NF-κB is involved in brain repair by stem cell factor and granulocyte-colony stimulating factor in chronic stroke.

NF-κB is involved in brain repair by stem cell factor and granulocyte-colony stimulating factor in chronic stroke.
Exp Neurol. 2014 Sep 30;
Authors: Cui L, Duchamp NS, Boston DJ, Ren X, Zhang X, Hu H, Zhao LR
Abstract
Chronic stroke is the phase of brain recovery and repair generally beginning 3 months after stroke onset. No pharmaceutical approach is currently available to enhance brain repair in the chronic stroke. We have previously determined the therapeutic effects of stem cell factor (SCF) and granulocyte-colony stimulating factor (G-CSF) alone or in combination (SCF+G-CSF) in an animal model of chronic stroke and demonstrated that only SCF+G-CSF induces long-term functional recovery. However, the mechanism underlying the SCF+G-CSF-induced brain repair in chronic stroke remains largely elusive. In the present study, we determined the role of nuclear factor-kappa B (NF-κB) in neurovascular network remodeling and motor function improvement by SCF+G-CSF treatment in chronic stroke. SCF+G-CSF was subcutaneously administered for 7 days beginning 17 weeks after induction of experimental stroke. To inhibit NF-κB activation, NF-κB inhibitor was infused into the brain before SCF+G-CSF treatment. We observed that NF-κB inhibitor abolished the SCF+G-CSF-induced axonal sprouting, synaptogenesis and angiogenesis in the ipsilesional somatosensorimotor cortex. In addition, blockage of NF-κB activation resulted in elimination of the SCF+...

Source: Experimental Neurology - September 30, 2014 Category: Neurology Authors: Cui L, Duchamp NS, Boston DJ, Ren X, Zhang X, Hu H, Zhao LR Tags: Exp Neurol Source Type: research