Electro-acupuncture treatment improves neurological function associated with downregulation of PDGF and inhibition of astrogliosis in rats with spinal cord transection.

The aim of the current study was to determine the effects of electro-acupuncture (EA) on the improvement of locomotor function in injured spinal cord and underlying mechanism. Forty-five female Sprague-Dawley rats (180~200 g) were randomly divided into three groups, sham operation control group (sham), spinal cord transection group (SCT) and EA group. The Basso, Beattie, and Bresnahan (BBB) Locomotor Rating Scale was used to evaluate functional recovery of rats in hindlimbs at 1, 3, 5 weeks after injury and EA therapy. The gene and protein expression of glial fibrillary acidic protein (GFAP) and platelet derived growth factor (PDGF) were measured by reverse transcription-polymerase chain reaction and Western blot analysis, respectively, and the number of GFAP-positive cells was counted, also. Compared with SCT group, the locomotor function in hindlimbs of rats was improved after 1, 3, 5 weeks following EA therapy. EA treatment not only decreased effectively the number of GFAP immunostaining and GFAP expression, but also downregulated the PDGF expression both gene and protein, in addition decreased the number of PDGF immunostaining in injured spinal cord of rats with transection. It therefore concluded that EA therapy can significantly promote the recovery of locomotor function, and this may be linked to the inhibition of astrogliosis, together with the downregulation of PDGF.