Paeoniflorin reduced BLP-induced inflammatory response by inhibiting the NF-κB signal transduction in pathway THP-1...

Area of Science:

• Immunology
• Pharmacology

Background:

• Sepsis, a life-threatening condition caused by bacterial infection, has high mortality rates despite antibiotic use.
• The nuclear factor κB (NF-κB) pathway plays a crucial role in mediating inflammatory responses during sepsis.

Purpose of the Study:

• To investigate the anti-inflammatory effects of paeoniflorin on sepsis-induced inflammation.
• To elucidate the molecular mechanisms underlying paeoniflorin's action in a cellular model of sepsis.

Main Methods:

• A human THP-1 cell line was stimulated with bacterial lipoprotein (BLP) to mimic sepsis-induced inflammation.
• The study analyzed the impact of paeoniflorin on NF-κB p65 activation, IκB phosphorylation, and the expression of inflammatory cytokines like tumor necrosis factor α (TNF-α) and interleukin-6 (IL-6).
• Expression levels of Toll-like receptor 2 (TLR2) and myeloid differentiation factor 88 (MyD88) were also assessed.

Main Results:

• Paeoniflorin significantly inhibited the activation of NF-κB p65 in BLP-stimulated THP-1 cells.
• Treatment with paeoniflorin led to a reduction in the expression of TNF-α and IL-6.
• Paeoniflorin effectively inhibited IκB phosphorylation and degradation, key steps in NF-κB activation.
• No significant changes in TLR2 and MyD88 expression were observed, suggesting they are not the primary targets of paeoniflorin in this model.

Conclusions:

• Paeoniflorin demonstrates potent anti-inflammatory activity by suppressing the NF-κB signaling pathway.
• These findings provide a molecular basis for the potential therapeutic application of paeoniflorin in treating sepsis, particularly that induced by bacterial lipoproteins.