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  • Title: Peripheral contributions to olfactory bulb cell populations (migrations towards the olfactory bulb).
    Author: Blanchart A, Martín-López E, De Carlos JA, López-Mascaraque L.
    Journal: Glia; 2011 Feb; 59(2):278-92. PubMed ID: 21125652.
    Abstract:
    The olfactory system represents one of the most suitable models to study interactions between the peripheral and central nervous systems. The developing olfactory epithelium (olfactory placode and pit) gives rise to several cell populations that migrate towards the telencephalic vesicle. One of these cell populations, called the Migratory Mass (MM), accompanies the first emerging olfactory axons from the olfactory placode, but the fate of these cells and their contribution to the Olfactory Bulb (OB) populations has not been properly addressed. To asses this issue we performed ultrasound-guided in utero retroviral injections at embryonic day (E) 11 revealing the MM as an early source of Olfactory Ensheathing Cells in later postnatal stages. Employing a wide number of antibodies to identify the nature of the infected cells we described that those cells generated within the MM at E11 belong to different cell populations both in the mesenchyma, where they envelop olfactory axons and express the most common glial markers, and in the olfactory bulb, where they are restricted to the Olfactory Nerve and Glomerular layers. Thus, the data reveal the existence of a novel progenitor class within the MM, potentially derived from the olfactory placode which gives rise to different neural cell population including some CNS neurons, glia and olfactory ensheathing cells.
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