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Dias SC, de Brida AL, Jean-Baptiste MC, Leite LG, Ovruski SM, Garcia FRM. Pathogenicity and Virulence of Different Concentrations of Brazilian Isolates of Entomopathogenic Nematodes Against Drosophila suzukii. Neotrop Entomol 2023; 52:986-992. [PMID: 37495767 DOI: 10.1007/s13744-023-01065-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Accepted: 06/26/2023] [Indexed: 07/28/2023]
Abstract
The invasive pest Drosophila suzukii (Matsumura) (Diptera: Drosophilidae) was recently recorded in Brazil and constitutes a threat to fruit growing, mainly for small, soft fruits. Recent advances in research on ways of controlling D. suzukii involve the use of entomopathogenic nematodes (EPNs). In this context, the objective of this study was to evaluate the pathogenicity and virulence of four isolates in different concentrations against D. suzukii pupae. The EPN isolates used in trials were Steinernema brazilense IBCBn 06, S. carpocapsae IBCBn 02, Heterorhabditis bacteriophora HB, and H. amazonensis IBCBn 24. Both H. amazonensis IBCBn 24 and H. bacteriophora HB were effective in controlling D. suzukii as they caused a mortality rate of 86.25% and 80.0%, and virulence of 549.75 IJs/pupae and 787.75 IJs/pupae in the concentrations of 1800 IJs/ml and 5400 IJs/ml, respectively. The lowest lethal concentrations (LC50) of juveniles were found in host pupae with 771.63 IJs/ml of H. bacteriophora HB and 1115.49 IJs/ml of H. amazonensis IBCBn 24. Results showed that both EPNs, H. amazonensis IBCBn 24 and H. bacteriophora HB, could be promising eco-friendly biological agents to control D. suzukii.
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Affiliation(s)
- Sérgio Costa Dias
- Departamento de Ecologia de Insetos, Zoologia E Genética Do Instituto de Biologia da Universidade Federal de Pelotas, Universidade Federal de Pelotas (UFPel), Pelotas, Rio Grande Do Sul, Brazil
| | - Andressa Lima de Brida
- Departamento de Ecologia de Insetos, Zoologia E Genética Do Instituto de Biologia da Universidade Federal de Pelotas, Universidade Federal de Pelotas (UFPel), Pelotas, Rio Grande Do Sul, Brazil
| | | | | | - Sergio M Ovruski
- Planta Piloto de Procesos Industriales Microbiológicos Y Biotecnología (PROIMI-CONICET), División Control Biológico, San Miguel de Tucumán, Argentina
| | - Flavio Roberto Mello Garcia
- Departamento de Ecologia de Insetos, Zoologia E Genética Do Instituto de Biologia da Universidade Federal de Pelotas, Universidade Federal de Pelotas (UFPel), Pelotas, Rio Grande Do Sul, Brazil.
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Maximiano MR, Miranda VJ, de Barros EG, Dias SC. Validation of an in vitro system to trigger changes in the gene expression of effectors of Sclerotinia sclerotiorum. J Appl Microbiol 2021; 131:885-897. [PMID: 33331046 DOI: 10.1111/jam.14973] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Revised: 12/11/2020] [Accepted: 12/12/2020] [Indexed: 11/27/2022]
Abstract
AIMS Sclerotinia sclerotiorum, the causal agent of white mold, can infect several host species, including economically important crops. In this study, we propose and validate a new in vitro system able to mimic the conditions of interaction with the host and promote the induction of S. sclerotiorum effectors. METHODS AND RESULTS For culture media production, we selected three plant species, common bean (Phaseolus vulgaris L, cv. Requinte.), maize (Zea mays, cv. BRS1030) and beggarticks (Bidens pilosa). To validate this system as an in vitro inducer of effectors, the qRT-PCR technique was used to investigate the expression profile of some S. sclerotiorum effector genes in each growth medium at different times after inoculation. CONCLUSION The results obtained in this study provide a validation of a new method to study S. sclerotiorum during mimetic interaction with different hosts. Although leaf extract does not fully represent the plant environment, the presence of plant components in the culture medium seems to induce effector genes, mimicking in planta conditions. The use of MEVM is simpler than in planta growth, bypasses problems such as the amount of mycelium produced, as well as contamination of host cells during transcriptomic and proteomic analyses. SIGNIFICANCE AND IMPACT OF THE STUDY We have devised MEVM media as a model mimicking the interaction of S. sclerotiorum and its hosts and used it to evaluate in vitro expression of effectors normally expressed only in planta.
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Affiliation(s)
- M R Maximiano
- Centro de Análises Proteômicas e Bioquímicas, Programa de Pós-Graduação em Ciências Genômicas e Biotecnologia, Universidade Católica de Brasília, Brasília, Distrito Federal, Brazil
| | - V J Miranda
- Centro de Análises Proteômicas e Bioquímicas, Programa de Pós-Graduação em Ciências Genômicas e Biotecnologia, Universidade Católica de Brasília, Brasília, Distrito Federal, Brazil
| | - E G de Barros
- Centro de Análises Proteômicas e Bioquímicas, Programa de Pós-Graduação em Ciências Genômicas e Biotecnologia, Universidade Católica de Brasília, Brasília, Distrito Federal, Brazil
| | - S C Dias
- Centro de Análises Proteômicas e Bioquímicas, Programa de Pós-Graduação em Ciências Genômicas e Biotecnologia, Universidade Católica de Brasília, Brasília, Distrito Federal, Brazil
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Lima LA, de Vries R, Biswaro LS, Vasconcelos IM, Franco OL, Dias SC. Fusion of plectasin derivative NZ2114 with hydrophilic random coil polypeptide: Recombinant production in Pichia pastoris and antimicrobial activity against clinical strain MRSA. Biopolymers 2017; 110. [PMID: 28608428 DOI: 10.1002/bip.23034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2016] [Revised: 04/27/2017] [Accepted: 05/30/2017] [Indexed: 11/06/2022]
Abstract
One of the roadblocks towards the practical use of antimicrobial peptides for medical use is their relatively high cost when synthesized chemically. Effective recombinant production has only been successful in some cases, such as the previously reported production in Pichia pastoris of the antimicrobial plectasin derivative peptide NZ2114. The same production host has also been used extensively to produce so-called protein-polymers: sequences that consist of repetitions of simple amino acid motifs found in structural proteins such as collagen and elastin, and that can be designed to self-assemble in micelles, fibers and hydrogels. With the eventual goal of producing recombinant biomaterials such as antimicrobial protein polymer, we here explore the secreted production in Pichia pastoris of a fusion of NZ2114 with a hydrophilic random coil protein polymer CP4 . The intact NZ2114-CP4 fusion copolymer was produced with a yield of purified protein on the order of 1 g.L-1 supernatant. We find that purified NZ2114-CP4 has an activity against clinical strain MRSA, but very much lower than activity of chemically synthesized NZ2114. We conclude that possibly, the activity of NZ2114 is impaired by the C-terminal attachment to the protein polymer chain, but other reasons for the low activity cannot yet be excluded either. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- L A Lima
- Centro de Análises, Proteômicas e Bioquímicas, Programa de Pós Graduação em Ciências Genômicas e Biotecnologia, Universidade Católica de Brasília, Brasília, Brazil
| | - R de Vries
- Physical Chemistry and Soft Matter, Wageningen University Stippeneng 4, 6708 WE Wageningen, The Netherlands
| | - L S Biswaro
- Centro de Análises, Proteômicas e Bioquímicas, Programa de Pós Graduação em Ciências Genômicas e Biotecnologia, Universidade Católica de Brasília, Brasília, Brazil
| | - I M Vasconcelos
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal do Ceará, Fortaleza, Brazil
| | - O L Franco
- Centro de Análises, Proteômicas e Bioquímicas, Programa de Pós Graduação em Ciências Genômicas e Biotecnologia, Universidade Católica de Brasília, Brasília, Brazil
- S-Inova, Pós-Graduação em Biotecnologia, Universidade Católica Dom Bosco, Campo Grande, Mato Grosso do Sul, Brazil
| | - S C Dias
- Centro de Análises, Proteômicas e Bioquímicas, Programa de Pós Graduação em Ciências Genômicas e Biotecnologia, Universidade Católica de Brasília, Brasília, Brazil
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Moriggi R, Mauro HD, Dias SC, Matos JM, Urtado MB, Camarço NF, Neto IS, Nascimento DC, Tibana RA, Assumpção CO, Prestes J, Urtado CB. Similar hypotensive responses to resistance exercise with and without blood flow restriction. Biol Sport 2015; 32:289-94. [PMID: 26681830 PMCID: PMC4672159 DOI: 10.5604/20831862.1163691] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2014] [Revised: 03/22/2015] [Accepted: 05/13/2015] [Indexed: 12/05/2022] Open
Abstract
Low intensity resistance exercise (RE) with blood flow restriction (BFR) has gained attention in the literature due to the beneficial effects on functional and morphological variables, similar to those observed during traditional RE without BFR, while the effects of BFR on post-exercise hypotension remain unclear. The aim of the present study was to compare the blood pressure (BP) response of trained normotensive individuals to RE with and without BFR. In this cross-over randomized trial, eight male subjects (23.8 ± 4 years, 74 ± 3 kg, 174 ± 4 cm) completed two exercise protocols: traditional RE (3 x 10 repetitions at 70% one-repetition maximum [1-RM]) and low intensity RE (3 x 15 repetitions at 20% 1-RM) with BFR. Blood pressure measurements were performed after 15 min of seated rest (0), immediately after and 10 min, 20 min, 30 min, 40 min, 50 min and 60 min after the experimental sessions. Similar hypotensive effects for systolic BP (SBP) were observed for both protocols (P < 0.05) after exercise, with no differences between groups (P > 0.05) and no statistically significant difference for diastolic BP (P > 0.05). These results suggest that in normotensive trained individuals, both traditional RE and RE with BFR induce hypotension for SBP, which is important to prevent cardiovascular disturbances.
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Affiliation(s)
- R Moriggi
- Graduation Program on Physical Education, State University of Campinas, São Paulo, Brazil; Faculty Politec/UNIESP, Santa Bárbara D'Oeste, São Paulo, Brazil
| | - Hs Di Mauro
- Faculty Politec/UNIESP, Santa Bárbara D'Oeste, São Paulo, Brazil
| | - S C Dias
- United Metropolitan Colleges of São Paulo, São Paulo, Brazil; Faculty Politec/UNIESP, Santa Bárbara D'Oeste, São Paulo, Brasil
| | - J M Matos
- University Estácio de Sa, São Paulo, Brazil; Faculty Politec/UNIESP, Santa Bárbara D'Oeste, São Paulo, Brasil
| | - M B Urtado
- Laboratory of Orofacial Pain, Division of Oral Physiology, Piracicaba Dental School, State University of Campinas, Piracicaba, São Paulo, Brazil
| | - N F Camarço
- Graduation Program on Physical Education, Catholic University of Brasília, Brasília Brazil
| | - Iv Sousa Neto
- Graduation Program on Physical Education, Catholic University of Brasília, Brasília Brazil
| | - D C Nascimento
- Graduation Program on Physical Education, Catholic University of Brasília, Brasília Brazil
| | - R A Tibana
- Graduation Program on Physical Education, Catholic University of Brasília, Brasília Brazil
| | - C O Assumpção
- Human Performance Laboratory, Physical Education Department, São Paulo State University, Rio Claro, São Paulo, Brazil
| | - J Prestes
- Graduation Program on Physical Education, Catholic University of Brasília, Brasília Brazil
| | - C B Urtado
- Center for Investigation in Pediatrics, Faculty of Medical Sciences, State University of Campinas, Campinas, SP; Faculty Politec/UNIESP, Santa Bárbara D'Oeste, São Paulo, Brazil
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Silva FB, Monteiro ACS, Del Sarto RP, Marra BM, Dias SC, Figueira ELZ, Oliveira GR, Rocha TL, Souza DSL, da Silva MCM, Franco OL, Grossi-de-Sa MF. Proregion of Acanthoscelides obtectus cysteine proteinase: a novel peptide with enhanced selectivity toward endogenous enzymes. Peptides 2007; 28:1292-8. [PMID: 17485144 DOI: 10.1016/j.peptides.2007.03.020] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/23/2007] [Revised: 03/21/2007] [Accepted: 03/22/2007] [Indexed: 11/29/2022]
Abstract
Acanthoscelides obtectus is a devastating storage insect pest capable of causing severe bean crop losses. In order to maintain their own development, insect pest larvae feed continuously, synthesizing efficient digestive enzymes. Among them, cysteine proteinases (CPs) are commonly produced as inactive precursors (procysteines), requiring a cleavage of the peptide proregion to become active. The proregion fits tightly into the active site of procysteines, efficiently preventing their activity. In this report, a CP cDNA (cpao) was isolated from A. obtectus midgut larvae. In silico studies indicated that the complete CP sequence contains a hydrophobic signal peptide, a prodomain and a conserved catalytic region. Moreover, the encoding cDNA contains 963bp translating into a 321 residue protein, CPAo, which was expressed in E. coli, fused with thioredoxin. Enzymatic assays using the recombinant protein revealed that the enzyme was catalytically active, being able to cleave the synthetic substrate Z-Phe-Arg-7-AMC. Additionally, this report also focuses the cpao propeptide (PCPAo) subcloning and expression. The expressed propeptide efficiently inhibited CPAo, as well as digestive CP of other bean bruchids. Little or no activity was found against proteolytic enzymes of two other coleopterans: Rhyzopertha dominica and Anthonomus grandis. The data reported here indicate the possibility of endogenous propeptides as a novel strategy on bruchids control, which could be applicable to bean improvement programs.
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Affiliation(s)
- F B Silva
- Embrapa Recursos Genéticos e Biotecnologia, Brasília-DF 70770-900, Brazil
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Dias SC, Santos BA, Werneck FP, Lira PK, Carrasco-Carbadillo V, Fernandes GW. Efficiency of prey subjugation by one species of Myrmeleon larvae (Neuroptera: Myrmeleontidae) in the central Amazonia. BRAZ J BIOL 2006; 66:441-2. [PMID: 16862297 DOI: 10.1590/s1519-69842006000300008] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Affiliation(s)
- S C Dias
- Laboratório de Aracnologia, Museu Paraense Emílio Goeldi, Belém, PA, 66017-970, Brazil.
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Dias SC, Sagardoy MA. Influence of pH on the toxicity and survival of total cells and spores of Bacillus thuringiensis. Rev Argent Microbiol 1998; 30:122-9. [PMID: 9793141] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2023] Open
Abstract
B. thuringiensis (Bt) is one of the most important microorganism among those studied because of their entomopathogenic potential against insect plagues and vectors. In this work, the pathogenicity and survival of total cells and spores of three autochthonous strains of B. thuringiensis isolated from Argentine soils (A61, A27 and A68) and the commercial strain HD-1 were studied at different ion hidrogen concentrations (pH = 4.4; 5.4; 7.4; 8.4; 9.4 and 10.4) under laboratory conditions. The greatest antimicrobial effect on the number of spores and total cells was observed at pH 4.4 with a great decrease after 72 hours' growth. Comparing the survival percentage of total cells and spores; pH 5.4 was the one which allowed the higher relative tolerance (survival) among the studied strains. No decrease in pathogenicity was observed in the investigated serotypes at different pHs in bioassays against Cydia pomonella. Two soil strains of Bt (A61/A27) and the Bt (HD-1) of commercial origin caused the highest mortality of the target insect. The sotto serotype (A68), however, did not produce this effect.
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Affiliation(s)
- S C Dias
- Departamento de Agronomía, Universidad Nacional del Sur, Bahía Blanca, Argentina.
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