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Differential growth inhibitory effects of highly oxygenated guaianolides isolated from the Middle Eastern indigenous plant Achillea falcata in HCT-116 colorectal cancer cells.

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Medicinal plants play a crucial role in traditional medicine and in the maintenance of human health worldwide. Sesquiterpene lactones represent an interesting group of plant-derived compounds that are currently being tested as lead drugs in cancer clinical trials. Achillea falcata is a medicinal

The isolation and structural elucidation of euparotin acetate, a novel guaianolide tumor inhibitor from Eupatorium rotundifolium.

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Anti-proliferative activity of aguerin B and a new rare nor-guaianolide lactone isolated from the aerial parts of Centaurea deflexa.

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The phytochemical investigation of the aerial parts of Centaurea deflexa led to the identification of 21 compounds, among which three phenolic acids, one sterol, ten flavonoids, one phenylpropanoid derivative, two lignans and four sesquiterpene lactones. One of the latter compounds was a new, rare

New cytotoxic 6,7-cis and 6,7-trans configured guaianolides from Warionia saharae.

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Using cytotoxicity against the KB cancer cell line (ATCC CCL17) as a lead, bioactivity-guided fractionation of the MeOH-soluble part of the DCM extract of Warionia saharae leaves led to the isolation of six new cytotoxic guaianolide type sesquiterpene lactones (1-6). Besides two guaianolides showing

Bioactive guaianolides from siyekucai (Ixeris chinensis).

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Two new guaianolides, named chinensiolides D (5) and E (6), were isolated from Ixeris chinensis Nakai, and their structures were determined to be 10alpha-hydroxy-3-oxoguaia-11(13)-eno-12,6alpha-lactone (5) and

Guaianolides and a seco-Eudesmane from the Resinous Exudates of Cushion Bush (Leucophyta brownii) and Evaluation of Their Cytostatic and Anti-inflammatory Activity.

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A detailed phytochemical investigation of a dichloromethane extract of the resinous exudates of the cushion bush plant (Leucophyta brownii) resulted in the isolation of the new 8,12-guaianolides leucophytalins A (5) and B (6), the new 1,10-seco-eudesmane leucophytalin C (10), six rare

A new cytotoxic guaianolide from Chrysanthemum boreale.

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A new cytotoxic guaianolide was isolated from Chrysanthemum boreale Makino. The structure of guaianolide was elucidated as 8-acetoxy-4,10-dihydroxy-2,11(13)-guaiadiene-12,6-olide (1). Compound 1 exhibited cytotoxic activity (IC(50)< or =4 microg/ml) against all five human cancer cell lines tested.

Artemisianins A-D, new stereoisomers of seco-guaianolide involved heterodimeric [4+2] adducts from Artemisia argyi induce apoptosis via enhancement of endoplasmic reticulum stress.

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Artemisianins A-D (1-4), four stereoisomers of sesquiterpenoid dimers, forming via [4+2] cycloaddition from a 1, 10-seco-guaianolide dienophile and a guaianolide diene, along with two biosynthetically related precurors 5 and 6, were isolated from the famous traditional Chinese medicine Artemisia

Dimeric guaianolides and sesquiterpenoids from Artemisia anomala.

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A new dimeric guaianolide (8) and a new glaucolide (3), a seco-guaiaretic acid (4), two guaianolides (6 and 7), and five known sesquiterpene lactones (1, 2, 5, 9, and 10) were isolated from the aerial part of Artemisia anomala. Their structures were determined on the basis of chemical and

[Guaianolides from aerial parts of Artemisia myriantha].

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This study was performed to investigate the guaianolides from the aerial parts of Artemisia myriantha. The chemical constituents were isolated by chromatographic columns over silica gel, Sephadex LH-20, and ODS, as well as Semi-prep HPLC methods, and their structures were identified by NMR and MS

Ainsliatriolides A and B, Two Guaianolide Trimers from Ainsliaea fragrans and Their Cytotoxic Activities.

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Ainsliatriolides A (1) and B (2), two guaianolide sesquiterpenoid trimers possessing an unprecedented skeleton, were isolated from Ainsliaea fragrans. Their structures were elucidated through extensive analysis of spectroscopic data and confirmed by single-crystal X-ray diffraction experiment.

Cytotoxic guaianolide from Anthemis segetalis (Asteraceae).

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Two epimeric guaianolides were isolated from the aerial parts of Anthemis segetalis. These compounds have not been detected in any Anthemis species so far. One of them was tested for cytotoxicity against human cervical cancer (HeLa) and murine melanoma (B16) cell lines showing appreciable activity.

Cytotoxic activity of some natural and synthetic guaianolides.

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Several natural guaianolides and synthetic derivatives of repin (1) were tested and found to be active against tumor cell replication. Repin (1) and both mono- and di-halohydrin analogues (2, 7-9, 11, 12) showed significant antitumor potency. A more effective compound (17) was obtained by

Antiproliferative activity of Artemisia asiatica extract and its constituents on human tumor cell lines.

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The extract of Artemisia asiatica herb with antiproliferative activity against four human tumor cell lines (A2780, A431, HeLa, and MCF7) was analyzed by the MTT assay, and bioassay-directed fractionation was carried out in order to identify the compounds responsible for the cytotoxic activity.

Micheliolide inhibits gastric cancer growth in vitro and in vivovia blockade of the IL-6/STAT3 pathway.

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Upregulation of pro-inflammatory cytokine interleukin (IL)-6 is observed in gastric cancer tissue, and high IL-6 serum levels predict a poor prognosis of gastric cancer patients. The IL-6/STAT3 pathway has been confirmed to play essential roles in the process of carcinogenesis, including gastric

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