbe 2022; 30:1048-1060.e5. [PMID: 35443155 DOI: 10.1016/j.chom.2022.03.034] [Citation(s) in RCA: 24] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Revised: 01/31/2022] [Accepted: 03/25/2022] [Indexed: 12/15/2022]
Abstract
Malaria-causing Plasmodium vivax parasites can linger in the human liver for weeks to years and reactivate to cause recurrent blood-stage infection. Although they are an important target for malaria eradication, little is known about the molecular features of replicative and non-replicative intracellular liver-stage parasites and their host cell dependence. Here, we leverage a bioengineered human microliver platform to culture patient-derived P. vivax parasites for transcriptional profiling. Coupling enrichment strategies with bulk and single-cell analyses, we capture both parasite and host transcripts in individual hepatocytes throughout the course of infection. We define host- and state-dependent transcriptional signatures and identify unappreciated populations of replicative and non-replicative parasites that share features with sexual transmissive forms. We find that infection suppresses the transcription of key hepatocyte function genes and elicits an anti-parasite innate immune response. Our work provides a foundation for understanding host-parasite interactions and reveals insights into the biology of P. vivax dormancy and transmission.
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Affiliation(s)
- Liliana Mancio-Silva
- Institute for Medical Engineering and Science, Massachusetts Institute of Technology (MIT), Cambridge, MA 02139, USA; David H. Koch Institute for Integrative Cancer Research, MIT, Cambridge, MA 02139, USA; Institut Pasteur, Université Paris Cité, Inserm U1201, CNRS EMR9195, Unité de Biologie des Interactions Hôte-Parasite, 75015 Paris, France.
| | - Nil Gural
- Institute for Medical Engineering and Science, Massachusetts Institute of Technology (MIT), Cambridge, MA 02139, USA; David H. Koch Institute for Integrative Cancer Research, MIT, Cambridge, MA 02139, USA
| | - Eliana Real
- Institut Pasteur, Université Paris Cité, Inserm U1201, CNRS EMR9195, Unité de Biologie des Interactions Hôte-Parasite, 75015 Paris, France
| | - Marc H Wadsworth
- Institute for Medical Engineering and Science, Massachusetts Institute of Technology (MIT), Cambridge, MA 02139, USA; Department of Chemistry, MIT, Cambridge, MA 02139, USA
| | - Vincent L Butty
- David H. Koch Institute for Integrative Cancer Research, MIT, Cambridge, MA 02139, USA; BioMicro Center, MIT, Cambridge, MA 02139, USA
| | - Sandra March
- Institute for Medical Engineering and Science, Massachusetts Institute of Technology (MIT), Cambridge, MA 02139, USA; David H. Koch Institute for Integrative Cancer Research, MIT, Cambridge, MA 02139, USA; Broad Institute of MIT and Harvard, Cambridge, MA 02139, USA; Howard Hughes Medical Institute, Chevy Chase, MD 20815, USA
| | - Niketa Nerurkar
- Institute for Medical Engineering and Science, Massachusetts Institute of Technology (MIT), Cambridge, MA 02139, USA; David H. Koch Institute for Integrative Cancer Research, MIT, Cambridge, MA 02139, USA
| | - Travis K Hughes
- Institute for Medical Engineering and Science, Massachusetts Institute of Technology (MIT), Cambridge, MA 02139, USA; Department of Chemistry, MIT, Cambridge, MA 02139, USA
| | - Wanlapa Roobsoong
- Mahidol Vivax Research Unit, Faculty of Tropical Medicine Mahidol University, Bangkok 10400, Thailand
| | - Heather E Fleming
- Institute for Medical Engineering and Science, Massachusetts Institute of Technology (MIT), Cambridge, MA 02139, USA; David H. Koch Institute for Integrative Cancer Research, MIT, Cambridge, MA 02139, USA
| | - Charlie A Whittaker
- David H. Koch Institute for Integrative Cancer Research, MIT, Cambridge, MA 02139, USA; BioMicro Center, MIT, Cambridge, MA 02139, USA
| | - Stuart S Levine
- David H. Koch Institute for Integrative Cancer Research, MIT, Cambridge, MA 02139, USA; BioMicro Center, MIT, Cambridge, MA 02139, USA
| | - Jetsumon Sattabongkot
- Mahidol Vivax Research Unit, Faculty of Tropical Medicine Mahidol University, Bangkok 10400, Thailand
| | - Alex K Shalek
- Institute for Medical Engineering and Science, Massachusetts Institute of Technology (MIT), Cambridge, MA 02139, USA; David H. Koch Institute for Integrative Cancer Research, MIT, Cambridge, MA 02139, USA; Department of Chemistry, MIT, Cambridge, MA 02139, USA; Ragon Institute of Massachusetts General Hospital, MIT, and Harvard, Cambridge, MA 02139, USA; Broad Institute of MIT and Harvard, Cambridge, MA 02139, USA.
| | - Sangeeta N Bhatia
- Institute for Medical Engineering and Science, Massachusetts Institute of Technology (MIT), Cambridge, MA 02139, USA; David H. Koch Institute for Integrative Cancer Research, MIT, Cambridge, MA 02139, USA; Broad Institute of MIT and Harvard, Cambridge, MA 02139, USA; Howard Hughes Medical Institute, Chevy Chase, MD 20815, USA; The Wyss Institute for Biologically Inspired Engineering Harvard University Boston, MA 02215, USA.
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20
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Chandna A, Chew R, Shwe Nwe Htun N, Peto TJ, Zhang M, Liverani M, Brummaier T, Phommasone K, Perrone C, Pyae Phyo A, Sattabongkot J, Roobsoong W, Nguitragool W, Sen A, Ibna Zaman S, Sandar Zaw A, Batty E, Waithira N, Abdad MY, Blacksell SD, Bodhidatta L, Callery JJ, Fagnark W, Huangsuranun W, Islam S, Lertcharoenchoke S, Lohavittayavikant S, Mukaka M, Moul V, Kumer Neogi A, Nedsuwan S, Pongvongsa T, Ponsap P, Richard-Greenblatt M, Schilling WH, Thaipadungpanit J, Tripura R, Dondorp AM, Mayxay M, White NJ, Nosten F, Smithuis F, Ashley EA, Maude RJ, Day NP, Lubell Y. Defining the burden of febrile illness in rural South and Southeast Asia: an open letter to announce the launch of the Rural Febrile Illness project. Wellcome Open Res 2022; 6:64. [PMID: 34017924 PMCID: PMC8080974 DOI: 10.12688/wellcomeopenres.16393.2] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/14/2021] [Indexed: 01/25/2023] Open
Abstract
In rural areas of South and Southeast Asia malaria is declining but febrile illnesses still account for substantial morbidity and mortality. Village health workers (VHWs) are often the first point of contact with the formal health system, and for patients with febrile illnesses they can provide early diagnosis and treatment of malaria. However, for the majority of febrile patients, VHWs lack the training, support and resources to provide further care. Consequently, treatable bacterial illnesses are missed, antibiotics are overused and poorly targeted, and patient attendance wanes along with declining malaria. This
Open Letter announces the start of a new initiative, the Rural Febrile Illness (RFI) project, the first in a series of projects to be implemented as part of the South and Southeast Asian Community-based Trials Network (SEACTN) research programme. This multi-country, multi-site project will run in Bangladesh, Cambodia, Lao PDR, Thailand, and Myanmar. It will define the epidemiological baseline of febrile illness in nine remote and underserved areas of Asia where malaria endemicity is declining and access to health services is limited. The RFI project aims to determine the incidence, causes and outcomes of febrile illness; understand the opportunities, barriers and appetite for adjustment of the role of VHWs to include management of non-malarial febrile illnesses; and establish a network of community healthcare providers and facilities capable of implementing interventions designed to triage, diagnose and treat patients presenting with febrile illnesses within these communities in the future.
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Affiliation(s)
- Arjun Chandna
- Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, University of Oxford, Oxford, UK
- Cambodia Oxford Medical Research Unit, Angkor Hospital for Children, Siem Reap, Cambodia
| | - Rusheng Chew
- Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, University of Oxford, Oxford, UK
- Mahidol-Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
- Faculty of Medicine, University of Queensland, Brisbane, Australia
| | - Nan Shwe Nwe Htun
- Mahidol-Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Thomas J. Peto
- Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, University of Oxford, Oxford, UK
- Mahidol-Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Meiwen Zhang
- Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, University of Oxford, Oxford, UK
- Mahidol-Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Marco Liverani
- Department of Global Health and Development, London School of Hygiene & Tropical Medicine, London, UK
- Faculty of Public Health, Mahidol University, Bangkok, Thailand
- School of Tropical Medicine and Global Health, Nagasaki University, Nagasaki, Japan
| | - Tobias Brummaier
- Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, University of Oxford, Oxford, UK
- Shoklo Malaria Research Unit, Mahidol-Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Mae Sot, Thailand
- Swiss Tropical and Public Health Institute, Basel, Switzerland
- University of Basel, Basel, Switzerland
| | - Koukeo Phommasone
- Lao-Oxford-Mahosot Hospital Wellcome Trust Research Unit, Microbiology Laboratory, Mahosot Hospital, Vientiane, Lao People's Democratic Republic
| | - Carlo Perrone
- Mahidol-Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Aung Pyae Phyo
- Shoklo Malaria Research Unit, Mahidol-Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Mae Sot, Thailand
| | - Jetsumon Sattabongkot
- Mahidol Vivax Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
- Mahidol University, Bangkok, Thailand
| | - Wanlapa Roobsoong
- Mahidol Vivax Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
- Mahidol University, Bangkok, Thailand
| | - Wang Nguitragool
- Department of Molecular Tropical Medicine and Genetics, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Aninda Sen
- Communicable Diseases Programme, BRAC, Dhaka, Bangladesh
| | - Sazid Ibna Zaman
- Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, University of Oxford, Oxford, UK
- Mahidol-Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | | | - Elizabeth Batty
- Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, University of Oxford, Oxford, UK
- Mahidol-Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Naomi Waithira
- Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, University of Oxford, Oxford, UK
- Mahidol-Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Mohammad Yazid Abdad
- Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, University of Oxford, Oxford, UK
- Mahidol-Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Stuart D. Blacksell
- Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, University of Oxford, Oxford, UK
- Mahidol-Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Ladaporn Bodhidatta
- Mahidol-Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - James J. Callery
- Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, University of Oxford, Oxford, UK
- Mahidol-Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Watcharintorn Fagnark
- Mahidol-Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Witchayoot Huangsuranun
- Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, University of Oxford, Oxford, UK
- Mahidol-Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Shayla Islam
- Communicable Diseases Programme, BRAC, Dhaka, Bangladesh
| | - Sanchai Lertcharoenchoke
- Mahidol-Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Salisa Lohavittayavikant
- Mahidol-Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | | | - Vanna Moul
- Communicable Diseases Programme, BRAC, Dhaka, Bangladesh
| | | | | | - Tiengkham Pongvongsa
- Savannakhet Provincial Health Department, Savannakhet, Lao People's Democratic Republic
| | - Pimsiri Ponsap
- Mahidol-Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | | | - William H.K. Schilling
- Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, University of Oxford, Oxford, UK
- Mahidol-Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Janjira Thaipadungpanit
- Mahidol-Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
- Department of Clinical Tropical Medicine, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Rupam Tripura
- Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, University of Oxford, Oxford, UK
- Mahidol-Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Arjen M. Dondorp
- Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, University of Oxford, Oxford, UK
- Mahidol-Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Mayfong Mayxay
- Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, University of Oxford, Oxford, UK
- Lao-Oxford-Mahosot Hospital Wellcome Trust Research Unit, Microbiology Laboratory, Mahosot Hospital, Vientiane, Lao People's Democratic Republic
- Institute of Research and Education Development, University of Health Sciences, Vientiane, Lao People's Democratic Republic
| | - Nicholas J. White
- Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, University of Oxford, Oxford, UK
- Mahidol-Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - François Nosten
- Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, University of Oxford, Oxford, UK
- Shoklo Malaria Research Unit, Mahidol-Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Mae Sot, Thailand
| | - Frank Smithuis
- Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, University of Oxford, Oxford, UK
- Myanmar Oxford Clinical Research Unit, Yangon, Myanmar
| | - Elizabeth A. Ashley
- Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, University of Oxford, Oxford, UK
- Lao-Oxford-Mahosot Hospital Wellcome Trust Research Unit, Microbiology Laboratory, Mahosot Hospital, Vientiane, Lao People's Democratic Republic
| | - Richard J. Maude
- Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, University of Oxford, Oxford, UK
- Mahidol-Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
- Harvard TH Chan School of Public Health, Harvard University, Boston, USA
- The Open University, Milton Keynes, UK
| | - Nicholas P.J. Day
- Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, University of Oxford, Oxford, UK
- Mahidol-Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Yoel Lubell
- Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, University of Oxford, Oxford, UK
- Mahidol-Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
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21
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Thongbamrer C, Roobsoong W, Sattabongkot J, Opanasopit P, Yingyongnarongkul BE. Serum Compatible Spermine-based Cationic Lipids with Non-identical Hydrocarbon Tails Mediate High Transfection Efficiency. Chembiochem 2022; 23:e202100672. [PMID: 35001486 DOI: 10.1002/cbic.202100672] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2021] [Revised: 01/08/2022] [Indexed: 11/09/2022]
Abstract
Cationic lipids are widely used as non-viral synthetic vectors for gene delivery as a safer alternative to viral vectors. In this work, a library of L-shaped spermine-based cationic lipids with identical and non-identical hydrophobic chains having variable carbon length (from C10 to C18) was designed and synthesized. These lipids were characterized and the structure-activity relationships of these compounds were determined for DNA binding and transfection ability when formulated as cationic liposomes. The liposomes were then used successfully for the transfection of HEK293T, HeLa, PC3, H460, HepG2, SH-SY5Y and Calu'3 cell lines. The transfection efficiency of lipids with non-identical hydrocarbon chains was greater than the identical analog. These reagents exhibited superior efficiency to the commercial reagent, Lipofectamine3000, under both serum-free and 10-40% serum conditions in HEK293T, HeLa and H460 cell lines. The lipids were also not toxic to the tested cells. The results suggested that L-shaped spermine-based cationic lipids with non-identical hydrocarbon tails could serve as an efficient and safe non-viral vector gene carrier for further in vivo studies.
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Affiliation(s)
- Chopaka Thongbamrer
- Ramkhamhaeng University, Department of Chemistry and Center of Excellence for Innovation in Chemistry (PERCH-CIC), THAILAND
| | | | | | - Praneet Opanasopit
- Silpakorn University, Pharmaceutical Development of Green Innovations Group (PDGIG), THAILAND
| | - Boon-Ek Yingyongnarongkul
- Ramkhamhaeng University, Department of Chemistry and Center of Excellene for Innovation in Chemistry (PERCH-CIC), Ramkhamhaeng Road, Huamark Bangkapi, 10240, Bangkok, THAILAND
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22
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Minassian AM, Themistocleous Y, Silk SE, Barrett JR, Kemp A, Quinkert D, Nielsen CM, Edwards NJ, Rawlinson TA, Ramos Lopez F, Roobsoong W, Ellis KJ, Cho JS, Aunin E, Otto TD, Reid AJ, Bach FA, Labbé GM, Poulton ID, Marini A, Zaric M, Mulatier M, Lopez Ramon R, Baker M, Mitton CH, Sousa JC, Rachaphaew N, Kumpitak C, Maneechai N, Suansomjit C, Piteekan T, Hou MM, Khozoee B, McHugh K, Roberts DJ, Lawrie AM, Blagborough AM, Nugent FL, Taylor IJ, Johnson KJ, Spence PJ, Sattabongkot J, Biswas S, Rayner JC, Draper SJ. Controlled human malaria infection with a clone of Plasmodium vivax with high quality genome assembly. JCI Insight 2021; 6:152465. [PMID: 34609964 PMCID: PMC8675201 DOI: 10.1172/jci.insight.152465] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Controlled human malaria infection (CHMI) provides a highly informative means to investigate host-pathogen interactions and enable in vivo proof-of-concept efficacy testing of new drugs and vaccines. However, unlike Plasmodium falciparum, well-characterized P. vivax parasites that are safe and suitable for use in modern CHMI models are limited. Here, two healthy malaria-naïve UK adults with universal donor blood group were safely infected with a clone of P. vivax from Thailand by mosquito-bite CHMI. Parasitemia developed in both volunteers and, prior to treatment, each volunteer donated blood to produce a cryopreserved stabilate of infected red blood cells. Following stringent safety screening, the parasite stabilate from one of these donors ("PvW1") was thawed and used to inoculate six healthy malaria-naïve UK adults by blood-stage CHMI, at three different dilutions. Parasitemia developed in all volunteers, who were then successfully drug treated. PvW1 parasite DNA was isolated and sequenced to produce a high quality genome assembly by using a hybrid assembly method. We analysed leading vaccine candidate antigens and multigene families, including the Vivax interspersed repeat (VIR) genes of which we identified 1145 in the PvW1 genome. Our genomic analysis will guide future assessment of candidate vaccines and drugs, as well as experimental medicine studies.
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Affiliation(s)
| | | | - Sarah E Silk
- The Jenner Institute, University of Oxford, Oxford, United Kingdom
| | - Jordan R Barrett
- The Jenner Institute, University of Oxford, Oxford, United Kingdom
| | - Alison Kemp
- Cambridge Institute for Medical Research, University of Cambridge, Cambridge, United Kingdom
| | - Doris Quinkert
- The Jenner Institute, University of Oxford, Oxford, United Kingdom
| | | | - Nick J Edwards
- The Jenner Institute, University of Oxford, Oxford, United Kingdom
| | | | | | | | | | - Jee-Sun Cho
- The Jenner Institute, University of Oxford, Oxford, United Kingdom
| | - Eerik Aunin
- Wellcome Sanger Institute, Wellcome Genome Campus, Cambridge, United Kingdom
| | - Thomas D Otto
- Wellcome Sanger Institute, Wellcome Genome Campus, Cambridge, United Kingdom
| | - Adam J Reid
- Wellcome Sanger Institute, Wellcome Genome Campus, Cambridge, United Kingdom
| | - Florian A Bach
- Institute of Immunology and Infection Research, University of Edinburgh, Edinburgh, United Kingdom
| | | | - Ian D Poulton
- The Jenner Institute, University of Oxford, Oxford, United Kingdom
| | - Arianna Marini
- The Jenner Institute, University of Oxford, Oxford, United Kingdom
| | - Marija Zaric
- The Jenner Institute, University of Oxford, Oxford, United Kingdom
| | - Margaux Mulatier
- The Jenner Institute, University of Oxford, Oxford, United Kingdom
| | | | - Megan Baker
- The Jenner Institute, University of Oxford, Oxford, United Kingdom
| | - Celia H Mitton
- The Jenner Institute, University of Oxford, Oxford, United Kingdom
| | - Jason C Sousa
- Experimental Therapeutics Branch, Walter Reed Army Institute of Research, Maryland, United States of America
| | | | | | | | | | - Tianrat Piteekan
- Mahidol Vivax Research Unit, Mahidol University, Bangkok, Thailand
| | - Mimi M Hou
- The Jenner Institute, University of Oxford, Oxford, United Kingdom
| | - Baktash Khozoee
- The Jenner Institute, University of Oxford, Oxford, United Kingdom
| | - Kirsty McHugh
- The Jenner Institute, University of Oxford, Oxford, United Kingdom
| | - David J Roberts
- Nuffield Division of Clinical Laboratory Sciences, University of Oxford, Oxford, United Kingdom
| | - Alison M Lawrie
- The Jenner Institute, University of Oxford, Oxford, United Kingdom
| | | | - Fay L Nugent
- The Jenner Institute, University of Oxford, Oxford, United Kingdom
| | - Iona J Taylor
- The Jenner Institute, University of Oxford, Oxford, United Kingdom
| | | | - Philip J Spence
- Institute of Immunology and Infection Research, University of Edinburgh, Edinburgh, United Kingdom
| | | | - Sumi Biswas
- The Jenner Institute, University of Oxford, Oxford, United Kingdom
| | - Julian C Rayner
- Cambridge Institute for Medical Research, University of Cambridge, Cambridge, United Kingdom
| | - Simon J Draper
- The Jenner Institute, University of Oxford, Oxford, United Kingdom
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23
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Zhang Y, Liu F, Zhao Y, Yang F, Bai J, Jia X, Roobsoong W, Sattabongkot J, Cui L, Cao Y, Luo E, Wang M. Evaluation of two Plasmodium vivax sexual stage antigens as transmission-blocking vaccine candidates. Parasit Vectors 2021; 14:407. [PMID: 34399829 PMCID: PMC8366161 DOI: 10.1186/s13071-021-04909-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2021] [Accepted: 07/30/2021] [Indexed: 11/10/2022] Open
Abstract
Background Plasmodium vivax transmission-blocking vaccines (TBVs) are receiving increasing attention. Based on excellent transmission-blocking activities of the PbPH (PBANKA_0417200) and PbSOP26 (PBANKA_1457700) antigens in Plasmodium berghei, their orthologs in P. vivax, PVX_098655 (PvPH) and PVX_101120 (PvSOP26), were selected for the evaluation of their potential as TBVs. Methods Fragments of PvPH (amino acids 22–304) and PvSOP26 (amino acids 30–272) were expressed in the yeast expression system. The recombinant proteins were used to immunize mice to obtain antisera. The transmission-reducing activities of these antisera were evaluated using the direct membrane feeding assay (DMFA) using Anopheles dirus mosquitoes and P. vivax clinical isolates. Results The recombinant proteins PvPH and PvSOP26 induced robust antibody responses in mice. The DMFA showed that the anti-PvSOP26 sera significantly reduced oocyst densities by 92.0 and 84.1% in two parasite isolates, respectively, whereas the anti-PvPH sera did not show evident transmission-reducing activity. The variation in the DMFA results was unlikely due to the genetic polymorphisms of the two genes since their respective sequences were identical in the clinical P. vivax isolates. Conclusion PvSOP26 could be a promising TBV candidate for P. vivax, which warrants further evaluation. Graphical Abstract ![]()
Supplementary Information The online version contains supplementary material available at 10.1186/s13071-021-04909-w.
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Affiliation(s)
- Yongzhe Zhang
- Department of Pathogen Biology, College of Basic Medical Sciences, China Medical University, Shenyang, 110122, Liaoning, China.,Department of Nephrology, Shengjing Hospital of China Medical University, Shenyang, 110004, Liaoning, China
| | - Fei Liu
- Department of Immunology, College of Basic Medical Sciences, China Medical University, Shenyang, 110122, Liaoning, China
| | - Yan Zhao
- Department of Immunology, College of Basic Medical Sciences, China Medical University, Shenyang, 110122, Liaoning, China
| | - Fan Yang
- Department of Immunology, College of Basic Medical Sciences, China Medical University, Shenyang, 110122, Liaoning, China
| | - Jie Bai
- Department of Immunology, College of Basic Medical Sciences, China Medical University, Shenyang, 110122, Liaoning, China
| | - Xitong Jia
- Department of Pathogen Biology, College of Basic Medical Sciences, China Medical University, Shenyang, 110122, Liaoning, China
| | - Wanlapa Roobsoong
- Mahidol Vivax Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Jetsumon Sattabongkot
- Mahidol Vivax Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Liwang Cui
- Department of Internal Medicine, Morsani College of Medicine, University of South Florida, 3720 Spectrum Boulevard, Suite 304, Tampa, FL, 33612-9415, USA
| | - Yaming Cao
- Department of Immunology, College of Basic Medical Sciences, China Medical University, Shenyang, 110122, Liaoning, China
| | - Enjie Luo
- Department of Pathogen Biology, College of Basic Medical Sciences, China Medical University, Shenyang, 110122, Liaoning, China.
| | - Meilian Wang
- Department of Pathogen Biology, College of Basic Medical Sciences, China Medical University, Shenyang, 110122, Liaoning, China.
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24
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Schäfer C, Dambrauskas N, Reynolds LM, Trakhimets O, Raappana A, Flannery EL, Roobsoong W, Sattabongkot J, Mikolajczak SA, Kappe SHI, Sather DN. Partial protection against P. vivax infection diminishes hypnozoite burden and blood-stage relapses. Cell Host Microbe 2021; 29:752-756.e4. [PMID: 33857426 DOI: 10.1016/j.chom.2021.03.011] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2020] [Revised: 02/16/2021] [Accepted: 03/18/2021] [Indexed: 01/23/2023]
Abstract
Latent forms of Plasmodium vivax, called hypnozoites, cause malaria relapses from the liver into the bloodstream and are a major obstacle to malaria eradication. To experimentally assess the impact of a partially protective pre-erythrocytic vaccine on reducing Plasmodium vivax relapses, we developed a liver-humanized mouse model that allows monitoring of relapses directly in the blood. We passively infused these mice with a suboptimal dose of an antibody that targets the circumsporozoite protein prior to challenge with P. vivax sporozoites. Although this regimen did not completely prevent primary infection, antibody-treated mice experienced 62% fewer relapses. The data constitute unprecedented direct experimental evidence that suboptimal efficacy of infection-blocking antibodies, while not completely preventing primary infection, has a pronounced benefit in reducing the number of relapses. These findings suggest that a partially efficacious pre-erythrocytic Plasmodium vivax vaccine can have a disproportionately high impact in positive public health outcomes.
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Affiliation(s)
- Carola Schäfer
- Center for Global Infectious Disease Research, Seattle Children's Research Institute, Seattle, WA 98109, USA
| | - Nicholas Dambrauskas
- Center for Global Infectious Disease Research, Seattle Children's Research Institute, Seattle, WA 98109, USA
| | - Laura M Reynolds
- Center for Global Infectious Disease Research, Seattle Children's Research Institute, Seattle, WA 98109, USA
| | - Olesya Trakhimets
- Center for Global Infectious Disease Research, Seattle Children's Research Institute, Seattle, WA 98109, USA
| | - Andrew Raappana
- Center for Global Infectious Disease Research, Seattle Children's Research Institute, Seattle, WA 98109, USA
| | - Erika L Flannery
- Center for Global Infectious Disease Research, Seattle Children's Research Institute, Seattle, WA 98109, USA
| | - 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
| | - Sebastian A Mikolajczak
- Center for Global Infectious Disease Research, Seattle Children's Research Institute, Seattle, WA 98109, USA
| | - Stefan H I Kappe
- Center for Global Infectious Disease Research, Seattle Children's Research Institute, Seattle, WA 98109, USA; Department of Pediatrics, University of Washington, Seattle, WA 98105, USA; Department of Global Health, University of Washington, Seattle, WA 98105, USA.
| | - D Noah Sather
- Center for Global Infectious Disease Research, Seattle Children's Research Institute, Seattle, WA 98109, USA; Department of Pediatrics, University of Washington, Seattle, WA 98105, USA; Department of Global Health, University of Washington, Seattle, WA 98105, USA.
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25
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Schäfer C, Roobsoong W, Kangwanrangsan N, Bardelli M, Rawlinson TA, Dambrauskas N, Trakhimets O, Parthiban C, Goswami D, Reynolds LM, Kennedy SY, Flannery EL, Murphy SC, Sather DN, Draper SJ, Sattabongkot J, Mikolajczak SA, Kappe SHI. A Humanized Mouse Model for Plasmodium vivax to Test Interventions that Block Liver Stage to Blood Stage Transition and Blood Stage Infection. iScience 2020; 23:101381. [PMID: 32739836 PMCID: PMC7399188 DOI: 10.1016/j.isci.2020.101381] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2020] [Revised: 04/02/2020] [Accepted: 07/15/2020] [Indexed: 12/20/2022] Open
Abstract
The human malaria parasite Plasmodium vivax remains vastly understudied, mainly due to the lack of suitable laboratory models. Here, we report a humanized mouse model to test interventions that block P. vivax parasite transition from liver stage infection to blood stage infection. Human liver-chimeric FRGN huHep mice infected with P. vivax sporozoites were infused with human reticulocytes, allowing transition of exo-erythrocytic merozoites to reticulocyte infection and development into all erythrocytic forms, including gametocytes, in vivo. In order to test the utility of this model for preclinical assessment of interventions, the invasion blocking potential of a monoclonal antibody targeting the essential interaction of the P. vivax Duffy Binding Protein with the Duffy antigen receptor was tested by passive immunization. This antibody inhibited invasion by over 95%, providing unprecedented in vivo evidence that PvDBP constitutes a promising blood stage vaccine candidate and proving our model highly suitable to test blood stage interventions.
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Affiliation(s)
- Carola Schäfer
- Center for Global Infectious Disease Research, Seattle Children's Research Institute, Seattle, WA 98109, USA
| | - Wanlapa Roobsoong
- Mahidol Vivax Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok 10400, Thailand
| | - Niwat Kangwanrangsan
- Department of Pathobiology, Faculty of Science, Mahidol University, Bangkok 10400, Thailand
| | | | | | - Nicholas Dambrauskas
- Center for Global Infectious Disease Research, Seattle Children's Research Institute, Seattle, WA 98109, USA
| | - Olesya Trakhimets
- Center for Global Infectious Disease Research, Seattle Children's Research Institute, Seattle, WA 98109, USA
| | - Chaitra Parthiban
- Departments of Laboratory Medicine and Microbiology and Center for Emerging and Re-emerging Infectious Diseases, University of Washington, Seattle, WA 98109, USA
| | - Debashree Goswami
- Center for Global Infectious Disease Research, Seattle Children's Research Institute, Seattle, WA 98109, USA
| | - Laura M Reynolds
- Center for Global Infectious Disease Research, Seattle Children's Research Institute, Seattle, WA 98109, USA
| | - Spencer Y Kennedy
- Center for Global Infectious Disease Research, Seattle Children's Research Institute, Seattle, WA 98109, USA
| | - Erika L Flannery
- Center for Global Infectious Disease Research, Seattle Children's Research Institute, Seattle, WA 98109, USA
| | - Sean C Murphy
- Departments of Laboratory Medicine and Microbiology and Center for Emerging and Re-emerging Infectious Diseases, University of Washington, Seattle, WA 98109, USA
| | - D Noah Sather
- Center for Global Infectious Disease Research, Seattle Children's Research Institute, Seattle, WA 98109, USA; Department of Pediatrics, University of Washington, Seattle, WA 98105, USA; Department of Global Health, University of Washington, Seattle, WA 98105, USA
| | - Simon J Draper
- The Jenner Institute, University of Oxford, Oxford OX3 7DQ, UK
| | - Jetsumon Sattabongkot
- Mahidol Vivax Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok 10400, Thailand
| | - Sebastian A Mikolajczak
- Center for Global Infectious Disease Research, Seattle Children's Research Institute, Seattle, WA 98109, USA
| | - Stefan H I Kappe
- Center for Global Infectious Disease Research, Seattle Children's Research Institute, Seattle, WA 98109, USA; Department of Pediatrics, University of Washington, Seattle, WA 98105, USA; Department of Global Health, University of Washington, Seattle, WA 98105, USA.
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26
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Radchatawedchakoon W, Niyomtham N, Thongbamrer C, Posa C, Sakee U, Roobsoong W, Sattabongkot J, Opanasopit P, Yingyongnarongkul B. Synthesis and Transfection Efficiencies of Divalent Ammonium Headgroup Cationic Lipids with Different Hydrophobic Tails. Russ J Bioorg Chem 2020. [DOI: 10.1134/s1068162020030140] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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27
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Ngernna S, Rachaphaew N, Thammapalo S, Prikchoo P, Kaewnah O, Manopwisedjaroen K, Phumchuea K, Suansomjit C, Roobsoong W, Sattabongkot J, Cui L, Nguitragool W. Case Report: Case Series of Human Plasmodium knowlesi Infection on the Southern Border of Thailand. Am J Trop Med Hyg 2020; 101:1397-1401. [PMID: 31595871 PMCID: PMC6896887 DOI: 10.4269/ajtmh.19-0063] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/04/2022] Open
Abstract
Although human infections of Plasmodium knowlesi have been found throughout Southeast Asia, most cases originated from Malaysian Borneo. In Thailand, P. knowlesi malaria was considered extremely rare. However, during October 2017–September 2018, there was a surge in the number of reported P. knowlesi cases. Here, a series of six cases of P. knowlesi malaria found during this period in Songkhla and Narathiwat provinces of southern Thailand are presented. All cases were confirmed by polymerase chain reaction. The unprecedented case number in the affected area is a warning sign of an increasing P. knowlesi burden in the south of Thailand.
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Affiliation(s)
- Sutharinee Ngernna
- Department of Molecular Tropical Medicine and Genetics, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Nattawan Rachaphaew
- Mahidol Vivax Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Suwich Thammapalo
- Office of Disease Prevention and Control Region 12 Songkhla, Department of Disease Control, Ministry of Public Health, Songkhla, Thailand
| | - Pathomporn Prikchoo
- Office of Disease Prevention and Control Region 12 Songkhla, Department of Disease Control, Ministry of Public Health, Songkhla, Thailand
| | - Opart Kaewnah
- Vector-Borne Diseases Control Center 12.2, Songkhla, Department of Disease Control, Ministry of Public Health, Songkhla, Thailand
| | | | - Kanit Phumchuea
- Mahidol Vivax Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Chayanut Suansomjit
- Mahidol Vivax Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Wanlapa Roobsoong
- Mahidol Vivax Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Jetsumon Sattabongkot
- Mahidol Vivax Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Liwang Cui
- Department of Internal Medicine, Morsani College of Medicine, University of South Florida, Tampa, Florida
| | - Wang Nguitragool
- Department of Molecular Tropical Medicine and Genetics, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
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28
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Chim-Ong A, Surit T, Chainarin S, Roobsoong W, Sattabongkot J, Cui L, Nguitragool W. The Blood Stage Antigen RBP2-P1 of Plasmodium vivax Binds Reticulocytes and Is a Target of Naturally Acquired Immunity. Infect Immun 2020; 88:e00616-19. [PMID: 32014895 PMCID: PMC7093139 DOI: 10.1128/iai.00616-19] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2019] [Accepted: 01/21/2020] [Indexed: 11/20/2022] Open
Abstract
The interactions between Plasmodium parasites and human erythrocytes are prime targets of blood stage malaria vaccine development. The reticulocyte binding protein 2-P1 (RBP2-P1) of Plasmodium vivax, a member of the reticulocyte binding protein family, has recently been shown to be highly antigenic in several settings endemic for malaria. Yet, its functional characteristics and the relevance of its antibody response in human malaria have not been examined. In this study, the potential function of RBP2-P1 as an invasion ligand of P. vivax was evaluated. The protein was found to be expressed in schizonts, be localized at the apical end of the merozoite, and preferentially bind reticulocytes over normocytes. Human antibodies to this protein also exhibit erythrocyte binding inhibition at physiologically relevant concentrations. Furthermore, RBP2-P1 antibodies are associated with lower parasitemia and tend to be higher in asymptomatic carriers than in patients. This study provides evidence supporting a role of RBP2-P1 as an invasion ligand and its consideration as a vaccine target.
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Affiliation(s)
- Anongruk Chim-Ong
- Department of Molecular Tropical Medicine and Genetics, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Thitiporn Surit
- Department of Clinical Tropical Medicine, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Sittinont Chainarin
- Department of Molecular Tropical Medicine and Genetics, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Wanlapa Roobsoong
- Mahidol Vivax Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Jetsumon Sattabongkot
- Mahidol Vivax Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Liwang Cui
- Department of Internal Medicine, Morsani College of Medicine, University of South Florida, Tampa, Florida, USA
| | - Wang Nguitragool
- Department of Molecular Tropical Medicine and Genetics, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
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29
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Qiu Y, Zhao Y, Liu F, Ye B, Zhao Z, Thongpoon S, Roobsoong W, Sattabongkot J, Cui L, Fan Q, Cao Y. Evaluation of Plasmodium vivax HAP2 as a transmission-blocking vaccine candidate. Vaccine 2020; 38:2841-2848. [PMID: 32093983 DOI: 10.1016/j.vaccine.2020.02.011] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2019] [Revised: 01/31/2020] [Accepted: 02/05/2020] [Indexed: 12/23/2022]
Abstract
Transmission-blocking vaccine (TBV) is a promising strategy to interfere with the transmission of malaria. To date, only limited TBV candidate antigens have been identified for Plasmodium vivax. HAP2 is a gamete membrane fusion protein, with homology to the class II viral fusion proteins. Herein we reported the characterization of the PvHAP2 for its potential as a TBV candidate for P. vivax. The HAP2/GCS1 domain of PvHAP2 was expressed in the baculovirus expression system and the recombinant protein was used to raise antibodies in rabbits. Indirect immunofluorescence assays showed that anti-PvHAP2 antibodies reacted only with the male gametocytes on blood smears. Direct membrane feeding assays were conducted using four field P. vivax isolates in Anopheles dirus. At a mean infection intensity of 72.4, 70.7, 51.3, and 15.6 oocysts/midgut with the control antibodies, anti-PvHAP2 antibodies significantly reduced the midgut oocyst intensity by 40.3, 44.4, 61.9, and 89.7%. Whereas the anti-PvHAP2 antibodies were not effective in reducing the infection prevalence at higher parasite exposure (51.3-72.4 oocysts/midgut in the control group), the anti-PvHAP2 antibodies reduced infection prevalence by 50% at a low challenge (15.6 oocysts/midgut). Multiple sequence alignment showed 100% identity among these Thai P. vivax isolates, suggesting that polymorphism may not be an impediment for the utilization of PvHAP2 as a TBV antigen. In conclusion, our results suggest that PvHAP2 could serve as a TBV candidate for P. vivax, and further optimization and evaluation are warranted.
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Affiliation(s)
- Yue Qiu
- Department of Immunology, College of Basic Medical Science, China Medical University, Shenyang, Liaoning 110122, China
| | - Yan Zhao
- Department of Immunology, College of Basic Medical Science, China Medical University, Shenyang, Liaoning 110122, China
| | - Fei Liu
- Department of Immunology, College of Basic Medical Science, China Medical University, Shenyang, Liaoning 110122, China
| | - Bo Ye
- Dalian Institute of Biotechnology, Dalian, Liaoning, China
| | - Zhenjun Zhao
- Dalian Institute of Biotechnology, Dalian, Liaoning, China
| | - Sataporn Thongpoon
- Mahidol Vivax Research Unit, Faculty of Tropical Medicine, Mahidol University, Thailand
| | - Wanlapa Roobsoong
- Mahidol Vivax Research Unit, Faculty of Tropical Medicine, Mahidol University, Thailand
| | - Jetsumon Sattabongkot
- Mahidol Vivax Research Unit, Faculty of Tropical Medicine, Mahidol University, Thailand
| | - Liwang Cui
- Department of Internal Medicine, Morsani College of Medicine, University of South Florida, 3720 Spectrum Boulevard, Suite 304, Tampa, FL 33612, USA
| | - Qi Fan
- Dalian Institute of Biotechnology, Dalian, Liaoning, China
| | - Yaming Cao
- Department of Immunology, College of Basic Medical Science, China Medical University, Shenyang, Liaoning 110122, China.
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30
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Radchatawedchakoon W, Thongbamrer C, Konbamrung W, Khattawee P, Sakee U, Roobsoong W, Sattabongkot J, Opanasopit P, Yingyongnarongkul BE. The effect of polar headgroups and spacer length on the DNA transfection of cholesterol-based cationic lipids. RSC Med Chem 2020; 11:212-224. [PMID: 33479628 PMCID: PMC7484938 DOI: 10.1039/c9md00459a] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2019] [Accepted: 12/11/2019] [Indexed: 01/31/2023] Open
Abstract
This article is related to the effects of the headgroups and spacer length of cationic lipids on transfection efficiency. To develop highly potent cationic lipids, a series of divalent lysine-diamine conjugated cholesterol-based cationic lipids with three different headgroups (ammonium, trimethyl ammonium, and guanidinium) were synthesized. The newly synthesized cationic lipids (1-6)A formed cationic liposomes in the presence and absence of a zwitterionic helper lipid, DOPE (dioleoylphosphatidylethanolamine). A gel retardation assay showed that most of the prepared lipoplexes could retard DNA migration in the presence of DOPE. We attempted to modify the diverse cationic headgroups to improve the transfection efficiency. However, the lysine-1,3-diaminopropane-conjugated cholesterol-based lipid 4A, having divalent ammonium of unmodified lysine headgroup, exhibited high relative transfection efficiency in HEK293. When the transfection efficiency of 4A was formulated with DOPE (1 : 1 weight ratio), it produced the same range in comparison with that of a commercially available transfection agent, Lipofectamine™ 2000 (L2k). The lipid 4A was studied to optimize the conditions with respect to the lipid/DOPE and DNA/lipid ratios and the amount of DNA. The transfection efficiency of the highly potent lipid 4A was also studied to determine the transfection efficiency of HeLa, PC3, and HC-04 cell lines. This lipid also protected the DNA from a serum and had low toxicity. Lipoplexes 4A with DOPE had the particle size of around 300-600 nm and the zeta potential of around 0-45 mV. In summary, cationic liposomes 4A demonstrated a high performance as DNA carriers.
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Affiliation(s)
- Widchaya Radchatawedchakoon
- Creative Chemistry and Innovation Research Unit , Department of Chemistry and Center of Excellence for Innovation in Chemistry (PERCH-CIC) , Faculty of Science , Mahasarakham University , Maha Sarakham , 44150 , Thailand . ; ; ; Tel: +66 43 754246
| | - Chopaka Thongbamrer
- Department of Chemistry and Center of Excellence for Innovation in Chemistry (PERCH-CIC) , Faculty of Science , Ramkhamhaeng University , Bangkok , 10240 , Thailand
| | - Wuttiphong Konbamrung
- Creative Chemistry and Innovation Research Unit , Department of Chemistry and Center of Excellence for Innovation in Chemistry (PERCH-CIC) , Faculty of Science , Mahasarakham University , Maha Sarakham , 44150 , Thailand . ; ; ; Tel: +66 43 754246
| | - Phakamas Khattawee
- Department of Chemistry and Center of Excellence for Innovation in Chemistry (PERCH-CIC) , Faculty of Science , Ramkhamhaeng University , Bangkok , 10240 , Thailand
| | - Uthai Sakee
- Creative Chemistry and Innovation Research Unit , Department of Chemistry and Center of Excellence for Innovation in Chemistry (PERCH-CIC) , Faculty of Science , Mahasarakham University , Maha Sarakham , 44150 , Thailand . ; ; ; Tel: +66 43 754246
| | - 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
| | - Praneet Opanasopit
- Pharmaceutical Development of Green Innovations Group (PDGIG) , Faculty of Pharmacy , Silpakorn University , Nakhon Pathom , 73000 , Thailand
| | - Boon-Ek Yingyongnarongkul
- Department of Chemistry and Center of Excellence for Innovation in Chemistry (PERCH-CIC) , Faculty of Science , Ramkhamhaeng University , Bangkok , 10240 , Thailand
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Brashear AM, Roobsoong W, Siddiqui FA, Nguitragool W, Sattabongkot J, López-Uribe MM, Miao J, Cui L. A glance of the blood stage transcriptome of a Southeast Asian Plasmodium ovale isolate. PLoS Negl Trop Dis 2019; 13:e0007850. [PMID: 31730621 PMCID: PMC6881071 DOI: 10.1371/journal.pntd.0007850] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2019] [Revised: 11/27/2019] [Accepted: 10/16/2019] [Indexed: 11/24/2022] Open
Abstract
Plasmodium ovale accounts for a disproportionate number of travel-related malaria cases. This parasite is understudied since there is a reliance on clinical samples. We collected a P. ovale curtisi parasite isolate from a clinical case in western Thailand and performed RNA-seq analysis on the blood stage transcriptomes. Using both de novo assembly and alignment-based methods, we detected the transcripts for 6628 out of 7280 annotated genes. For those lacking evidence of expression, the vast majority belonged to the PIR and STP1 gene families. We identified new splicing patterns for over 2500 genes, and mapped at least one untranslated region for over half of all annotated genes. Our analysis also detected a notable presence of anti-sense transcripts for over 10% of P. ovale curtisi genes. This transcriptomic analysis provides new insights into the blood-stage biology of this neglected parasite. Ovale malaria can be caused by one of two Plasmodium parasites, P. ovale curtisi and P. ovale wallikeri. P. ovale parasites are especially adept at evading prophylactic antimalarial drugs and traveling internationally, which makes them interesting from a global health perspective. Due to the lack of a continuous culture system for these parasites, research on P. ovale parasites has lagged behind and relies on clinical samples. Recent genome sequencing of a few P. ovale clinical isolates provides the blueprint of the parasite genome and in silico prediction of parasite genes. However, confirmation of the annotated genes and proof of their expression are needed. Here we obtained a P. ovale curtisi clinical isolate from western Thailand and performed RNA-seq analysis on the blood-stage parasites. High-quality RNA-seq data has enabled us to identify transcripts for 6628 of the 7280 annotated genes. Consistent with the blood stage development, housekeeping genes such as those involved in translation and metabolism are highly expressed. Prediction of the UTRs as well as detection of anti-sense transcripts and potential splicing patterns suggests the presence of complex gene regulation mechanisms for this parasite. This transcriptome dataset will serve as a useful resource for future studies of P. ovale.
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Affiliation(s)
- Awtum M Brashear
- Department of Entomology, Pennsylvania State University, Department of Entomology, University Park, Pennsylvania, United States of America.,Department of Internal Medicine, University of South Florida, Tampa, Florida, United States of America
| | - Wanlapa Roobsoong
- Mahidol Vivax Research Unit, Faculty of Tropical Medicine, Mahidol University, Thailand
| | - Faiza A Siddiqui
- Department of Internal Medicine, University of South Florida, Tampa, Florida, United States of America
| | - Wang Nguitragool
- Department of Molecular Tropical Medicine and Genetics, Faculty of Tropical Medicine, Mahidol University, Thailand
| | - Jetsumon Sattabongkot
- Mahidol Vivax Research Unit, Faculty of Tropical Medicine, Mahidol University, Thailand
| | - Margarita M López-Uribe
- Department of Entomology, Pennsylvania State University, Department of Entomology, University Park, Pennsylvania, United States of America
| | - Jun Miao
- Department of Internal Medicine, University of South Florida, Tampa, Florida, United States of America
| | - Liwang Cui
- Department of Entomology, Pennsylvania State University, Department of Entomology, University Park, Pennsylvania, United States of America.,Department of Internal Medicine, University of South Florida, Tampa, Florida, United States of America
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32
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Ngernna S, Chim-Ong A, Roobsoong W, Sattabongkot J, Cui L, Nguitragool W. Efficient synchronization of Plasmodium knowlesi in vitro cultures using guanidine hydrochloride. Malar J 2019; 18:148. [PMID: 31023359 PMCID: PMC6482532 DOI: 10.1186/s12936-019-2783-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2019] [Accepted: 04/16/2019] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND Long-term in vitro culture of blood stage Plasmodium parasites invariably leads to asynchronous parasite development. The most often used technique to synchronize Plasmodium falciparum culture is sorbitol treatment, which differentially induces osmotic lysis of trophozoite- and schizont-infected red blood cells due to presence of the new permeation pathways in the membranes of these cells. However, sorbitol treatment does not work well when used to synchronize the culture-adapted Plasmodium knowlesi A1-H.1 line. METHODS A number of common solutes were tested in lieu of sorbitol for synchronization of P. knowlesi A1-H.1 ring stage. RESULTS Guanidine hydrochloride was found to selectively lyse trophozoite- and schizont-infected red blood cells, yielding highly synchronous and viable rings. CONCLUSIONS A method for synchronization of P. knowlesi in human red blood cells was developed. Requiring only common laboratory reagents, this method is simple and should be applicable to most laboratory settings.
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Affiliation(s)
- Sutharinee Ngernna
- Department of Molecular Tropical Medicine, Faculty of Tropical Medicine, Mahidol University, 420/6 Ratchawithi Road, Ratchathewi, Bangkok, 10400, Thailand
| | - Anongruk Chim-Ong
- Department of Molecular Tropical Medicine, Faculty of Tropical Medicine, Mahidol University, 420/6 Ratchawithi Road, Ratchathewi, Bangkok, 10400, Thailand
| | - Wanlapa Roobsoong
- Mahidol Vivax Research Unit, Faculty of Tropical Medicine, Mahidol University, 420/6 Ratchawithi Road, Ratchathewi, Bangkok, 10400, Thailand
| | - Jetsumon Sattabongkot
- Mahidol Vivax Research Unit, Faculty of Tropical Medicine, Mahidol University, 420/6 Ratchawithi Road, Ratchathewi, Bangkok, 10400, Thailand
| | - Liwang Cui
- Department of Internal Medicine, Morsani College of Medicine, University of South Florida, Tampa, FL, USA
| | - Wang Nguitragool
- Department of Molecular Tropical Medicine, Faculty of Tropical Medicine, Mahidol University, 420/6 Ratchawithi Road, Ratchathewi, Bangkok, 10400, Thailand.
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Niu G, Franc A C, Zhang G, Roobsoong W, Nguitragool W, Wang X, Prachumsri J, Butler NS, Li J. The fibrinogen-like domain of FREP1 protein is a broad-spectrum malaria transmission-blocking vaccine antigen. J Biol Chem 2017; 292:11960-11969. [PMID: 28533429 DOI: 10.1074/jbc.m116.773564] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2016] [Revised: 05/15/2017] [Indexed: 01/01/2023] Open
Abstract
FREP1 in mosquito midguts facilitates Plasmodium falciparum parasite transmission. The fibrinogen-like (FBG) domain of FREP1 is highly conserved (>90% identical) among Anopheles species from different continents, suggesting that anti-FBG antibodies may block malaria transmission to all anopheline mosquitoes. Using standard membrane-feeding assays, anti-FREP1 polyclonal antibodies significantly blocked transmission of Plasmodium berghei and Plasmodium vivax to Anopheles gambiae and Anopheles dirus, respectively. Furthermore, in vivo studies of mice immunized with FBG achieved >75% blocking efficacy of P. berghei to A. gambiae without triggering immunopathology. Anti-FBG serum also reduced >81% of P. falciparum infection to A. gambiae Finally, we showed that FBG interacts with Plasmodium gametocytes and ookinetes, revealing the molecular mechanism of its antibody transmission-blocking activity. Collectively, our data support that FREP1-mediated Plasmodium transmission to mosquitoes is a conserved pathway and that targeting the FBG domain of FREP1 will limit the transmission of multiple Plasmodium species to multiple Anopheles species.
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Affiliation(s)
- Guodong Niu
- Department of Biological Sciences, Florida International University, Miami, Florida 33199
| | - Caio Franc A
- Department of Chemistry and Biochemistry, University of Oklahoma, Norman, Oklahoma 73019
| | - Genwei Zhang
- Department of Chemistry and Biochemistry, University of Oklahoma, Norman, Oklahoma 73019
| | - Wanlapa Roobsoong
- Mahidol Vivax Research Center, Mahidol University Faculty of Tropical Medicine, Bangkok 10400, Thailand
| | - Wang Nguitragool
- Mahidol Vivax Research Center, Mahidol University Faculty of Tropical Medicine, Bangkok 10400, Thailand
| | - Xiaohong Wang
- Department of Biological Sciences, Florida International University, Miami, Florida 33199
| | - Jetsumon Prachumsri
- Mahidol Vivax Research Center, Mahidol University Faculty of Tropical Medicine, Bangkok 10400, Thailand
| | - Noah S Butler
- Department of Microbiology and Immunology, University of Iowa, Iowa City, Iowa 52242
| | - Jun Li
- Department of Biological Sciences, Florida International University, Miami, Florida 33199; Department of Chemistry and Biochemistry, University of Oklahoma, Norman, Oklahoma 73019.
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34
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Kiattibutr K, Roobsoong W, Sriwichai P, Saeseu T, Rachaphaew N, Suansomjit C, Buates S, Obadia T, Mueller I, Cui L, Nguitragool W, Sattabongkot J. Infectivity of symptomatic and asymptomatic Plasmodium vivax infections to a Southeast Asian vector, Anopheles dirus. Int J Parasitol 2016; 47:163-170. [PMID: 28043858 DOI: 10.1016/j.ijpara.2016.10.006] [Citation(s) in RCA: 64] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2016] [Revised: 10/06/2016] [Accepted: 10/12/2016] [Indexed: 12/13/2022]
Abstract
Plasmodium vivax is now the predominant species causing malarial infection and disease in most non-African areas, but little is known about its transmission efficiency from human to mosquitoes. Because the majority of Plasmodium infections in endemic areas are low density and asymptomatic, it is important to evaluate how well these infections transmit. Using membrane feeding apparatus, Anopheles dirus were fed with blood samples from 94 individuals who had natural P. vivax infections with parasitemias spanning four orders of magnitude. We found that the mosquito infection rate was positively correlated with blood parasitemia and that infection began to rise when parasitemia was >10parasites/μl. Below this threshold, mosquito infection is rare and associated with very few oocysts. These findings provide useful information for assessing the human reservoir of transmission and for establishing diagnostic sensitivity required to identify individuals who are most infective to mosquitoes.
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Affiliation(s)
- Kirakorn Kiattibutr
- Mahidol Vivax Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Wanlapa Roobsoong
- Mahidol Vivax Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Patchara Sriwichai
- Department of Medical Entomology, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Teerawat Saeseu
- Mahidol Vivax Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Nattawan Rachaphaew
- Mahidol Vivax Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Chayanut Suansomjit
- Department of Microbiology, Faculty of Science, Mahidol University, Bangkok, Thailand
| | - Sureemas Buates
- Department of Microbiology, Faculty of Science, Mahidol University, Bangkok, Thailand
| | - Thomas Obadia
- Malaria: Parasites & Hosts Unit, Department of Parasites & Insect Vectors, Institut Pasteur, Paris, France; Bioinformatics and Biostatistics Hub, Institut Pasteur, Paris, France
| | - Ivo Mueller
- Malaria: Parasites & Hosts Unit, Department of Parasites & Insect Vectors, Institut Pasteur, Paris, France; Population Health and Immunity Division, Walter and Eliza Hall Institute of Medical Research, Melbourne, Australia
| | - Liwang Cui
- Department of Entomology, Pennsylvania State University, University Park, PA, USA
| | - Wang Nguitragool
- Department of Molecular Tropical Medicine & Genetics, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand.
| | - Jetsumon Sattabongkot
- Mahidol Vivax Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand.
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35
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Hupalo DN, Luo Z, Melnikov A, Sutton PL, Rogov P, Escalante A, Vallejo AF, Herrera S, Arévalo-Herrera M, Fan Q, Wang Y, Cui L, Lucas CM, Durand S, Sanchez JF, Baldeviano GC, Lescano AG, Laman M, Barnadas C, Barry A, Mueller I, Kazura JW, Eapen A, Kanagaraj D, Valecha N, Ferreira MU, Roobsoong W, Nguitragool W, Sattabonkot J, Gamboa D, Kosek M, Vinetz JM, González-Cerón L, Birren BW, Neafsey DE, Carlton JM. Population genomics studies identify signatures of global dispersal and drug resistance in Plasmodium vivax. Nat Genet 2016; 48:953-8. [PMID: 27348298 DOI: 10.1038/ng.3588] [Citation(s) in RCA: 134] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2015] [Accepted: 05/13/2016] [Indexed: 12/13/2022]
Abstract
Plasmodium vivax is a major public health burden, responsible for the majority of malaria infections outside Africa. We explored the impact of demographic history and selective pressures on the P. vivax genome by sequencing 182 clinical isolates sampled from 11 countries across the globe, using hybrid selection to overcome human DNA contamination. We confirmed previous reports of high genomic diversity in P. vivax relative to the more virulent Plasmodium falciparum species; regional populations of P. vivax exhibited greater diversity than the global P. falciparum population, indicating a large and/or stable population. Signals of natural selection suggest that P. vivax is evolving in response to antimalarial drugs and is adapting to regional differences in the human host and the mosquito vector. These findings underline the variable epidemiology of this parasite species and highlight the breadth of approaches that may be required to eliminate P. vivax globally.
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Affiliation(s)
- Daniel N Hupalo
- Center for Genomics and Systems Biology, Department of Biology, New York University, New York, New York, USA
| | - Zunping Luo
- Center for Genomics and Systems Biology, Department of Biology, New York University, New York, New York, USA
| | | | - Patrick L Sutton
- Center for Genomics and Systems Biology, Department of Biology, New York University, New York, New York, USA
| | - Peter Rogov
- Broad Institute of MIT and Harvard, Cambridge, Massachusetts, USA
| | - Ananias Escalante
- Institute for Genomics and Evolutionary Medicine, Department of Biology, Temple University, Philadelphia, Pennsylvania, USA
| | | | | | - Myriam Arévalo-Herrera
- Caucaseco Scientific Research Center, Cali, Colombia.,Faculty of Health, Universidad del Valle, Cali, Colombia
| | - Qi Fan
- Dalian Institute of Biotechnology, Dalian, Liaoning, China
| | - Ying Wang
- Third Military Medical University, Shapingba, Chongqing, China
| | - Liwang Cui
- Department of Entomology, Pennsylvania State University, University Park, Pennsylvania, USA
| | | | | | | | | | | | - Moses Laman
- Papua New Guinea Institute of Medical Research, Madang, Papua, New Guinea
| | - Celine Barnadas
- Vector Borne Diseases Unit, Papua New Guinea Institute of Medical Research, Goroka, Papua New Guinea.,Division of Infection and Immunity, Walter &Eliza Hall Institute of Medical Research, Parkville, Australia
| | - Alyssa Barry
- Division of Population Health and Immunity, Walter and Eliza Hall Institute of Medical Research, Parkville, Victoria, Australia.,Department of Medical Biology, University of Melbourne, Carlton, Victoria, Australia
| | - Ivo Mueller
- Division of Population Health and Immunity, Walter and Eliza Hall Institute of Medical Research, Parkville, Victoria, Australia.,Department of Medical Biology, University of Melbourne, Carlton, Victoria, Australia.,Institute of Global Health (ISGLOBAL), Barcelona, Spain
| | - James W Kazura
- Center for Global Health and Diseases, Case Western Reserve University, Cleveland, Ohio, USA
| | - Alex Eapen
- National Institute of Malaria Research Field Unit, Indian Council of Medical Research, National Institute of Epidemiology Campus, Chennai, Tamil Nadu, India
| | - Deena Kanagaraj
- National Institute of Malaria Research Field Unit, Indian Council of Medical Research, National Institute of Epidemiology Campus, Chennai, Tamil Nadu, India
| | - Neena Valecha
- National Institute of Malaria Research, Indian Council of Medical Research, New Delhi, India
| | - Marcelo U Ferreira
- Department of Parasitology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil
| | - Wanlapa Roobsoong
- Mahidol Vivax Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Wang Nguitragool
- Department of Molecular Tropical Medicine and Genetics, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Jetsumon Sattabonkot
- Mahidol Vivax Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Dionicia Gamboa
- Instituto de Medicine Tropical Alexander von Humboldt, Universidad Peruana Cayetano Heredia, Lima, Peru.,Departamento de Ciencias Celulares y Moleculares, Universidad Peruana Cayetano Heredia, Lima, Peru
| | - Margaret Kosek
- Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA
| | - Joseph M Vinetz
- Instituto de Medicine Tropical Alexander von Humboldt, Universidad Peruana Cayetano Heredia, Lima, Peru.,Departamento de Ciencias Celulares y Moleculares, Universidad Peruana Cayetano Heredia, Lima, Peru.,Division of Infectious Diseases, Department of Medicine, University of California San Diego, La Jolla, California, USA
| | - Lilia González-Cerón
- Regional Centre for Research in Public Health, National Institute for Public Health, Tapachula, Chiapas, México
| | - Bruce W Birren
- Broad Institute of MIT and Harvard, Cambridge, Massachusetts, USA
| | - Daniel E Neafsey
- Broad Institute of MIT and Harvard, Cambridge, Massachusetts, USA
| | - Jane M Carlton
- Center for Genomics and Systems Biology, Department of Biology, New York University, New York, New York, USA
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Abstract
Plasmodium vivax is considered as the most widely distributed human malaria parasite outside Africa. Studies of P. vivax malaria have always been limited due to the lack of continuously in vitro-propagated parasite lines. Due to this limitation, studies on P. vivax have lagged behind that of P. falciparum, which is routinely maintained in in vitro blood-stage culture. This method allows for the short-term ex vivo culture of P. vivax blood stages and as such offers a wealth of opportunities to study the biology of the blood stages of the parasite. In this chapter we describe the in vitro erythrocyte invasion inhibition assay (IIA) for P. vivax, which can be used as a powerful tool for blood-stage vaccine screening. The major challenges of this assay are the purification of schizont-stage parasites and host reticulocytes. The purification methods for both P. vivax schizont-stage parasites and reticulocytes as detailed here have been developed and simplified. The protocols in this chapter have been optimized to ensure that IIA becomes a more feasible and reliable assay.
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Affiliation(s)
- Wanlapa Roobsoong
- Mahidol Vivax Research Unit, Faculty of Tropical Medicine, Mahidol University, 420/6 Ratchawithi Road, Ratchathewi, Bangkok, 10400, Thailand.
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37
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Mikolajczak S, Vaughan A, Kangwanrangsan N, Roobsoong W, Fishbaugher M, Yimamnuaychok N, Rezakhani N, Lakshmanan V, Singh N, Kaushansky A, Camargo N, Baldwin M, Lindner S, Adams J, Sattabongkot J, Kappe S. Plasmodium vivax Liver Stage Development and Hypnozoite Persistence in Human Liver-Chimeric Mice. Cell Host Microbe 2015. [DOI: 10.1016/j.chom.2015.03.015] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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38
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Roobsoong W, Maher SP, Rachaphaew N, Barnes SJ, Williamson KC, Sattabongkot J, Adams JH. A rapid sensitive, flow cytometry-based method for the detection of Plasmodium vivax-infected blood cells. Malar J 2014; 13:55. [PMID: 24528780 PMCID: PMC3942109 DOI: 10.1186/1475-2875-13-55] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2013] [Accepted: 01/22/2014] [Indexed: 11/15/2022] Open
Abstract
Background Plasmodium vivax preferentially infects Duffy-positive reticulocytes and infections typically have few parasite-infected cells in the peripheral circulation. These features complicate detection and quantification by flow cytometry (FC) using standard nucleic acid-based staining methods. A simple antibody-based FC method was developed for rapid parasite detection along with simultaneous detection of other parasite and erythrocyte markers. Methods Clinical samples were collected from patients diagnosed with P. vivax at a district Malaria Clinic in Kanchanaburi, Thailand. One μL of infected blood was washed, fixed, stained with a Plasmodium pan-specific anti-PfBiP antibody conjugated with Alexa Fluor 660, and analysed by FC. Additional primary conjugated antibodies for stage-specific markers of P. vivax for late trophozoite-early schizonts (MSP1-Alexa Fluor 660), late-stage schizonts (DBP-Alexa Fluor 555), and sexual stages (Pvs16) were used to differentiate intra-erythrocytic developmental stages. Results The percentages of P. vivax-infected cells determined by the FC method and manually by microscopic examination of Giemsa-stained thick blood smears were positively correlated by Spearman’s rank correlation coefficient (R2 = 0.93843) from 0.001 to 1.00% P. vivax-infected reticulocytes. Conclusions The FC-based method is a simple, robust, and efficient method for detecting P. vivax-infected reticulocytes.
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Affiliation(s)
| | | | | | | | | | | | - John H Adams
- Department of Global Health, College of Public Health, University of South Florida, Tampa, FL, USA.
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39
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Roobsoong W, Roytrakul S, Sattabongkot J, Li J, Udomsangpetch R, Cui L. Determination of the Plasmodium vivax schizont stage proteome. J Proteomics 2011; 74:1701-10. [PMID: 21515433 DOI: 10.1016/j.jprot.2011.03.035] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2010] [Revised: 03/29/2011] [Accepted: 03/30/2011] [Indexed: 10/18/2022]
Abstract
With the genome of the malaria parasite Plasmodium vivax sequenced, it is important to determine the proteomes of the parasite in order to assist efforts in antigen and drug target discovery. Since a method for continuous culture of P. vivax parasite is not available, we tried to study the proteome of the erythrocytic stages using fresh parasite isolates from patients. In schizont-enriched samples, 316 proteins were confidently identified by tandem mass spectrometry. Almost 50% of the identified proteins were hypothetical, while other major categories include proteins with binding function, protein fate, protein synthesis, metabolism and cellular transport. To identify proteins that are recognized by host humoral immunity, parasite proteins were separated by two-dimensional gel electrophoresis and screened by Western blot using an immune serum from a P. vivax patient. Mass spectrometry analysis of protein spots recognized by the serum identified four potential antigens including PV24. The recombinant protein PV24 was recognized by antibodies from vivax malaria patients even during the convalescent period, indicating that PV24 could elicit long-lasting antibody responses in P. vivax patients.
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Affiliation(s)
- Wanlapa Roobsoong
- Faculty of Medical Technology, Mahidol University, Bangkok 10700, Thailand
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40
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Roobsoong W, Roytrakul S, Kiatfuengfoo R, Nuchpramool W, Cui L, Udomsangpetch R. Characterization of the Plasmodium vivax erythrocytic stage proteome and identification of a potent immunogenic antigen of the asexual stages. Malar J 2010. [PMCID: PMC2963286 DOI: 10.1186/1475-2875-9-s2-p44] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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