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2017 ; 23
(ä): 1916-1922
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Expression of Acid-Sensing Ion Channels in Renal Tubular Epithelial Cells and
Their Role in Patients with Henoch-Schönlein Purpura Nephritis
#MMPMID28428534
Yuan LP
; Bo Y
; Qin Z
; Ran H
; Li W
; Li YF
; Ming G
Med Sci Monit
2017[Apr]; 23
(ä): 1916-1922
PMID28428534
show ga
BACKGROUND Acid-sensing ion channels (ASICs) are ligand-gated cation channels
activated by extracellular protons. However, the role of ASICs in kidney diseases
remains uncertain. This study investigated ASICs expression in kidney tissues and
their role in the development of Henoch-Schönlein purpura nephritis (HSPN).
MATERIAL AND METHODS The expression of ASIC subunits was examined by
immunochemical techniques in the kidney tissue from HSPN patients. Acid-induced
ASICs expression in cultured renal tubular epithelial cells was determined by
quantitative RT-PCR analysis. The expression of K7 and K18 protein in renal
tubular epithelial cells was used to evaluate acid-induced cell injury. In
addition, we observed the effect of blocking ASICs on acid-induced cell injury to
assess the role of ASICs in renal tubular epithelial cell injury. RESULTS The
results showed that ASIC1, ASIC2, and ASIC3 proteins were obviously expressed in
renal tubular cells from HSPN patients. ASIC1 expression and 24-h urine protein
level were higher in the pathological grade ISKD III group than in the ISKD II
group. ASIC1, ASIC2, and ASIC3 mRNA, and K7 and K18 protein expression in
cultured renal tubular epithelial cells were increased when exposed to pH 6.5. K7
and K18 protein expression was closely related to ASIC1 expression, and ASICs
blockers reduced K7 and K18 protein expression in tubular epithelial cells.
CONCLUSIONS These findings suggest ASICs are most highly expressed in renal
tubular cells of HSPN patients, which is closely related to renal tubular injury.
ASICs might be involved in the development of HSPN.
|Acid Sensing Ion Channels/*genetics/*metabolism
[MESH]