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Link to original content: https://pubmed.ncbi.nlm.nih.gov/22414102
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Review
. 2012;19(14):2104-27.
doi: 10.2174/092986712800229005.

Anti-inflammatory iridoids of botanical origin

A Viljoen  1 , N Mncwangi, I Vermaak
Affiliations
Review

Anti-inflammatory iridoids of botanical origin

A Viljoen et al. Curr Med Chem. 2012.

Abstract

Inflammation is a manifestation of a wide range of disorders which include; arthritis, atherosclerosis, Alzheimer's disease, inflammatory bowel syndrome, physical injury and infection amongst many others. Common treatment modalities are usually nonsteroidal anti-inflammatory drugs (NSAIDs) such as aspirin, paracetamol, indomethacin and ibuprofen as well as corticosteroids such as prednisone. These however, may be associated with a host of side effects due to non-selectivity for cyclooxygenase (COX) enzymes involved in inflammation and those with selectivity may be highly priced. Thus, there is a continuing search for safe and effective antiinflammatory molecules from natural sources. Research has confirmed that iridoids exhibit promising anti-inflammatory activity which may be beneficial in the treatment of inflammation. Iridoids are secondary metabolites present in various plants, especially in species belonging to the Apocynaceae, Lamiaceae, Loganiaceae, Rubiaceae, Scrophulariaceae and Verbenaceae families. Many of these ethnobotanicals have an illustrious history of traditional use alluding to their use to treat inflammation. Although iridoids exhibit a wide range of pharmacological activities such as cardiovascular, hepatoprotection, hypoglycaemic, antimutagenic, antispasmodic, anti-tumour, antiviral, immunomodulation and purgative effects this review will acutely focus on their anti-inflammatory properties. The paper aims to present a summary for the most prominent iridoid-containing plants for which anti-inflammatory activity has been demonstrated in vitro and / or in vivo.

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Figures

Fig. (1)
Fig. (1)
Summary diagram of mediators derived from phospholipids and their physiological effects. HETE = hydroxyeicosatetraenoic acid; HPETE = hydroperoxyeicosatetranoic acid (adapted from Rang et al. [3]).
Fig. (2)
Fig. (2)
Chemical structures of selected isolated iridoid glycosides.
See this image and copyright information in PMC

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