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@article{1660778,
author = {Eliáš, Sara and Hurychová, Jana and Toubarro Tiago, Duarte Nuno and Frias, Jorge and Kunc, Martin and Dobeš, Pavel and Simões, Nelson and Hyršl, Pavel},
article_location = {Basel},
article_number = {6},
doi = {http://dx.doi.org/10.3390/insects11060353},
keywords = {Heterorhabditis bacteriophora; excreted/secreted products; phenoloxidase; immunity; melanization; Galleria mellonella; virulence},
language = {eng},
issn = {2075-4450},
journal = {Insects},
title = {Bioactive Excreted/Secreted Products of Entomopathogenic Nematode Heterorhabditis bacteriophora Inhibit the Phenoloxidase Activity during the Infection},
url = {https://www.mdpi.com/2075-4450/11/6/353},
volume = {11},
year = {2020}
}
TY - JOUR
ID - 1660778
AU - Eliáš, Sara - Hurychová, Jana - Toubarro Tiago, Duarte Nuno - Frias, Jorge - Kunc, Martin - Dobeš, Pavel - Simões, Nelson - Hyršl, Pavel
PY - 2020
TI - Bioactive Excreted/Secreted Products of Entomopathogenic Nematode Heterorhabditis bacteriophora Inhibit the Phenoloxidase Activity during the Infection
JF - Insects
VL - 11
IS - 6
SP - 1-19
EP - 1-19
PB - MDPI
SN - 20754450
KW - Heterorhabditis bacteriophora
KW - excreted/secreted products
KW - phenoloxidase
KW - immunity
KW - melanization
KW - Galleria mellonella
KW - virulence
UR - https://www.mdpi.com/2075-4450/11/6/353
L2 - https://www.mdpi.com/2075-4450/11/6/353
N2 - Entomopathogenic nematodes (EPNs) are efficient insect parasites, that are known for their mutualistic relationship with entomopathogenic bacteria and their use in biocontrol. EPNs produce bioactive molecules referred to as excreted/secreted products (ESPs), which have come to the forefront in recent years because of their role in the process of host invasion and the modulation of its immune response. In the present study, we confirmed the production of ESPs in the EPN Heterorhabditis bacteriophora, and investigated their role in the modulation of the phenoloxidase cascade, one of the key components of the insect immune system. ESPs were isolated from 14- and 21-day-old infective juveniles of H. bacteriophora, which were found to be more virulent than newly emerged nematodes, as was confirmed by mortality assays using Galleria mellonella larvae. The isolated ESPs were further purified and screened for the phenoloxidase-inhibiting activity. In these products, a 38 kDa fraction of peptides was identified as the main candidate source of phenoloxidase-inhibiting compounds. This fraction was further analyzed by mass spectrometry and the de novo sequencing approach. Six peptide sequences were identified in this active ESP fraction, including proteins involved in ubiquitination and the regulation of a Toll pathway, for which a role in the regulation of insect immune response has been proposed in previous studies.
ER -
ELIÁŠ, Sara, Jana HURYCHOVÁ, Duarte Nuno TOUBARRO TIAGO, Jorge FRIAS, Martin KUNC, Pavel DOBEŠ, Nelson SIMÕES a Pavel HYRŠL. Bioactive Excreted/Secreted Products of Entomopathogenic Nematode Heterorhabditis bacteriophora Inhibit the Phenoloxidase Activity during the Infection. Online. \textit{Insects}. Basel: MDPI, 2020, roč.~11, č.~6, s.~1-19. ISSN~2075-4450. Dostupné z: https://dx.doi.org/10.3390/insects11060353. [citováno 2024-04-23]
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