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Zhong J, Fox EGP, Ling S, Yan Z, Xu J, Yang H, Hong Z, Qin C, Qiu H. Bioactivities of scent gland chemicals from Mictis fuscipes Hsiao (Hemiptera: Coreidae) on Solenopsis invicta Buren (Hymenoptera: Formicidae). Pest Manag Sci 2024. [PMID: 38411441 DOI: 10.1002/ps.7997] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2023] [Revised: 01/22/2024] [Accepted: 01/25/2024] [Indexed: 02/28/2024]
Abstract
BACKGROUND Given the chemical diversity within stink bugs scent glands, they can be convenient models for bioprospecting novel pest control products. Preliminary behaviour observations indicated that adult Mictis fuscipes stink bugs secrete liquid droplets when defending against Solenopsis invicta fire ants, killing them within minutes. Hence, this study aimed to analyse the chemical composition of the metathoracic scent gland secretions of M. fuscipes adults, as well as assess their biological activities against fire ants. RESULTS Bioassaying fire ants against secretions of several local stink bugs confirmed that the defensive secretions of two Mictis species are significantly more lethal, where M. fuscipes was the most lethal. Volatiles chromatography analysis indicated the secretions of female and male M. fuscipes stink bugs contains 20 and 26 components, respectively, chiefly hexanoic acid and hexyl hexanoate. Five compounds were consistently present in the secretion of female adults: hexyl hexanoate, hexanoic acid, hexyl acetate, hexyl butyrate, and eugenol. These yielded a strong electrophysiological antennal (EAD) response from S. invicta workers, female alates and males, where hexyl acetate showed the strongest response. The combination of these five compounds proved strongly repellent to S. invicta. When tested singly, hexanoic acid, hexyl butyrate, hexyl hexanoate, and eugenol were repellent to S. invicta, but hexyl acetate seemed slightly attractive. Additionally, the same mixture of five components exhibited strong contact and fumigant toxicity towards S. invicta workers, eugenol being the strongest. CONCLUSION Defensive chemicals of M. fuscipes exhibit robust biological activity against S. invicta and could inspire the development of biopesticides. © 2024 Society of Chemical Industry.
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Affiliation(s)
- Jiamei Zhong
- Guangdong Provincial Key Laboratory of Silviculture, Protection and Utilization/Guangdong Academy of Forestry, Guangzhou, China
- College of Life Science, Nanchang University, Nanchang, China
| | - Eduardo G P Fox
- Programa de Pós-Graduação em Ambiente e Sociedade (PPGAS), Universidade Estadual de Goiás (UEG), Quirinópolis, Brazil
| | - Siquan Ling
- Guangdong Provincial Key Laboratory of Silviculture, Protection and Utilization/Guangdong Academy of Forestry, Guangzhou, China
| | - Zheng Yan
- State Key Laboratory of Grassland Agro-Ecosystems and College of Ecology, Lanzhou University, Lanzhou, China
| | - Jinzhu Xu
- Guangdong Provincial Key Laboratory of Silviculture, Protection and Utilization/Guangdong Academy of Forestry, Guangzhou, China
| | - Hua Yang
- Guangdong Provincial Key Laboratory of Silviculture, Protection and Utilization/Guangdong Academy of Forestry, Guangzhou, China
| | - Ziqiong Hong
- Guangdong Provincial Key Laboratory of Silviculture, Protection and Utilization/Guangdong Academy of Forestry, Guangzhou, China
| | - Changsheng Qin
- Guangdong Provincial Key Laboratory of Silviculture, Protection and Utilization/Guangdong Academy of Forestry, Guangzhou, China
| | - Hualong Qiu
- Guangdong Provincial Key Laboratory of Silviculture, Protection and Utilization/Guangdong Academy of Forestry, Guangzhou, China
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Wu F, Liu L, Fox EGP, Deng X, Xu M, Zheng Z, Li X, Fu J, Zhu H, Huang J, Deng T. Physiological Variables Influenced by ' Candidatus Liberibacter asiaticus' Infection in Two Citrus Species. Plant Dis 2023:PDIS08221747RE. [PMID: 36399004 DOI: 10.1094/pdis-08-22-1747-re] [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] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
'Candidatus Liberibacter asiaticus' is the bacterium associated with the citrus disease known as huanglongbing (HLB). This study evaluated the influence of 'Ca. L. asiaticus' infection on a number of key plant physiological variables concerning photosynthesis, cell integrity, reactive oxygen species scavengers' activity, and osmoregulation of two different species of citrus-the pomelo Citrus maxima and the mandarin C. reticulata 'Tankan'-relative to their measured 'Ca. L. asiaticus' infection load. Results indicated that all measured physiological variables except soluble sugar were affected by increased 'Ca. L. asiaticus' infection titers, wherein the variety C. maxima proved overall more resistant than C. reticulata. 'Ca. L. asiaticus' infection was linked in both plants to decrease in chlorophyll concentration, cell membrane permeability, and malondialdehyde, as well as increased free proline and starch contents. Chlorophyll fluorescence measurements taken 9 months after grafting the mandarin C. reticulata with 'Ca. L. asiaticus' scions revealed a significant decrease in the photosynthesis variables maximum photochemical quantum yield of photosystem II (PSII), effective photochemical quantum yield of PSII, and coefficient of photochemical fluorescence quenching assuming interconnected PSII antennae, whereas nonphotochemical fluorescence quenching increased significantly; C. maxima plants, on the other hand, did not show significant differences until the 12th month from infection exposure. The variables superoxide dismutase, catalase, peroxidase, and soluble protein initially increased and later decreased. In addition, progression of 'Ca. L. asiaticus' replication in both citrus species was accompanied by rapid changes in three reactive oxygen species scavenging enzymes in C. maxima, while the pattern was different in C. reticulata. We hypothesize that the observed interspecific differences in physiological change are related to their relative resistance against 'Ca. L. asiaticus' infection. These results provide a scaffold for better describing the pathogenesis, selecting the most resistant breeds, or even validating pertaining omics research; ultimately, these detailed observations can facilitate the diagnosis of 'Ca. L. asiaticus' infection.
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Affiliation(s)
- Fengnian Wu
- School of Life Sciences and Food Engineering, Hanshan Normal University, Chaozhou 521041, China
| | - Lihui Liu
- Guangxi Key Laboratory of Biology for Crop Diseases and Insect Pests/Plant Protection Research Institute, Guangxi Academy of Agricultural Sciences, Nanning 530007, China
| | - Eduardo G P Fox
- Programa de Pós-Graduação em Ambiente e Sociedade (PPGAS), Universidade Estadual de Goiás (UEG), Goiás 75860-000, Brazil
| | - Xiaoling Deng
- Citrus Huanglongbing Research Laboratory, South China Agricultural University, Guangzhou 510642, China
| | - Meirong Xu
- Citrus Huanglongbing Research Laboratory, South China Agricultural University, Guangzhou 510642, China
| | - Zheng Zheng
- Citrus Huanglongbing Research Laboratory, South China Agricultural University, Guangzhou 510642, China
| | - Xiuhong Li
- School of Life Sciences and Food Engineering, Hanshan Normal University, Chaozhou 521041, China
| | - Jiawei Fu
- School of Life Sciences and Food Engineering, Hanshan Normal University, Chaozhou 521041, China
| | - Hui Zhu
- School of Life Sciences and Food Engineering, Hanshan Normal University, Chaozhou 521041, China
| | - Jianjian Huang
- School of Life Sciences and Food Engineering, Hanshan Normal University, Chaozhou 521041, China
| | - Tiejun Deng
- Guangxi Key Laboratory of Biology for Crop Diseases and Insect Pests/Plant Protection Research Institute, Guangxi Academy of Agricultural Sciences, Nanning 530007, China
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Qiu HL, Fox EGP, Qin CS, Yang H, Tian LY, Wang DS, Xu JZ. First record of Fusarium concentricum (Hypocreales: Hypocreaceae) isolated from the moth Polychrosis cunninhamiacola (Lepidoptera: Tortricidae) as an entomopathogenic fungus. J Insect Sci 2023; 23:2. [PMID: 36916278 PMCID: PMC10011878 DOI: 10.1093/jisesa/iead008] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Revised: 01/29/2023] [Accepted: 02/01/2023] [Indexed: 06/18/2023]
Abstract
Fusarium concentricum Nirenberg & O' Donnell (Ascomycota: Hypocreales) is a fungal species known to infect plants, but never reported as entomopathogenic. Polychrosis cunninhamiacola Liu et Pei (Lepidoptera: Tortricidae: Olethreutinae) is a major and widespread insect pest causing economic losses to cultivated Chinese fir Cunninghamia lanceolata (Lamb.) Hook. It is routinely controlled by extensive use of chemical insecticides, which is perceived as environmentally unsustainable. During March and April of 2019-2020, muscardine cadavers of larvae and pupae of P. cunninhamiacola infected with growing fungus were collected in a fir forest in northern Guangdong Province, China. Conidia were isolated and cultured on PDA medium, from which the fungal strain was identified as F. concentricum FCPC-L01 by morphology and by sequence alignment match with Tef-1α gene. Pathogenicity bioassays at the conidial concentration 1 × 107 revealed P. cunninhamiacola adults and Danaus chrysippus (L.) (Lepidoptera: Nymphalidae) larvae are sensitive to the fungal infection, but not the fire ant Solenopsis invicta Buren (Hymenoptera: Formicidae). We believe results indicate this fungal strain might be applicable against specific target insect pests. As this is the first record of a natural infection caused by F. concentricum in insects, we propose host specificity tests should be done to evaluate its potential as a biocontrol agent.
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Affiliation(s)
- Hua-Long Qiu
- Guangdong Provincial Key Laboratory of Silviculture, Protection and Utilization/Guangdong Academy of Forestry, Guangzhou 510520, China
| | - Eduardo G P Fox
- Programa de Pós-Graduação em Ambiente e Sociedade (PPGAS), Universidade Estadual de Goiás (UEG), Quirinópolis, Goiás 75860-000, Brazil
| | - Chang-Sheng Qin
- Guangdong Provincial Key Laboratory of Silviculture, Protection and Utilization/Guangdong Academy of Forestry, Guangzhou 510520, China
| | - Hua Yang
- Guangdong Provincial Key Laboratory of Silviculture, Protection and Utilization/Guangdong Academy of Forestry, Guangzhou 510520, China
| | - Long-Yan Tian
- Guangdong Provincial Key Laboratory of Silviculture, Protection and Utilization/Guangdong Academy of Forestry, Guangzhou 510520, China
| | - De-Sen Wang
- Department of Entomology, South China Agricultural University, Guangzhou 510642, China
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Wu F, Huang M, Fox EGP, Huang J, Cen Y, Deng X, Xu M. Preliminary Report on the Acquisition, Persistence, and Potential Transmission of Citrus tristeza virus by Diaphorina citri. Insects 2021; 12:insects12080735. [PMID: 34442301 PMCID: PMC8396932 DOI: 10.3390/insects12080735] [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] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/25/2021] [Revised: 08/10/2021] [Accepted: 08/12/2021] [Indexed: 11/29/2022]
Abstract
Simple Summary Citrus tristeza virus (CTV) is the causal agent of one of the most serious diseases of citrus and is described to be vectored by several aphid species. There have been no published reports of either acquisition or transmission of CTV by other insects, including phloem-feeding sternorrhynchans. The Asian citrus psyllid Diaphorina citri is an economically important pest since it is the vector of the bacterium associated with Huanglongbing (HLB) in citrus crops. We hereby reported the detection of CTV from field-collected D. citri and estimated the ability of these insects to acquire and transmit the virus. Under controlled conditions, D. citri nymphs were shown to acquire CTV from citrus trees, and the virus persisted in the psyllids for over 15 days. Controlled experiments also suggest that D. citri transmit CTV to healthy citrus plants but not to orange jasmine plants, a favorite host of D. citri. The results indicate D. citri is a potential vector of pathogens for two major citrus diseases: HLB and Citrus tristeza. Abstract Citrus tristeza virus (CTV) is one of the most important citrus tree viruses: a graft-transmissible virus that can be vectored by several aphid species. Diaphorina citri is the insect vector of “Candidatus Liberibacter spp.”, a bacterium associated with citrus Huanglongbing (HLB). However, no detailed description of the relationship between CTV and D. citri has been reported. In this study, D. citri adults collected from CTV-infected “Shatangju” mandarin, “Newhall” sweet orange, and “fingered citron” trees in different orchards yielded CTV-positive rates of 40%, 65%, and 95%, respectively, upon detection by conventional PCR. Illumina HiSeq sequencing followed by de novo assembly recovered the primary full CTV genome from the RNA of 30 D. citri adults sampled from CTV-positive citrus plants. Molting and adult emergence did not affect the presence or titers of CTV within the D. citri; however, the persistence of CTV in psyllids varied among different host plant species. Groups of 10 D. citri (from a population 85% CTV-positive) were shown to potentially transmit CTV to two citrus species, “Shatangju” mandarin and “Eureka” lemon, yielding 58.33% and 83.33% CTV-positive plants, respectively. No transmission of CTV to orange jasmine plants occurred. Thus, this study reports on the ability of D. citri to acquire and transmit CTV, making D. citri as a vector of two important citrus pathogens, warranting further attention and investigation.
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Affiliation(s)
- Fengnian Wu
- Guangdong Province Key Laboratory of Microbial Signals and Disease Control/Citrus Huanglongbing Research Laboratory, South China Agricultural University, Guangzhou 510642, China; (F.W.); (M.H.); (J.H.); (Y.C.)
- School of Food Engineering and Biotechnology, Hanshan Normal University, Chaozhou 521041, China
| | - Mochi Huang
- Guangdong Province Key Laboratory of Microbial Signals and Disease Control/Citrus Huanglongbing Research Laboratory, South China Agricultural University, Guangzhou 510642, China; (F.W.); (M.H.); (J.H.); (Y.C.)
| | - Eduardo G. P. Fox
- Instituto de Biofísica Carlos Chagas Filho, Centro de Ciências da Saúde, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-902, Brazil;
| | - Jiaquan Huang
- Guangdong Province Key Laboratory of Microbial Signals and Disease Control/Citrus Huanglongbing Research Laboratory, South China Agricultural University, Guangzhou 510642, China; (F.W.); (M.H.); (J.H.); (Y.C.)
| | - Yijing Cen
- Guangdong Province Key Laboratory of Microbial Signals and Disease Control/Citrus Huanglongbing Research Laboratory, South China Agricultural University, Guangzhou 510642, China; (F.W.); (M.H.); (J.H.); (Y.C.)
| | - Xiaoling Deng
- Guangdong Province Key Laboratory of Microbial Signals and Disease Control/Citrus Huanglongbing Research Laboratory, South China Agricultural University, Guangzhou 510642, China; (F.W.); (M.H.); (J.H.); (Y.C.)
- Correspondence: (X.D.); (M.X.)
| | - Meirong Xu
- Guangdong Province Key Laboratory of Microbial Signals and Disease Control/Citrus Huanglongbing Research Laboratory, South China Agricultural University, Guangzhou 510642, China; (F.W.); (M.H.); (J.H.); (Y.C.)
- Correspondence: (X.D.); (M.X.)
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Lian T, Qiu HL, Qin CS, Fox EGP, Zhao DY, Fang TS, Yang H, Tian LY, Xu JZ. Metarhizium Entomopathogenic Fungi Against the Beetle Brontispa longissima (Coleoptera: Hispidae): Isolation and Species Identification. Environ Entomol 2021; 50:160-166. [PMID: 33381806 DOI: 10.1093/ee/nvaa156] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2020] [Indexed: 06/12/2023]
Abstract
Seven entomopathogenic fungi strains (M1-7) were isolated from field-obtained dead coconut hispine beetles Brontispa longissima (Gestro), identified to species, and bioassayed for their pathogenicity. According to ITS sequences, all isolates belong in the genus Metarhizium, mainly M. flavoviride and M. anisopliae. Measured median lethal times (LT50) of 1×107 conidia/ml of M1-7 against fourth-instar B. longissima larvae within 15 d following exposure were, respectively: 5.43, 10.64, 11.26, 10.93, 6.62, 4.73, and 5.95 d. The isolate M6 yielded the highest mortality to fourth-instar larvae, and was thus selected to be tested against other larval instars and adults of B. longissima, after Time-Dose-Mortality (TDM) models. M6 proved more pathogenic against larvae than adults. The obtained bioassays data produced a good fit to the TDM models, yielding estimated LC50 and LT50 for each of the tested developmental stages of B. longissima. Both the obtained dose (β) and time effect (ri) parameters from TDM models suggest that first-instar larvae are the most susceptible life stage of the pest insect, while adults are more resistant to M6 infection. Calculated LC50 values were, respectively, 1.23×103 and 1.15×106 conidia/ml for first-instar larvae and adults, on the 15th day following M6 inoculation. Estimated LT50 were 3.3 and 5.9 d for first-instar larvae and adults, respectively, at 1×108 conidia/ml. Taken together, these results would suggest Metarhizium M6 as an option for the biological control of B. longissima in the field.
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Affiliation(s)
- Tao Lian
- Guangdong Provincial Key Laboratory of Silviculture, Protection and Utilization/Guangdong Academy of Forestry, Guangzhou, China
| | - Hua-Long Qiu
- Guangdong Provincial Key Laboratory of Silviculture, Protection and Utilization/Guangdong Academy of Forestry, Guangzhou, China
| | - Chang-Sheng Qin
- Guangdong Provincial Key Laboratory of Silviculture, Protection and Utilization/Guangdong Academy of Forestry, Guangzhou, China
| | - Eduardo G P Fox
- Departamento de Parasitologia, Instituto de Biofísica Carlos, Chagas Filho (IBCCF), Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Dan-Yang Zhao
- Guangdong Provincial Key Laboratory of Silviculture, Protection and Utilization/Guangdong Academy of Forestry, Guangzhou, China
| | - Tian-Song Fang
- Guangdong Forest Resources Conservation Center, Guangzhou, China
| | - Hua Yang
- Guangdong Provincial Key Laboratory of Silviculture, Protection and Utilization/Guangdong Academy of Forestry, Guangzhou, China
| | - Long-Yan Tian
- Guangdong Provincial Key Laboratory of Silviculture, Protection and Utilization/Guangdong Academy of Forestry, Guangzhou, China
| | - Jin-Zhu Xu
- Guangdong Provincial Key Laboratory of Silviculture, Protection and Utilization/Guangdong Academy of Forestry, Guangzhou, China
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Qiu HL, Qin CS, Fox EGP, Wang DS, He YR. Differential Behavioral Responses of Solenopsis invicta (Hymenoptera: Formicidae) Workers Toward Nestmate and Non-Nestmate Corpses. J Insect Sci 2020; 20:5877675. [PMID: 32725158 PMCID: PMC7387867 DOI: 10.1093/jisesa/ieaa069] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/05/2020] [Indexed: 06/11/2023]
Abstract
The removal of corpses (aka 'necrophoric behavior') is critical to sanitation in ant colonies. However, little is known about differences in the necrophoric responses of Solenopsis invicta workers towards corpses of nestmates and non-nestmates. We introduced corpses of S. invicta workers from either intracolony (i.e., nestmate) or intercolony (i.e., non-nestmate) origin at the entrance of artificial nests, and recorded workers' aggressive responses and necrophoric behaviors for analysis. Solenopsis invicta workers displayed distinct responses towards corpses of different origins. Specifically, resident workers were more likely to remove fresh non-nestmate corpses than nestmate corpses, but there was no difference regarding corpses that had been dead for 15 min or longer. Resident workers reacted more aggressively to, and removed more quickly, fresh non-nestmate corpses than corpses of their nestmates. On the other hand, there was no significant difference in the removal time between nestmate and non-nestmate corpses that had been dead for 15 min or longer. Resident workers always displayed stronger aggressiveness towards non-nestmate corpses than nestmate corpses, excepting to corpses that had been dead for 6 h, which elicited a response. No significant correlation between the removal times and aggressiveness levels were detected in any treatments. It remains to be tested whether this differential response is adaptive in how it influences colony fitness and competition.
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Affiliation(s)
- Hua-Long Qiu
- Guangdong Provincial Key Laboratory of Silviculture, Protection and Utilization/Guangdong Academy of Forestry, Guangzhou, Guangdong, China
| | - Chang-Sheng Qin
- Guangdong Provincial Key Laboratory of Silviculture, Protection and Utilization/Guangdong Academy of Forestry, Guangzhou, Guangdong, China
| | - Eduardo G P Fox
- Instituto de Biofísica Carlos Chagas Filho, Centro de Ciências da Saúde, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - De-Sen Wang
- College of Agriculture, South China Agricultural University, Guangdong, Guangzhou, China
| | - Yu-Rong He
- College of Agriculture, South China Agricultural University, Guangdong, Guangzhou, China
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Silva RCMC, Fox EGP, Gomes FM, Feijó DF, Ramos I, Koeller CM, Costa TFR, Rodrigues NS, Lima AP, Atella GC, Miranda K, Schoijet AC, Alonso GD, de Alcântara Machado E, Heise N. Venom alkaloids against Chagas disease parasite: search for effective therapies. Sci Rep 2020; 10:10642. [PMID: 32606423 PMCID: PMC7327076 DOI: 10.1038/s41598-020-67324-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2018] [Accepted: 06/01/2020] [Indexed: 11/09/2022] Open
Abstract
Chagas disease is an important disease affecting millions of patients in the New World and is caused by a protozoan transmitted by haematophagous kissing bugs. It can be treated with drugs during the early acute phase; however, effective therapy against the chronic form of Chagas disease has yet to be discovered and developed. We herein tested the activity of solenopsin alkaloids extracted from two species of fire ants against the protozoan parasite Trypanosoma cruzi, the aetiologic agent of Chagas disease. Although IC50 determinations showed that solenopsins are more toxic to the parasite than benznidazole, the drug of choice for Chagas disease treatment, the ant alkaloids presented a lower selectivity index. As a result of exposure to the alkaloids, the parasites became swollen and rounded in shape, with hypertrophied contractile vacuoles and intense cytoplasmic vacuolization, possibly resulting in osmotic stress; no accumulation of multiple kinetoplasts and/or nuclei was detected. Overexpressing phosphatidylinositol 3-kinase-an enzyme essential for osmoregulation that is a known target of solenopsins in mammalian cells-did not prevent swelling and vacuolization, nor did it counteract the toxic effects of alkaloids on the parasites. Additional experimental results suggested that solenopsins induced a type of autophagic and programmed cell death in T. cruzi. Solenopsins also reduced the intracellular proliferation of T. cruzi amastigotes in infected macrophages in a concentration-dependent manner and demonstrated activity against Trypanosoma brucei rhodesiense bloodstream forms, which is another important aetiological kinetoplastid parasite. The results suggest the potential of solenopsins as novel natural drugs against neglected parasitic diseases caused by kinetoplastids.
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Affiliation(s)
- Rafael C M Costa Silva
- Instituto de Biofísica Carlos Chagas Filho, Centro de Ciências da Saúde, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, 21941-902, Brazil.,Instituto de Microbiologia Paulo de Góes, Centro de Ciências da Saúde, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, 21941-902, Brazil
| | - Eduardo G P Fox
- Instituto de Biofísica Carlos Chagas Filho, Centro de Ciências da Saúde, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, 21941-902, Brazil.,Red Imported Fire Ant Research Centre, South China Agricultural University, Guangzhou, 510642, People's Republic of China
| | - Fabio M Gomes
- Instituto de Biofísica Carlos Chagas Filho, Centro de Ciências da Saúde, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, 21941-902, Brazil.,Laboratory of Malaria and Vector Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, MD, 20852, USA
| | - Daniel F Feijó
- Instituto de Microbiologia Paulo de Góes, Centro de Ciências da Saúde, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, 21941-902, Brazil
| | - Isabela Ramos
- Instituto de Bioquímica Médica Leopoldo de Meis, Centro de Ciências da Saúde, Universidade Federal Do Rio de Janeiro, Rio de Janeiro, RJ, 21941-902, Brazil.,Instituto Nacional de Ciência e Tecnologia em Entomologia Molecular, Rio de Janeiro, RJ, 21941-902, Brazil
| | - Carolina M Koeller
- Instituto de Biofísica Carlos Chagas Filho, Centro de Ciências da Saúde, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, 21941-902, Brazil.,Department of Microbiology and Immunology, School of Medicine and Biological Sciences, University at Buffalo, Buffalo, NY, 14203, USA
| | - Tatiana F R Costa
- Instituto de Biofísica Carlos Chagas Filho, Centro de Ciências da Saúde, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, 21941-902, Brazil
| | - Nathalia S Rodrigues
- Instituto de Biofísica Carlos Chagas Filho, Centro de Ciências da Saúde, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, 21941-902, Brazil
| | - Ana P Lima
- Instituto de Biofísica Carlos Chagas Filho, Centro de Ciências da Saúde, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, 21941-902, Brazil
| | - Georgia C Atella
- Instituto de Bioquímica Médica Leopoldo de Meis, Centro de Ciências da Saúde, Universidade Federal Do Rio de Janeiro, Rio de Janeiro, RJ, 21941-902, Brazil.,Instituto Nacional de Ciência e Tecnologia em Entomologia Molecular, Rio de Janeiro, RJ, 21941-902, Brazil
| | - Kildare Miranda
- Instituto de Biofísica Carlos Chagas Filho, Centro de Ciências da Saúde, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, 21941-902, Brazil.,Instituto Nacional de Ciência e Tecnologia em Biologia Estrutural e Bioimagem, Rio de Janeiro, RJ, 21941-902, Brazil
| | - Alejandra C Schoijet
- Instituto de Investigaciones en Ingeniería Genética y Biología Molecular "Dr. Héctor N. Torres" (INGEBI-CONICET), C1428ADN, Buenos Aires, Argentina
| | - Guillermo D Alonso
- Instituto de Investigaciones en Ingeniería Genética y Biología Molecular "Dr. Héctor N. Torres" (INGEBI-CONICET), C1428ADN, Buenos Aires, Argentina.
| | - Ednildo de Alcântara Machado
- Instituto de Biofísica Carlos Chagas Filho, Centro de Ciências da Saúde, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, 21941-902, Brazil. .,Instituto Nacional de Ciência e Tecnologia em Entomologia Molecular, Rio de Janeiro, RJ, 21941-902, Brazil.
| | - Norton Heise
- Instituto de Biofísica Carlos Chagas Filho, Centro de Ciências da Saúde, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, 21941-902, Brazil.
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9
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Wu F, Huang J, Xu M, Fox EGP, Beattie GAC, Holford P, Cen Y, Deng X. Host and environmental factors influencing 'Candidatus Liberibacter asiaticus' acquisition in Diaphorina citri. Pest Manag Sci 2018; 74:2738-2746. [PMID: 29726075 DOI: 10.1002/ps.5060] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2018] [Revised: 04/14/2018] [Accepted: 05/03/2018] [Indexed: 05/27/2023]
Abstract
BACKGROUND Diaphorina citri is a vector of 'Candidatus Liberibacter asiaticus' (CLas) associated with citrus Huanglongbing. In this study, the infection and titers of CLas in the psyllid, were monitored for life cycle stage, sex, host-plant CLas titer, host-plant genotype, and ambient temperature. RESULTS Acquisition efficiency of CLas by D. citri was highest in nymphs reared at 25 °C on a host plant with high CLas titers but was independent of the host genotypes assessed and of vector sex. We further observed that D. citri nymphs acquired CLas more rapidly than adults based on acquisition access periods (AAPs). CLas did not multiply in the alimentary canal, hemolymph, and salivary glands of adults for 18 days after a 3-day AAP as adult. However, CLas multiplication was detected in hemolymph and salivary gland of adults after the bacterium was acquired by nymphs. Eighty percent of salivary glands of adults contained CLas 18 days after a 3-day AAP as nymph compared to 10% 18 days after a 3-day AAP as adults. CONCLUSION Different factors tested herein influenced CLas acquisition efficiency of D. citri, CLas multiplication and spread inside the psyllid. These observations serve to better understand mechanisms of CLas infection in D. citri. © 2018 Society of Chemical Industry.
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Affiliation(s)
- Fengnian Wu
- Citrus Huanglongbing Research Laboratory/Laboratory of Insect Ecology, South China Agricultural University, Guangzhou, China
| | - Jiaquan Huang
- Citrus Huanglongbing Research Laboratory/Laboratory of Insect Ecology, South China Agricultural University, Guangzhou, China
| | - Meirong Xu
- Citrus Huanglongbing Research Laboratory/Laboratory of Insect Ecology, South China Agricultural University, Guangzhou, China
| | - Eduardo G P Fox
- Citrus Huanglongbing Research Laboratory/Laboratory of Insect Ecology, South China Agricultural University, Guangzhou, China
| | - G Andrew C Beattie
- School of Science and Health, Western Sydney University, Penrith, New South Wales, Australia
| | - Paul Holford
- School of Science and Health, Western Sydney University, Penrith, New South Wales, Australia
| | - Yijing Cen
- Citrus Huanglongbing Research Laboratory/Laboratory of Insect Ecology, South China Agricultural University, Guangzhou, China
| | - Xiaoling Deng
- Citrus Huanglongbing Research Laboratory/Laboratory of Insect Ecology, South China Agricultural University, Guangzhou, China
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10
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Zamith-Miranda D, Fox EGP, Monteiro AP, Gama D, Poublan LE, de Araujo AF, Araujo MFC, Atella GC, Machado EA, Diaz BL. The allergic response mediated by fire ant venom proteins. Sci Rep 2018; 8:14427. [PMID: 30258210 PMCID: PMC6158280 DOI: 10.1038/s41598-018-32327-z] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2017] [Accepted: 08/28/2018] [Indexed: 02/07/2023] Open
Abstract
Fire ants are widely studied, invasive and venomous arthropod pests. There is significant biomedical interest in immunotherapy against fire ant stings. However, mainly due to practical reasons, the physiological effects of envenomation has remained poorly characterized. The present study takes advantage of a recently-described venom protein extract to delineate the immunological pathways underlying the allergic reaction to fire ant venom toxins. Mice were injected with controlled doses of venom protein extract. Following sensitization and a second exposure, a marked footpad swelling was observed. Based on eosinophil recruitment and production of Th2 cytokines, we hereby establish that fire ant proteins per se can lead to an allergic response, which casts a new light into the mechanism of action of these toxins.
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Affiliation(s)
- Daniel Zamith-Miranda
- Laboratório de Inflamação, Instituto de Biofisica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Eduardo G P Fox
- Fire Ant Research Center, South China Agricultural University, Guangdong, P.R. China
| | - Ana Paula Monteiro
- Laboratório de Inflamação, Instituto de Biofisica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Diogo Gama
- Laboratório de Bioquímica de Insetos e Parasito (Labip), Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Luiz E Poublan
- Laboratório de Inflamação, Instituto de Biofisica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Almair Ferreira de Araujo
- Laboratório de Inflamação, Instituto de Biofisica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Maria F C Araujo
- Laboratório de Bioquímica de Lipídios e Lipoproteínas, Instituto de Bioquímica Médica Leopoldo de Meis, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Georgia C Atella
- Laboratório de Bioquímica de Lipídios e Lipoproteínas, Instituto de Bioquímica Médica Leopoldo de Meis, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Ednildo A Machado
- Laboratório de Bioquímica de Insetos e Parasito (Labip), Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Bruno L Diaz
- Laboratório de Inflamação, Instituto de Biofisica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil.
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11
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Fox EGP, Xu M, Wang L, Chen L, Lu YY. Gas-chromatography and UV-spectroscopy of Hymenoptera venoms obtained by trivial centrifugation. Data Brief 2018; 18:992-998. [PMID: 29900266 PMCID: PMC5996826 DOI: 10.1016/j.dib.2018.03.101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2018] [Accepted: 03/21/2018] [Indexed: 11/04/2022] Open
Abstract
This paper summarises gas-chromatography (GC–MS) and preliminary UV-spectroscopy analyses data of fresh, unmodified venom of aculeate hymenopterans (ants, bees, wasps), mainly focusing on red imported fire ants. No solvents nor fractionation were used at any point, which is a novel approach to describing integral toxins cocktails as proposed by Fox et al. (2018a) [1] 10.1016/j.toxicon.2018.02.050 where these results are discussed in deeper details. Herein we focus on further characterising the obtained venom extracted through a novel approach. Pertaining raw data is accessible from Fox et al. (2018b) [2] 10.17632/cpnscw2gkc.1 including further relevant information regarding the used insects, machinery settings, chemical standards. A method for milking crude venom from arthropods by trivial centrifugation is described. The new method enabled discovery of new molecules in the venom of fire ants. Pilot tests with other species illustrate immediate potential for novel insights into venom composition. Due to its simplicity the method can be easily adapted to other arthropods.
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Affiliation(s)
- Eduardo G P Fox
- Red Imported Fire Ant Research Center, South China Agricultural University, Guangzhou 510642, PR China
| | - Meng Xu
- Chinese Academy of Sciences, Institute of Zoology, State Key Laboratory of Integrated Management of Pest Insects and Rodents, Beijing 100101, PR China
| | - Lei Wang
- Red Imported Fire Ant Research Center, South China Agricultural University, Guangzhou 510642, PR China
| | - Li Chen
- Chinese Academy of Sciences, Institute of Zoology, State Key Laboratory of Integrated Management of Pest Insects and Rodents, Beijing 100101, PR China
| | - Yong-Yue Lu
- Red Imported Fire Ant Research Center, South China Agricultural University, Guangzhou 510642, PR China
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12
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Fox EGP, Xu M, Wang L, Chen L, Lu YY. Speedy milking of fresh venom from aculeate hymenopterans. Toxicon 2018; 146:120-123. [PMID: 29510162 DOI: 10.1016/j.toxicon.2018.02.050] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2018] [Revised: 02/17/2018] [Accepted: 02/28/2018] [Indexed: 11/30/2022]
Abstract
A straightforward method for extracting aculeate arthropod venoms by centrifugation is described, based on adapting a glass insert containing a piece of metal mesh or glass wool into a centrifuge tube. Venom apparatuses are centrifuged for 30 s intervals at ≈2000-6000 g, with samples being dislodged between cycles. Venom from fire ants, honeybees, and a social wasp were extracted within minutes. The method is suited for small-scale bioassays and allows for faithful descriptions of unmodified toxin cocktails.
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Affiliation(s)
- Eduardo G P Fox
- Red Imported Fire Ant Research Centre, South China Agricultural University, Guangzhou, 510642, PR China.
| | - Meng Xu
- Chinese Academy of Sciences, Institute of Zoology, State Key Laboratory of Integrated Management of Pest Insects and Rodents, Beijing, 100101, PR China
| | - Lei Wang
- Red Imported Fire Ant Research Centre, South China Agricultural University, Guangzhou, 510642, PR China
| | - Li Chen
- Chinese Academy of Sciences, Institute of Zoology, State Key Laboratory of Integrated Management of Pest Insects and Rodents, Beijing, 100101, PR China
| | - Yong-Yue Lu
- Red Imported Fire Ant Research Centre, South China Agricultural University, Guangzhou, 510642, PR China.
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13
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dos Santos Pinto JRA, Fox EGP, Saidemberg DM, Santos LD, da Silva Menegasso AR, Costa-Manso E, Machado EA, Bueno OC, Palma MS. Proteomic View of the Venom from the Fire Ant Solenopsis invicta Buren. J Proteome Res 2012; 11:4643-53. [DOI: 10.1021/pr300451g] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- José R. A. dos Santos Pinto
- Institute of Biosciences, Center
of the Study of Social Insects/Department of Biology, University of São Paulo State (UNESP), Rio Claro,
SP, Brazil
| | - Eduardo G. P. Fox
- Laboratório
de Entomologia Médica e Molecular, Instituto de Biofísica
Carlos Chagas Filho, Federal University of Rio de Janeiro (IBCCF/UFRJ), Rio de Janeiro, Brazil
| | - Daniel M. Saidemberg
- Institute of Biosciences, Center
of the Study of Social Insects/Department of Biology, University of São Paulo State (UNESP), Rio Claro,
SP, Brazil
| | - Lucilene D. Santos
- Institute of Biosciences, Center
of the Study of Social Insects/Department of Biology, University of São Paulo State (UNESP), Rio Claro,
SP, Brazil
| | - Anally R. da Silva Menegasso
- Institute of Biosciences, Center
of the Study of Social Insects/Department of Biology, University of São Paulo State (UNESP), Rio Claro,
SP, Brazil
| | | | - Ednildo A. Machado
- Laboratório
de Entomologia Médica e Molecular, Instituto de Biofísica
Carlos Chagas Filho, Federal University of Rio de Janeiro (IBCCF/UFRJ), Rio de Janeiro, Brazil
| | - Odair C. Bueno
- Institute of Biosciences, Center
of the Study of Social Insects/Department of Biology, University of São Paulo State (UNESP), Rio Claro,
SP, Brazil
| | - Mario S. Palma
- Institute of Biosciences, Center
of the Study of Social Insects/Department of Biology, University of São Paulo State (UNESP), Rio Claro,
SP, Brazil
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14
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Solis DR, Fox EGP, Rossi ML, Bueno OC. Description of the immatures of Linepithema humile Mayr (Hymenoptera: Formicidae). Biol Res 2010; 43:19-30. [PMID: 21157629] [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: 05/30/2023] Open
Abstract
Linepithema humile Mayr is an ant species originally native to South America that has been spread accidently throughout the globe through international trade. It is a serious urban and crop pest. Despite its economic importance, little is known about the larvae of this species apart from a brief description based on a few specimens. The present investigation is aimed at describing every immature stage of L. humile. Three larval instars were determined through the frequency distribution of the maximum width of head capsules from a sample of 525 larvae. The morphological descriptions were based on 150 eggs, 70 larvae, and 90 pupae examined by light and scanning electron microscopy. Some morphological characteristics reported to be typical of Linepithema Mayr larvae were confirmed--dolichoderoid body shape, presence of dorsal protuberance, sparse simple body hairs, presence of nine pairs of spiracles and dolichoderoid mandibles. We concluded that an earlier published description was based on queen larvae, and that the protuberance is only present in worker larvae. The information provided in this study may aid ant systematics and phylogenetics, as well provide a better understanding of the biology of this species.
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Affiliation(s)
- Daniel R Solis
- Centro de Estudos de Insetos Sociais, Instituto de Biociências, São Paulo State University, Rio Claro, SP, Brazil.
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15
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Abstract
A new myrmecophilous silverfish (Zygentoma: Nicoletiidae: Subnicoletiinae) from Rio de Janeiro, Brazil, found living in fire ant (Solenopsis saevissima, Formicidae: Myrmicinae) nests is described: Allotrichotriura saevissima gen. nov. sp. nov. is compared with the other genera and subgenera known in the subfamily. The main diagnostic features would include the combination of body shape, body and head setation, morphology of praetarsus, and number of abdominal stylets and vesicles. Although further quests were attempted at the type-locality, only the original described material, exclusively composed of females, remains known.
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