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Thái TL, Jun H, Lee J, Kang JM, Lê HG, Lin K, Thant KZ, Sohn WM, Kim TS, Na BK. Genetic diversity of merozoite surface protein-1 C-terminal 42 kDa of Plasmodium falciparum (PfMSP-1 42) may be greater than previously known in global isolates. Parasit Vectors 2018; 11:455. [PMID: 30081943 PMCID: PMC6080494 DOI: 10.1186/s13071-018-3027-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2018] [Accepted: 07/20/2018] [Indexed: 11/16/2022] Open
Abstract
Background The C-terminal 42 kDa region of merozoite surface protein-1 of Plasmodium falciparum (PfMSP-142) is the target of an immune response. It has been recognised as one of the promising candidate antigens for a blood-stage malaria vaccine. Genetic structure of PfMSP-142 has been considered to be largely conserved in the P. falciparum population. However, only limited information is currently available. This study aimed to analyse genetic diversity and the effect of natural selection on PfMSP-142 among the Myanmar P. falciparum population and compare them with publicly available PfMSP-142 from global P. falciparum populations. Methods A total of 69 P. falciparum clinical isolates collected from Myanmar malaria patients in Upper Myanmar in 2015 were used. The PfMSP-142 region was amplified by polymerase chain reaction, cloned and sequenced. Genetic structure and natural selection of this region were analysed using MEGA4 and DnaSP programs. Polymorphic nature and natural selection in global PfMSP-142 were also investigated. Results All three allele types (MAD20, K1, and RO33) of PfMSP-142 were identified in Myanmar isolates of P. falciparum. Myanmar PfMSP-142 displayed genetic diversity. Most polymorphisms were scattered in blocks 16 and 17. Polymorphisms observed in Myanmar PfMSP-142 showed a similar pattern to those of global PfMSP-142; however, they were not identical to each other. Genetic diversity of Myanmar PfMSP-142 was relatively lower than that of PfMSP-142 from different geographical regions. Evidence of natural selection and recombination were found. Comparative analysis of genetic polymorphism and natural selection in the global PfMSP-142 population suggested that this region was not tightly conserved in global PfMSP-142 as previously thought and is under the complicated influence of natural selection and recombination. Conclusions Global PfMSP-142 revealed limited, but non-negligible, genetic diversity by allele types and geographical origins. Complicated natural selection and potential recombination might have occurred in global PfMSP-142. Comprehensive monitoring of genetic diversity for global PfMSP-142 would be needed to better understand the polymorphic nature and evolutionary aspect of PfMSP-142 in the global P. falciparum population. More thought would be necessary for designing a vaccine based on PfMSP-142. Electronic supplementary material The online version of this article (10.1186/s13071-018-3027-x) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Thị Lam Thái
- Department of Parasitology and Tropical Medicine, and Institute of Health Sciences, Gyeongsang National University College of Medicine, Jinju, 52727, Republic of Korea.,BK21Plus Team for Anti-aging Biotechnology and Industry, Department of Convergence Medical Science, Gyeongsang National University, Jinju, 52727, Republic of Korea
| | - Hojong Jun
- Department of Tropical Medicine, and Inha Research Institute for Medical Sciences, Inha University College of Medicine, Incheon, 22212, Republic of Korea
| | - Jinyoung Lee
- Department of Tropical Medicine, and Inha Research Institute for Medical Sciences, Inha University College of Medicine, Incheon, 22212, Republic of Korea
| | - Jung-Mi Kang
- Department of Parasitology and Tropical Medicine, and Institute of Health Sciences, Gyeongsang National University College of Medicine, Jinju, 52727, Republic of Korea.,BK21Plus Team for Anti-aging Biotechnology and Industry, Department of Convergence Medical Science, Gyeongsang National University, Jinju, 52727, Republic of Korea
| | - Hương Giang Lê
- Department of Parasitology and Tropical Medicine, and Institute of Health Sciences, Gyeongsang National University College of Medicine, Jinju, 52727, Republic of Korea.,BK21Plus Team for Anti-aging Biotechnology and Industry, Department of Convergence Medical Science, Gyeongsang National University, Jinju, 52727, Republic of Korea
| | - Khin Lin
- Department of Medical Research Pyin Oo Lwin Branch, Pyin Oo Lwin, Myanmar
| | - Kyaw Zin Thant
- Department of Medical Research, Ministry of Health and Sports, Yangon, Myanmar
| | - Woon-Mok Sohn
- Department of Parasitology and Tropical Medicine, and Institute of Health Sciences, Gyeongsang National University College of Medicine, Jinju, 52727, Republic of Korea
| | - Tong-Soo Kim
- Department of Tropical Medicine, and Inha Research Institute for Medical Sciences, Inha University College of Medicine, Incheon, 22212, Republic of Korea.
| | - Byoung-Kuk Na
- Department of Parasitology and Tropical Medicine, and Institute of Health Sciences, Gyeongsang National University College of Medicine, Jinju, 52727, Republic of Korea. .,BK21Plus Team for Anti-aging Biotechnology and Industry, Department of Convergence Medical Science, Gyeongsang National University, Jinju, 52727, Republic of Korea.
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Ranjan R, Chugh M, Kumar S, Singh S, Kanodia S, Hossain MJ, Korde R, Grover A, Dhawan S, Chauhan VS, Reddy VS, Mohmmed A, Malhotra P. Proteome analysis reveals a large merozoite surface protein-1 associated complex on the Plasmodium falciparum merozoite surface. J Proteome Res 2010; 10:680-91. [PMID: 21175202 DOI: 10.1021/pr100875y] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Plasmodium merozoite surface protein-1 (MSP-1) is an essential antigen for the merozoite invasion of erythrocytes. A key challenge to the development of an effective malaria vaccine that can block the erythrocyte invasion is to establish the molecular interaction(s) among the parasite surface proteins as well as with the host cell encoded receptors. In the present study, we applied molecular interactions and proteome approaches to identify PfMSP-1 associated complex on the merozoite surface. Proteomic analysis identified a major malaria surface protein, PfRhopH3 interacting with PfMSP-1(42). Pull-down experiments with merozoite lysate using anti-PfMSP-1 or anti-PfRhopH3 antibodies showed 16 bands that when identified by tandem mass spectrometry corresponded to11 parasite proteins: PfMSP-3, PfMSP-6, PfMSP-7, PfMSP-9, PfRhopH3, PfRhopH1, PfRAP-1, PfRAP-2, and two RAP domain containing proteins. This MSP-1 associated complex was specifically seen at schizont/merozoite stages but not the next ring stage. We could also identify many of these proteins in culture supernatant, suggesting the shedding of the complex. Interestingly, the PfRhopH3 protein also showed binding to the human erythrocyte and anti-PfRhopH3 antibodies blocked the erythrocyte invasion of the merozoites. These results have potential implications in the development of PfMSP-1 based blood stage malaria vaccine.
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Affiliation(s)
- Ravi Ranjan
- International Centre for Genetic Engineering and Biotechnology, New Delhi, India
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Toward the rational design of a malaria vaccine construct using the MSP3 family as an example: contribution of antigenicity studies in humans. Infect Immun 2009; 78:486-94. [PMID: 19884337 DOI: 10.1128/iai.01359-08] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Plasmodium falciparum merozoite surface protein (MSP3) is a main target of protective immunity against malaria that is currently undergoing vaccine development. It was shown recently to belong, together with MSP6, to a new multigene family whose C-terminal regions have a similar organization, contain both homologous and divergent regions, and are highly conserved across isolates. In an attempt to rationally design novel vaccine constructs, we extended the analysis of antigenicity and function of region-specific antibodies, previously performed with MSP3 and MSP6, to the remaining four proteins of the MSP3 family using four recombinant proteins and 24 synthetic peptides. Antibodies to each MSP3 family antigen were found to be highly prevalent among malaria-exposed individuals from the village of Dielmo (Senegal). Each of the 24 peptides was antigenic, defining at least one epitope mimicking that of the native proteins, with a distinct IgG isotype pattern for each, although with an overall predominance of the IgG3 subclass. Human antibodies affinity purified upon each of the 24 peptides exerted an antiparasite antibody-dependent cellular inhibition effect, which in most cases was as strong as that of IgG from protected African adults. The two regions with high homology were found to generate a broad network of cross-reactive antibodies with various avidities. A first multigenic construct was designed using these findings and those from related immunogenicity studies in mice and demonstrated valuable immunological properties. These results indicate that numerous regions from the MSP3 family play a role in protection and provide a rationale for the tailoring of new MSP3-derived malaria vaccines.
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Reed ZH, Kieny MP, Engers H, Friede M, Chang S, Longacre S, Malhotra P, Pan W, Long C. Comparison of immunogenicity of five MSP1-based malaria vaccine candidate antigens in rabbits. Vaccine 2009; 27:1651-60. [DOI: 10.1016/j.vaccine.2008.10.093] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2006] [Revised: 10/21/2008] [Accepted: 10/27/2008] [Indexed: 10/21/2022]
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Mishra A, Panda JJ, Basu A, Chauhan VS. Nanovesicles based on self-assembly of conformationally constrained aromatic residue containing amphiphilic dipeptides. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2008; 24:4571-6. [PMID: 18358051 DOI: 10.1021/la7034533] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
Peptide-based vesicular structures have been the focus of research in the past decade for their potential application as drug delivery agents. We here report the self-assembly of amphiphilic dipeptides containing conformation-constraining alpha,beta-dehydrophenylalanine into nanovesicles. The vesicles can encapsulate small drug molecules such as riboflavin and vitamin B(12), bioactive peptides, and small protein molecules. The nanovesicles are resistant to treatment of a nonspecific protease, proteinase K, and are stable at low concentrations of monovalent and divalent cations. The vesicles are effectively taken up by actively growing cells in culture and show no observable cytopathic effects. These peptide-based nanostructures can be considered as models for further development as delivery agents for different biomolecules.
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Affiliation(s)
- Aseem Mishra
- International Centre for Genetic Engineering and Biotechnology, New Delhi, and National Institute of Virology, Pune, India
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Mehrizi AA, Zakeri S, Salmanian AH, Sanati MH, Djadid ND. Plasmodium falciparum: Sequence analysis of the gene encoding the C-terminus region of the merozoite surface protein-1, a potential malaria vaccine antigen, in Iranian clinical isolates. Exp Parasitol 2008; 118:378-85. [DOI: 10.1016/j.exppara.2007.10.001] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2007] [Revised: 09/18/2007] [Accepted: 10/02/2007] [Indexed: 10/22/2022]
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Mamillapalli A, Sunil S, Diwan SS, Sharma SK, Tyagi PK, Adak T, Joshi H, Malhotra P. Polymorphism and epitope sharing between the alleles of merozoite surface protein-1 of Plasmodium falciparum among Indian isolates. Malar J 2007; 6:95. [PMID: 17659072 PMCID: PMC1950510 DOI: 10.1186/1475-2875-6-95] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2007] [Accepted: 07/20/2007] [Indexed: 11/10/2022] Open
Abstract
Abstract
Background
The C-terminal region of merozoite surface protein-1 (MSP-1) is one of the leading candidates for vaccination against the erythrocytic stages of malaria. However, a major concern in the development of MSP-1 based malaria vaccine is the polymorphism observed in different geographical Plasmodium falciparum isolates. To explore whether the sequence heterogeneity of PfMSP-1 leads to variation in naturally acquired anti-MSP-119 antibodies, the present study was undertaken to study PfMSP-119 sequence polymorphism in malaria-endemic villages in eastern India and also carried out a competition enzyme-linked immunosorbent assay using three PfMSP-119 variant forms.
Methods
The sequence variations in the C-terminal region of PfMSP-119 were determined in a malaria endemic region. Three PfMSP-119 variants were produced in Escherichia coli (PfMSP119QKNG-L, PfMSP119EKNG-L and PfMSP119ETSR-F) and an immunodepletion assay was carried out using the corresponding patients' sera.
Results
Results revealed predominance of PfMAD20 allele among Indian field isolates. Seven PfMSP-119 variant forms were isolated in a singe geographical location. Three of PfMSP-119 variant forms when expressed in E. coli showed presence of cross-reaction as well as variant specific antibodies in malaria infected patient sera.
Conclusion
The present study demonstrates the existence of allele specific antibodies in P. falciparum-infected patient sera, however their role in protection requires further investigation. These results thereby, suggest the importance of a multi-allelic PfMSP-119 based vaccine for an effective malaria control.
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Hui G, Hashimoto C. Plasmodium falciparum anti-MSP1-19 antibodies induced by MSP1-42 and MSP1-19 based vaccines differed in specificity and parasite growth inhibition in terms of recognition of conserved versus variant epitopes. Vaccine 2006; 25:948-56. [PMID: 17023096 DOI: 10.1016/j.vaccine.2006.08.041] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2006] [Revised: 08/18/2006] [Accepted: 08/28/2006] [Indexed: 11/30/2022]
Abstract
The C-terminal 42 kDa fragment (MSP1-42) and its smaller 19 kDa subfragment (MSP1-19) of the Plasmodium falciparum merozoite surface protein, MSP1, are leading candidate malaria vaccines. Since the targets of protective immunity lie within the MSP1-19, we compared the anti-MSP1-19 antibodies induced by vaccination with recombinant MSP1-42 and MSP1-19. The specificities of the antibody responses were analyzed using five recombinant MSP1-19s expressing different naturally occurring variant amino acid residues. We observed dramatic differences in the specificities of the anti-MSP1-19 antibodies induced by the two vaccines. MSP1-42 consistently induced crossreactive antibodies; whereas the antibodies induced by recombinant MSP1-19 were highly variable among animals in terms of recognition of conserved versus variant epitopes. Of the variant residues examined, only a subset significantly contributed as part of immunogenic B epitopes. MSP1-42 consistently induced potent growth inhibitory antibodies that recognized conserved epitopes, leading to efficient inhibition of heterologous parasites. In contrast, MSP1-19 induced strong inhibitory antibody responses in only a subset of animals studied. In some of the MSP1-19 immunized animals, inhibition of homologous parasites may be due to recognition of inhibitory epitopes associated with the homologous variant residues, and the induction of antibodies to conserved inhibitory epitopes may not be efficiently achieved. These data suggest an advantage of using MSP1-42 over MSP1-19 based vaccines.
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Affiliation(s)
- George Hui
- Department of Tropical Medicine and Pharmacology, John A. Burns School of Medicine, University of Hawaii at Manoa, United States.
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Vijay Kumar S, Ranjan S, Saxena V, Rajesh V, Roy SK, Kochar D, Ranjan A, Das A. Plasmodium falciparum: Genetic diversity of C-terminal region of MSP-1 in isolates from Indian sub-continent. Exp Parasitol 2005; 110:384-8. [PMID: 15907839 DOI: 10.1016/j.exppara.2005.03.027] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2005] [Revised: 03/29/2005] [Accepted: 03/30/2005] [Indexed: 11/24/2022]
Abstract
Malaria parasites exhibit sequence diversity for a number of stage specific antigens. Several studies have proved that merozoite surface protein-1 (MSP-1) is an effective target eliciting a protective immune response. The MSP-1(42) region comprising two EGF-like domains is involved in generating protective immune response in humans and other experimental animals. Searching for point mutations in this region is essential in view of vaccine development. We have investigated the sequence variations in Plasmodium falciparum MSP-1 carboxy terminal region in field isolates from different regions in India. Our study reveals the presence of eight variant types of MSP-1(19) in the Indian sub-continent, which comprise of E-TSR-L, Q-TSR-L, E-TSG-L, Q-KNG-L, Q-KNG-F, E-KNG-L, E-KNG-F, and E-KYG-F. The last named allele is a novel variant being reported for the first time.
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Affiliation(s)
- S Vijay Kumar
- Department of Biological Sciences, Birla Institute of Technology and Science, Pilani, Rajasthan, India
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Raj DK, Das BR, Dash AP, Supakar PC. Identification of a rare point mutation at C-terminus of merozoite surface antigen-1 gene of Plasmodium falciparum in eastern Indian isolates. Exp Parasitol 2004; 106:45-9. [PMID: 15013788 DOI: 10.1016/j.exppara.2004.01.008] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2003] [Revised: 12/15/2003] [Accepted: 01/23/2004] [Indexed: 10/26/2022]
Abstract
Merozoite surface antigen-1 (MSA-1) of Plasmodium falciparum is highly immunogenic in human. Several studies suggest that MSA-1 protein is an effective target for a protective immune response. Attempt has been made to find new point mutations by analyzing 244 bp [codon 1655(R) to 1735 (I)] relatively conserved C-terminus region of MSA-1 gene in 125 isolates. This region contains two EGF like domains, which are involved in generating protective immune response in human. Point mutations in this region are very much important in view of vaccine development. Searching of mutational hot spots in MSA-1 protein by sequencing method in a representative number of isolates is quite critical and expensive. Therefore, in this study slot blot and PCR-SSCP method have been used to find out new mutations in the individual isolates showing alterations in the mobility of DNA fragment. Sequencing of the altered bands from the SSCP gel shows a rare non-synonymous point mutation in 7 (5.6%) of the 125 isolates at amino acid position 1704 of MSA-1 gene where isoleucine is replaced by valine.
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Affiliation(s)
- Dipak Kumar Raj
- Institute of Life Sciences, Nalco Square, Chandrasekharpur, Bhubaneswar 751 023, India
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