Poli(ADP-ribóz) polimeráz gátlók protektív hatásának vizsgálata kísérletes szívelégtelenség modellekben = Examination of the protective effect of poly(ADP-ribose) polymerase inhibitors in experimental heart failure models

Kutatásaink során kísérletes szívelégtelenség modellekben vizsgálatuk a poli(ADP-ribóz) polimeráz (PARP) gátlók hatását. Vizsgálatainkkal igazoltuk, hogy PARP-gátlók mérséklik a postinfarctusos remodelinget és védenek a szívelégtelenség kialakulásával szemben. Elsőként igazoltuk, hogy a PARP-gátlók jelentős hatással bírnak a szívelégtelenség pathomechanizmusában alapvető szerepet játszó jelátviteli utakra is. PARP-gátlás fokozta a túlélést segítő, ugyanakkor csökkentette bizonyos maladaptív jelátviteli utak aktivitását. Mindezek következtében a PARP-gátlóval kezelt szívek mind funkcionálisan, mind struktúrálisan lényegesen intaktabbak voltak, mint a kezeletlen szívek. Ráadásul az ACE-gátló enalaprillal összehasonítva a PARP-gátló kezelés hatékonyabbnak bizonyult a myocardialis remodeling kivédésében postinfarktusos szívelégtelenség modellben. Fiatal spontán hipertenzív patkányokban a PARP-gátlóknak a szívizom hypertrophia kialakulásával szembeni védő hatását igazoltuk. Ezen eredményeink publikálásra kerültek már, illetve egyesek még publikálás alatt állnak. Emellett idős spontán hipertenzív patkányokban a pangásos szívelégtelenség kialakulásával szemben is kifejezett védő hatást mutattak a PARP-gátlók, az állatok túlélését is javította a kezelés. Ezen adatain még részben feldolgozásra várnak. Doxorubicin kezelés által kiváltott cardiomyopathia modellben végzett vizsgálatunkból származó minták még feldolgozás alatt állnak. | The effect of poly(ADP-ribose) polymerase (PARP) inhibitors was studied in various experimental heart failure models. We have demonstrated that PARP-inhibitors can moderate the postinfarction myocardial remodeling and can protect against the development of heart failure. We have firstly proved that PARP-inhibitors have a significant effect on signal transduction pathways which play a central role in the development of heart failure. PARP-inhibition activated the prosurvival signal transduction pathways and blocked the activity of several maladaptive signal transduction pathways. Due to these effects, hearts treated with PARP-inhibitors showed better functional and structural features compared to untreated hearts. In addition, PARP-inhibition was more effective against the development of myocardial remodeling in our postinfarction heart failure model compared to ACE-inhibition. In young spontaneous hypertensive rats the protective effect of PARP-inhibitors against the development of myocardial hypertrophy was demonstrated. These results were already published and several data are under publication. Moreover, in adult spontaneous hypertensive rats PARP-inhibition protects against the transition from hypertrophic cardiomyopathy to decompensated heart failure. These results will be published shortly. Finally, tissue samples derived from a toxic (doxorubicin-induced) cardiomyopathy model are yet under measurements

Integrált gyümölcs- és szőlőtermesztés célprogram tapasztalatai a gyöngyösi kistérségben

Az Új Magyarország Vidékfejlesztési Program (ÚMVP) által meghirdetett agrár-környezetgazdálkodási program legnépszer?bb célprogramja a 2010-2014 közötti id?szakban, a Gyöngyösi kistérségben az integrált gyümölcs- és sz?l?termesztés célprogram volt. Kutatásunk során arra voltunk kíváncsiak, hogy az adott gazdaságok milyen szinten voltak erre felkészülve (szakmai ismeretek, technológia stb.), tudtak e alkalmazkodni a szabályokhoz valamint hogyan hatott ez a gazdaságok pénzügyi helyzetére.</jats:p

Responses of Szarvasi-1 energy grass to sewage sludge treatments in hydroponics

Sewage sludge (SS) originating from communal wastewater is a hazardous material but have a potentially great nutritive value. Its disposal after treatment in agricultural lands can be a very economical and safe way of utilization once fast growing, high biomass, perennial plants of renewable energy production are cultivated. Szarvasi-1 energy grass (Elymus elongatus subsp. ponticus cv. Szarvasi-1), a good candidate for this application, was grown in hydroponics in order to assess its metal accumulation and tolerance under increasing SS amendments. The applied SS had a composition characteristic to SS from communal wastes and did not contain any toxic heavy metal contamination from industrial sludge in high concentration. Toxic effects was assessed in quarter strength Hoagland nutrient solution and only the two highest doses (12.5-18.75 g dm-3) caused decreases in root growth, shoot water content and length and stomatal conductance whereas shoot growth, root water content, chlorophyll concentration and the maximal quantum efficiency of photosystem II was unaffected. Shoot K, Ca, Mg, Mn, Zn and Cu content decreased but Na and Ni increased in the shoot compared to the unamended control. The nutritive effect was tested in 1/40 strength Hoagland solution and only the highest dose (12.5 g dm-3) decreased root growth and stomatal conductance significantly while lower doses (1.25-6.25 g dm-3) had a stimulative effect. Shoot K, Na, Fe and Ni increased and Ca, Mg, Mn, Zn and Cu decreased in this treatment. It was concluded that SS with low heavy metal content can be a potentially good fertilizer for high biomass non-food crops such as Szarvasi-1 energy grass

Poli(ADP-ribóz) polimeráz gátló vegyületek hatásmechanizmusának vizsgálata állatkísérletes és rheologiai modelleken = Evaluation of mechanism of action of poly(ADP-ribose) polymerase inhibitor compounds in animal and in rheological models

Kutatásaink során kísérletes szívelégtelenség modellekben vizsgálatuk a poli(ADP-ribóz) polimeráz (PARP) gátlók hatását. Vizsgálatainkkal igazoltuk, hogy PARP-gátlók mérséklik a postinfarctusos remodelinget és védenek a szívelégtelenség kialakulásával szemben. Elsőként igazoltuk, hogy a PARP-gátlók jelentős hatással bírnak a szívelégtelenség pathomechanizmusában alapvető szerepet játszó jelátviteli utakra is. PARP-gátlás fokozta a túlélést segítő, ugyanakkor csökkentette bizonyos maladaptív jelátviteli utak aktivitását. Mindezek következtében a PARP-gátlóval kezelt szívek mind funkcionálisan, mind struktúrálisan lényegesen intaktabbak voltak, mint a kezeletlen szívek. Ráadásul az ACE-gátló enalaprillal összehasonítva a PARP-gátló kezelés hatékonyabbnak bizonyult a myocardialis remodeling kivédésében postinfarktusos szívelégtelenség modellben. Fiatal spontán hipertenzív patkányokban a PARP-gátlóknak a szívizom hypertrophia kialakulásával szembeni védő hatását igazoltuk. Ezen eredményeink publikálásra kerültek már, illetve egyesek még publikálás alatt állnak. Emellett idős spontán hipertenzív patkányokban a pangásos szívelégtelenség kialakulásával szemben is kifejezett védő hatást mutattak a PARP-gátlók, az állatok túlélését is javította a kezelés. Ezen adatain még részben feldolgozásra várnak. Doxorubicin kezelés által kiváltott cardiomyopathia modellben végzett vizsgálatunkból származó minták még feldolgozás alatt állnak. | The effect of poly(ADP-ribose) polymerase (PARP) inhibitors was studied in various experimental heart failure models. We have demonstrated that PARP-inhibitors can moderate the postinfarction myocardial remodeling and can protect against the development of heart failure. We have firstly proved that PARP-inhibitors have a significant effect on signal transduction pathways which play a central role in the development of heart failure. PARP-inhibition activated the prosurvival signal transduction pathways and blocked the activity of several maladaptive signal transduction pathways. Due to these effects, hearts treated with PARP-inhibitors showed better functional and structural features compared to untreated hearts. In addition, PARP-inhibition was more effective against the development of myocardial remodeling in our postinfarction heart failure model compared to ACE-inhibition. In young spontaneous hypertensive rats the protective effect of PARP-inhibitors against the development of myocardial hypertrophy was demonstrated. These results were already published and several data are under publication. Moreover, in adult spontaneous hypertensive rats PARP-inhibition protects against the transition from hypertrophic cardiomyopathy to decompensated heart failure. These results will be published shortly. Finally, tissue samples derived from a toxic (doxorubicin-induced) cardiomyopathy model are yet under measurements

The effect of mulching on the abundance and diversity of ground beetle assemblages in two hungarian potato fields

The benefits of mulching in potato (Solanum tuberosum L.) production are manifold, such as it provides shelters for natural enemies of pests. The aim of our study was to detect the effect of two organic mulch types on the abundance, diversity and species composition of carabid beetles. Our potato plots were located in two sites with similar habitats including similar soil characteristics. Each plot was treated with hay and leaf litter mulch (hay, leaf, control) with 4 replications at each site. It resulted in 24 samples in each study site annually. Carabid beetles were collected by using pitfall traps in between 2011-2013. We found that due to mulching a larger and more diverse carabid population occurred on potato plots. Both mulching types increased the total number of carabids captured having a 17% higher abundance on hay mulched plots and 14% higher abundance on leaf litter mulched plots. According to the results 28 % of the collected species was found only on mulched plots, whereas only 13 % of the captured species were found only on unmulched areas. For some of the species, especially for Brachinus crepitans (L.), the number of individuals was significantly higher on mulched plots. The two different mulching materials had very similar effects on assemblages of carabid species. The species composition of ground beetles was considerably affected by the two locations, and to a lesser extent by the different time periods. While the dominant species of Budaörs was B. crepitans, the most abbundant carabid beetle at Hidegkút belonged to genus Harpalus. Neither hay nor leaf litter were able to constantly increase the biodiversity of the carabid assemblages on potato plots, because the effect of the two years overwrote the between-treatment effects on carabid diversity. The positive effect of organic mulching on carabid diversity however, was found significant in both years of 2011 and 2012

Re-appearance of Palingenia longicauda (Olivier, 1791) (Ephemeroptera, Palingeniidae) on the Hungarian Danube section – range recovery of the species at the Rába-district

Swarming long-tailed mayflies (Palingenia longicauda) were observed above the former rehabilitated Gönyû-sidearm of the river Danube on the 12–13th of June 2015, which was the first observation of the species at the Hungarian Danube section, since its disappearance. Both subimago molts of the males, and females doing their compensation flight were observed, thus development of the long-tail mayflies seems to be locally certain. Description of the swarming and summarized evaluation of the conservationtrends of the long-tailed mayfly at the Rába-district are added below