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2016 ; 6
(ä): 21810
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Specific regulation of PRMT1 expression by PIAS1 and RKIP in BEAS-2B epithelia
cells and HFL-1 fibroblasts in lung inflammation
#MMPMID26911452
Liu L
; Sun Q
; Bao R
; Roth M
; Zhong B
; Lan X
; Tian J
; He Q
; Li D
; Sun J
; Yang X
; Lu S
Sci Rep
2016[Feb]; 6
(ä): 21810
PMID26911452
show ga
Protein arginine methyltransferase 1 (PRMT1) catalyzes methylation of histones
and other cellular proteins, and thus regulates gene transcription and protein
activity. In antigen-induced pulmonary inflammation (AIPI) PRMT1 was up-regulated
in the epithelium, while in chronic AIPI, increased PRMT1 shifted to fibroblasts.
In this study we investigated the cell type specific regulatory mechanism of
PRMT1. Epithelial cells and fibroblasts were stimulated with IL-4 or IL-1?. Gene
and protein expression were determined by RT-qPCR, immunohistochemistry staining
and Western blotting. Signaling pathway inhibitors, siRNAs and shRNA were used to
determine the regulatory mechanism of PRMT1. The results showed that IL-4
up-regulated PRMT1 through STAT6 signaling in epithelial cells, while IL-1?
regulated PRMT1 through NF-?B in fibroblasts. The NF-kB inhibitor protein RKIP
was highly expressed in epithelial cells and blocked IL-1? induced PRMT1
up-regulation; while the STAT6 inhibitor protein PIAS1 was expressed in
fibroblasts and suppressed IL-4 induced PRMT1 expression. Furthermore, IL-4
stimulated epithelial cells to release IL-1? which up-regulated PRMT1 expression
in fibroblasts. In conclusion, the inhibitor proteins RKIP and PIAS1 regulated
the cell type and signaling specific expression of PRMT1. Thus PRMT1 expression
in structural lung cells in asthma can be considered as potential target for new
therapeutic intervention.