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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 Am+J+Physiol+Heart+Circ+Physiol
2013 ; 304
(12
): H1733-42
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gab.com Text
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English Wikipedia
A low-carbohydrate/high-fat diet reduces blood pressure in spontaneously
hypertensive rats without deleterious changes in insulin resistance
#MMPMID23604708
Bosse JD
; Lin HY
; Sloan C
; Zhang QJ
; Abel ED
; Pereira TJ
; Dolinsky VW
; Symons JD
; Jalili T
Am J Physiol Heart Circ Physiol
2013[Jun]; 304
(12
): H1733-42
PMID23604708
show ga
Previous studies reported that diets high in simple carbohydrates could increase
blood pressure in rodents. We hypothesized that the converse, a
low-carbohydrate/high-fat diet, might reduce blood pressure. Six-week-old
spontaneously hypertensive rats (SHR; n = 54) and Wistar-Kyoto rats (WKY; n = 53,
normotensive control) were fed either a control diet (C; 10% fat, 70%
carbohydrate, 20% protein) or a low-carbohydrate/high-fat diet (HF; 20%
carbohydrate, 60% fat, 20% protein). After 10 wk, SHR-HF had lower (P < 0.05)
mean arterial pressure than SHR-C (148 ± 3 vs. 159 ± 3 mmHg) but a similar degree
of cardiac hypertrophy (33.4 ± 0.4 vs. 33.1 ± 0.4 heart weight/tibia length,
mg/mm). Mesenteric arteries and the entire aorta were used to assess vascular
function and endothelial nitric oxide synthase (eNOS) signaling, respectively.
Endothelium-dependent (acetylcholine) relaxation of mesenteric arteries was
improved (P < 0.05) in SHR-HF vs. SHR-C, whereas contraction (potassium chloride,
phenylephrine) was reduced (P < 0.05). Phosphorylation of eNOSSer1177 increased
(P < 0.05) in arteries from SHR-HF vs. SHR-C. Plasma glucose, insulin, and
homoeostatic model of insulin assessment were lower (P < 0.05) in SHR-HF vs.
SHR-C, whereas peripheral insulin sensitivity (insulin tolerance test) was
similar. After a 10-h fast, insulin stimulation (2 U/kg ip) increased (P < 0.05)
phosphorylation of AktSer473 and S6 in heart and gastrocnemius similarly in SHR-C
vs. SHR-HF. In conclusion, a low-carbohydrate/high-fat diet reduced blood
pressure and improved arterial function in SHR without producing signs of insulin
resistance or altering insulin-mediated signaling in the heart, skeletal muscle,
or vasculature.