|A personal message from Dr Mark Hill (May 2020)
| I have decided to take early retirement in September 2020. During the many years online I have received wonderful feedback from many readers, researchers and students interested in human embryology. I especially thank my research collaborators and contributors to the site. The good news is Embryology will remain online and I will continue my association with UNSW Australia. I look forward to updating and including the many exciting new discoveries in Embryology!
|Schwann cells are glial cells that originate and development from neural crest cells migrating out along the developing nerve fibers. These cells differentiate to wrap around nerve axon processes to form myelin sheaths that improve nerve conduction. This process of myelination occurs also within the central nervous system by another population of glial cells. (More? gliogenesis)
|Theodor Schwann (1810 - 1882), was a German physiologist and the first to discover the "Schwann cell" in the peripheral nervous system. He was also, along with Matthias Jakob Schleiden (1804-1881), in 1838 the developer of the "cell theory".
Some Recent Findings
- Dual origin of enteric neurons in vagal Schwann cell precursors and the sympathetic neural crest "Most of the enteric nervous system derives from the "vagal" neural crest, lying at the level of somites 1-7, which invades the digestive tract rostro-caudally from the foregut to the hindgut. Little is known about the initial phase of this colonization, which brings enteric precursors into the foregut. Here we show that the "vagal crest" subsumes two populations of enteric precursors with contrasted origins, initial modes of migration, and destinations. Crest cells adjacent to somites 1 and 2 produce Schwann cell precursors that colonize the vagus nerve, which in turn guides them into the esophagus and stomach. Crest cells adjacent to somites 3-7 belong to the crest streams contributing to sympathetic chains: they migrate ventrally, seed the sympathetic chains, and colonize the entire digestive tract thence. Accordingly, enteric ganglia, like sympathetic ones, are atrophic when deprived of signaling through the tyrosine kinase receptor ErbB3, while half of the esophageal ganglia require, like parasympathetic ones, the nerve-associated form of the ErbB3 ligand, Neuregulin-1. These dependencies might bear relevance to Hirschsprung disease, with which alleles of Neuregulin-1 are associated."
- How Schwann Cells Sort Axons: New Concepts "Peripheral nerves contain large myelinated and small unmyelinated (Remak) fibers that perform different functions. The choice to myelinate or not is dictated to Schwann cells by the axon itself, based on the amount of neuregulin I-type III exposed on its membrane. Peripheral axons are more important in determining the final myelination fate than central axons, and the implications for this difference in Schwann cells and oligodendrocytes are discussed. Interestingly, this choice is reversible during pathology, accounting for the remarkable plasticity of Schwann cells, and contributing to the regenerative potential of the peripheral nervous system. Radial sorting is the process by which Schwann cells choose larger axons to myelinate during development."
|More recent papers
This table allows an automated computer search of the external PubMed database using the listed "Search term" text link.
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- The displayed list of references do not reflect any editorial selection of material based on content or relevance.
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More? References | Discussion Page | Journal Searches | 2019 References | 2020 References
Search term: Schwann Cell Development | Peripheral Myelination Development
|These papers originally appeared in the Some Recent Findings table, but as that list grew in length have now been shuffled down to this collapsible table.
See also the Discussion Page for other references listed by year and References on this current page.
- Neural crest origin of olfactory ensheathing glia "Olfactory ensheathing cells (OECs) are a unique class of glial cells with exceptional translational potential because of their ability to support axon regeneration in the central nervous system. Although OECs are similar in many ways to immature and nonmyelinating Schwann cells, and can myelinate large-diameter axons indistinguishably from myelination by Schwann cells, current dogma holds that OECs arise from the olfactory epithelium. Here, using fate-mapping techniques in chicken embryos and genetic lineage tracing in mice, we show that OECs in fact originate from the neural crest and hence share a common developmental heritage with Schwann cells."
- Schwann cell precursors from nerve innervation are a cellular origin of melanocytes in skin "Current opinion holds that pigment cells, melanocytes, are derived from neural crest cells produced at the dorsal neural tube and that migrate under the epidermis to populate all parts of the skin. Here, we identify growing nerves projecting throughout the body as a stem/progenitor niche containing Schwann cell precursors (SCPs) from which large numbers of skin melanocytes originate. SCPs arise as a result of lack of neuronal specification by Hmx1 homeobox gene function in the neural crest ventral migratory pathway. Schwann cell and melanocyte development share signaling molecules with both the glial and melanocyte cell fates intimately linked to nerve contact and regulated in an opposing manner by Neuregulin and soluble signals including insulin-like growth factor and platelet-derived growth factor. These results reveal SCPs as a cellular origin of melanocytes, and have broad implications on the molecular mechanisms regulating skin pigmentation during development, in health and pigmentation disorders."
Schwann cell myelination
|Schwann cell myelination
Mouse- spinal cord axons
- ↑ Espinosa-Medina I, Jevans B, Boismoreau F, Chettouh Z, Enomoto H, Müller T, Birchmeier C, Burns AJ & Brunet JF. (2017). Dual origin of enteric neurons in vagal Schwann cell precursors and the sympathetic neural crest. Proc. Natl. Acad. Sci. U.S.A. , 114, 11980-11985. PMID: 29078343 DOI.
- ↑ Feltri ML, Poitelon Y & Previtali SC. (2016). How Schwann Cells Sort Axons: New Concepts. Neuroscientist , 22, 252-65. PMID: 25686621 DOI.
- ↑ Barraud P, Seferiadis AA, Tyson LD, Zwart MF, Szabo-Rogers HL, Ruhrberg C, Liu KJ & Baker CV. (2010). Neural crest origin of olfactory ensheathing glia. Proc. Natl. Acad. Sci. U.S.A. , 107, 21040-5. PMID: 21078992 DOI.
- ↑ Adameyko I, Lallemend F, Aquino JB, Pereira JA, Topilko P, Müller T, Fritz N, Beljajeva A, Mochii M, Liste I, Usoskin D, Suter U, Birchmeier C & Ernfors P. (2009). Schwann cell precursors from nerve innervation are a cellular origin of melanocytes in skin. Cell , 139, 366-79. PMID: 19837037 DOI.
Adameyko I & Lallemend F. (2010). Glial versus melanocyte cell fate choice: Schwann cell precursors as a cellular origin of melanocytes. Cell. Mol. Life Sci. , 67, 3037-55. PMID: 20454996 DOI.
Piaton G, Gould RM & Lubetzki C. (2010). Axon-oligodendrocyte interactions during developmental myelination, demyelination and repair. J. Neurochem. , 114, 1243-60. PMID: 20524961 DOI.
Chong SY & Chan JR. (2010). Tapping into the glial reservoir: cells committed to remaining uncommitted. J. Cell Biol. , 188, 305-12. PMID: 20142420 DOI.
Kaplan S, Odaci E, Unal B, Sahin B & Fornaro M. (2009). Chapter 2: Development of the peripheral nerve. Int. Rev. Neurobiol. , 87, 9-26. PMID: 19682631 DOI.
Search Pubmed: Schwann Cell Development | Schwann Cell | Schwann Myelination Development
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Cite this page: Hill, M.A. (2020, July 16) Embryology Neural Crest - Schwann Cell Development. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/Neural_Crest_-_Schwann_Cell_Development
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