While plasma angiotensinogen and blood pressure were positively correlated only in subjects with a positive family history of hypertension (r=0.33, P< 0.05), plasma leptin was related to blood pressure in both groups (r=0.26, P=0.01).
When BMI and leptin are elevated, increased blood pressure is found only with the most prevalent LEPR genotype at codons 109 and 223, whereas variants of this receptor seem to protect from hypertension.
We identified significant associations between LEPTIN single nucleotide polymorphisms with blood pressure and hypertension, but in postmenopausal women only.
VPA administration prevented the progression of hypertension and inhibited the increase in expression of HDAC1 and RAS components.VPA did not affect plasma leptin level.
To examine the association of a common -2548G/A (rs7799039) promoter variant of the human leptin gene (LEP) with obesity or body mass index (BMI) and its associated phenotypes such as blood pressure variability and the prevalence of hypertension in a sample of the Tunisian population.
To address this we investigated the effects of inhibiting oestrogen synthesis and metabolism on the development of pulmonary hypertension in male and female obese mice.We depleted endogenous oestrogen in leptin-deficient (<i>ob</i>/<i>ob</i>) mice with the oestrogen inhibitor anastrozole (ANA) and determined the effects on the development of pulmonary hypertension, plasma oestradiol and urinary 16α-hydroxyestrone (16αOHE1).
These observations suggested that COX-2 may have an important role in the effects of leptin on inflammation, such as the low-inflammatory disease hypertension.
There is now convincing evidence from animal studies that major signals such as leptin and insulin have a sympathoexcitatory action in the hypothalamus to cause hypertension.
There are several known factors implicating this association, e.g. high blood pressure leads to remodeling of the carotid arterial wall, to its stiffness and to a diminished activation of baroreceptors; leptin released from a fatty tissue activates the sympathetic nervous system etc.
The study confirmed that shorter alleles of microsatellites in the 3' flanking region of leptin are significantly associated with hypertension, however, the underlying mechanism remains unknown.
The MHO individuals with abnormal adipokines were significantly more likely to developing hypertension (high leptin, relative risk 11.04; 95% confidence interval, 1.18-103.35; and high leptin/adiponectin ratio, relative risk 9.88; 95% confidence interval, 1.11-87.97) compared to metabolically healthy normal-weight individuals with normal adipokine levels.
The major finding from the present study was that the natural rise in plasma leptin with weight-gain is insufficient to counterbalance high blood pressure associated with obesity, additional increases of circulating leptin levels with adenoviral leptin gene therapy led to normalisation of blood pressure in high-fat diet-induced obese and hypertensive rats.
The following are recorded: body weight; energy intake; glucose tolerance; plasma leptin concentration and lipid profile; populations of Bacteroidetes, Firmicutes, bacteroidales, clostridiales, enterobacteriales, and Escherichia coli in feces; blood pressure; urine uric acid and F<sub>2t</sub> isoprostanes (F<sub>2</sub> -IsoPs); perigonadal fat deposition; and hepatic histology and diacylglycerols (DAGs) in liver and adipose tissue. d-Fagomine reduces sucrose-induced hypertension, urine uric acid and F<sub>2</sub> -IsoPs (markers of oxidative stress), steatosis, and liver DAGs, without significantly affecting perigonadal fat deposition, and impaired glucose tolerance.
The clinical potential of this pathway remains under investigation; however, existing data indicate that a sex discrepancy exists in mechanisms of leptin-mediated hypertension between males and females and that leptin-stimulated aldosterone plays a significant role in females.
The aim of the present study was to evaluate four single nucleotide polymorphisms (SNPs) of APLNR genes (rs11544374 and rs948847), LEPR (rs1137101) and leptin (rs7799039) gene in patients with CAD and hypertension.