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Natural Product Research

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https://www.readbyqxmd.com/read/29034745/withanolide-production-by-fungal-endophyte-isolated-from-withania-somnifera
#1
Muthukrishnan Sathiyabama, Ramalingam Parthasarathy
Withanolides, the secondary metabolite from Withania species is used in Ayurvedic medicine and now proved to have potential use in treating cardiovascular, Alzheimer's disease, etc. Its production in plants varies between genotypes with very low yield. For improved industrial commercialisation, there is a need to increase its production. Endophytic fungi are symbiotically associated with plants and can synthesise the same bioactive compounds and natural products as their host plant. There are no reports available on withanolide-producing (endophytic) fungi...
October 16, 2017: Natural Product Research
https://www.readbyqxmd.com/read/29034743/iloneoside-a-cytotoxic-ditigloylated-pregnane-glycoside-from-the-leaves-of-gongronema-latifolium-benth
#2
Gideon Ampoma Gyebi, Joseph Oluwatope Adebayo, Olufunke Esan Olorundare, Antoni Pardede, Masayuki Ninomiya, Afolabi Olanrewaju Saheed, Abiola Samuel Babatunde, Mamoru Koketsu
Gongronema latifolium Benth (Asclepiadaceae) is an edible-green-leafy vegetable with known medicinal value. A chemical investigation of the 80% methanolic extract of the leaves led to the isolation of a new pregnane glycoside: iloneoside (3-O-[6-deoxy-3-O-methyl-β-D-allopyranosyl-(1→14)-β-D-oleandropyranosyl]-11,12-di-O-tigloyl-17β-marsdenin), together with four known constituents. Their chemical structures were determined by spectroscopic analysis. The isolates were tested for their in vitro growth inhibitory activity against human leukemia HL-60 cells...
October 16, 2017: Natural Product Research
https://www.readbyqxmd.com/read/29034741/anti-inflammatory-effect-of-methanolic-extract-of-gmelina-arborea-bark-and-its-fractions-against-carrageenan-induced-paw-oedema-in-rats
#3
Sarabjit Kaur, Preet Mohinder Singh Bedi, Navreet Kaur
Gmelina arborea has been traditionally used for treatment of abdominal pain, burning sensation and as stomachic. The anti-inflammatory effect of aqueous and methanol extract of this plant has been studied but detailed investigations on anti-inflammatory activity of G. arborea stem bark are still not available. Therefore, the present study was designed to evaluate the anti-inflammatory activity of methanol extract and its fractions using carrageenan induced paw oedema model. Methanol extract at the dose of 500 mg/kg and its ethyl acetate fraction at 50 mg/kg showed significant reduction in paw oedema in comparison with standard drug...
October 16, 2017: Natural Product Research
https://www.readbyqxmd.com/read/29034737/anti-allergic-inflammatory-effect-of-vanillic-acid-through-regulating-thymic-stromal-lymphopoietin-secretion-from-activated-mast-cells
#4
Hyun-Ja Jeong, Sun-Young Nam, Hee-Yun Kim, Mu Hyun Jin, Mi Hye Kim, Seok Seon Roh, Hyung-Min Kim
Vanillic acid, which is well known as a benzoic acid derivative, has been used as a flavouring agent. Currently, we ascertained the therapeutic potential action of vanillic acid on allergic inflammatory reaction in human mast cell line, HMC-1. Treatment with vanillic acid resulted in a significant decrease in levels of thymic stromal lymphopoietin and pro-inflammatory cytokines compared to phorbol 12-myristate 13-acetate and calcium ionophore A23187 (PMACI)-treated HMC-1 cells. In PMACI-stimulated cells, treatment with vanillic acid also dramatically inhibited activities of caspase-1 and nuclear factor-kB (p65)...
October 16, 2017: Natural Product Research
https://www.readbyqxmd.com/read/29034738/chemodiversity-of-nepeta-menthoides-boiss-bohse-essential-oil-from-iran-and-antimicrobial-acetylcholinesterase-inhibitory-and-cytotoxic-properties-of-1-8-cineole-chemotype
#5
Niloofar Kahkeshani, Abbas Hadjiakhoondi, Latifeh Navidpour, Tahmineh Akbarzadeh, Malihe Safavi, Elahe Karimpour-Razkenari, Mahnaz Khanavi
The essential oil of Nepeta menthoides Boiss. & Bohse., from Iran, was analysed by GC/MS. Two types of multivariate analyses were done based on the chemical composition of the investigated sample in this study and 12 other samples reported in the literature to show the chemodiversity in essential oil composition. Antimicrobial, acetylcholinesterase inhibitory and cytotoxic activities of the essential oil and its major component were assessed. Twenty-one compounds were identified, representing 96.81% of the total oil and the major constituent was 1,8-cineole (70...
October 15, 2017: Natural Product Research
https://www.readbyqxmd.com/read/29027475/antimould-microbial-and-plant-metabolites-with-potential-use-in-intelligent-food-packaging
#6
Francesca Valerio, Marco Masi, Alessio Cimmino, Seyed Arash Moeini, Paola Lavermicocca, Antonio Evidente
Moulds food infestation is a heavy dangerous problem for human health and also could generate heavy economic losses. The intelligent packaging using eco-friendly biodegradable biofilm incorporating bioactive natural safe compounds represents a new frontier. This manuscript reports the inhibitory activity of 12 bacterial, fungal and plant metabolites against Penicillium roqueforti and Aspergillus niger. Among them α-costic acid and ungeremine (3 and 12) are the most promising as potential biofungicide against both fungal strains...
October 13, 2017: Natural Product Research
https://www.readbyqxmd.com/read/29027474/on-the-metabolites-produced-by-colletotrichum-gloeosporioides-a-fungus-proposed-for-the-ambrosia-artemisiifolia-biocontrol-spectroscopic-data-and-absolute-configuration-assignment-of-colletochlorin-a
#7
Marco Masi, Maria Chiara Zonno, Alessio Cimmino, Pierluigi Reveglia, Alexander Berestetskiy, Angela Boari, Maurizio Vurro, Antonio Evidente
Ambrosia artemisiifolia L. is responsible for serious allergies induced on humans. Different approaches for its control were proposed during the COST Action FA1203 "Sustainable management of Ambrosia artemisiifolia in Europe" (SMARTER). Fungal secondary metabolites often show potential herbicidal activity. Three phytotoxins were purified from the fungal culture filtrates of Colletotrichum gloeosporioides, isolated from infected leaves of A. artemisiifolia. They were identified by spectroscopic and chemical methods as colletochlorin A, orcinol and tyrosol (1, 2 and 3)...
October 13, 2017: Natural Product Research
https://www.readbyqxmd.com/read/29022767/%C3%AE-glucosidase-inhibitory-and-cytotoxic-botryorhodines-from-mangrove-endophytic-fungus-trichoderma-sp-307
#8
Liuhong Zhang, Shah Iram Niaz, Zhen Wang, Yonghong Zhu, Yongcheng Lin, Jing Li, Lan Liu
One new depsidone, botryorhodine H (1), together with three known analogues, botryorhodines C, D and G (2-4), were obtained from the mangrove endophytic fungus Trichoderma sp. 307 by co-culturing with Acinetobacter johnsonii B2. Structures were determined by 1D and 2D NMR analyses and high-resolution mass spectrum. Compounds 1-3 showed α-glucosidase inhibitory activity with IC50 ranging from 8.1 to 11.2 μM, and compound 1 exhibited potent cytotoxicity against rat prolactinoma MMQ and rat pituitary adenoma GH3 cell lines (IC50 = 3...
October 12, 2017: Natural Product Research
https://www.readbyqxmd.com/read/29022760/terpenoids-from-the-barks-of-magnolia-maudiae-dunn-figlar
#9
Sui Xianjin, Shi Sha, Muge Qi, Zhengxi Zhang, Yuyao Yang, Haibo Wu, Linfeng Li, Wenshu Wang, Anmin Huang
A new germacrenolide (1) and fourteen known terpenoids (2-15) were isolated from the barks of Magnolia maudiae (Dunn) Figlar (Magnoliaceae). The structure of (7αH,11βH)-2α,8α-dihydroxy-4α,5β-epoxy-germacr-1(10)-en-6α,12-olide (1) was elucidated by physical and spectroscopic data analysis, including 1D, 2D NMR and HR-ESI-MS. Lyratol F (9) was isolated from Magnolia for the first time. The structures of known compounds were established by comparing their spectroscopic data with those in literatures.
October 12, 2017: Natural Product Research
https://www.readbyqxmd.com/read/29022744/a-new-lactam-alkaloid-from-portulaca-oleracea-l-and-its-cytotoxity
#10
Chengcheng Zhao, Zheming Ying, Xiaojun Tao, Mingyue Jiang, Xixiang Ying, Guanlin Yang
A new lactam alkaloid named oleraciamide D (1), indentified as (5R)-4-(3-methoxy-4-hydroxyphenyl)-5-(4-hydroxyphenyl)-5,6-dihydropyridin-2(1H)-one, together with five known compounds, indole-3-aldehyde (2), portulacatone (3), N-trans-feruloyloctopamine (4), N-trans-feruloyl-3'-O-methyldopamine (5) and N-trans-feruloyltyramine (6) were isolated from Potulaca oleracea L. Among them, indole-3-aldehyde (2) was isolated from the medicine for the first time. The structure of the new alkaloid was elucidated via UHPLC-ESI-Q-TOF/MS, 1D NMR and 2D NMR...
October 12, 2017: Natural Product Research
https://www.readbyqxmd.com/read/29022380/curcumin-or-bisdemethoxycurcumin-for-nose-to-brain-treatment-of-alzheimer-disease-a-bio-chemo-informatics-case-study
#11
Rania M Hathout, Sherweit H El-Ahmady, AbdelKader A Metwally
The current study introduces a new idea of utilising several bio/chemoinformatics tools in comparing two bio-similar natural molecules viz. curcumin and bisdemethoxycurcumin (BDMC) in order to select a potential nose-to-brain remedy for Alzheimer disease. The comparison comprised several bio/chemo informatics tools. It encompassed all levels starting from loading the drug in a certain carrier; PLGA nanoparticles, to the biopharmaceutical level investigating the interaction with mucin and inhibition of P-gp blood-brain barrier efflux pumps...
October 12, 2017: Natural Product Research
https://www.readbyqxmd.com/read/29022367/maleic-anhydride-and-chromone-derivatives-from-the-endophytic-fungus-bcc-54265-botryosphaeriaceae
#12
Masahiko Isaka, Somporn Palasarn, Sujinda Sommai, Pattiyaa Laksanacharoen, Kitlada Srichomthong
A maleic anhydride derivative, botryoanhydride (1), and a chromone derivative, botryochromone (2), together with three known chromones, eugenitin (3), 6-hydroxymethyleugenin (4) and 6-methoxymethyleugenin (5), were isolated from cultures of the endophytic fungus BCC 54265 of the family Botryosphaeriaceae. The structures were elucidated on the basis of NMR, HRMS and CD data. Compound 2 showed weak cytotoxic activity to cancer cell-lines.
October 12, 2017: Natural Product Research
https://www.readbyqxmd.com/read/29022365/detection-of-new-phenylpropanoids-from-dendrobium-chrysanthum
#13
Jinyan Cai, Chao Yang, Tianhong Chen, Lin Zhao
Herba Dendrobii has been documented in the Compendium of Materia Medica, with special efficacy in nourishing Yin and treating diabetes. However, the chemical profile of Dendrobium chrysanthum Lindl. has not been reported yet. The compositions were analysed with UPLC/Q-TOF-MS/MS. 53 compounds were tentatively characterised, and 14 compounds might be new compounds. Some novel lactones of poly-phenylpropanoids were firstly detected, and di-p-hydroxyphenylpropionic acidic p-coumaric acid lactone, a new compound of the first example, was obtained and identified...
October 12, 2017: Natural Product Research
https://www.readbyqxmd.com/read/29022361/interactions-of-quercetin-with-receptor-tyrosine-kinases-associated-with-human-lung-carcinoma
#14
Bincy Baby, Priya Antony, Ranjit Vijayan
Lung cancer is a deadly form of cancer with high morbidity and mortality rates. Deregulated receptor tyrosine kinases (RTKs) are frequently associated with the formation and development of lung carcinoma. Quercetin is a major dietary flavonoid that has been shown to induce cell growth inhibition and apoptosis in human lung cancer cell lines. In the current study, four major overexpressed RTKs - EGFR, FGFR1, IGF1R and c-Met - involved in human lung cancer were investigated. Molecular docking was employed to identify the binding orientation and inhibitory potential of quercetin in these RTKs...
October 12, 2017: Natural Product Research
https://www.readbyqxmd.com/read/29022360/new-pyridocarbazole-alkaloids-from-strychnos-nitida
#15
Wei Li, Gui-Hua Tang, Lin Chen, Ya-Qi Tang, You-Kai Xu, Bo Liu, Sheng Yin
Phytochemical investigation of Strychnos nitida has led to the isolation of three new racemic pyridocarbazole alkaloids, (±)-stritidas A-C (1-3) and three known monoterpenoid indole alkaloids (4-6). Compounds 2 and 3 represent the first examples of pyridocarbazole alkaloids featuring an N-2-hydroxyethyl moiety. Their structures were determined by combined spectroscopic data (MS, UV, IR and NMR) and chemical methods.
October 12, 2017: Natural Product Research
https://www.readbyqxmd.com/read/29022356/xylaropyrones-b-and-c-new-%C3%AE-pyrones-from-the-endophytic-fungus-xylaria-sp-sc1440
#16
Chenjia Guo, Ping Wu, Jinghua Xue, Hanxiang Li, Xiaoyi Wei
Two new γ-pyrones, xylaropyrones B (1) and C (2), together with three known compounds, xylaropyrone (3), annularin A (4) and annularin C (5), were isolated from solid cultures of the endophytic fungus Xylaria sp. SC1440. The structures of these compounds were determined mainly by analysis of their NMR spectroscopic data. The relative configurations of 1 and 2 were assigned on the basis of J-based configurational analysis, and the absolute configurations were established by experimental and TDDFT calculated ECD spectra...
October 12, 2017: Natural Product Research
https://www.readbyqxmd.com/read/29022354/three-new-isoflavones-from-the-pueraria-montana-var-lobata-willd-and-their-bioactivities
#17
Tinghui Cui, Shiyun Tang, Chunbo Liu, Zhenjie Li, Qin Zhu, Junheng You, Xiaoxi Si, Fengmei Zhang, Pei He, Zhihua Liu, Mingming Miao, Guangyu Yang, Qinpeng Shen, Lihong Jiang
Three new isoflavones, 7-acetyl-4',6-dimethoxy-isoflavone (1), 7-acetyl-4'-hydroxy-6-methoxy-isoflavone (2) and 7-acetyl-6,8-dimethoxy-4'-hydroxy-isoflavone (3), together with five known flavones (4-8), were isolated from the Pueraria montana var. lobata (Willd.). Their structures were elucidated by spectroscopic methods, including extensive 1D- and 2D NMR techniques. Compounds 1-8 were evaluated for their anti-tobacco mosaic virus (anti-TMV) activities. The results showed that compounds 1 and 2 exhibited high anti-TMV activities with inhibition rates of 36...
October 12, 2017: Natural Product Research
https://www.readbyqxmd.com/read/29022353/chemical-composition-and-in-vitro-antileishmanial-and-cytotoxic-activities-of-the-essential-oils-of-ocotea-dispersa-nees-mez-and-ocotea-odorifera-vell-rohwer-lauraceae
#18
Ana E T Alcoba, Daiana C de Melo, Priscila M de Andrade, Herbert J Dias, Mariana C Pagotti, Lizandra G Magalhães, Walnir G F Júnior, Antônio E M Crotti, Mayker L D Miranda
We investigate the chemical composition and the in vitro antileishmanial and cytotoxic activities of the essential oils extracted from the leaves of Ocotea dispersa (Nees) Mez (OD-EO) and Ocotea odorifera (Vell) Rohwer (OO-EO). On the basis of GC-FID and GC-MS, α-eudesmol (20.9%), valencene (10.2%), δ-elemene (9.3%) and isospathulenol (7.3%) are the major constituents of OD-EO, whereas safrole (36.3%), γ-cadinene (6.6%), camphor (6.5%) and α-copaene (6.0%) are the main constituents of OO-EO. Both OD-EO and OO-EO display significant activity against the promastigote forms of Leishmania amazonensis, with IC50 values of 4...
October 12, 2017: Natural Product Research
https://www.readbyqxmd.com/read/29017372/the-antidepressant-like-activity-of-ellagic-acid-and-its-effect-on-hippocampal-brain-derived-neurotrophic-factor-levels-in-mouse-depression-models
#19
Hatice Asli Bedel, Ceren Kencebay Manas, Gül Özbey, Coşkun Usta
The aim of present study was to evaluate the antidepressant-like activity of ellagic acid (EA) in mice-forced swim test (FST) and tail suspension test (TST) and the possible role of brain-derived neurotrophic factor (BDNF) in EA's antidepressant-like effect. We found that EA and sertraline did not affect the spontaneous locomotor activity of mice. EA produced statistically significant decrease in immobility time as compared to vehicle group in TST. EA at 1 and 5 mg/kg doses did not produce any significant effect in immobility time as compared to vehicle group in FST...
October 11, 2017: Natural Product Research
https://www.readbyqxmd.com/read/29017370/valorization-of-raw-materials-from-agricultural-industry-for-astaxanthin-and-%C3%AE-carotene-production-by-xanthophyllomyces-dendrorhous
#20
Teresa Gervasi, Vito Pellizzeri, Qada Benameur, Claudio Gervasi, Antonello Santini, Nicola Cicero, Giacomo Dugo
Waste deriving from food and agro-industries is a growing problem in our modern society. In order to reduce food waste and its associated impacts over the environment and public health, innovative strategies for the conversion of food wastes in added value products are studied. Whey is one of the prominent waste deriving from Sicilian diary industry. The growth and the carotenoid biosynthesis of the yeast Xanthophyllomyces dendrorhous by its cultivation in pre-treated whey were studied. The study showed the possibility of increasing the astaxanthin productivity from X...
October 11, 2017: Natural Product Research
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