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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+Biol+Chem
2016 ; 291
(21
): 11105-13
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Oxidative Stress and Nuclear Factor ?B (NF-?B) Increase Peritoneal Filtration and
Contribute to Ascites Formation in Nephrotic Syndrome
#MMPMID27033704
Udwan K
; Brideau G
; Fila M
; Edwards A
; Vogt B
; Doucet A
J Biol Chem
2016[May]; 291
(21
): 11105-13
PMID27033704
show ga
Water accumulation in the interstitium (edema) and the peritoneum (ascites) of
nephrotic patients is classically thought to stem from the prevailing low plasma
albumin concentration and the decreased transcapillary oncotic pressure gradient.
However, several clinical and experimental observations suggest that it might
also stem from changes in capillary permeability. We addressed this hypothesis by
studying the peritoneum permeability of rats with puromycin
aminonucleoside-induced nephrotic syndrome. The peritoneum of puromycin
aminonucleoside rats displayed an increase in the water filtration coefficient of
paracellular and transcellular pathways, and a decrease in the reflection
coefficient to proteins. It also displayed oxidative stress and subsequent
activation of NF-?B. Scavenging of reactive oxygen species and inhibition of
NF-?B prevented the changes in the water permeability and reflection coefficient
to proteins and reduced the volume of ascites by over 50%. Changes in water
permeability were associated with the overexpression of the water channel
aquaporin 1, which was prevented by reactive oxygen species scavenging and
inhibition of NF-?B. In conclusion, nephrotic syndrome is associated with an
increased filtration coefficient of the peritoneum and a decreased reflection
coefficient to proteins. These changes, which account for over half of ascite
volume, are triggered by oxidative stress and subsequent activation of NF-?B.