The power of NOYouTube↗  IA↗(long shot)
Science & Technology  26.6K views 198 likes 2 dislikes   24 Jan 2012
NutritionFacts.org 1.4M subscribers United States YouTube↗


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“The Power of NO”
"Síla oxidu dusnatého"
Our understanding of nitric oxide has come a long way since it was named
Naše porozumění oxidu dusnatému hodně pokročilo od doby, kdy byl
“molecule of the year” in 1992, and won some folks a Nobel Prize in ’98.
v roce 1992 nazván "molekulou roku" a v roce 1998 získal určitým lidem Nobelovu cenu.
It is a key biological messenger within the body, and its message is:
Je to klíčový biologický posel v těle a jeho poselství je:
“open sesame.”
"Sezame, otevři se."
It’s released by the lining of our arteries to tell the muscle fibers
Je uvolňován výstelkou našich tepen a dává svalovým vláknům
within the walls of our arteries to relax,
uvnitř stěn našich tepen pokyn, aby se uvolnily.
so our arteries open up and let the blood flow.
Proto se naše tepny otevírají a umožňují proudění krve.
That’s why when people are having a heart attack, they’re giving nitroglycerine,
To je důvod, proč se lidem, kteří utrpí infarkt, podává nitroglycerin,
which our body converts to nitric oxide to open up our arteries.
jenž naše tělo přemění na oxid dusnatý a tím dojde k roztažení tepen.
In fact that’s how Viagra works: it boosts nitric oxide signaling,
Takto vlastně funguje Viagra: zvyšuje signalizaci oxidu dusnatého,
which leads to dilation of the penile arteries.
což vede k dilataci tepen penisu.
The ED we really need to be concerned about, though, is endothelial dysfunction:
Ale ED, které bychom se skutečně měli obávat, je endoteliální dysfunkce:
dysfunction of the lining of all our arteries, considered a first step
dysfunkce výstelky veškerých tepen, která se považuje za první krok
toward atherosclerosis, our leading cause of death.
vedoucí k ateroskleróze, naší hlavní příčině úmrtí.
Here’s what happens: NO, nitric oxide,
Takto se to odehrává: NO, oxid dusnatý,
is produced by an enzyme called NO synthase.
je produkován enzymem zvaným NO syntáza.
If you have a lot of free radicals in your body, though,
Pokud však máte ve svém těle hodně volných radikálů,
they come in and not only gobble up the NO—
nejenom že si pochutnají na tom NO -
they hijack this enzyme.
ale dokonce i unesou ten enzym.
They hijack NO synthase, take it over,
Unesou NO syntázu, převezmou ji,
and have it instead start making more free radicals.
a místo toho ji přinutí vyrábět více volných radikálů.
So our arteries become dysfunctional.
Tím se naše tepny stávají dysfunkčními.
They don’t relax when they should.
Nedokáží se roztáhnout, když by měly.
And that can contribute to the hardening of our arteries.
A to může přispívat ke kornatění tepen.
If, however, we flood our body with antioxidants by eating healthy foods,
Pokud však jíme zdravé potraviny a tělo zaplavíme antioxidanty,
it should quench those free radicals, and let NO get back to its job.
měly by volné radikály zneutralizovat a NO by se měl pustit zpět do své práce.
So recently, for the first time ever,
Takže nedávno a vůbec poprvé v historii
researchers studied the effects of eating high-antioxidant foods on NO activity.
zkoumali vědci účinky konzumace vysoce antioxidačních potravin na aktivitu NO.
We saw what choosing higher antioxidant plant foods did to inflammation.
Viděli jsme, co udělaly vysoce antioxidační rostlinné potraviny se zánětem.
What effect does it have on our arterial function?
Jaký vliv mají na naše arteriální funkce?
You can hook people up to a device that measures the dilation of their arteries
Můžete lidi připojit k zařízení, které ultrazvukem měří
and blood flow through ultrasound.
roztažení jejich tepen a průtok krve.
In the study, people started eating their normal miserable diet,
Ve této studii lidé začali na své běžné ubohé stravě,
then switched to an even more miserable diet,
pak přešli na ještě strašnější stravu
and their arterial dilation capacity dropped, though not significantly.
a jejich kapacita arteriální dilatace klesla, i když nijak výrazně.
They started out eating a pretty crappy diet to begin with,
Začali na poměrně mizerné stravě,
but which they then let people get back to,
ke které je pak nechali se vrátit
and so then their NO activity came back to baseline.
a tak se jejich aktivita NO vrátila zpět do výchozího stavu.
Then they had these people eat the higher-antioxidant foods, like berries,
Pak je přiměli jíst vysoce antioxidační potraviny, jako jsou bobuloviny,
and within a period of just two weeks,
a během pouhých dvou týdnů se projevil
a significant jump in their arteries’ ability to relax and dilate normally.
významný skok ve schopnosti jejich tepen se uvolnit a roztáhnout.
This is where they should have been in the first place, or even higher.
Takto by to mělo fungovat už od začátku nebo ještě lépe.
This study suggests that choosing antioxidant-rich plant foods
Tato studie naznačuje, že při výběru rostlinných potravin bohatých na antioxidanty
can improve blood flow to all parts of our bodies.
můžete zlepšit průtok krve do všech částí těla.
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