Search

A new abietane diterpenoid, 1β, 11-epoxyabieta-12-hydroxy-8, 11, 13-triene-7-one (1), along with three known compounds (2–4), was isolated from Lycopodium complanatum. Their structures were confirmed by the analysis of 1D, 2D NMR and HRESIMS data, and comparison with previous spectral data. All compounds were tested for inhibitory activities against A549, HepG2 and MCF-7 tumor cell lines. [ABSTRACT FROM AUTHOR]

Four new prenylflavonol glycosides (1–4) along with two known analogues (5–6) were isolated from the leaves of Cyclocarya paliurus for the first time. The structures of these compounds were characterized by comprehensive analysis of 1 D, 2 D NMR, HRESIMS, UV data and enzymatic hydrolysis. In bioassays, compounds 1–4 were evaluated for inhibitory effects on xanthine oxidase (XOD) and effects on the inhibition of nitric oxide (NO) production in lipopolysaccharide (LPS) induced RAW264.7 cells. Moreover, compounds 1 and 2 showed outstanding XOD inhibitions with IC50 values of 18.16 ± 3.91 and 37.65 ± 5.67 µM, and exhibited inhibitions against LPS-induced NO production with IC50 values of 80.50 ± 3.09 and 82.28 ± 2.87 µM. [ABSTRACT FROM AUTHOR]

Three previously undescribed dammarane triterpenoid glycosides (1-3) along with five known analogues (4-8) were isolated from the leaves of Cyclocarya paliurus. Their structures and configurations were determined on the basis of comprehensive spectroscopic analyses, chemical hydrolysis and DFT GIAO 13C NMR calculation. All the isolates were evaluated cytotoxic activities against seven human cancer cell lines (MCF-7, PC-3, Du145, NCI-H1975, PC-9, SKVO3 and HepG2). Moreover, compound 4 showed a wide spectrum of cytotoxicity against human cancer cells with IC50 values ranging from 11.31 to 29.51 µM. [ABSTRACT FROM AUTHOR]

Two new robustaflavones, (±)-trichocladabiflavone A (1) and uncinatabiflavone E (2), along with seven known biflavanoids (3–9) were isolated from the 70% EtOH extract of Selaginella trichoclada. Their structures and absolute configurations were established by extensive spectroscopic and circular dichroism (CD) analyses. Compound 1 was resoluted into optically pure enantiomers (+)-1 and (−)-1 by chiral-phase HPLC. Moreover, compounds 1 and 2 exhibited moderate cytotoxicity against A549 and HepG2 human cancer cell lines. [ABSTRACT FROM AUTHOR]

One new pentacyclic triterpenoid, urs-12,16-dien-3-one (1), together with twelve known pentacyclic triterpenoids (2‒13), were isolated from the twigs and leaves of Melaleuca linariifolia. Their structures were characterized by their 1D- and 2 D-NMR spectra analysis and mass spectra studies. Furthermore, all isolated compounds were tested the inhibitory effect on proliferation of six human cancer cell lines in vitro, including NCI-H441, NCI-H460, A549, SKOV3, hela, and caki-1 cells. Among them, compounds 3, 5, 7, 9, 12, and 13 exhibited moderate antiproliferative activities with IC50 values ranging from 3.85 to 33.31 μM. [ABSTRACT FROM AUTHOR]

Two pairs of isocoumarin derivatives, (±)-rhytidhymarins A and B (1–2), one aromatic ester, rhytidhyster A (3), together with three known compounds (4–6) were isolated from fungus Rhytidhysteron sp. BZM-9. Compounds 1 and 2 are presented as racemates and resolved into optically pure enantiomers (+)-1/(−)-1 and (+)-2/(−)-2 by chiral column separation, respectively. Their planar structures were elucidated by HRESIMS, 1D and 2D NMR data and their absolute configurations were determined by X-ray crystallographic analysis and electronic circular dichroism (ECD) calculation. Compound 5 showed significant cytotoxic activity against SMMC7721 cells with an IC50 value of 0.338 μM and exhibited moderate antimicrobial activity to MRSA with a MIC value of 6.25 μg mL−1; compound 3 showed cytotoxicity against HepG2 cells with an IC50 value of 11.46 μM. [ABSTRACT FROM AUTHOR]

Three new biflavones, apigenin-(3′,8″)-chrysin (1), (2S)-2,3-Dihydroametoflavone 5,4′-dimethyl ether (2), and (2S)-5″,7″-Dihydroxy-2″-phenoxychromonyl-(4′″,3′)-naringenin (3), together with seven known biflavones (4–10) were isolated from the 75% EtOH extract of Selaginella doederleinii. The structures of new compounds were established by application of spectroscopic methods, including 1D and 2D NMR, HRMS, and CD measurements. In addition, all new compounds were evaluated for their cytotoxic potential against three human cancer cell lines A549, MCF-7, and SMMC-7721 in vitro. Compound 2 exhibited potent cytotoxic activity with IC50 values ranging from 6.35 to 10.18 μM. [ABSTRACT FROM AUTHOR]

Three previously undescribed seco-dammarane triterpenoid glycosides O-Q (1-3) along with two known compounds (4 and 5) were isolated and characterized from the leaves of Cyclocarya paliurus. Their structures were determined by comprehensive analysis of 1 D, 2 D NMR and HRESIMS data. Compounds 1-5 were evaluated for their inhibitory effects against human pancreatic tumor (ASPC-1), human gastric carcinoma (SNU5), liver hepatocellular carcinoma (HEPG-2) and human colon tumor (HCT116) cell lines. Among them cyclocarioside P (2) showed somewhat inhibitory activity towards those tumor cells. [ABSTRACT FROM AUTHOR]

Two new anthraquinone derivatives, selaginones A (1) and B (2), and one new triarylbenzophenone analog, selagibenzophenone B (3), were isolated from Selaginella tamariscina (Beauv.) Spring. Their structures were established by 1D-, 2D-NMR and HR-ESI-MS data. Compounds 1 and 2 represent the uncommon examples of aryl substituted anthraquinone derivatives. Especially, compound 2 is a unique anthranone with exceptional structural feature, in which a p-hydroxyphenyl moiety is attached to the C-10 position. Compound 3 is the second naturally occurring triarylbenzophenone and showed moderate activity against SMCC-7721 and MHCC97-H cell lines with IC50 values of 39.8, 51.5 μM respectively. [ABSTRACT FROM AUTHOR]

Three new neolignan derivatives (1–3), together with three known isolariciresinol derivatives (4–6) were isolated from Selaginella picta. Their structures were elucidated by spectroscopic methods (1D/2D NMR, HRESIMS and CD). All isolated compounds were assayed on the neuroprotective activity against the injury of HT-22 cells induced by L-Glutamate in vitro. All compounds displayed potent protective effect on HT-22 cells. [ABSTRACT FROM AUTHOR]

Phytochemical study on the n-BuOH extract of Selaginella delicatula lead to the isolation, characterization and structure elucidation of two new adenine analogues, delicatulines A (1) and B (2), one new pyrrole alkaloid (4), and five known compounds (3, 5–8). These new substances all contain an aliphatic chain in their parent nucleus, which were unusual to find in plants. In the present study, they were identified from Selaginellaceae for the first time. The structures and absolute configurations of these new compounds were determined by a combination of NMR and CD spectroscopic analyses. Compounds 1, 3 and 4 were evaluated for their inhibitory activities on HBV surface antigen and HBV DNA in HepAD38 cells. The results showed that these compounds had only weak or no inhibitive effects on HBV. [ABSTRACT FROM AUTHOR]

A new cyclic diarylheptanoid (1) and a new flavone glucoside (2), along with seven known compounds, were isolated from the green peel ofJuglans mandshurica. Their structures were elucidated based on extensive spectroscopic analyses. Moreover, the cytotoxicity against NCI-H460, A549, and K562 cancer cells of compounds1–6was evaluated. The results showed that compound3exhibited moderate inhibitory potency against the growth of three cell lines. [ABSTRACT FROM PUBLISHER]

Two new isobenzofuranone derivatives erinaceolactones G and H (1and2) were isolated from the ethanolic extract of fruiting bodies ofHericium erinaceus. Their structures were characterized on the basis of spectroscopic evidences. Compound2was suggested to be racemic by specific rotation, which was resolved by chiral HPLC into enantiomers. [ABSTRACT FROM PUBLISHER]

A new neolignan, selamoellenin A (1), was isolated from the whole plants of Selaginella moellendorffii Hieron. The structure was elucidated on the basis of comprehensive spectroscopic methods (1D/2D NMR and HRMS). Compound 1 was evaluated for its protective effect against high glucose-induced human umbilical vein endothelial cells (HUVECs) damage in vitro. [ABSTRACT FROM AUTHOR]

Three new isobenzofuranone derivatives erinaceolactones D-F (1–3), together with four known ones (4–7), were isolated from the fruiting bodies ofHericium erinaceus. Their structures were determined on the basis of comprehensive spectroscopic analyses including UV, 1D, 2D NMR and HR-TOF-MS. The absolute configuration of erinaceolactone D (1) and erinaceolactone E (2) were assigned by comparing their specific rotation with those of analogs in literatures. The four known compounds were isomers with each other and were isolated simultaneously for the first time. [ABSTRACT FROM PUBLISHER]

Hericium erinaceus is a well-known medicinal and edible mushroom, which is considered as a potential source to obtain antitumor candidates. In this work, five new isoindolinones, named erinaceolactams A-E ( 1 – 5 ), along with five known compounds ( 6 – 10 ), were isolated from 70% ethanol extract of the fruiting bodies of H . erinaceus . The structures of new compounds were validated by HRESIMS and 1D, 2D NMR. It's worth mentioning that there are two pairs of isomers included in the new compounds. Moreover, their cytotoxicity against metastatic human hepatocellular carcinoma cell lines SMMC-7221 and MHCC-97H were evaluated. The results showed that compounds 6 and 7 exhibited promising inhibitory potency against the growth of two cell lines. [ABSTRACT FROM AUTHOR]

Two new flavonoids, uncinataflavones A (1) and B (2), along with one known compound 6-(5-carboxyl-2-methoxyphenyl)-apigenin (3), were isolated fromSelaginella uncinata(Desv.) Spring. All these compounds belong to apigenin derivatives with aryl substituents at C-6 position. The structures of new compounds were elucidated on the basis of comprehensive spectroscopic analyses (UV, IR, 1D, and 2D NMR as well as HR-ESI-MS). [ABSTRACT FROM AUTHOR]

The most common and leading cause of cancer-related death in men is lung cancer. Despite the recent advances in chemotherapy, advanced lung cancer still remains incurable. For this, the understanding of molecular mechanisms involved in lung carcinogenesis is necessary to provide potentially effective therapeutic targets for the treatment of lung cancer, and thus the therapeutic limitations can be overcome. Cyclooxygenase-2 (COX-2) is an important inflammation factor that is reported to be up-regulated in different cancers. A number of COX-2 inhibitors have been developed, but most of them are restricted due to the different risk factors. Currently, the FDA has allowed celecoxib to remain on the market but advised physicians to apply this drug with alternative therapies or to use at a low dosage. Some other COX-2 inhibitors, such as, apricoxib and etoricoxib are under critical investigation currently. Celecoxib is being tested in clinical trials against lung cancer, as a single agent or in combination with other agents. Recent studies have suggested celecoxib as a feasible and clinically active regimen in the treatment of patients with lung cancer. However, more clinical trials are necessary for the better understanding of the role of selective COX-2 inhibitors in the prevention and treatment of lung cancer along with their assessment of toxicity. In this review, we have discussed the mechanism of actions of COX-2 in cancer progression and the therapeutic use of COX-2 inhibitors in the treatment of lung cancer with subsequent clinical studies and future management. [ABSTRACT FROM AUTHOR]

Two new selaginellin derivatives selaginellin P (1) and selaginellin Q (2) were isolated fromSelaginella tamariscina. The structures of1and2were established as 2,4′-dihydroxy-4-methyl-3-[(4-hydroxyphenyl)ethynyl]biphene (1) and 2,4′-dihydroxy-3-[(4-hydroxyphenyl)ethynyl]biphene (2) on the basis of spectroscopic means including HR-ESI-MS, 1D, and 2D NMR experiments. [ABSTRACT FROM PUBLISHER]