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Zhu H, Zhu D, Wu K, He W, Li L, Li T, Liu L, Liu Z, Song X, Cheng W, Mo J, Yao Y, Li J. Establishment and evaluation of a qPCR method for the detection of pfmdr1 mutations in Plasmodium falciparum, the causal agent of fatal malaria. Diagn Microbiol Infect Dis 2024; 110:116400. [PMID: 38909426 DOI: 10.1016/j.diagmicrobio.2024.116400] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2024] [Revised: 05/23/2024] [Accepted: 06/10/2024] [Indexed: 06/25/2024]
Abstract
Drug resistance surveillance is a major integral part of malaria control programs. Molecular methods play a pivotal role in drug resistance detection and related molecular research. This study aimed to develop a rapid and accurate detection method for drug resistance of Plasmodium falciparum (P. falciparum). A quantitative real-time PCR (qPCR) assay has been developed that identifies the mutation at locus A256T in the P.falciparum multi-drug resistance(pfmdr1) gene producing amino acid change at position 86. The results of 198 samples detected by qPCR were consistent with nested PCR and sequencing, giving an accuracy of 94.3%. The sensitivity, specificity, positive and negative predictive value of qPCR were 85.7%, 97.6%, 90.0% and 96.4%, respectively. The results of qPCR are basically consistent with the nested PCR, which is expected to replace the nested PCR as a new molecular biological method for drug resistance detection, providing reliable technical support for global malaria prevention and control.
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Affiliation(s)
- Huiyin Zhu
- Shiyan Key Laboratory of Virology, Hubei University of Medicine, Shiyan 442000, PR China; Department of Pediatrics, Taihe Hospital, Hubei University of Medicine, Shiyan, 442000, PR China
| | - Daiqian Zhu
- Shiyan Key Laboratory of Virology, Hubei University of Medicine, Shiyan 442000, PR China
| | - Kai Wu
- Wuhan Centers for Disease Prevention and Control, Wuhan 430024, PR China
| | - Wei He
- Jiangnan University, Wuxi 442000, PR China
| | - Liugen Li
- Shiyan Key Laboratory of Virology, Hubei University of Medicine, Shiyan 442000, PR China
| | - Tongfei Li
- Shiyan Key Laboratory of Virology, Hubei University of Medicine, Shiyan 442000, PR China
| | - Long Liu
- Shiyan Key Laboratory of Virology, Hubei University of Medicine, Shiyan 442000, PR China
| | - Zhixin Liu
- Shiyan Key Laboratory of Virology, Hubei University of Medicine, Shiyan 442000, PR China
| | - Xiaonan Song
- Shiyan Key Laboratory of Virology, Hubei University of Medicine, Shiyan 442000, PR China
| | - Weijia Cheng
- Shiyan Key Laboratory of Virology, Hubei University of Medicine, Shiyan 442000, PR China
| | - Jinyu Mo
- Shiyan Key Laboratory of Virology, Hubei University of Medicine, Shiyan 442000, PR China
| | - Yi Yao
- Department of Pediatrics, Taihe Hospital, Hubei University of Medicine, Shiyan, 442000, PR China
| | - Jian Li
- Shiyan Key Laboratory of Virology, Hubei University of Medicine, Shiyan 442000, PR China.
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A Rapid and Specific Genotyping Platform for Plasmodium falciparum Chloroquine Resistance via Allele-Specific PCR with a Lateral Flow Assay. Microbiol Spectr 2022; 10:e0271921. [PMID: 35416696 PMCID: PMC9045167 DOI: 10.1128/spectrum.02719-21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Single-nucleotide polymorphisms and genotyping related to genetic detection are several of the focuses of contemporary biotechnology development. Traditional methods are complex, take a long time, and rely on expensive instruments. Therefore, there is an urgent need for a rapid, simple, and accurate method convenient for use in resource-poor areas. Thus, a platform based on allele-specific PCR (AS-PCR) combined with a lateral flow assay (LFA) was developed, optimized, and used to detect the genotype of the Plasmodium falciparum chloroquine transporter gene (pfcrt). Subsequently, the system was assessed by clinical isolates and compared with Sanger sequencing. The sensitivity and specificity of the AS-PCR-LFA platform were 95.83% (115/120) and 100% (120/120), respectively, based on the clinical isolates. The detection limit of plasmid DNA was approximately 3.38 × 105 copies/μL. In addition, 100 parasites/μL were used for the dried filter blood spots from clinical isolates. The established rapid genotyping technique is not limited to antimalarial drug resistance genes but can also be applied to genetic diseases and other infectious diseases. Thus, it has realized the leap and transformation from scientific research theory to practical application and actively responds to the point-of-care testing policy. IMPORTANCE Accurate recognition of the mutation and genotype of genes are essential for the treatment of infectious diseases and genetic diseases. Based on the techniques of allele-specific PCR (AS-PCR) and a lateral flow assay (LFA), a rapid and useful platform for mutation detection was developed and assessed with clinical samples. It offers a powerful tool to identify antimalarial drug resistance and can support malaria control and elimination globally.
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Zhao H, Pi L, Zhao L, Qin Y, Zeng W, Xiang Z, Yang Q, Pan M, Li X, Zou C, Chen X, Zhao W, Lu Y, Wu Y, Duan M, Wang X, Li X, Mazier D, Huang Y, Yang Z. First Detection in West Africa of a Mutation That May Contribute to Artemisinin Resistance Plasmodium falciparum. Front Genet 2021; 12:701750. [PMID: 34691144 PMCID: PMC8531651 DOI: 10.3389/fgene.2021.701750] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2021] [Accepted: 08/31/2021] [Indexed: 11/16/2022] Open
Abstract
Background: The spread of drug resistance has seriously impacted the effective treatment of infection with the malaria parasite, Plasmodium falciparum. Continuous monitoring of molecular marker polymorphisms associated with drug resistance in parasites is essential for malaria control and elimination efforts. Our study describes mutations observed in the resistance genes Pfkelch13, Pfcrt, and Pfmdr1 in imported malaria and identifies additional potential drug resistance-associated molecular markers. Methods: Chinese patients infected in Africa with P. falciparum were treated with intravenous (IV) injections of artesunate 240–360 mg for 3–5 days while hospitalized and treated with oral dihydroartemisinin-piperaquine (DHP) for 3 days after hospital discharge. Blood samples were collected and PCR sequencing performed on genes Pfkelch13, Pfcrt, and Pfmdr1 from all isolates. Results: We analyzed a total of 225 patients from Guangxi, China with P. falciparum malaria acquired in Africa between 2016 and 2018. All patients were cured completely after treatment. The F446I mutation of the Pfkelch13 gene was detected for the first time from samples of West African P. falciparum, with a frequency of 1.0%. Five haplotypes of Pfcrt that encode residues 72–76 were found, with the wild-type CVMNK sequence predominating (80.8% of samples), suggesting that the parasites might be chloroquine sensitive. For Pfmdr1, N86Y (13.1%) and Y184F (58.8%) were the most prevalent, suggesting that artemether-lumefantrine may not, in general, be a suitable treatment for the group. Conclusions: For the first time, this study detected the F446I mutation of the Pfkelch13 gene from Africa parasites that lacked clinical evidence of resistance. This study provides the latest data for molecular marker surveillance related to antimalarial drug resistance genes Pfkelch13, Pfcrt, and Pfmdr1 imported from Africa, in Guangxi, China from Chinese migrate workers. Clinical Trial Registration: ChiCTROPC17013106.
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Affiliation(s)
- Hui Zhao
- Department of Pathogen Biology and Immunology, Kunming Medical University, Kunming, China
| | - Liang Pi
- Department of Pathogen Biology and Immunology, Kunming Medical University, Kunming, China
| | - Luyi Zhao
- Department of Pathogen Biology and Immunology, Kunming Medical University, Kunming, China
| | - Yucheng Qin
- Shanglin County People's Hospital, Guangxi, China
| | - Weilin Zeng
- Department of Pathogen Biology and Immunology, Kunming Medical University, Kunming, China
| | - Zheng Xiang
- Department of Pathogen Biology and Immunology, Kunming Medical University, Kunming, China
| | - Qi Yang
- Department of Pathogen Biology and Immunology, Kunming Medical University, Kunming, China
| | - Maohua Pan
- Shanglin County People's Hospital, Guangxi, China
| | - Xinxin Li
- Department of Pathogen Biology and Immunology, Kunming Medical University, Kunming, China
| | - Chunyan Zou
- Guangxi Zhuang Autonomous Region People's Hospital, Nanning, China
| | - Xi Chen
- Department of Pathogen Biology and Immunology, Kunming Medical University, Kunming, China
| | - Wei Zhao
- Department of Pathogen Biology and Immunology, Kunming Medical University, Kunming, China
| | - Yuxin Lu
- Shanglin County People's Hospital, Guangxi, China
| | - Yanrui Wu
- Department of Cell Biology & Genetics, Kunming Medical University, Kunming, China
| | - Mengxi Duan
- Department of Pathogen Biology and Immunology, Kunming Medical University, Kunming, China
| | - Xun Wang
- Department of Pathogen Biology and Immunology, Kunming Medical University, Kunming, China
| | - Xiaosong Li
- Department of Pathogen Biology and Immunology, Kunming Medical University, Kunming, China
| | - Dominique Mazier
- Sorbonne Université, INSERM, CNRS, Centre d'Immunologie et des Maladies Infectieuses, CIMI, Paris, France
| | - Yaming Huang
- Department of Pathogen Biology and Immunology, Kunming Medical University, Kunming, China.,Guangxi Zhuang Autonomous Region Center for Disease Prevention and Control, Nanning, China
| | - Zhaoqing Yang
- Department of Pathogen Biology and Immunology, Kunming Medical University, Kunming, China
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Cheng W, Song X, Tan H, Wu K, Li J. Molecular surveillance of anti-malarial resistance pfcrt, pfmdr1, and pfk13 polymorphisms in African Plasmodium falciparum imported parasites to Wuhan, China. Malar J 2021; 20:209. [PMID: 33933099 PMCID: PMC8087876 DOI: 10.1186/s12936-021-03737-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Accepted: 04/19/2021] [Indexed: 11/21/2022] Open
Abstract
Background Imported malaria parasites with anti-malarial drug resistance (ADR) from Africa is a serious public health challenge in non-malarial regions, including Wuhan, China. It is crucial to assess the ADR status in African Plasmodium falciparum isolates from imported malaria cases, as this will provide valuable information for rational medication and malaria control. Methods During 2017–2019, a cross-sectional study was carried out in Wuhan, China. Peripheral blood 3 ml of returned migrant workers from Africa was collected. The target fragments from pfcrt, pfmdr1, and k13 propeller (pfk13) genes were amplified, sequenced, and analysed. Results In total, 106 samples were collected. Subsequently, 98.11% (104/106), 100% (106/106), and 86.79% (92/106) of these samples were successfully amplified and sequenced for the pfcrt (72–76), pfmdr1, and pfk13 genes, respectively. The prevalence of the pfcrt 76 T, pfmdr1 86Y, and pfmdr1 184F mutations was 9.62, 4.72, and 47.17%, respectively. At codons 72–76, the pfcrt locus displayed three haplotypes, CVMNK (wild-type), CVIET (mutation type), CV M/I N/E K/T (mixed type), with 87.50%, 9.62%, and 2.88% prevalence, respectively. For the pfmdr1 gene, NY (wild type), NF and YF (mutant type), N Y/F, Y Y/F, and N/Y Y/F (mixed type) accounted for 34.91, 43.40, 3.77, 15.09, 0.94, and 1.89% of the haplotypes, respectively. A total of 83 isolates with six unique haplotypes were found in pfcrt and pfmdr1 combined haplotypes, of which NY-CVMNK and NF-CVMNK accounted for 40.96% (34/83) and 43.37% (36/83), respectively. Furthermore, 90 cases were successfully sequenced (84.91%, 90/106) at loci 93, 97, 101, and 145, and 78 cases were successfully sequenced (73.58%, 78/106) at loci 343, 353, and 356 for pfcrt. However, the mutation was observed only in locus 356 with 6.41%. For pfk13, mutations reported in Southeast Asia (at loci 474, 476, 493, 508, 527, 533, 537, 539, 543, 553, 568, 574, 578, and 580) and Africa (at loci 550, 561, 575, 579, and 589) were not observed. Conclusions The present data from pfcrt and pfmdr1 demonstrate that anti-malarial drugs including chloroquine, amodiaquine, and mefloquine, remain effective against malaria treatment in Africa. The new mutations in pfcrt related to piperaquine resistance remain at relatively low levels. Another source of concern is the artemether-lumefantrine resistance-related profiles of N86 and 184F of pfmdr1. Although no mutation in pfk13 is detected, molecular surveillance must continue. Supplementary Information The online version contains supplementary material available at 10.1186/s12936-021-03737-8.
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Affiliation(s)
- Weijia Cheng
- Department of Human Parasitology, School of Basic Medical Sciences, Hubei University of Medicine, Shiyan, 442000, China
| | - Xiaonan Song
- Department of Human Parasitology, School of Basic Medical Sciences, Hubei University of Medicine, Shiyan, 442000, China
| | - Huabing Tan
- Department of Infectious Diseases, Renmin Hospital, Hubei University of Medicine, Shiyan, 442000, China
| | - Kai Wu
- Department of Schistosomiasis and Endemic Diseases, Wuhan City Center for Disease Prevention and Control, Wuhan, 430024, China
| | - Jian Li
- Department of Human Parasitology, School of Basic Medical Sciences, Hubei University of Medicine, Shiyan, 442000, China. .,Department of Infectious Diseases, Renmin Hospital, Hubei University of Medicine, Shiyan, 442000, China.
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Multiple Single-Nucleotide Polymorphism Detection for Antimalarial Pyrimethamine Resistance via Allele-Specific PCR Coupled with Gold Nanoparticle-Based Lateral Flow Biosensor. Antimicrob Agents Chemother 2021; 65:AAC.01063-20. [PMID: 33361302 DOI: 10.1128/aac.01063-20] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2020] [Accepted: 12/17/2020] [Indexed: 11/20/2022] Open
Abstract
Molecular genotyping holds tremendous potential to detect antimalarial drug resistance (ADR) related to single nucleotide polymorphisms (SNPs). However, it relies on the use of complicated procedures and expensive instruments. Thus, rapid point-of-care testing (POCT) molecular tools are urgently needed for field survey and clinical use. Herein, a POCT platform consisting of multiple-allele-specific PCR (AS-PCR) and a gold nanoparticle (AuNP)-based lateral flow biosensor was designed and developed for SNP detection of the Plasmodium falciparum dihydrofolate reductase (pfdhfr) gene related to pyrimethamine resistance. The multiple-AS-PCR utilized 3' terminal artificial antepenultimate mismatch and double phosphorothioate-modified allele-specific primers. The duplex PCR amplicons with 5' terminal labeled with biotin and digoxin are recognized by streptavidin (SA)-AuNPs on the conjugate pad and then captured by anti-digoxin antibody through immunoreactions on the test line to produce a golden red line for detection. The system was applied to analyze SNPs in Pfdhfr N51I, C59R, and S108N of 98 clinical isolates from uncomplicated P. falciparum malaria patients. Compared with the results from nested PCR followed by Sanger DNA sequencing, the sensitivity was 97.96% (96/98) for N51I, C59R, and S108N. For specificity, the values were 100% (98/98), 95.92% (94/98), and 100% (98/98) for N51I, C59R, and S108N, respectively. The limit of detection is approximately 200 fg/μl for plasmid DNA as the template and 100 parasites/μl for blood filter paper. The established platform not only offers a powerful tool for molecular surveillance of ADR but also is easily extended to interrelated SNP profiles for infectious diseases and genetic diseases.
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Niba PTN, Nji AM, Evehe MS, Ali IM, Netongo PM, Ngwafor R, Moyeh MN, Ngum LN, Ndum OE, Acho FA, Mbu'u CM, Fosah DA, Atogho-Tiedeu B, Achonduh-Atijegbe O, Djokam-Dadjeu R, Chedjou JPK, Bigoga JD, Moukoko CEE, Ajua A, Achidi E, Tallah E, Leke RGF, Tourgordi A, Ringwald P, Alifrangis M, Mbacham WF. Drug resistance markers within an evolving efficacy of anti-malarial drugs in Cameroon: a systematic review and meta-analysis (1998-2020). Malar J 2021; 20:32. [PMID: 33422080 PMCID: PMC7796563 DOI: 10.1186/s12936-020-03543-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2020] [Accepted: 12/10/2020] [Indexed: 12/16/2022] Open
Abstract
BACKGROUND Malaria remains highly endemic in Cameroon. The rapid emergence and spread of drug resistance was responsible for the change from monotherapies to artemisinin-based combinations. This systematic review and meta-analysis aimed to determine the prevalence and distribution of Plasmodium falciparum drug resistance markers within an evolving efficacy of anti-malarial drugs in Cameroon from January 1998 to August 2020. METHODS The PRISMA-P and PRISMA statements were adopted in the inclusion of studies on single nucleotide polymorphisms (SNPs) of P. falciparum anti-malarial drug resistance genes (Pfcrt, Pfmdr1, Pfdhfr, Pfdhps, Pfatp6, Pfcytb and Pfk13). The heterogeneity of the included studies was evaluated using the Cochran's Q and I2 statistics. The random effects model was used as standard in the determination of heterogeneity between studies. RESULTS Out of the 902 records screened, 48 studies were included in this aggregated meta-analysis of molecular data. A total of 18,706 SNPs of the anti-malarial drug resistance genes were genotyped from 47,382 samples which yielded a pooled prevalence of 35.4% (95% CI 29.1-42.3%). Between 1998 and 2020, there was significant decline (P < 0.0001 for all) in key mutants including Pfcrt 76 T (79.9%-43.0%), Pfmdr1 86Y (82.7%-30.5%), Pfdhfr 51I (72.2%-66.9%), Pfdhfr 59R (76.5%-67.8%), Pfdhfr 108 N (80.8%-67.6%). The only exception was Pfdhps 437G which increased over time (30.4%-46.9%, P < 0.0001) and Pfdhps 540E that remained largely unchanged (0.0%-0.4%, P = 0.201). Exploring mutant haplotypes, the study observed a significant increase in the prevalence of Pfcrt CVIET mixed quintuple haplotype from 57.1% in 1998 to 57.9% in 2020 (P < 0.0001). In addition, within the same study period, there was no significant change in the triple Pfdhfr IRN mutant haplotype (66.2% to 67.3%, P = 0.427). The Pfk13 amino acid polymorphisms associated with artemisinin resistance were not detected. CONCLUSIONS This review reported an overall decline in the prevalence of P. falciparum gene mutations conferring resistance to 4-aminoquinolines and amino alcohols for a period over two decades. Resistance to artemisinins measured by the presence of SNPs in the Pfk13 gene does not seem to be a problem in Cameroon. Systematic review registration PROSPERO CRD42020162620.
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Affiliation(s)
- Peter Thelma Ngwa Niba
- MARCAD-DELTAS Programme, Laboratory for Public Health Research Biotechnologies, University of Yaoundé I, Yaoundé, Cameroon
- The Biotechnology Centre, University of Yaoundé I, Yaoundé, Cameroon
- Department of Biochemistry, Faculty of Science, University of Yaoundé I, Yaoundé, Cameroon
| | - Akindeh M Nji
- MARCAD-DELTAS Programme, Laboratory for Public Health Research Biotechnologies, University of Yaoundé I, Yaoundé, Cameroon
- The Biotechnology Centre, University of Yaoundé I, Yaoundé, Cameroon
- Department of Biochemistry, Faculty of Science, University of Yaoundé I, Yaoundé, Cameroon
| | - Marie-Solange Evehe
- The Biotechnology Centre, University of Yaoundé I, Yaoundé, Cameroon
- Department of Biochemistry, Faculty of Science, University of Yaoundé I, Yaoundé, Cameroon
| | - Innocent M Ali
- MARCAD-DELTAS Programme, Laboratory for Public Health Research Biotechnologies, University of Yaoundé I, Yaoundé, Cameroon
- The Biotechnology Centre, University of Yaoundé I, Yaoundé, Cameroon
- Department of Biochemistry, Faculty of Science, University of Dschang, Dschang, Cameroon
| | - Palmer Masumbe Netongo
- The Biotechnology Centre, University of Yaoundé I, Yaoundé, Cameroon
- Department of Biochemistry, Faculty of Science, University of Yaoundé I, Yaoundé, Cameroon
| | - Randolph Ngwafor
- The Biotechnology Centre, University of Yaoundé I, Yaoundé, Cameroon
- National Malaria Control Programme, Ministry of Public Health, Yaoundé, Cameroon
| | - Marcel N Moyeh
- MARCAD-DELTAS Programme, Laboratory for Public Health Research Biotechnologies, University of Yaoundé I, Yaoundé, Cameroon
- The Biotechnology Centre, University of Yaoundé I, Yaoundé, Cameroon
- Department of Biochemistry and Molecular Biology, Faculty of Science, University of Buea, Buea, Cameroon
| | - Lesley Ngum Ngum
- MARCAD-DELTAS Programme, Laboratory for Public Health Research Biotechnologies, University of Yaoundé I, Yaoundé, Cameroon
- The Biotechnology Centre, University of Yaoundé I, Yaoundé, Cameroon
- Department of Biochemistry, Faculty of Medicine and Biomedical Sciences, University of Yaoundé I, Yaoundé, Cameroon
- Institute of Medical Research and Medicinal Plant Studies, Ministry of Scientific Research and Innovation, Yaoundé, Cameroon
| | - Oliva Ebie Ndum
- The Biotechnology Centre, University of Yaoundé I, Yaoundé, Cameroon
- Université Des Montagnes, Banganté, West Region, Cameroon
| | - Fon Abongwa Acho
- The Biotechnology Centre, University of Yaoundé I, Yaoundé, Cameroon
| | - Cyrille Mbanwi Mbu'u
- The Biotechnology Centre, University of Yaoundé I, Yaoundé, Cameroon
- Department of Microbiology, Faculty of Science, University of Yaoundé I, Yaoundé, Cameroon
| | - Dorothy A Fosah
- National Malaria Control Programme, Ministry of Public Health, Yaoundé, Cameroon
| | - Barbara Atogho-Tiedeu
- The Biotechnology Centre, University of Yaoundé I, Yaoundé, Cameroon
- Department of Biochemistry, Faculty of Science, University of Yaoundé I, Yaoundé, Cameroon
| | | | - Rosine Djokam-Dadjeu
- The Biotechnology Centre, University of Yaoundé I, Yaoundé, Cameroon
- Department of Biochemistry, Faculty of Science, University of Yaoundé I, Yaoundé, Cameroon
| | - Jean Paul Kengne Chedjou
- MARCAD-DELTAS Programme, Laboratory for Public Health Research Biotechnologies, University of Yaoundé I, Yaoundé, Cameroon
- The Biotechnology Centre, University of Yaoundé I, Yaoundé, Cameroon
- Department of Biochemistry, Faculty of Science, University of Yaoundé I, Yaoundé, Cameroon
| | - Jude D Bigoga
- MARCAD-DELTAS Programme, Laboratory for Public Health Research Biotechnologies, University of Yaoundé I, Yaoundé, Cameroon
- The Biotechnology Centre, University of Yaoundé I, Yaoundé, Cameroon
- Department of Biochemistry, Faculty of Science, University of Yaoundé I, Yaoundé, Cameroon
| | - Carole Else Eboumbou Moukoko
- Faculty of Medicine and Pharmaceutical Sciences, University of Douala, Douala, Cameroon
- Malaria Research Service, Centre Pasteur Cameroon, Yaoundé, Cameroon
| | - Anthony Ajua
- Department of Biochemistry and Molecular Biology, Faculty of Science, University of Buea, Buea, Cameroon
| | - Eric Achidi
- Department of Biochemistry and Molecular Biology, Faculty of Science, University of Buea, Buea, Cameroon
| | - Esther Tallah
- Malaria Consortium-Cameroon Coalition Against Malaria, Yaoundé, Cameroon
| | - Rose G F Leke
- MARCAD-DELTAS Programme, Laboratory for Public Health Research Biotechnologies, University of Yaoundé I, Yaoundé, Cameroon
- The Biotechnology Centre, University of Yaoundé I, Yaoundé, Cameroon
- Malaria Consortium-Cameroon Coalition Against Malaria, Yaoundé, Cameroon
| | - Alexis Tourgordi
- The Cameroon Office of the World Health Organization, Yaoundé, Cameroon
| | - Pascal Ringwald
- Global Malaria Programme, World Health Organization, Geneva, Switzerland
| | - Michael Alifrangis
- Centre for Medical Parasitology, Department of Immunology and Microbiology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
- Department of Infectious Diseases, Copenhagen University Hospital, Copenhagen, Denmark
| | - Wilfred F Mbacham
- MARCAD-DELTAS Programme, Laboratory for Public Health Research Biotechnologies, University of Yaoundé I, Yaoundé, Cameroon.
- The Biotechnology Centre, University of Yaoundé I, Yaoundé, Cameroon.
- Department of Biochemistry, Faculty of Science, University of Yaoundé I, Yaoundé, Cameroon.
- Malaria Consortium-Cameroon Coalition Against Malaria, Yaoundé, Cameroon.
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Jiang T, Cheng W, Yao Y, Tan H, Wu K, Li J. Molecular surveillance of anti-malarial resistance Pfdhfr and Pfdhps polymorphisms in African and Southeast Asia Plasmodium falciparum imported parasites to Wuhan, China. Malar J 2020; 19:434. [PMID: 33238987 PMCID: PMC7691106 DOI: 10.1186/s12936-020-03509-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Accepted: 11/19/2020] [Indexed: 01/02/2023] Open
Abstract
Background Anti-malarial drug resistance is a severe challenge for eventual control and global elimination of malaria. Resistance to sulfadoxine-pyrimethamine (SP) increases as mutations accumulate in the Pfdhfr and Pfdhps genes. This study aimed to assess the polymorphisms and prevalence of mutation in these genes in the Plasmodium falciparum infecting migrant workers returning to Wuhan, China. Methods Blood samples were collected for 9 years (2011–2019). Parasite genomic DNA was extracted from blood spots on filter paper. The mutations were evaluated by nested PCR and sequencing. The single-nucleotide polymorphisms (SNPs) and haplotypes of the Pfdhfr and Pfdhps genes were analysed. Results Pfdhfr codon 108 showed a 94.7% mutation rate, while for Pfdhps, the rate for codon 437 was 79.0%. In total, five unique haplotypes at the Pfdhfr locus and 11 haplotypes at the Pfdhps locus were found while the Pfdhfr-Pfdhps combined loci revealed 28 unique haplotypes. A triple mutant (IRNI) of Pfdhfr was the most prevalent haplotype (84.4%). For Pfdhps, a single mutant (SGKAA) and a double mutant (SGEAA) were detected at frequencies of 37.8 and 22.3%, respectively. Among the combined haplotypes, a quadruple mutant (IRNI-SGKAA) was the most common, with a 30.0% frequency, followed by a quintuplet mutant (IRNI-SGEAA) with a frequency of 20.4%. Conclusion The high prevalence and saturation of Pfdhfr haplotypes and the medium prevalence of Pfdhps haplotypes demonstrated in the present data will provide support for predicting the status and progression of antifolate resistance in malaria-endemic regions and imported malaria in nonendemic areas. Additional interventions to evaluate and prevent SP resistance should be continuously considered.
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Affiliation(s)
- Tingting Jiang
- Department of Human Parasitology, School of Basic Medical Sciences, Hubei University of Medicine, Shiyan, 442000, China.,Department of Infectious Diseases, Renmin Hospital, Hubei University of Medicine, Shiyan, 442000, China
| | - Weijia Cheng
- Department of Human Parasitology, School of Basic Medical Sciences, Hubei University of Medicine, Shiyan, 442000, China.,Department of Infectious Diseases, Renmin Hospital, Hubei University of Medicine, Shiyan, 442000, China
| | - Yi Yao
- Department of Human Parasitology, School of Basic Medical Sciences, Hubei University of Medicine, Shiyan, 442000, China.,Department of Infectious Diseases, Renmin Hospital, Hubei University of Medicine, Shiyan, 442000, China
| | - Huabing Tan
- Department of Human Parasitology, School of Basic Medical Sciences, Hubei University of Medicine, Shiyan, 442000, China.,Department of Infectious Diseases, Renmin Hospital, Hubei University of Medicine, Shiyan, 442000, China
| | - Kai Wu
- Department of Schistosomiasis and Endemic Diseases, Wuhan City Center for Disease Prevention and Control, Wuhan, 430015, China.
| | - Jian Li
- Department of Human Parasitology, School of Basic Medical Sciences, Hubei University of Medicine, Shiyan, 442000, China. .,Department of Infectious Diseases, Renmin Hospital, Hubei University of Medicine, Shiyan, 442000, China.
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Xia J, Wu D, Wu K, Zhu H, Sun L, Lin W, Li K, Zhang J, Wan L, Zhang H, Liu S. Epidemiology of Plasmodium falciparum Malaria and Risk Factors for Severe Disease in Hubei Province, China. Am J Trop Med Hyg 2020; 103:1534-1539. [PMID: 32700677 PMCID: PMC7543867 DOI: 10.4269/ajtmh.20-0299] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2020] [Accepted: 06/17/2020] [Indexed: 11/07/2022] Open
Abstract
This study aimed to describe the epidemiology of Plasmodium falciparum malaria and identify risk factors for severe disease in Hubei Province, China, using a case-based survey of retrospective data from 2013 to 2018. From 2013 to 2018, a total of 763 imported malaria cases were reported in Hubei Province; 69.2% (528/763) cases were caused by P. falciparum species. The proportion of malaria caused by P. falciparum increased from 66.7% in 2013 to 74.0% in 2018 (χ2 = 21.378, P < 0.05). Plasmodium falciparum malaria was reported in 77 counties of Hubei Province. The majority of imported P. falciparum cases originated from Africa (98.9%, 522/528); 9.7% (51/528) of patients infected with P. falciparum developed severe malaria. Three deaths (case fatality rate: 0.6%) were related to imported P. falciparum malaria. Risk factors for severe malaria were being female (odds ratio [OR] = 3.593, 95% CI: 1.003-12.874), age ≥ 50 years (OR = 2.674, 95% CI: 1.269-5.634), > 3 days between symptom onset and diagnosis (OR = 2.383, 95% CI: 1.210-4.693), and the first-visit medical institution at the township level or lower (OR = 2.568, 95% CI: 1.344-4.908). Malaria prevention should be undertaken among high-risk groups, infection with P. falciparum should be detected early to prevent severe disease and death, and healthcare providers in health facilities at the township level should be trained on early recognition of malaria.
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Affiliation(s)
- Jing Xia
- Institute of Schistosomiasis Control, Hubei Provincial Center for Disease Control and Prevention, Wuhan, China
| | - Dongni Wu
- Institute of Schistosomiasis Control, Hubei Provincial Center for Disease Control and Prevention, Wuhan, China
| | - Kai Wu
- Department of Schistosomiasis and Endemic Diseases, Wuhan City Center for Disease Prevention and Control, Wuhan, China
| | - Hong Zhu
- Institute of Schistosomiasis Control, Hubei Provincial Center for Disease Control and Prevention, Wuhan, China
| | - Lingcong Sun
- Institute of Schistosomiasis Control, Hubei Provincial Center for Disease Control and Prevention, Wuhan, China
| | - Wen Lin
- Institute of Schistosomiasis Control, Hubei Provincial Center for Disease Control and Prevention, Wuhan, China
| | - Kaijie Li
- Institute of Schistosomiasis Control, Hubei Provincial Center for Disease Control and Prevention, Wuhan, China
| | - Juan Zhang
- Institute of Schistosomiasis Control, Hubei Provincial Center for Disease Control and Prevention, Wuhan, China
| | - Lun Wan
- Institute of Schistosomiasis Control, Hubei Provincial Center for Disease Control and Prevention, Wuhan, China
| | - Huaxun Zhang
- Institute of Schistosomiasis Control, Hubei Provincial Center for Disease Control and Prevention, Wuhan, China
| | - Si Liu
- Institute of Schistosomiasis Control, Hubei Provincial Center for Disease Control and Prevention, Wuhan, China
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Xie Y, Wu K, Cheng W, Jiang T, Yao Y, Xu M, Yang Y, Tan H, Li J. Molecular epidemiological surveillance of Africa and Asia imported malaria in Wuhan, Central China: comparison of diagnostic tools during 2011-2018. Malar J 2020; 19:321. [PMID: 32883296 PMCID: PMC7470674 DOI: 10.1186/s12936-020-03387-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2020] [Accepted: 08/25/2020] [Indexed: 01/17/2023] Open
Abstract
Background Malaria remains a serious public health problem globally. As the elimination of indigenous malaria continues in China, imported malaria has gradually become a major health hazard. Well-timed and accurate diagnoses could support the timely implementation of therapeutic schedules, reveal the prevalence of imported malaria and avoid transmission of the disease. Methods Blood samples were collected in Wuhan, China, from August 2011 to December 2018. All patients accepted microscopy and rapid diagnosis test (RDT) examinations. Subsequently, each of the positive or suspected positive cases was tested for four human-infectious Plasmodium species by using 18S rRNA-based nested PCR and Taqman probe-based real-time PCR. The results of the microscopy and the two molecular diagnostic methods were analysed. Importation origins were traced by country, and the prevalence of Plasmodium species was analysed by year. Results A total of 296 blood samples, including 288 that were microscopy and RDT positive, 7 RDT and Plasmodium falciparum positive, and 1 suspected case, were collected and reanalysed. After application of the two molecular methods and sequencing, 291 cases including 245 P. falciparum, 15 Plasmodium vivax, 20 Plasmodium ovale, 6 Plasmodium malariae and 5 mixed infections (3 P. falciparum + P. ovale, 2 P. vivax + P. ovale) were confirmed. These patients had returned from Africa (95.53%) and Asia (4.47%). Although the prevalence displayed a small-scale fluctuation, the overall trend of the imported cases increased yearly. Conclusions These results emphasize the necessity of combined utilization of the four tools for malaria diagnosis in clinic and in field surveys of potential risk regions worldwide including Wuhan.
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Affiliation(s)
- Yiting Xie
- Department of Human Parasitology, School of Basic Medical Sciences, Hubei University of Medicine, Shiyan, 442000, People's Republic of China.,Department of Infectious Diseases, Renmin Hospital, Hubei University of Medicine, Shiyan, 442000, People's Republic of China
| | - Kai Wu
- Department of Schistosomiasis and Endemic Diseases, Wuhan City Center for Disease Prevention and Control, Wuhan, 430015, People's Republic of China
| | - Weijia Cheng
- Department of Human Parasitology, School of Basic Medical Sciences, Hubei University of Medicine, Shiyan, 442000, People's Republic of China.,Department of Infectious Diseases, Renmin Hospital, Hubei University of Medicine, Shiyan, 442000, People's Republic of China
| | - Tingting Jiang
- Department of Human Parasitology, School of Basic Medical Sciences, Hubei University of Medicine, Shiyan, 442000, People's Republic of China.,Department of Infectious Diseases, Renmin Hospital, Hubei University of Medicine, Shiyan, 442000, People's Republic of China
| | - Yi Yao
- Department of Human Parasitology, School of Basic Medical Sciences, Hubei University of Medicine, Shiyan, 442000, People's Republic of China.,Department of Infectious Diseases, Renmin Hospital, Hubei University of Medicine, Shiyan, 442000, People's Republic of China
| | - Mingxing Xu
- Department of Schistosomiasis and Endemic Diseases, Wuhan City Center for Disease Prevention and Control, Wuhan, 430015, People's Republic of China
| | - Yan Yang
- Department of Schistosomiasis and Endemic Diseases, Wuhan City Center for Disease Prevention and Control, Wuhan, 430015, People's Republic of China
| | - Huabing Tan
- Department of Human Parasitology, School of Basic Medical Sciences, Hubei University of Medicine, Shiyan, 442000, People's Republic of China.,Department of Infectious Diseases, Renmin Hospital, Hubei University of Medicine, Shiyan, 442000, People's Republic of China
| | - Jian Li
- Department of Human Parasitology, School of Basic Medical Sciences, Hubei University of Medicine, Shiyan, 442000, People's Republic of China. .,Department of Infectious Diseases, Renmin Hospital, Hubei University of Medicine, Shiyan, 442000, People's Republic of China.
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Lin LY, Li J, Huang HY, Liang XY, Jiang TT, Chen JT, Ehapo CS, Eyi UM, Zheng YZ, Zha GC, Xie DD, Wang YL, Chen WZ, Liu XZ, Lin M. Trends in Molecular Markers Associated with Resistance to Sulfadoxine-Pyrimethamine (SP) Among Plasmodium falciparum Isolates on Bioko Island, Equatorial Guinea: 2011-2017. Infect Drug Resist 2020; 13:1203-1212. [PMID: 32431521 PMCID: PMC7197940 DOI: 10.2147/idr.s236898] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2019] [Accepted: 03/19/2020] [Indexed: 02/05/2023] Open
Abstract
PURPOSE Antimalarial drug resistance is one of the major challenges in global efforts to control and eliminate malaria. In 2006, sulfadoxine-pyrimethamine (SP) replaced with artemisinin-based combination therapy (ACT) on Bioko Island, Equatorial Guinea, in response to increasing SP resistance, which is associated with mutations in the dihydrofolate reductase (Pfdhfr) and dihydropteroate synthase (Pfdhps) genes. PATIENTS AND METHODS To evaluate the trend of molecular markers associated with SP resistance on Bioko Island from 2011 to 2017, 179 samples collected during active case detection were analysed by PCR and DNA sequencing. RESULTS Pfdhfr and Pfdhps gene sequences were obtained for 90.5% (162/179) and 77.1% (138/179) of the samples, respectively. For Pfdhfr, 97.5% (158/162), 95.7% (155/162) and 98.1% (159/162) of the samples contained N51I, C59R and S108N mutant alleles, respectively. And Pfdhps S436A, A437G, K540E, A581G, and A613S mutations were observed in 25.4% (35/138), 88.4% (122/138), 5.1% (7/138), 1.4% (2/138), and 7.2% (10/138) of the samples, respectively. Two classes of previously described Pfdhfr-Pfdhps haplotypes associated with SP resistance and their frequencies were identified: partial (IRNI-SGKAA, 59.4%) and full (IRNI-SGEAA, 5.5%) resistance. Although no significant difference was observed in different time periods (p>0.05), our study confirmed a slowly increasing trend of the frequencies of these SP-resistance markers in Bioko parasites over the 7 years investigated. CONCLUSION The findings reveal the general existence of SP-resistance markers on Bioko Island even after the replacement of SP as a first-line treatment for uncomplicated malaria. Continuous molecular monitoring and additional control efforts in the region are urgently needed.
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Affiliation(s)
- Li-Yun Lin
- School of Food Engineering and Biotechnology, Hanshan Normal University, Chaozhou, Guangdong Province, People’s Republic of China
- University of Chinese Academy of Sciences, Beijing, People’s Republic of China
- CAS Key Laboratory of Tropical Marine Bio-Resources and Ecology, Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, People’s Republic of China
| | - Jian Li
- Department of Human Parasitology, School of Basic Medical Sciences; Department of Infectious Diseases, Renmin Hospital, Hubei University of Medicine, Shiyan, Hubei Province, People’s Republic of China
| | - Hui-Ying Huang
- Department of Medical Laboratory, Chaozhou People’s Hospital Affiliated to Shantou University Medical College, Chaozhou, Guangdong Province, People’s Republic of China
- Department of Medical Genetics, Shantou University Medical College, Shantou, Guangdong Province, People’s Republic of China
| | - Xue-Yan Liang
- Department of Medical Laboratory, Chaozhou People’s Hospital Affiliated to Shantou University Medical College, Chaozhou, Guangdong Province, People’s Republic of China
- Department of Medical Genetics, Shantou University Medical College, Shantou, Guangdong Province, People’s Republic of China
| | - Ting-Ting Jiang
- Department of Human Parasitology, School of Basic Medical Sciences; Department of Infectious Diseases, Renmin Hospital, Hubei University of Medicine, Shiyan, Hubei Province, People’s Republic of China
| | - Jiang-Tao Chen
- The Chinese Medical Aid Team to the Republic of Equatorial Guinea, Guangzhou, Guangdong Province, People’s Republic of China
- Department of Medical Laboratory, Huizhou Central Hospital, Huizhou, Guangdong Province, People’s Republic of China
| | - Carlos Salas Ehapo
- Department of Medical Laboratory, Malabo Regional Hospital, Malabo, Equatorial Guinea
| | - Urbano Monsuy Eyi
- Department of Medical Laboratory, Malabo Regional Hospital, Malabo, Equatorial Guinea
| | - Yu-Zhong Zheng
- School of Food Engineering and Biotechnology, Hanshan Normal University, Chaozhou, Guangdong Province, People’s Republic of China
| | - Guang-Cai Zha
- School of Food Engineering and Biotechnology, Hanshan Normal University, Chaozhou, Guangdong Province, People’s Republic of China
| | - Dong-De Xie
- The Chinese Medical Aid Team to the Republic of Equatorial Guinea, Guangzhou, Guangdong Province, People’s Republic of China
- Department of Medical Laboratory, Huizhou Central Hospital, Huizhou, Guangdong Province, People’s Republic of China
| | - Yu-Ling Wang
- The Chinese Medical Aid Team to the Republic of Equatorial Guinea, Guangzhou, Guangdong Province, People’s Republic of China
- Department of Medical Laboratory, Huizhou Central Hospital, Huizhou, Guangdong Province, People’s Republic of China
| | - Wei-Zhong Chen
- Department of Medical Laboratory, Chaozhou People’s Hospital Affiliated to Shantou University Medical College, Chaozhou, Guangdong Province, People’s Republic of China
- Department of Medical Genetics, Shantou University Medical College, Shantou, Guangdong Province, People’s Republic of China
| | - Xiang-Zhi Liu
- Department of Medical Laboratory, Chaozhou People’s Hospital Affiliated to Shantou University Medical College, Chaozhou, Guangdong Province, People’s Republic of China
- Department of Medical Genetics, Shantou University Medical College, Shantou, Guangdong Province, People’s Republic of China
| | - Min Lin
- School of Food Engineering and Biotechnology, Hanshan Normal University, Chaozhou, Guangdong Province, People’s Republic of China
- Department of Medical Laboratory, Chaozhou People’s Hospital Affiliated to Shantou University Medical College, Chaozhou, Guangdong Province, People’s Republic of China
- Department of Medical Genetics, Shantou University Medical College, Shantou, Guangdong Province, People’s Republic of China
- Correspondence: Min Lin School of Food Engineering and Biotechnology, Hanshan Normal University, Chaozhou, Guangdong Province, People’s Republic of China Tel/Fax +86 768-2317422 Email
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The Diversity of the Plasmodium falciparum K13 Propeller Domain Did Not Increase after Implementation of Artemisinin-Based Combination Therapy in Uganda. Antimicrob Agents Chemother 2019; 63:AAC.01234-19. [PMID: 31358588 DOI: 10.1128/aac.01234-19] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2019] [Accepted: 07/08/2019] [Indexed: 12/15/2022] Open
Abstract
Artemisinin-based combination therapies (ACTs) are the standard of care to treat uncomplicated falciparum malaria. However, resistance to artemisinins, defined as delayed parasite clearance after therapy, has emerged in Southeast Asia, and the spread of resistance to sub-Saharan Africa could have devastating consequences. Artemisinin resistance has been associated in Southeast Asia with multiple nonsynonymous single nucleotide polymorphisms (NS-SNPs) in the propeller domain of the gene encoding the Plasmodium falciparum K13 protein (K13PD). Some K13PD NS-SNPs have been seen in Africa, but the relevance of these mutations is unclear. To assess whether ACT use has selected for specific K13PD mutations, we compared the K13PD genetic diversity in clinical isolates collected before and after the implementation of ACT use from seven sites across Uganda. We detected K13PD NS-SNPs in 16 of 683 (2.3%) clinical isolates collected between 1999 and 2004 and in 26 of 716 (3.6%) isolates collected between 2012 and 2016 (P = 0.16), representing a total of 29 different polymorphisms at 27 codons. Individual NS-SNPs were usually detected only once, and none were found in more than 0.7% of the isolates. Three SNPs (C469F, P574L, and A675V) associated with delayed clearance in Southeast Asia were seen in samples collected between 2012 and 2016, each in a single isolate. No differences in diversity following implementation of ACT use were found at any of the seven sites, nor was there evidence of selective pressures acting on the locus. Our results suggest that selection by ACTs is not impacting on K13PD diversity in Uganda.
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Eboumbou Moukoko CE, Huang F, Nsango SE, Kojom Foko LP, Ebong SB, Epee Eboumbou P, Yan H, Sitchueng L, Garke B, Ayong L. K-13 propeller gene polymorphisms isolated between 2014 and 2017 from Cameroonian Plasmodium falciparum malaria patients. PLoS One 2019; 14:e0221895. [PMID: 31479501 PMCID: PMC6719859 DOI: 10.1371/journal.pone.0221895] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2019] [Accepted: 08/16/2019] [Indexed: 12/23/2022] Open
Abstract
The emergence of artemisinin-resistant parasites since the late 2000s at the border of Cambodia and Thailand poses serious threats to malaria control globally, particularly in Africa which bears the highest malaria transmission burden. This study aimed to obtain reliable data on the current state of the kelch13 molecular marker for artemisinin resistance in Plasmodium falciparum in Cameroon. DNA was extracted from the dried blood spots collected from epidemiologically distinct endemic areas in the Center, Littoral and North regions of Cameroon. Nested PCR products from the Kelch13-propeller gene were sequenced and analyzed on an ABI 3730XL automatic sequencer. Of 219 dried blood spots, 175 were sequenced successfully. We identified six K13 mutations in 2.9% (5/175) of samples, including 2 non-synonymous, the V589I allele had been reported in Africa already and one new allele E612K had not been reported yet. These two non-synonymous mutations were uniquely found in parasites from the Littoral region. One sample showed two synonymous mutations within the kelch13 gene. We also observed two infected samples with mixed K13 mutant and K13 wild-type infection. Taken together, our data suggested the circulation of the non-synonymous K13 mutations in Cameroon. Albeit no mutations known to be associated with parasite clearance delays in the study population, there is need for continuous surveillance for earlier detection of resistance as long as ACTs are used and scaled up in the community.
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Affiliation(s)
- Carole Else Eboumbou Moukoko
- Biological Sciences Department, Faculty of Medicine and Pharmaceutical Sciences, University of Douala, Douala, Cameroon
- Malaria Research Unit, Centre Pasteur Cameroon, Yaoundé, Cameroon
- * E-mail: , (CEEM); (FH)
| | - Fang Huang
- Malarial Department, National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, Shanghai, China
- * E-mail: , (CEEM); (FH)
| | - Sandrine Eveline Nsango
- Biological Sciences Department, Faculty of Medicine and Pharmaceutical Sciences, University of Douala, Douala, Cameroon
- Malaria Research Unit, Centre Pasteur Cameroon, Yaoundé, Cameroon
| | - Loic Pradel Kojom Foko
- Parasitology and Entomology Research Unit, Department of Animal Organisms, Faculty of Science, University of Douala, Douala, Cameroon
| | - Serge Bruno Ebong
- Animal Organisms Biology and Physiology Department, Faculty of Sciences, University of Douala, Douala, Cameroon
| | | | - He Yan
- Malarial Department, National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, Shanghai, China
| | - Livia Sitchueng
- Malaria Research Unit, Centre Pasteur Cameroon, Yaoundé, Cameroon
| | - Bouba Garke
- Centre Pasteur Cameroon, Garoua Center, Yaoundé, Cameroon
| | - Lawrence Ayong
- Malaria Research Unit, Centre Pasteur Cameroon, Yaoundé, Cameroon
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Analysis of Plasmodium falciparum Na +/H + exchanger (pfnhe1) polymorphisms among imported African malaria parasites isolated in Wuhan, Central China. BMC Infect Dis 2019; 19:354. [PMID: 31035938 PMCID: PMC6489200 DOI: 10.1186/s12879-019-3921-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2018] [Accepted: 03/19/2019] [Indexed: 11/30/2022] Open
Abstract
Background Quinine (QN) remains an effective drug for malaria treatment. However, quinine resistance (QNR) in Plasmodium falciparum has been reported in many malaria-endemic regions particularly in African countries. Genetic polymorphism of the P. falciparum Na+/H+ exchanger (pfnhe1) is considered to influence QN susceptibility. Here, ms4760 alleles of pfnhe1 were analysed from imported African P. falciparum parasites isolated from returning travellers in Wuhan, Central China. Methods A total of 204 dried-blood spots were collected during 2011–2016. The polymorphisms of the pfnhe1 gene were determined using nested PCR with DNA sequencing. Results Sequences were generated for 99.51% (203/204) of the PCR products and 68.63% (140/204) of the isolates were analysed successfully for the pfnhe1 ms4760 haplotypes. In total, 28 distinct ms4760 alleles containing 0 to 5 DNNND and 1 to 3 NHNDNHNNDDD repeats were identified. For the alleles, ms4760–1 (22.86%, 32/140), ms4760–3 (17.86%, 25/140), and ms4760–7 (10.71%, 15/140) were the most prevalent profiles. Furthermore, 5 undescribed ms4760 alleles were reported. Conclusions The study offers an initial comprehensive analysis of pfnhe1 ms4760 polymorphisms from imported P. falciparum isolates in Wuhan. Pfnhe1 may constitute a good genetic marker to evaluate the prevalence of QNR in malaria-endemic and non-endemic regions.
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