Methamphetamine (MA), as massively abused psychoactive stimulant, has been associated with many neurological diseases. It has various potent and neurotoxic properties. There are many mechanisms of action that contribute to its neurotoxic and degenerative effects, including excessive neurotransmitter (NEU) release, blockage of NEU uptake transporters, degeneration of NEU receptors, process of oxidative stress etc. MA intoxication is caused by blood-brain barrier disruption resulted from MA-induced oxidation stress. In our laboratory we constantly work on animal research of MA. Our current interest is to investigate processes of MA-induced alteration in neurotransmission, especially during development of laboratory rat. This review will describe current understanding in role of NEUs, which are affected by MA-induced neurotoxicity caused by altering the action of NEUs in the central nervous system (CNS). It also briefly brings information about NEUs development in critical periods of development.

• MeSH
• centrální nervový systém účinky léků   růst a vývoj   metabolismus   MeSH
• chování zvířat účinky léků   MeSH
• krysa rodu rattus MeSH
• lidé MeSH
• methamfetamin toxicita   MeSH
• nervový přenos účinky léků   MeSH
• neurogeneze účinky léků   MeSH
• neurotoxické syndromy etiologie   metabolismus   patologie   MeSH
• neurotransmiterové látky toxicita   MeSH
• stimulanty centrálního nervového systému toxicita   MeSH
• zvířata MeSH
• Check Tag
• krysa rodu rattus MeSH
• lidé MeSH
• zvířata MeSH
• Publikační typ
• časopisecké články MeSH
• přehledy MeSH

Sphingolipids (SLs) are important signaling molecules and functional components of cellular membranes. Although SLs are known as crucial regulators of neural cell physiology and differentiation, modulations of SLs by environmental neurotoxicants in neural cells and their neuronal progeny have not yet been explored. In this study, we used in vitro models of differentiated neuron-like cells, which were repeatedly exposed during differentiation to model environmental toxicants, and we analyzed changes in sphingolipidome, cellular morphology and gene expression related to SL metabolism or neuronal differentiation. We compared these data with the results obtained in undifferentiated neural cells with progenitor-like features. As model polychlorinated organic pollutants, we used 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD), 3,3'-dichlorobiphenyl (PCB11) and 2,2',4,4',5,5'-hexachlorobiphenyl (PCB153). PCB153 revealed itself as the most prominent deregulator of SL metabolism and as potent toxicant during early phases of in vitro neurogenesis. TCDD exerted only minor changes in the levels of analysed lipid species, however, it significantly changed the rate of pro-neuronal differentiation and deregulated expression of neuronal markers during neurogenesis. PCB11 acted as a potent disruptor of in vitro neurogenesis, which induced significant alterations in SL metabolism and cellular morphology in both differentiated neuron-like models (differentiated NE4C and NG108-15 cells). We identified ceramide-1-phosphate, lactosylceramides and several glycosphingolipids to be the most sensitive SL species to exposure to polychlorinated pollutants. Additionally, we identified deregulation of several genes related to SL metabolism, which may be explored in future as potential markers of developmental neurotoxicity.

• MeSH
• buněčná diferenciace účinky léků   MeSH
• buněčné linie MeSH
• látky znečišťující životní prostředí toxicita   MeSH
• neurogeneze účinky léků   MeSH
• neurony účinky léků   metabolismus   MeSH
• neurotoxické syndromy etiologie   genetika   MeSH
• polychlorované bifenyly farmakologie   toxicita   MeSH
• polychlorované dibenzodioxiny toxicita   MeSH
• sfingolipidy metabolismus   MeSH
• zvířata MeSH
• Check Tag
• zvířata MeSH
• Publikační typ
• časopisecké články MeSH
• práce podpořená grantem MeSH
• srovnávací studie MeSH

The inhibition of glycogen synthase kinase-3 (GSK-3) can induce neurogenesis, and the associated activation of Wnt/β-catenin signaling via GSK-3 inhibition may represent a means to promote motor function recovery following spinal cord injury (SCI) via increased astrocyte migration, reduced astrocyte apoptosis, and enhanced axonal growth. Herein, we assessed the effects of GSK-3 inhibition in vitro on the neurogenesis of ependymal stem/progenitor cells (epSPCs) resident in the mouse spinal cord and of human embryonic stem cell-derived neural progenitors (hESC-NPs) and human-induced pluripotent stem cell-derived neural progenitors (hiPSC-NPs) and in vivo on spinal cord tissue regeneration and motor activity after SCI. We report that the treatment of epSPCs and human pluripotent stem cell-derived neural progenitors (hPSC-NPs) with the GSK-3 inhibitor Ro3303544 activates β-catenin signaling and increases the expression of the bIII-tubulin neuronal marker; furthermore, the differentiation of Ro3303544-treated cells prompted an increase in the number of terminally differentiated neurons. Administration of a water-soluble, bioavailable form of this GSK-3 inhibitor (Ro3303544-Cl) in a severe SCI mouse model revealed the increased expression of bIII-tubulin in the injury epicenter. Treatment with Ro3303544-Cl increased survival of mature neuron types from the propriospinal tract (vGlut1, Parv) and raphe tract (5-HT), protein kinase C gamma-positive neurons, and GABAergic interneurons (GAD65/67) above the injury epicenter. Moreover, we observed higher numbers of newly born BrdU/DCX-positive neurons in Ro3303544-Cl-treated animal tissues, a reduced area delimited by astrocyte scar borders, and improved motor function. Based on this study, we believe that treating animals with epSPCs or hPSC-NPs in combination with Ro3303544-Cl deserves further investigation towards the development of a possible therapeutic strategy for SCI.

• MeSH
• kinasa 3 glykogensynthasy antagonisté a inhibitory   MeSH
• lidé MeSH
• modely nemocí na zvířatech MeSH
• multipotentní kmenové buňky účinky léků   MeSH
• myši inbrední C57BL MeSH
• myši MeSH
• neurogeneze účinky léků   MeSH
• poranění míchy farmakoterapie   enzymologie   MeSH
• transplantace kmenových buněk MeSH
• western blotting MeSH
• zvířata MeSH
• Check Tag
• lidé MeSH
• myši MeSH
• ženské pohlaví MeSH
• zvířata MeSH
• Publikační typ
• časopisecké články MeSH
• práce podpořená grantem MeSH

Obesity and type 2 diabetes mellitus (T2DM) are important risk factors for Alzheimer's disease (AD). Drugs originally developed for T2DM treatment, e.g., analog of glucagon-like peptide 1 liraglutide, have shown neuroprotective effects in mouse models of AD. We previously examined the neuroprotective properties of palm11-PrRP31, an anorexigenic and glucose-lowering analog of prolactin-releasing peptide, in a mouse model of AD-like Tau pathology, THY-Tau22 mice. Here, we demonstrate the neuroprotective effects of palm11-PrRP31 in double transgenic APP/PS1 mice, a model of AD-like β-amyloid (Aβ) pathology. The 7-8-month-old APP/PS1 male mice were subcutaneously injected with liraglutide or palm11-PrRP31 for 2 months. Both the liraglutide and palm11-PrRP31 treatments reduced the Aβ plaque load in the hippocampus. Palm11-PrRP31 also significantly reduced hippocampal microgliosis, consistent with our observations of a reduced Aβ plaque load, and reduced cortical astrocytosis, similar to the treatment with liraglutide. Palm11-PrRP31 also tended to increase neurogenesis, as indicated by the number of doublecortin-positive cells in the hippocampus. After the treatment with both anorexigenic compounds, we observed a significant decrease in Tau phosphorylation at Thr231, one of the first epitopes phosphorylated in AD. This effect was probably caused by elevated activity of protein phosphatase 2A subunit C, the main Tau phosphatase. Both liraglutide and palm11-PrRP31 reduced the levels of caspase 3, which has multiple roles in the pathogenesis of AD. Palm11-PrRP31 increased protein levels of the pre-synaptic marker synaptophysin, suggesting that palm11-PrRP31 might help preserve synapses. These results indicate that palm11-PrRP31 has promising potential for the treatment of neurodegenerative diseases.

• MeSH
• Alzheimerova nemoc farmakoterapie   metabolismus   patologie   MeSH
• amyloidní beta-protein metabolismus   MeSH
• amyloidní plaky farmakoterapie   metabolismus   patologie   MeSH
• amyloidóza farmakoterapie   metabolismus   patologie   MeSH
• glióza farmakoterapie   metabolismus   patologie   MeSH
• hipokampus účinky léků   metabolismus   patologie   MeSH
• hormon uvolňující prolaktin analogy a deriváty   MeSH
• lidé MeSH
• liraglutid farmakologie   MeSH
• modely nemocí na zvířatech MeSH
• myši inbrední C57BL MeSH
• myši transgenní MeSH
• náhodné rozdělení MeSH
• neurogeneze účinky léků   MeSH
• neuroprotektivní látky farmakologie   MeSH
• proteiny tau metabolismus   MeSH
• zánět farmakoterapie   metabolismus   patologie   MeSH
• zvířata MeSH
• Check Tag
• lidé MeSH
• mužské pohlaví MeSH
• zvířata MeSH
• Publikační typ
• časopisecké články MeSH
• práce podpořená grantem MeSH

The cytocompatibility of cardiomyocytes derived from embryonic stem cells and neural progenitors, which were seeded on the surface of composite films made of graphene oxide (GO) and polypyrrole (PPy-GO) or poly(3,4-ethylenedioxythiophene) (PEDOT-GO) are reported. The GO incorporated in the composite matrix contributes to the patterning of the composite surface, while the electrically conducting PPy and PEDOT serve as ion-to-electron transducers facilitating electrical stimulation/sensing. The films were fabricated by a simple one-step electropolymerization procedure on electrically conducting indium tin oxide (ITO) and graphene paper (GP) substrates. Factors affecting the cell behaviour, i.e. the surface topography, wettability, and electrical surface conductivity, were studied. The PPy-GO and PEDOT-GO prepared on ITO exhibited high surface conductivity, especially in the case of the ITO/PPy-GO composite. We found that for cardiomyocytes, the PPy-GO and PEDOT-GO composites counteracted the negative effect of the GP substrate that inhibited their growth. Both the PPy-GO and PEDOT-GO composites prepared on ITO and GP significantly decreased the cytocompatibility of neural progenitors. The presented results enhance the knowledge about the biological properties of electroactive materials, which are critical for tissue engineering, especially in context stimuli-responsive scaffolds.

• MeSH
• bicyklické sloučeniny heterocyklické chemie   MeSH
• elektrická vodivost * MeSH
• elektrochemie * MeSH
• grafit farmakologie   MeSH
• kardiomyocyty cytologie   účinky léků   MeSH
• myši MeSH
• nervové kmenové buňky cytologie   účinky léků   MeSH
• neurogeneze účinky léků   MeSH
• polymery chemie   farmakologie   MeSH
• pyrroly chemie   MeSH
• voda chemie   MeSH
• zvířata MeSH
• Check Tag
• myši MeSH
• zvířata MeSH
• Publikační typ
• časopisecké články MeSH

Clinical studies consistently report structural impairments (i.e.: ventricular enlargement, decreased volume of anterior cingulate cortex or hippocampus) and functional abnormalities including changes in regional cerebral blood flow in individuals suffering from schizophrenia, which can be evaluated by magnetic resonance imaging (MRI) techniques. The aim of this study was to assess cerebral blood perfusion in several schizophrenia-related brain regions using Arterial Spin Labelling MRI (ASL MRI, 9.4 T Bruker BioSpec 94/30USR scanner) in rats. In this study, prenatal exposure to methylazoxymethanol acetate (MAM, 22 mg/kg) at gestational day (GD) 17 and the perinatal treatment with Δ-9-tetrahydrocannabinol (THC, 5 mg/kg) from GD15 to postnatal day 9 elicited behavioral deficits consistent with schizophrenia-like phenotype, which is in agreement with the neurodevelopmental hypothesis of schizophrenia. In MAM exposed rats a significant enlargement of lateral ventricles and perfusion changes (i.e.: increased blood perfusion in the circle of Willis and sensorimotor cortex and decreased perfusion in hippocampus) were detected. On the other hand, the THC perinatally exposed rats did not show differences in the cerebral blood perfusion in any region of interest. These results suggest that although both pre/perinatal insults showed some of the schizophrenia-like deficits, these are not strictly related to distinct hemodynamic features.

• MeSH
• circulus arteriosus Willisi diagnostické zobrazování   účinky léků   embryologie   MeSH
• hipokampus krevní zásobení   diagnostické zobrazování   účinky léků   embryologie   MeSH
• krysa rodu rattus MeSH
• lidé MeSH
• magnetická rezonanční angiografie metody   MeSH
• methylazoxymethanolacetát toxicita   MeSH
• modely nemocí na zvířatech MeSH
• mozkový krevní oběh účinky léků   MeSH
• neurogeneze účinky léků   MeSH
• schizofrenie chemicky indukované   diagnóza   MeSH
• senzorimotorický kortex krevní zásobení   diagnostické zobrazování   účinky léků   embryologie   MeSH
• techniky pozorování chování MeSH
• těhotenství MeSH
• tetrahydrokanabinol toxicita   MeSH
• zpožděný efekt prenatální expozice chemicky indukované   diagnostické zobrazování   MeSH
• zvířata MeSH
• Check Tag
• krysa rodu rattus MeSH
• lidé MeSH
• mužské pohlaví MeSH
• těhotenství MeSH
• ženské pohlaví MeSH
• zvířata MeSH
• Publikační typ
• časopisecké články MeSH
• práce podpořená grantem MeSH

Although histone acetylation is one of the most widely studied epigenetic modifications, there is still a lack of information regarding how the acetylome is regulated during brain development and pathophysiological processes. We demonstrate that the embryonic brain (E15) is characterized by an increase in H3K9 acetylation as well as decreases in the levels of HDAC1 and HDAC3. Moreover, experimental induction of H3K9 hyperacetylation led to the overexpression of NCAM in the embryonic cortex and depletion of Sox2 in the subventricular ependyma, which mimicked the differentiation processes. Inducing differentiation in HDAC1-deficient mouse ESCs resulted in early H3K9 deacetylation, Sox2 downregulation, and enhanced astrogliogenesis, whereas neuro-differentiation was almost suppressed. Neuro-differentiation of (wt) ESCs was characterized by H3K9 hyperacetylation that was associated with HDAC1 and HDAC3 depletion. Conversely, the hippocampi of schizophrenia-like animals showed H3K9 deacetylation that was regulated by an increase in both HDAC1 and HDAC3. The hippocampi of schizophrenia-like brains that were treated with the cannabinoid receptor-1 inverse antagonist AM251 expressed H3K9ac at the level observed in normal brains. Together, the results indicate that co-regulation of H3K9ac by HDAC1 and HDAC3 is important to both embryonic brain development and neuro-differentiation as well as the pathophysiology of a schizophrenia-like phenotype.

• MeSH
• acetylace MeSH
• antagonisté kanabinoidních receptorů farmakologie   MeSH
• antipsychotika farmakologie   MeSH
• časové faktory MeSH
• epigeneze genetická MeSH
• gestační stáří MeSH
• histondeacetylasa 1 antagonisté a inhibitory   genetika   metabolismus   MeSH
• histondeacetylasy genetika   metabolismus   MeSH
• histony metabolismus   MeSH
• inhibitory histondeacetylas farmakologie   MeSH
• methylazoxymethanolacetát MeSH
• modely nemocí na zvířatech MeSH
• molekuly buněčné adheze nervové genetika   metabolismus   MeSH
• mozek účinky léků   embryologie   enzymologie   patologie   MeSH
• myši inbrední C57BL MeSH
• neurogeneze * účinky léků   MeSH
• neurony účinky léků   enzymologie   patologie   MeSH
• posttranslační úpravy proteinů MeSH
• potkani Sprague-Dawley MeSH
• receptor kanabinoidní CB1 antagonisté a inhibitory   metabolismus   MeSH
• schizofrenie chemicky indukované   farmakoterapie   enzymologie   genetika   MeSH
• signální transdukce MeSH
• transkripční faktory SOXB1 genetika   metabolismus   MeSH
• vývojová regulace genové exprese MeSH
• zvířata MeSH
• Check Tag
• zvířata MeSH
• Publikační typ
• časopisecké články MeSH

Neural rosette formation is a critical morphogenetic process during neural development, whereby neural stem cells are enclosed in rosette niches to equipoise proliferation and differentiation. How neural rosettes form and provide a regulatory micro-environment remains to be elucidated. We employed the human embryonic stem cell-based neural rosette system to investigate the structural development and function of neural rosettes. Our study shows that neural rosette formation consists of five types of morphological change: intercalation, constriction, polarization, elongation and lumen formation. Ca2+ signaling plays a pivotal role in the five steps by regulating the actions of the cytoskeletal complexes, actin, myosin II and tubulin during intercalation, constriction and elongation. These, in turn, control the polarizing elements, ZO-1, PARD3 and β-catenin during polarization and lumen production for neural rosette formation. We further demonstrate that the dismantlement of neural rosettes, mediated by the destruction of cytoskeletal elements, promotes neurogenesis and astrogenesis prematurely, indicating that an intact rosette structure is essential for orderly neural development.

• MeSH
• aktiny metabolismus   MeSH
• apoptóza účinky léků   MeSH
• buněčný rodokmen účinky léků   MeSH
• cytoskelet účinky léků   metabolismus   MeSH
• lidé MeSH
• lidské embryonální kmenové buňky cytologie   účinky léků   metabolismus   MeSH
• myosin typu II metabolismus   MeSH
• nervové kmenové buňky cytologie   účinky léků   metabolismus   MeSH
• neurogeneze účinky léků   MeSH
• neurony cytologie   účinky léků   metabolismus   ultrastruktura   MeSH
• polarita buněk účinky léků   MeSH
• protein zonula occludens 1 metabolismus   MeSH
• tvar buňky * účinky léků   MeSH
• tvorba rozet * MeSH
• vápník farmakologie   MeSH
• vápníková signalizace * účinky léků   MeSH
• Check Tag
• lidé MeSH
• Publikační typ
• časopisecké články MeSH
• práce podpořená grantem MeSH

NG2 cells represent one of the most proliferative glial cell populations in the intact mammalian central nervous system (CNS). They are well-known for their ability to renew themselves or to generate new oligodendrocytes during development as well as in adulthood, therefore also being termed oligodendrocyte progenitor cells. Following CNS injuries, such as demyelination, trauma or ischemia, the proliferative capacity of NG2 cells rapidly increases and moreover, their differentiation potential broadens, as documented by numerous reports also describing their differentiation into astrocytes or even neurons. Here, we summarize the current knowledge about NG2 cells proliferation, their fate plasticity during embryogenesis as well as in postnatal CNS under physiological and pathological conditions, with the main emphasis on the role of various signaling molecules, growth factors, hormones or even neurotransmitters on the fate potential of NG2 cells.

• MeSH
• antigeny metabolismus   MeSH
• kmenové buňky účinky léků   fyziologie   MeSH
• látky ovlivňující centrální nervový systém farmakologie   terapeutické užití   MeSH
• lidé MeSH
• mezibuněčné signální peptidy a proteiny metabolismus   MeSH
• multipotentní kmenové buňky účinky léků   fyziologie   transplantace   MeSH
• neurogeneze účinky léků   fyziologie   MeSH
• neuroglie účinky léků   fyziologie   MeSH
• neuroplasticita účinky léků   fyziologie   MeSH
• oligodendroglie účinky léků   fyziologie   MeSH
• proliferace buněk účinky léků   fyziologie   MeSH
• proteoglykany metabolismus   MeSH
• zvířata MeSH
• Check Tag
• lidé MeSH
• zvířata MeSH
• Publikační typ
• časopisecké články MeSH
• práce podpořená grantem MeSH
• přehledy MeSH

Adult neurogenesis in the dentate gyrus adds a substantial number of new functional neurons to the hippocampus network in rodents. To date, however, the function of these new granule cells remains unclear. We conducted an experiment to assess the contribution of adult neurogenesis in the dentate gyrus to acquisition and reversal learning in a task that predominantly requires generalization of a rule. Young adult male Long-Evans rats were repeatedly administered either a cytostatic temozolomide or saline for a period of four weeks (3 injections per week). Post treatment, animals were injected with bromodeoxyuridine to quantify adult neurogenesis in the dentate gyrus. For behavioral assessment we used hippocampus-dependent active place avoidance with reversal in a Carousel maze. Animals first learned to avoid a 60° sector on the rotating arena. Afterwards, sector was relocated to the opposite side of the rotating arena (reversal). The administration of temozolomide significantly improved the reversal performance compared to saline-treated rats. Our results suggest a significant, level-dependent, improvement of reversal learning in animals with reduced adult neurogenesis in hippocampus.

• MeSH
• antitumorózní látky alkylující farmakologie   MeSH
• dakarbazin analogy a deriváty   farmakologie   MeSH
• gyrus dentatus účinky léků   MeSH
• krysa rodu rattus MeSH
• neurogeneze účinky léků   MeSH
• neurony účinky léků   MeSH
• potkani Long-Evans MeSH
• prostorové učení účinky léků   MeSH
• reverzní učení účinky léků   MeSH
• učení vyhýbat se účinky léků   MeSH
• zvířata MeSH
• Check Tag
• krysa rodu rattus MeSH
• mužské pohlaví MeSH
• zvířata MeSH
• Publikační typ
• časopisecké články MeSH