Abstract
The anti-inflammatory activity of two extracts from the aerial parts of Ledum palustre has been reported. The volatile oil was obtained by supercritical fluid extraction (SFE) and the essential oil by hydrodistillation (HD). The oils were analysed by gas chromatography–mass spectrometry to monitor their composition. Both extracts shared as main compound (41.0–43.4%) ledol (23.3–26.7%) and ascaridole (15.1–4.5%). The anti-inflammatory activity was evaluated by the subcutaneous carrageenan injection-induced hind paw oedema. The treated animals received essential oil (SFE and HD), the reference group received ketoprofen or piroxicam and the control group received NaCl 0.9%. A statistical analysis was performed by the Student t-test. The results show that L. palustre essential oil enhanced a significant inhibition of oedema (50–73%) for HD oil and (52–80%) for SFE oil. These results were similar to those obtained with piroxicam (70%) and ketoprofen (55%).
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