Theacrine, a purine alkaloid with anti-inflammatory and analgesic activities.
The anti-inflammatory and analgesic effects of theacrine (1, 3, 7, 9-tetramethyluric acid), a purine alkaloid which is abundantly present in Camellia kucha, were investigated. Xylene-induced ear edema, acetic acid-induced vascular permeability and lambda-carrageenan-induced paw edema were used to investigate anti-inflammatory activity, and acetic acid-induced writhing and hot-plate tests were used to determine analgesic effect. Oral administration of theacrine (8-32 mg/kg) induced dose-related anti-inflammatory and analgesic effects. On the other hand, oral caffeine administration (8-32 mg/kg) did not show an inhibitory effect on the inhibition of inflammatory response or cause analgesia. Additionally, the result of the acute toxicity test showed that the LD(50) of theacrine was 810.6 mg/kg (769.5-858.0mg/kg). The data obtained suggest theacrine possessed analgesic and anti-inflammatory activities.
School of Life Sciences, Sun Yat-sen University, Guangzhou, China.
Yuanyuan
Y
Wang
Xiaorong
X
Yang
Xinqiang
X
Zheng
Jing
J
Li
Chuangxing
C
Ye
Xiaohong
X
Song
D000700:Analgesics / Q000737:chemistry; D000818:Animals; D000893:Anti-Inflammatory Agents / Q000032:analysis; D028244:Camellia / Q000737:chemistry*; D004353:Drug Evaluation, Preclinical; D005260:Female; D007249:Inflammation / Q000188:drug therapy*; D008297:Male; D051379:Mice; D010146:Pain / Q000188:drug therapy*; D008517:Phytotherapy; D010936:Plant Extracts / Q000627:therapeutic use; D014527:Uric Acid / Q000031:analogs & derivatives* / Q000737:chemistry / Q000627:therapeutic use
D000700:Analgesics; D000893:Anti-Inflammatory Agents; D010936:Plant Extracts; D014527:Uric Acid; C077059:1,3,7,9-tetramethyluric acid