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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 Braz+J+Med+Biol+Res
2016 ; 49
(10
): e5431
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Angiotensin-(1-7) inhibits inflammation and oxidative stress to relieve lung
injury induced by chronic intermittent hypoxia in rats
#MMPMID27599201
Lu W
; Kang J
; Hu K
; Tang S
; Zhou X
; Yu S
; Li Y
; Xu L
Braz J Med Biol Res
2016[Sep]; 49
(10
): e5431
PMID27599201
show ga
Obstructive sleep apnea is associated with inflammation and oxidative stress in
lung tissues and can lead to metabolic abnormalities. We investigated the effects
of angiotensin1-7 [Ang-(1-7)] on lung injury in rats induced by chronic
intermittent hypoxia (CIH). We randomly assigned 32 male Sprague-Dawley rats
(180-200 g) to normoxia control (NC), CIH-untreated (uCIH), Ang-(1-7)-treated
normoxia control (N-A), and Ang-(1-7)-treated CIH (CIH-A) groups. Oxidative
stress biomarkers were measured in lung tissues, and expression of NADPH oxidase
4 (Nox4) and Nox subunits (p22phox, and p47phox) was determined by Western blot
and reverse transcription-polymerase chain reaction. Pulmonary pathological
changes were more evident in the uCIH group than in the other groups.
Enzyme-linked immunosorbent assays and immunohistochemical staining showed that
inflammatory factor concentrations in serum and lung tissues in the uCIH group
were significantly higher than those in the NC and N-A groups. Expression of
inflammatory factors was significantly higher in the CIH-A group than in the NC
and N-A groups, but was lower than in the uCIH group (P<0.01). Oxidative stress
was markedly higher in the uCIH group than in the NC and N-A groups. Expression
of Nox4 and its subunits was also increased in the uCIH group. These changes were
attenuated upon Ang-(1-7) treatment. In summary, treatment with Ang-(1-7)
reversed signs of CIH-induced lung injury via inhibition of inflammation and
oxidative stress.