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Secondary metabolites

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https://www.readbyqxmd.com/read/28550653/phytochemical-profile-and-angiotensin-i-converting-enzyme-ace-inhibitory-activity-of-limonium-michelsonii-lincz
#1
Janar Jenis, Jeong Yoon Kim, Zia Uddin, Yeong Hun Song, Hyeong-Hwan Lee, Ki Hun Park
Members of the genus Limonium are widely used as medicinal herbs due to their health-promoting effects, such as an ability to improve blood circulation by inhibiting angiotensin I converting enzyme (ACE). While the potential of L. michelsonii Lincz. (a medicinal plant endemic to Kazakhstan) to inhibit ACE has been demonstrated, the inhibitory activities of its secondary metabolites have not been explored. In this work, the principal phenolic compounds (1-20) among these metabolites were isolated to determine the components responsible for ACE inhibition...
May 26, 2017: Journal of Natural Medicines
https://www.readbyqxmd.com/read/28550524/cop9-signalosome-subunit-pfcsne-regulates-secondary-metabolism-and-conidial-formation-in-pestalotiopsis-fici
#2
Yanjing Zheng, Xiuna Wang, Xiaoling Zhang, Wei Li, Gang Liu, Shihua Wang, Xiufeng Yan, Huixi Zou, Wen-Bing Yin
The COP9 signalosome (CSN) is a highly conserved multiprotein complex in all eukaryotes and involved in regulation of organism development. In filamentous fungi, several lines of evidence indicate that fungal development and secondary metabolism (SM) are mediated by the fifth subunit of CSN, called CsnE. Here we uncover a connection with CsnE and conidial formation as well as SM regulation in the plant endophytic fungus Pestalotiopsis fici. A homology search of the P. fici genome with CsnE, involved in sexual development and SM in Aspergillus nidulans, identified PfCsnE...
May 25, 2017: Science China. Life Sciences
https://www.readbyqxmd.com/read/28549859/ethnopharmacological-investigations-of-the-cardio-renal-properties-of-a-native-species-from-the-region-of-pantanal-state-of-mato-grosso-do-sul-brazil
#3
Cleide Adriane Signor Tirloni, Francislaine Aparecida Dos Reis Lívero, Rhanany Alan Calloi Palozi, Renan César Alves Silveira, Paulo César de Paula Vasconcelos, Roosevelt Isaias Carvalho Souza, Ariany Carvalho Dos Santos, Valter Paes de Almeida, Jane Manfron Budel, Lauro Mera de Souza, Arquimedes Gasparotto Junior
ETHNOPHARMACOLOGICAL RELEVANCE: Acanthospermum hispidum DC. is an important medicinal herb that belongs to family Asteraceae, popularly used as a diuretic and hypotensive in the region of Pantanal, state of Mato Grosso do Sul, Brazil. Despite the relevance of this species throughout the country, there are no detailed studies about its possible ethnobotanical indication. AIM: To carry out a detailed ethnopharmacological investigation of the cardio-renal properties of A...
May 23, 2017: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/28548851/celastrofurans-a-g-dihydro-%C3%AE-agarofurans-from-the-australian-rainforest-vine-celastrus-subspicata-and-their-inhibitory-effect-on-leucine-transport-in-prostate-cancer-cells
#4
Mario Wibowo, Qian Wang, Jeff Holst, Jonathan M White, Andreas Hofmann, Rohan A Davis
Seven new dihydro-β-agarofurans, celastrofurans A-G (1-7), along with two known secondary metabolites, 9β-benzoyloxy-1α-furoyloxydihydro-β-agarofuran (8) and (1R,2R,4R,5S,7R,9S,10R)-2-acetoxy-9-benzoyloxy-1-furoyloxydihydro-β-agarofuran (9), were obtained from the leaves of the Australian rainforest vine, Celastrus subspicata. The structures of the new compounds were determined by detailed spectroscopic (1D/2D NMR) and MS data analysis. The absolute configurations of compounds 1-4 were defined by ECD and single-crystal X-ray diffraction studies...
May 26, 2017: Journal of Natural Products
https://www.readbyqxmd.com/read/28547736/rice-bran-metabolome-contains-amino-acids-vitamins-cofactors-and-phytochemicals-with-medicinal-and-nutritional-properties
#5
Iman Zarei, Dustin G Brown, Nora Jean Nealon, Elizabeth P Ryan
BACKGROUND: Rice bran is a functional food that has shown protection against major chronic diseases (e.g. obesity, diabetes, cardiovascular disease and cancer) in animals and humans, and these health effects have been associated with the presence of bioactive phytochemicals. Food metabolomics uses multiple chromatography and mass spectrometry platforms to detect and identify a diverse range of small molecules with high sensitivity and precision, and has not been completed for rice bran...
December 2017: Rice
https://www.readbyqxmd.com/read/28547385/flavonoids-promising-natural-compounds-against-viral-infections
#6
REVIEW
Hovakim Zakaryan, Erik Arabyan, Adrian Oo, Keivan Zandi
Flavonoids are widely distributed as secondary metabolites produced by plants and play important roles in plant physiology, having a variety of potential biological benefits such as antioxidant, anti-inflammatory, anticancer, antibacterial, antifungal and antiviral activity. Different flavonoids have been investigated for their potential antiviral activities and several of them exhibited significant antiviral properties in in vitro and even in vivo studies. This review summarizes the evidence for antiviral activity of different flavonoids, highlighting, where investigated, the cellular and molecular mechanisms of action on viruses...
May 25, 2017: Archives of Virology
https://www.readbyqxmd.com/read/28547376/nonribosomal-peptides-and-polyketides-of-burkholderia-new-compounds-potentially-implicated-in-biocontrol-and-pharmaceuticals
#7
Qassim Esmaeel, Maude Pupin, Philippe Jacques, Valérie Leclère
Bacteria belonging to the genus Burkholderia live in various ecological niches and present a significant role in the environments through the excretion of a wide variety of secondary metabolites including modular nonribosomal peptides (NRPs) and polyketides (PKs). These metabolites represent a widely distributed biomedically and biocontrol important class of natural products including antibiotics, siderophores, and anticancers as well as biopesticides that are considered as a novel source that can be used to defend ecological niche from competitors and to promote plant growth...
May 25, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28546495/complete-genome-sequence-of-streptomyces-sp-sge12-which-produces-antibacterial-and-fungicidal-activities
#8
Jianguo Xu, Min Xu, Kai Liu, Qinyin Peng, Meifeng Tao
Streptomyces sp. Sge12 was isolated from forest soil and exhibited remarkable antimicrobial activities against selected fungi and Gram-positive bacteria. Here, we report the complete genome sequence of this strain, which contains 37 putative secondary metabolite gene clusters.
May 25, 2017: Genome Announcements
https://www.readbyqxmd.com/read/28545854/transcriptome-wide-identification-of-host-genes-targeted-by-tomato-spotted-wilt-virus-derived-small-interfering-rnas
#9
Shunmugiah V Ramesh, Sarah Williams, Madhu Kappagantu, Neena Mitter, Hanu R Pappu
RNA silencing mechanism functions as a major defense against invading viruses. The caveat in the RNA silencing mechanism is that the effector small interfering RNAs (siRNAs) act on any RNA transcripts with sequence complementarity irrespective of target's origin. A subset of highly expressed viral small interfering RNAs (vsiRNAs) derived from the tomato spotted wilt virus (TSWV; Tospovirus: Bunyaviridae) genome was analyzed for their propensity to downregulate the tomato transcriptome. A total of 11898 putative target sites on tomato transcripts were found to exhibit a propensity for down regulation by TSWV-derived vsiRNAs...
May 22, 2017: Virus Research
https://www.readbyqxmd.com/read/28545532/cytotoxicity-of-the-methanol-extracts-of-elephantopus-mollis-kalanchoe-crenata-and-4-other-cameroonian-medicinal-plants-towards-human-carcinoma-cells
#10
Victor Kuete, Fabrice W Fokou, Oğuzhan Karaosmanoğlu, Veronique P Beng, Hülya Sivas
BACKGROUND: Cancer still constitutes one of the major health concerns globally, causing serious threats on patients, their families, and the healthcare system. METHODS: In this study, the cytotoxicity of the methanol extract of Elephantopus mollis whole plant (EMW), Enantia chlorantha bark (ECB), Kalanchoe crenata leaves (KCL), Lophira alata bark (LAB), Millettia macrophylla leaves (MML) and Phragmanthera capitata leaves (PCL) towards five human solid cancer cell lines and normal CRL2120 fibroblasts, was evaluated...
May 25, 2017: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/28545396/transcriptomic-resources-for-the-medicinal-legume-mucuna-pruriens-de-novo-transcriptome-assembly-annotation-identification-and-validation-of-est-ssr-markers
#11
N Sathyanarayana, Ranjith Kumar Pittala, Pankaj Kumar Tripathi, Ratan Chopra, Heikham Russiachand Singh, Vikas Belamkar, Pardeep Kumar Bhardwaj, Jeff J Doyle, Ashley N Egan
BACKGROUND: The medicinal legume Mucuna pruriens (L.) DC. has attracted attention worldwide as a source of the anti-Parkinson's drug L-Dopa. It is also a popular green manure cover crop that offers many agronomic benefits including high protein content, nitrogen fixation and soil nutrients. The plant currently lacks genomic resources and there is limited knowledge on gene expression, metabolic pathways, and genetics of secondary metabolite production. Here, we present transcriptomic resources for M...
May 25, 2017: BMC Genomics
https://www.readbyqxmd.com/read/28545250/endophytic-bacteria-isolated-from-panax-ginseng-improves-ginsenoside-accumulation-in-adventitious-ginseng-root-culture
#12
Xiaolin Song, Hao Wu, Zhenhao Yin, Meilan Lian, Chengri Yin
Ginsenoside is the most important secondary metabolite of ginseng. Natural sources of wild ginseng have been overexploited. Although root culture could reduce the length of the growth cycle of ginseng, the number of ginsenosides is fewer and their contents are lower in adventitious roots of ginseng than that in ginseng cultivated in the field. In this study, we investigated the effects of endophytic bacterial elicitors on biomass and ginsenoside production in adventitious roots cultures of Panax ginseng. Endophyte LB 5-3 as an elicitor could increase biomass and ginsenoside accumulation in ginseng adventitious root culture...
May 23, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28544902/extraction-and-applications-of-cyanotoxins-and-other-cyanobacterial-secondary-metabolites
#13
REVIEW
Fatima Haque, Sara Banayan, Josephine Yee, Yi Wai Chiang
The rapid proliferation of cyanobacteria in bodies of water has caused cyanobacterial blooms, which have become an increasing cause of concern, largely due to the presence of toxic secondary metabolites (or cyanotoxins). Cyanotoxins are the toxins produced by cyanobacteria that may be harmful to surrounding wildlife. They include hepatotoxins, neurotoxins and dermatotoxins, and are classified based on the organs they affect. There are also non-toxic secondary metabolites that include chelators and UV-absorbing compounds...
May 18, 2017: Chemosphere
https://www.readbyqxmd.com/read/28544789/determinants-of-recent-aflatoxin-exposure-among-pregnant-women-in-rural-zimbabwe
#14
Laura E Smith, Mduduzi N N Mbuya, Andrew J Prendergast, Paul C Turner, Sandra Ruboko, Jean H Humphrey, Rebecca J Nelson, Ancikaria Chigumira, George Kembo, Rebecca J Stoltzfus
SCOPE: Aflatoxins are toxic secondary metabolites of Aspergillus species that contaminate staple foods such as maize and groundnuts. Aflatoxin exposure during pregnancy has been associated with adverse birth outcomes in limited-scale surveys in sub-Saharan Africa. The objective of this study was to describe the determinants of aflatoxin exposure, using urinary aflatoxin M1 (AFM1) biomarkers and data generated by the Sanitation Hygiene Infant Nutrition Efficacy (SHINE) trial for rural Zimbabwean women in early pregnancy...
May 22, 2017: Molecular Nutrition & Food Research
https://www.readbyqxmd.com/read/28543536/cyanobacteria-as-efficient-producers-of-mycosporine-like-amino-acids
#15
REVIEW
Shikha Jain, Ganshyam Prajapat, Mustari Abrar, Lalita Ledwani, Anoop Singh, Akhil Agrawal
Mycosporine-like amino acids are the most common group of transparent ultraviolet radiation absorbing intracellular secondary metabolites. These molecules absorb light in the range of ultraviolet-A and -B with a maximum absorbance between 310 and 362 nm. Cyanobacteria might have faced the most deleterious ultraviolet radiation, which leads to an evolution of ultraviolet protecting mycosporine-like amino acids for efficient selection in the environment. In the last 30 years, scientists have investigated various cyanobacteria for novel mycosporine-like amino acids, applying different induction techniques...
May 22, 2017: Journal of Basic Microbiology
https://www.readbyqxmd.com/read/28541054/review-of-teas-cocoa-and-coffee-plant-secondary-metabolites-and-health-teas-cocoa-and-coffee-plant-secondary-metabolites-and-health-edited-by-alan-crozier-hiroshi-ashihara-and-francisco-tom%C3%A3-s-barb%C3%A3-ran-john-wiley-sons-ltd-west-sussex-uk-2011-x-252-pp-228-18
#16
https://www.readbyqxmd.com/read/28540497/large-scale-transcriptome-analysis-reveals-arabidopsis-metabolic-pathways-are-frequently-influenced-by-different-pathogens
#17
Zhenhong Jiang, Fei He, Ziding Zhang
Through large-scale transcriptional data analyses, we highlighted the importance of plant metabolism in plant immunity and identified 26 metabolic pathways that were frequently influenced by the infection of 14 different pathogens. Reprogramming of plant metabolism is a common phenomenon in plant defense responses. Currently, a large number of transcriptional profiles of infected tissues in Arabidopsis (Arabidopsis thaliana) have been deposited in public databases, which provides a great opportunity to understand the expression patterns of metabolic pathways during plant defense responses at the systems level...
May 24, 2017: Plant Molecular Biology
https://www.readbyqxmd.com/read/28539727/bioassay-guided-isolation-and-identification-of-antioxidant-flavonoids-from-cyclotrichium-origanifolium-labill-manden-and-scheng
#18
Abdussamat Guzel, Huseyin Aksit, Mahfuz Elmastas, Ramazan Erenler
BACKGROUND: Medicinal and aromatic plants play a significant role in drug discovery and development process. Flavonoids, revealing a wide spectrum of biological activities, extensively found in plants are important secondary metabolites. MATERIALS AND METHODS: Aerial parts of Cyclotrichium origanifolium were collected, dried, and boiled in water then extracted with hexane, ethyl acetate, and n-butanol. Total phenolic content, DPPH(•) scavenging activity, reducing power (FRAP) activity, and ABTS(•+) scavenging activity assays were applied for all extracts...
April 2017: Pharmacognosy Magazine
https://www.readbyqxmd.com/read/28539725/inhibition-of-cytochrome-p450-cyp3a4-activity-by-extracts-from-57-plants-used-in-traditional-chinese-medicine-tcm
#19
Mohamed L Ashour, Fadia S Youssef, Haidy A Gad, Michael Wink
BACKGROUND: Herbal medicine is widely used all over the world for treating various health disorders. It is employed either alone or in combination with synthetic drugs or plants to be more effective. OBJECTIVE: The assessment of the effect of both water and methanol extracts of 57 widely used plants from Traditional Chinese Medicine (TCM) against the main phase I metabolizing enzyme CYP3A4 in vitro for the first time. MATERIALS AND METHODS: The inhibition of cytochrome P450 activity was evaluated using a luminescence assay...
April 2017: Pharmacognosy Magazine
https://www.readbyqxmd.com/read/28539720/comparison-of-ultrasound-assisted-extraction-and-dynamic-maceration-over-content-of-tagitinin-c-obtained-from-tithonia-diversifolia-hemsl-a-gray-leaves-using-factorial-design
#20
Aline M R Silva, Nayara L O Ferreira, Anselmo E Oliveira, Leonardo L Borges, Edemilson C Conceição
BACKGROUND: Tithonia diversifolia belongs to the Asteraceae family. The leaves of T. diversifolia have been studied lately because of the presence of tagitinin C. OBJECTIVE: Looking for an easy and inexpensive method to extract tagitinin C from T. diversifolia leaves, this work aims to conduct a screening to evaluate the influence of different experimental factors using the dynamic maceration and ultrasound-assisted extraction methods with 2(3) factorial design based on response surface methodology in enhancing this chemical marker extraction...
April 2017: Pharmacognosy Magazine
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