GM-CSF reduces expression of chondroitin sulfate proteoglycan (CSPG) core proteins in TGF-β-treated primary astrocytes

  • Choi, Jung-Kyoung ;
  • Park, Sang-Yoon ;
  • Kim, Kil Hwan ;
  • Park, So Ra ;
  • Lee, Seok-Geun ;
  • Choi, Byung Hyune
  • Received : 2014.01.20
  • Accepted : 2014.02.10
  • Published : 2014.12.31


GM-CSF plays a role in the nervous system, particularly in cases of injury. A therapeutic effect of GM-CSF has been reported in rat models of various central nervous system injuries. We previously showed that GM-CSF could enhance long-term recovery in a rat spinal cord injury model, inhibiting glial scar formation and increasing the integrity of axonal structure. Here, we investigated molecular the mechanism(s) by which GM-CSF suppressed glial scar formation in an in vitro system using primary astrocytes treated with TGF-${\beta}$. GM-CSF repressed the expression of chondroitin sulfate proteoglycan (CSPG) core proteins in astrocytes treated with TGF-${\beta}$. GM-CSF also inhibited the TGF-${\beta}$-induced Rho-ROCK pathway, which is important in CSPG expression. Finally, the inhibitory effect of GM-CSF was blocked by a JAK inhibitor. These results may provide the basis for GM-CSF's effects in glial scar inhibition and ultimately for its therapeutic effect on neural cell injuries.


CSPG core proteins;Glial scar;GM-CSF;Primary astrocytes;TGF-${\beta}$


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Supported by : National Research Foundation of Korea