micheliolide and parthenolide

Applied science nowadays works on the isolation and application of biological macromolecules (BMM). These BMM are isolates from plants using different techniques and used as anticancer, antimicrobial, and anti-inflammatory drugs. Parthenolide (PLT) is one of the most important biological macromolecules and a naturally occurring sesquiterpene lactone that is isolated from a plant species

Topics: Anti-Inflammatory Agents; Humans; Lactones; Neoplasms; Sesquiterpenes; Sesquiterpenes, Guaiane

Natural products are important leads in drug discovery. In recent years, the anti-leukemic properties of natural compounds isolated from plants, containing an α-Methylene-γ-lactones skeleton, have attracted a lot of attention. Extensive research has been carried out to characterize their molecular mechanisms of action and potential chemotherapeutic application in different types of cancer, including leukemias. Sesquiterpene lactones, a group of α-Methylene-γ-lactones are plant-derived compounds, mostly of the Compositae family, used in traditional medicine especially for the treatment of inflammation. However, they exhibit a broad spectrum of other biological effects, including cytotoxic, anti-bacterial, anti-helminthic, and anti-tumor activity. Recently, a sesquiterpene lactone, parthenolide, and several other compounds containing an α-methylene-γ-lactone skeleton have become topics of interest as potential antileukemic agents. The recent research emphasizes their selective activity against leukemia cells while the normal hematopoietic cells remain unaffected. In this review, we give a brief description of natural α-Methylene-γ-lactones isolated from plants and their derivates with minor chemical modifications that possess anti-leukemic activity. We also discuss molecular mechanisms of action of these compounds, in particular, their selectivity against leukemia cells.

Topics: Animals; Antineoplastic Agents; Humans; Lactones; Leukemia; Neoplastic Stem Cells; Plant Extracts; Sesquiterpenes; Sesquiterpenes, Guaiane

Parthenolide and micheliolide have attracted great attention in anticancer research due to their unique activities. In this study, thirteen parthenolide derivatives and twenty-three micheliolide derivatives were synthesized. Most synthesized compounds showed higher cytotoxicity than parthenolide or micheliolide. The in vivo anticancer activity of several representative compounds was evaluated in mice. One micheliolide derivative, 9-oxomicheliolide (43), showed promising in vivo antitumor activity compared with clinical drugs cyclophosphamide or temozolomide. Compound 43 was particularly effective against glioblastoma, with its tumor inhibition rate in mice comparable to the drug temozolomide. The discovery of compound 43 also demonstrates the feasibility of developing anticancer micheliolide derivatives by modification at C-9 position. Anticancer mechanism studies revealed that 9-oxomicheliolide exhibited inhibition effect against NF-κB and STAT3 signaling pathways, as well as induction effects of cell apoptosis. It is postulated that 9-oxomicheliolide is likely to be a modulator of the immune system, which regulates the anticancer immune responses.

Topics: Animals; Antineoplastic Agents; Cell Proliferation; Dose-Response Relationship, Drug; Drug Design; Drug Screening Assays, Antitumor; Humans; Male; Mice; Mice, Inbred Strains; Molecular Structure; Neoplasms, Experimental; NF-kappa B; Sesquiterpenes; Sesquiterpenes, Guaiane; STAT3 Transcription Factor; Structure-Activity Relationship; Tumor Cells, Cultured

Parthenolide (PTL) can target NLRP3 inflammasome to treat inflammation and its related disease, but its cytotoxicity limits further development as an anti-inflammatory drug. A series of PTL analogs and their Michael-type adducts were designed and synthesized, and most of them showed high activities against the NLRP3 inflammasome pathway. The most potent compound 8b inhibited the release of IL-1β with IC

Topics: Animals; Anti-Inflammatory Agents; Cell Survival; Cells, Cultured; Drug Design; Humans; Inflammasomes; Interleukin-1beta; Lipopolysaccharides; Mice; Neuroglia; NLR Family, Pyrin Domain-Containing 3 Protein; Sesquiterpenes; Signal Transduction

Parthenolide (PTL) and micheliolide (MCL) are sesquiterpene lactones with similar structures, and both of them have been reported to exhibit multiple biochemical and pharmacological activities. This study aims to investigate the inhibition of these two compounds on the activity of UDP-glucuronosyltransferases (UGTs).

Topics: Enzyme Inhibitors; Glucuronosyltransferase; Humans; Kinetics; Sesquiterpenes; Sesquiterpenes, Guaiane

An investigation of BF3-mediated rearrangements of parthenolide [1] provided micheliolide [5] as a major product. Minor reaction products included 10 (14)-dehydro-5 alpha-hydroxy-trans-guaianolide [2], 9,10-dehydro-5 alpha-hydroxy-trans-guaianolide [3], the xanthanolide 2-desoxy-6-epi-parthemollin [4], 1,2-dehydro-4 alpha-hydroxyguaianolide [6], 11,13-dehydrocompressanolide [7], and bicyclo[6.2.0]dec-10(14)-en-12,6-olide [8]. Their mechanisms of formation were interpreted as rearrangements involving carbocation intermediates.

Topics: Cyclization; Magnetic Resonance Spectroscopy; Sesquiterpenes; Sesquiterpenes, Guaiane; Structure-Activity Relationship