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2017 ; 18
(3
): ä Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
Inhibition of NLRP3 Inflammasome Pathway by Butyrate Improves Corneal Wound
Healing in Corneal Alkali Burn
#MMPMID28273882
Bian F
; Xiao Y
; Zaheer M
; Volpe EA
; Pflugfelder SC
; Li DQ
; de Paiva CS
Int J Mol Sci
2017[Mar]; 18
(3
): ä PMID28273882
show ga
Epithelial cells are involved in the regulation of innate and adaptive immunity
in response to different stresses. The purpose of this study was to investigate
if alkali-injured corneal epithelia activate innate immunity through the
nucleotide-binding oligomerization domain-containing protein (NOD)-like receptor
family pyrin domain containing 3 (NLRP3) inflammasome pathway. A unilateral
alkali burn (AB) was created in the central cornea of C57BL/6 mice. Mice received
either no topical treatment or topical treatment with sodium butyrate (NaB),
?-hydroxybutyric acid (HBA), dexamethasone (Dex), or vehicle (balanced salt
solution, BSS) quater in die (QID) for two or five days (d). We evaluated the
expression of inflammasome components including NLRP3, apoptosis-associated
speck-like protein (ASC), and caspase-1, as well as the downstream cytokine
interleukin (IL)-1?. We found elevation of NLRP3 and IL-1? messenger RNA (mRNA)
transcripts, as well as levels of inflammasome component proteins in the
alkali-injured corneas compared to naïve corneas. Treatment with NLRP3 inhibitors
using NaB and HBA preserved corneal clarity and decreased NLRP3, caspase-1, and
IL-1? mRNA transcripts, as well as NLRP3 protein expression on post-injury
compared to BSS-treated corneas. These findings identified a novel innate immune
signaling pathway activated by AB. Blocking the NLRP3 pathway in AB mouse model
decreases inflammation, resulting in greater corneal clarity. These results
provide a mechanistic basis for optimizing therapeutic intervention in alkali
injured eyes.