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1.

001-es BibID:BIBFORM029085
Első szerző:Antal Miklós (orvos, anatómus)
Cím:Direct evidence of an extensive GABAergic innervation of the spinal dorsal horn by fibres descending from the rostral ventromedial medulla / M. Antal, M. Petkó, E. Polgár, C. W. Heizmann, J. Storm-Mathisen
Dátum:1996
Megjegyzések:A long line of studies emphasizes the contribution of serotonergic fibres descending from the rostral ventromedial medulla in the control of spinal nociceptive information processing. A growing body of evidence, however, suggests that the relative contribution of serotonin to the mediation of spinal neuronal activity from the rostral ventromedial medulla may require re-evaluation. It has recently been substantiated that, in addition to the serotonergic fibres, the spinal dorsal horn receives an abundant non-serotonergic projection from the rostral ventromedial medulla. Furthermore, stimulation in the rostral ventromedial medulla could result in a powerful inhibition of nociceptive spinothalamic tract cells without any detectable serotonin release in the dorsal horn. After labelling raphe-spinal axons and axon terminals in the rat by iontophoretic injections of the anterograde axonal tracer Phaseolus vulgaris leucoagglutinin into the central region of the rostral ventromedial medulla (nucleus raphe magnus) and revealing GABA and glycine immunoreactivities of the labelled raphe-spinal terminals and their postsynaptic targets by postembedding immunocytochemical methods, here we demonstrate an extensive GABAergic projection from the rostral ventromedial medulla to the spinal dorsal horn. We show that the majority of the labelled raphe-spinal terminals in laminae I-IIo and IV-V contain GABA and some of the GABA-immunoreactive terminals are also immunoreactive for glycine. We also disclose that GABA-immunoreactive raphe-spinal terminals establish synaptic contacts primarily with GABA- and glycine-negative, presumably excitatory, spinal neurons, including Calbindin-D28k- as well as parvalbumin-immunoreactive cells in both laminae I-IIo and IV-V. The results suggest that volleys in fibres descending from the rostral ventromedial medulla may evoke GABA release from raphe-spinal terminals, and the released GABA, in some cases probably acting together with glycine, might play a crucial, as yet mostly unidentified, role in the inhibition of nociceptive information processing in the dorsal horn of the spinal cord.
Tárgyszavak:Orvostudományok Elméleti orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban
egyetemen (Magyarországon) készült közlemény
Megjelenés:Neuroscience. - 73 : 2 (1996), p. 509-518. -
További szerzők:Petkó Mihály (1943-) (orvos, neurobiológus) Polgár Erika Heizmann, C. W. Storm-Mathisen, John
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2.

001-es BibID:BIBFORM029080
Első szerző:Antal Miklós (orvos, anatómus)
Cím:Development of calbindin-D28k immunoreactive neurons in the embryonic chick lumbosacral spinal cord / Miklós Antal, Erika Polgár
Dátum:1993
Megjegyzések:The development of immunoreactivity for the calcium-binding protein calbindin-D28k (CaB) was investigated in the embryonic and hatched chick lumbosacral spinal cord. CaB-immunoreactive neurons were revealed in the dorsal and ventral horns as well as in the intermediate grey matter from early stages of neuronal development. CaB immunoreactivity was first detected in large neurons in the presumptive dorsal horn at embryonic day 5, while small neurons in the lateral dorsal horn were the last to appear, at embryonic day 10. We have identified and traced the morphological maturation of six CaB-immunoreactive cell groups, three in the dorsal horn and three in the ventral horn. In the dorsal horn these groups were (1) large neurons in the lateral dorsal horn (laminae I and IV), (2) small neurons in the lateral dorsal horn (lamina II), and (3) small neurons in the medial dorsal horn (lamina III). All three groups were present throughout the entire length of the lumbosacral spinal cord and showed persistent CaB immunoreactivity. In the ventral horn, CaB-immunoreactive neurons were classified into the following three categories: (1) Neurons dorsal to the lateral motor column (lamina VII). These neurons were present exclusively in the upper lumbosacral segments (LS1-3), and they showed steady CaB immunoreactivity during their maturation. (2) Neurons at the dorsomedial aspect of the lateral motor column (at the border of laminae VII and IX). This population of neurons was characteristic of the lower segments of the lumbosacral cord (LS5-7) and presented transient CaB expression. (3) Neurons within the lateral motor column (lamina IX). These neurons were dispersed throughout the length of the lumbosacral spinal cord. They were three to four times more numerous in the upper than in the lower lumbosacral segments, and their numbers declined throughout LS1-7 as the animal matured. The characteristic features of the development of neurons immunoreactive for CaB are discussed and correlated with previous neuroanatomical and physiological studies concerning sensory and motor functions of the developing chick spinal cord.
Tárgyszavak:Orvostudományok Elméleti orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban
egyetemen (Magyarországon) észült közlemény
Megjelenés:European Journal of Neuroscience. - 5 : 7 (1993), p. 782-794. -
További szerzők:Polgár Erika
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3.

001-es BibID:BIBFORM029073
Első szerző:Antal Miklós (orvos, anatómus)
Cím:Distribution of GABA immunoreactivity in the optic tectum of the frog : a light and electron microscopic study / M. Antal
Dátum:1991
ISSN:0306-4522
Megjegyzések:GABA immunoreactivity was studied in the optic tectum of the frog, Rana esculenta, by postembedding immunohistochemical methods at the light and electron microscopic levels. Nearly one-third of the total population of tectal cells appeared to be GABA-immunoreactive. The proportion of stained neurons was highest in layer 9 (61%), and they occurred less frequently in layers 7 (21%) and 6 (27%). Stained perikarya represented a population of small neurons with a diameter of 8-10 microns. Large cell bodies in layer 7 or at the top of layer 6, and cells of origin of the mesencephalic trigeminal tract in layer 2, were devoid of labelling. Axon terminals and dendrites displaying immunoreactivity for GABA were observed in all of the plexiform layers. On the basis of ultrastructural characteristics two types of GABA-positive axon terminals and two variations of GABA-immunoreactive dendrites were distinguished. Synaptic relations of GABA-immunoreactive and GABA-negative axons as well as dendrites were also studied. Besides a wide variety of axodendritic synapses, dendrodendritic synaptic appositions were also revealed. The results suggest that various inhibitory mechanisms are involved in tectal circuits, which have to be incorporated into future neuronal models concerning visual information processing in the optic tectum of the frog.
Tárgyszavak:Orvostudományok Elméleti orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban
egyetemen (Magyarországon) készült közlemény
Megjelenés:Neuroscience. - 42 : 3 (1991), p. 879-891. -
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4.

001-es BibID:BIBFORM029094
Első szerző:Antal Miklós (orvos, anatómus)
Cím:Expression of hyperpolarization-activated and cyclic nucleotide-gated cation channel subunit 2 in axon terminals of peptidergic nociceptive primary sensory neurons in the superficial spinal dorsal horn of rats / Antal, M., Papp, I., Bahaerguli, N., Veress, G., Vereb, G.
Dátum:2004
Megjegyzések:Hyperpolarization-activated cyclic nucleotide-gated cation channel proteins (HCN1-4), which are potentially able to modulate membrane excitability, are abundantly expressed by neurons in spinal dorsal root ganglia (DRG). In the present experiment, we investigated whether HCN2 protein is confined exclusively to the perikarya of DRG neurons or is transported from the somata to the central axons of DRG neurons that terminate in the spinal dorsal horn. Using immunohistochemical methods, we have demonstrated that laminae I-IIo of the superficial spinal dorsal horn of the adult rat spinal cord show a strong punctate immunoreactivity for HCN2. Dorsal rhizotomy resulted in a complete loss of immunostaining in the dorsal horn, suggesting that HCN2 is confined to axon terminals of primary afferents. In double labelling immunohistochemical studies, we have also shown that HCN2 widely co-localizes with calcitonin gene-related peptide, but is almost completely segregated from isolectin-B4 binding, indicating that HCN2 is primarily expressed in peptidergic nociceptive primary afferents. The expression of HCN2 in central terminals of peptidergic primary afferents was also verified with electron microscopy. Utilizing the pre-embedding nanogold method, we found that HCN2 is largely confined to axon terminals with dense-core vesicles. Within these terminals, some of the silver grains marking the accurate location of HCN2 molecules were associated with the cell membrane, and others were scattered in the axoplasm. Within the cell membrane, HCN2 was found almost exclusively in extrasynaptic locations. The results suggest that HCN2 may contribute to the modulation of membrane excitability of nociceptive primary afferent terminals in the spinal dorsal horn.
Tárgyszavak:Orvostudományok Elméleti orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban
Megjelenés:The European Journal of Neuroscience 19 : 5 (2004), p. 1336-1342. -
További szerzők:Papp Ildikó (1976-) (biológus) Bahaerguli, Niyazi Veress Gábor (1971-) (neurobiológus) Vereb György (1965-) (biofizikus, orvos)
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5.

001-es BibID:BIBFORM028807
Első szerző:Antal Miklós (orvos, anatómus)
Cím:The application of cobalt labelling to electron microscopic investigations of serial sections / Antal M.
Dátum:1984
ISSN:0165-0270
Megjegyzések:The cobalt labelling technique can be applied to ultrathin serial sections and subsequent electron microscopical investigations with the following modifications: a prolonged, up to 12 h, fixation of the tissue in aldehydes; a shortened, 15 min, postfixation in OsO4; embedding in soft resin block by using a higher proportion of plasticizer in the polimerizing mixture; mounting of 5 micrometers thick serial sections between two layers of Agar-Agar coatings; performing the intensification of the Agar section-Agar sandwich with a physical developer containing a low percentage of the reductive agent; reembedding selected thick sections for ultrathin serial sectioning and staining with uranile acetate and lead citrate. The technique unambiguously shows all labelled profiles, and preserves the fine structural details of the surrounding tissues.
Tárgyszavak:Orvostudományok Elméleti orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban
Megjelenés:Journal Of Neuroscience Methods. - 12 : 1 (1984), p. 69-77. -
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6.

001-es BibID:BIBFORM028803
Első szerző:Antal Miklós (orvos, anatómus)
Cím:Longitudinal extent of dorsal root fibres in the spinal cord and brain stem of the frog / Antal M., Tornai I., Székely G.
Dátum:1980
ISSN:0306-4522
Megjegyzések:The longitudinal arrangement of dorsal root fibres was investigated with a modified cobalt labelling technique in the spinal cord and brain stem of frogs. The topographical order of dorsal root fibres in the dorsal white column closely resembles the well-known scheme of the mammalian spinal cord. A significant difference between frogs and mammals is the extension of fibres up to the cerebellar plate. The ascending fibres of different origin are organized in concentric rings in the medulla. An oval-shaped area and a triangular area in the dorsal horn, and the motor horn, receive fibre collaterals in the spinal cord. Thoracic dorsal root fibres terminate exclusively in the oval-shaped area. Fibre terminations clearly outline the dorsal column nuclei which begin in the obex region and end at the level of the glossopharyngeal nucleus. The spinal nucleus of the trigeminus is richly supplied by both thin and thick calibre dorsal root fibres in its entire rostrocaudal extension. Two parts of the reticular formation receive dorsal root fibres; the first is in the dorsal gray matter ventral and lateral to the solitary fascicle in the medulla, the second is the lateral reticular zone. In the vestibular region, the medial, lateral and superior vestibular nuclei are innervated by dorsal root fibres. The granular layer of the cerebellum receives a significant contingent of dorsal root fibres. Fibres terminating in the vestibular region and in the cerebellum arise from limb-innervating spinal ganglia. The results indicate a close similarity in the longitudinal arrangement of dorsal root fibres in frogs and in higher vertebrates. The several collaterals that terminate in the hindbrain may modulate the function of the receiving structures. On the basis of present and previous findings the aggregation of primary sensory fibres and the convergence of their terminations are surveyed in the hindbrain.
Tárgyszavak:Orvostudományok Elméleti orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban
egyetemen (Magyarországon) készült közlemény
Megjelenés:Neuroscience. - 5 : 7 (1980), p. 1311-1322. -
További szerzők:Tornai István (1954-) (belgyógyász, gasztroenterológus) Székely György (1926-2017) (neurobiológus)
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7.

001-es BibID:BIBFORM004385
Első szerző:Antal Miklós (orvos, anatómus)
Cím:Numbers, densities, and colocalization of AMPA- and NMDA-type glutamate receptors at individual synapses in the superficial spinal dorsal horn of rats / Miklós Antal, Yugo Fukazawa, Mária Eördögh, Dóra Muszil, Elek Molnár, Makoto Itakura, Masami Takahashi, Ryuichi Shigemoto
Dátum:2008
Tárgyszavak:Orvostudományok Elméleti orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban
Megjelenés:The Journal of Neuroscience. - 28 : 39 (2008), p. 9692-9701. -
További szerzők:Fukazawa, Yugo Eördögh Mária Muszil Dóra Molnár Elek Itakura, Makoto Takahashi, Masami Shigemoto, Ryuichi
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8.

001-es BibID:BIBFORM067886
Első szerző:Bácskai Tímea (biológus, neurobiológus)
Cím:Effect of chronic fluorokinolone treatment on the structures innervating the salivary glands of the rat / Bácskai Tímea, Kelentey Barna, Deák Ádám, Zelles Tivadar, Skopkó Boglárka, Matesz Klára
Dátum:2007
ISSN:1065-6766
Megjegyzések:Fluorokinolones (i.e. Peflacine, PEF) are used in the dental and medical therapy. It was demonstrated that chronic treatment on the rats resulted in disturbance in the secretory function of the salivary glands accompanied by the morphological sign of atrophy in the secretory units. The mechanism of this impairment is unknown. Because the peripheral neuropathy was previously described as the toxic side effect of the chronic PEF treatment we proposed that the morphological and funcional disorder of salivary glands developed on the basis of a neuronal disorder. Earlier studies described, that the mast cells could release nerve growth factor (NGF), which is important in the surviving of neurons. The lack of NGF results degenerative processes in the peripheral neurons which can change the expression of neuropeptides (i.e. serotonin, SER).The aim of this study was to determine the number of mast cells and the qualitative and quantitative changes of SER immunoreactive (IR) nerve terminals in the salivary glands after PEF treatment. Adult rats were treated with PEF for 3 and 7 days. For the visualization of mast cells we have used Toluidine blue staining. Immunohisthochemical methods were used to detect the SER containing fibers on the salivary glands. After the chronic treatment we could detect the incresed number of mast cells which supports the protective role of the NGF. The number of SER IR fibers decreased compared to the control. The changes in the number of IR fibers support our previous results, that local denervation of Salivary gland can cause the atrophy of the acini.
Tárgyszavak:Orvostudományok Elméleti orvostudományok idézhető absztrakt
saliva
Megjelenés:Clinical Neuroscience. - 2007. (2007), p. 7. -
További szerzők:Kelentey Barna (1959-) (fogszakorvos) Deák Ádám (1974-) (állatorvos) Zelles Tivadar Skopkó Boglárka Emese (1986-) (fogszakorvos) Matesz Klára (1949-) (anatómus, neurobiológus)
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9.

001-es BibID:BIBFORM067884
Első szerző:Bácskai Tímea (biológus, neurobiológus)
Cím:Effect of fluorokinolone treatment on the peptidergic innervation of the salivary glands / Tímea Bácskai, Barna Kelentey, Ádám Deák, Tivadar Zelles, Boglárka Skopkó, Klara Matesz
Dátum:2010
Megjegyzések:Fluorokinolones (i.e. Peflacine, PEF) are used in the dental and medical therapy. It was demonstrated that chronic treatment on the rats resulted in disturbance in the secretory function of the salivary glands accompanied by the morphological sign of atrophy in the secretory units. The mechanism of this impairment is unknown. Because the peripheral neuropathy was previously described as the toxic side effect of the chronic PEF treatment we proposed that the morphological and functional disorder of salivary glands developed on the basis of a neuronal disorder. Earlier studies described, that the mast cells could release nerve growth factor (NGF), which is important in the surviving of neurons. The lack of NGF results degenerative processes in the peripheral neurons which can change the expression of neuropeptides (i.e. serotonine, SER). The aim of this study was to determine the number of mast cells and the qualitative and quantitative changes of SER immunoreactive (IR) nerve terminals in the salivary glands after PEF treatment. Adult rats were treated with PEF for 3 and 7 days. For the visualization of mast cell we have used Toluidine blue staining. Immunohistochemical methods were used to detect the SER containing fibers on the salivary glands. After the chronic treatment we could detect the increased number of mast cells which supports the protective role of the NGF. The number of SER IR fibers decreased compared to the control. The changes in the number of IR fibers support our previous results, that local denervation of salivary gland can cause the atrophy of the acini.
taa (hibás)
Tárgyszavak:Orvostudományok Elméleti orvostudományok idézhető absztrakt
saliva
Megjelenés:Frontiers in Neuroscience 2010 (2010), p. 1. -
További szerzők:Kelentey Barna (1959-) (fogszakorvos) Deák Ádám (1974-) (állatorvos) Zelles Tivadar Skopkó Boglárka Emese (1986-) (fogszakorvos) Matesz Klára (1949-) (anatómus, neurobiológus)
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10.

001-es BibID:BIBFORM029718
Első szerző:Baker, R. E.
Cím:Peripheral reinnervation patterns and dorsal root ganglion topography in skin-grafted frogs : a behavioral and histological examination / Baker R. E., Matesz K., Corner M. A., Székely G.
Dátum:1981
ISSN:0378-5866
Megjegyzések:Behavioral responses to mechanical stimulation of the skin were observed in unoperated, 180 degrees skin-rotated and sham-grafted Rana pipiens frogs before and after crushing various cutaneous nerve bundles. In the two control groups, wiping responses directed towards the animal's dorsum were mediated solely via dorsomedial (DM) and dorsolateral (DL) nerve trunks. In skin-rotated frogs, DM and DL nerve trunks were responsible for almost all of the misdirected responses elicited from dorsal cutaneous areas. Six frogs (2 sham- and 4 skin-rotated) possessed some areas of plical skin from which responses could only have been mediated via more ventrally located nerve trunks. However, such dorsal expansions of ventral receptive fields never included the midline skin areas from which misdirected responses had been elicited in the intact animal. The topographic arrangement of cells within the DRG appears to be weakly polarized in cobalt-stained sections, but with large individual variations in size and observed number of neuronal profiles. For the skin-rotated group the ratio of cobalt-filled profiles in the dorsal as compared with the ventral half of the ganglion was 1.6, which did not differ significantly from the control value of 1.9. Taken as a whole, the results of the present study indicate that selective (re)innervation of displaced skin by the original nerve fibers cannot explain the origin of misdirected responses in Rana pipiens.
Tárgyszavak:Orvostudományok Elméleti orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban
Megjelenés:Developmental Neuroscience. - 4 : 2 (1981), p. 134-141. -
További szerzők:Matesz Klára (1949-) (anatómus, neurobiológus) Corner, M. A. Székely György (1926-2017) (neurobiológus)
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11.

001-es BibID:BIBFORM054375
Első szerző:Bánki Eszter
Cím:Molecular Mechanisms Underlying the Nephroprotective Effects of PACAP in Diabetes / Eszter Banki, Krisztina Kovacs, Daniel Nagy, Tamas Juhasz, Peter Degrell, Katalin Csanaky, Peter Kiss, Gabor Jancso, Gabor Toth, Andrea Tamas, Dora Reglodi
Dátum:2014
ISSN:0895-8696
Tárgyszavak:Orvostudományok Elméleti orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban
Megjelenés:Journal of Molecular Neuroscience 54 : 3 (2014), p. 300-309. -
További szerzők:Kovács Krisztina (Pécs) Nagy Dániel Juhász Tamás (1976-) (biológus, orvosbiológus) Degrell Péter Csanaky Katalin Kiss Péter (Pécs) Jancsó Gábor Tóth Gábor Tamás Andrea (Idegtudomány) (Pécs) Reglődi Dóra (Idegtudományok)
Pályázati támogatás:K104984
OTKA
108596
OTKA
TÁMOP-4.2.2.A-11/1/KONV-2012-0024
TÁMOP
Bolyai Ösztöndíj
Egyéb
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12.

001-es BibID:BIBFORM029495
Első szerző:Birinyi András (anatómus, neurobiológus)
Cím:The extent of the dendritic tree and the number of synapses in the frog motoneuron / Birinyi A., Antal M., Wolf E., Székely G.
Dátum:1992
ISSN:0953-816X
Megjegyzések:Frog motoneurons were intracellularly labelled with cobaltic lysine in the brachial and the lumbar segments of the spinal cord, and the material was processed for light microscopy in serial sections. With the aid of the neuron reconstruction system NEUTRACE, the dendritic tree of neurons was reconstructed and the length and surface area of dendrites measured. The surface of somata was determined with the prolate - oblate average ellipsoid calculation. Corrections were made for shrinkage and for optical distortion. The mean surface area of somata was 6710 microm2; lumbar motoneurons were slightly larger than brachial motoneurons. The mean length of the combined dendritic tree of brachial neurons was 29 408 microm and that of lumbar neurons 46 806 microm. The mean surface area was 127 335 microm2 in brachial neurons, and 168 063 microm2 in lumbar neurons. The soma - dendrite surface area ratio was 3 - 5% in most cases. Dendrites with a diameter of </= 1.0 microm constituted approximately 75% of the combined dendritic length in most of the neurons. Unlike in the cat, there was no correlation between the size of stem dendrites and the extent of daughter branches. From the synaptic density estimated in earlier electron microscope investigations of frog motoneuron dendrites (Antal et al., J. Neurocytol., 15, 303 - 310, 1986; 21, 34 - 49, 1992), and from the present data, the number of synapses on the dendritic tree was calculated. The calculations indicated 26 949 synapses on the smallest and 61 519 synapses on the largest neuron if the synaptic density was multiplied by the length of the dendritic tree. If the synaptic density was multiplied by the surface area of the dendritic tree the calculation yielded 23 337 synapses for the smallest and 60 682 synapses for the largest neuron. More than 60% of the combined surface area of dendrites was >600 microm from the soma. This suggests that about two-thirds of the synapses impinged upon distant dendrites >600 microm from the soma. The efficacy of synapses at these large distances is investigated on model neurons in the accompanying paper
Tárgyszavak:Orvostudományok Természettudományok Biológiai tudományok Elméleti orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban
egyetemen (Magyarországon) készült közlemény
Megjelenés:European Journal Of Neuroscience. - 4 : 11 (1992), p. 1003-1012. -
További szerzők:Antal Miklós (1951-) (orvos, anatómus) Wolf Ervin (1961-) (fizikus, neurobiológus) Székely György (1926-2017) (neurobiológus)
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