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1.

001-es BibID:BIBFORM078411
035-os BibID:(PMID)30734834 (WoS)000472512500009 (Scopus)85061242629
Első szerző:Baksa Brigitta (fogorvos)
Cím:Characterization of functional subgroups among genetically identified cholinergic neurons in the pedunculopontine nucleus / Baksa B., Kovács A., Bayasgalan T., Szentesi P., Kőszeghy Á., Szücs P., Pál B.
Dátum:2019
ISSN:1420-682X
Megjegyzések:The pedunculopontine nucleus (PPN) is a part of the reticular activating system which is composed of cholinergic, glutamatergic and GABAergic neurons. Early electrophysiological studies characterized and grouped PPN neurons based on certain functional properties (i.e. the presence or absence of the A-current, spike latency, and low threshold spikes). Although other electrophysiological characteristics of these neurons were also described (as high threshold membrane potential oscillations, great differences in spontaneous firing rate and the presence or absence of the M-current), systematic assessment of these properties and correlation of them with morphological markers are still missing. In this work, we conducted electrophysiological experiments on brain slices of genetically identified cholinergic neurons in the PPN. Electrophysiological properties were compared with rostrocaudal location of the neuronal soma and selected morphometric features obtained with post hoc reconstruction. We found that functional subgroups had different proportions in the rostral and caudal subregions of the nucleus. Neurons with A-current can be divided to early-firing and late-firing neurons, where the latter type was found exclusively in the caudal subregion. Similar to this, different parameters of high threshold membrane potential oscillations also showed characteristic rostrocaudal distribution. Furthermore, based on our data we propose that high threshold oscillations rather emerge from neuronal somata and not from the proximal dendrites. In summary, we demonstrated the existence and spatial distribution of functional subgroups of genetically identified PPN cholinergic neurons, which are in accordance with differences found in projection and in vivo functional findings of the subregions. Being aware of functional differences of PPN subregions will help the design and analysis of experiments using genetically encoded opto- and chemogenetic markers for in vivo experiments.
Tárgyszavak:Orvostudományok Elméleti orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
pedunculopontine nucleus
cholinergic neuron
spike delay
A-current
rostrocaudal gradient
high threshold oscillation
Megjelenés:Cellular And Molecular Life Sciences. - 76 : 14 (2019), p. 2799-2815. -
További szerzők:Kovács Adrienn (1989-) (molekuláris biológus) Bayasgalan, Tsogbadrakh (1983-) (Általános orvos) Szentesi Péter (1967-) (élettanász) Kőszeghy Áron (1983-) (Ph.D hallgató, élettanász) Szűcs Péter (1974-) (kutatóorvos) Pál Balázs (1975-) (élettanász)
Pályázati támogatás:KTIA_13_NAP-A-I/10
Egyéb
2017-1.2.1-NKP-2017-00002
Egyéb
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2.

001-es BibID:BIBFORM095575
035-os BibID:(cikkazonosító)707789 (WoS)000683012200001 (Scopus)85112145519 (PubMed)34381336
Első szerző:Bayasgalan, Tsogbadrakh (Általános orvos)
Cím:Alteration of mesopontine cholinergic function by the lack of KCNQ4 subunit / Bayasgalan T., Stupniki S., Kovács A., Csemer A., Szentesi P., Pocsai K., Dionisio L., Spitzmaul G., Pál B.
Dátum:2021
ISSN:1662-5102
Tárgyszavak:Orvostudományok Elméleti orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Megjelenés:Frontiers in Cellular Neuroscience. - 15 (2021), p. 707789. -
További szerzők:Stupniki, S. Kovács Adrienn (1989-) (molekuláris biológus) Csemer Andrea (1994-) (molekuláris biológus) Szentesi Péter (1967-) (élettanász) Pocsai Krisztina (1978-) (élettanász) Dionisio, L. Spitzmaul, G. Pál Balázs (1975-) (élettanász)
Internet cím:Intézményi repozitóriumban (DEA) tárolt változat
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3.

001-es BibID:BIBFORM082078
035-os BibID:(WoS)000509325000003 (Scopus)85071744080 (PubMed)31469725
Első szerző:Kovács Adrienn (molekuláris biológus)
Cím:Orexinergic actions modify occurrence of slow inward currents on neurons in the pedunculopontine nucleus / Kovács Adrienn, Baksa Brigitta, Bayasgalan Tsogbadrakh, Szentesi Péter, Csemer Andrea, Pál Balázs
Dátum:2019
ISSN:0959-4965
Megjegyzések:Orexins are neuromodulatory peptides of the lateral hypothalamus which regulate homeostatic mechanisms including sleep-wakefulness cycles. Orexinergic actions stabilize wakefulness by acting on the nuclei of the reticular activating system, including the pedunculopontine nucleus. Orexin application to pedunculopontine neurons produces a noisy tonic inward current and an increase in the frequency and amplitudes of excitatory postsynaptic currents. In the present project, we investigated orexinergic neuromodulatory actions on astrocyte-mediated neuronal slow inward currents of pedunculopontine neurons and their relationships with tonic currents by using slice electrophysiology on preparations from mice. We demonstrated that, in contrast to several other neuromodulatory actions and in line with literature data, orexin predominantly elicited a tonic inward current. A subpopulation of the pedunculopontine neurons possessed slow inward currents. Independently from the tonic currents, actions on slow inward currents were also detected, which resembled other neuromodulatory actions: if slow inward currents were almost absent on the neuron, orexin induced an increase of the charge movements by slow inward currents, whereas if slow inward current activity was abundant on the neurons, orexin exerted inhibitory action on it. Our data support the previous findings that orexin elicits only inward currents in contrast with cannabinoid, cholinergic or serotonergic actions. Similar to the aforementioned neuromodulatory actions, orexin influences slow inward currents in a way depending on control slow inward current activity. Furthermore, we found that orexinergic actions on slow inward currents are similarly independent from its actions on tonic currents, as it was previously found with other neuromodulatory agonists.
Tárgyszavak:Orvostudományok Elméleti orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
neuromodulation
orexin
pedunculopontine nucleus
slow inward current
tonic inward current
Megjelenés:Neuroreport. - 30 : 14 (2019), p. 933-938. -
További szerzők:Baksa Brigitta (1989-) (fogorvos) Bayasgalan, Tsogbadrakh (1983-) (Általános orvos) Szentesi Péter (1967-) (élettanász) Csemer Andrea (1994-) (molekuláris biológus) Pál Balázs (1975-) (élettanász)
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4.

001-es BibID:BIBFORM065772
Első szerző:Oláh Tamás (élettanász)
Cím:Cannabinoid signalling inhibits sarcoplasmic Ca2+ release and regulates excitation-contraction coupling in mammalian skeletal muscle / Tamás Oláh, Dóra Bodnár, Adrienn Tóth, János Vincze, János Fodor, Barbara Reischl, Adrienn Kovács, Olga Ruzsnavszky, Beatrix Dienes, Péter Szentesi, Oliver Friedrich, László Csernoch
Dátum:2016
ISSN:0022-3751
Tárgyszavak:Orvostudományok Elméleti orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban
Megjelenés:Journal Of Physiology-London 594 : 24 (2016), p. 7381-7398. -
További szerzők:Bodnár Dóra (1987-) (molekuláris biológus) Tóth Adrienn (1988-) (molekuláris biológus, élettanász) Vincze János (1947-) (biofizikus) Fodor János (1973-) (élettanász, biotechnológus) Reischl, Barbara Kovács Adrienn (1989-) (molekuláris biológus) Ruzsnavszky Olga (1983-) (élettanász) Dienes Beatrix (1972-) (élettanász, molekuláris biológus) Szentesi Péter (1967-) (élettanász) Friedrich, Oliver Csernoch László (1961-) (élettanász)
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5.

001-es BibID:BIBFORM062408
Első szerző:Oláh Tamás (élettanász)
Cím:CB1 cannabinoid receptors are involved in the regulation of excitation-contraction coupling in mammalian skeletal muscle / Oláh Tamás, Bodnár Dóra, Tóth Adrienn, Fodor János, Kovács Adrienn, Farkas Anna, Nádró Bíborka, Szentesi Péter, Csernoch László
Dátum:2015
Megjegyzések:The presence of CB1 cannabinoid receptors (CB1R) has been shown in skeletal muscle, but it is yet to be cleared whether they have any significance in the regulation of contractions. CB1-knockout (CB1-KO) mice showed hypoactivity, however, it is questionable whether this was solely due to effects on the central nervous system or impairment of muscle function also contributes. Our aim was to investigate the role of CB1R in mammalian skeletal muscle, and the effects of cannabinoid drugs on Ca2+ transients. Running ability of control and CB1-KO mice was studied by activity-wheel-tests while in vivo muscle force of the animals was measured by grip-tests and hang-tests. Ca2+ transients evoked by KCl-depolarization in the presence and absence of cannabinoid agonists were investigated on flexor digitorum brevis (FDB) fibers of control and CB1-KO mice. CB1-KO mice performed worse as compared to control in all behavior tests applied. In contrast, depolarization-evoked Ca2+ transients were significantly higher in FDB fibers isolated from CB1-KO mice (848 ? 98 nM, n = 47) compared to control (376 ? 60 nM, n = 32, p\0.01). When KCl-evoked Ca2+ transients were repeated on control FDB fibers in the absence and presence of the CB1 agonist WIN55,212 (WIN), the transients after WIN treatment were significantly smaller (44 ? 7 % of the first transient, n = 27) than in untreated (79 ? 5 % of the first transient, n = 32, p\0.01) fibers. Our observations suggest that CB1R-mediated signaling contributes to the regulation of excitation?contraction coupling and skeletal muscle contractions. Nevertheless, the effects mediated by the absence of CB1R in the central nervous system on the inferior muscle performance of CB1-KO mice in vivo cannot be ruled out. These results can contribute to the identification of the side effects of medically used cannabinoid drugs on skeletal muscle.
Tárgyszavak:Orvostudományok Elméleti orvostudományok idézhető absztrakt
Skeletal muscle
CB1 cannabinoid receptor
Excitation?contraction coupling
Megjelenés:Journal of muscle research and cell motility. - 36 (2015), p. 129. -
További szerzők:Bodnár Dóra (1987-) (molekuláris biológus) Tóth Adrienn (1988-) (molekuláris biológus, élettanász) Fodor János (1973-) (élettanász, biotechnológus) Kovács Adrienn (1989-) (molekuláris biológus) Farkas Anna (1983-) Nádró Bíborka (1992-) (általános orvos) Szentesi Péter (1967-) (élettanász) Csernoch László (1961-) (élettanász)
Pályázati támogatás:TÁMOP-4.2.4.A/2-11-1-2012-0001
TÁMOP
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6.

001-es BibID:BIBFORM056500
Első szerző:Oláh Tamás (élettanász)
Cím:Cannabinoids and muscle weakness - Investigating the function of CB1 receptors in mammalian skeletal muscle / T. Oláh, D. Bodnár, A. Tóth, J. Fodor, A. Kovács, A. Farkas, B. Nádró, P. Szentesi, L. Csernoch
Dátum:2014
Megjegyzések:The presence of CB1 cannabionid receptors (CB1R) has been shown in skeletal muscle, but it is yet to be cleared whether they have any significance in the regulation of muscle contractions. Muscle contractions are evoked by the elevation of intracellular Ca2+ concentration ([Ca2+]i) during a process called excitation-contraction coupling. CB1-mediated signaling can interefere with this process in several ways. CB1-knockout (CB1-KO) mice showed hypoactivity, however it is questionable whether this was solely originated by effects on the central nervous system or impairment of skeletal muscle function also contributes to this. It was also shown that treatment by cannabinoid agonists attenuates the contractions of frog skeletal muscle. Our aim was to study the role of CB1R in mammalian skeletal muscle, and the effects of cannabinoid drugs on Ca2+-transients.Running ability (average and maximal speed, distance) of control and CB1-KO mice was tested by activity-wheel-tests and in vivo muscle force of the animals was tested by grip-tests and hang-tests. Ca2+ transients evoked by KCl-depolarization in the presence of cannabinoid agonists were studied on enzymatically isolated flexor digitorum brevis (FDB) fibers of control and CB1-KO mice.CB1-KO mice performed worse in all the behavior tests compared to control. Depolarization-evoked Ca2+-transients were significantly higher in FDB fibers isolated from CB1-KO mice (847.8?98.2 nM, n=47) compared to control (375.6?59.9 nM, n=32, p<0.01). On control FDB the second transients after the CB1 agonist WIN55,212 treatment were significantly smaller than in untreated fibers.On the basis of the [Ca2+]i measurements we can conclude that CB1R-mediated signaling contributes to the regulation of skeletal muscle contractions, but as the main cause of the worse muscle performance of CB1-KO mice the effects mediated by the absence of CB1R in the central nervous system can neither be ruled out. These results can contribute to the identification of the side effects of medically used cannabinoid drugs on skeletal muscle.
Tárgyszavak:Orvostudományok Elméleti orvostudományok idézhető absztrakt
CB1 receptor
vázizom
Ca2+ tranziens
KO egér
Megjelenés:Acta Physiologica. - 211 : Suppl (2014), p. 82-83. -
További szerzők:Bodnár Dóra (1987-) (molekuláris biológus) Tóth Adrienn (1988-) (molekuláris biológus, élettanász) Fodor János (1973-) (élettanász, biotechnológus) Kovács Adrienn (1989-) (molekuláris biológus) Farkas Anna (1983-) Nádró Bíborka (1992-) (általános orvos) Szentesi Péter (1967-) (élettanász) Csernoch László (1961-) (élettanász)
Pályázati támogatás:TÁMOP-4.2.4. A/2-11-1-2012-0001
TÁMOP
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