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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Acta+Pharmacol+Sin
2017 ; 38
(3
): 342-350
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English Wikipedia
LYRM03, an ubenimex derivative, attenuates LPS-induced acute lung injury in mice
by suppressing the TLR4 signaling pathway
#MMPMID28112185
He HQ
; Wu YX
; Nie YJ
; Wang J
; Ge M
; Qian F
Acta Pharmacol Sin
2017[Mar]; 38
(3
): 342-350
PMID28112185
show ga
Toll-like receptor 4 (TLR4)-mediated signaling plays a critical role in
sepsis-induced acute lung injury (ALI). LYRM03
(3-amino-2-hydroxy-4-phenyl-valyl-isoleucine) is a novel derivative of ubenimex,
a widely used antineoplastic medicine. We previously found that LYRM03 has
anti-inflammatory effects in cecal ligation puncture mouse model. In this study
we determined whether LYRM03 attenuated LPS-induced ALI in mice. LPS-induced ALI
mouse model was established by challenging the mice with intratracheal injection
of LPS (5 mg/kg), which was subsequently treated with LYRM03 (10 mg/kg, ip).
LYRM03 administration significantly alleviated LPS-induced lung edema,
inflammatory cell (neutrophils and macrophages) infiltration and myeloperoxidase
(MPO) activity, decreased pro-inflammatory and chemotactic cytokine (TNF-?, IL-6,
IL-1?, MIP-2) generation and reduced iNOS and COX-2 expression in the lung
tissues. In cultured mouse alveolar macrophages in vitro, pretreatment with
LYRM03 (100 ?mol/L) suppressed LPS-induced macrophage activation by reducing
Myd88 expression, increasing I?B stability and inhibiting p38 phosphorylation.
These results suggest that LYRM03 effectively attenuates LPS-induced ALI by
inhibiting the expression of pro-inflammatory mediators and Myd88-dependent TLR4
signaling pathways in alveolar macrophages. LYRM03 may serve as a potential
treatment for sepsis-mediated lung injuries.