Stressi ja südameatakkide vahel valitseb seos

Allikas: www.teadus.err.ee
Pidev kõrge stressitase seab ohtu südame tervise. Teadlased tegid kindlaks seose stressihormoonide ja bakterite vahel, pakkudes seletust mehhanismile, kuidas emotsionaalsed üleelamised vallandavad südameatakke.
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Soovid hoida südame tervena, väldi stressi

Töös leiti, et stressi situatsioonides vabanevad hormoonid põhjustavad bakterite levikut arterite seintel. Selle protsessi ajal toodavad bakterid ensüüme, mis võivad arteri seintel olevatest naastulademetest vabastada vereringesse tombukesi.

Selline mehhanism sobib hästi kokku senise arusaamaga, et südameatakid ja insuldid esinevad sagedamini olukordade järgselt, mil verre ja kudedesse vabanevad suurenenud katekolamiinide tasemed; see on iseloomulik äkiliste emotsionaalsete šokiseisundite ja stressi ning järsu ülepinge korral.

Uuringus kasvatati erinevaid bakteritüvesid, mis olid eraldatud ateroskleroosi poolt mõjutatud arteriseintelt, ning leiti, et kindlad molekulaarsed signaalid võivad põhjustada selliste ensüümide vabanemist, mis soodustavad arteriaalsete naastude eemaldumist ja jõudmist vereringesse. Tombukeste vabanemine omakorda võib aga vallandada  südameatakke.

Allikas: www.teadus.err.ee

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Alkeemik
2018-08-16 01:44:23


Henderson Elizabeth
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