2019
Photorhabdus lectins disrupt the activity of insect and human immune system
DOBEŠ, Pavel, Eva FUJDIAROVÁ, Josef HOUSER, Gita JANČAŘÍKOVÁ, Pavel HYRŠL et. al.Základní údaje
Originální název
Photorhabdus lectins disrupt the activity of insect and human immune system
Autoři
DOBEŠ, Pavel (203 Česká republika, domácí), Eva FUJDIAROVÁ (203 Česká republika, domácí), Josef HOUSER (203 Česká republika, domácí), Gita JANČAŘÍKOVÁ (203 Česká republika, domácí), Pavel HYRŠL (203 Česká republika, domácí) a Michaela WIMMEROVÁ (203 Česká republika, garant, domácí)
Vydání
International Congress on Invertebrate Pathology and Microbial Control & 52nd Annual Meeting of the Society for Invertebrate Pathology & 17th Meeting of the IOBC‐WPRS Working Group “Microbial and Nematode Control of Invertebrate Pests” 2019
Další údaje
Jazyk
angličtina
Typ výsledku
Konferenční abstrakt
Obor
10608 Biochemistry and molecular biology
Stát vydavatele
Španělsko
Utajení
není předmětem státního či obchodního tajemství
Kód RIV
RIV/00216224:14310/19:00107542
Organizační jednotka
Přírodovědecká fakulta
Klíčová slova česky
Photorhabdus; lektin; imunita; melanizace; kyslíkové radikály
Klíčová slova anglicky
Photorhabdus; lectin; immunity; melanisation; reactive oxygen species
Příznaky
Mezinárodní význam
Změněno: 6. 8. 2019 15:45, Mgr. Pavel Dobeš, Ph.D.
V originále
Bacteria of the genus Photorhabdus are known as potent entomopathogens that produce a variety of toxins, proteases and other virulence factors to overcome host immune system and successfully establish the infection. Although lectins with their carbohydrate-binding abilities are not the typical example of molecules causing direct damage to host organism, they are indispensable in the processes such as attachment to cells, immunoevasion and immunosuppression. Bacteria of the genus Photorhabdus are not an exception as they produce lectins that could help them to interact with nematode symbionts, other bacteria or host immune system. Recently, we focused on lectins produced by P. laumondii (formerly classified as P. luminescens subsp. laumondii) that are not only able to bind to insect haemocytes, but also to disturb cellular and humoral immune response. Lectin treatment of insect haemolymph induced melanisation catalysed by phenoloxidase; this increase was not observed when we used the lectin pre-treated with saccharides selected according to its specificity. Although, P. laumondii is not considered to be human pathogen (unlike closely related P. asymbiotica), its lectin is able to inhibit production of reactive oxygen species in human blood induced by neutrophil activator zymosan A, whereas it is not able to supress the action of other activators such as phorbol 12-myristate 13-acetate or fMLF. Our results suggest that the lectin interferes with Toll-like receptor 2 and thus can impair the production of reactive oxygen species by host phagocytes. The work was supported by the Czech Science Foundation (grants no. 17-03253S and 18-18964S).
Česky
Bacteria of the genus Photorhabdus are known as potent entomopathogens that produce a variety of toxins, proteases and other virulence factors to overcome host immune system and successfully establish the infection. Although lectins with their carbohydrate-binding abilities are not the typical example of molecules causing direct damage to host organism, they are indispensable in the processes such as attachment to cells, immunoevasion and immunosuppression. Bacteria of the genus Photorhabdus are not an exception as they produce lectins that could help them to interact with nematode symbionts, other bacteria or host immune system. Recently, we focused on lectins produced by P. laumondii (formerly classified as P. luminescens subsp. laumondii) that are not only able to bind to insect haemocytes, but also to disturb cellular and humoral immune response. Lectin treatment of insect haemolymph induced melanisation catalysed by phenoloxidase; this increase was not observed when we used the lectin pre-treated with saccharides selected according to its specificity. Although, P. laumondii is not considered to be human pathogen (unlike closely related P. asymbiotica), its lectin is able to inhibit production of reactive oxygen species in human blood induced by neutrophil activator zymosan A, whereas it is not able to supress the action of other activators such as phorbol 12-myristate 13-acetate or fMLF. Our results suggest that the lectin interferes with Toll-like receptor 2 and thus can impair the production of reactive oxygen species by host phagocytes. The work was supported by the Czech Science Foundation (grants no. 17-03253S and 18-18964S).
Návaznosti
| GA17-03253S, projekt VaV |
| ||
| GA18-18964S, projekt VaV |
|