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Wang T, Shen H, Xu B, Yang W, Chen S, Chen J. Genome Analysis of Plasmodium falciparum: A Preliminary Observation - Sierra Leone, 2022-2023. China CDC Wkly 2024; 6:368-373. [PMID: 38737823 PMCID: PMC11082561 DOI: 10.46234/ccdcw2024.071] [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] [Received: 03/12/2024] [Accepted: 04/21/2024] [Indexed: 05/14/2024] Open
Abstract
What is already known about this topic? Sierra Leone, with a gross domestic product (GDP) per capita below $300 and significant poverty, ranks among the world's least developed countries (LDCs). Despite its modest population of 8.6 million, the nation reports approximately 2.6 million malaria cases annually. Previously, there has been no reporting on the malaria genome data from this country. What is added by this report? In this study, we present the first reported whole-genome sequence analysis of 19 high parasite-density Plasmodium falciparum isolates from Sierra Leone, providing insights into the genomic epidemiology of this high-prevalence area. We found a high degree of relatedness among infections and substantial genetic diversity, consistent with the gradual reduction in overall case numbers. Moreover, our whole-genome analysis revealed that, beyond drug-resistance genes, gene families related to blood cell invasion, immune evasion, and others are undergoing directional selection. This suggests that the population in Sierra Leone has developed a relatively strong acquired immunity. What are the implications for public health practice? The genomic data not only facilitate the creation of single nucleotide polymorphism barcodes for case tracking but also enable the analysis of evolving transmission dynamics and selection pressures. Additionally, the samples from Sierra Leone exhibited higher selective pressures on resistance genes compared to those from Asia, a trend not commonly observed in other African samples. This suggests that less stringent healthcare systems and inconsistent treatment strategies can subject parasites to increased drug pressure, thereby accelerating the development of resistant strains.
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Affiliation(s)
- Tianyu Wang
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention (Chinese Center for Tropical Diseases Research); NHC Key Laboratory of Parasite and Vector Biology; WHO Collaborating Centre for Tropical Diseases; National Centre for International Research on Tropical Diseases, Shanghai, China
| | - Haimo Shen
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention (Chinese Center for Tropical Diseases Research); NHC Key Laboratory of Parasite and Vector Biology; WHO Collaborating Centre for Tropical Diseases; National Centre for International Research on Tropical Diseases, Shanghai, China
| | - Bin Xu
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention (Chinese Center for Tropical Diseases Research); NHC Key Laboratory of Parasite and Vector Biology; WHO Collaborating Centre for Tropical Diseases; National Centre for International Research on Tropical Diseases, Shanghai, China
| | - Wanxuan Yang
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention (Chinese Center for Tropical Diseases Research); NHC Key Laboratory of Parasite and Vector Biology; WHO Collaborating Centre for Tropical Diseases; National Centre for International Research on Tropical Diseases, Shanghai, China
- School of Basic Medical Sciences and Forensic Medicine, Hangzhou Medical College, Hangzhou City, Zhejiang Province, China
| | - Shenbo Chen
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention (Chinese Center for Tropical Diseases Research); NHC Key Laboratory of Parasite and Vector Biology; WHO Collaborating Centre for Tropical Diseases; National Centre for International Research on Tropical Diseases, Shanghai, China
| | - Junhu Chen
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention (Chinese Center for Tropical Diseases Research); NHC Key Laboratory of Parasite and Vector Biology; WHO Collaborating Centre for Tropical Diseases; National Centre for International Research on Tropical Diseases, Shanghai, China
- School of Basic Medical Sciences and Forensic Medicine, Hangzhou Medical College, Hangzhou City, Zhejiang Province, China
- School of Global Health, Chinese Centre for Tropical Diseases Research, Shanghai Jiao Tong University School of Medicine, Shanghai, China
- Hainan Tropical Diseases Research Center (Hainan Sub-Center, Chinese Center for Tropical Diseases Research), Haikou City, Hainan Province, China
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Nakajima KI, Inagaki T, Espera JM, Izumiya Y. Kaposi's sarcoma-associated herpesvirus (KSHV) LANA prevents KSHV episomes from degradation. J Virol 2024; 98:e0126823. [PMID: 38240588 PMCID: PMC10878079 DOI: 10.1128/jvi.01268-23] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2023] [Accepted: 12/14/2023] [Indexed: 02/21/2024] Open
Abstract
Protein knockdown with an inducible degradation system is a powerful tool for studying proteins of interest in living cells. Here, we adopted the auxin-inducible degron (AID) approach to detail Kaposi's sarcoma-associated herpesvirus (KSHV) latency-associated nuclear antigen (LANA) function in latency maintenance and inducible viral lytic gene expression. We fused the mini-auxin-inducible degron (mAID) tag at the LANA N-terminus with KSHV bacterial artificial chromosome 16 recombination, and iSLK cells were stably infected with the recombinant KSHV encoding mAID-LANA. Incubation with 5-phenyl-indole-3-acetic acid, a derivative of natural auxin, rapidly degraded LANA within 1.5 h. In contrast to our hypothesis, depletion of LANA alone did not trigger lytic reactivation but rather decreased inducible lytic gene expression when we stimulated reactivation with a combination of ORF50 protein expression and sodium butyrate. Decreased overall lytic gene induction seemed to be associated with a rapid loss of KSHV genomes in the absence of LANA. The rapid loss of viral genomic DNA was blocked by a lysosomal inhibitor, chloroquine. Furthermore, siRNA-mediated knockdown of cellular innate immune proteins, cyclic AMP-GMP synthase (cGAS) and simulator of interferon genes (STING), and other autophagy-related genes rescued the degradation of viral genomic DNA upon LANA depletion. Reduction of the viral genome was not observed in 293FT cells that lack the expression of cGAS. These results suggest that LANA actively prevents viral genomic DNA from sensing by cGAS-STING signaling axis, adding novel insights into the role of LANA in latent genome maintenance.IMPORTANCESensing of pathogens' components is a fundamental cellular immune response. Pathogens have therefore evolved strategies to evade such cellular immune responses. KSHV LANA is a multifunctional protein and plays an essential role in maintaining the latent infection by tethering viral genomic DNA to the host chromosome. We adopted the inducible protein knockdown approach and found that depletion of LANA induced rapid degradation of viral genomic DNA, which is mediated by innate immune DNA sensors and autophagy pathway. These observations suggest that LANA may play a role in hiding KSHV episome from innate immune DNA sensors. Our study thus provides new insights into the role of LANA in latency maintenance.
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Affiliation(s)
- Ken-ichi Nakajima
- Department of Dermatology, School of Medicine, University of California Davis, Sacramento, California, USA
| | - Tomoki Inagaki
- Department of Dermatology, School of Medicine, University of California Davis, Sacramento, California, USA
| | - Jonna Magdallene Espera
- Department of Dermatology, School of Medicine, University of California Davis, Sacramento, California, USA
| | - Yoshihiro Izumiya
- Department of Dermatology, School of Medicine, University of California Davis, Sacramento, California, USA
- Department of Biochemistry and Molecular Medicine, School of Medicine, University of California Davis, Sacramento, California, USA
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Vyas VK, Bhati S, Sharma M, Gehlot P, Patel N, Dalai S. 3D-QSAR-based design, synthesis and biological evaluation of 2,4-disubstituted quinoline derivatives as antimalarial agents. SAR AND QSAR IN ENVIRONMENTAL RESEARCH 2023; 34:639-659. [PMID: 37651746 DOI: 10.1080/1062936x.2023.2247326] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2023] [Accepted: 08/08/2023] [Indexed: 09/02/2023]
Abstract
2,4-Disubstituted quinoline derivatives were designed based on a 3D-QSAR study, synthesized and evaluated for antimalarial activity. A large dataset of 178 quinoline derivatives was used to perform a 3D-QSAR study using CoMFA and CoMSIA models. PLS analysis provided statistically validated results for CoMFA (r2ncv = 0.969, q2 = 0.677, r2cv = 0.682) and CoMSIA (r2ncv = 0.962, q2 = 0.741, r2cv = 0.683) models. Two series of a total of 40 2,4-disubstituted quinoline derivatives were designed with amide (quinoline-4-carboxamide) and secondary amine (4-aminoquinoline) linkers at the -C4 position of the quinoline ring. For the purpose of selecting better compounds for synthesis with good pEC50 values, activity prediction was carried out using CoMFA and CoMSIA models. Finally, a total of 10 2,4-disubstituted quinoline derivatives were synthesized, and screened for their antimalarial activity based on the reduction of parasitaemia. Compound #5 with amide linker and compound #19 with secondary amine linkers at the -C4 position of the quinoline ring showed maximum reductions of 64% and 57%, respectively, in the level of parasitaemia. In vivo screening assay confirmed and validated the findings of the 3D-QSAR study for the design of quinoline derivatives.
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Affiliation(s)
- V K Vyas
- Department of Pharmaceutical Chemistry, Institute of Pharmacy, Nirma University, Ahmedabad, India
| | - S Bhati
- Department of Pharmaceutical Chemistry, Institute of Pharmacy, Nirma University, Ahmedabad, India
| | - M Sharma
- Department of Pharmaceutical Chemistry, Institute of Pharmacy, Nirma University, Ahmedabad, India
| | - P Gehlot
- Department of Pharmaceutical Chemistry, Institute of Pharmacy, Nirma University, Ahmedabad, India
| | - N Patel
- Institute of Science, Nirma University, Ahmedabad, India
| | - S Dalai
- Institute of Science, Nirma University, Ahmedabad, India
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4
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Vyas VK, Shukla T, Sharma M. Medicinal chemistry approaches for the discovery of Plasmodium falciparum dihydroorotate dehydrogenase inhibitors as antimalarial agents. Future Med Chem 2023; 15:1295-1321. [PMID: 37551689 DOI: 10.4155/fmc-2023-0113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/09/2023] Open
Abstract
Malaria is a severe human disease and a global health problem because of drug-resistant strains. Drugs reported to prevent the growth of Plasmodium parasites target various phases of the parasites' life cycle. Antimalarial drugs can inhibit key enzymes that are responsible for the cellular growth and development of parasites. Plasmodium falciparum dihydroorotate dehydrogenase is one such enzyme that is necessary for de novo pyrimidine biosynthesis. This review focuses on various medicinal chemistry approaches used for the discovery and identification of selective P. falciparum dihydroorotate dehydrogenase inhibitors as antimalarial agents. This comprehensive review discusses recent advances in the selective therapeutic activity of distinct chemical classes of compounds as P. falciparum dihydroorotate dehydrogenase inhibitors and antimalarial drugs.
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Affiliation(s)
- Vivek K Vyas
- Department of Pharmaceutical Chemistry, Institute of Pharmacy, Nirma University, Ahmedabad, Gujarat, 382481, India
| | - Tanvi Shukla
- Department of Pharmaceutical Chemistry, Institute of Pharmacy, Nirma University, Ahmedabad, Gujarat, 382481, India
| | - Manmohan Sharma
- Department of Pharmaceutical Chemistry, Institute of Pharmacy, Nirma University, Ahmedabad, Gujarat, 382481, India
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Nasri E, Fakhim H, Salahi M, Ghafel S, Pourajam S, Darakhshandeh A, Kassaian N, Sadeghi S, Ataei B, Javanmard SH, Vaezi A. Efficacy of Hydroxychloroquine in Pre-exposure Severe Acute Respiratory Syndrome Coronavirus 2 Prophylaxis among High-Risk HealthCare Workers: A Multicenter Study. Adv Biomed Res 2023; 12:3. [PMID: 36926426 PMCID: PMC10012028 DOI: 10.4103/abr.abr_104_21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Revised: 09/10/2021] [Accepted: 10/04/2021] [Indexed: 02/05/2023] Open
Abstract
Background Prophylaxis could be an established strategy to potentially prevent and control infectious diseases and should be considered in the coronavirus disease 2019 (COVID-19) pandemic. The present study aimed to assess the effectiveness of hydroxychloroquine as a prophylaxis treatment strategy in the reduction of the risk of COVID-19 among health professionals. Materials and Methods The health professionals were randomly assigned (1:1) to the control group without receiving any hydroxychloroquine as prophylaxis and the hydroxychloroquine group receiving a weekly hydroxychloroquine dose of 400 mg up to 12 weeks. Results A total of 146 health professionals were randomly enrolled in this study between August 11 and November 11 in 2020. Among the screened health professionals, 21 (14.6%) were infected with COVID-19 during the 12 weeks, and 14 (66.6%) out of the 21 health professionals were in the control group. Most participants with COVID-19 had mild symptoms (62%). In addition, 9.5% (n = 2) of the participants suffered from moderate disease and 28.5% were diagnosed with severe symptoms. In the hydroxychloroquine group, 5 (7.1%) and 2 (2.8%) participants were reported with mild and moderate symptoms of COVID-19, respectively, and 2 participants had moderate, 8 (10.9%) participants had mild symptoms, and 6 (8.2%) participants had severe symptoms in the control group, within 3 months. Severe symptoms of COVID-19 were not observed in the hydroxychloroquine group. Conclusion This study addressed the effect and benefit of hydroxychloroquine administration for the prevention of COVID-19 among health professionals. The improved perception of prophylaxis might highlight its important role in future COVID-19 outbreaks to prevent hospital transmission, which is a major route of spread.
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Affiliation(s)
- Elahe Nasri
- Infectious Diseases and Tropical Medicine Research Center, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Hamed Fakhim
- Infectious Diseases and Tropical Medicine Research Center, Isfahan University of Medical Sciences, Isfahan, Iran.,Nosocomial Infection Research Center, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Mehrdad Salahi
- Infectious Diseases and Tropical Medicine Research Center, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Safiyeh Ghafel
- Infectious Diseases and Tropical Medicine Research Center, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Samane Pourajam
- Department of Internal Medicine, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Ali Darakhshandeh
- Department of Internal Medicine, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Nazila Kassaian
- Infectious Diseases and Tropical Medicine Research Center, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Somayeh Sadeghi
- Department of Internal Medicine, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Behrooz Ataei
- Nosocomial Infection Research Center, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Shaghayegh Haghjooy Javanmard
- Applied Physiology Research Center, Cardiovascular Research Institute, Isfahan University of Medical Science, Isfahan, Iran
| | - Afsane Vaezi
- Department of Medical Laboratory Science, School of Allied Medical Sciences, Iran University of Medical Sciences, Tehran, Iran
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Wang F, Song J, Yan Y, Zhou Q, Li X, Wang P, Yang Z, Zhang Q, Zhang H. Integrated Network Pharmacology Analysis and Serum Metabolomics to Reveal the Anti-malaria Mechanism of Artesunate. ACS OMEGA 2022; 7:31482-31494. [PMID: 36092633 PMCID: PMC9453802 DOI: 10.1021/acsomega.2c04157] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/02/2022] [Accepted: 08/15/2022] [Indexed: 06/15/2023]
Abstract
Artesunate is a widely used drug in clinical treatment of malaria. The aim of this study was to investigate the therapeutic mechanism of artesunate on malaria using an integrated strategy of network pharmacology and serum metabolomics. The mice models of malaria were established using 2 × 107 red blood cells infected with Plasmodium berghei ANKA injection. Giemsa and hematoxylin-eosin (HE) staining were used to evaluate the efficacy of artesunate on malaria. Next, network pharmacology analysis was applied to identify target genes. Then, a metabolomics strategy has been developed to find the possible significant serum metabolites and metabolic pathways induced by artesunate. Additionally, two parts of the results were integrated to confirm each other. Giemsa and HE staining results showed that artesunate significantly inhibited the proliferation of Plasmodium and reduced liver and spleen inflammation. Based on metabolomics, 18 differential endogenous metabolites were identified as potential biomarkers related to the artesunate for treating malaria. These metabolites were mainly involved in the relevant pathways of biosynthesis of unsaturated fatty acids; aminoacyl-tRNA biosynthesis; valine, leucine, and isoleucine biosynthesis; and phenylalanine, tyrosine, and tryptophan biosynthesis. The results of the network pharmacology analysis showed 125 potential target genes related to the treatment of malaria with artesunate. The functional enrichment was mainly associated with lipid and atherosclerosis; pathways of prostate cancer and proteoglycans in cancer; and PI3K-Akt, apoptosis, NF-κB, Th17 cell, and AGE-RAGE signaling pathways. These findings were partly consistent with the findings of the metabolism. Our results further suggested that artesunate could correct the inflammatory response caused by malaria through Th17 cell and NF-κB pathways. Meanwhile, our work revealed that cholesterol needed by Plasmodium berghei came directly from serum. Cholesterol and palmitic acid may be essential in the growth and reproduction of Plasmodium berghei. In summary, artesunate may have an effect on anti-malarial properties through multiple targets.
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Affiliation(s)
- Feiran Wang
- Shandong
University of Traditional Chinese Medicine, Jinan 250355, P. R. China
- Shandong
Academy of Chinese Medicine, Jinan 250014, P. R. China
| | - Jian Song
- Shandong
University of Traditional Chinese Medicine, Jinan 250355, P. R. China
| | - Yingying Yan
- Shandong
University of Traditional Chinese Medicine, Jinan 250355, P. R. China
| | - Qian Zhou
- Shandong
Academy of Chinese Medicine, Jinan 250014, P. R. China
| | - Xiaojing Li
- Shandong
Academy of Chinese Medicine, Jinan 250014, P. R. China
| | - Ping Wang
- Shandong
Academy of Chinese Medicine, Jinan 250014, P. R. China
| | - Zongtong Yang
- Shandong
Academy of Chinese Medicine, Jinan 250014, P. R. China
| | - Qiuhong Zhang
- Jinan
Center for Food and Drug Control, Jinan 250102, P. R. China
| | - Huimin Zhang
- Shandong
Academy of Chinese Medicine, Jinan 250014, P. R. China
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Kabi AK, Pal M, Gujjarappa R, Malakar CC, Roy M. Overview of Hydroxychloroquine and Remdesivir on severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). J Heterocycl Chem 2022; 60:JHET4541. [PMID: 35942205 PMCID: PMC9349740 DOI: 10.1002/jhet.4541] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2022] [Revised: 07/06/2022] [Accepted: 07/07/2022] [Indexed: 11/08/2022]
Abstract
The novel severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) caused the ongoing pandemic named COVID-19 which causes a serious emergency on public health hazards of international concern. In the face of a critical medical emergency, repositioning of drugs is one of the most authentic options to design an adequate treatment for infected patients immediately. In this strategy, Remdesivir (Veklury), Hydroxychloroquine appears to be the drug of choice and garnered unprecedented attention as potential therapeutic agents against the pandemic realized worldwide due to SARS-CoV-2 infection. These are the breathtaking instances of possible repositioning of drugs, whose pharmacokinetics and optimal dosage are familiar. In this review, we provide an overview of these medications, their synthesis, and the possible mechanism of action against SARS-CoV-2.
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Affiliation(s)
- Arup K. Kabi
- Department of ChemistryNational Institute of Technology ManipurImphalManipurIndia
| | - Maynak Pal
- Department of ChemistryNational Institute of Technology ManipurImphalManipurIndia
| | - Raghuram Gujjarappa
- Department of ChemistryNational Institute of Technology ManipurImphalManipurIndia
| | - Chandi C. Malakar
- Department of ChemistryNational Institute of Technology ManipurImphalManipurIndia
| | - Mithun Roy
- Department of ChemistryNational Institute of Technology ManipurImphalManipurIndia
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Singh Y, Raza H, Sharma SK, Bhat VK. Computing Basis and Dimension of Chloroquine and Hydroxychloroquine by Using Chemical Graph Theory. Polycycl Aromat Compd 2022. [DOI: 10.1080/10406638.2022.2086269] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Yogesh Singh
- School of Electronics and Communication Engineering, Shri Mata Vaishno Devi University, Katra, Jammu and Kashmir, India
| | - Hassan Raza
- School of Mathematical Sciences, College of Science and Technology, Wenzhou-Kean University, Wenzhou, China
| | - Sunny Kumar Sharma
- School of Mathematics, Shri Mata Vaishno Devi University, Katra, Jammu and Kashmir, India
| | - Vijay Kumar Bhat
- School of Mathematics, Shri Mata Vaishno Devi University, Katra, Jammu and Kashmir, India
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9
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Elaagip A, Absalon S, Florentin A. Apicoplast Dynamics During Plasmodium Cell Cycle. Front Cell Infect Microbiol 2022; 12:864819. [PMID: 35573785 PMCID: PMC9100674 DOI: 10.3389/fcimb.2022.864819] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2022] [Accepted: 03/11/2022] [Indexed: 11/21/2022] Open
Abstract
The deadly malaria parasite, Plasmodium falciparum, contains a unique subcellular organelle termed the apicoplast, which is a clinically-proven antimalarial drug target. The apicoplast is a plastid with essential metabolic functions that evolved via secondary endosymbiosis. As an ancient endosymbiont, the apicoplast retained its own genome and it must be inherited by daughter cells during cell division. During the asexual replication of P. falciparum inside human red blood cells, both the parasite, and the apicoplast inside it, undergo massive morphological changes, including DNA replication and division. The apicoplast is an integral part of the cell and thus its development is tightly synchronized with the cell cycle. At the same time, certain aspects of its dynamics are independent of nuclear division, representing a degree of autonomy in organelle biogenesis. Here, we review the different aspects of organelle dynamics during P. falciparum intraerythrocytic replication, summarize our current understanding of these processes, and describe the many open questions in this area of parasite basic cell biology.
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Affiliation(s)
- Arwa Elaagip
- Department of Parasitology and Medical Entomology, Faculty of Medical Laboratory Sciences, University of Khartoum, Khartoum, Sudan
| | - Sabrina Absalon
- Department of Pharmacology and Toxicology, Indiana University School of Medicine, Indianapolis, IN, United States
- *Correspondence: Sabrina Absalon, ; Anat Florentin,
| | - Anat Florentin
- The Kuvin Center for the Study of Infectious and Tropical Diseases, Department of Microbiology and Molecular Genetics, Institute for Medical Research Israel-Canada, Faculty of Medicine, Hebrew University of Jerusalem, Jerusalem, Israel
- *Correspondence: Sabrina Absalon, ; Anat Florentin,
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Impact of Infectious Disease on Humans and Our Origins. ANTHROPOLOGICAL REVIEW 2022. [DOI: 10.18778/1898-6773.85.1.07] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
On May 16, 2020, the Center for Academic Research and Training in Anthropogeny organized the symposium “Impact of Infectious Disease on Humans and Our Origins”. The symposium aimed to gather experts on infectious diseases in one place and discuss the interrelationship between different pathogens and humans in an evolutionary context. The talks discussed topics including SARS-CoV-2, dengue and Zika, the notion of human-specific diseases, streptococci, microbiome in the human reproductive tract, Salmonella enterica, malaria, and human immunological memory.
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Hai Y, Cai ZM, Li PJ, Wei MY, Wang CY, Gu YC, Shao CL. Trends of antimalarial marine natural products: progresses, challenges and opportunities. Nat Prod Rep 2022; 39:969-990. [DOI: 10.1039/d1np00075f] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
This review provides an overview of the antimalarial marine natural products, focusing on their chemistry, malaria-related targets and mechanisms, and highlighting their potential for drug development.
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Affiliation(s)
- Yang Hai
- Key Laboratory of Marine Drugs, The Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China, Qingdao, 266003, China
| | - Zi-Mu Cai
- Key Laboratory of Marine Drugs, The Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China, Qingdao, 266003, China
| | - Peng-Jie Li
- Key Laboratory of Marine Drugs, The Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China, Qingdao, 266003, China
| | - Mei-Yan Wei
- Key Laboratory of Marine Drugs, The Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China, Qingdao, 266003, China
- College of Food Science and Engineering, Ocean University of China, Qingdao, 266003, China
| | - Chang-Yun Wang
- Key Laboratory of Marine Drugs, The Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China, Qingdao, 266003, China
- Laboratory for Marine Drugs and Bioproducts, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao, 266237, China
| | - Yu-Cheng Gu
- Syngenta Jealott's Hill International Research Centre, Bracknell, Berkshire, RG42 6EY, UK
| | - Chang-Lun Shao
- Key Laboratory of Marine Drugs, The Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China, Qingdao, 266003, China
- Laboratory for Marine Drugs and Bioproducts, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao, 266237, China
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12
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Mandala WL, Harawa V, Dzinjalamala F, Tembo D. The role of different components of the immune system against Plasmodium falciparum malaria: Possible contribution towards malaria vaccine development. Mol Biochem Parasitol 2021; 246:111425. [PMID: 34666102 PMCID: PMC8655617 DOI: 10.1016/j.molbiopara.2021.111425] [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: 04/15/2021] [Revised: 08/10/2021] [Accepted: 10/08/2021] [Indexed: 12/24/2022]
Abstract
Plasmodium falciparum malaria still remains a major global public health challenge with over 220 million new cases and well over 400,000 deaths annually. Most of the deaths occur in sub-Saharan Africa which bears 90 % of the malaria cases. Such high P. falciparum malaria-related morbidity and mortality rates pose a huge burden on the health and economic wellbeing of the countries affected. Lately, substantial gains have been made in reducing malaria morbidity and mortality through intense malaria control initiatives such as use of effective antimalarials, intensive distribution and use of insecticide-treated nets (ITNs), and implementation of massive indoor residual spraying (IRS) campaigns. However, these gains are being threatened by widespread resistance of the parasite to antimalarials, and the vector to insecticides. Over the years the use of vaccines has proven to be the most reliable, cost-effective and efficient method for controlling the burden and spread of many infectious diseases, especially in resource poor settings with limited public health infrastructure. Nonetheless, this had not been the case with malaria until the most promising malaria vaccine candidate, RTS,S/AS01, was approved for pilot implementation programme in three African countries in 2015. This was regarded as the most important breakthrough in the fight against malaria. However, RTS,S/AS01 has been found to have some limitations, the main ones being low efficacy in certain age groups, poor immunogenicity and need for almost three boosters to attain a reasonable efficacy. Thus, the search for a more robust and effective malaria vaccine still continues and a better understanding of naturally acquired immune responses to the various stages, including the transmissible stages of the parasite, could be crucial in rational vaccine design. This review therefore compiles what is currently known about the basic biology of P. falciparum and the natural malaria immune response against malaria and progress made towards vaccine development.
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Affiliation(s)
- Wilson L Mandala
- Academy of Medical Sciences, Malawi University of Science and Technology, Thyolo, Malawi; Malawi Liverpool Wellcome Trust, Blantyre, Malawi.
| | | | - Fraction Dzinjalamala
- Academy of Medical Sciences, Malawi University of Science and Technology, Thyolo, Malawi
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Tajiri M. Phage Display Screening for Alba Superfamily Proteins from the Human Malaria Parasite, Plasmodium falciparum Reveals a High Level of Association with Protein Modification Pathways and Hints at New Drug Targets. Acta Parasitol 2021; 66:844-850. [PMID: 33559027 DOI: 10.1007/s11686-021-00339-x] [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: 07/02/2020] [Accepted: 01/19/2021] [Indexed: 11/25/2022]
Abstract
PURPOSE A 2016 study estimated that over 3 billion people are currently at risk of contracting malaria. Although a wide variety of medications are available to treat malaria, the parasites have started to exhibit resistance to many commonly used therapeutics necessitating a push for new investigations to identify novel drug targets. METHODS In this study, nucleic acid-binding Alba superfamily proteins of the human malaria parasite, Plasmodium falciparum were investigated to identify interacting protein motifs. A high-throughput molecular screening technique, phage display, coupled with next-generation sequencing was applied to assess large data sets. RESULTS Four P. falciparum Alba proteins were used for screening which appear to have distinct roles in parasite biology based on the results of this work. The majority of the peptide motifs identified from phage display were involved in post-translational modification pathways, thus suggesting that parasite-specific gene regulatory mechanisms are involved which could serve as drug targets for novel therapeutics. CONCLUSION This study found 18 peptide motifs which potentially have strong interactions with one or more of the Alba superfamily proteins from P. falciparum. Considering the large fraction of post-translational modification-related peptide motifs identified from this work, one or more of the protein modification pathways could serve as a good target for malaria treatment.
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Affiliation(s)
- Momoko Tajiri
- Department of Chemistry, Michigan Technological University, Houghton, MI, 49931-1295, USA.
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14
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Grygiel-Górniak B. Antimalarial drugs-are they beneficial in rheumatic and viral diseases?-considerations in COVID-19 pandemic. Clin Rheumatol 2021; 41:1-18. [PMID: 34218393 PMCID: PMC8254634 DOI: 10.1007/s10067-021-05805-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2021] [Revised: 05/25/2021] [Accepted: 05/30/2021] [Indexed: 02/06/2023]
Abstract
The majority of the medical fraternity is continuously involved in finding new therapeutic schemes, including antimalarial medications (AMDs), which can be useful in combating the 2019-nCoV: coronavirus disease (COVID-19). For many decades, AMDs have been widely used in the treatment of malaria and various other anti-inflammatory diseases, particularly to treat autoimmune disorders of the connective tissue. The review comprises in vitro and in vivo studies, original studies, clinical trials, and consensus reports for the analysis, which were available in medical databases (e.g., PubMed). This manuscript summarizes the current knowledge about chloroquine (CQ)/hydroxychloroquine (HCQ) and shows the difference between their use, activity, recommendation, doses, and adverse effects on two groups of patients: those with rheumatic and viral diseases (including COVID-19). In the case of connective tissue disorders, AMDs are prescribed for a prolonged duration in small doses, and their effect is observed after few weeks, whereas in the case of viral infections, they are prescribed in larger doses for a short duration to achieve a quick saturation effect. In rheumatic diseases, AMDs are well tolerated, and their side effects are rare. However, in some viral diseases, the effect of AMDs is questionable or not so noticeable as suggested during the initial prognosis. They are mainly used as an additive therapy to antiviral drugs, but recent studies have shown that AMDs can diminish the efficacy of some antiviral drugs and may cause respiratory, kidney, liver, and cardiac complications.
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Affiliation(s)
- Bogna Grygiel-Górniak
- Department of Rheumatology, Rehabilitation and Internal Medicine, Poznan University of Medical Sciences, Poznan, Poland.
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15
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Singh YD, Ningthoujam R, Panda MK, Jena B, Babu PJ, Mishra AK. Insight from nanomaterials and nanotechnology towards COVID-19. SENSORS INTERNATIONAL 2021; 2:100099. [PMID: 34766056 PMCID: PMC8117484 DOI: 10.1016/j.sintl.2021.100099] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/11/2021] [Revised: 05/01/2021] [Accepted: 05/01/2021] [Indexed: 12/24/2022] Open
Abstract
The pandemic coronavirus disease 2019 (COVID-19) becomes one of the most dreadful disease in the history of mankind in the entire world. The covid-19 outbreak started from Wuhan city of China and then rapidly transmitted throughout the world causing mass destruction and seldom. This sporadical disease has taken many lives due to sudden outbreak and no particular vaccines were available at the early wave. All the vaccines developed are mostly targeted to spike protein of the virus which involves the encapsulation of mRNA and nanoparticles. Nanotechnology intervention in fighting against the covid-19 is one way to tackle the disease from different angles including nano coating mask, nano diagnostic kits, nano sanitizer, and nano medicine. This article highlights the intervention of nanotechnology and its possible treatment against the covid-19. It is high time to come together all the units of material science and biological science to fight against the dreadful COVID-19. As an alternative strategy, a multidisciplinary research effort, consisting of classical epidemiology and clinical methodologies, drugs and nanotechnology, engineering science and biological apprehension, can be adopted for developing improved drugs exhibiting antiviral activities. The employment of nanotechnology and its allied fields can be explored to detect, treat, and prevent the covid-19 disease.
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Affiliation(s)
- Yengkhom Disco Singh
- Biomaterials and Bioprocessing Research Laboratory, Department of Post-Harvest Technology, College of Horticulture and Forestry, Central Agricultural University, Pasighat, 791102, Arunachal Pradesh, India
| | - Rina Ningthoujam
- Department of Vegetable Science, College of Horticulture and Forestry, Central Agricultural University, Pasighat, Arunachal Pradesh, 791102, India
| | - Manasa Kumar Panda
- Environment & Sustainability Department, CSIR- Institute of Minerals and Materials Technology, Bhubaneswar, 751013, India
| | - Barsarani Jena
- Department of Botany, School of Applied Sciences, Centurion University of Technology and Management, Bhubaneswar, 752050, Odisha, India
| | - Punuri Jayasekhar Babu
- Biomaterials and Bioengineering Research Laboratory, Department of Biotechnology, Mizoram University, Pachhunga University College Campus, Aizawl, 796001, Mizoram , India
| | - Avanindra Kumar Mishra
- Deputy Director of Research, Central Agricultural University, Imphal, 7 95004, Manipur, India
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16
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Lem FF, Opook F, Lee DJH, Chee FT, Lawson FP, Chin SN. Molecular Mechanism of Action of Repurposed Drugs and Traditional Chinese Medicine Used for the Treatment of Patients Infected With COVID-19: A Systematic Scoping Review. Front Pharmacol 2021; 11:585331. [PMID: 33746739 PMCID: PMC7970521 DOI: 10.3389/fphar.2020.585331] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2020] [Accepted: 12/21/2020] [Indexed: 12/15/2022] Open
Abstract
Background: The emergence of COVID-19 as a pandemic has resulted in the need for urgent development of vaccines and drugs and the conduction of clinical trials to fight the outbreak. Because of the time constraints associated with the development of vaccines and effective drugs, drug repurposing and other alternative treatment methods have been used to treat patients that have been infected by the SARS-CoV-2 virus and have acquired COVID-19. Objective: The objective of this systematic scoping review is to provide an overview of the molecular mechanism of action of repurposed drugs or alternative treatment medicines used to attenuate COVID-19 disease. Method: The research articles or gray literature, including theses, government reports, and official news online, were identified from four databases and one search engine. The full content of a total of 160 articles that fulfilled our inclusion criteria was analyzed and information about six drugs (ritonavir, lopinavir, oseltamivir, remdesivir, favipiravir, and chloroquine) and four Traditional Chinese Medicines (Shuang Huang Lian Kou Fu Ye, TCM combination of Bu Huan Jin Zheng Qi San and Da Yuan Yin, Xue Bi Jing Injection, and Qing Fei Pai Du Tang) was extracted. Results: All of the repurposed drugs and complementary medicine that have been used for the treatment of COVID-19 depend on the ability of the drug to inhibit the proliferation of the SARS-CoV-2 virus by binding to enzyme active sites, viral chain termination, or triggering of the molecular pathway, whereas Traditional Chinese Medicine plays a pivotal role in triggering the inflammation pathway, such as the neuraminidase blocker, to fight the SARS-CoV-2 virus.
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Affiliation(s)
- Fui Fui Lem
- Clinical Research Centre, Hospital Queen Elizabeth, Ministry of Health Malaysia, Kota Kinabalu, Malaysia
| | - Fernandes Opook
- Wildlife Health, Genetic and Forensic Laboratory, Kota Kinabalu, Malaysia
| | | | - Fong Tyng Chee
- Faculty of Sustainable Agriculture, Universiti Malaysia Sabah, Sandakan, Malaysia
| | - Fahcina P. Lawson
- School of Medicine, The Johns Hopkins University, Baltimore, MD, United States
| | - Su Na Chin
- Faculty of Science and Natural Resources, Universiti Malaysia Sabah, Kota Kinabalu, Malaysia
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17
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Gasmi A, Peana M, Noor S, Lysiuk R, Menzel A, Gasmi Benahmed A, Bjørklund G. Chloroquine and hydroxychloroquine in the treatment of COVID-19: the never-ending story. Appl Microbiol Biotechnol 2021; 105:1333-1343. [PMID: 33515285 PMCID: PMC7847229 DOI: 10.1007/s00253-021-11094-4] [Citation(s) in RCA: 52] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2020] [Revised: 12/23/2020] [Accepted: 01/03/2021] [Indexed: 02/06/2023]
Abstract
Abstract The anti-malarial drugs chloroquine (CQ) and hydroxychloroquine (HCQ) have been suggested as promising agents against the new coronavirus SARS-CoV-2 that induces COVID-19 and as a possible therapy for shortening the duration of the viral disease. The antiviral effects of CQ and HCQ have been demonstrated in vitro due to their ability to block viruses like coronavirus SARS in cell culture. CQ and HCQ have been proposed to reduce immune reactions to infectious agents, inhibit pneumonia exacerbation, and improve lung imaging investigations. CQ analogs have also revealed the anti-inflammatory and immunomodulatory effects in treating viral infections and related ailments. There was, moreover, convincing evidence from early trials in China about the efficacy of CQ and HCQ in the anti-COVID-19 procedure. Since then, research and studies have been massive to ascertain these drugs’ efficacy and safety in treating the viral disease. In the present review, we construct a synopsis of the main properties and current data concerning the metabolism of CQ/HCQ, which were the basis of assessing their potential therapeutic roles against the new coronavirus infection. The effective role of QC and HCQ in the prophylaxis and therapy of COVID-19 infection is discussed in light of the latest international medical-scientific research results. Key points • Data concerning metabolism and properties of CQ/HCQ are discussed. • The efficacy of CQ/HCQ against COVID-19 has been the subject of contradictory results. • CQ/HCQ has little or no effect in reducing mortality in SARS-CoV-2-affected patients.
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Affiliation(s)
- Amin Gasmi
- Société Francophone de Nutrithérapie et de Nutrigénétique Appliquée, Villeurbanne, France
| | - Massimiliano Peana
- Department of Chemistry and Pharmacy, University of Sassari, Via Vienna 2, 07100, Sassari, Italy.
| | - Sadaf Noor
- Institute of Molecular Biology and Biotechnology, Bahauddin Zakariya University, Multan, Pakistan
| | - Roman Lysiuk
- Danylo Halytsky Lviv National Medical University, Lviv, Ukraine
- CONEM Ukraine Life Science Research Group, Danylo Halytsky Lviv National Medical University, Lviv, Ukraine
| | | | | | - Geir Bjørklund
- Council for Nutritional and Environmental Medicine (CONEM), Toften 24, 8610, Mo i Rana, Norway.
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18
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Oscanoa TJ, Romero-Ortuno R, Carvajal A, Savarino A. A pharmacological perspective of chloroquine in SARS-CoV-2 infection: An old drug for the fight against a new coronavirus? Int J Antimicrob Agents 2020; 56:106078. [PMID: 32629115 PMCID: PMC7334645 DOI: 10.1016/j.ijantimicag.2020.106078] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Revised: 06/24/2020] [Accepted: 06/28/2020] [Indexed: 02/06/2023]
Abstract
The coronavirus disease 2019 (COVID-19) pandemic caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is having serious consequences on health and the economy worldwide. All evidence-based treatment strategies need to be considered to combat this new virus. Drugs need to be considered on scientific grounds of efficacy, safety and cost. Chloroquine (CQ) and hydroxychloroquine (HCQ) are old drugs used in the treatment of malaria. Moreover, their antiviral properties have been previously studied, including against coronaviruses, where evidence of efficacy has been found. In the current race against time triggered by the COVID-19 pandemic, the search for new antivirals is very important. However, consideration should be given to old drugs with known anti-coronavirus activity, such as CQ and HCQ. These could be integrated into current treatment strategies while novel treatments are awaited, also in light of the fact that they display an anticoagulant effect that facilitates the activity of low-molecular-weight heparin, aimed at preventing acute respiratory distress syndrome (ARDS)-associated thrombotic events. The safety of CQ and HCQ has been studied for over 50 years, however recently published data raise concerns for cardiac toxicity of CQ/HCQ in patients with COVID-19. This review also re-examines the real information provided by some of the published alarming reports, although concluding that cardiac toxicity should in any case be stringently monitored in patients receiving CQ/HCQ.
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Affiliation(s)
- Teodoro J Oscanoa
- Department of Pharmacology, Facultad de Medicina, Universidad Nacional Mayor de San Marcos, Lima, Peru, and Drug Safety Research Center, Facultad de Medicina Humana, Universidad de San Martín de Porres, Hospital Almenara, ESSALUD, Lima, Peru.
| | - Roman Romero-Ortuno
- Discipline of Medical Gerontology, Mercer's Institute for Successful Ageing, St James's Hospital, Dublin, Ireland, and Global Brain Health Institute, Trinity College Dublin, Dublin, Ireland
| | - Alfonso Carvajal
- Centro de Estudios sobre la Seguridad de los Medicamentos (CESME), Universidad de Valladolid, Valladolid, Spain
| | - Andrea Savarino
- Department of Infectious Diseases, Istituto Superiore di Sanità, Rome, Italy
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19
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Chen X, Geiger JD. Janus sword actions of chloroquine and hydroxychloroquine against COVID-19. Cell Signal 2020; 73:109706. [PMID: 32629149 PMCID: PMC7333634 DOI: 10.1016/j.cellsig.2020.109706] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Revised: 06/26/2020] [Accepted: 06/29/2020] [Indexed: 02/06/2023]
Abstract
Chloroquine (CQ) and its analogue hydroxychloroquine (HCQ) have been thrust into our everyday vernacular because some believe, based on very limited basic and clinical data, that they might be helpful in preventing and/or lessening the severity of the pandemic coronavirus disease 2019 (COVID-19). However, lacking is a temperance in enthusiasm for their possible use as well as sufficient perspective on their effects and side-effects. CQ and HCQ have well-known properties of being diprotic weak bases that preferentially accumulate in acidic organelles (endolysosomes and Golgi apparatus) and neutralize luminal pH of acidic organelles. These primary actions of CQ and HCQ are responsible for their anti-malarial effects; malaria parasites rely on acidic digestive vacuoles for survival. Similarly, de-acidification of endolysosomes and Golgi by CQ and HCQ may block severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) integration into host cells because SARS-CoV-2 may require an acidic environment for its entry and for its ability to bud and infect bystander cells. Further, de-acidification of endolysosomes and Golgi may underly the immunosuppressive effects of these two drugs. However, modern cell biology studies have shown clearly that de-acidification results in profound changes in the structure, function and cellular positioning of endolysosomes and Golgi, in signaling between these organelles and other subcellular organelles, and in fundamental cellular functions. Thus, studying the possible therapeutic effects of CQ and HCQ against COVID-19 must occur concurrent with studies of the extent to which these drugs affect organellar and cell biology. When comprehensively examined, a better understanding of the Janus sword actions of these and other drugs might yield better decisions and better outcomes.
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Affiliation(s)
- Xuesong Chen
- Department of Biomedical Sciences, University of North Dakota School of Medicine and Health Sciences, Grand Forks, North Dakota, United States of America.
| | - Jonathan D Geiger
- Department of Biomedical Sciences, University of North Dakota School of Medicine and Health Sciences, Grand Forks, North Dakota, United States of America
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20
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Kalra RS, Tomar D, Meena AS, Kandimalla R. SARS-CoV-2, ACE2, and Hydroxychloroquine: Cardiovascular Complications, Therapeutics, and Clinical Readouts in the Current Settings. Pathogens 2020; 9:E546. [PMID: 32645974 PMCID: PMC7400328 DOI: 10.3390/pathogens9070546] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Revised: 06/30/2020] [Accepted: 07/05/2020] [Indexed: 01/08/2023] Open
Abstract
The rapidly evolving coronavirus disease 2019 (COVID-19, caused by severe acute respiratory syndrome coronavirus 2- SARS-CoV-2), has greatly burdened the global healthcare system and led it into crisis in several countries. Lack of targeted therapeutics led to the idea of repurposing broad-spectrum drugs for viral intervention. In vitro analyses of hydroxychloroquine (HCQ)'s anecdotal benefits prompted its widespread clinical repurposing globally. Reports of emerging cardiovascular complications due to its clinical prescription are revealing the crucial role of angiotensin-converting enzyme 2 (ACE2), which serves as a target receptor for SARS-CoV-2. In the present settings, a clear understanding of these targets, their functional aspects and physiological impact on cardiovascular function are critical. In an up-to-date format, we shed light on HCQ's anecdotal function in stalling SARS-CoV-2 replication and immunomodulatory activities. While starting with the crucial role of ACE2, we here discuss the impact of HCQ on systemic cardiovascular function, its associated risks, and the scope of HCQ-based regimes in current clinical settings. Citing the extent of HCQ efficacy, the key considerations and recommendations for the use of HCQ in clinics are further discussed. Taken together, this review provides crucial insights into the role of ACE2 in SARS-CoV-2-led cardiovascular activity, and concurrently assesses the efficacy of HCQ in contemporary clinical settings.
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Affiliation(s)
- Rajkumar Singh Kalra
- AIST-INDIA DAILAB, DBT-AIST International Center for Translational & Environmental Research (DAICENTER), National Institute of Advanced Industrial Science & Technology (AIST), Higashi 1-1-1, Tsukuba 305 8565, Japan
| | - Dhanendra Tomar
- Center for Translational Medicine, Lewis Katz School of Medicine, Temple University, Philadelphia, PA 19140, USA
| | - Avtar Singh Meena
- CSIR-Centre for Cellular and Molecular Biology (CCMB), Habsiguda, Uppal Road, Hyderabad 500 007, Telangana State, India;
| | - Ramesh Kandimalla
- Applied Biology, CSIR-Indian Institute of Chemical Technology (IICT), Uppal Road, Tarnaka, Hyderabad 500007, Telangana State, India;
- Department of Biochemistry, Kakatiya Medical College, Warangal 506007, Telangana State, India
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21
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Abstract
Enzyme activity may be more pathophysiologically relevant than enzyme quantity and is regulated by changes in conformational status that are undetectable by traditional proteomic approaches. Further, enzyme activity may provide insights into rapid physiological responses to inflammation/injury that are not dependent on de novo protein transcription. Activity-based protein profiling (ABPP) is a chemical proteomic approach designed to characterize and identify active enzymes within complex biological samples. Activity probes have been developed to interrogate multiple enzyme families with broad applicability, including but not limited to serine hydrolases, cysteine proteases, matrix metalloproteases, nitrilases, caspases, and histone deacetylases. The goal of this overview is to describe the overall rationale, approach, methods, challenges, and potential applications of ABPP to transplantation research. To do so, we present a case example of urine serine hydrolase ABPP in kidney transplant rejection to illustrate the utility and workflow of this analytical approach. Ultimately, developing novel transplant therapeutics is critically dependent on understanding the pathophysiological processes that result in loss of transplant function. ABPP offers a new dimension for characterizing dynamic changes in clinical samples. The capacity to identify and measure relevant enzyme activities provides fresh opportunities for understanding these processes and may help identify markers of disease activity for the development of novel diagnostics and real-time monitoring of patients. Finally, these insights into enzyme activity may also help to identify new transplant therapeutics, such as enzyme-specific inhibitors.
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22
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Tahiri Joutei Hassani R, Bennis A. Hydroxychloroquine as antiviral prophylaxis for exposed caregivers to Covid-19: An urgent appraisal is needed. J Infect Public Health 2020; 13:865-867. [PMID: 32451259 PMCID: PMC7211565 DOI: 10.1016/j.jiph.2020.05.005] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2020] [Revised: 04/22/2020] [Accepted: 05/06/2020] [Indexed: 12/23/2022] Open
Abstract
Background Since the onset of the new coronavirus pandemic, the world is facing a public health emergency. Repositioning hydroxychloroquine (HQ) seems to be a promising option. Many emerging evidences have converged on the effectiveness of HQ in the treatment of Covid-19 infection. In a recent paper, Gautret et al. suggested that further works are needed to determine if HQ antiviral prophylaxis is useful, especially for healthcare workers. Methods The purpose of this paper is to assess the Covid-19 exposure and risks level among caregivers. For this, we performed research on internet and PubMed by crossing the following keywords: healthcare givers, healthcare workers, doctors, nurses, coronavirus, Covid-19, mortality, infection rate, chloroquine, hydroxychloroquine. Results Data on healthcare worker's infection and mortality by Covid-19 are partial and are not systematically published. However, it seems that the infection rate varies between 3.8% and 9% depending on the country. Moreover, the mean age of this population is relatively old, especially in the OECD area. Conclusions Anti-Covid-19 HQ prophylaxis should be urgently accessed, especially for healthcare workers. It is to be hoped that HQ prophylaxis reduces the morbidity and mortality from Covid-19 infection among this population which is particularly exposed and relatively old.
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Affiliation(s)
| | - Ahmed Bennis
- Cardiology Department, Jerada Clinic, Casablanca, Morocco
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23
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Devaux CA, Rolain JM, Colson P, Raoult D. New insights on the antiviral effects of chloroquine against coronavirus: what to expect for COVID-19? Int J Antimicrob Agents 2020; 55:105938. [PMID: 32171740 PMCID: PMC7118659 DOI: 10.1016/j.ijantimicag.2020.105938] [Citation(s) in RCA: 655] [Impact Index Per Article: 163.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2020] [Revised: 03/03/2020] [Accepted: 03/05/2020] [Indexed: 02/07/2023]
Abstract
Recently, a novel coronavirus (2019-nCoV), officially known as severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), emerged in China. Despite drastic containment measures, the spread of this virus is ongoing. SARS-CoV-2 is the aetiological agent of coronavirus disease 2019 (COVID-19) characterised by pulmonary infection in humans. The efforts of international health authorities have since focused on rapid diagnosis and isolation of patients as well as the search for therapies able to counter the most severe effects of the disease. In the absence of a known efficient therapy and because of the situation of a public-health emergency, it made sense to investigate the possible effect of chloroquine/hydroxychloroquine against SARS-CoV-2 since this molecule was previously described as a potent inhibitor of most coronaviruses, including SARS-CoV-1. Preliminary trials of chloroquine repurposing in the treatment of COVID-19 in China have been encouraging, leading to several new trials. Here we discuss the possible mechanisms of chloroquine interference with the SARS-CoV-2 replication cycle.
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Affiliation(s)
- Christian A Devaux
- Aix-Marseille Université, IRD, APHM, MEPHI, IHU-Méditerranée Infection, Marseille, France; CNRS, Marseille, France; IHU-Méditerranée Infection, 19-21 boulevard Jean Moulin, 13005 Marseille, France.
| | - Jean-Marc Rolain
- Aix-Marseille Université, IRD, APHM, MEPHI, IHU-Méditerranée Infection, Marseille, France; IHU-Méditerranée Infection, 19-21 boulevard Jean Moulin, 13005 Marseille, France
| | - Philippe Colson
- Aix-Marseille Université, IRD, APHM, MEPHI, IHU-Méditerranée Infection, Marseille, France; IHU-Méditerranée Infection, 19-21 boulevard Jean Moulin, 13005 Marseille, France
| | - Didier Raoult
- Aix-Marseille Université, IRD, APHM, MEPHI, IHU-Méditerranée Infection, Marseille, France; IHU-Méditerranée Infection, 19-21 boulevard Jean Moulin, 13005 Marseille, France
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Is Coronavirus Disease 2019 (COVID-19) Associated with Renal Involvement? A Review of Century Infection. Jundishapur J Microbiol 2020. [DOI: 10.5812/jjm.102899] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
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25
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Moutaouakkil Y, Tadlaoui Y, Latt EEV, Atbib Y, Cherrah Y, Bennana A, Bousliman Y, Lamsaouri J. Les anti-inflammatoires et SARS-CoV-2 (COVID-19). DOULEURS : ÉVALUATION - DIAGNOSTIC - TRAITEMENT 2020. [PMCID: PMC7252016 DOI: 10.1016/j.douler.2020.04.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
À ce jour, les options thérapeutiques pour le COVID-19 sévère restent limitées et il n’existe actuellement aucun médicament ni vaccin efficace pour le traitement ou la prévention du SARS-CoV-2 spécifique pour traiter les patients gravement malades. Une nouvelle stratégie de traitement, en plus de la thérapie antivirale seule, est susceptible d’être nécessaire pour avoir un impact significatif sur les résultats cliniques. Un traitement immunomodulateur pour réguler à la baisse de choc cytokinique peut fournir des informations sur le traitement de COVID-19. L’utilisation combinée d’un agent immunomodulateur avec un agent antiviral peut donner aux médecins plus de temps pour fournir un traitement de soutien aux patients atteints de COVID-19. Dans cette revue de la littérature, les rôles de plusieurs médicaments anti-inflammatoires ont été passés en revue pour explorer leur efficacité dans la lutte contre le SARS-CoV-2.
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Affiliation(s)
- Youssef Moutaouakkil
- Pôle pharmacie, hôpital militaire d’instruction Mohamed V, Rabat, Maroc
- Laboratoire de pharmacologie-toxicologie, faculté de médecine et de pharmacie, université Mohamed V de Rabat, Rabat, Maroc
- Auteur correspondant.
| | - Yasmina Tadlaoui
- Pôle pharmacie, hôpital militaire d’instruction Mohamed V, Rabat, Maroc
| | - Esso Eric Valery Latt
- Pôle pharmacie, hôpital militaire d’instruction Mohamed V, Rabat, Maroc
- Laboratoire de pharmacologie-toxicologie, faculté de médecine et de pharmacie, université Mohamed V de Rabat, Rabat, Maroc
| | - Yassine Atbib
- Pôle pharmacie, hôpital militaire d’instruction Mohamed V, Rabat, Maroc
- Laboratoire de chimie thérapeutique, faculté de médecine et de pharmacie, université Mohamed V de Rabat, Rabat, Maroc
| | - Yahia Cherrah
- Laboratoire de pharmacologie-toxicologie, faculté de médecine et de pharmacie, université Mohamed V de Rabat, Rabat, Maroc
| | - Ahmed Bennana
- Laboratoire de chimie thérapeutique, faculté de médecine et de pharmacie, université Mohamed V de Rabat, Rabat, Maroc
| | - Yassir Bousliman
- Laboratoire de pharmacologie-toxicologie, faculté de médecine et de pharmacie, université Mohamed V de Rabat, Rabat, Maroc
| | - Jamal Lamsaouri
- Pôle pharmacie, hôpital militaire d’instruction Mohamed V, Rabat, Maroc
- Laboratoire de chimie thérapeutique, faculté de médecine et de pharmacie, université Mohamed V de Rabat, Rabat, Maroc
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Devaux CA, Rolain JM, Colson P, Raoult D. New insights on the antiviral effects of chloroquine against coronavirus: what to expect for COVID-19? Int J Antimicrob Agents 2020. [PMID: 32171740 DOI: 10.1016/j.ijantimicag.2020.105938.] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/30/2022]
Abstract
Recently, a novel coronavirus (2019-nCoV), officially known as severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), emerged in China. Despite drastic containment measures, the spread of this virus is ongoing. SARS-CoV-2 is the aetiological agent of coronavirus disease 2019 (COVID-19) characterised by pulmonary infection in humans. The efforts of international health authorities have since focused on rapid diagnosis and isolation of patients as well as the search for therapies able to counter the most severe effects of the disease. In the absence of a known efficient therapy and because of the situation of a public-health emergency, it made sense to investigate the possible effect of chloroquine/hydroxychloroquine against SARS-CoV-2 since this molecule was previously described as a potent inhibitor of most coronaviruses, including SARS-CoV-1. Preliminary trials of chloroquine repurposing in the treatment of COVID-19 in China have been encouraging, leading to several new trials. Here we discuss the possible mechanisms of chloroquine interference with the SARS-CoV-2 replication cycle.
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Affiliation(s)
- Christian A Devaux
- Aix-Marseille Université, IRD, APHM, MEPHI, IHU-Méditerranée Infection, Marseille, France; CNRS, Marseille, France; IHU-Méditerranée Infection, 19-21 boulevard Jean Moulin, 13005 Marseille, France.
| | - Jean-Marc Rolain
- Aix-Marseille Université, IRD, APHM, MEPHI, IHU-Méditerranée Infection, Marseille, France; IHU-Méditerranée Infection, 19-21 boulevard Jean Moulin, 13005 Marseille, France
| | - Philippe Colson
- Aix-Marseille Université, IRD, APHM, MEPHI, IHU-Méditerranée Infection, Marseille, France; IHU-Méditerranée Infection, 19-21 boulevard Jean Moulin, 13005 Marseille, France
| | - Didier Raoult
- Aix-Marseille Université, IRD, APHM, MEPHI, IHU-Méditerranée Infection, Marseille, France; IHU-Méditerranée Infection, 19-21 boulevard Jean Moulin, 13005 Marseille, France
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Puttappa N, Kumar RS, Kuppusamy G, Radhakrishnan A. Nano-facilitated drug delivery strategies in the treatment of plasmodium infection. Acta Trop 2019; 195:103-114. [PMID: 31039335 DOI: 10.1016/j.actatropica.2019.04.020] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2019] [Revised: 04/16/2019] [Accepted: 04/16/2019] [Indexed: 01/05/2023]
Abstract
Malaria, one of the major infectious disease-causing sizeable morbidity, mortality and economic loss worldwide. The main drawback for the failure to eradicate malaria is the spread of multiple drug resistance to the majority of currently available chemotherapy. At present nanotechnology offers an advanced opportunity in the delivery of drugs and vaccines to the desired targeted site in the body following oral and systemic administration. It confers the major advantages like improving drug pharmacokinetic profiles, reduce dose frequency and reduction in drug toxicity. Hence, Nano-based drug delivery system can provide a promising prospect in the way of malaria treatment. This paper is a review of recent researches highlighting includes nanocarriers loaded antimalarial drugs for better therapeutic efficacy and future perspective in the treatment of malaria.
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Affiliation(s)
- Nethravathi Puttappa
- Department of Pharmaceutics, JSS College of Pharmacy, JSS Academy of Higher Education & Research (Deemed to be University), Ooty, Tamil Nadu, India
| | - Raman Suresh Kumar
- Department of Pharmaceutics, JSS College of Pharmacy, JSS Academy of Higher Education & Research (Deemed to be University), Ooty, Tamil Nadu, India.
| | - Gowthamarajan Kuppusamy
- Department of Pharmaceutics, JSS College of Pharmacy, JSS Academy of Higher Education & Research (Deemed to be University), Ooty, Tamil Nadu, India
| | - Arun Radhakrishnan
- Department of Pharmaceutics, JSS College of Pharmacy, JSS Academy of Higher Education & Research (Deemed to be University), Ooty, Tamil Nadu, India
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28
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Zhou X, Huang JL, Shen HM, Xu B, Chen JH, Zhou XN. Immunomics analysis of Babesia microti protein markers by high-throughput screening assay. Ticks Tick Borne Dis 2018; 9:1468-1474. [PMID: 30017725 DOI: 10.1016/j.ttbdis.2018.07.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2018] [Revised: 07/01/2018] [Accepted: 07/03/2018] [Indexed: 11/28/2022]
Abstract
Babesia microti is a protozoan considered to be a major etiological agent of emerging human babesiosis. It imposes an increasing public-health threat and can be overlooked because of low parasitemia or mixed infection with other pathogens. More sensitive and specific antigens are needed to improve the diagnosis of babesiosis. To screen the immune diagnostic antigens of B. microti, 204 sequences from homologue proteins between B. microti and B. bovis genome sequences in PiroplasmaDB were selected. The high throughput cloned and expressed B. microti proteins were screened with the sera from the BALB/c mice infected by B. microti using protein arrays. Ten (5.9%, 10/169) highly immunoreactive proteins were identified, and most (80%, 8/10) of these highly immunoreactive proteins had not been characterized before, making them potentially useful as candidate antigens for the development of diagnostic tools for babesiosis.
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Affiliation(s)
- Xia Zhou
- Medical School of Soochow University, No. 199 Renai Road, Suzhou 215123, People's Republic of China; National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, WHO Collaborating Center for Tropical Diseases, National Center for International Research on Tropical Diseases, Key Laboratory of Parasite and Vector Biology of the Chinese Ministry of Health, Shanghai 200025, People's Republic of China.
| | - Ji-Lei Huang
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, WHO Collaborating Center for Tropical Diseases, National Center for International Research on Tropical Diseases, Key Laboratory of Parasite and Vector Biology of the Chinese Ministry of Health, Shanghai 200025, People's Republic of China.
| | - Hai-Mo Shen
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, WHO Collaborating Center for Tropical Diseases, National Center for International Research on Tropical Diseases, Key Laboratory of Parasite and Vector Biology of the Chinese Ministry of Health, Shanghai 200025, People's Republic of China.
| | - Bin Xu
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, WHO Collaborating Center for Tropical Diseases, National Center for International Research on Tropical Diseases, Key Laboratory of Parasite and Vector Biology of the Chinese Ministry of Health, Shanghai 200025, People's Republic of China.
| | - Jun-Hu Chen
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, WHO Collaborating Center for Tropical Diseases, National Center for International Research on Tropical Diseases, Key Laboratory of Parasite and Vector Biology of the Chinese Ministry of Health, Shanghai 200025, People's Republic of China.
| | - Xiao-Nong Zhou
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, WHO Collaborating Center for Tropical Diseases, National Center for International Research on Tropical Diseases, Key Laboratory of Parasite and Vector Biology of the Chinese Ministry of Health, Shanghai 200025, People's Republic of China.
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29
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Schmidt M, Hrabcova V, Jun D, Kuca K, Musilek K. Vector Control and Insecticidal Resistance in the African Malaria Mosquito Anopheles gambiae. Chem Res Toxicol 2018; 31:534-547. [PMID: 29847927 DOI: 10.1021/acs.chemrestox.7b00285] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Mosquito-borne diseases (including malaria) belong among the leading causes of death in humans. Vector control is a crucial part of the global strategy for management of mosquito-associated diseases, when insecticide use is the most important component in this effort. However, drug and insecticide resistance threaten the successes made with existing methods. Reduction or elimination of malaria is not possible without effective mosquito control. This article reviews current strategies of intervention in vector control to decrease transmission of disease and covers current relevant knowledge in molecular biology, biochemistry, and medicinal chemistry.
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Affiliation(s)
- Monika Schmidt
- Biomedical Research Centre , University Hospital Hradec Kralove , Sokolska 581 , 500 05 Hradec Kralove , Czech Republic.,Faculty of Science, Department of Chemistry , University of Hradec Kralove , Rokitanskeho 62 , 500 03 Hradec Kralove , Czech Republic
| | - Veronika Hrabcova
- Biomedical Research Centre , University Hospital Hradec Kralove , Sokolska 581 , 500 05 Hradec Kralove , Czech Republic.,Faculty of Science, Department of Chemistry , University of Hradec Kralove , Rokitanskeho 62 , 500 03 Hradec Kralove , Czech Republic
| | - Daniel Jun
- Biomedical Research Centre , University Hospital Hradec Kralove , Sokolska 581 , 500 05 Hradec Kralove , Czech Republic.,Faculty of Military Health Sciences, Department of Toxicology and Military Pharmacy , University of Defence , Trebesska 1575 , 500 01 Hradec Kralove , Czech Republic
| | - Kamil Kuca
- Biomedical Research Centre , University Hospital Hradec Kralove , Sokolska 581 , 500 05 Hradec Kralove , Czech Republic.,Faculty of Science, Department of Chemistry , University of Hradec Kralove , Rokitanskeho 62 , 500 03 Hradec Kralove , Czech Republic
| | - Kamil Musilek
- Biomedical Research Centre , University Hospital Hradec Kralove , Sokolska 581 , 500 05 Hradec Kralove , Czech Republic.,Faculty of Science, Department of Chemistry , University of Hradec Kralove , Rokitanskeho 62 , 500 03 Hradec Kralove , Czech Republic
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30
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Wadood A, Ghufran M, Hassan SF, Khan H, Azam SS, Rashid U. In silico identification of promiscuous scaffolds as potential inhibitors of 1-deoxy-d-xylulose 5-phosphate reductoisomerase for treatment of Falciparum malaria. PHARMACEUTICAL BIOLOGY 2017; 55:19-32. [PMID: 27650666 PMCID: PMC7011789 DOI: 10.1080/13880209.2016.1225778] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2016] [Accepted: 08/12/2016] [Indexed: 05/20/2023]
Abstract
CONTEXT Malaria remains one of the prevalent infectious diseases worldwide. Plasmodium falciparum 1-deoxy-d-xylulose-5-phosphate reductoisomerase (PfDXR) plays a role in isoprenoid biosynthesis in the malaria parasite, making this parasite enzyme an attractive target for antimalarial drug design. Fosmidomycin is a promising DXR inhibitor, which showed safety as well as efficacy against Plasmodium falciparum malaria in clinical trials. However, due to its poor oral bioavailability and non-drug-like properties, the focus of medicinal chemists is to develop inhibitors with improved pharmacological properties. OBJECTIVE This study described the computational design of new and potent inhibitors for deoxyxylulose 5-phosphate reductoisomerase and the prediction of their pharmacokinetic and pharmacodynamic properties. MATERIAL AND METHODS A complex-based pharmacophore model was generated from the complex X-ray crystallographic structure of PfDXR using MOE (Molecular Operating Environment). Furthermore, MOE-Dock was used as docking software to predict the binding modes of hits and target enzyme. RESULTS Finally, 14 compounds were selected as new and potent inhibitors of PfDXR on the basis of pharmacophore mapping, docking score, binding energy and binding interactions with the active site residues of the target protein. The predicted pharmacokinetic properties showed improved permeability by efficiently crossing blood-brain barrier. While, in silico promiscuity binding data revealed that these hits also have the ability to bind with other P. falciparum drug targets. DISCUSSION AND CONCLUSION In conclusion, innovative scaffolds with novel modes of action, improved efficacy and acceptable physiochemical/pharmacokinetic properties were computationally identified.
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Affiliation(s)
- Abdul Wadood
- Department of Biochemistry, Abdul Wali Khan University Mardan, Mardan, Pakistan
- CONTACT Abdul WadoodDepartment of Biochemistry, Abdul Wali Khan University Mardan, Mardan 23200, Pakistan; Umer Rashid Department of Chemistry, COMSAT, Abbatabad, Pakistan
| | - Mehreen Ghufran
- Department of Biochemistry, Abdul Wali Khan University Mardan, Mardan, Pakistan
| | | | - Huma Khan
- Department of Biochemistry, Abdul Wali Khan University Mardan, Mardan, Pakistan
| | - Syed Sikandar Azam
- Department of Bioinformatics, Quaid-i-Azam University, Islamabad, Pakistan
| | - Umer Rashid
- Department of Chemistry, COMSAT, Abbatabad, Pakistan
- CONTACT Abdul WadoodDepartment of Biochemistry, Abdul Wali Khan University Mardan, Mardan 23200, Pakistan; Umer Rashid Department of Chemistry, COMSAT, Abbatabad, Pakistan
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31
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Pinkaew D, Fujise K. Fortilin: A Potential Target for the Prevention and Treatment of Human Diseases. Adv Clin Chem 2017; 82:265-300. [PMID: 28939212 DOI: 10.1016/bs.acc.2017.06.006] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Fortilin is a highly conserved 172-amino-acid polypeptide found in the cytosol, nucleus, mitochondria, extracellular space, and circulating blood. It is a multifunctional protein that protects cells against apoptosis, promotes cell growth and cell cycle progression, binds calcium (Ca2+) and has antipathogen activities. Its role in the pathogenesis of human and animal diseases is also diverse. Fortilin facilitates the development of atherosclerosis, contributes to both systemic and pulmonary arterial hypertension, participates in the development of cancers, and worsens diabetic nephropathy. It is important for the adaptive expansion of pancreatic β-cells in response to obesity and increased insulin requirement, for the regeneration of liver after hepatectomy, and for protection of the liver against alcohol- and ER stress-induced injury. Fortilin is a viable surrogate marker for in vivo apoptosis, and it plays a key role in embryo and organ development in vertebrates. In fish and shrimp, fortilin participates in host defense against bacterial and viral pathogens. Further translational research could prove fortilin to be a viable molecular target for treatment of various human diseases including and not limited to atherosclerosis, hypertension, certain tumors, diabetes mellitus, diabetic nephropathy, hepatic injury, and aberrant immunity and host defense.
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Affiliation(s)
- Decha Pinkaew
- University of Texas Medical Branch at Galveston, Galveston, TX, United States
| | - Ken Fujise
- University of Texas Medical Branch at Galveston, Galveston, TX, United States; The Institute of Translational Sciences, University of Texas Medical Branch at Galveston, Galveston, TX, United States.
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32
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Sievers A, Bosiek K, Bisch M, Dreessen C, Riedel J, Froß P, Hausmann M, Hildenbrand G. K-mer Content, Correlation, and Position Analysis of Genome DNA Sequences for the Identification of Function and Evolutionary Features. Genes (Basel) 2017; 8:E122. [PMID: 28422050 PMCID: PMC5406869 DOI: 10.3390/genes8040122] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2017] [Revised: 03/24/2017] [Accepted: 04/04/2017] [Indexed: 12/26/2022] Open
Abstract
In genome analysis, k-mer-based comparison methods have become standard tools. However, even though they are able to deliver reliable results, other algorithms seem to work better in some cases. To improve k-mer-based DNA sequence analysis and comparison, we successfully checked whether adding positional resolution is beneficial for finding and/or comparing interesting organizational structures. A simple but efficient algorithm for extracting and saving local k-mer spectra (frequency distribution of k-mers) was developed and used. The results were analyzed by including positional information based on visualizations as genomic maps and by applying basic vector correlation methods. This analysis was concentrated on small word lengths (1 ≤ k ≤ 4) on relatively small viral genomes of Papillomaviridae and Herpesviridae, while also checking its usability for larger sequences, namely human chromosome 2 and the homologous chromosomes (2A, 2B) of a chimpanzee. Using this alignment-free analysis, several regions with specific characteristics in Papillomaviridae and Herpesviridae formerly identified by independent, mostly alignment-based methods, were confirmed. Correlations between the k-mer content and several genes in these genomes have been found, showing similarities between classified and unclassified viruses, which may be potentially useful for further taxonomic research. Furthermore, unknown k-mer correlations in the genomes of Human Herpesviruses (HHVs), which are probably of major biological function, are found and described. Using the chromosomes of a chimpanzee and human that are currently known, identities between the species on every analyzed chromosome were reproduced. This demonstrates the feasibility of our approach for large data sets of complex genomes. Based on these results, we suggest k-mer analysis with positional resolution as a method for closing a gap between the effectiveness of alignment-based methods (like NCBI BLAST) and the high pace of standard k-mer analysis.
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Affiliation(s)
- Aaron Sievers
- Kirchhoff-Institute for Physics, Heidelberg University, INF 227, 69117 Heidelberg, Germany.
| | - Katharina Bosiek
- Kirchhoff-Institute for Physics, Heidelberg University, INF 227, 69117 Heidelberg, Germany.
| | - Marc Bisch
- Kirchhoff-Institute for Physics, Heidelberg University, INF 227, 69117 Heidelberg, Germany.
| | - Chris Dreessen
- Kirchhoff-Institute for Physics, Heidelberg University, INF 227, 69117 Heidelberg, Germany.
| | - Jascha Riedel
- Kirchhoff-Institute for Physics, Heidelberg University, INF 227, 69117 Heidelberg, Germany.
| | - Patrick Froß
- Kirchhoff-Institute for Physics, Heidelberg University, INF 227, 69117 Heidelberg, Germany.
| | - Michael Hausmann
- Kirchhoff-Institute for Physics, Heidelberg University, INF 227, 69117 Heidelberg, Germany.
| | - Georg Hildenbrand
- Kirchhoff-Institute for Physics, Heidelberg University, INF 227, 69117 Heidelberg, Germany.
- Department of Radiation Oncology, Universitätsmedizin Mannheim, Medical Faculty Mannheim, Heidelberg University, Theodor-Kutzer-Ufer 1-3, 68167 Mannheim, Germany.
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33
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QSAR modeling and chemical space analysis of antimalarial compounds. J Comput Aided Mol Des 2017; 31:441-451. [PMID: 28374255 DOI: 10.1007/s10822-017-0019-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2016] [Accepted: 03/18/2017] [Indexed: 10/19/2022]
Abstract
Generative topographic mapping (GTM) has been used to visualize and analyze the chemical space of antimalarial compounds as well as to build predictive models linking structure of molecules with their antimalarial activity. For this, a database, including ~3000 molecules tested in one or several of 17 anti-Plasmodium activity assessment protocols, has been compiled by assembling experimental data from in-house and ChEMBL databases. GTM classification models built on subsets corresponding to individual bioassays perform similarly to the earlier reported SVM models. Zones preferentially populated by active and inactive molecules, respectively, clearly emerge in the class landscapes supported by the GTM model. Their analysis resulted in identification of privileged structural motifs of potential antimalarial compounds. Projection of marketed antimalarial drugs on this map allowed us to delineate several areas in the chemical space corresponding to different mechanisms of antimalarial activity. This helped us to make a suggestion about the mode of action of the molecules populating these zones.
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Brown RWB, Sharma AI, Engman DM. Dynamic protein S-palmitoylation mediates parasite life cycle progression and diverse mechanisms of virulence. Crit Rev Biochem Mol Biol 2017; 52:145-162. [PMID: 28228066 PMCID: PMC5560270 DOI: 10.1080/10409238.2017.1287161] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Eukaryotic parasites possess complex life cycles and utilize an assortment of molecular mechanisms to overcome physical barriers, suppress and/or bypass the host immune response, including invading host cells where they can replicate in a protected intracellular niche. Protein S-palmitoylation is a dynamic post-translational modification in which the fatty acid palmitate is covalently linked to cysteine residues on proteins by the enzyme palmitoyl acyltransferase (PAT) and can be removed by lysosomal palmitoyl-protein thioesterase (PPT) or cytosolic acyl-protein thioesterase (APT). In addition to anchoring proteins to intracellular membranes, functions of dynamic palmitoylation include - targeting proteins to specific intracellular compartments via trafficking pathways, regulating the cycling of proteins between membranes, modulating protein function and regulating protein stability. Recent studies in the eukaryotic parasites - Plasmodium falciparum, Toxoplasma gondii, Trypanosoma brucei, Cryptococcus neoformans and Giardia lamblia - have identified large families of PATs and palmitoylated proteins. Many palmitoylated proteins are important for diverse aspects of pathogenesis, including differentiation into infective life cycle stages, biogenesis and tethering of secretory organelles, assembling the machinery powering motility and targeting virulence factors to the plasma membrane. This review aims to summarize our current knowledge of palmitoylation in eukaryotic parasites, highlighting five exemplary mechanisms of parasite virulence dependent on palmitoylation.
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Affiliation(s)
- Robert W B Brown
- a Department of Pathology and Laboratory Medicine , Cedars-Sinai Medical Center , Los Angeles , CA , USA
| | - Aabha I Sharma
- b Departments of Pathology and Microbiology-Immunology , Northwestern University , Chicago , IL , USA
| | - David M Engman
- a Department of Pathology and Laboratory Medicine , Cedars-Sinai Medical Center , Los Angeles , CA , USA
- b Departments of Pathology and Microbiology-Immunology , Northwestern University , Chicago , IL , USA
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35
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Devender N, Gunjan S, Tripathi R, Tripathi RP. Synthesis and antiplasmodial activity of novel indoleamide derivatives bearing sulfonamide and triazole pharmacophores. Eur J Med Chem 2017; 131:171-184. [PMID: 28319782 DOI: 10.1016/j.ejmech.2017.03.010] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2016] [Revised: 03/03/2017] [Accepted: 03/06/2017] [Indexed: 12/19/2022]
Abstract
Due to the recent reports of growing parasite resistance to artemisinins and other antimalarial drugs, development of new antimalarial chemotypes is an urgent priority. Here in, we report a novel series of adamantyl/cycloheptyl indoleamide derivatives bearing sulfonamide and triazole pharmacophores adopting different chemical modifications and evaluated them for antiplasmodial activity in vitro. Among all the indoleamides, compounds 22, 24, 26 and 30 with sulfonamide pharmacophore showed promising activity with IC50 of 1.87, 1.93, 2.00, 2.17 μM against CQ sensitive Pf3D7 strain and 1.69, 2.12, 1.60, 2.19 μM against CQ resistant PfK1 strain, respectively.
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Affiliation(s)
- N Devender
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, Lucknow, 226031, India
| | - Sarika Gunjan
- Parasitology Division, CSIR-Central Drug Research Institute, Lucknow, 226031, India; Academy of Scientific and Innovative Research (AcSIR), New Delhi, 110001, India
| | - Renu Tripathi
- Parasitology Division, CSIR-Central Drug Research Institute, Lucknow, 226031, India; Academy of Scientific and Innovative Research (AcSIR), New Delhi, 110001, India.
| | - Rama Pati Tripathi
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, Lucknow, 226031, India; Academy of Scientific and Innovative Research (AcSIR), New Delhi, 110001, India.
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Parhizgar AR, Tahghighi A. Introducing New Antimalarial Analogues of Chloroquine and Amodiaquine: A Narrative Review. IRANIAN JOURNAL OF MEDICAL SCIENCES 2017; 42:115-128. [PMID: 28360437 PMCID: PMC5366359] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/18/2016] [Revised: 05/02/2016] [Accepted: 06/05/2016] [Indexed: 11/03/2022]
Abstract
Antimalarial drugs with the 4-aminoquinoline scaffold such as the important drugs, chloroquine (CQ) and amodiaquine (AQ), have been used to prevent and treat malaria for many years. The importance of these drugs is related to their simple usage, high efficacy, affordability, and cost-effectiveness of their synthesis. In recent years, with the spread of parasite resistance to CQ and cross-resistance to its other analogues have decreased their consumption in many geographical areas. On the other hand, AQ is an effective antimalarial drug which its usage has been restricted due to hepatic and hematological toxicities. The significance of the quinoline ring at quinoline-based antimalarial drugs has prompted research centers and pharmaceutical companies to focus on the design and synthesis of new analogues of these drugs, especially CQ and AQ analogues. Accordingly, various derivatives have been synthesized and evaluated in vitro and in vivo against the resistant strains of the malaria parasite to solve the problem of drug resistance. Also, the pharmacokinetic properties of these compounds have been evaluated to augment their efficacy and diminish their toxicity. Some of these analogues are currently in clinical and preclinical development. Consequently, the recent researches showed yet 4-aminoquinoline scaffold is active moiety in new compounds with antiplasmodial activity. Hence, the aim of this review article is to introduce of the novel synthetic analogues of CQ and AQ, which may constitute the next generation of antimalarial drugs with the 4-aminoquinoline scaffold.
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Affiliation(s)
- Arezoo Rafiee Parhizgar
- Malaria and Vector Research Group (MVRG), Biotechnology Research Center (BRC), Pasteur Institute of Iran, Tehran, Iran
- Department of Medicinal Chemistry, Pharmaceutical Sciences Branch, Islamic Azad University, Tehran, Iran
| | - Azar Tahghighi
- Malaria and Vector Research Group (MVRG), Biotechnology Research Center (BRC), Pasteur Institute of Iran, Tehran, Iran
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Chen SB, Wang Y, Kassegne K, Xu B, Shen HM, Chen JH. Whole-genome sequencing of a Plasmodium vivax clinical isolate exhibits geographical characteristics and high genetic variation in China-Myanmar border area. BMC Genomics 2017; 18:131. [PMID: 28166727 PMCID: PMC5294834 DOI: 10.1186/s12864-017-3523-y] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2016] [Accepted: 01/27/2017] [Indexed: 11/29/2022] Open
Abstract
Background Currently in China, the trend of Plasmodium vivax cases imported from Southeast Asia was increased especially in the China-Myanmar border area. Driven by the increase in P. vivax cases and stronger need for vaccine and drug development, several P. vivax isolates genome sequencing projects are underway. However, little is known about the genetic variability in this area until now. Results The sequencing of the first P. vivax isolate from China-Myanmar border area (CMB-1) generated 120 million paired-end reads. A percentage of 10.6 of the quality-evaluated reads were aligned onto 99.9% of the reference strain Sal I genome in 62-fold coverage with an average of 4.8 SNPs per kb. We present a 539-SNP marker data set for P. vivax that can identify different parasites from different geographic origins with high sensitivity. We also identified exceptionally high levels of genetic variability in members of multigene families such as RBP, SERA, vir, MSP3 and AP2. The de-novo assembly yielded a database composed of 8,409 contigs with N50 lengths of 6.6 kb and revealed 661 novel predicted genes including 78 vir genes, suggesting a greater functional variation in P. vivax from this area. Conclusion Our result contributes to a better understanding of P. vivax genetic variation, and provides a fundamental basis for the geographic differentiation of vivax malaria from China-Myanmar border area using a direct sequencing approach without leukocyte depletion. This novel sequencing method can be used as an essential tool for the genomic research of P. vivax in the near future. Electronic supplementary material The online version of this article (doi:10.1186/s12864-017-3523-y) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Shen-Bo Chen
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, WHO Collaborating Centre for Tropical Diseases, National Center for International Research on Tropical Diseases, Key Laboratory of Parasite and Vector Biology Ministry of Health, Shanghai, 200025, People's Republic of China
| | - Yue Wang
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, WHO Collaborating Centre for Tropical Diseases, National Center for International Research on Tropical Diseases, Key Laboratory of Parasite and Vector Biology Ministry of Health, Shanghai, 200025, People's Republic of China.,Institute of Parasitic Diseases, Zhejiang Academy of Medical Sciences, Hangzhou, 310013, People's Republic of China
| | - Kokouvi Kassegne
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, WHO Collaborating Centre for Tropical Diseases, National Center for International Research on Tropical Diseases, Key Laboratory of Parasite and Vector Biology Ministry of Health, Shanghai, 200025, People's Republic of China
| | - Bin Xu
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, WHO Collaborating Centre for Tropical Diseases, National Center for International Research on Tropical Diseases, Key Laboratory of Parasite and Vector Biology Ministry of Health, Shanghai, 200025, People's Republic of China
| | - Hai-Mo Shen
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, WHO Collaborating Centre for Tropical Diseases, National Center for International Research on Tropical Diseases, Key Laboratory of Parasite and Vector Biology Ministry of Health, Shanghai, 200025, People's Republic of China.
| | - Jun-Hu Chen
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, WHO Collaborating Centre for Tropical Diseases, National Center for International Research on Tropical Diseases, Key Laboratory of Parasite and Vector Biology Ministry of Health, Shanghai, 200025, People's Republic of China.
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Nik Kamarudin NAA, Mohammed NA, Mustaffa KMF. Aptamer Technology: Adjunct Therapy for Malaria. Biomedicines 2017; 5:biomedicines5010001. [PMID: 28536344 PMCID: PMC5423489 DOI: 10.3390/biomedicines5010001] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2016] [Revised: 12/08/2016] [Accepted: 12/16/2016] [Indexed: 02/07/2023] Open
Abstract
Malaria is a life-threatening parasitic infection occurring in the endemic areas, primarily in children under the age of five, pregnant women, and patients with human immunodeficiency virus and acquired immunodeficiency syndrome (HIV)/(AIDS) as well as non-immune individuals. The cytoadherence of infected erythrocytes (IEs) to the host endothelial surface receptor is a known factor that contributes to the increased prevalence of severe malaria cases due to the accumulation of IEs, mainly in the brain and other vital organs. Therefore, further study is needed to discover a new potential anti-adhesive drug to treat severe malaria thus reducing its mortality rate. In this review, we discuss how the aptamer technology could be applied in the development of a new adjunct therapy for current malaria treatment.
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Affiliation(s)
- Nik Abdul Aziz Nik Kamarudin
- Institute for Research in Molecular Medicine (INFORMM), Universiti Sains Malaysia, Health Campus, Kubang Kerian, 16150 Kelantan, Malaysia.
| | - Nurul Adila Mohammed
- Institute for Research in Molecular Medicine (INFORMM), Universiti Sains Malaysia, Health Campus, Kubang Kerian, 16150 Kelantan, Malaysia.
| | - Khairul Mohd Fadzli Mustaffa
- Institute for Research in Molecular Medicine (INFORMM), Universiti Sains Malaysia, Health Campus, Kubang Kerian, 16150 Kelantan, Malaysia.
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Tay CL, Jones ML, Hodson N, Theron M, Choudhary JS, Rayner JC. Study of Plasmodium falciparum DHHC palmitoyl transferases identifies a role for PfDHHC9 in gametocytogenesis. Cell Microbiol 2016; 18:1596-1610. [PMID: 27060339 PMCID: PMC5091645 DOI: 10.1111/cmi.12599] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2014] [Revised: 03/22/2016] [Accepted: 03/29/2016] [Indexed: 11/26/2022]
Abstract
Palmitoylation is the post-translational reversible addition of the acyl moiety, palmitate, to cysteine residues of proteins and is involved in regulating protein trafficking, localization, stability and function. The Aspartate-Histidine-Histidine-Cysteine (DHHC) protein family, named for their highly conserved DHHC signature motif, is thought to be responsible for catalysing protein palmitoylation. Palmitoylation is widespread in all eukaryotes, including the malaria parasite, Plasmodium falciparum, where over 400 palmitoylated proteins are present in the asexual intraerythrocytic schizont stage parasites, including proteins involved in key aspects of parasite maturation and development. The P. falciparum genome includes 12 proteins containing the conserved DHHC motif. In this study, we adapted a palmitoyl-transferase activity assay for use with P. falciparum proteins and demonstrated for the first time that P. falciparum DHHC proteins are responsible for the palmitoylation of P. falciparum substrates. This assay also reveals that multiple DHHCs are capable of palmitoylating the same substrate, indicating functional redundancy at least in vitro. To test whether functional redundancy also exists in vivo, we investigated the endogenous localization and essentiality of a subset of schizont-expressed PfDHHC proteins. Individual PfDHHC proteins localized to distinct organelles, including parasite-specific organelles such as the rhoptries and inner membrane complex. Knock-out studies identified individual DHHCs that may be essential for blood-stage growth and others that were functionally redundant in the blood stages but may have functions in other stages of parasite development. Supporting this hypothesis, disruption of PfDHHC9 had no effect on blood-stage growth but reduced the formation of gametocytes, suggesting that this protein could be exploited as a transmission-blocking target. The localization and stage-specific expression of the DHHC proteins may be important for regulating their substrate specificity and thus may provide a path for inhibitor development.
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Affiliation(s)
- Chwen L Tay
- Malaria Programme, Wellcome Trust Sanger Institute, Cambridge, UK
| | - Matthew L Jones
- Malaria Programme, Wellcome Trust Sanger Institute, Cambridge, UK
| | - Nicola Hodson
- Malaria Programme, Wellcome Trust Sanger Institute, Cambridge, UK
| | - Michel Theron
- Malaria Programme, Wellcome Trust Sanger Institute, Cambridge, UK
| | - Jyoti S Choudhary
- Proteomic Mass Spectrometry, The Wellcome Trust Sanger Institute, The Wellcome Trust Genome Campus, Hinxton, Cambridge, CB10 1SA, UK
| | - Julian C Rayner
- Malaria Programme, Wellcome Trust Sanger Institute, Cambridge, UK.
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40
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Synthesis and stereochemical determination of an antiparasitic pseudo-aminal type monoterpene indole alkaloid. J Nat Med 2016; 70:302-17. [PMID: 27324906 PMCID: PMC4935745 DOI: 10.1007/s11418-016-1012-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2016] [Accepted: 05/14/2016] [Indexed: 01/02/2023]
Abstract
5-Nor stemmadenine alkaloids, isolated from the genus Tabernaemontana, display a range of bioactivity. 16-Hydroxy-16,22-dihydroapparicine, the active component of an extract from the Tabernaemontana sp. (dichotoma, elegans, and divaricate), exhibited potent antimalarial activity, representing the first such report of the antimalarial property of 5-nor stemmadenine alkaloids. We, therefore, decided to attempt the total synthesis of the compound to explore its antimalarial activity and investigate structure and bioactivity relationships. As a result, we completed the first total synthesis of 16-hydroxy-16,22-dihydroapparicine, by combining a phosphine-mediated cascade reaction, diastereoselective nucleophilic addition of 2-acylindole or methylketone via a Felkin-Anh transition state, and chirality transferring intramolecular Michael addition. We also clarified the absolute stereochemistries of the compound. Furthermore, we evaluated the activity of the synthetic compound, as well as that of some intermediates, all of which showed weak activity against chloroquine-resistant Plasmodium falciparum (K1 strain) malaria parasites.
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Krungkrai SR, Krungkrai J. Insights into the pyrimidine biosynthetic pathway of human malaria parasite Plasmodium falciparum as chemotherapeutic target. ASIAN PAC J TROP MED 2016; 9:525-34. [PMID: 27262062 DOI: 10.1016/j.apjtm.2016.04.012] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2016] [Revised: 03/16/2016] [Accepted: 04/08/2016] [Indexed: 11/25/2022] Open
Abstract
Malaria is a major cause of morbidity and mortality in humans. Artemisinins remain as the first-line treatment for Plasmodium falciparum (P. falciparum) malaria although drug resistance has already emerged and spread in Southeast Asia. Thus, to fight this disease, there is an urgent need to develop new antimalarial drugs for malaria chemotherapy. Unlike human host cells, P. falciparum cannot salvage preformed pyrimidine bases or nucleosides from the extracellular environment and relies solely on nucleotides synthesized through the de novo biosynthetic pathway. This review presents significant progress on understanding the de novo pyrimidine pathway and the functional enzymes in the human parasite P. falciparum. Current knowledge in genomics and metabolomics are described, particularly focusing on the parasite purine and pyrimidine nucleotide metabolism. These include gene annotation, characterization and molecular mechanism of the enzymes that are different from the human host pathway. Recent elucidation of the three-dimensional crystal structures and the catalytic reactions of three enzymes: dihydroorotate dehydrogenase, orotate phosphoribosyltransferase, and orotidine 5'-monophosphate decarboxylase, as well as their inhibitors are reviewed in the context of their therapeutic potential against malaria.
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Affiliation(s)
- Sudaratana R Krungkrai
- Unit of Biochemistry, Department of Medical Science, Faculty of Science, Rangsit University, Pathumthani 12000, Thailand
| | - Jerapan Krungkrai
- Department of Biochemistry, Faculty of Medicine, Chulalongkorn University, Pathumwan, Bangkok 10330, Thailand.
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Khan S. Recent advances in the biology and drug targeting of malaria parasite aminoacyl-tRNA synthetases. Malar J 2016; 15:203. [PMID: 27068331 PMCID: PMC4828885 DOI: 10.1186/s12936-016-1247-0] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2015] [Accepted: 03/30/2016] [Indexed: 11/22/2022] Open
Abstract
Escalating drug resistance in malaria parasites and lack of vaccine entails the discovery of novel drug targets and inhibitor molecules. The multi-component protein translation machinery is a rich source of such drug targets. Malaria parasites contain three translational compartments: the cytoplasm, apicoplast and mitochondrion, of which the latter two are of the prokaryotic type. Recent explorations by many groups into the malaria parasite protein translation enzymes, aminoacyl-tRNA synthetases (aaRSs), have yielded many promising inhibitors. The understanding of the biology of this unique set of 36 enzymes has become much clearer in recent times. Current review discusses the advances made in understanding of crucial aaRSs from Plasmodium and also the specific inhibitors found against malaria aaRSs.
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Affiliation(s)
- Sameena Khan
- Drug Discovery Research Centre, Translational Health Science and Technology Institute (THSTI), NCR Biotech Science Cluster, 3rd Milestone, Faridabad-Gurgaon Expressway, PO box #04, Faridabad, 121001, India.
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Shen HM, Chen SB, Wang Y, Chen JH. Whole-genome sequencing of a Plasmodium vivax isolate from the China-Myanmar border area. Mem Inst Oswaldo Cruz 2016; 110:814-6. [PMID: 26517664 PMCID: PMC4667588 DOI: 10.1590/0074-02760150216] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2015] [Accepted: 08/03/2015] [Indexed: 11/23/2022] Open
Abstract
Currently, there is a trend of an increasing number of Plasmodium
vivaxmalaria cases in China that are imported across its Southeast Asia
border, especially in the China-Myanmar border area (CMB). To date, little is known
about the genetic diversity of P. vivax in this region. In this
paper, we report the first genome sequencing of a P. vivaxisolate
(CMB-1) from a vivax malaria patient in CMB. The sequencing data were aligned onto
96.43% of the P. vivax Salvador I reference strain (Sal I) genome
with 7.84-fold coverage as well as onto 98.32% of 14 Sal I chromosomes. Using
the de novo assembly approach, we generated 8,541 scaffolds and
assembled a total of 27.1 Mb of sequence into CMB-1 scaffolds. Furthermore, we
identified all 295 known virgenes, which is the largest subtelomeric
multigene family in malaria parasites. These results provide an important foundation
for further research onP. vivax population genetics.
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Affiliation(s)
- Hai-Mo Shen
- Chinese Center for Disease Control and Prevention, National Institute of Parasitic Diseases, Shanghai, People's Republic of China
| | - Shen-Bo Chen
- Chinese Center for Disease Control and Prevention, National Institute of Parasitic Diseases, Shanghai, People's Republic of China
| | - Yue Wang
- Chinese Center for Disease Control and Prevention, National Institute of Parasitic Diseases, Shanghai, People's Republic of China
| | - Jun-Hu Chen
- Chinese Center for Disease Control and Prevention, National Institute of Parasitic Diseases, Shanghai, People's Republic of China
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Gunawardena S, Karunaweera ND. Advances in genetics and genomics: use and limitations in achieving malaria elimination goals. Pathog Glob Health 2016; 109:123-41. [PMID: 25943157 DOI: 10.1179/2047773215y.0000000015] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022] Open
Abstract
Success of the global research agenda towards eradication of malaria will depend on the development of new tools, including drugs, vaccines, insecticides and diagnostics. Genetic and genomic information now available for the malaria parasites, their mosquito vectors and human host, can be harnessed to both develop these tools and monitor their effectiveness. Here we review and provide specific examples of current technological advances and how these genetic and genomic tools have increased our knowledge of host, parasite and vector biology in relation to malaria elimination and in turn enhanced the potential to reach that goal. We then discuss limitations of these tools and future prospects for the successful achievement of global malaria elimination goals.
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Structural and functional attributes of malaria parasite diadenosine tetraphosphate hydrolase. Sci Rep 2016; 6:19981. [PMID: 26829485 PMCID: PMC4734340 DOI: 10.1038/srep19981] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2015] [Accepted: 12/15/2015] [Indexed: 11/09/2022] Open
Abstract
Malaria symptoms are driven by periodic multiplication cycles of Plasmodium parasites in human red blood corpuscles (RBCs). Malaria infection still accounts for ~600,000 annual deaths, and hence discovery of both new drug targets and drugs remains vital. In the present study, we have investigated the malaria parasite enzyme diadenosine tetraphosphate (Ap4A) hydrolase that regulates levels of signalling molecules like Ap4A by hydrolyzing them to ATP and AMP. We have tracked the spatial distribution of parasitic Ap4A hydrolase in infected RBCs, and reveal its unusual localization on the infected RBC membrane in subpopulation of infected cells. Interestingly, enzyme activity assays reveal an interaction between Ap4A hydrolase and the parasite growth inhibitor suramin. We also present a high resolution crystal structure of Ap4A hydrolase in apo- and sulphate- bound state, where the sulphate resides in the enzyme active site by mimicking the phosphate of substrates like Ap4A. The unexpected infected erythrocyte localization of the parasitic Ap4A hydrolase hints at a possible role of this enzyme in purinerigic signaling. In addition, atomic structure of Ap4A hydrolase provides insights for selective drug targeting.
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The discovery of Qinghaosu (artemisinin) as an effective anti-malaria drug: A unique China story. SCIENCE CHINA-LIFE SCIENCES 2015; 59:81-8. [DOI: 10.1007/s11427-015-4988-z] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/06/2015] [Accepted: 12/09/2015] [Indexed: 12/21/2022]
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Lymphocyte Perturbations in Malawian Children with Severe and Uncomplicated Malaria. CLINICAL AND VACCINE IMMUNOLOGY : CVI 2015; 23:95-103. [PMID: 26581890 PMCID: PMC4744922 DOI: 10.1128/cvi.00564-15] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/07/2015] [Accepted: 11/13/2015] [Indexed: 11/29/2022]
Abstract
Lymphocytes are implicated in immunity and pathogenesis of severe malaria. Since lymphocyte subsets vary with age, assessment of their contribution to different etiologies can be difficult. We immunophenotyped peripheral blood from Malawian children presenting with cerebral malaria, severe malarial anemia, and uncomplicated malaria (n = 113) and healthy aparasitemic children (n = 42) in Blantyre, Malawi, and investigated lymphocyte subset counts, activation, and memory status. Children with cerebral malaria were older than those with severe malarial anemia. We found panlymphopenia in children presenting with cerebral malaria (median lymphocyte count, 2,100/μl) and uncomplicated malaria (3,700/μl), which was corrected in convalescence and was absent in severe malarial anemia (5,950/μl). Median percentages of activated CD69+ NK (73%) and γδ T (60%) cells were higher in cerebral malaria than in other malaria types. Median ratios of memory to naive CD4+ lymphocytes were higher in cerebral malaria than in uncomplicated malaria and low in severe malarial anemia. The polarized lymphocyte subset profiles of different forms of severe malaria are independent of age. In conclusion, among Malawian children cerebral malaria is characterized by lymphocyte activation and increased memory cells, consistent with immune priming. In contrast, there are reduced memory cells and less activation in severe malaria anemia. Further studies are required to understand whether these immunological profiles indicate predisposition of some children to one or another form of severe malaria.
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Siqueira-Batista R, Gomes AP, Mendonça EGD, Vitorino RR, Azevedo SFMD, Freitas RDB, Santana LA, Oliveira MGDA. Plasmodium falciparum malaria: proteomic studies. Rev Bras Ter Intensiva 2015; 24:394-400. [PMID: 23917939 PMCID: PMC4031808 DOI: 10.1590/s0103-507x2012000400017] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2012] [Accepted: 12/04/2012] [Indexed: 01/21/2023] Open
Abstract
Despite advances in treatment and campaigns for prevention and control of malaria on
the various continents where it is still rampant, this disease remains significantly
relevant to the contemporary world. Plasmodium falciparum is the
organism that is mainly responsible for severe malaria, which is characterized by
disturbances in different organs and systems, with possibly fatal outcomes. Although
incipient, proteomic studies of malaria have yielded favorable prospects for
elucidating the biological aspects of Plasmodium as well as the
pathophysiological, diagnostic, prophylactic, and therapeutic mechanisms of the
disease. Thus, the aim of the present article is to present a brief review of the
applications of proteomic analysis in P. falciparum malaria.
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49
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Oriero EC, Van Geertruyden JP, Nwakanma DC, D'Alessandro U, Jacobs J. Novel techniques and future directions in molecular diagnosis of malaria in resource-limited settings. Expert Rev Mol Diagn 2015; 15:1419-26. [PMID: 26413727 DOI: 10.1586/14737159.2015.1090878] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Despite being preventable and treatable, malaria remains a global health concern with approximately 1.2 billion people at high risk of being infected, 90% of whom are in the resource-limited settings of sub-Saharan Africa. The continued decline in malaria cases globally has rekindled the possibility of elimination in certain regions. As humans constitute the main reservoir of malaria, prompt and accurate diagnosis by microscopy or rapid diagnostic tests is part not only of effective disease management but also of control measures. However, for malaria elimination, more sensitive diagnostic tools are needed to detect asymptomatic and sub-microscopic infections that contribute to transmission. Molecular techniques, which involve amplification of nucleic acids, are being developed and modified to suit this purpose. This report provides a summary of the nucleic acid amplification tests that are currently available for diagnosis of malaria, with current improvements and adaptations for use in resource-limited settings.
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Affiliation(s)
- Eniyou Cheryll Oriero
- a 1 Medical Research Council Unit , Fajara, The Gambia.,b 2 International Health Unit, University of Antwerp , Antwerp, Belgium.,c 3 Institute of Tropical Medicine , Antwerp, Belgium
| | | | | | - Umberto D'Alessandro
- a 1 Medical Research Council Unit , Fajara, The Gambia.,c 3 Institute of Tropical Medicine , Antwerp, Belgium.,d 4 London School of Tropical Medicine and Hygiene , London, UK
| | - Jan Jacobs
- c 3 Institute of Tropical Medicine , Antwerp, Belgium.,e 5 Department of Microbiology and Immunology, University of Leuven , Leuven, Belgium
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50
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Diagana TT. Supporting malaria elimination with 21st century antimalarial agent drug discovery. Drug Discov Today 2015; 20:1265-70. [PMID: 26103616 DOI: 10.1016/j.drudis.2015.06.009] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2015] [Revised: 05/27/2015] [Accepted: 06/15/2015] [Indexed: 12/26/2022]
Abstract
The burden of malaria has been considerably reduced over recent years. However, to achieve disease elimination, drug discovery for the next generation needs to focus on blocking disease transmission and on targeting the liver-stage forms of the parasite. Properties of the 'ideal' new antimalarial drug and the key scientific and technological advances that have led to recent progress in antimalarial drug discovery are reviewed. Using these advances, Novartis has built a robust pipeline of next-generation antimalarials. The preclinical and clinical development of two candidate drugs: KAE609 and KAF156, provide a framework for the path to breakthrough treatments that could be taking us a step closer to the vision of malaria elimination.
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Affiliation(s)
- Thierry T Diagana
- Novartis Institute for Tropical Diseases, 10 Biopolis Road, #05-01 Chromos, Singapore 138670, Singapore.
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