blood pressure–lowering effect in animal and human
studies, irrespective of dose, duration, or disease
status (Clark, Zahradka and Taylor, 2015).
Flavonoids are scavengers of free radicals such
as superoxide anions and lipid proxy radicals and by
preventing oxidation of LDL-C, because oxidized
LDL is believed to be atherogenic. Therefore,
flavonoids may decrease the formation of
atherosclerotic plaques and reduce arterial stiffness,
arteries more responsive to the endogenous stimuli
of vasodilation. Studies have shown that
consumption of fruit, vegetable and tea (black and
green) containing high amount of flavonoid may
lead to lower blood pressure and may provide
protection against coronary heart disease and stroke.
It is possible that their antioxidant effect is
responsible (Kooshki and Hoseini, 2014).
Oxidative stress contributes to increase blood
pressure by acting on eNOS uncoupling and
decrease bioavailability of nitric oxide. The result is
a predominant on factors vasoconstrictors and low
action of vasodilators in vascular bed (Mink et al.,
2007). In the cardiovascular system, the reactive
oxygen species (ROSs) are produced in vascular
cells by a number of oxidases, including NADPH
oxidase, xanthine oxidase, lipoxygenase, and
cytochrome P450 (Mink et al., 2007; Kizhakekuttu
and Windlasky, 2010) Furthermore, clinical data
have suggested that there is increased endogenous
antioxidant, introducing exogenous antioxidants
present in food. In fact, the reduction of oxidative
stress has been accompanied by decreasing
cardiovascular risk and blood pressure in humans
used include vitamins A, C, and E, L-arginine,
flavonoids, coenzyme Q10, and alpha-lipoic acid
(Cherubini, 2008). Of these, flavonoids have gained
attention for their higher antioxidant power than the
others. In fact, the selected studies that used
supplements based on flavonoids, all demonstrated
significant reductions in blood pressure in
hypertensive , and hypercholesterolemic individuals.
The reductions were more pronounced for systolic
blood pressure, with a reduction of around 3 mmHg.
For diastolic blood pressure, only the study by Ward
et al (Ward et al., 2005) identified a significant
reduction (3 mmHg). Although these reductions are
relatively discreet, these are clinically significant, so
that hypotension afforded by the flavonoid is
equivalent to the use of a class of antihypertensive
medication (Baster, 2014).
These are some of the changes that can occur
during pregnancy, especially in pre eclamsia.
Oxidative stress seems to play an important role in
preeclampsia. Increased levels of reactive oxygen
species (ROS) might be the result of ischemia-
reperfusion injury from deficient conversion of the
medial segment of the spiral arteries. Increased ROS
exposure leads to protein, lipid and DNA oxidation
all of which have been found in placentas from
patients with preeclampsia. Other mechanisms
involved in preeclampsia include enhanced
sensitivity to angiotensin II (Mustafa et al., 2012) .
A subset of women with pre-eclampsia have
detectable autoantibodies against type-1 angiotensin
II receptor (AT1) in the serum, which can activate
AT1 in endothelial cells, vascular smooth muscle
cells, and mesangial cells from the kidney
glomerulus. AT1 autoantobodies have been shown
to induce hypertension, proteinuria, glomerulus
capillary endotheliosis, increased production of
sVEGFR-1 (soluble Vascular Endothelial Growth
Factor Receptor) and to stimulate the synthesis of
NADPH oxidase (Wallukat et al., 1999; Peres,
Mariana and Cairrão, 2018). So it is suitable to use
LaPiSe juice that contain of flavonoid to help
pregnant women that suffering pre eclamsia.
Limitation of this study was the absence of another
component measurement of LaPiSe juice that might
be can help reduced blood pressure.
5 CONCLUSION
There was a significant difference in pregnant
women blood pressure which was given LaPise juice
and not given LaPiSe juice. LaPiSe juice can be
used as an alternative healthy drink to lower blood
pressure.
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