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Mohawk promotes the maintenance and regeneration of the outer annulus fibrosus of intervertebral discs
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Mohawk promotes the maintenance and regeneration of the outer annulus fibrosus of intervertebral discs
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Journal Article
Mohawk promotes the maintenance and regeneration of the outer annulus fibrosus of intervertebral discs
2016
Overview
The main pathogenesis of intervertebral disc (IVD) herniation involves disruption of the annulus fibrosus (AF) caused by ageing or excessive mechanical stress and the resulting prolapse of the nucleus pulposus. Owing to the avascular nature of the IVD and lack of understanding the mechanisms that maintain the IVD, current therapies do not lead to tissue regeneration. Here we show that homeobox protein Mohawk (Mkx) is a key transcription factor that regulates AF development, maintenance and regeneration. Mkx is mainly expressed in the outer AF (OAF) of humans and mice. In
Mkx
−/−
mice, the OAF displays a deficiency of multiple tendon/ligament-related genes, a smaller OAF collagen fibril diameter and a more rapid progression of IVD degeneration compared with the wild type. Mesenchymal stem cells overexpressing Mkx promote functional AF regeneration in a mouse AF defect model, with abundant collagen fibril formation. Our results indicate a therapeutic strategy for AF regeneration.
Homeobox protein Mohwak (Mkx) is involved in tendon and ligament development. Here the authors show that Mkx in the outer annulus fibrosus of the intervertebral disc plays a role in maintenance of the IVD, showing that stem cells overexpressing Mkx enhance therapeutic IVD regeneration in mice.
Publisher
Nature Publishing Group UK,Nature Publishing Group,Nature Portfolio
