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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Am+J+Physiol+Renal+Physiol
2015 ; 308
(8
): F910-22
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Aliskiren restores renal AQP2 expression during unilateral ureteral obstruction
by inhibiting the inflammasome
#MMPMID25694485
Wang W
; Luo R
; Lin Y
; Wang F
; Zheng P
; Levi M
; Yang T
; Li C
Am J Physiol Renal Physiol
2015[Apr]; 308
(8
): F910-22
PMID25694485
show ga
Ureteral obstruction is associated with reduced expression of renal aquaporins
(AQPs), urinary concentrating defects, and an enhanced inflammatory response, in
which the renin-angiotensin system (RAS) may play an important role. We evaluated
whether RAS blockade by a direct renin inhibitor, aliskiren, would prevent the
decreased renal protein expression of AQPs in a unilateral ureteral obstruction
(UUO) model and what potential mechanisms may be involved. UUO was performed for
3 days (3UUO) and 7 days (7UUO) in C57BL/6 mice with or without aliskiren
injection. In 3UUO and 7UUO mice, aliskiren abolished the reduction of AQP2
protein expression but not AQP1, AQP3, and AQP4. mRNA levels of renal AQP2 and
vasopressin type 2 receptor were decreased in obstructed kidneys of 7UUO mice,
which were prevented by aliskiren treatment. Aliskiren treatment was also
associated with a reduced inflammatory response in obstructed kidneys of UUO
mice. Aliskiren significantly decreased mRNA levels of several proinflammatory
factors, such as transforming growth factor-? and tumor necrosis factor-?, seen
in obstructed kidneys of UUO mice. Interestingly, mRNA and protein levels of the
NOD-like receptor family, pyrin domain-containing 3 (NLRP3) inflammasome
components apoptosis-associated speck-like protein containing a caspase
recruitment domain, caspase-1, and IL-1? were dramatically increased in
obstructed kidneys of 7UUO mice, which were significantly suppressed by
aliskiren. In primary cultured inner medullary collecting duct cells, IL-1?
significantly decreased AQP2 expression. In conclusions, RAS blockade with the
direct renin inhibitor aliskiren increased water channel AQP2 expression in
obstructed kidneys of UUO mice, at least partially by preventing NLRP3
inflammasome activation in association with ureteral obstruction.
|Amides/*pharmacology
[MESH]
|Angiotensin II Type 1 Receptor Blockers/pharmacology
[MESH]