69 research outputs found
Juvenile Huntington’s disease skin fibroblasts respond with elevated parkin level and increased proteasome activity as a potential mechanism to counterbalance the pathological consequences of mutant Huntingtin protein
Huntington’s disease (HD) is an inherited neurodegenerative disorder, caused by an abnormal polyglutamine (polyQ) expansion in the huntingtin protein (Htt). Mitochondrial dysfunction and impairment of the ubiquitin-proteasome system (UPS) are hallmarks of HD neurons. The extraneural manifestations of HD are still unclear. We investigated the crosstalk between mitochondria and proteolytic function in skin fibroblasts from juvenile HD patients. We found reduced mitosis, increased cell size, elevated ROS and increased mitochondrial membrane potential in juvenile HD fibroblasts, while cellular viability was maintained. Mitochondrial OXPHOS analysis did not reveal significant differences compared to control. However, the level of mitochondrial fusion and fission proteins was significantly lower and branching in the mitochondria network was reduced. We hypothesized that juvenile HD fibroblasts counterbalance cellular damage and mitochondrial network deficit with altered proteasome activity to promote cell survival. Our data reveal that juvenile HD fibroblasts exhibit higher proteasome activity, which was associated with elevated gene and protein expression of parkin. Moreover, we demonstrate elevated proteasomal degradation of the mitochondrial fusion protein Mfn1 in diseased cells compared to control cells. Our data suggest that juvenile HD fibroblasts respond to mutant polyQ expansion of Htt with enhanced proteasome activity and faster turnover of specific UPS substrates to protect cells
ExtenzĂv szántĂłk gyomcönolĂłgiai vizsgálata Észak-nyugat DunántĂşlon = Phytosociological survey of weed communities on extensive fields in North-western Hungary
A DunántĂşli-közĂ©phegysĂ©g Ă©s a Nyugat-Magyarországi peremvidĂ©k extenzĂv vetĂ©seiben a következĹ‘ vegetáciĂłtĂpusok leĂrására kerĂĽlt sor: Nyári aszpektusban bázikus-meszes vályogos talajon a Camelino-Anthemidetum caucalietosum; semleges talajon (vagy a nagyobb mĂ©rvű intenzifikáciĂłval) a Camelino-Anthemidetum typicum, savanyĂş talajon pedig a Camelino-Anthemidetum scleranthetosum. Ezeket a tĂpusokat, bázikus homokon a Sisymbrio-Anthemidetum, mĂg savanyĂş homokon a Spergulo-Anthemidetum váltja fel. A szubatlantikus klĂma befolyása alatt savanyĂş vályog- Ă©s agyagtalajokon az Aphano-Matricarietum scleranthetosum uralkodik. A Capsello-Descurainietum a növekvĹ‘ intenzifikáciĂłval alakul ki a Camelino-Anthemidetum termĹ‘helyĂ©n. A Camelino-Anthemidetum-ot Ĺ‘szi aszpektusban a tarlĂłkon a Stachyo-Setarietum váltja fel, mĂg az Aphano-Matricarietum termĹ‘helyĂ©n a Chenopodio-Oxalidetum a jellemzĹ‘ tarlĂłszövetkezet. A kapáskultĂşrákban az egĂ©sz vizsgált terĂĽleten, bár sokszor csak nagyon elszegĂ©nyedett formában az Echinochloo-Setarietum terjedt el. | In the surveyed area the following vegetation units have been distinguished: Camelino-Anthemidetum caucalidetosum as summer-association on loamy calcareous soils, Camelino-Anthemidetum typicum on neutral soils (or by larger intensification), Camelino-Anthemidetum scleranthetosum on acidic soils. These units are substituted by Sisymbrio-Anthemidetum on basic sand, while by Spergulo-Anthemidetum on acidic sand. Under the effect of Submediterranean climate Aphano-Matricarietum scleranthetosum on acidic loam and clay prevails. Capsello-Descurainietum evolves with increasing intensification in habitat of Camelino-Anthemidetum. Camelino-Anthemidetum is substituted by Stachyo-Setarietum as autumn-association on stubble fields while in the habitat of Aphano-Matricarietum, Chenopodio-Oxalidetum is the typical stubble community. In row crop fields Echinochloo-Setarietum is the most frequent association
PerifĂ©riás Ă©s centrális receptorok rĂ©szvĂ©tele opioidok fájdalomcsillapĂtĂł hatásában Ă©s mellĂ©khatás spektrumában.Korai drog expoziciĂł (perinatális Ă©s adoleszcensz) hatásának vizsgálata patkányon = On the role of central and peripheral receptors in the antinociceptive action and side effects of opioids.The influence of early (perinatal and in adolescent age) drug exposition on antinociception
A fájdalom terápiájának megoldása sĂĽrgetĹ‘ Ă©s releváns igĂ©ny. Korábban publikáltunk nĂ©hány az agyba limitáltan penetrálĂł morfinant. Jelen munkában kb. 30 Ăşj származĂ©kot vizsgáltunk. PerifĂ©riás vs centrális analgetikus aktivitásuk 40-400, a rosszul penetrálĂł opioid antagonisták gátolják hatásukat, intrinsic efficacy-juk magas (perifĂ©riás hatĂ©konyság markere az általunk kidolgozott mĂłdszer szerint ), gátlĂł hatásuk patkány DRG sejteken perifĂ©riás támadáspont mellett szĂłl. Morfintoleráns egĂ©rben spinálisan adva a DPDPE gátolja, mĂg TIPPszi potencĂrozza a DAMGO antinociceptĂv hatását. Patkányon mind naiv mind toleráns állatban a hatás potencirozĂł. A prodynorfin gĂ©nexpressziĂł Ă©s dinorfin szint a dependenciáért felelĹ‘s agyi rĂ©giĂłkban mĂłdosul perifĂ©riás opioidok hatására. A perinatalisan drog expozĂciĂłnak kitett patkány anyák korai adoleszcens korĂş utĂłdainak testsĂşlya, adaptáciĂłs kĂ©pessĂ©ge szignifikánsan csökkent, erĹ‘ltetett Ăşszás teszten depressziĂłt jeleztek, fizikálisan dependensekkĂ©, vulnerábilissá váltak. Az anyai viselkedĂ©s romlott. KonklĂşziĂł: Ăşj morfinánok segĂtsĂ©gĂ©vel a C-6 szubsztituciĂł prominens szerepĂ©t demonstráltuk a perifĂ©riás hatĂ©konyság erĹ‘södĂ©sĂ©ben, a preemptiv analgĂ©ziában, limitált lĂ©gzĂ©sdepressziĂł Ă©s pszicholĂłgiai dependencia mellett. Az eredmĂ©ny elmĂ©leti jelentĹ‘sĂ©ge mellett gyakorlati fontosságĂş a klinikum számára. Kimutattuk továbbá, hogy perinatálisan stimuláns ill. opioid kábĂtĂłszerekkel kezelt patkányok utĂłdai vulnerábilissá válnak, az abĂşzus veszĂ©lye nĹ‘. | There is a permanent and relevant need to manage pain. Previously we published opioids with limited access to the brain. 30 new derivatives were studied in rodents and found to be more potent analgesics, than morphine (Mo). Their peripheral vs central activites were between 40-400, the analgesic action was inhibited by poorly penetrating antagonists contrast to Mo, they block DRG cells, their intrinsic efficacy (a good marker of peripheral activity), is much higher than Mo assessed by a method elaborated by us, suggesting a peripheral site of action. DPDP administered spinally to Mo tolerant mice inhibited, while TIPPsi potentiated DAMGO analgesia.. We observed potentiation both in naive and tolerant rat. Prodynorphin gene expression and dynorphin level in brain regions responsible for the development of dependence were modified by opioids. The body weight, the adaptive behaviour of early adolescent offspring of perinatally Mo and ecstasy exposed dams decreased, they show depression in swimming test, they became physically dependent, and vulnerable to addiction. The maternal behavior of dams was disturbed. Conclusion: new data on the mechanisms of preemptive analgesia were obtained by new C-6 substituted morphinans. Respiratory depression and psychological dependence were limited. This finding beside its basic importance has practical importance too.Furthermore the offspring of dams perinatally exposed to substances of drug abuse became vulnerable and prone to be addict.
VĂzibogarak Ă©s vĂzipoloskák vándorlási ritmusának vizsgálata (Coleoptera, Heteroptera) I. Az egyedszám Ă©s a fajgazdagság változásai
Vizsgálataink során a vĂzibogarak Ă©s a vĂzipoloskák vándorlási szokásait, vándorlásuk napszakos Ă©s Ă©vszakos ritmusát tanulmányoztuk. Heti gyakoriságĂş, 24 Ăłra idĹ‘tartamĂş, ĂłránkĂ©nti bontásban vĂ©gzett mintavĂ©teleink során 9X3 mĂ©teres fekete fĂłlián csapdáztuk a rovarokat. A begyűjtött 10 292 egyed 86 taxonhoz (68 Coleoptera, 18 Heteroptera) tartozott. Ebben a dolgozatban az egyes mintavĂ©teli napok Ă©s mintavĂ©teli Ăłrák átlagos egyedszámának Ă©s fajszámának alakulása alapján elemezzĂĽk a vĂzirovarok szezonális vándorlási ritmusát
Magyar TanĂtĂłkĂ©pzĹ‘ 16 (1901) 01
Magyar TanĂtĂłkĂ©pzĹ‘
A TanĂtĂłkĂ©pzĹ‘-intĂ©zeti Tanárok Országos EgyesĂĽletĂ©nek közlönye
16. Ă©vfolyam, 01. fĂĽzet
Budapest, 1901. január h
Shedding light on the pharmacological interactions between µ-opioid analgesics and angiotensin receptor modulators:A new option for treating chronic pain
The current protocols for neuropathic pain management include µ-opioid receptor (MOR) analgesics alongside other drugs; however, there is debate on the effectiveness of opioids. Nevertheless, dose escalation is required to maintain their analgesia, which, in turn, contributes to a further increase in opioid side effects. Finding novel approaches to effectively control chronic pain, particularly neuropathic pain, is a great challenge clinically. Literature data related to pain transmission reveal that angiotensin and its receptors (the AT1R, AT2R, and MAS receptors) could affect the nociception both in the periphery and CNS. The MOR and angiotensin receptors or drugs interacting with these receptors have been independently investigated in relation to analgesia. However, the interaction between the MOR and angiotensin receptors has not been excessively studied in chronic pain, particularly neuropathy. This review aims to shed light on existing literature information in relation to the analgesic action of AT1R and AT2R or MASR ligands in neuropathic pain conditions. Finally, based on literature data, we can hypothesize that combining MOR agonists with AT1R or AT2R antagonists might improve analgesia
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