Lin28 reprograms inner ear glia to a neuronal fate.

Autor: Kempfle JS; Department of Otolaryngology, Harvard Medical School, Boston, Massachusetts, USA.; Eaton-Peabody Laboratory, Massachusetts Eye and Ear, Boston, Massachusetts, USA.; University Department of Otolaryngology, Head and Neck Surgery, Tübingen, Germany., Luu NC; Department of Otolaryngology, Harvard Medical School, Boston, Massachusetts, USA.; Eaton-Peabody Laboratory, Massachusetts Eye and Ear, Boston, Massachusetts, USA.; University Department of Otolaryngology, Head and Neck Surgery, Zürich, Switzerland., Petrillo M; Department of Otolaryngology, Harvard Medical School, Boston, Massachusetts, USA.; Eaton-Peabody Laboratory, Massachusetts Eye and Ear, Boston, Massachusetts, USA., Al-Asad R; Department of Otolaryngology, Harvard Medical School, Boston, Massachusetts, USA.; Eaton-Peabody Laboratory, Massachusetts Eye and Ear, Boston, Massachusetts, USA., Zhang A; Department of Otolaryngology, Harvard Medical School, Boston, Massachusetts, USA.; Eaton-Peabody Laboratory, Massachusetts Eye and Ear, Boston, Massachusetts, USA., Edge ASB; Department of Otolaryngology, Harvard Medical School, Boston, Massachusetts, USA.; Eaton-Peabody Laboratory, Massachusetts Eye and Ear, Boston, Massachusetts, USA.; Program in Speech and Hearing Bioscience and Technology, Harvard Medical School, Boston, Massachusetts, USA.; Harvard Stem Cell Institute, Cambridge, Massachusetts, USA.
Jazyk: angličtina
Zdroj: Stem cells (Dayton, Ohio) [Stem Cells] 2020 Jul; Vol. 38 (7), pp. 890-903. Date of Electronic Publication: 2020 Apr 30.
DOI: 10.1002/stem.3181
Abstrakt: Sensorineural hearing loss is irreversible and can be caused by loss of auditory neurons. Regeneration of neural cells from endogenous cells may offer a future tool to restore the auditory circuit and to enhance the performance of implantable hearing devices. Neurons and glial cells in the peripheral nervous system are closely related and originate from a common progenitor. Prior work in our lab indicated that in the early postnatal mouse inner ear, proteolipid protein 1 (Plp1) expressing glial cells could act as progenitor cells for neurons in vitro. Here, we used a transgenic mouse model to transiently overexpress Lin28, a neural stem cell regulator, in Plp1-positive glial cells. Lin28 promoted proliferation and conversion of auditory glial cells into neurons in vitro. To study the effects of Lin28 on endogenous glial cells after loss of auditory neurons in vivo, we produced a model of auditory neuropathy by selectively damaging auditory neurons with ouabain. After neural damage was confirmed by the auditory brainstem response, we briefly upregulated the Lin28 in Plp1-expressing inner ear glial cells. One month later, we analyzed the cochlea for neural marker expression by quantitative RT-PCR and immunohistochemistry. We found that transient Lin28 overexpression in Plp1-expressing glial cells induced expression of neural stem cell markers and subsequent conversion into neurons. This suggests the potential for inner ear glia to be converted into neurons as a regeneration therapy for neural replacement in auditory neuropathy.
(©AlphaMed Press 2020.)
Databáze: MEDLINE
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