Detailed Information on Publication Record
2024
Understanding excreted/secreted products in Heterorhabditis bacteriophora: Activation Material Insights
ŠREIBR, Sara, Jana ILGOVÁ, Pavel DOBEŠ, Jacek MARCINIAK, Jiří VOREL et. al.Basic information
Original name
Understanding excreted/secreted products in Heterorhabditis bacteriophora: Activation Material Insights
Authors
ŠREIBR, Sara (276 Germany, guarantor, belonging to the institution), Jana ILGOVÁ (703 Slovakia, belonging to the institution), Pavel DOBEŠ (203 Czech Republic, belonging to the institution), Jacek MARCINIAK (203 Czech Republic, belonging to the institution), Jiří VOREL (203 Czech Republic, belonging to the institution), Jana HURYCHOVÁ (203 Czech Republic, belonging to the institution), Martin KAŠNÝ (203 Czech Republic, belonging to the institution) and Pavel HYRŠL (203 Czech Republic, belonging to the institution)
Edition
35th Symposium of the European Society of Nematologists, 2024
Other information
Language
English
Type of outcome
Konferenční abstrakt
Field of Study
10616 Entomology
Country of publisher
Spain
Confidentiality degree
není předmětem státního či obchodního tajemství
Organization unit
Faculty of Science
Keywords in English
Excreted/secreted products; Heterorhabditis bacteriophora; activation
Změněno: 2/5/2024 23:25, doc. RNDr. Pavel Hyršl, Ph.D.
V originále
Entomopathogenic nematodes (EPNs) are insect parasites commonly used in the biological control of various insect pests. EPNs release biologically active compounds known as excreted/secreted products (ESPs) that play a crucial role in interaction with the host's immune system. This interaction enhances infection efficiency, thereby increasing the chances of EPNs' survival and successful reproduction. Unravelling the composition and function of ESPs is essential for understanding the mechanisms of nematode pathogenicity and optimizing their effectiveness as biocontrol agents. In this study, we aimed to evaluate the protein spectrum of Heterorhabditis bacteriophora ESPs released in relation of different activation materials. We identified the infection-specific molecules by comparing ESP profiles between infective juveniles treated with materials prepared from insects and controls. We optimized the in vitro activation process of H. bacteriophora and selected three fractions of activation materials from Galleria mellonella larvae, each prepared differently, along with two control fractions: water or phosphate buffer. We collected ESPs from all treatments and subjected them to LC-MS/MS analysis. For protein identification, we conducted searches against a protein database originating from the H. bacteriophora reference genome. The results recorded using the LC-MS/MS analysis revealed significant differences in the composition of ESPs based on the materials used for nematodes’ in vitro activation. Within these ESPs, we identified numerous proteins with potential to play significant role in nematode-insect interaction; including serpin domain-containing protein, metalloendopeptidase, ShTK domain-containing proteins and fatty acid- retinoid- binding proteins. Furthermore, our findings indicate that the choice of activation materials significantly influences both the abundance and diversity of collected ESP. This implies that the way of nematode activation may play a crucial role in modulating the virulence of the EPNs, suggesting an increase in the effectiveness of biocontrol. This study was supported by grant GAČR 23-06457S.
In Czech
Entomopathogenic nematodes (EPNs) are insect parasites commonly used in the biological control of various insect pests. EPNs release biologically active compounds known as excreted/secreted products (ESPs) that play a crucial role in interaction with the host's immune system. This interaction enhances infection efficiency, thereby increasing the chances of EPNs' survival and successful reproduction. Unravelling the composition and function of ESPs is essential for understanding the mechanisms of nematode pathogenicity and optimizing their effectiveness as biocontrol agents. In this study, we aimed to evaluate the protein spectrum of Heterorhabditis bacteriophora ESPs released in relation of different activation materials. We identified the infection-specific molecules by comparing ESP profiles between infective juveniles treated with materials prepared from insects and controls. We optimized the in vitro activation process of H. bacteriophora and selected three fractions of activation materials from Galleria mellonella larvae, each prepared differently, along with two control fractions: water or phosphate buffer. We collected ESPs from all treatments and subjected them to LC-MS/MS analysis. For protein identification, we conducted searches against a protein database originating from the H. bacteriophora reference genome. The results recorded using the LC-MS/MS analysis revealed significant differences in the composition of ESPs based on the materials used for nematodes’ in vitro activation. Within these ESPs, we identified numerous proteins with potential to play significant role in nematode-insect interaction; including serpin domain-containing protein, metalloendopeptidase, ShTK domain-containing proteins and fatty acid- retinoid- binding proteins. Furthermore, our findings indicate that the choice of activation materials significantly influences both the abundance and diversity of collected ESP. This implies that the way of nematode activation may play a crucial role in modulating the virulence of the EPNs, suggesting an increase in the effectiveness of biocontrol. This study was supported by grant GAČR 23-06457S.
Links
| GA23-06457S, research and development project |
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