¹Department of Pharmacology, Faculty of ASPM's KT Patil College of Pharmacy, Siddharth Nagar, Osmanabad- 413 501, Maharashtra, India
²Department of Pharmaceutics, Faculty of JSPM’s Charak College of Pharmacy and Research, Wagholi-412207, Pune, Maharashtra, India
³Department of Pharmacognosy, Faculty of ASPM's KT Patil College of Pharmacy, Siddharth Nagar, Osmanabad- 413 501, Maharashtra, India DOI : 10.29228/jrp.2022.00 Hinokitiol is a natural bioactive compound synthesized as a secondary metabolite in numerous aromatic, medicinal plants and commonly used in food and cosmetic industries. The investigation was carried out to screen the potential activity of hinokitiol against LPS-induced inflammation, algesia, and oxidative stress in experimental animals. The hinokitiol was screened in two doses, i.e. 0.2 mg/kg (H-1), 0.4 mg/kg (H-2), and inflammoalgesia were induced by intraplantar administration of lipopolysaccharides (LPS) at a dose of 1 mg/kg. The assessment was carried out on the 7th, 14th, 21st, and 28th days for the severity of arthritic hyperalgesia score, secondary inflammatory lesions, stair climbing ability, motility, and dorsal flexion-pain score test. Serum analysis was carried out for tumor necrosis factor-alpha (TNF- α), interleukin (IL-2 and IL-6), prostaglandin (PGE-2), nitric oxide (NO), and thymus/spleen index. The joint samples were further subjected to histopathological observations. The results showed that treatment with H-1 and H-2 shows dose-dependent significant decreases (P<0.05) in arthritic hyperalgesia and secondary lesions, whereas a significant increase (P<0.05) in stair climbing ability, motility, and dorsal flexion pain score test was noted. Treatment with H-1 and H-2 shows significant lowering (P<0.05) in serum TNF-α, IL-2, IL-6, PGE-2, NO, and thymus/spleen index. Histopathological observations indicated minimal damage and restored the synovial structure. The present study reveals that hinokitiol shows significant anti-inflammatory, anti-algesic, and antioxidant effects against LPS-induced inflammation in experimental animals. Keywords : Hinokitiol; Lipopolysaccharide; Arthritis; Inflammation; Hyperalgesia; Inflammatory mediators