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LPS-induced TIR domain complex acetylation activated TLR4/MAL/MyD88 signal pathway in sepsis [scRNA-Seq]

ABSTRACT: LPS-induced TIR domain complex acetylation activated TLR4/MAL/MyD88 signal pathway in sepsis [scRNA-Seq]

PROVIDER: PRJNA1117037 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR29195677_1.fastq.gz	Fastqsanger.gz
	SRR29195677_2.fastq.gz	Fastqsanger.gz

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LPS-induced TIR domain complex acetylation activated TLR4/MAL/MyD88 signal pathway in sepsis

Project description:Among the diseases caused by Toll-like receptor 4 (TLR4) abnormal activation by bacterial endotoxin, sepsis is the most dangerous one. The reprogramming of macrophages plays a crucial role in orchestrating the pathogenesis of sepsis. However, the precise mechanism underlying TLR4 activation in macrophages remained incompletely understood. Our studies revealed that upon lipopolysaccharide (LPS) stimulation, CREB-binding protein (CBP) was recruited to the TLR4 signalosome complex and resulted in pronounced acetylation in the TIR domains of TLR4, Myeloid differentiation factor 88 (MyD88) and MyD88 adapter-like (MAL), which significantly enhanced the activation of the NF-κB signaling pathway and polarization of M1 macrophages. In sepsis patients, significantly elevated TLR4-TIR acetylation was detected in CD16+ monocytes combined with elevated expression of M1 macrophage markers and production of pro-inflammatory cytokines. In contrast, histone deacetylase 1 (HDAC1) served as a key deacetylase in the deacetylation of the TIR domain complex. The inhibition of HDAC1 accelerated sepsis-associated syndromes, while the inhibition of CBP alleviated this process. Overall, our findings highlighted the crucial role of TIR domain complex acetylation in the regulation of inflammatory immune response and suggested that the reversible acetylation of the complex emerged as a promising therapeutic target for M1 macrophages during the progression of sepsis.

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