Az akut izületi vérömleny patomechanizmusának vizsgálata = Investigation on the pathomechanism of acute hemarthrosis

2008 
A projekt vegrehajtasa soran , in vitro es klinikai vizsgalatokat vegeztunk annak erdekeben, hogy ujabb reszleteit tarjuk fel az akutan kialakulo izuleti veromleny patomechanizmusanak. In vitro kiserleteink alkalmaval az ozmotikus stressz altal okozott intracellularis jelatviteli folyamatok valtozasait kovettuk nyomon a porcsejtekben. Megallapitottuk, hogy az akut haemarthros kialakulasa soran is letre jovő, tobb mint ketszeres ozmotikus nyomasemelkedes hatasara, in vitro korulmenyek kozott, jelentős p38MAPK, ERK1/2, CREB, JNK1/2 es Akt1 aktivalodas kovetkezik be. Ez egyutt jar a porcsejtek fokozott pusztulasaval, amelynek hattereben dontően apoptotikus folymatok allnak, amint azt az annexin-v es caspase-3 flow citometrias vizsgalatai bizonyitottak. Kesőbbi kiserleteink, amelyeket a pituitary adenylate cyclase activating polypeptide (PACAP) chondroprotektiv hatasanak igazolasara vegeztunk el igazoltak, hogy a PACAP a fenti jelatviteli utak kedvező iranyu befolyasolasaval, jelnetős porcvedő hatassal rendelkezik. Klinikai vizsgalataink soran, terdizuleti haemarthrossal jelentkező betegek izuleti punktatumat hasonlitottuk ossze a venas verrel, hogy ujabb informaciokat szerezzunk az intraartikularis oxidativ stressz es leukocyta aktivacio mertekeről. Eredmenyeink igazoltak az izuleti uregben kialakulo oxidaitv stressz tenyet, az itt levő leukocytak szignaltranszdukcios folyamatainak megvaltozasat es a jelentős mertekű gyulladasos citokin termelődeset, roviddel a serules utan. | Invitro and clinical investigations were performed in order to explore some new detalis of the pathomechanism of acute intraarticular bleeding. Osmotic stress induced changes of intracellular signal transduction pathways were studied on primary chondrocyte cultures. Significant alterations of p38MAPK, ERK1/2, CREB, JNK1/2 and Akt1 activaton was indicated, which was attached to an increased and mainly apoptotic death of chondrocytes, as it was proved by flow cytometric analysis of annexin-v and caspase-3. Investigations with pituitary adenylate cyclase activating polypeptide provided good evidence for its chondroprotective effect, showing that PACAP is able to affect favourably the mentioned intracellular signal transduction pathways. In order to gain infromation regarding intraarticular oxidative stress and leukocyte activation, paired samples of joint effusion and periferal venous blood from patients with acute hemarthrosis were compared during the clinical investigations. The fact of intraarticular oxidative stress was confirmed, moreover the changes of leukocyte signal transduction and an extreme production of several inflammatory citokines (IL-1,IL-6, IL-8,IL-10,IL-12 es TNF-alfa) fllowing the injury were indicated as well.
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