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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 Nat+Commun
2017 ; 8
(ä): 14807
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Cytoglobin regulates blood pressure and vascular tone through nitric oxide
metabolism in the vascular wall
#MMPMID28393874
Liu X
; El-Mahdy MA
; Boslett J
; Varadharaj S
; Hemann C
; Abdelghany TM
; Ismail RS
; Little SC
; Zhou D
; Thuy LT
; Kawada N
; Zweier JL
Nat Commun
2017[Apr]; 8
(ä): 14807
PMID28393874
show ga
The identity of the specific nitric oxide dioxygenase (NOD) that serves as the
main in vivo regulator of O(2)-dependent NO degradation in smooth muscle remains
elusive. Cytoglobin (Cygb) is a recently discovered globin expressed in
fibroblasts and smooth muscle cells with unknown function. Cygb, coupled with a
cellular reducing system, efficiently regulates the rate of NO consumption by
metabolizing NO in an O(2)-dependent manner with decreased NO consumption in
physiological hypoxia. Here we show that Cygb is a major regulator of NO
degradation and cardiovascular tone. Knockout of Cygb greatly prolongs NO decay,
increases vascular relaxation, and lowers blood pressure and systemic vascular
resistance. We further demonstrate that downregulation of Cygb prevents
angiotensin-mediated hypertension. Thus, Cygb has a critical role in the
regulation of vascular tone and disease. We suggest that modulation of the
expression and NOD activity of Cygb represents a strategy for the treatment of
cardiovascular disease.
|Animals
[MESH]
|Blood Pressure/*physiology
[MESH]
|Cardiovascular Diseases/prevention & control
[MESH]