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2016 ; 6
(ä): 27051
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LPS/TLR4 Signaling Enhances TGF-? Response Through Downregulating BAMBI During
Prostatic Hyperplasia
#MMPMID27243216
He Y
; Ou Z
; Chen X
; Zu X
; Liu L
; Li Y
; Cao Z
; Chen M
; Chen Z
; Chen H
; Qi L
; Wang L
Sci Rep
2016[May]; 6
(ä): 27051
PMID27243216
show ga
Compelling evidence suggests that benign prostatic hyperplasia (BPH) development
involves accumulation of mesenchymal-like cells derived from the prostatic
epithelium by epithelial-mesenchymal transition (EMT). Transforming growth factor
(TGF)-? induces EMT phenotypes with low E-cadherin and high vimentin expression
in prostatic epithelial cells. Here we report that LPS/TLR4 signalling induces
down-regulation of the bone morphogenic protein and activin membrane-bound
inhibitor (BAMBI), which enhances TGF-? signalling in the EMT process during
prostatic hyperplasia. Additionally, we found that the mean TLR4 staining score
was significantly higher in BPH tissues with inflammation compared with BPH
tissues without inflammation (5.13?±?1.21 and 2.96?±?0.73, respectively;
P?0.001). Moreover, patients with inflammatory infiltrate were more likely to
have a higher age (P?=?0.020), BMI (P?=?0.026), prostate volume (P?=?0.024),
total IPSS score (P?=?0.009) and IPSS-S (P?0.001). Pearson's correlation
coefficient and multiple regression analyses demonstrated that TLR4 mRNA
expression level was significantly positively associated with age, BMI, serum PSA
levels, urgency and nocturia subscores of IPSS in the inflammatory group. These
findings provide new insights into the TLR4-amplified EMT process and the
association between TLR4 levels and storage LUTS, suggesting chronic inflammation
as vital to the pathogenesis of BPH.