title: Bog bilberry anthocyanin extract improves motor functional recovery by multifaceted effects in spinal cord injury.
abstract: The aim of this study was to determine the therapeutic efficiency of bog bilberry anthocyanin extract (BBAE) treatment starting 1 d after spinal cord injury (SCI) in rats and to investigate the underlying mechanism. The BBAE contained cyanidin-3-glucoside, malvidin-3-galactoside and malvidin-3-glucoside. SCI models were induced using the weight-drop method in Sprague-Dawley rats and additionally with sham group (laminectomy only). The animals were divided into four groups: vehicle-treated group; 10 mg/kg BBAE-treated group; 20 mg/kg BBAE-treated group; sham group. BBAE-treated or vehicle-treated group was administered orally at one day after SCI and then daily for 8 weeks. Locomotor functional recovery was assessed during the 8 weeks post operation period by performing a Basso, Beattie, and Bresnahan (BBB) locomotor score test. At the end of study, the animals were killed, and 1.5 cm segments of spinal cord encompassing the injury site were removed for immunohistochemistry, histopathological and western blotting analysis. Immunohistochemistry for GFAP, aggrecan, neurocan and NeuN was used to assess the degree of astrocytic glial scar formation and neuron survival. Immunohistochemistry and western blotting analysis for TNF-α, IL-6, IL-1β was used to evaluate the anti-inflammation effect of BBAE. To evaluate its inhibition effect on the astrocytes, we performed the MTT assay and immunohistochemistry for Ki67 in vitro. Results show that the BBAE-treated animals showed significantly better locomotor functional recovery, neuron death and smaller glial scar formation after spinal cord injury in vivo. In addition, BBAE administration could inhibit astrocyte proliferation in vivo and vitro. Therefore, BBAE may be useful as a promising therapeutic agent for SCI.
authors.affiliation: Department of Orthopedics, Peking University Third Hospital, 49 North Garden Rd, Haidian, Beijing 100191, People's Republic of China. pkuwj2010@sina.cn
authors.forename: Jun
authors.initials: J
authors.lastname: Wang
authors.forename: Chuan
authors.initials: C
authors.lastname: Ma
authors.forename: Wei
authors.initials: W
authors.lastname: Rong
authors.forename: Hao
authors.initials: H
authors.lastname: Jing
authors.forename: Xing
authors.initials: X
authors.lastname: Hu
authors.forename: Xiaoguang
authors.initials: X
authors.lastname: Liu
authors.forename: Liang
authors.initials: L
authors.lastname: Jiang
authors.forename: Feng
authors.initials: F
authors.lastname: Wei
authors.forename: Zhongjun
authors.initials: Z
authors.lastname: Liu
mesh_terms: D000818:Animals; D000872:Anthocyanins / Q000494:pharmacology*; D001253:Astrocytes / Q000187:drug effects; D001369:Axons; D015153:Blotting, Western; D049109:Cell Proliferation / Q000187:drug effects; D002478:Cells, Cultured; D008279:Magnetic Resonance Imaging; D009043:Motor Activity / Q000187:drug effects*; D009186:Myelin Sheath / Q000378:metabolism; D010936:Plant Extracts / Q000494:pharmacology*; D051381:Rats; D017207:Rats, Sprague-Dawley; D013119:Spinal Cord Injuries / Q000503:physiopathology*; D029800:Vaccinium myrtillus / Q000737:chemistry*
chemical_list: D000872:Anthocyanins; D010936:Plant Extracts