Abstract

Introduction: Cassia fistula has anti-inflammatory activity. Rheumatoid arthritis (RA) is an autoimmune disease, causing inflammation and disability of the affected joints. It is mostly treated symptomatically with NSAIDs, which themselves have a lot of adverse effects. In this study the anti-arthritic effect of Cassia fistula versus naproxen has been observed radiologically. Aims & Objectives: The present study was radiological analysis of anti-arthritic effect of Cassia fistula compared to naproxen in Complete Freund’s Adjuvant (CFA) induced rat model of rheumatoid arthritis. Place and duration of study: This study was conducted at the Animal House of University of Veterinary and Animal Sciences, Lahore for a period of three months. Material & Methods: The study was carried out on 96 male rats divided into 12 groups of 8 rats each. Single 0.2ml dose of Complete Freund’s Adjuvant (CFA) was injected in the right hind paw of each rat in all groups except Group 1 (negative control). Group 2 was positive control. The prophylactic (3-7) and therapeutic (8- 12) groups were given naproxen (25mg/kg), anthraquinone extract (250 &500mg/kg) or methanolic extract (250 & 500mg/kg) of Cassia fistula orally BD on days 1,2 &3 (first dose preceding CFA injection by 30 minutes) and on days 9,10 &11 for therapeutic groups respectively. On day 15, x-rays of right ankle joints of all groups were taken as a confirmatory investigation on the final status of the arthritis. Results: Our results showed both anthraquinone and methanolic extracts of Cassia fistula have dose dependent (500˃250mg/dl) prophylactic and therapeutic anti-arthritic potential albeit lesser than naproxen 25mg/kg, to reduce the swelling of hind paw and deformity of interphalangeal joints on radiological examination. Conclusion: The efficacy of Cassia fistula makes it a potential weaker candidate to naproxen in prevention and treatment of rheumatoid arthritis.

Highlights

  • Cassia fistula known as Golden shower and Amaltas, has great variety of uses ranging from constipation to glandular tumors in traditional medicine.[1,2,3]

  • 9% Concentrated Extract was produced in Rotary evaporator and refrigerated till further use Confirmatory Test for Anthraquinones: Cassia fistula bark and fruit pulp extract was boiled for 5 minutes after addition of 10ml of 1% HCl

  • Preparation of rat model of rheumatoid arthritis: To induce arthritis a single 0.2ml dose of Complete Freund’s Adjuvant (CFA) was injected in the right hind paw of each rat on Day 1.15 A gradual increase in the swelling around injection site was noticed within few hours

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Summary

Introduction

Results: Our results showed both anthraquinone and methanolic extracts of Cassia fistula have dose dependent (500˃250mg/dl) prophylactic and therapeutic anti-arthritic potential albeit lesser than naproxen 25mg/kg, to reduce the swelling of hind paw and deformity of interphalangeal joints on radiological examination. NSAIDs are the most commonly prescribed drugs to subside pain and swelling throughout the world.[1] Naproxen (NSAID) inhibits tissue cyclo-oxygenase and decreases pro-inflammatory prostaglandins, the important mediators of pain and inflammation.[8,9] alleviates symptoms of rheumatoid arthritis but has some adverse effects.[10,11] Fruit pulp of Cassia fistula has been used traditionally in many herbal medicines and shown to possess antiinflammatory activity.[12] Our previous experiments showed reduction in RA factor levels and ankle caliper measurement with Cassia fistula given prophylactically and Radiological Analysis of Hind Paw Joint in Murine Rheumatoid Arthritis Model Treated Prophylactically

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