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https://www.readbyqxmd.com/read/28194418/antineoplastic-effects-of-honokiol-on-melanoma
#1
Ruth Guillermo-Lagae, Sreevidya Santha, Milton Thomas, Emily Zoelle, Jonathan Stevens, Radhey S Kaushik, Chandradhar Dwivedi
Honokiol, a plant lignan has been shown to have antineoplastic effects against nonmelanoma skin cancer developments in mice. In this study, antineoplastic effects of honokiol were investigated in malignant melanoma models. In vitro effects of honokiol treatment on SKMEL-2 and UACC-62 melanoma cells were evaluated by measuring the cell viability, proliferation, apoptosis, cell cycle analysis, and expressions of various proteins associated with cell cycle progression and apoptosis. For the in vivo study, male nude mice inoculated with SKMEL-2 or UACC-62 cells received injections of sesame oil or honokiol for two to seven weeks...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28174564/commiphora-leptophloeos-phytochemical-and-antimicrobial-characterization
#2
Jorge J de Souza Pereira, Aline de P C Pereira, Jannyson J B Jandú, Josinete A da Paz, Sergio Crovella, Maria T Dos Santos Correia, Jaqueline de Azevêdo Silva
Commiphora leptophloeos is a plant specie usually known for its medicinal purposes in local communities in Northeast Brazil. In order to evaluate its therapeutic potential, we aimed to determine the phytochemical and antimicrobial properties of C. leptophloeos extracts. Thin Layer Chromatography (TLC) was able to detect the presence of phenolic compounds, flavonoids and reducing sugars. Three phenolic compounds were identified by HPLC and described as Gallic, Chlorogenic and Protocatechuic acids. On the other hand, H(1)NMR analysis revealed the presence of hinokinin, a bioactive lignan further characterized in the present work...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28152041/differential-and-directional-estrogenic-signaling-pathways-induced-by-enterolignans-and-their-precursors
#3
Yun Zhu, Kayoko Kawaguchi, Ryoiti Kiyama
Mammalian lignans or enterolignans are metabolites of plant lignans, an important category of phytochemicals. Although they are known to be associated with estrogenic activity, cell signaling pathways leading to specific cell functions, and especially the differences among lignans, have not been explored. We examined the estrogenic activity of enterolignans and their precursor plant lignans and cell signaling pathways for some cell functions, cell cycle and chemokine secretion. We used DNA microarray-based gene expression profiling in human breast cancer MCF-7 cells to examine the similarities, as well as the differences, among enterolignans, enterolactone and enterodiol, and their precursors, matairesinol, pinoresinol and sesamin...
2017: PloS One
https://www.readbyqxmd.com/read/28110956/anti-hiv-diphyllin-glycosides-from-justicia-gendarussa
#4
Hong-Jie Zhang, Emily Rumschlag-Booms, Yi-Fu Guan, Kang-Lun Liu, Dong-Ying Wang, Wan-Fei Li, Van Hung Nguyen, Nguyen Manh Cuong, Djaja Doel Soejarto, Harry H S Fong, Lijun Rong
In a search for new anti-HIV active leads from over several thousands of plant extracts, we have identified a potent plant lead. The active plant is determined as Justicia gendarussa (Acanthaceae), a medicinal plant that has been used for the treatment of injury, arthritis and rheumatism in Asia including China. Our bioassay-guided fractionation of the methanol extract of the stems and barks of the plant led to the isolation of two anti-HIV compounds, justiprocumins A and B. The compounds are identified as new arylnaphthalide lignans (ANL) glycosides...
January 19, 2017: Phytochemistry
https://www.readbyqxmd.com/read/28073119/in-vitro-inhibition-of-human-cyp450s-1a2-2c9-3a4-5-2d6-and-2e1-by-grandisin
#5
Maísa Daniela Habenschus, Fernanda de Lima Moreira, Norberto Peporine Lopes, Anderson R M de Oliveira
Grandisin, a lignan isolated from many species of plants, such as Virola surinamensis, is a potential drug candidate due to its biological properties, highlighted by its antitumor and trypanocidal activities. In this study, the inhibitory effects of grandisin on the activities of human cytochrome P450 enzymes were investigated by using human liver microsomes. Results showed that grandisin is a competitive inhibitor of CYP2C9 and a competitive and mechanism-based inhibitor of CYP3A4/5. The apparent Ki value for CYP2C9 was 50...
January 10, 2017: Planta Medica
https://www.readbyqxmd.com/read/28068967/enterolactone-alters-fak-src-signaling-and-suppresses-migration-and-invasion-of-lung-cancer-cell-lines
#6
Shireen Chikara, Kaitlin Lindsey, Pawel Borowicz, Melpo Christofidou-Solomidou, Katie M Reindl
BACKGROUND: Systemic toxicity of chemotherapeutic agents and the challenges associated with targeting metastatic tumors are limiting factors for current lung cancer therapeutic approaches. To address these issues, plant-derived bioactive components have been investigated for their anti-cancer properties because many of these agents are non-toxic to healthy tissues. Enterolactone (EL) is a flaxseed-derived mammalian lignan that has demonstrated anti-migratory properties for various cancers, but EL has not been investigated in the context of lung cancer, and its anticancer mechanisms are ill-defined...
January 9, 2017: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/28038832/lignan-derivatives-from-selaginella-tamariscina-and-their-nitric-oxide-inhibitory-effects-in-lps-stimulated-raw-264-7-cells
#7
Le Duc Dat, Bing Tian Zhao, Nguyen Duc Hung, Jeong Hyung Lee, Byung Sun Min, Mi Hee Woo
The chemical characterization of Selaginella tamariscina leaves resulted in the isolation of five lignanoside derivatives (1-4 and 6) and one neolignan (5). These compounds include three new lignanosides, tamariscinosides D-F (1-3), and one liriodendrin (4) that were isolated for the first time from this plant, together with two known compounds, (2R,3S)-dihydro-2-(3,5-dimethoxy-4-hydroxyphenyl)-7-methoxy-5-acetyl-benzofuran (5) and moellenoside B (6). The chemical structures of these isolated compounds were determined using 1D and 2D NMR, MS, and CD spectroscopic data, and the results were compared to data previously reported in the literatures...
December 9, 2016: Bioorganic & Medicinal Chemistry Letters
https://www.readbyqxmd.com/read/28035371/the-anti-metastatic-effects-of-the-phytoestrogen-arctigenin-on-human-breast-cancer-cell-lines-regardless-of-the-status-of-er-expression
#8
Thressi Maxwell, So-Young Chun, Kyu-Shik Lee, Soyoung Kim, Kyung-Soo Nam
Arctigenin is a plant lignan extracted from Arctium lappa that has been shown to have estrogenic properties. In spite of the health benefits of phytoestrogens reducing the risk of osteoporosis, heart disease, and menopausal symptoms, its benefits against the risk of breast cancer have not been fully elucidated. Thus, we investigated the effects of arctigenin on metastasis of breast cancer using both estrogen receptor (ER)-positive MCF-7 and ER-negative MDA-MB-231 human breast cancer cell lines to see if the effects are dependent on the status of ER expression...
February 2017: International Journal of Oncology
https://www.readbyqxmd.com/read/27869784/phytochemical-profiling-of-flavonoids-phenolic-acids-terpenoids-and-volatile-fraction-of-a-rosemary-rosmarinus-officinalis-l-extract
#9
Pedro Mena, Martina Cirlini, Michele Tassotti, Kelli A Herrlinger, Chiara Dall'Asta, Daniele Del Rio
This paper presents a comprehensive analysis of the phytochemical profile of a proprietary rosemary (Rosmarinus officinalis L.) extract rich in carnosic acid. A characterization of the (poly)phenolic and volatile fractions of the extract was carried out using mass spectrometric techniques. The (poly)phenolic composition was assessed by ultra-high performance liquid chromatography-electrospray ionization-mass spectrometry (UHPLC-ESI-MS(n)) and a total of 57 compounds were tentatively identified and quantified, 14 of these being detected in rosemary extract for the first time...
November 19, 2016: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/27858135/expression-in-pichia-pastoris-and-characterization-of-two-novel-dirigent-proteins-for-atropselective-formation-of-gossypol
#10
Isabelle Effenberger, Michael Harport, Jens Pfannstiel, Iris Klaiber, Andreas Schaller
We established an efficient fed-batch fermentation process for two novel dirigent proteins from cotton plants, GbDIR2 from Gossypium barbadense and GhDIR3 from G. hirsutum, using the engineered Pichia pastoris GlycoSwitch® SuperMan5 strain to prevent hyperglycosylation. The two (His)6-tagged proteins were purified by metal-chelate affinity chromatography and obtained in quantities of 12 and 15 mg L(-1) of culture volume, respectively. Glycosylation sites were identified for the native and for the enzymatically deglycosylated proteins by mass spectrometry, confirming five to six of the seven predicted glycosylation sites in the NxS/T sequence context...
November 17, 2016: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/27856749/in-vivo-amelioration-of-endogenous-antitumor-autoantibodies-via-low-dose-p4n-through-the-lta4h-activin-a-baff-pathway
#11
Yu-Ling Lin, Nu-Man Tsai, Cheng-Hao Hsieh, Shu-Yi Ho, Jung Chang, Hsin-Yi Wu, Ming-Hua Hsu, Chia-Ching Chang, Kuang-Wen Liao, Tiffany L B Jackson, David E Mold, Ru Chih C Huang
Cancer progression is associated with the development of antitumor autoantibodies in patients' sera. Although passive treatment with antitumor antibodies has exhibited remarkable therapeutic efficacy, inhibitory effects on tumor progression by endogenous antitumor autoantibodies (EAAs) have been limited. In this study, we show that P4N, a derivative of the plant lignan nordihydroguaiaretic acid (NDGA), enhanced the production of EAAs and inhibited tumor growth at low noncytotoxic concentrations via its immunoregulatory activity...
November 29, 2016: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/27819481/characterization-of-klebsiella-sp-strain-s1-a-bacterial-producer-of-secoisolariciresinol-through-biotransformation
#12
Yu-Jie Zhou, Songling Zhu, Dong-Hui Yang, Dan-Dan Zhao, Jia-Jing Li, Shu-Lin Liu
Secoisolariciresinol (SECO) is a lignan of potential therapeutic value for diseases such as cancer, but its use has been limited by the lack of ideal production methods, even though its precursors are abundant in plants, such as flaxseeds. Here, we report the characterization of a bacterial strain, S1, isolated from the human intestinal flora, which could produce secoisolariciresinol by biotransformation of precursors in defatted flaxseeds. This bacterium was a Gram-negative and facultatively anaerobic straight rod without capsules...
January 2017: Canadian Journal of Microbiology
https://www.readbyqxmd.com/read/27818835/the-genus-luehea-malvaceae-tiliaceae-review-about-chemical-and-pharmacological-aspects
#13
REVIEW
João Tavares Calixto-Júnior, Selene Maia de Morais, Aracélio Viana Colares, Henrique Douglas Melo Coutinho
Popularly known as "açoita-cavalo" (whips-horse), Luehea species (Malvaceae-Tilioideae) are native to America and are used in folk medicine as anti-inflammatory, antidiarrheal, antiseptic, expectorant, and depurative and against skin infections. Although there are studies showing the chemical constituents of some species, the active substances have not been properly identified. A systematic study was carried out through a computer search of data on CAPES journals, SciELO, ISI Bireme, PubMed, ScienceDirect, ScienceDomain Medline, and Google Scholar from published articles using key words: Luehea, açoita-cavalo, and Malvaceae...
2016: Journal of Pharmaceutics
https://www.readbyqxmd.com/read/27776375/investigation-of-the-lignan-content-in-extracts-from-linum-callitris-and-juniperus-species-in-relation-to-their-in-vitro-antiproliferative-activities
#14
Joël Doussot, Véronique Mathieu, Cyril Colas, Roland Molinié, Cyrielle Corbin, Josiane Montguillon, Laeticia Moreno Y Banuls, Sullivan Renouard, Frédéric Lamblin, Patricia Dupré, Benoit Maunit, Robert Kiss, Christophe Hano, Eric Lainé
Podophyllotoxin, a lignan still extracted from the rhizomes of Podophyllum hexandrum (Berberidaceae), is the starting molecule for the semisynthesis of widely used anticancer drugs such as etoposide. However, this source is threatened by the over-collection of P. hexandrum. Plants belonging to the Linaceae and Cupressaceae families could be attractive alternative sources with species that contain the lignan podophyllotoxin or its precursors and derivatives. Wild flax species, such as Linum flavum, as well as some Juniperus and Callitris species were investigated for their lignan content, and the in vitro antiproliferative capacity of their extracts was assayed on four tumor cell lines...
October 24, 2016: Planta Medica
https://www.readbyqxmd.com/read/27774796/lignans-from-the-shed-trunk-barks-of-the-critically-endangered-plant-abies-beshanzuensis-and-their-anti-neuroinflammatory-activities
#15
Chang-Ling Hu, Juan Xiong, Peng Xu, Ke-Jun Cheng, Guo-Xun Yang, Jin-Feng Hu
During a further and comprehensive phytochemical investigation on the shed trunk barks of the critically endangered plant Abies beshanzuensis, one new (1) and ten known (2-11) lignans with diverse structures were isolated. On the basis of spectroscopic methods, the new structure was established to be (7S,8R,8'R)-4'-methoxyl-α-conidendrin (1). Among the isolated lignans, (-)-matairesinol (5) and (-)-arctigenin (6) showed significant anti-neuroinflammatory activities by inhibiting the overproduction of nitric oxide in lipopolysaccharide-stimulated murine BV-2 microglial cells, with IC50 values of 11...
October 23, 2016: Natural Product Research
https://www.readbyqxmd.com/read/27768772/de-novo-transcriptomes-of-forsythia-koreana-using-a-novel-assembly-method-insight-into-tissue-and-species-specific-expression-of-lignan-biosynthesis-related-gene
#16
Akira Shiraishi, Jun Murata, Erika Matsumoto, Shin Matsubara, Eiichiro Ono, Honoo Satake
Forsythia spp. are perennial woody plants which are one of the most extensively used medicinal sources of Chinese medicines and functional diets owing to their lignan contents. Lignans have received widespread attention as leading compounds in the development of antitumor drugs and healthy diets for reducing the risks of lifestyle-related diseases. However, the molecular basis of Forsythia has yet to be established. In this study, we have verified de novo deep transcriptome of Forsythia koreana leaf and callus using the Illumina HiSeq 1500 platform...
2016: PloS One
https://www.readbyqxmd.com/read/27767340/new-lignan-glycosides-from-justicia-procumbens
#17
Hong Jin, Shu Yang, Jun-Xing Dong
Four new lignan glycosides (1-4), named procumbenosides I, K, L, and M, together with cleistanthin B (5) reported for the first time in the genus Justicia, and 5 other known arylnaphthalene lignan glycosides (6-10) were isolated from the whole plant of Justicia procumbens. The structures of the new compounds were elucidated by extensive one-dimensional (1D) and two-dimensional (2D) NMR experiments and mass spectrometry. Procumbenoside M (4) was a rare sesquilignan glycoside never previously reported in the species of Justicia...
January 2017: Journal of Asian Natural Products Research
https://www.readbyqxmd.com/read/27765369/eremophila-maculata-isolation-of-a-rare-naturally-occurring-lignan-glycoside-and-the-hepatoprotective-activity-of-the-leaf-extract
#18
Fadia S Youssef, Mohamed L Ashour, Mansour Sobeh, Hesham A El-Beshbishy, Abdel Nasser Singab, Michael Wink
BACKGROUND: The Australian plant Eremophila maculata F. Muell (Scrophulariaceae) is cultivated worldwide as an ornamental plant. PURPOSE: This study was designed to assess the antioxidant and hepatoprotective activities of a methanol extract from E. maculata leaves (EMM) both in vitro and in vivo (rats) experiments. Detailed phytochemical study was done on the extract followed by molecular docking experiments on TNF-α ascertain the efficacy of the isolated compounds...
November 15, 2016: Phytomedicine: International Journal of Phytotherapy and Phytopharmacology
https://www.readbyqxmd.com/read/27756822/dirigent-protein-mode-of-action-revealed-by-the-crystal-structure-of-atdir6
#19
Raphael Gasper, Isabelle Effenberger, Piotr Kolesinski, Barbara Terlecka, Eckhard Hofmann, Andreas Schaller
Dirigent proteins impart stereoselectivity to phenoxy radical coupling reactions in plants and, thus, play an essential role in the biosynthesis of biologically active natural products. This includes the regioselective and enantioselective coupling and subsequent cyclization of two coniferyl alcohol radicals to pinoresinol as the committed step of lignan biosynthesis. The reaction is controlled by dirigent proteins, which, depending on the species and protein, direct the reaction to either (+)- or (-)-pinoresinol...
December 2016: Plant Physiology
https://www.readbyqxmd.com/read/27740756/validated-lc-ms-ms-method-for-the-quantification-of-free-and-bound-lignans-in-cereal-based-diets-and-feces
#20
Natalja P Nørskov, Knud Erik Bach Knudsen
Despite the extensive literature describing the biological effects of phenolic compounds from cereals, little is known about their bioaccessibility in the food matrix. This paper describes a validated LC-MS/MS method for the quantification of free and total content (free + bound) of eight plant lignans (matairesinol, hydroxymatairesinol, secoisolariciresinol, lariciresinol, isolariciresinol, syringaresinol, medioresinol, and pinoresinol) and two enterolignans (enterodiol and enterolactone) in cereal-based diets/bread and feces...
November 9, 2016: Journal of Agricultural and Food Chemistry
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