Guianensin, a Simulium guianense salivary protein, has broad anti-hemostatic and anti-inflammatory properties

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60077344%3A_____%2F23%3A00574475" target="_blank" >RIV/60077344:_____/23:00574475 - isvavai.cz</a>

Result on the web

<a href="https://www.frontiersin.org/articles/10.3389/fimmu.2023.1163367/full" target="_blank" >https://www.frontiersin.org/articles/10.3389/fimmu.2023.1163367/full</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3389/fimmu.2023.1163367" target="_blank" >10.3389/fimmu.2023.1163367</a>

Result language

angličtina

Original language name

Guianensin, a Simulium guianense salivary protein, has broad anti-hemostatic and anti-inflammatory properties

Original language description

BackgroundSalivary glands from blood-feeding arthropods secrete several molecules that inhibit mammalian hemostasis and facilitate blood feeding and pathogen transmission. The salivary functions from Simulium guianense, the main vector of Onchocerciasis in South America, remain largely understudied. Here, we have characterized a salivary protease inhibitor (Guianensin) from the blackfly Simulium guianense. Materials and methodsA combination of bioinformatic and biophysical analyses, recombinant protein production, in vitro and in vivo experiments were utilized to characterize the molecula mechanism of action of Guianensin. Kinetics of Guianensin interaction with proteases involved in vertebrate inflammation and coagulation were carried out by surface plasmon resonance and isothermal titration calorimetry. Plasma recalcification and coagulometry and tail bleeding assays were performed to understand the role of Guianensin in coagulation. ResultsGuianensin was identified in the sialotranscriptome of adult S. guianense flies and belongs to the Kunitz domain of protease inhibitors. It targets various serine proteases involved in hemostasis and inflammation. Binding to these enzymes is highly specific to the catalytic site and is not detectable for their zymogens, the catalytic site-blocked human coagulation factor Xa (FXa), or thrombin. Accordingly, Guianensin significantly increased both PT (Prothrombin time) and aPTT (Activated partial thromboplastin time) in human plasma and consequently increased blood clotting time ex vivo. Guianensin also inhibited prothrombinase activity on endothelial cells. We show that Guianensin acts as a potent anti-inflammatory molecule on FXa-induced paw edema formation in mice. ConclusionThe information generated by this work highlights the biological functionality of Guianensin as an antithrombotic and anti-inflammatory protein that may play significant roles in blood feeding and pathogen transmission.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10606 - Microbiology

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2023

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Frontiers in Immunology

ISSN

1664-3224

e-ISSN

1664-3224

Volume of the periodical

14

Issue of the periodical within the volume

JULY

Country of publishing house

CH - SWITZERLAND

Number of pages

14

Pages from-to

1163367

UT code for WoS article

001026742300001

EID of the result in the Scopus database

2-s2.0-85165076962