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https://www.readbyqxmd.com/read/28529696/in-silico-gene-expression-profiling-in-cannabis-sativa
#1
Luca Massimino
The cannabis plant and its active ingredients (i.e., cannabinoids and terpenoids) have been socially stigmatized for half a century. Luckily, with more than 430,000 published scientific papers and about 600 ongoing and completed clinical trials, nowadays cannabis is employed for the treatment of many different medical conditions. Nevertheless, even if a large amount of high-throughput functional genomic data exists, most researchers feature a strong background in molecular biology but lack advanced bioinformatics skills...
2017: F1000Research
https://www.readbyqxmd.com/read/28526743/systematic-identification-of-functional-residues-of-artemisia-annua-amorpha-4-11-diene-synthase
#2
Xin Fang, Jian-Xu Li, Jin-Quan Huang, You-Li Xiao, Peng Zhang, Xiao-Ya Chen
Terpene synthases (TPSs) are responsible for the extremely diversified and complex structure of terpenoids. Amorpha-4,11-diene synthase (ADS) has a high (90%) fidelity in generating the sesquiterpene precursor for biosynthesis of artemisinin, an antimalarial drug, however, little is known about how active site residues of ADS involved in the carbocation rearrangement and cyclization reactions. Here, we identify seven residues that are key to most of the catalytic steps in ADS. By structural modeling and amino acid sequence alignments of ADS with two functionally relevant sesquiterpene synthases from Artemisia annua, we performed site-directed mutagenesis and found that a single substitution, T296V, impaired the ring closure activity almost completely, and tetra-substitutions (L374Y/L404V/L405I/G439S) led to an enzyme generating 80% monocyclic bisabolyl-type sesquiterpenes, whereas a double mutant (T399L/T447G) showed compromised activity in regioselective deprotonation to yield 34...
May 19, 2017: Biochemical Journal
https://www.readbyqxmd.com/read/28524111/synthesis-and-pharmacological-properties-of-novel-esters-based-on-monoterpenoids-and-glycine
#3
Mariia Nesterkina, Iryna Kravchenko
Esters based on mono- and bicyclic terpenoids with glycine have been synthesized via Steglich esterification and characterized by ¹H-NMR, IR, and mass spectral studies. Their analgesic and anti-inflammatory activities were investigated after transdermal delivery on models of formalin, capsaicin, and AITC-induced pain, respectively. Glycine esters of menthol and borneol exhibited higher antinociceptive action, whereas eugenol derivative significantly suppressed the development of the inflammatory process. The mechanism of competitive binding between terpenoid esters and TRPA1/TRPV1 agonists was proposed explaining significant analgesic effect of synthesized derivatives...
May 18, 2017: Pharmaceuticals
https://www.readbyqxmd.com/read/28521055/tying-the-knot-occurrence-and-possible-significance-of-gene-fusions-in-plant-metabolism-and-beyond
#4
Jillian M Hagel, Peter J Facchini
Gene fusions have recently attracted attention especially in the field of plant specialized metabolism. The occurrence of a gene fusion, in which originally separate gene products are combined into a single polypeptide, often corresponds to the functional association of individual components within a single metabolic pathway. Examples include gene fusions implicated in benzylisoquinoline alkaloid (BIA), terpenoid, and amino acid biosynthetic pathways, in which distinct domains within a fusion catalyze consecutive, yet independent reactions...
May 18, 2017: Journal of Experimental Botany
https://www.readbyqxmd.com/read/28514707/influence-of-fumigants-on-sunflower-seeds-characteristics-of-fumigant-desorption-and-changes-in-volatile-profiles
#5
Nadine Austel, Jens Schubert, Sabrina Gadau, Harald Jungnickel, Lygia T Budnik, Andreas Luch
Fumigation of transport containers is common practice to protect stored products from pests. Yet little is known about the desorption times and effects of the highly toxic gases used in this process. To shed light on the behavior of fumigants in real food, we treated sunflower seeds (Helianthus annuus L.) with 100ppm phosphine (PH3), methyl bromide (MeBr) or 1,2-dichloroethane (DCE) for 72h. The compound concentrations in the air were then analyzed by thermal desorption/2D gas chromatography coupled to mass spectrometry and flame photometric detection (TD-2D-GC-MS/FPD)...
April 29, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28512605/toxicity-status-and-antiulcerative-potential-of-sansevieria-trifasciata-leaf-extract-in-wistar-rats
#6
Osasenaga Macdonald Ighodaro, Abiola Muhammad Adeosun, Barinemene Francis Ojiko, Abeeb Taiwo Akorede, Oyindamola Fuyi-Williams
AIMS: The lethal dose 50% (LD50) and antiulcerative potentials of Sansevieria trifasciata (ST) leaf extract were investigated. MATERIALS AND METHODS: LD50 was determined through two routes of administration (intraperitoneal [i.p] and oral [p.o]) using the method of Lorke. The antiulcerative activity was evaluated in indomethacin-induced ulcer model (40 mg/kg body weight [BW], i.p, single dose) against a reference drug, cimetidine (100 mg/kg BW, p.o). ST was assessed at two different doses (200 and 400 mg/kg BW, p...
April 2017: Journal of Intercultural Ethnopharmacology
https://www.readbyqxmd.com/read/28512598/phytochemical-screening-and-study-of-antioxidant-antimicrobial-antidiabetic-anti-inflammatory-and-analgesic-activities-of-extracts-from-stem-wood-of-pterocarpus-marsupium-roxburgh
#7
Dipak Raj Pant, Narayan Dutt Pant, Dil Bahadur Saru, Uday Narayan Yadav, Dharma Prasad Khanal
AIMS: The main aims of the study were to evaluate the phytochemical constituents and to study the antioxidant, antimicrobial, antidiabetic, anti-inflammatory, and analgesic activities of extracts from stem wood of Pterocarpus marsupium. MATERIALS AND METHODS: Ethanol, acetone and isopropyl alcohol (IPA) (1:1) extracts of stem wood of P. marsupium were subjected to phytochemical screening and analysis of biological activities from August 2015 to January 2016. The antioxidant assay was carried out using 2, 2-diphenyl-1-picrylhydrazyl scavenging method, antimicrobial activity testing by cup diffusion method, antidiabetic test evaluation by oral glucose tolerance test in mice, anti-inflammatory effect was evaluated by hind paw edema method in mice and analgesic test evaluation by a chemical writhing method in mice...
April 2017: Journal of Intercultural Ethnopharmacology
https://www.readbyqxmd.com/read/28510286/an-enyne-cope-rearrangement-enables-polycycloalkane-synthesis-from-abundant-starting-materials-by-a-simple-strategy
#8
Sarah K Scott, Alexander J Grenning
Cyclohexanone-derived Knoevenagel adducts (cyclohexylidenemalononitriles) and two different propargyl electrophiles serve as carbon sources for assembling diverse 6/7/5 tricycloalkanes, a common terpenoid framework. The sequence involves three unique reactions: (i.) deconjugative propargylation, (ii.) one-pot enyne Cope rearrangement/deconjugative propargylation, and (iii.) allenic-Pauson-Khand reaction.
May 16, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28508121/overexpression-of-smmyb9b-enhances-tanshinone-concentration-in-salvia-miltiorrhiza-hairy-roots
#9
Jingxian Zhang, Lubin Zhou, Xiaoyu Zheng, Jinjia Zhang, Li Yang, Ronghui Tan, Shujuan Zhao
A Salvia miltiorrhiza R2R3-MYB gene, SmMYB9b , has been cloned and characterized. Overexpression of SmMYB9b resulted in a significant improvement of tanshinones, the lipophilic active ingredients in danshen hairy roots. Plant R2R3-MYB transcription factors play important roles in various physiological and biochemical processes. Danshen (Salvia miltiorrhiza bunge) is a valuable medicinal herb with tanshinones and salvianolic acids as the principal bioactive ingredients. A number of putative R2R3-MYB transcription factors have been identified in the plant, but their function remains to be studied...
May 15, 2017: Plant Cell Reports
https://www.readbyqxmd.com/read/28504920/silicon-s-role-in-abiotic-and-biotic-plant-stresses
#10
Daniel Debona, Fabrício A Rodrigues, Lawrence E Datnoff
Silicon (Si) plays a pivotal role in the nutritional status of a wide variety of monocot and dicot plant species and helps them, whether direct or indirectly, counteract abiotic and/or biotic stresses. In general, plants with a high root or shoot Si concentration are less prone to suffer from pest attack and exhibit enhanced tolerance to abiotic stresses such as drought, low temperature, or metal toxicity. However, the most notable effect of Si is the reduction in the intensities of a number of seedborne, soilborne, and foliar diseases in many economically important crops that are caused by biotrophic, hemibiotrophic, and necrotrophic plant pathogens...
May 15, 2017: Annual Review of Phytopathology
https://www.readbyqxmd.com/read/28503089/anticancer-chemodiversity-of-ranunculaceae-medicinal-plants-molecular-mechanisms-and-functions
#11
REVIEW
Da-Cheng Hao, Chun-Nian He, Jie Shen, Pei-Gen Xiao
The buttercup family, Ranunculaceae, comprising more than 2,200 species in at least 62 genera, mostly herbs, has long been used in folk medicine and worldwide ethnomedicine since the beginning of human civilization. Various medicinal phytometabolites have been found in Ranunculaceae plants, many of which, such as alkaloids, terpenoids, saponins, and polysaccharides, have shown anti-cancer activities in vitro and in vivo. Most concerns have been raised for two epiphany molecules, the monoterpene thymoquinone and the isoquinoline alkaloid berberine...
February 2017: Current Genomics
https://www.readbyqxmd.com/read/28503052/wound-healing-property-review-of-siam-weed-chromolaena-odorata
#12
REVIEW
Anushika Sirinthipaporn, Wannee Jiraungkoorskul
Chromolaena odorata (Family: Asteraceae) synonyms as Eupatorium odoratum is a traditional medicinal plant that is widely used for its wound healing property. In particular, the several parts of this herb have been used to treat wounds, burns, and skin infections. Furthermore, it has also been shown to possess anticancer, antidiabetic, anti-hepatotoxic, anti-inflammatory, antimicrobial, and antioxidant properties. Its phytochemical components are alkaloids, flavonoids, flavanone, essential oils, phenolics, saponins, tannins, and terpenoids...
January 2017: Pharmacognosy Reviews
https://www.readbyqxmd.com/read/28503051/an-update-review-on-the-anthelmintic-activity-of-bitter-gourd-momordica-charantia
#13
REVIEW
Sutthaya Poolperm, Wannee Jiraungkoorskul
Momordica charantia (Family: Cucurbitales), as known as bitter melon or gourd, is a daily consumption as food and traditional medicinal plant in Southeast Asia and Indo-China. It has been shown to possess anticancer, antidepressant, antidiabetic, anti-inflammatory, antimicrobial, antiobesity, antioxidant, and antiulcer properties. Its common phytochemical components include alkaloids, charantin, flavonoids, glycosides, phenolics, tannins, and terpenoids. This plant is rich in various saponins including momordicin, momordin, momordicoside, karavilagenin, karaviloside, and kuguacin, all of which have been reported to contribute to its remedial properties including antibacterial, antifungal, antiviral, and antiparasitic infections...
January 2017: Pharmacognosy Reviews
https://www.readbyqxmd.com/read/28503048/antifertility-effect-of-bougainvillea-spectabilis-or-paper-flower
#14
REVIEW
Anisa Ghogar, Wannee Jiraungkoorskul
Bougainvillea spectabilis (Family: Nyctaginaceae), commonly referred to as Great Bougainvillea or Paper Flower, is one of the traditional medicinal plants with potential antifertility activity. The aqueous extract and decoction of this plant have been used as fertility control among the tribal people in many countries. Furthermore, it has been shown to possess anticancer, antidiabetic, antihepatotoxic, anti-inflammatory, antihyperlipidemic, antimicrobial, antioxidant, and antiulcer properties. Its phytoconstituents such as alkaloids, essential oils, flavonoids, glycosides, oxalates, phenolics, phlobotannins, quinones, saponins, tannins, and terpenoids were reported as the basis of its efficacious therapeutic properties...
January 2017: Pharmacognosy Reviews
https://www.readbyqxmd.com/read/28501003/phytochemicals-for-taming-agitated-immune-endocrine-neural-axis
#15
REVIEW
Seema Patel
Homeostasis of immune-endocrine-neural axis is paramount for human health. If this axis gets agitated due to age, genetic variations, environmental exposures or lifestyle assaults, a cascade of adverse reactions occurs in human body. Cytokines, hormones and neurotransmitters, the effector molecules of this axis behave erratically, leading to a gamut of neural, endocrine, autoimmune, and metabolic diseases. Current panel of drugs can tackle some of them but not in a sustainable, benign way as a myriad of side effects, causal of them have been documented...
May 10, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28499243/diospyros-an-under-utilized-multi-purpose-plant-genus-a-review
#16
REVIEW
Abdur Rauf, Ghias Uddin, Seema Patel, Ajmal Khan, Sobia Ahsan Halim, Saud Bawazeer, Khalid Ahmad, Naveed Muhammad, Mohammad S Mubarak
The genus Diospyros from family Ebenaceae has versatile uses including edible fruits, valuable timber, and ornamental uses. The plant parts of numerous species have been in use as remedies in various folk healing practices, which include therapy for hemorrhage, incontinence, insomnia, hiccough, diarrhea etc. Phytochemical constituents such as terpenoids, ursanes, lupanes, polyphenols, tannins, hydrocarbons, and lipids, benzopyrones, naphthoquinones, oleananes, and taraxeranes have been isolated from different species of this genus...
May 9, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28497409/a-rapid-and-reliable-method-for-total-protein-extraction-from-succulent-plants-for-proteomic-analysis
#17
Fernando Lledías, Felipe Hernández, Viridiana Rivas, Abisaí García-Mendoza, Gladys I Cassab, Jorge Nieto-Sotelo
Crassulacean acid metabolism plants have some morphological features, such as succulent and reduced leaves, thick cuticles, and sunken stomata that help them prevent excessive water loss and irradiation. As molecular constituents of these morphological adaptations to xeric environments, succulent plants produce a set of specific compounds such as complex polysaccharides, pigments, waxes, and terpenoids, to name a few, in addition to uncharacterized proteases. Since all these compounds interfere with the analysis of proteins by electrophoretic techniques, preparation of high quality samples from these sources represents a real challenge...
May 12, 2017: Protein Journal
https://www.readbyqxmd.com/read/28495602/a-review-of-traditional-uses-phytochemistry-and-pharmacology-of-portulaca-oleracea-l
#18
REVIEW
Milad Iranshahy, Behjat Javadi, Mehrdad Iranshahi, Seyedeh Pardis Jahanbakhsh, Saman Mahyari, Faezeh Vahdati Hassani, Gholamreza Karimi
ETHNOPHARMACOLOGICAL RELEVANCE: Portulaca oleracea L. is a widespread medicinal plant that is used not only as an edible plant, but also as a traditional medicine for alleviating a wide spectrum of diseases. It is a well-known plant in the European Traditional Medicine. PA is mentioned by Dioscorides (40-90 CE), with the name of "andrachne". AIM OF THE REVIEW: In this study, we provide detailed information on botany, traditional uses, phytochemistry, pharmacological uses, pharmacokinetics and safety of P...
May 8, 2017: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/28491071/exploring-blueberry-aroma-complexity-by-chromatographic-and-direct-injection-spectrometric-techniques
#19
Brian Farneti, Iuliia Khomenko, Marcella Grisenti, Matteo Ajelli, Emanuela Betta, Alberto Alarcon Algarra, Luca Cappellin, Eugenio Aprea, Flavia Gasperi, Franco Biasioli, Lara Giongo
Blueberry (Vaccinium spp.) fruit consumption has increased over the last 5 years, becoming the second most important soft fruit species after strawberry. Despite the possible economic and sensory impact, the blueberry volatile organic compound (VOC) composition has been poorly investigated. Thus, the great impact of the aroma on fruit marketability stimulates the need to step forward in the understanding of this quality trait. Beside the strong effect of ripening, blueberry aroma profile also varies due to the broad genetic differences among Vaccinium species that have been differently introgressed in modern commercial cultivars through breeding activity...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28490124/explaining-the-antioxidant-activity-of-some-common-non-phenolic-components-of-essential-oils
#20
Andrea Baschieri, Majlinda Daci Ajvazi, Judith Laure Folifack Tonfack, Luca Valgimigli, Riccardo Amorati
Limonene, linalool and citral are common non-phenolic terpenoid components of essential oils, with attributed controversial antioxidant properties. The kinetics of their antioxidant activity was investigated using the inhibited autoxidation of a standard model substrate. Results indicate that antioxidant behavior of limonene, linalool and citral occurs by co-oxidation with the substrate, due to very fast self-termination and cross-termination of the oxidative chain. Rate constants kp and 2kt, (M(-1)s(-1)) at 30°C were 4...
October 1, 2017: Food Chemistry
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