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Li JA, He Y, Yang B, Mokrani A, Li Y, Tan C, Li Q, Liu S. Whole-genome DNA methylation profiling revealed epigenetic regulation of NF-κB signaling pathway involved in response to Vibrio alginolyticus infection in the Pacific oyster, Crassostrea gigas. FISH & SHELLFISH IMMUNOLOGY 2024; 151:109705. [PMID: 38885801 DOI: 10.1016/j.fsi.2024.109705] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2024] [Revised: 06/08/2024] [Accepted: 06/14/2024] [Indexed: 06/20/2024]
Abstract
DNA methylation, an essential epigenetic alteration, is tightly linked to a variety of biological processes, such as immune response. To identify the epigenetic regulatory mechanism in Pacific oyster (Crassostrea gigas), whole-genome bisulfite sequencing (WGBS) was conducted on C. gigas at 0 h, 6 h, and 48 h after infection with Vibrio alginolyticus. At 6 h and 48 h, a total of 11,502 and 14,196 differentially methylated regions (DMRs) were identified (p<0.05, FDR<0.001) compared to 0 h, respectively. Gene ontology (GO) analysis showed that differentially methylated genes (DMGs) were significantly enriched in various biological pathways including immunity, cytoskeleton, epigenetic modification, and metabolic processes. Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway analysis showed that transcription machinery (ko03021) is one of the most important pathways. Integrated transcriptome and methylome analyses allowed the identification of 167 and 379 DMG-related DEGs at 6 h and 48 h, respectively. These genes were significantly enriched in immune-related pathways, including nuclear factor kappa B (NF-κB) signaling pathway (ko04064) and tumor necrosis factor (TNF) signaling pathway (ko04668). Interestingly, it's observed that the NF-κB pathway could be activated jointly by TNF Receptor Associated Factor 2 (TRAF2) and Baculoviral IAP Repeat Containing 3 (BIRC3, the homolog of human BIRC2) which were regulated by DNA methylation in response to the challenge posed by V. alginolyticus infection. Through this study, we provided insightful information about the epigenetic regulation of immunity-related genes in the C. gigas, which will be valuable for the understanding of the innate immune system modulation and defense mechanism against bacterial infection in invertebrates.
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Affiliation(s)
- Jian-An Li
- Key Laboratory of Mariculture (Ocean University of China), Ministry of Education, and College of Fisheries, Ocean University of China, Qingdao, 266003, China
| | - Yameng He
- Key Laboratory of Mariculture (Ocean University of China), Ministry of Education, and College of Fisheries, Ocean University of China, Qingdao, 266003, China
| | - Ben Yang
- Key Laboratory of Mariculture (Ocean University of China), Ministry of Education, and College of Fisheries, Ocean University of China, Qingdao, 266003, China
| | - Ahmed Mokrani
- Key Laboratory of Mariculture (Ocean University of China), Ministry of Education, and College of Fisheries, Ocean University of China, Qingdao, 266003, China
| | - Yin Li
- Key Laboratory of Mariculture (Ocean University of China), Ministry of Education, and College of Fisheries, Ocean University of China, Qingdao, 266003, China
| | - Chao Tan
- Key Laboratory of Mariculture (Ocean University of China), Ministry of Education, and College of Fisheries, Ocean University of China, Qingdao, 266003, China
| | - Qi Li
- Key Laboratory of Mariculture (Ocean University of China), Ministry of Education, and College of Fisheries, Ocean University of China, Qingdao, 266003, China; Laboratory for Marine Fisheries Science and Food Production Processes, Laoshan National Laboratory, Qingdao, 266237, China
| | - Shikai Liu
- Key Laboratory of Mariculture (Ocean University of China), Ministry of Education, and College of Fisheries, Ocean University of China, Qingdao, 266003, China; Laboratory for Marine Fisheries Science and Food Production Processes, Laoshan National Laboratory, Qingdao, 266237, China.
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Cerri F, Araujo MDS, Aguirre ADAR, Evaristo GPC, Evaristo JAM, Nogueira FCS, de Medeiros JF, Dias QM. Crude saliva of Amblyomma cajennense sensu stricto (Acari: Ixodidae) reduces locomotor activity and increases the hemocyte number in the females of Aedes aegypti (Diptera: Culicidae). Exp Parasitol 2023:108570. [PMID: 37330106 DOI: 10.1016/j.exppara.2023.108570] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Revised: 06/13/2023] [Accepted: 06/14/2023] [Indexed: 06/19/2023]
Abstract
Aedes aegypti are vector insects of arboviruses such as dengue, Zika, and chikungunya. All available vector control methods have limited efficacy, highlighting the urgent need to find alternative ones. Evidence shows that arachnids like ticks are sources of biologically active compounds. Moreover, chemical modulation of the locomotor and immune systems of vector insects can be used to control arbovirus transmission. The present study evaluated the effectiveness of crude saliva of female Amblyomma cajennense sensu stricto (s.s.) ticks in reducing locomotor activity and inducing an immune response in Ae. aegypti females. Additionally, the study evaluated the protein constitution of tick saliva. For this purpose, the crude saliva obtained from several semi-engorged A. cajennense females was used. A volume of 0.2 nL of crude tick saliva was administered to mosquitoes by direct intrathoracic microinjection. The effect of the tick's saliva on the locomotor activity of the mosquito was observed using Flybox, a video-automated monitoring system, and the hemolymph hemocyte levels were quantified by reading slides under a light microscope. The protein concentration of the crude tick saliva was 1.27 μg/μL, and its electrophoretic profile indicates the presence of proteins with a molecular weight ranging between ∼17 and 95 kDa. Microplusins, ixodegrins, cystatin, actins, beta-actin, calponin, albumin, alpha-globulins, and hemoglobin were the main proteins identified by proteomics in the saliva of A. cajennense. The microinjected saliva had low toxicity for Ae. aegypti females and significantly reduced their locomotor activity, especially in the transition between the light and dark phases. The crude tick saliva did not change the period and rhythmicity of the circadian cycle. The tick saliva significantly increased the number of hemocytes two days after injection and reduced it after five days. These results suggest that further evaluation of the biological properties of tick saliva proteins against Ae. aegypti would be of interest.
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Affiliation(s)
- Fabiano Cerri
- Laboratório de Neuro e Imunofarmacologia (NIMFAR) - Fundação Oswaldo Cruz (FIOCRUZ Rondônia) - Fundação Oswaldo Cruz, Porto Velho, RO, Brazil; Universidade Federal de Rondônia - Programa de Pós-Graduação em Biologia Experimental, (PGBIOEXP), Brazil
| | - Maisa da Silva Araujo
- Laboratório de Entomologia/Plataforma de Produção e Infecção de Vetores da Malária (PIVEM) - Fundação Oswaldo Cruz (FIOCRUZ Rondônia) - Fundação Oswaldo Cruz, Porto Velho, RO, Brazil
| | - André de Abreu Rangel Aguirre
- Laboratório de Entomologia/Plataforma de Produção e Infecção de Vetores da Malária (PIVEM) - Fundação Oswaldo Cruz (FIOCRUZ Rondônia) - Fundação Oswaldo Cruz, Porto Velho, RO, Brazil
| | | | - Joseph Albert Medeiros Evaristo
- Laboratório de Proteômica, LADETEC, Instituto de Química, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Fábio César Sousa Nogueira
- Laboratório de Proteômica, LADETEC, Instituto de Química, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Jansen Fernandes de Medeiros
- Universidade Federal de Rondônia - Programa de Pós-Graduação em Biologia Experimental, (PGBIOEXP), Brazil; Laboratório de Entomologia/Plataforma de Produção e Infecção de Vetores da Malária (PIVEM) - Fundação Oswaldo Cruz (FIOCRUZ Rondônia) - Fundação Oswaldo Cruz, Porto Velho, RO, Brazil
| | - Quintino Moura Dias
- Laboratório de Neuro e Imunofarmacologia (NIMFAR) - Fundação Oswaldo Cruz (FIOCRUZ Rondônia) - Fundação Oswaldo Cruz, Porto Velho, RO, Brazil; Instituto Nacional de Ciência e Tecnologia em Neuroimunomodulação (INCT - NIM), Rio de Janeiro, RJ, Brazil; Universidade Federal de Rondônia - Programa de Pós-Graduação em Biologia Experimental, (PGBIOEXP), Brazil.
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Dang X, Lee TH, Thiyagarajan V. Wild oyster population resistance to ocean acidification adversely affected by bacterial infection. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2023; 317:120813. [PMID: 36470456 DOI: 10.1016/j.envpol.2022.120813] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2022] [Revised: 11/16/2022] [Accepted: 12/02/2022] [Indexed: 06/17/2023]
Abstract
The carbon dioxide induced ocean acidification (OA) process is well known to have profound effects on physiology, survival and immune responses in marine organisms, and particularly calcifiers including edible oysters. At the same time, some wild populations could develop a complex and sophisticated immune system to cope with multiple biotic and abiotic stresses, such as bacterial infections and OA, over the long period of coevolution with the environment. However, it is unclear how immunological responses and the underlying mechanisms are altered under the combined effect of OA and bacterial infection, especially in the ecologically and economically important edible oysters. Here, we collected the wild population of oyster species Crassostrea hongkongensis (the Hong Kong oyster) from their native estuarine area and carried out a bacterial challenge with the worldwide pervasive pathogen of human foodborne disease, Vibrio parahaemolyticus, to investigate the host immune responses and molecular mechanisms under the high-CO2 and low pH-driven OA conditions. The wild population had a high immune resistance to OA, but the resistance is compromised under the combined effect of OA and bacterial infection both in vivo or in vitro. We classified all transcriptomic genes based on expression profiles and functional pathways and identified the specifically switched on and off genes and pathways under combined effect. These genes and pathways were mainly involved in multiple immunological processes including pathogen recognition, immune signal transduction and effectors. This work would help understand how the immunological function and mechanism response to bacterial infection in wild populations and predict the dynamic distribution of human health-related pathogens to reduce the risk of foodborne disease under the future climate change scenario.
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Affiliation(s)
- Xin Dang
- The Swire Institute of Marine Science and School of Biological Sciences, Area of Ecology and Biodiversity, and State Key Laboratory of Marine Pollution, The University of Hong Kong, Hong Kong Special Administrative Region, China
| | - Tin Hang Lee
- The Swire Institute of Marine Science and School of Biological Sciences, Area of Ecology and Biodiversity, and State Key Laboratory of Marine Pollution, The University of Hong Kong, Hong Kong Special Administrative Region, China
| | - Vengatesen Thiyagarajan
- The Swire Institute of Marine Science and School of Biological Sciences, Area of Ecology and Biodiversity, and State Key Laboratory of Marine Pollution, The University of Hong Kong, Hong Kong Special Administrative Region, China.
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Ramirez Merlano JA, Almeida DV. Heterologous Production and Evaluation of the Biological Activity of Cystatin-B From the Red Piranha Pygocentrus nattereri. Front Genet 2022; 13:812971. [PMID: 35719393 PMCID: PMC9203827 DOI: 10.3389/fgene.2022.812971] [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: 11/11/2021] [Accepted: 04/21/2022] [Indexed: 11/13/2022] Open
Abstract
Cystatin proteins are known to form a superfamily of cysteine protease inhibitors, which play a key role in protein degradation and are related to different physiological processes, such as development and immunity. Currently, numerous immunoregulatory proteins, such as cystatins, are being used in the control and prevention of diseases in aquaculture. Thus, the objective of this study was to produce recombinant cystatin (rCYST-B) from the red piranha Pygocentrus nattereri and to evaluate its effect on bacterial growth. The gene that encodes cystatin-B was isolated from the spleen of P. nattereri and cloned in an expression system. The protein was produced via a heterologous system involving the yeast Pichia pastoris X-33. The inhibitory activity of purified cystatin-B was evaluated on papain using different concentrations (0–80.0 μg/μL) of rCYST-B. The bacteriostatic action of the protein was evaluated using the Kirby-Bauer method on the growth of Escherichia coli and Bacillus subtilis. rCYST-B showed 100% inhibition at a concentration of 60 μg/μL. Moreover, the bacteriostatic activity of E. coli and B. subtilis showed inhibition of 40.36 and 49.08% compared to the negative control (phosphate buffer), respectively. These results suggest that recombinant CYST-B has biotechnological potential for use in aquaculture.
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Affiliation(s)
| | - Daniela Volcan Almeida
- Laboratory of Molecular Biology, Institute of Biological Sciences, Federal University of Rio Grande, Rio Grande, Brazil
- *Correspondence: Daniela Volcan Almeida,
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Dang X, Wong NK, Xie Y, Thiyagarajan V, Mao F, Zhang X, Lin Y, Xiang Z, Li J, Xiao S, Noor Z, He Y, Zhang Y, Yu Z. Autophagy Dually Induced by AMP Surplus and Oxidative Stress Enhances Hemocyte Survival and Bactericidal Capacity via AMPK Pathway in Crassostrea hongkongensis. Front Cell Dev Biol 2020; 8:411. [PMID: 32656204 PMCID: PMC7325953 DOI: 10.3389/fcell.2020.00411] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2020] [Accepted: 05/04/2020] [Indexed: 12/12/2022] Open
Abstract
Crassostrea hongkongensis (Hong Kong oyster) is an ecologically and economically valuable shellfish endemic to South/Southeast Asia. Due to ocean acidification and warming waters, they have become increasingly vulnerable to invading microbes including Vibrio parahaemolyticus, a significant foodborne human pathogen. In recent years, outbreaks of V. parahaemolyticus have emerged as a perennial phenomenon in parts of the world, necessitating to better understand the biology of host-pathogen interactions in this under-examined marine invertebrate. Although an immunologically relevant autophagy apparatus has been identified in Crassostrea gigas, an evolutionarily close mollusk cousin, the precise mechanistic details of C. hongkongensis autophagy during V. parahaemolyticus infection are still wanting. Here, we compellingly demonstrated that in vivo V. parahaemolyticus challenge robustly triggered autophagic signaling in C. hongkongensis hemocytes peaking at 6 h post-infection, which subsequently promoted bacterial clearance and dampened premature apoptosis. Simultaneously, a large surplus of adenosine monophosphate (AMP) and elevations in reactive oxygen species (ROS, specifically mitochondrial O2– and cellular H2O2) formation were observed post-infection. Extrinsically applied AMP and ROS could synergistically induce AMP-activated protein kinase (AMPK) phosphorylation to stimulate downstream autophagic events. V. parahaemolyticus infection-induced autophagy was pharmacologically shown to be AMPK-dependent in vivo. Overall, our results establish autophagy as a crucial arm of host defense against Vibrio infections in mollusks, and provide new insights into the underappreciated roles of ROS and AMP as co-regulators of autophagy.
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Affiliation(s)
- Xin Dang
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China.,The Swire Institute of Marine Sciences, School of Biological Sciences, The University of Hong Kong, Hong Kong, China.,Southern Marine Science and Engineering Guangdong Laboratory, Guangzhou, China
| | - Nai-Kei Wong
- National Clinical Research Center for Infectious Diseases, Shenzhen Third People's Hospital, The Second Hospital Affiliated to Southern University of Science and Technology, Shenzhen, China
| | - Yongli Xie
- National Clinical Research Center for Infectious Diseases, Shenzhen Third People's Hospital, The Second Hospital Affiliated to Southern University of Science and Technology, Shenzhen, China
| | - Vengatesen Thiyagarajan
- The Swire Institute of Marine Sciences, School of Biological Sciences, The University of Hong Kong, Hong Kong, China
| | - Fan Mao
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China.,Southern Marine Science and Engineering Guangdong Laboratory, Guangzhou, China.,Innovation Academy of South China Sea Ecology and Environmental Engineering, Chinese Academy of Sciences, Guangzhou, China
| | - Xiangyu Zhang
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China.,Southern Marine Science and Engineering Guangdong Laboratory, Guangzhou, China.,Innovation Academy of South China Sea Ecology and Environmental Engineering, Chinese Academy of Sciences, Guangzhou, China
| | - Yue Lin
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China.,Southern Marine Science and Engineering Guangdong Laboratory, Guangzhou, China.,Innovation Academy of South China Sea Ecology and Environmental Engineering, Chinese Academy of Sciences, Guangzhou, China
| | - Zhiming Xiang
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China.,Southern Marine Science and Engineering Guangdong Laboratory, Guangzhou, China.,Innovation Academy of South China Sea Ecology and Environmental Engineering, Chinese Academy of Sciences, Guangzhou, China
| | - Jun Li
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China.,Southern Marine Science and Engineering Guangdong Laboratory, Guangzhou, China.,Innovation Academy of South China Sea Ecology and Environmental Engineering, Chinese Academy of Sciences, Guangzhou, China
| | - Shu Xiao
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China.,Southern Marine Science and Engineering Guangdong Laboratory, Guangzhou, China.,Innovation Academy of South China Sea Ecology and Environmental Engineering, Chinese Academy of Sciences, Guangzhou, China
| | - Zohaib Noor
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China.,Southern Marine Science and Engineering Guangdong Laboratory, Guangzhou, China
| | - Yuanqiu He
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China.,Southern Marine Science and Engineering Guangdong Laboratory, Guangzhou, China
| | - Yang Zhang
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China.,Southern Marine Science and Engineering Guangdong Laboratory, Guangzhou, China.,Innovation Academy of South China Sea Ecology and Environmental Engineering, Chinese Academy of Sciences, Guangzhou, China
| | - Ziniu Yu
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China.,Southern Marine Science and Engineering Guangdong Laboratory, Guangzhou, China.,Innovation Academy of South China Sea Ecology and Environmental Engineering, Chinese Academy of Sciences, Guangzhou, China
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Oliveira FAA, Buri MV, Rodriguez BL, Costa-da-Silva AL, Araújo HRC, Capurro ML, Lu S, Tanaka AS. The first characterization of a cystatin and a cathepsin L-like peptidase from Aedes aegypti and their possible role in DENV infection by the modulation of apoptosis. Int J Biol Macromol 2020; 146:141-149. [PMID: 31857170 DOI: 10.1016/j.ijbiomac.2019.12.010] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2019] [Revised: 11/29/2019] [Accepted: 12/02/2019] [Indexed: 11/29/2022]
Abstract
Recently, a salivary gland transcriptome study demonstrated that the transcripts of a putative cystatin gene (SeqID AAEL013287; Aacystatins) from Aedes aegypti were increased in DENV2-infected mosquitoes and that silencing of the Aacystatin gene resulted in an increase in DENV titres. In this work, Aacystatin was biochemically characterized; the purified recombinant inhibitor was able to inhibit typical cysteine proteases with a Ki in the nM range. Pulldown assays using Aag2 cell extracts identified a cathepsin L-like peptidase (AaCatL) as a possible target of Aacystatin. Purified recombinant AaCatL had an optimal pH of 5.0 and displayed a preference for Leu, Val and Phe residues at P2, which is common for other cathepsin L-like peptidases. Transcription analysis of Aacystatin and AaCatL in the salivary glands and midgut of DENV2-infected mosquitoes revealed a negative correlation between DENV2 titres and levels of the inhibitor and peptidase, suggesting their involvement in DENV2-mosquito interactions. Considering that apoptosis may play an important role during viral infections, the possible involvement of Aacystatin in staurosporine-induced apoptosis in Aag2 cells was investigated; the results showed higher expression of the inhibitor in treated cells; moreover, pre incubation with rAacystatin was able to increase Aag2 cell viability.
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Affiliation(s)
- Felipe A A Oliveira
- Department of Biochemistry, Escola Paulista de Medicina, Universidade Federal de São Paulo (UNIFESP), Brazil
| | - Marcus V Buri
- Department of Biochemistry, Escola Paulista de Medicina, Universidade Federal de São Paulo (UNIFESP), Brazil
| | - Boris L Rodriguez
- Department of Biochemistry, Escola Paulista de Medicina, Universidade Federal de São Paulo (UNIFESP), Brazil
| | - André L Costa-da-Silva
- Department of Parasitology, Instituto de Ciências Biomédicas, Universidade de São Paulo (USP), Brazil
| | - Helena R C Araújo
- Department of Parasitology, Instituto de Ciências Biomédicas, Universidade de São Paulo (USP), Brazil
| | - Margareth L Capurro
- Department of Parasitology, Instituto de Ciências Biomédicas, Universidade de São Paulo (USP), Brazil
| | - Stephen Lu
- Department of Biochemistry, Escola Paulista de Medicina, Universidade Federal de São Paulo (UNIFESP), Brazil.
| | - Aparecida S Tanaka
- Department of Biochemistry, Escola Paulista de Medicina, Universidade Federal de São Paulo (UNIFESP), Brazil.
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