Anti-inflammatory Activity of Water Extract of Luvunga sarmentosa (BI.) Kurz Stem in the Animal Models

Abstract

The study was aimed to determine the anti-inflammatory activity of water extract of the Luvunga sarmentosa stem in an animal model. Twenty-five Wistar rats were divided into five groups (n=5). Group 1 was administered 0.9% normal saline (negative control), group 2 was administered 150 mg/kg diclofenac sodium (positive control), and groups 3 to 5 were administered 50, 300, and 550 mg/kg BW of L. sarmentosa extract, respectively. Carrageenan was injected subcutaneously into each rat's subplantar region of the left hind paw. The paw volume was measured using a plethysmometer. The results showed that the water extract of L. sarmentosa stem (doses of 50, 300, and 550 mg/kg BW) significantly reduced the paw edema volume from the 4^th to 5^th hour compared to the negative control. The percent inhibition of edema at the 5^th hour is 47.45; 46.95; 50.39%. The first phase of the edema (1^st and 2^nd hour) was not affected by the extract. Meanwhile, diclofenac sodium decreased paw edema volume from the 1^st to 5^th hour with a percent inhibition of 95.90% at the 5^th hour. The histopathology result is relevant to the percentage inhibition of edema. Treatment with L. sarmentosa extract showed slight improvement, destruction of epidermal tissue, hyperkeratotic skin, and subepidermal edema. Meanwhile, positive control showed no inflammatory signs with normal keratin, subepidermal, and subcutaneous layers. The water extract of L. sarmentosa stem has anti-inflammatory activity. This extract effectively reduces the paw edema volume in the late phase with decreased neutrophil infiltration.