Diverse isoquinolines with anti-inflammatory and analgesic bioactivities from Hypecoum erectum
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE: Hypecoum erectum has been used extensively in folk medicine to treat inflammation, fever, and pain. However, few investigations have been carried out on the biological activities related to its traditional use. The chemical constituents of this plant along with their anti-inflammatory and analgesic effects have yet to be revealed.
AIM OF THE STUDY: This study aimed to support the traditional use of H. erectum by first assessing its anti-inflammatory and analgesic effects and then investigating its chemical constituents to identify any anti-inflammatory and/or analgesic compounds.
MATERIAL AND METHODS: The in vivo anti-inflammatory and analgesic activities of the MeOH extract (ME), total alkaloid (AL), and non-alkaloid (Non-AL) fractions of H. erectum at doses of 200, 100, and 50 mg/kg and four major constituents (20, 21, 22, and 27) at doses of 100 and 50 mg/kg delivered via intragastrical administration were evaluated using carrageenan-induced paw edema and acetic acid-stimulated writhing animal models. A phytochemical study of the bioactive (AL) fraction was conducted using various chromatographic techniques, and the structures of the obtained isoquinolines were identified by multiple spectroscopic analyses and quantum chemical computations. Moreover, the anti-inflammatory activities of all the isolates were assessed in vitro based on the suppression of lipopolysaccharide-activated inflammatory mediators (COX-2, IL-1β, and TNF-α) in RAW…
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