methyl-maslinate and uvaol

methyl-maslinate has been researched along with uvaol* in 2 studies

Other Studies

2 other study(ies) available for methyl-maslinate and uvaol

ArticleYear
Bioactive triterpenoids from the leaves of Eriobotrya japonica as the natural PDE4 inhibitors.
    Natural product research, 2017, Volume: 31, Issue:24

    The ethanolic extract of the leaves of Eriobotrya japonica exhibited inhibitory activity against phosphodiesterase-4D (PDE4D), which is a therapeutic target of inflammatory disease. Subsequent bioassay-guided fractionation led to the isolation of a new triterpene (1), together with seven known triterpenoids, methyl corosolate (2), ursolic acid (3), oleanolic acid (4), methyl maslinate (5), α-amyin (6), 3β,19α,23-trihydroxy-urs-12-ene (7) and uvaol (8). The structure of compound 1 was established as 3β-hydroxyl-21β-acetoxyl-urs-12-en-28-carboxylate on the basis of interpretation of its 1D and 2D NMR and HR-ESI-MS spectroscopic data. The bioassay results verified compounds 2, 3 and 8 inhibited PDE4D2 effectively with the IC

    Topics: Animals; Anti-Inflammatory Agents; Eriobotrya; Humans; Inhibitory Concentration 50; Molecular Structure; Oleanolic Acid; Phosphodiesterase 4 Inhibitors; Plant Leaves; Triterpenes; Ursolic Acid

2017
Cardiotonic and antidysrhythmic effects of oleanolic and ursolic acids, methyl maslinate and uvaol.
    Phytomedicine : international journal of phytotherapy and phytopharmacology, 2004, Volume: 11, Issue:2-3

    The cardiotonic and antidysrhythmic effects of four triterpenoid derivatives, namely oleanolic acid (OA), ursolic acid (UA), and uvaol (UV), isolated from the leaves of African wild olive (Olea europaea, subsp. africana) as well as methyl maslinate (MM) isolated from the leaves of Olea europaea (Cape cultivar) were examined. The derivatives showed low toxicity on brine shrimp test. They displayed significant, dose-response vasodepressor effect and sinus bradicardia, most prominent for OA and MM. The derivatives acted as beta-adrenergic antagonists, blocking the effect of adrenaline and isoprenaline. The established positive inotropic and dromotropic effects were most distinctive for OA and MM. The antidysrhythmic effects were evaluated on CaCl2- and adrenaline-induced chemical arrhythmias, and on ischemia-reperfusion arrhythmia. OA and UA displayed antidysrhythmic effects on both types of chemical arrhythmia; OA and UV in dose 40 mg/kg conferred significant antidysrhythmic activity on ischemia and reperfusion arrhythmias. The effect was comparable to that of propranolol and suggestive of beta-adrenergic antagonistic activity. On the basis of the vasodepressor, cardiotonic and antidysrhythmic effects of these compounds, it was concluded that OA and UV isolated from wild African olive leaves, or crude extract containing all components, can provide a cheap and accessible source of additive to conventional treatment of hypertension, complicated by stenocardia and cardiac failure.

    Topics: Animals; Anti-Arrhythmia Agents; Arrhythmias, Cardiac; Artemia; Calcium Chloride; Cardiotonic Agents; Dose-Response Relationship, Drug; Epinephrine; Male; Olea; Oleanolic Acid; Phytotherapy; Plant Leaves; Rats; Rats, Wistar; Triterpenes; Ursolic Acid

2004