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2018 ; 50
(4
): 1-14
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Orally active, species-independent novel A(3) adenosine receptor antagonist
protects against kidney injury in db/db mice
#MMPMID29674631
Dorotea D
; Cho A
; Lee G
; Kwon G
; Lee J
; Sahu PK
; Jeong LS
; Cha DR
; Ha H
Exp Mol Med
2018[Apr]; 50
(4
): 1-14
PMID29674631
show ga
Diabetic kidney disease (DKD) is the leading cause of end-stage kidney disease,
and the current pharmacological treatment for DKD is limited to renin-angiotensin
system (RAS) inhibitors. Adenosine is detectable in the kidney and is
significantly elevated in response to cellular damage. While all 4 known subtypes
of adenosine receptors, namely, A(1)AR, A(2a)AR, A(2b)AR, and A(3)AR, are
expressed in the kidney, our previous study has demonstrated that a novel, orally
active, species-independent, and selective A(3)AR antagonist, LJ-1888,
ameliorates unilateral ureteral obstruction-induced tubulointerstitial fibrosis.
The present study examined the protective effects of LJ-2698, which has higher
affinity and selectivity for A(3)AR than LJ-1888, on DKD. In experiment I,
dose-dependent effects of LJ-2698 were examined by orally administering 1.5, 5,
or 10?mg/kg for 12 weeks to 8-week-old db/db mice. In experiment II, the effects
of LJ-2698 (10?mg/kg) were compared to those of losartan (1.5?mg/kg), which is a
standard treatment for patients with DKD. LJ-2698 effectively prevented kidney
injuries such as albuminuria, glomerular hypertrophy, tubular injury, podocyte
injury, fibrosis, inflammation, and oxidative stress in diabetic mice as much as
losartan. In addition, inhibition of lipid accumulation along with increases in
PGC1?, a master regulator of mitochondrial biogenesis, were demonstrated in
diabetic mice treated with either LJ-2698 or losartan. These results suggest that
LJ-2698, a selective A(3)AR antagonist, may become a novel therapeutic agent
against DKD.