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2016 ; 6
(ä): 26954
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Pharmacological inhibition of MyD88 homodimerization counteracts renal ischemia
reperfusion-induced progressive renal injury in vivo and in vitro
#MMPMID27246399
Zhang LM
; Liu JH
; Xue CB
; Li MQ
; Xing S
; Zhang X
; He WT
; Jiang FC
; Lu X
; Zhou P
Sci Rep
2016[Jun]; 6
(ä): 26954
PMID27246399
show ga
The activation of innate immunity via myeloid differentiation factor 88 (MyD88)
contributes to ischemia reperfusion (I/R) induced acute kidney injury (AKI) and
chronic kidney injury. However, since there have not yet been any effective
therapy, the exact pharmacological role of MyD88 in the prevention and treatment
of renal ischemia reperfusion injury (IRI) is not known. We designed a small
molecular compound, TJ-M2010-2, which inhibited MyD88 homodimerization. We used
an established unilateral I/R mouse model. All mice undergoing 80?min ischemia
through uninephrectomy died within five days without intervention. However,
treatment with TJ-M2010-2 alone significantly improved the survival rate to
58.3%. Co-treatment of TJ-M2010-2 with the CD154 antagonist increased survival
rates up to 100%. Twenty-eight days post-I/R of 60?min ischemia without
nephrectomy, TJ-M2010-2 markedly attenuated renal interstitial and inhibited
TGF-?1-induced epithelial-mesenchymal transition (EMT) of renal tubular
epithelial cells. Furthermore, TJ-M2010-2 remarkably inhibited TLR/MyD88
signaling in vivo and in vitro. In conclusion, our findings highlight the
promising clinical potential of MyD88 inhibitor in preventing and treating acute
or chronic renal I/R injuries, and the therapeutic functionality of dual-system
inhibition strategy in IRI-induced AKI. Moreover, MyD88 inhibition ameliorates
renal I/R injury-induced tubular interstitial fibrosis by suppressing EMT.