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  1. Article: Brain Structural Plasticity: From Adult Neurogenesis to Immature Neurons.

    La Rosa, Chiara / Parolisi, Roberta / Bonfanti, Luca

    Frontiers in neuroscience

    2020  Volume 14, Page(s) 75

    Abstract: Brain structural plasticity is an extraordinary tool that allows the mature brain to adapt to environmental changes, to learn, to repair itself after lesions or disease, and to slow aging. A long history of neuroscience research led to fascinating ... ...

    Abstract Brain structural plasticity is an extraordinary tool that allows the mature brain to adapt to environmental changes, to learn, to repair itself after lesions or disease, and to slow aging. A long history of neuroscience research led to fascinating discoveries of different types of plasticity, involving changes in the genetically determined structure of nervous tissue, up to the ultimate dream of neuronal replacement: a stem cell-driven "adult neurogenesis" (AN). Yet, this road does not seem a straight one, since mutable dogmas, conflicting results and conflicting interpretations continue to warm the field. As a result, after more than 10,000 papers published on AN, we still do not know its time course, rate or features with respect to other kinds of structural plasticity in our brain. The solution does not appear to be behind the next curve, as differences among mammals reveal a very complex landscape that cannot be easily understood from rodents models alone. By considering evolutionary aspects, some pitfalls in the interpretation of cell markers, and a novel population of undifferentiated cells that are not newly generated [immature neurons (INs)], we address some conflicting results and controversies in order to find the right road forward. We suggest that considering plasticity in a comparative framework might help assemble the evolutionary, anatomical and functional pieces of a very complex biological process with extraordinary translational potential.
    Language English
    Publishing date 2020-02-04
    Publishing country Switzerland
    Document type Journal Article ; Review
    ZDB-ID 2411902-7
    ISSN 1662-453X ; 1662-4548
    ISSN (online) 1662-453X
    ISSN 1662-4548
    DOI 10.3389/fnins.2020.00075
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article: Lestaurtinib inhibits Citron kinase activity and medulloblastoma growth through induction of DNA damage, apoptosis and cytokinesis failure.

    Pallavicini, Gianmarco / Iegiani, Giorgia / Parolisi, Roberta / Ferraro, Alessia / Garello, Francesca / Bitonto, Valeria / Terreno, Enzo / Gai, Marta / Di Cunto, Ferdinando

    Frontiers in oncology

    2023  Volume 13, Page(s) 1202585

    Abstract: Introduction: Medulloblastoma (MB), the most common malignant pediatric brain tumor, is currently treated with surgery followed by radiation and chemotherapy, which is accompanied by severe side effects, raising the need for innovative therapies. ... ...

    Abstract Introduction: Medulloblastoma (MB), the most common malignant pediatric brain tumor, is currently treated with surgery followed by radiation and chemotherapy, which is accompanied by severe side effects, raising the need for innovative therapies. Disruption of the microcephaly-related gene Citron kinase (CITK) impairs the expansion of xenograft models as well as spontaneous MB arising in transgenic mice. No specific CITK inhibitors are available.
    Methods: Lestaurtinib, a Staurosporine derivative also known as CEP-701, inhibits CITK with IC50 of 90 nM. We therefore tested the biological effects of this molecule on different MB cell lines, as well as in vivo, injecting the drug in MBs arising in SmoA1 transgenic mice.
    Results: Similar to CITK knockdown, treatment of MB cells with 100 nM Lestaurtinib reduces phospho-INCENP levels at the midbody and leads to late cytokinesis failure. Moreover, Lestaurtinib impairs cell proliferation through CITK-sensitive mechanisms. These phenotypes are accompanied by accumulation of DNA double strand breaks, cell cycle block and TP53 superfamily activation in vitro and in vivo. Lestaurtinib treatment reduces tumor growth and increases mice survival.
    Discussion: Our data indicate that Lestaurtinib produces in MB cells poly-pharmacological effects extending beyond the inhibition of its validated targets, supporting the possibility of repositioning this drug for MB treatment.
    Language English
    Publishing date 2023-06-19
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2649216-7
    ISSN 2234-943X
    ISSN 2234-943X
    DOI 10.3389/fonc.2023.1202585
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article: Humans and Dolphins: Decline and Fall of Adult Neurogenesis.

    Parolisi, Roberta / Cozzi, Bruno / Bonfanti, Luca

    Frontiers in neuroscience

    2018  Volume 12, Page(s) 497

    Abstract: Pre-clinical research is carried out on animal models, mostly laboratory rodents, with the ultimate aim of translating the acquired knowledge to humans. In the last decades, adult neurogenesis (AN) has been intensively studied since it is viewed as a ... ...

    Abstract Pre-clinical research is carried out on animal models, mostly laboratory rodents, with the ultimate aim of translating the acquired knowledge to humans. In the last decades, adult neurogenesis (AN) has been intensively studied since it is viewed as a tool for fostering brain plasticity, possibly repair. Yet, occurrence, location, and rate of AN vary among mammals: the capability for constitutive neuronal production is substantially reduced when comparing small-brained, short living (laboratory rodents) and large-brained, long-living species (humans, dolphins). Several difficulties concerning scarce availability of fresh tissues, technical limits and ethical concerns did contribute in delaying and diverting the achievement of the picture of neurogenic plasticity in large-brained mammals. Some reports appeared in the last few years, starting to shed more light on this issue. Despite technical limits, data from recent studies mostly converge to indicate that neurogenesis is vestigial, or possibly absent, in regions of the adult human brain where in rodents neuronal addition continues into adult life. Analyses carried out in dolphins, mammals devoid of olfaction, but descendant of ancestors provided with olfaction, has shown disappearance of neurogenesis in both neonatal and adult individuals. Heterogeneity in mammalian structural plasticity remains largely underestimated by scientists focusing their research in rodents. Comparative studies are the key to understand the function of AN and the possible translational significance of neuronal replacement in humans. Here, we summarize comparative studies on AN and discuss the evolutionary implications of variations on the recruitment of new neurons in different regions and different species.
    Language English
    Publishing date 2018-07-20
    Publishing country Switzerland
    Document type Journal Article ; Review
    ZDB-ID 2411902-7
    ISSN 1662-453X ; 1662-4548
    ISSN (online) 1662-453X
    ISSN 1662-4548
    DOI 10.3389/fnins.2018.00497
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: hESC-derived striatal progenitors grafted into a Huntington's disease rat model support long-term functional motor recovery by differentiating, self-organizing and connecting into the lesioned striatum.

    Schellino, Roberta / Besusso, Dario / Parolisi, Roberta / Gómez-González, Gabriela B / Dallere, Sveva / Scaramuzza, Linda / Ribodino, Marta / Campus, Ilaria / Conforti, Paola / Parmar, Malin / Boido, Marina / Cattaneo, Elena / Buffo, Annalisa

    Stem cell research & therapy

    2023  Volume 14, Issue 1, Page(s) 189

    Abstract: Background: Huntington's disease (HD) is a motor and cognitive neurodegenerative disorder due to prominent loss of striatal medium spiny neurons (MSNs). Cell replacement using human embryonic stem cells (hESCs) derivatives may offer new therapeutic ... ...

    Abstract Background: Huntington's disease (HD) is a motor and cognitive neurodegenerative disorder due to prominent loss of striatal medium spiny neurons (MSNs). Cell replacement using human embryonic stem cells (hESCs) derivatives may offer new therapeutic opportunities to replace degenerated neurons and repair damaged circuits.
    Methods: With the aim to develop effective cell replacement for HD, we assessed the long-term therapeutic value of hESC-derived striatal progenitors by grafting the cells into the striatum of a preclinical model of HD [i.e., adult immunodeficient rats in which the striatum was lesioned by monolateral injection of quinolinic acid (QA)]. We examined the survival, maturation, self-organization and integration of the graft as well as its impact on lesion-dependent motor alterations up to 6 months post-graft. Moreover, we tested whether exposing a cohort of QA-lesioned animals to environmental enrichment (EE) could improve graft integration and function.
    Results: Human striatal progenitors survived up to 6 months after transplantation and showed morphological and neurochemical features typical of human MSNs. Donor-derived interneurons were also detected. Grafts wired in both local and long-range striatal circuits, formed domains suggestive of distinct ganglionic eminence territories and displayed emerging striosome features. Moreover, over time grafts improved complex motor performances affected by QA. EE selectively increased cell differentiation into MSN phenotype and promoted host-to-graft connectivity. However, when combined to the graft, the EE paradigm used in this study was insufficient to produce an additive effect on task execution.
    Conclusions: The data support the long-term therapeutic potential of ESC-derived human striatal progenitor grafts for the replacement of degenerated striatal neurons in HD and suggest that EE can effectively accelerate the maturation and promote the integration of human striatal cells.
    MeSH term(s) Rats ; Animals ; Humans ; Human Embryonic Stem Cells ; Huntington Disease/therapy ; Brain Tissue Transplantation ; Corpus Striatum/physiology ; Neurons ; Disease Models, Animal
    Language English
    Publishing date 2023-07-28
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2548671-8
    ISSN 1757-6512 ; 1757-6512
    ISSN (online) 1757-6512
    ISSN 1757-6512
    DOI 10.1186/s13287-023-03422-4
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Non-neurogenic SVZ-like niche in dolphins, mammals devoid of olfaction.

    Parolisi, Roberta / Cozzi, Bruno / Bonfanti, Luca

    Brain structure & function

    2017  Volume 222, Issue 6, Page(s) 2625–2639

    Abstract: Adult neurogenesis has been implicated in brain plasticity and brain repair. In mammals, it is mostly restricted to specific brain regions and specific physiological functions. The function and evolutionary history of mammalian adult neurogenesis has ... ...

    Abstract Adult neurogenesis has been implicated in brain plasticity and brain repair. In mammals, it is mostly restricted to specific brain regions and specific physiological functions. The function and evolutionary history of mammalian adult neurogenesis has been elusive so far. The largest neurogenic site in mammals (subventricular zone, SVZ) generates neurons destined to populate the olfactory bulb. The SVZ neurogenic activity appears to be related to the dependence of the species on olfaction since it occurs at high rates throughout life in animals strongly dependent on this function for their survival. Indeed, it dramatically decreases in humans, who do not depend so much on it. This study investigates whether the SVZ neurogenic site exists in mammals devoid of olfaction and olfactory brain structures, such as dolphins. Our results demonstate that a small SVZ-like region persists in these aquatic mammals. However, this region seems to have lost its neurogenic capabilities since neonatal stages. In addition, instead of the typical newly generated neuroblasts, some mature neurons were observed in the dolphin SVZ. Since cetaceans evolved from terrestrial ancestors, non-neurogenic SVZ may indicate extinction of adult neurogenesis in the absence of olfactory function, with the retention of an SVZ-like anatomical region either vestigial or of still unknown role.
    Language English
    Publishing date 2017-08
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 2273162-3
    ISSN 1863-2661 ; 1863-2653
    ISSN (online) 1863-2661
    ISSN 1863-2653
    DOI 10.1007/s00429-016-1361-3
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: c-Jun N-terminal kinase 1 (JNK1) modulates oligodendrocyte progenitor cell architecture, proliferation and myelination.

    Lorenzati, Martina / Boda, Enrica / Parolisi, Roberta / Bonato, Martino / Borsello, Tiziana / Herdegen, Thomas / Buffo, Annalisa / Vercelli, Alessandro

    Scientific reports

    2021  Volume 11, Issue 1, Page(s) 7264

    Abstract: During Central Nervous System ontogenesis, myelinating oligodendrocytes (OLs) arise from highly ramified and proliferative precursors called oligodendrocyte progenitor cells (OPCs). OPC architecture, proliferation and oligodendro-/myelino-genesis are ... ...

    Abstract During Central Nervous System ontogenesis, myelinating oligodendrocytes (OLs) arise from highly ramified and proliferative precursors called oligodendrocyte progenitor cells (OPCs). OPC architecture, proliferation and oligodendro-/myelino-genesis are finely regulated by the interplay of cell-intrinsic and extrinsic factors. A variety of extrinsic cues converge on the extracellular signal-regulated kinase/mitogen activated protein kinase (ERK/MAPK) pathway. Here we found that the germinal ablation of the MAPK c-Jun N-Terminal Kinase isoform 1 (JNK1) results in a significant reduction of myelin in the cerebral cortex and corpus callosum at both postnatal and adult stages. Myelin alterations are accompanied by higher OPC density and proliferation during the first weeks of life, consistent with a transient alteration of mechanisms regulating OPC self-renewal and differentiation. JNK1 KO OPCs also show smaller occupancy territories and a less complex branching architecture in vivo. Notably, these latter phenotypes are recapitulated in pure cultures of JNK1 KO OPCs and of WT OPCs treated with the JNK inhibitor D-JNKI-1. Moreover, JNK1 KO and WT D-JNKI-1 treated OLs, while not showing overt alterations of differentiation in vitro, display a reduced surface compared to controls. Our results unveil a novel player in the complex regulation of OPC biology, on the one hand showing that JNK1 ablation cell-autonomously determines alterations of OPC proliferation and branching architecture and, on the other hand, suggesting that JNK1 signaling in OLs participates in myelination in vivo.
    MeSH term(s) Animals ; Cell Proliferation ; MAP Kinase Signaling System ; Mice ; Mice, Knockout ; Mitogen-Activated Protein Kinase 8/genetics ; Mitogen-Activated Protein Kinase 8/metabolism ; Myelin Sheath/genetics ; Myelin Sheath/metabolism ; Oligodendrocyte Precursor Cells/enzymology ; Oligodendroglia/enzymology
    Chemical Substances Mitogen-Activated Protein Kinase 8 (EC 2.7.11.24)
    Language English
    Publishing date 2021-03-31
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2615211-3
    ISSN 2045-2322 ; 2045-2322
    ISSN (online) 2045-2322
    ISSN 2045-2322
    DOI 10.1038/s41598-021-86673-6
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Exposure to fine particulate matter (PM

    Parolisi, Roberta / Montarolo, Francesca / Pini, Alessandro / Rovelli, Sabrina / Cattaneo, Andrea / Bertolotto, Antonio / Buffo, Annalisa / Bollati, Valentina / Boda, Enrica

    Neurochemistry international

    2021  Volume 145, Page(s) 104991

    Abstract: Epidemiological studies show a strong association between exposure to air pollution - and particularly to particulate matter (PM) -, increased prevalence of Multiple Sclerosis (MS) and higher rates of hospital admissions for MS and MS relapses. Besides ... ...

    Abstract Epidemiological studies show a strong association between exposure to air pollution - and particularly to particulate matter (PM) -, increased prevalence of Multiple Sclerosis (MS) and higher rates of hospital admissions for MS and MS relapses. Besides having immunomodulatory effects and sustaining a systemic oxidative-inflammatory response, PM may participate in MS pathogenesis by targeting also Central Nervous System (CNS)-specific processes, such as myelin repair. Here we show that, in a mouse model of lysolecithin-induced demyelination of the subcortical white matter, post-injury exposure to fine PM hampers remyelination, disturbs oligodendroglia differentiation dynamics and promotes astroglia and microglia reactivity. These findings support the view that exposure to fine PM can contribute to demyelinating pathologies by targeting the endogenous regenerative capability of the CNS tissue.
    MeSH term(s) Animals ; Cell Differentiation/physiology ; Demyelinating Diseases/chemically induced ; Demyelinating Diseases/pathology ; Disease Models, Animal ; Male ; Mice ; Mice, Inbred C57BL ; Myelin Sheath/pathology ; Particulate Matter/administration & dosage ; Particulate Matter/toxicity ; Trachea/pathology ; White Matter/pathology
    Chemical Substances Particulate Matter
    Language English
    Publishing date 2021-02-12
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 283190-9
    ISSN 1872-9754 ; 0197-0186
    ISSN (online) 1872-9754
    ISSN 0197-0186
    DOI 10.1016/j.neuint.2021.104991
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Analysis of the Gadolinium retention in the Experimental Autoimmune Encephalomyelitis (EAE) murine model of Multiple Sclerosis.

    Furlan, Chiara / Montarolo, Francesca / Di Gregorio, Enza / Parolisi, Roberta / Atlante, Sandra / Buffo, Annalisa / Bertolotto, Antonio / Aime, Silvio / Gianolio, Eliana

    Journal of trace elements in medicine and biology : organ of the Society for Minerals and Trace Elements (GMS)

    2021  Volume 68, Page(s) 126831

    Abstract: Objectives: The aim of this study is to quantitatively investigate, at the preclinical level, the extent of Gd retention in the CNS, and peripheral organs, of immune-mediated murine models (Experimental Autoimmune Encephalomyelitis -EAE) of Multiple ... ...

    Abstract Objectives: The aim of this study is to quantitatively investigate, at the preclinical level, the extent of Gd retention in the CNS, and peripheral organs, of immune-mediated murine models (Experimental Autoimmune Encephalomyelitis -EAE) of Multiple Sclerosis, compared to control animals, upon the injection of gadodiamide. The influence of the Gadolinium Based Contrast Agent administration timing during the course of EAE development is also monitored.
    Methods: EAE mice were injected with three doses (1.2 mmol/kg each) of gadodiamide at three different time points during the EAE development and sacrificed after 21 or 39 days. Organs were collected and the amount of Gd was quantified through Inductively Coupled Plasma-Mass Spectrometry. Transmission electron microscopy (TEM) and MRI techniques were applied to add spatial and qualitative information to the obtained results.
    Results: In the spinal cord of EAE group, 21 days after gadodiamide administration, a significantly higher accumulation of Gd occurred. Conversely, in the encephalon, a lower amount of Gd retention was reached, even if differences emerged between EAE and controls mice. After 39 days, the amounts of retained Gd markedly decreased. TEM validated the presence of Gd in CNS. MRI of the encephalon at 7.1T did not highlight any hyper intense region.
    Conclusion: In the spinal cord of EAE mice, which is the mostly damaged region in this specific animal model, a preferential but transient accumulation of Gd is observed. In the encephalon, the Gd retention could be mostly related to inflammation occurring upon immunization rather than to demyelination.
    MeSH term(s) Animals ; Disease Models, Animal ; Encephalomyelitis, Autoimmune, Experimental ; Gadolinium ; Mice ; Mice, Inbred C57BL ; Multiple Sclerosis/diagnostic imaging ; Organometallic Compounds
    Chemical Substances Organometallic Compounds ; Gadolinium (AU0V1LM3JT)
    Language English
    Publishing date 2021-08-02
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 1236267-0
    ISSN 1878-3252 ; 1611-602X ; 0946-672X
    ISSN (online) 1878-3252 ; 1611-602X
    ISSN 0946-672X
    DOI 10.1016/j.jtemb.2021.126831
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article: Osteogenic and Neurogenic Stem Cells in Their Own Place: Unraveling Differences and Similarities Between Niches.

    Lattanzi, Wanda / Parolisi, Roberta / Barba, Marta / Bonfanti, Luca

    Frontiers in cellular neuroscience

    2015  Volume 9, Page(s) 455

    Abstract: Although therapeutic use of stem cells (SCs) is already available in some tissues (cornea, blood, and skin), in most organs we are far from reaching the translational goal of regenerative medicine. In the nervous system, due to intrinsic features which ... ...

    Abstract Although therapeutic use of stem cells (SCs) is already available in some tissues (cornea, blood, and skin), in most organs we are far from reaching the translational goal of regenerative medicine. In the nervous system, due to intrinsic features which make it refractory to regeneration/repair, it is very hard to obtain functionally integrated regenerative outcomes, even starting from its own SCs (the neural stem cells; NSCs). Besides NSCs, mesenchymal stem cells (MSCs) have also been proposed for therapeutic purposes in neurological diseases. Yet, direct (regenerative) and indirect (bystander) effects are often confused, as are MSCs and bone marrow-derived (stromal, osteogenic) stem cells (BMSCs), whose plasticity is actually overestimated (i.e., trans-differentiation along non-mesodermal lineages, including neural fates). In order to better understand failure in the "regenerative" use of SCs for neurological disorders, it could be helpful to understand how NSCs and BMSCs have adapted to their respective organ niches. In this perspective, here the adult osteogenic and neurogenic niches are considered and compared within their in vivo environment.
    Language English
    Publishing date 2015-11-24
    Publishing country Switzerland
    Document type Journal Article ; Review
    ZDB-ID 2452963-1
    ISSN 1662-5102
    ISSN 1662-5102
    DOI 10.3389/fncel.2015.00455
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: Molecular and functional heterogeneity in dorsal and ventral oligodendrocyte progenitor cells of the mouse forebrain in response to DNA damage.

    Boda, Enrica / Lorenzati, Martina / Parolisi, Roberta / Harding, Brian / Pallavicini, Gianmarco / Bonfanti, Luca / Moccia, Amanda / Bielas, Stephanie / Di Cunto, Ferdinando / Buffo, Annalisa

    Nature communications

    2022  Volume 13, Issue 1, Page(s) 2331

    Abstract: In the developing mouse forebrain, temporally distinct waves of oligodendrocyte progenitor cells (OPCs) arise from different germinal zones and eventually populate either dorsal or ventral regions, where they present as transcriptionally and functionally ...

    Abstract In the developing mouse forebrain, temporally distinct waves of oligodendrocyte progenitor cells (OPCs) arise from different germinal zones and eventually populate either dorsal or ventral regions, where they present as transcriptionally and functionally equivalent cells. Despite that, developmental heterogeneity influences adult OPC responses upon demyelination. Here we show that accumulation of DNA damage due to ablation of citron-kinase or cisplatin treatment cell-autonomously disrupts OPC fate, resulting in cell death and senescence in the dorsal and ventral subsets, respectively. Such alternative fates are associated with distinct developmental origins of OPCs, and with a different activation of NRF2-mediated anti-oxidant responses. These data indicate that, upon injury, dorsal and ventral OPC subsets show functional and molecular diversity that can make them differentially vulnerable to pathological conditions associated with DNA damage.
    MeSH term(s) Animals ; DNA Damage ; Mice ; Oligodendrocyte Precursor Cells/physiology ; Oligodendroglia/metabolism ; Prosencephalon
    Language English
    Publishing date 2022-04-28
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2553671-0
    ISSN 2041-1723 ; 2041-1723
    ISSN (online) 2041-1723
    ISSN 2041-1723
    DOI 10.1038/s41467-022-30010-6
    Database MEDical Literature Analysis and Retrieval System OnLINE

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