1
|
Chen J, Webb J, Shariati K, Guo S, Montclare JK, McArt S, Ma M. Pollen-inspired enzymatic microparticles to reduce organophosphate toxicity in managed pollinators. NATURE FOOD 2021; 2:339-347. [PMID: 37117728 DOI: 10.1038/s43016-021-00282-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2020] [Accepted: 04/20/2021] [Indexed: 04/30/2023]
Abstract
Pollinators support the production of the leading food crops worldwide. Organophosphates are a heavily used group of insecticides that pollinators can be exposed to, especially during crop pollination. Exposure to lethal or sublethal doses can impair fitness of wild and managed bees, risking pollination quality and food security. Here we report a low-cost, scalable in vivo detoxification strategy for organophosphate insecticides involving encapsulation of phosphotriesterase (OPT) in pollen-inspired microparticles (PIMs). We developed uniform and consumable PIMs capable of loading OPT at 90% efficiency and protecting OPT from degradation in the pH of a bee gut. Microcolonies of Bombus impatiens fed malathion-contaminated pollen patties demonstrated 100% survival when fed OPT-PIMs but 0% survival with OPT alone, or with plain sucrose within five and four days, respectively. Thus, the detrimental effects of malathion were eliminated when bees consumed OPT-PIMs. This design presents a versatile treatment that can be integrated into supplemental feeds such as pollen patties or dietary syrup for managed pollinators to reduce risk of organophosphate insecticides.
Collapse
Affiliation(s)
- Jing Chen
- Department of Biological and Environmental Engineering, Cornell University, Ithaca, NY, USA
| | - James Webb
- Department of Biological and Environmental Engineering, Cornell University, Ithaca, NY, USA
| | - Kaavian Shariati
- Department of Biological and Environmental Engineering, Cornell University, Ithaca, NY, USA
| | - Shengbo Guo
- Department of Chemical and Biomolecular Engineering, New York University Tandon School of Engineering, Brooklyn, NY, USA
| | - Jin-Kim Montclare
- Department of Chemical and Biomolecular Engineering, New York University Tandon School of Engineering, Brooklyn, NY, USA
| | - Scott McArt
- Department of Entomology, Cornell University, Ithaca, NY, USA
| | - Minglin Ma
- Department of Biological and Environmental Engineering, Cornell University, Ithaca, NY, USA.
| |
Collapse
|
2
|
Lin Z, Pang S, Zhang W, Mishra S, Bhatt P, Chen S. Degradation of Acephate and Its Intermediate Methamidophos: Mechanisms and Biochemical Pathways. Front Microbiol 2020; 11:2045. [PMID: 33013750 PMCID: PMC7461891 DOI: 10.3389/fmicb.2020.02045] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2020] [Accepted: 08/03/2020] [Indexed: 11/28/2022] Open
Abstract
Acephate is an organophosphate pesticide that has been widely used to control insect pests in agricultural fields for decades. However, its use has been partially restricted in many countries due to its toxic intermediate product methamidophos. Long term exposure to acephate and methamidophos in non-target organisms results in severe poisonous effects, which has raised public concern and demand for the removal of these pollutants from the environment. In this paper, the toxicological effects of acephate and/or methamidophos on aquatic and land animals, including humans are reviewed, as these effects promote the necessity of removing acephate from the environment. Physicochemical degradation mechanisms of acephate and/or methamidophos are explored and explained, such as photo-Fenton, ultraviolet/titanium dioxide (UV/TiO2) photocatalysis, and ultrasonic ozonation. Compared with physicochemical methods, the microbial degradation of acephate and methamidophos is emerging as an eco-friendly method that can be used for large-scale treatment. In recent years, microorganisms capable of degrading methamidophos or acephate have been isolated, including Hyphomicrobium sp., Penicillium oxalicum, Luteibacter jiangsuensis, Pseudomonas aeruginosa, and Bacillus subtilis. Enzymes related to acephate and/or methamidophos biodegradation include phosphotriesterase, paraoxonase 1, and carboxylesterase. Furthermore, several genes encoding organophosphorus degrading enzymes have been identified, such as opd, mpd, and ophc2. However, few reviews have focused on the biochemical pathways and molecular mechanisms of acephate and methamidophos. In this review, the mechanisms and degradation pathways of acephate and methamidophos are summarized in order to provide a new way of thinking for the study of the degradation of acephate and methamidophos.
Collapse
Affiliation(s)
- Ziqiu Lin
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Integrative Microbiology Research Centre, South China Agricultural University, Guangzhou, China.,Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, China
| | - Shimei Pang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Integrative Microbiology Research Centre, South China Agricultural University, Guangzhou, China.,Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, China
| | - Wenping Zhang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Integrative Microbiology Research Centre, South China Agricultural University, Guangzhou, China.,Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, China
| | - Sandhya Mishra
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Integrative Microbiology Research Centre, South China Agricultural University, Guangzhou, China.,Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, China
| | - Pankaj Bhatt
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Integrative Microbiology Research Centre, South China Agricultural University, Guangzhou, China.,Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, China
| | - Shaohua Chen
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Integrative Microbiology Research Centre, South China Agricultural University, Guangzhou, China.,Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, China
| |
Collapse
|
3
|
Diversity and Horizontal Transfer of Antarctic Pseudomonas spp. Plasmids. Genes (Basel) 2019; 10:genes10110850. [PMID: 31661808 PMCID: PMC6896180 DOI: 10.3390/genes10110850] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2019] [Revised: 10/22/2019] [Accepted: 10/26/2019] [Indexed: 12/23/2022] Open
Abstract
Pseudomonas spp. are widely distributed in various environments around the world. They are also common in the Antarctic regions. To date, almost 200 plasmids of Pseudomonas spp. have been sequenced, but only 12 of them were isolated from psychrotolerant strains. In this study, 15 novel plasmids of cold-active Pseudomonas spp. originating from the King George Island (Antarctica) were characterized using a combined, structural and functional approach, including thorough genomic analyses, functional analyses of selected genetic modules, and identification of active transposable elements localized within the plasmids and comparative genomics. The analyses performed in this study increased the understanding of the horizontal transfer of plasmids found within Pseudomonas populations inhabiting Antarctic soils. It was shown that the majority of the studied plasmids are narrow-host-range replicons, whose transfer across taxonomic boundaries may be limited. Moreover, structural and functional analyses enabled identification and characterization of various accessory genetic modules, including genes encoding major pilin protein (PilA), that enhance biofilm formation, as well as active transposable elements. Furthermore, comparative genomic analyses revealed that the studied plasmids of Antarctic Pseudomonas spp. are unique, as they are highly dissimilar to the other known plasmids of Pseudomonas spp.
Collapse
|
4
|
Davis E, Sloan T, Aurelius K, Barbour A, Bodey E, Clark B, Dennis C, Drown R, Fleming M, Humbert A, Glasgo E, Kerns T, Lingro K, McMillin M, Meyer A, Pope B, Stalevicz A, Steffen B, Steindl A, Williams C, Wimberley C, Zenas R, Butela K, Wildschutte H. Antibiotic discovery throughout the Small World Initiative: A molecular strategy to identify biosynthetic gene clusters involved in antagonistic activity. Microbiologyopen 2017; 6. [PMID: 28110506 PMCID: PMC5458470 DOI: 10.1002/mbo3.435] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2016] [Revised: 11/21/2016] [Accepted: 11/28/2016] [Indexed: 12/25/2022] Open
Abstract
The emergence of bacterial pathogens resistant to all known antibiotics is a global health crisis. Adding to this problem is that major pharmaceutical companies have shifted away from antibiotic discovery due to low profitability. As a result, the pipeline of new antibiotics is essentially dry and many bacteria now resist the effects of most commonly used drugs. To address this global health concern, citizen science through the Small World Initiative (SWI) was formed in 2012. As part of SWI, students isolate bacteria from their local environments, characterize the strains, and assay for antibiotic production. During the 2015 fall semester at Bowling Green State University, students isolated 77 soil‐derived bacteria and genetically characterized strains using the 16S rRNA gene, identified strains exhibiting antagonistic activity, and performed an expanded SWI workflow using transposon mutagenesis to identify a biosynthetic gene cluster involved in toxigenic compound production. We identified one mutant with loss of antagonistic activity and through subsequent whole‐genome sequencing and linker‐mediated PCR identified a 24.9 kb biosynthetic gene locus likely involved in inhibitory activity in that mutant. Further assessment against human pathogens demonstrated the inhibition of Bacillus cereus, Listeria monocytogenes, and methicillin‐resistant Staphylococcus aureus in the presence of this compound, thus supporting our molecular strategy as an effective research pipeline for SWI antibiotic discovery and genetic characterization.
Collapse
Affiliation(s)
- Elizabeth Davis
- Department of Biological SciencesBowling Green State UniversityBowling GreenOHUSA
| | - Tyler Sloan
- Department of Biological SciencesBowling Green State UniversityBowling GreenOHUSA
| | - Krista Aurelius
- Department of Biological SciencesBowling Green State UniversityBowling GreenOHUSA
| | - Angela Barbour
- Department of Biological SciencesBowling Green State UniversityBowling GreenOHUSA
| | - Elijah Bodey
- Department of Biological SciencesBowling Green State UniversityBowling GreenOHUSA
| | - Brigette Clark
- Department of Biological SciencesBowling Green State UniversityBowling GreenOHUSA
| | - Celeste Dennis
- Department of Biological SciencesBowling Green State UniversityBowling GreenOHUSA
| | - Rachel Drown
- Department of Biological SciencesBowling Green State UniversityBowling GreenOHUSA
| | - Megan Fleming
- Department of Biological SciencesBowling Green State UniversityBowling GreenOHUSA
| | - Allison Humbert
- Department of Biological SciencesBowling Green State UniversityBowling GreenOHUSA
| | - Elizabeth Glasgo
- Department of Biological SciencesBowling Green State UniversityBowling GreenOHUSA
| | - Trent Kerns
- Department of Biological SciencesBowling Green State UniversityBowling GreenOHUSA
| | - Kelly Lingro
- Department of Biological SciencesBowling Green State UniversityBowling GreenOHUSA
| | - MacKenzie McMillin
- Department of Biological SciencesBowling Green State UniversityBowling GreenOHUSA
| | - Aaron Meyer
- Department of Biological SciencesBowling Green State UniversityBowling GreenOHUSA
| | - Breanna Pope
- Department of Biological SciencesBowling Green State UniversityBowling GreenOHUSA
| | - April Stalevicz
- Department of Biological SciencesBowling Green State UniversityBowling GreenOHUSA
| | - Brittney Steffen
- Department of Biological SciencesBowling Green State UniversityBowling GreenOHUSA
| | - Austin Steindl
- Department of Biological SciencesBowling Green State UniversityBowling GreenOHUSA
| | - Carolyn Williams
- Department of Biological SciencesBowling Green State UniversityBowling GreenOHUSA
| | - Carmen Wimberley
- Department of Biological SciencesBowling Green State UniversityBowling GreenOHUSA
| | - Robert Zenas
- Department of Biological SciencesBowling Green State UniversityBowling GreenOHUSA
| | - Kristen Butela
- Department of BiologySeton Hill UniversityGreensburgPAUSA
| | - Hans Wildschutte
- Department of Biological SciencesBowling Green State UniversityBowling GreenOHUSA
| |
Collapse
|
5
|
Environmental Pseudomonads Inhibit Cystic Fibrosis Patient-Derived Pseudomonas aeruginosa. Appl Environ Microbiol 2016; 83:AEM.02701-16. [PMID: 27881418 PMCID: PMC5203635 DOI: 10.1128/aem.02701-16] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2016] [Accepted: 10/28/2016] [Indexed: 11/20/2022] Open
Abstract
Pseudomonas aeruginosa is an opportunistic pathogen which is evolving resistance to many currently used antibiotics. While much research has been devoted to the roles of pathogenic P. aeruginosa in cystic fibrosis (CF) patients, less is known of its ecological properties. P. aeruginosa dominates the lungs during chronic infection in CF patients, yet its abundance in some environments is less than that of other diverse groups of pseudomonads. Here, we sought to determine if clinical isolates of P. aeruginosa are vulnerable to environmental pseudomonads that dominate soil and water habitats in one-to-one competitions which may provide a source of inhibitory factors. We isolated a total of 330 pseudomonads from diverse habitats of soil and freshwater ecosystems and competed these strains against one another to determine their capacity for antagonistic activity. Over 900 individual inhibitory events were observed. Extending the analysis to P. aeruginosa isolates revealed that clinical isolates, including ones with increased alginate production, were susceptible to competition by multiple environmental strains. We performed transposon mutagenesis on one isolate and identified an ∼14.8-kb locus involved in antagonistic activity. Only two other environmental isolates were observed to carry the locus, suggesting the presence of additional unique compounds or interactions among other isolates involved in outcompeting P. aeruginosa. This collection of strains represents a source of compounds that are active against multiple pathogenic strains. With the evolution of resistance of P. aeruginosa to currently used antibiotics, these environmental strains provide opportunities for novel compound discovery against drug-resistant clinical strains. IMPORTANCE We demonstrate that clinical CF-derived isolates of P. aeruginosa are susceptible to competition in the presence of environmental pseudomonads. We observed that many diverse environmental strains exhibited varied antagonistic profiles against a panel of clinical P. aeruginosa isolates, suggesting the presence of distinct mechanisms of inhibition among these ecological strains. Understanding the properties of these antagonistic events offers the potential for discoveries of antimicrobial compounds or metabolic pathways important to the development of novel treatments for P. aeruginosa infections.
Collapse
|
6
|
Acharya KP, Shilpkar P, Shah MC, Chellapandi P. Biodegradation of Insecticide Monocrotophos by Bacillus subtilis KPA-1, Isolated from Agriculture Soils. Appl Biochem Biotechnol 2014; 175:1789-804. [DOI: 10.1007/s12010-014-1401-5] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2014] [Accepted: 11/12/2014] [Indexed: 11/28/2022]
|