pH-sensitive cationic nanoparticles for endosomal cell-free DNA scavenging against acute inflammation.
J Control Release
; 369: 88-100, 2024 May.
Article
em En
| MEDLINE
| ID: mdl-38471640
ABSTRACT
Cell-free DNA (cfDNA) released from dead cells could be a player in some autoimmune disorders by activating Toll-like receptor 9 (TLR9) and inducing proinflammatory cytokines. Cationic nanoparticles (cNPs) address cfDNA clearance, yet challenges persist, including toxicity, low specificity and ineffectiveness against endocytosed cfDNA. This study introduced pH-sensitive cNPs, reducing off-target effects and binding cfDNA at inflammatory sites. This unique approach inhibits the TLR9 pathway, offering a novel strategy for inflammation modulation. Synthesized cNPs, with distinct cationic moieties, exhibit varied pKa values, enhancing cfDNA binding. Comprehensive studies elucidate the mechanism, demonstrating minimal extracellular binding, enhanced endosomal DNA binding, and optimal tumor necrosis factor-α suppression. In a traumatic brain injury mice model, pH-sensitive cNPs effectively suppress inflammatory cytokines, highlighting their potential in acute inflammation regulation.
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Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Endossomos
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Cátions
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Receptor Toll-Like 9
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Nanopartículas
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Ácidos Nucleicos Livres
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Inflamação
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Camundongos Endogâmicos C57BL
Limite:
Animals
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Humans
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Male
Idioma:
En
Ano de publicação:
2024
Tipo de documento:
Article