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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 J+Am+Heart+Assoc
2015 ; 4
(6
): e001852
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English Wikipedia
p-Cresyl sulfate aggravates cardiac dysfunction associated with chronic kidney
disease by enhancing apoptosis of cardiomyocytes
#MMPMID26066032
Han H
; Zhu J
; Zhu Z
; Ni J
; Du R
; Dai Y
; Chen Y
; Wu Z
; Lu L
; Zhang R
J Am Heart Assoc
2015[Jun]; 4
(6
): e001852
PMID26066032
show ga
BACKGROUND: Cardiovascular disease is the leading cause of death in patients with
chronic kidney disease. A body of evidence suggests that p-cresyl sulfate (PCS),
a uremic toxin, is associated with the cardiovascular mortality rate of patients
with chronic kidney disease; however, the molecular mechanisms underlying this
feature have not yet been fully elucidated. METHODS AND RESULTS: We aimed to
determine whether PCS accumulation could adversely affect cardiac dysfunction via
direct cytotoxicity to cardiomyocytes. In mice that underwent 5/6 nephrectomy,
PCS promoted cardiac apoptosis and affected the ratio of left ventricular
transmitral early peak flow velocity to left ventricular transmitral late peak
flow velocity (the E/A ratio) observed by echocardiography (n=8 in each group).
Apocynin, an inhibitor of NADPH oxidase activity, attenuates this alteration of
the E/A ratio (n=6 in each group). PCS also exhibited proapoptotic properties in
H9c2 cells by upregulating the expression of p22(phox) and p47(phox), NADPH
oxidase subunits, and the production of reactive oxygen species. Apocynin and
N-acetylcysteine were both able to suppress the effect of PCS, underscoring the
importance of NADPH oxidase activation for the mechanism of action. CONCLUSIONS:
This study demonstrated that the cardiac toxicity of PCS is at least partially
attributed to induced NADPH oxidase activity and reactive oxygen species
production facilitating cardiac apoptosis and resulting in diastolic dysfunction.