EVALUATION OF WOUND HEALING EFFECT OF EXTRACT AND FRACTIONS OF Newbouldia leavis ROOT BARK IN 5-FLOUROURACIL IMMUNOCOMPROMISED RATS Authors: Ugochi O. Njoku and Martins O. Ogugofor
ABSTRACT
Chronic wound is one of the major health challenges affecting a great number of people
especially individuals with compromised immune system. There is a need to develop an
effective drug that would facilitate rapid wound healing in such individuals.To investigate the
wound healing properties of extract and fractions of Newbouldia leavis extract in
immunocompromsed albino rats.This study assessed the wound healing activity of
Chloroform extract, n-hexane (NLHF) and ethylacetate (NLEAF) fractions of Newbouldia
leavis root bark in 5-fluorouracil-induced immunocompromised rats. 5-flourouracil (30
mg/kg) was used to induce immunosuppression. The extract, fractions and reference drug
were topically applied for 15 days. The wound healing activity was studied using the excision
wound modelSignificant (p<0.05) increases in rate of wound contraction, elevated levels of
hydroxyproline, hexosamine and hexuronic acid were observed in treated groups when
compared with the untreated groups of immunocompromised rats. The extract (40%)
significantly accelerated wound healing with the highest percentage of wound contraction of
98.68 at day 12 when compared with groups treated with silver sulphadiazene (95.48%), 40%
NLHF (77.04%), and 40% NLEAF (88.83%). The rats treated with NLEAF exerted greater
wound healing activity with significantly (p<0.05) increased rate of wound contraction,
hydroxyproline, hexosamine and hexuronic acid concentrations compared to the group that received NLHF.It could be stated that Newbouldia leavis extract and fractions significantly
promoted wound healing and were able to overcome the wound healing suppressing effect of
5-flourouracil.
Keywords: Wounds, immunocompromised, 5-flourouracil, Newbouldia leavis, Silver
sulphadiazene