Python Cathelicidin CATHPb1 Protects against Multidrug-Resistant Staphylococcal Infections by Antimicrobial-Immunomodulatory Duality

Multidrug-resistant Staphylococcus aureus, including MRSA (methicillin-resistant) and VRSA (vancomycin-resistant), causes serious healthcare-associated infections, even sepsis and death. Here, we identified six novel cathelicidins (CATHPb1-6) from Python bivittatu, and CATHPb1 displayed the best in vitro pharmacological and toxicological profile. We further show that CATHPb1 exhibited evident protection in mice MRSA/VRSA infection models, given either 24 h before or 4 h after infection. The protection was all effective through different administration routes, but was blocked by in vivo depletion of monocyte/macrophages or neutrophils. CATHPb1 can rapidly and massively modulate macrophages/monocytes and neutrophils trafficking to the infection site, and potentiate their bactericidal functions. Meanwhile, CATHPb1 remarkably augmented neutrophil-mediated bacteria killing by facilitating neutrophil extracellular traps (NETs) formation and preventing its degradation. Acting through MAPKs and NF-κB pathways, CATHPb1 selectively enhanced the levels of chemokines while reducing the production of pro-inflammatory cytokines without undesirable toxicities. The much improved serum half-life and stabilities confer CATHPb1 an excellent prospect to become a novel therapeutic agent against multidrug-resistant staphylococcal infections.

Medienart:

E-Artikel

Erscheinungsjahr:

2018

Erschienen:

2018

Enthalten in:

Zur Gesamtaufnahme - volume:61

Enthalten in:

Journal of medicinal chemistry - 61(2018), 5 vom: 08. März, Seite 2075-2086

Sprache:

Englisch

Beteiligte Personen:

Cai, Shasha [VerfasserIn]
Qiao, Xue [VerfasserIn]
Feng, Lan [VerfasserIn]
Shi, Nannan [VerfasserIn]
Wang, Hui [VerfasserIn]
Yang, Huaixin [VerfasserIn]
Guo, Zhilai [VerfasserIn]
Wang, Mengke [VerfasserIn]
Chen, Yan [VerfasserIn]
Wang, Yipeng [VerfasserIn]
Yu, Haining [VerfasserIn]

Links:

Volltext

Themen:

Antimicrobial Cationic Peptides
Cathelicidins
Chemokines
Cytokines
Journal Article
Research Support, Non-U.S. Gov't

Anmerkungen:

Date Completed 03.05.2019

Date Revised 03.05.2019

published: Print-Electronic

Citation Status MEDLINE

doi:

10.1021/acs.jmedchem.8b00036

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM281243042