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2017 ; 8
(16
): 26532-26551
Nephropedia Template TP
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English Wikipedia
Sodium butyrate improves porcine host defense peptide expression and relieves the
inflammatory response upon Toll-like receptor 2 activation and histone
deacetylase inhibition in porcine kidney cells
#MMPMID28460447
Dou X
; Han J
; Song W
; Dong N
; Xu X
; Zhang W
; Shan A
Oncotarget
2017[Apr]; 8
(16
): 26532-26551
PMID28460447
show ga
Host defense peptides (HDPs) are an important component of the innate immune
system and possess direct antimicrobial and immunomodulatory activities. Dietary
regulation of HDPs synthesis has emerged as a novel non-antibiotic approach to
combat pathogen infection. There are species- and tissue-dependent
characteristics of the regulation and mechanism of HDPs. In this study, we
investigated whether the histone deacetylase inhibitor (HDACi) sodium butyrate
(NaB) could induce HDP expression and the mechanism underlying NaB-regulated HDP
expression in PK-15 cells. Our results revealed that NaB augmented HDP expression
in PK-15 cells, including porcine ?-defensin 3 (pBD3), epididymis protein 2
splicing variant C (pEP2C), pBD128, pBD123, and pBD115, but no inflammatory
response occurred. Inhibition of HDAC activity was not sufficient to induce the
expression of pBD3 and pEP2C in comparisons of NaB and another HDACi,
trichostatin A (TSA). Concomitantly, NF-?B activation was involved in the
induction of HDP expression by NaB. MAPK pathway inhibition also prevented pBD3
and pEP2C induction by NaB. Furthermore, NaB could still promote pBD3 and pEP2C
expression and inhibit IL-6 production in the presence of the toll-like receptor
2 (TLR2) ligand peptidoglycan. Moreover, TLR2 could be activated by both NaB and
peptidoglycan, and blocking TLR2 expression suppressed HDP induction. Finally, we
further showed that increased pBD3 could decrease cytokine interleukin-18 (IL-18)
and increase porcine claudin 15 (pCLDN15) contents, suggesting an
immunoregulatory function of pBD3. In conclusion, this work paves the way for
using HDACi-NaB to induce porcine kidney defense peptides while limiting the
deleterious risk of an inflammatory response.