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  • 1.
    Garcia-Bennett, Alfonso E.
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Nanotechnology and Functional Materials.
    Kozhevnikova, Mariya
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Neuroscience, Neuroanatomy.
    König, Niclas
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Neuroscience, Neuroanatomy.
    Zhou, Chunfang
    Leao, Richardson
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Neuroscience, Developmental Genetics.
    Knöpfel, Thomas
    Pankratova, Stanislava
    Trolle, Carl
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Neuroscience, Neuroanatomy.
    Berezin, Vladimir
    Bock, Elisabeth
    Aldskogius, Håkan
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Neuroscience, Neuroanatomy.
    Kozlova, Elena N.
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Neuroscience, Neuroanatomy.
    Delivery of Differentiation Factors by Mesoporous Silica Particles Assists Advanced Differentiation of Transplanted Murine Embryonic Stem Cells2013In: Stem Cells Translational Medicine, ISSN 2157-6564, E-ISSN 2157-6580, Vol. 2, no 11, p. 906-915Article in journal (Refereed)
    Abstract [en]

    Stem cell transplantation holds great hope for the replacement of damaged cells in the nervous system. However, poor long-term survival after transplantation and insufficiently robust differentiation of stem cells into specialized cell types in vivo remain major obstacles for clinical application. Here, we report the development of a novel technological approach for the local delivery of exogenous trophic factor mimetics to transplanted cells using specifically designed silica nanoporous particles. We demonstrated that delivering Cintrofin and Gliafin, established peptide mimetics of the ciliary neurotrophic factor and glial cell line-derived neurotrophic factor, respectively, with these particles enabled not only robust functional differentiation of motor neurons from transplanted embryonic stem cells but also their long-term survival in vivo. We propose that the delivery of growth factors by mesoporous nanoparticles is a potentially versatile and widely applicable strategy for efficient differentiation and functional integration of stem cell derivatives upon transplantation.

  • 2.
    Garcia-Bennett, Alfonso
    et al.
    Stockholm University.
    König, Niclas
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Neuroscience, Regenerative neurobiology.
    Abrahamsson, Ninnie
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Neuroscience, Regenerative neurobiology.
    Kozhevnikova, Mariya
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Neuroscience.
    Zhou, Chunfang
    Trolle, Carl
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Neuroscience, Regenerative neurobiology.
    Pankratova, Stanislava
    Copenhagen University.
    Berezin, Vladimir
    Copenhagen University.
    Kozlova, Elena
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Neuroscience, Regenerative neurobiology.
    In vitro generation of motor neuron precursors from mouse embryonic stem cells using mesoporous nanoparticles2014In: Nanomedicine, ISSN 1743-5889, E-ISSN 1748-6963, Vol. 9, no 16, p. 2457-2466Article in journal (Refereed)
    Abstract [en]

    Aim: Stem cell-derived motor neurons (MNs) are utilized to develop replacement strategies for spinal cord disorders. Differentiation of embryonic stem cells into MN precursors involves factors and their repeated administration. We investigated if delivery of factors loaded into mesoporous nanoparticles could be effective for stem cell differentiation in vitro.

    Materials & methods: We used a mouse embryonic stem cell line expressing green fluorescent protein under the promoter for the MN-specific gene Hb9 to visualize the level of MN differentiation. The differentiation of stem cells was evaluated by expression of MN-specific transcription factors monitored by quantitative real-time PCR reactions and immunocytochemistry.

    Results: Mesoporous nanoparticles have strong affiliation to the embryoid bodies, penetrate inside the embryoid bodies and come in contact with differentiating cells.

    Conclusion: Repeated administration of soluble factors into a culture medium can be avoided due to a sustained release effect using mesoporous silica.

  • 3.
    Hoeber, Jan
    et al.
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Neuroscience, Regenerative neurobiology.
    König, Niclas
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Neuroscience, Regenerative neurobiology.
    Trolle, Carl
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Neuroscience, Regenerative neurobiology.
    Lekholm, Emilia
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Pharmacy, Department of Pharmaceutical Biosciences. Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Neuroscience, Functional Pharmacology.
    Zhou, Chunfang
    Nanologica AB , Södertälje, Sweden.
    Pankratova, Stanislava
    Univ Copenhagen, Inst Neurosci & Pharmacol, Copenhagen, Denmark.
    Åkesson, Elisabet
    Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, Stockholm, Sweden.
    Fredriksson, Robert
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Pharmacy, Department of Pharmaceutical Biosciences.
    Aldskogius, Håkan
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Neuroscience, Regenerative neurobiology.
    Kozlova, Elena
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Neuroscience, Regenerative neurobiology.
    A Combinatorial Approach to Induce Sensory Axon Regeneration into the Dorsal Root Avulsed Spinal Cord2017In: Stem Cells and Development, ISSN 1547-3287, E-ISSN 1557-8534, Vol. 26, no 14, p. 1065-1077Article in journal (Refereed)
    Abstract [en]

    Spinal root injuries result in newly formed glial scar formation, which prevents regeneration of sensory axons causing permanent sensory loss. Previous studies showed that delivery of trophic factors or implantation of human neural progenitor cells supports sensory axon regeneration and partly restores sensory functions. In this study, we elucidate mechanisms underlying stem cell-mediated ingrowth of sensory axons after dorsal root avulsion (DRA). We show that human spinal cord neural stem/progenitor cells (hscNSPC), and also, mesoporous silica particles loaded with growth factor mimetics (MesoMIM), supported sensory axon regeneration. However, when hscNSPC and MesoMIM were combined, sensory axon regeneration failed. Morphological and tracing analysis showed that sensory axons grow through the newly established glial scar along "bridges" formed by migrating stem cells. Coimplantation of MesoMIM prevented stem cell migration, "bridges" were not formed, and sensory axons failed to enter the spinal cord. MesoMIM applied alone supported sensory axons ingrowth, but without affecting glial scar formation. In vitro, the presence of MesoMIM significantly impaired migration of hscNSPC without affecting their level of differentiation. Our data show that (1) the ability of stem cells to migrate into the spinal cord and organize cellular "bridges" in the newly formed interface is crucial for successful sensory axon regeneration, (2) trophic factor mimetics delivered by mesoporous silica may be a convenient alternative way to induce sensory axon regeneration, and (3) a combinatorial approach of individually beneficial components is not necessarily additive, but can be counterproductive for axonal growth.

  • 4.
    Hoeber, Jan
    et al.
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Neuroscience, Regenerative neurobiology.
    Trolle, Carl
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Neuroscience, Regenerative neurobiology.
    König, Niclas
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Neuroscience, Regenerative neurobiology.
    Du, Zhongwei
    Gallo, Alessandro
    Hermans, Emmanuel
    Aldskogius, Håkan
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Neuroscience, Regenerative neurobiology.
    Shortland, Peter
    Zhang, Su-Chun
    Deumens, Ronald
    Kozlova, Elena N
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Neuroscience, Regenerative neurobiology.
    Human Embryonic Stem Cell-Derived Progenitors Assist Functional Sensory Axon Regeneration after Dorsal Root Avulsion Injury2015In: Scientific Reports, ISSN 2045-2322, E-ISSN 2045-2322, Vol. 5, article id 10666Article in journal (Refereed)
    Abstract [en]

    Dorsal root avulsion results in permanent impairment of sensory functions due to disconnection between the peripheral and central nervous system. Improved strategies are therefore needed to reconnect injured sensory neurons with their spinal cord targets in order to achieve functional repair after brachial and lumbosacral plexus avulsion injuries. Here, we show that sensory functions can be restored in the adult mouse if avulsed sensory fibers are bridged with the spinal cord by human neural progenitor (hNP) transplants. Responses to peripheral mechanical sensory stimulation were significantly improved in transplanted animals. Transganglionic tracing showed host sensory axons only in the spinal cord dorsal horn of treated animals. Immunohistochemical analysis confirmed that sensory fibers had grown through the bridge and showed robust survival and differentiation of the transplants. Section of the repaired dorsal roots distal to the transplant completely abolished the behavioral improvement. This demonstrates that hNP transplants promote recovery of sensorimotor functions after dorsal root avulsion, and that these effects are mediated by spinal ingrowth of host sensory axons. These results provide a rationale for the development of novel stem cell-based strategies for functionally useful bridging of the peripheral and central nervous system.

  • 5.
    Kosykh, Anastasiia
    et al.
    Laboratory of Cell Proliferation, Koltzov Institute of Developmental Biology, Russian Academy of Sciences, Moscow, Russia.
    Ngamjariyawat, Anongnad
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Neuroscience, Regenerative neurobiology.
    Vasylovska, Svitlana
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Neuroscience, Regenerative neurobiology.
    König, Niclas
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Neuroscience, Regenerative neurobiology.
    Trolle, Carl
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Neuroscience, Regenerative neurobiology.
    Lau, Joey
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Medical Cell Biology.
    Mikaelyan, Arsen
    Laboratory of Cell Proliferation, Koltzov Institute of Developmental Biology, Russian Academy of Sciences, Moscow, Russia.
    Panchenko, Michael
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Neuroscience, Regenerative neurobiology.
    Carlsson, Per-Ola
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Medical Cell Biology.
    Vorotelyak, Ekaterina
    Laboratory of Cell Proliferation, Koltzov Institute of Developmental Biology, Russian Academy of Sciences, Moscow, Russia.
    N. Kozlova, Elena
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Neuroscience, Regenerative neurobiology.
    Neural crest stem cells from hair follicles and boundary cap have different  effects on pancreatic islets in vitro2015In: International Journal of Neuroscience, ISSN 0020-7454, E-ISSN 1563-5279, Vol. 125, no 7, p. 547-554Article in journal (Refereed)
    Abstract [en]

    Purpose:

    Neural crest stem cells derived from the boundary cap (bNCSCs), markedly promote survival, proliferation and function of insulin producing β-cells in vitro and in vivo after coculture/transplantation with pancreatic islets [ 1, 2 ]. Recently, we have shown that beneficial effects on β-cells require cadherin contacts between bNCSCs and β-cells [ 3, 4 ]. Here we investigated whether hair follicle (HF) NCSCs, a potential source for human allogeneic transplantation, exert similar positive effects on β-cells.

    Materials and Methods:

    We established cocultures of HF-NCSCs or bNCSCs from mice expressing enhanced green fluorescent protein together with pancreatic islets from DxRed expressing mice or NMRI mice and compared their migration towards islet cells and effect on proliferation of β-cells as well as intracellular relations between NCSCs and islets using qRT-PCR analysis and immunohistochemistry.

    Results:

    Whereas both types of NCSCs migrated extensively in the presence of islets, only bNCSCs demonstrated directed migration toward islets, induced β-cell proliferation and increased the presence of cadherin at the junctions between bNCSCs and β-cells. Even in direct contact between β-cells and HF-NCSCs, no cadherin expression was detected.

    Conclusions:

    These observations indicate that HF-NCSCs do not confer the same positive effect on β-cells as demonstrated for bNCSCs. Furthermore, these data suggest that induction of cadherin expression by HF-NCSCs may be useful for their ability to support β-cells in coculture and after transplantation.

  • 6.
    König, Niclas
    et al.
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Neuroscience, Neuroanatomy.
    Trolle, Carl
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Neuroscience, Neuroanatomy.
    Kapuralin, Katarina
    University of Zagreb School of Medicine.
    Adameyko, Igor
    Karolinska Institutet.
    Mitrecic, Dinko
    University of Zagreb School of Medicine.
    Aldskogius, Håkan
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Neuroscience, Neuroanatomy.
    Shortland, Peter
    Queen Mary University of London.
    Kozlova, Elena
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Neuroscience, Neuroanatomy.
    Murine neural crest stem cells and embryonic stem cell derived neuron precursors survive and differentiate after transplantation in a model of dorsal root avulsion2017In: Journal of Tissue Engineering and Regenerative Medicine, ISSN 1932-6254, E-ISSN 1932-7005, Vol. 11, no 1, p. 129-137Article in journal (Refereed)
    Abstract [en]

    Spinal root avulsion results in paralysis and sensory loss, and is commonly associated with chronic pain. In addition to the failure of avulsed dorsal root axons to regenerate into the spinal cord, avulsion injury leads to extensive neuroinflammation and degeneration of second order neurons in the dorsal horn. The ultimate objective with the treatment of this condition is to counteract degeneration of spinal cord neurons and to achieve functionally useful regeneration/reconnection of sensory neurons with spinal cord neurons. Here we explore if stem cells transplanted on the surface of avulsed spinal cord can survive, differentiate and migrate into the damaged spinal cord during the first few weeks after this intervention. Murine boundary cap neural crest stem cells (bNCSCs) or embryonic stem cell (ESC)-derived, pre-differentiated neuron precursors were implanted acutely at the junction between avulsed dorsal roots L3-L6 and the spinal cord. Both types of cells survived transplantation, but showed distinctly different modes of differentiation. Thus, bNCSCs migrated into the spinal cord, expressed glial markers, and formed elongated tubes in the peripheral nervous system (PNS) compartment of the avulsed dorsal root transitional zone(DRTZ) area. In contrast, the ESC-transplants remained at the site of implantation and differentiated to motor neurons and interneurons. These data show that both stem cell types successfully survive implantation to the acutely injured spinal cord and maintained their differentiation and migration potential. These data suggest that depending on the source of neural stem cells, they can play different beneficial roles for recovery after dorsal root avulsion.

  • 7.
    König, Niclas
    et al.
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Neuroscience, Neuroanatomy.
    Åkesson, Elisabet
    Telorack, Michèle
    Vasylovska, Svitlana
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Neuroscience, Neuroanatomy.
    Ngamjariyawat, Anongnad
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Neuroscience, Neuroanatomy.
    Sundström, Erik
    Oster, Andreas
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Neuroscience, Neuroanatomy.
    Trolle, Carl
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Neuroscience, Neuroanatomy.
    Berens, Christian
    Aldskogius, Håkan
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Neuroscience, Neuroanatomy.
    Seiger, Åke
    Kozlova, Elena N
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Neuroscience, Neuroanatomy.
    Forced Runx1 expression in human neural stem/progenitor cells transplanted to the rat dorsal root ganglion cavity results in extensive axonal growth specifically from spinal cord-derived neurospheres2011In: Stem Cells and Development, ISSN 1547-3287, E-ISSN 1557-8534, Vol. 20, no 11, p. 1847-1857Article in journal (Refereed)
    Abstract [en]

    Cell replacement therapy holds great promise for treating a wide range of human disorders. However, ensuring the predictable differentiation of transplanted stem cells, eliminating their risk of tumor formation, and generating fully functional cells after transplantation remain major challenges in regenerative medicine. Here, we explore the potential of human neural stem/progenitor cells isolated from the embryonic forebrain (hfNSPCs) or the spinal cord (hscNSPCs) to differentiate to projection neurons when transplanted into the dorsal root ganglion cavity of adult recipient rats. To stimulate axonal growth, we transfected hfNSPC- and hscNSPC-derived neurospheres, prior to their transplantation, with a Tet-Off Runx1-overexpressing plasmid to maintain Runx1 expression in vivo after transplantation. Although pronounced cell differentiation was found in the Runx1-expressing transplants from both cell sources, we observed extensive, long-distance growth of axons exclusively from hscNSPC-derived transplants. These axons ultimately reached the dorsal root transitional zone, the boundary separating peripheral and central nervous systems. Our data show that hscNSPCs have the potential to differentiate to projection neurons with long-distance axonal outgrowth and that Runx1 overexpression is a useful approach to induce such outgrowth in specific sources of NSPCs.

  • 8.
    Trolle, Carl
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Neuroscience.
    Stem cell transplantation and regeneration after dorsal root avulsion2016Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    Spinal root avulsion leads to paralysis and loss of sensory function. Surgical methods can improve motor function and ameliorate pain but sensory recovery in adults is poor. Previous studies have shown that cell transplantation or treatment with trophic factors can improve functional outcome in rodents after dorsal root transection or crush. Here, a dorsal root injury model, more similar to human avulsion injuries, was used. The aims of this thesis were to investigate the behaviour of different stem cells following transplantation to avulsed dorsal roots and asses their potential to serve as possible regenerative therapy. In paper I, different murine stem cell types were transplanted to avulsed dorsal roots in rats. Murine embryonic stem cells remained outside the spinal cord and were surrounded by glutamatergic terminals. Boundary cap neural crest stem cells (bNCSC) formed elongated bands outside the spinal cord and migrated to the spinal cord as single cells. In paper II, transplanted bNCSC were further characterized. bNCSC remaining outside the spinal cord expressed glial markers and were associated with different types of sensory fibres. bNCSC that migrated into the injured spinal cord expressed different neuronal markers. In paper III, effects of bNCSC transplantation on local vasculature and glial scar formation were studied. bNCSC increase angiogenesis in a non dose response manner and participate in boundary glial scar formation. In paper IV, bNCSC spinal migration was analysed using two different injury models - dorsal root transection and dorsal root avulsion. In addition, bNCSC capacity to support sensory regeneration was assessed and the results suggest that bNCSC do not support robust regeneration of avulsed afferents. In paper V, an in vitro stem cell model system was used to assess the possibility of using artificial nanomaterials to deliver differentiation factors. Cells treated with either soluble factors or particle-delivered factors showed similar differentiation patterns. Stem cell transplantation offers several opportunities following dorsal root avulsion, including cell replacement and regenerative support. By elucidating the mechanisms by which stem cells can assist regeneration of avulsed afferents will allow for more targeted or combinatorial approaches, including growth factor treatment.

    List of papers
    1. Murine neural crest stem cells and embryonic stem cell derived neuron precursors survive and differentiate after transplantation in a model of dorsal root avulsion
    Open this publication in new window or tab >>Murine neural crest stem cells and embryonic stem cell derived neuron precursors survive and differentiate after transplantation in a model of dorsal root avulsion
    Show others...
    2017 (English)In: Journal of Tissue Engineering and Regenerative Medicine, ISSN 1932-6254, E-ISSN 1932-7005, Vol. 11, no 1, p. 129-137Article in journal (Refereed) Published
    Abstract [en]

    Spinal root avulsion results in paralysis and sensory loss, and is commonly associated with chronic pain. In addition to the failure of avulsed dorsal root axons to regenerate into the spinal cord, avulsion injury leads to extensive neuroinflammation and degeneration of second order neurons in the dorsal horn. The ultimate objective with the treatment of this condition is to counteract degeneration of spinal cord neurons and to achieve functionally useful regeneration/reconnection of sensory neurons with spinal cord neurons. Here we explore if stem cells transplanted on the surface of avulsed spinal cord can survive, differentiate and migrate into the damaged spinal cord during the first few weeks after this intervention. Murine boundary cap neural crest stem cells (bNCSCs) or embryonic stem cell (ESC)-derived, pre-differentiated neuron precursors were implanted acutely at the junction between avulsed dorsal roots L3-L6 and the spinal cord. Both types of cells survived transplantation, but showed distinctly different modes of differentiation. Thus, bNCSCs migrated into the spinal cord, expressed glial markers, and formed elongated tubes in the peripheral nervous system (PNS) compartment of the avulsed dorsal root transitional zone(DRTZ) area. In contrast, the ESC-transplants remained at the site of implantation and differentiated to motor neurons and interneurons. These data show that both stem cell types successfully survive implantation to the acutely injured spinal cord and maintained their differentiation and migration potential. These data suggest that depending on the source of neural stem cells, they can play different beneficial roles for recovery after dorsal root avulsion.

    Place, publisher, year, edition, pages
    John Wiley & Sons, 2017
    Keywords
    sensory neuron, spinal cord, dorsal root transitional zone, regeneration, migration, glial cells, Schwann cells, motor neurons
    National Category
    Neurosciences
    Research subject
    Neuroscience
    Identifiers
    urn:nbn:se:uu:diva-218684 (URN)10.1002/term.1893 (DOI)000394173600012 ()24753366 (PubMedID)
    Funder
    Swedish Research Council, 20716
    Available from: 2014-02-14 Created: 2014-02-14 Last updated: 2018-01-11Bibliographically approved
    2. Boundary cap neural crest stem cells homotopically implanted to the injured dorsal root transitional zone give rise to different types of neurons and glia in adult rodents
    Open this publication in new window or tab >>Boundary cap neural crest stem cells homotopically implanted to the injured dorsal root transitional zone give rise to different types of neurons and glia in adult rodents
    Show others...
    2014 (English)In: BMC neuroscience (Online), ISSN 1471-2202, E-ISSN 1471-2202, Vol. 15, p. 60-Article in journal (Refereed) Published
    Abstract [en]

    The boundary cap is a transient group of neural crest-derived cells located at the presumptive dorsal root transitional zone (DRTZ) when sensory axons enter the spinal cord during development. Later, these cells migrate to dorsal root ganglia and differentiate into subtypes of sensory neurons and glia. After birth when the DRTZ is established, sensory axons are no longer able to enter the spinal cord. Here we explored the fate of mouse bNCSCs implanted to the uninjured DRTZ after dorsal root avulsion for their potential to assist sensory axon regeneration. Grafted cells showed extensive survival and differentiation after transplantation to the avulsed DRTZ. Transplanted cells located outside the spinal cord organized elongated tubes of Sox2/GFAP expressing cells closely associated with regenerating sensory axons or appeared as small clusters on the surface of the spinal cord. Others, migrating into the host spinal cordas single cells, differentiated to spinal cord neurons with different neurotransmitter characteristics, extensive fiber organization, and in some cases surrounded by glutamatergic terminal-like profiles. These findings demonstrate that bNCSCs implanted at the site of dorsal root avulsion injury display remarkable differentiation plasticity inside the spinal cord and in the peripheral compartment where they organize tubes associated with regenerating sensory fibers. These properties offer a basis for exploring the ability of bNCSCs to assist regeneration of sensory axons into the spinal cord and replace lost neurons in the injured spinal cord.

    Place, publisher, year, edition, pages
    BioMed Central, 2014
    Keywords
    neural stem cell, sensory neuron, spinal cord injury, cell differentiation, nerve regeneration, cell replacement
    National Category
    Neurosciences Neurology
    Research subject
    Neuroscience
    Identifiers
    urn:nbn:se:uu:diva-218685 (URN)10.1186/1471-2202-15-60 (DOI)000337318200001 ()
    Funder
    Swedish Research Council, 20716Swedish Research Council, 5420
    Available from: 2014-02-14 Created: 2014-02-14 Last updated: 2018-01-11Bibliographically approved
    3. Transplanted boundary cap neural crest stem cells promote angiogenesis but do not modify glial scar formation after dorsal root avulsion in the mouse
    Open this publication in new window or tab >>Transplanted boundary cap neural crest stem cells promote angiogenesis but do not modify glial scar formation after dorsal root avulsion in the mouse
    (English)Manuscript (preprint) (Other academic)
    National Category
    Neurosciences
    Research subject
    Neuroscience
    Identifiers
    urn:nbn:se:uu:diva-265848 (URN)
    Available from: 2015-11-03 Created: 2015-11-03 Last updated: 2018-01-10
    4. The fate of boundary cap neural crest stem cells after different types of dorsal root injury
    Open this publication in new window or tab >>The fate of boundary cap neural crest stem cells after different types of dorsal root injury
    (English)Manuscript (preprint) (Other academic)
    National Category
    Neurosciences
    Research subject
    Neuroscience
    Identifiers
    urn:nbn:se:uu:diva-265846 (URN)
    Available from: 2015-11-03 Created: 2015-11-03 Last updated: 2018-01-10
    5. In vitro generation of motor neuron precursors from mouse embryonic stem cells using mesoporous nanoparticles
    Open this publication in new window or tab >>In vitro generation of motor neuron precursors from mouse embryonic stem cells using mesoporous nanoparticles
    Show others...
    2014 (English)In: Nanomedicine, ISSN 1743-5889, E-ISSN 1748-6963, Vol. 9, no 16, p. 2457-2466Article in journal (Refereed) Published
    Abstract [en]

    Aim: Stem cell-derived motor neurons (MNs) are utilized to develop replacement strategies for spinal cord disorders. Differentiation of embryonic stem cells into MN precursors involves factors and their repeated administration. We investigated if delivery of factors loaded into mesoporous nanoparticles could be effective for stem cell differentiation in vitro.

    Materials & methods: We used a mouse embryonic stem cell line expressing green fluorescent protein under the promoter for the MN-specific gene Hb9 to visualize the level of MN differentiation. The differentiation of stem cells was evaluated by expression of MN-specific transcription factors monitored by quantitative real-time PCR reactions and immunocytochemistry.

    Results: Mesoporous nanoparticles have strong affiliation to the embryoid bodies, penetrate inside the embryoid bodies and come in contact with differentiating cells.

    Conclusion: Repeated administration of soluble factors into a culture medium can be avoided due to a sustained release effect using mesoporous silica.

    National Category
    Neurosciences Medical Biotechnology Medical Biotechnology (with a focus on Cell Biology (including Stem Cell Biology), Molecular Biology, Microbiology, Biochemistry or Biopharmacy)
    Identifiers
    urn:nbn:se:uu:diva-224650 (URN)10.2217/nnm.14.23 (DOI)000346177600004 ()
    Note

    De 2 förstaförfattarna delar förstaförfattarskapet

    Available from: 2014-05-16 Created: 2014-05-16 Last updated: 2018-01-11Bibliographically approved
  • 9.
    Trolle, Carl
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Neuroscience.
    Stem Cell Transplantation in Dorsal Root Injury2014Licentiate thesis, comprehensive summary (Other academic)
    Abstract [en]

    After traumatic injuries to the brachial plexus there is a risk that one or more of the spinal roots are torn from the spinal cord, known as avulsion injury. This often leads to paralysis and chronic pain, notoriously difficult to treat with current pharmacotherapy. Surgical treatment may improve motor function but sensory recovery is usually poor as sensory axons fail to establish functional connections inside the spinal cord. The aims of this thesis were to develop a model for dorsal root avulsion in rodents in order to investigate the potentials of stem cell therapy for enhancing sensory regeneration after spinal root avulsion. Two different types of stem cells, embryonic and neural crest stem cells, have been transplanted to the avulsion model and analysed using immunohistochemical methods. The results indicate that stem cells survive after transplantation to the avulsed dorsal root and associate with regenerating axons. Furthermore, the different stem cells display different phenotypes after transplantation where embryonic stem cells give rise to neurons located outside the spinal cord that could serve as projection neurons whereas the neural crest stem cells form elongated tubes outlining the avulsed dorsal root and are associated with regenerating neuronal fibers. We have also discovered that the neural crest stem cells migrate into the damaged spinal cord as single cells. The neural crest stem cells also display a diversity in generating both neuronal and glial cells that may have different beneficial effects in neural repair following dorsal root avulsion. To improve the survival of stem cell transplants, the potentials of co-transplanting embryonic stem cells together with nanoparticle delivered growth factor mimetics has been investigated. The results indicate that nanoparticle delivered growth factors improve both transplant survival and maturation in comparison to untreated controls and may be a promising strategy in stem cell transplantation.

    List of papers
    1. Murine neural crest stem cells and embryonic stem cell derived neuron precursors survive and differentiate after transplantation in a model of dorsal root avulsion
    Open this publication in new window or tab >>Murine neural crest stem cells and embryonic stem cell derived neuron precursors survive and differentiate after transplantation in a model of dorsal root avulsion
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    2017 (English)In: Journal of Tissue Engineering and Regenerative Medicine, ISSN 1932-6254, E-ISSN 1932-7005, Vol. 11, no 1, p. 129-137Article in journal (Refereed) Published
    Abstract [en]

    Spinal root avulsion results in paralysis and sensory loss, and is commonly associated with chronic pain. In addition to the failure of avulsed dorsal root axons to regenerate into the spinal cord, avulsion injury leads to extensive neuroinflammation and degeneration of second order neurons in the dorsal horn. The ultimate objective with the treatment of this condition is to counteract degeneration of spinal cord neurons and to achieve functionally useful regeneration/reconnection of sensory neurons with spinal cord neurons. Here we explore if stem cells transplanted on the surface of avulsed spinal cord can survive, differentiate and migrate into the damaged spinal cord during the first few weeks after this intervention. Murine boundary cap neural crest stem cells (bNCSCs) or embryonic stem cell (ESC)-derived, pre-differentiated neuron precursors were implanted acutely at the junction between avulsed dorsal roots L3-L6 and the spinal cord. Both types of cells survived transplantation, but showed distinctly different modes of differentiation. Thus, bNCSCs migrated into the spinal cord, expressed glial markers, and formed elongated tubes in the peripheral nervous system (PNS) compartment of the avulsed dorsal root transitional zone(DRTZ) area. In contrast, the ESC-transplants remained at the site of implantation and differentiated to motor neurons and interneurons. These data show that both stem cell types successfully survive implantation to the acutely injured spinal cord and maintained their differentiation and migration potential. These data suggest that depending on the source of neural stem cells, they can play different beneficial roles for recovery after dorsal root avulsion.

    Place, publisher, year, edition, pages
    John Wiley & Sons, 2017
    Keywords
    sensory neuron, spinal cord, dorsal root transitional zone, regeneration, migration, glial cells, Schwann cells, motor neurons
    National Category
    Neurosciences
    Research subject
    Neuroscience
    Identifiers
    urn:nbn:se:uu:diva-218684 (URN)10.1002/term.1893 (DOI)000394173600012 ()24753366 (PubMedID)
    Funder
    Swedish Research Council, 20716
    Available from: 2014-02-14 Created: 2014-02-14 Last updated: 2018-01-11Bibliographically approved
    2. Boundary cap neural crest stem cells homotopically implanted to the injured dorsal root transitional zone give rise to different types of neurons and glia in adult rodents
    Open this publication in new window or tab >>Boundary cap neural crest stem cells homotopically implanted to the injured dorsal root transitional zone give rise to different types of neurons and glia in adult rodents
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    2014 (English)In: BMC neuroscience (Online), ISSN 1471-2202, E-ISSN 1471-2202, Vol. 15, p. 60-Article in journal (Refereed) Published
    Abstract [en]

    The boundary cap is a transient group of neural crest-derived cells located at the presumptive dorsal root transitional zone (DRTZ) when sensory axons enter the spinal cord during development. Later, these cells migrate to dorsal root ganglia and differentiate into subtypes of sensory neurons and glia. After birth when the DRTZ is established, sensory axons are no longer able to enter the spinal cord. Here we explored the fate of mouse bNCSCs implanted to the uninjured DRTZ after dorsal root avulsion for their potential to assist sensory axon regeneration. Grafted cells showed extensive survival and differentiation after transplantation to the avulsed DRTZ. Transplanted cells located outside the spinal cord organized elongated tubes of Sox2/GFAP expressing cells closely associated with regenerating sensory axons or appeared as small clusters on the surface of the spinal cord. Others, migrating into the host spinal cordas single cells, differentiated to spinal cord neurons with different neurotransmitter characteristics, extensive fiber organization, and in some cases surrounded by glutamatergic terminal-like profiles. These findings demonstrate that bNCSCs implanted at the site of dorsal root avulsion injury display remarkable differentiation plasticity inside the spinal cord and in the peripheral compartment where they organize tubes associated with regenerating sensory fibers. These properties offer a basis for exploring the ability of bNCSCs to assist regeneration of sensory axons into the spinal cord and replace lost neurons in the injured spinal cord.

    Place, publisher, year, edition, pages
    BioMed Central, 2014
    Keywords
    neural stem cell, sensory neuron, spinal cord injury, cell differentiation, nerve regeneration, cell replacement
    National Category
    Neurosciences Neurology
    Research subject
    Neuroscience
    Identifiers
    urn:nbn:se:uu:diva-218685 (URN)10.1186/1471-2202-15-60 (DOI)000337318200001 ()
    Funder
    Swedish Research Council, 20716Swedish Research Council, 5420
    Available from: 2014-02-14 Created: 2014-02-14 Last updated: 2018-01-11Bibliographically approved
    3. Delivery of Differentiation Factors by Mesoporous Silica Particles Assists Advanced Differentiation of Transplanted Murine Embryonic Stem Cells
    Open this publication in new window or tab >>Delivery of Differentiation Factors by Mesoporous Silica Particles Assists Advanced Differentiation of Transplanted Murine Embryonic Stem Cells
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    2013 (English)In: Stem Cells Translational Medicine, ISSN 2157-6564, E-ISSN 2157-6580, Vol. 2, no 11, p. 906-915Article in journal (Refereed) Published
    Abstract [en]

    Stem cell transplantation holds great hope for the replacement of damaged cells in the nervous system. However, poor long-term survival after transplantation and insufficiently robust differentiation of stem cells into specialized cell types in vivo remain major obstacles for clinical application. Here, we report the development of a novel technological approach for the local delivery of exogenous trophic factor mimetics to transplanted cells using specifically designed silica nanoporous particles. We demonstrated that delivering Cintrofin and Gliafin, established peptide mimetics of the ciliary neurotrophic factor and glial cell line-derived neurotrophic factor, respectively, with these particles enabled not only robust functional differentiation of motor neurons from transplanted embryonic stem cells but also their long-term survival in vivo. We propose that the delivery of growth factors by mesoporous nanoparticles is a potentially versatile and widely applicable strategy for efficient differentiation and functional integration of stem cell derivatives upon transplantation.

    Keywords
    Cell transplantation, Differentiation, Embryonic stem cells, Nervous system, Neural differentiation, Neural stem cell, Stem cell culture, Transplantation
    National Category
    Natural Sciences Engineering and Technology
    Research subject
    Engineering Science with specialization in Nanotechnology and Functional Materials
    Identifiers
    urn:nbn:se:uu:diva-211443 (URN)10.5966/sctm.2013-0072 (DOI)000326312000017 ()
    Note

    De 3 första författarna delar förstaförfattarskapet

    Available from: 2013-11-27 Created: 2013-11-25 Last updated: 2017-12-06Bibliographically approved
  • 10.
    Trolle, Carl
    et al.
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Neuroscience, Regenerative neurobiology.
    Abrahamsson, Ninnie
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Neuroscience, Regenerative neurobiology.
    König, Niclas
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Neuroscience, Regenerative neurobiology.
    Vasylovska, Svitlana
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Neuroscience, Regenerative neurobiology.
    Kozlova, Elena
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Neuroscience, Regenerative neurobiology.
    Boundary cap neural crest stem cells homotopically implanted to the injured dorsal root transitional zone give rise to different types of neurons and glia in adult rodents2014In: BMC neuroscience (Online), ISSN 1471-2202, E-ISSN 1471-2202, Vol. 15, p. 60-Article in journal (Refereed)
    Abstract [en]

    The boundary cap is a transient group of neural crest-derived cells located at the presumptive dorsal root transitional zone (DRTZ) when sensory axons enter the spinal cord during development. Later, these cells migrate to dorsal root ganglia and differentiate into subtypes of sensory neurons and glia. After birth when the DRTZ is established, sensory axons are no longer able to enter the spinal cord. Here we explored the fate of mouse bNCSCs implanted to the uninjured DRTZ after dorsal root avulsion for their potential to assist sensory axon regeneration. Grafted cells showed extensive survival and differentiation after transplantation to the avulsed DRTZ. Transplanted cells located outside the spinal cord organized elongated tubes of Sox2/GFAP expressing cells closely associated with regenerating sensory axons or appeared as small clusters on the surface of the spinal cord. Others, migrating into the host spinal cordas single cells, differentiated to spinal cord neurons with different neurotransmitter characteristics, extensive fiber organization, and in some cases surrounded by glutamatergic terminal-like profiles. These findings demonstrate that bNCSCs implanted at the site of dorsal root avulsion injury display remarkable differentiation plasticity inside the spinal cord and in the peripheral compartment where they organize tubes associated with regenerating sensory fibers. These properties offer a basis for exploring the ability of bNCSCs to assist regeneration of sensory axons into the spinal cord and replace lost neurons in the injured spinal cord.

  • 11.
    Trolle, Carl
    et al.
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Neuroscience, Regenerative neurobiology.
    Ivert, Patrik
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Neuroscience, Regenerative neurobiology.
    Hoeber, Jan
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Neuroscience, Regenerative neurobiology.
    Rocamonde-Lago, Iris
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Neuroscience, Regenerative neurobiology.
    Vasylovska, Svitlana
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Neuroscience, Regenerative neurobiology.
    Lukanidin, Eugen
    Department of Molecular Cancer Biology, Danish Cancer Society Research Center, Denmark.
    Kozlova, Elena N
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Neuroscience, Regenerative neurobiology.
    Boundary cap neural crest stem cell transplants contribute Mts1/S100A4-expressing cells in the glial scar2017In: Regenerative Medicine, ISSN 1746-0751, E-ISSN 1746-076X, Vol. 12, no 4, p. 339-351Article in journal (Refereed)
    Abstract [en]

    AIM: During development, boundary cap neural crest stem cells (bNCSCs) assist sensory axon growth into the spinal cord. Here we repositioned them to test if they assist regeneration of sensory axons in adult mice after dorsal root avulsion injury.

    MATERIALS & METHODS: Avulsed mice received bNCSC or human neural progenitor (hNP) cell transplants and their contributions to glial scar formation and sensory axon regeneration were analyzed with immunohistochemistry and transganglionic tracing.

    RESULTS: hNPs and bNCSCs form similar gaps in the glial scar, but unlike hNPs, bNCSCs contribute Mts1/S100A4 (calcium-binding protein) expression to the scar and do not assist sensory axon regeneration.

    CONCLUSION: bNCSC transplants contribute nonpermissive Mts1/S100A4-expressing cells to the glial scar after dorsal root avulsion.

  • 12.
    Trolle, Carl
    et al.
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Neuroscience.
    Lukanidin, Eugene
    Danish Cancer Society.
    Christoffersson, Gustaf
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Medical Cell Biology. La Jolla Institute for Allergy and Immunology.
    Kozlova, Elena
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Neuroscience.
    Transplanted boundary cap neural crest stem cells promote angiogenesis but do not modify glial scar formation after dorsal root avulsion in the mouseManuscript (preprint) (Other academic)
  • 13.
    Trolle, Carl
    et al.
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Neuroscience.
    Vasylovska, Svitlana
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Neuroscience.
    Kozlova, Elena
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Neuroscience.
    The fate of boundary cap neural crest stem cells after different types of dorsal root injuryManuscript (preprint) (Other academic)
1 - 13 of 13
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