Andrographolide relieved pathological pain generated by spared nerve injury model in mice. (1st January 2018)

• Record Type: Journal Article
• Authors: Wang, Huang-Chi; Tsay, Hsin-Sheng; Shih, Hui-Nung; Chen, Yi-An; Chang, Kai-Ming; Agrawal, Dinesh Chandra; Huang, Siendong; Lin, Yi-Lo; Lee, Meng-Jen
• Is Part Of: Pharmaceutical biology. Volume 56:Number 1(2018)
• Page Start: 124
• Page End: 131
• Publication Date: 2018-01-01
• Subjects: Allodynia -- Andrographis paniculata -- astrocytes -- IL-1 -- von Frey test; Pharmacognosy -- Periodicals; Materia medica, Vegetable -- Periodicals; 615.321
• DOI: 10.1080/13880209.2018.1426614
• Languages: English
• ISSNs: 1388-0209

Abstract

Abstract: Context: Andrographolide (Andro), found in large quantities in Andrographis paniculata Nees (Acanthaceae), is anti-inflammatory, especially in the central nervous system (CNS) glia. Objective: The objective of this study is to test Andro's ability to reduce allodynia in a spared nerve injury model. Material and methods: Male 30 g BalbC mice were divided into four groups: (1) Sham-operated control (Sham-group); (2) nerve injured and treated with saline (Saline-group); (3) nerve injured and treated with Andro (Andro-group); (4) nerve injured and treated with non-steroidal anti-inflammatory drugs (NSAIDS) (NSAIDS-group). Andro or NSAIDS (diclofenac salt) were injected intraperitoneally at 5 mg/kg body weight daily. Mechanical allodynia was assessed by von Frey tests at 3, 7, and 14 d. For immunohistochemical analysis, samples were collected at 7 d. Results: The threshold for inducing allodynia increased and the response percentage reduced in the Andro-group when compared with the Saline-group, as well as when compared with NSAIDS groups throughout 3–14 d. The ratio of threshold for OP-Andro/OP-saline and for OP-Andro/OP-NSAIDS groups was 20.42 and 11.67 at 14 d, respectively. The ratio of response percentage for OP-Andro/OP-saline and for OP-Andro/OP-NSAIDS was 0.32 and 0.39 at 14 d, respectively. Interleukin-1 (IL-1) immunostaining in the spinal cord was reduced in the Andro-group. Astrocytic activities were not significantly reduced in the Andro-group compared with the Saline-group at 7 d post-operation (PO) Conclusions: Andro reduced mechanical allodynia more than NSAIDS at the same concentration, and the observed behaviour was associated with a reduction in inflammatory cytokine produced in the spinal cord.