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The soft mechanical signature of glial scars in the central nervous system
Open accessAbstract
Injury to the central nervous system (CNS) alters the molecular and cellular composition of neural tissue and leads to glial scarring, which inhibits the regrowth of damaged axons. Mammalian glial scars supposedly form a chemical and mechanical barrier to neuronal regeneration. While tremendous effort has been devoted to identifying molecular characteristics of the scar, very little is known about its mechanical properties. Here we characterize spatiotemporal changes of the elastic stiffness of the injured rat neocortex and spinal cord at 1.5 and three weeks post-injury using atomic force microscopy. In contrast to scars in other mammalian tissues, CNS tissue significantly softens after injury. Expression levels of glial intermediate filaments (GFAP, vimentin) and extracellular matrix components (laminin, collagen IV) correlate with tissue softening. As tissue stiffness is a regulator of neuronal growth, our results may help to understand why mammalian neurons do not regenerate after injury.
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Self-citation
Metadata
- Authors
- Moeendarbary, E., Weber, I. P., Sheridan, G. K., Koser, D. E., Soleman, S., Haenzi, B., Bradbury, E. J., Fawcett, J., & Franze, K.
- Venue
- Nature Communications
- Published
- 2017-03-20
- Volume
- 8
- Issue
- 1
- Pages
- 14787-14787
- ISSN
- 2041-1723 (ISSN-L)
- OpenAlex
- W2602609341
- Cited by
- 406
- References
- 61
- FWCI
- 19.40
- Type
- journal article
- Language
- en
- Open access
- gold
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