Note to users. If you're seeing this message, it means that your browser cannot find this page's style/presentation instructions -- or possibly that you are using a browser that does not support current Web standards. Find out more about why this message is appearing, and what you can do to make your experience of our site the best it can be.


Sci. Signal., 23 February 2010
Vol. 3, Issue 110, p. pe6
[DOI: 10.1126/scisignal.3110pe6]


A New Role for RPTP{sigma} in Spinal Cord Injury: Signaling Chondroitin Sulfate Proteoglycan Inhibition

Yuntao Duan and Roman J. Giger*

Department of Cell and Developmental Biology and Department of Neurology, University of Michigan School of Medicine, Ann Arbor, MI 48109, USA.

Abstract: It has been known for more than two decades that chondroitin sulfate proteoglycans (CSPGs) inhibit axonal growth and regeneration. In the adult nervous system, CSPGs are enriched in perineuronal nets, and their abundance is increased in reactive astrocytes following injury to brain or spinal cord. Degradation of chondroitin sulfate (CS) sugar moieties by the local infusion of the bacterial enzyme chondroitinase ABC (ChaseABC) enhances experience-dependent neuronal plasticity in the adult visual cortex and results in substantially improved behavioral outcomes after spinal cord injury (SCI). Although the positive effects of ChaseABC treatment on neuronal plasticity have been known for some time, the underlying mechanisms remained enigmatic. The receptor protein tyrosine phosphatase sigma (RPTP{sigma}) has now been identified as a receptor for inhibitory CSPGs. Similarly to ChaseABC treatment, functional ablation of Ptprs, the gene encoding RPTP{sigma}, promotes neurite outgrowth in the presence of CSPGs in vitro and enhances axonal growth into CSPG-rich scar tissue following SCI in vivo. The discovery of neuronal RPTP{sigma} as a receptor for inhibitory CSPGs not only provides important mechanistic clues about CSPG function, but also identifies a potential new target for enhancing axonal growth and plasticity after nervous system injury.

* Corresponding author. E-mail, rgiger{at}

Citation: Y. Duan, R. J. Giger, A New Role for RPTP{sigma} in Spinal Cord Injury: Signaling Chondroitin Sulfate Proteoglycan Inhibition. Sci. Signal. 3, pe6 (2010).

Read the Full Text

Proteoglycan-Specific Molecular Switch for RPTP{sigma} Clustering and Neuronal Extension.
C. H. Coles, Y. Shen, A. P. Tenney, C. Siebold, G. C. Sutton, W. Lu, J. T. Gallagher, E. Y. Jones, J. G. Flanagan, and A. R. Aricescu (2011)
Science 332, 484-488
   Abstract »    Full Text »    PDF »

To Advertise     Find Products

Science Signaling. ISSN 1937-9145 (online), 1945-0877 (print). Pre-2008: Science's STKE. ISSN 1525-8882