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Phytochemical Analysis: PCA

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https://www.readbyqxmd.com/read/29044771/alkaloids-of-amaryllidaceae-as-inhibitors-of-cholinesterases-aches-and-bches-an-integrated-bioguided-study
#1
Natalie Cortes, Karina Sierra, Fernando Alzate, Edison H Osorio, Edison Osorio
INTRODUCTION: Enzymatic inhibition of acetylcholinesterase (AChE) is an essential therapeutic target for the treatment of Alzheimer's disease (AD) and AChE inhibitors are the first-line drugs for it treatment. However, butyrylcholinesterase (BChE), contributes critically to cholinergic dysfunction associated with AD. Thus, the development of novel therapeutics may involve the inhibition of both cholinesterase enzymes. OBJECTIVE: To evaluate, in an integrated bioguided study, cholinesterases alkaloidal inhibitors of Amaryllidaceae species...
October 17, 2017: Phytochemical Analysis: PCA
https://www.readbyqxmd.com/read/28990237/dereplication-by-hplc-dad-esi-ms-ms-and-screening-for-biological-activities-of-byrsonima-species-malpighiaceae
#2
Karina Fraige, Alessandra Cristina Dametto, Maria Luiza Zeraik, Larissa de Freitas, Amanda Correia Saraiva, Alexandra Ivo Medeiros, Ian Castro-Gamboa, Alberto José Cavalheiro, Dulce Helena S Silva, Norberto Peporine Lopes, Vanderlan S Bolzani
INTRODUCTION: Byrsonima species have been used in the treatment of gastrointestinal and gynecological inflammations, skin infections and snakebites. Based on their biological activities, it is important to study other organisms from this genus and to identify their metabolites. OBJECTIVES: To determine the metabolic fingerprinting of methanol and ethyl acetate extracts of four Byrsonima species (B. intermedia, B. coccolobifolia, B. verbascifolia and B. sericea) by HPLC-DAD-ESI-MS/MS and evaluate their in vitro antioxidant, anti-glycation, anti-inflammatory and cytotoxic activities...
October 9, 2017: Phytochemical Analysis: PCA
https://www.readbyqxmd.com/read/28983983/flavonoid-constituents-of-phlomis-lamiaceae-species-using-liquid-chromatography-mass-spectrometry
#3
Fatemeh Aghakhani, Navaz Kharazin, Zahra Lori Gooini
INTRODUCTION: Phlomis is one of the medicinal genera of Lamiaceae. This genus has unique medicinal properties. Consequently, appropriate methods need to be described for the identification of the chemical compounds. OBJECTIVE: A liquid chromatography tandem mass spectrometry (LC-MS/MS) technique on a triple quadrupole mass spectrometer (TQMS) was used for separation and identification of leaf flavonoid compounds for seven Phlomis species including Phlomis kurdia, Ph...
October 5, 2017: Phytochemical Analysis: PCA
https://www.readbyqxmd.com/read/28925005/simultaneous-qualitative-and-quantitative-analyses-of-triterpenoids-in-ilex-pubescens-by-ultra-high-performance-liquid-chromatography-coupled-with-quadrupole-time-of-flight-mass-spectrometry
#4
Di Cao, Qing Wang, Jing Jin, Maosong Qiu, Lian Zhou, Xinghong Zhou, Hui Li, Zhongxiang Zhao
INTRODUCTION: Ilex pubescens Hook et Arn mainly contains triterpenoids that possess antithrombotic, anti-inflammatory and analgesic effects. Quantitative and qualitative analyses of the triterpenoids in I. pubescens can be useful for determining the authenticity and quality of raw materials and guiding its clinical preparation. OBJECTIVES: To establish a method for rapid and comprehensive analysis of triterpenoids in I. pubescens using ultra-high-performance liquid chromatography coupled to electrospray ionisation and quadrupole time-of-flight-mass spectrometry (UPLC-ESI-QTOF-MS), which will also be applied to evaluate the contents of nine triterpenoids among root, root heartwood and root bark of I...
September 18, 2017: Phytochemical Analysis: PCA
https://www.readbyqxmd.com/read/28915313/a-metabolomic-approach-applied-to-a-liquid-chromatography-coupled-to-high-resolution-tandem-mass-spectrometry-method-hplc-esi-hrms-ms-towards-the-comprehensive-evaluation-of-the-chemical-composition-of-cannabis-medicinal-extracts
#5
Cinzia Citti, Umberto Maria Battisti, Daniela Braghiroli, Giuseppe Ciccarella, Martin Schmid, Maria Angela Vandelli, Giuseppe Cannazza
INTRODUCTION: Cannabis sativa L. is a powerful medicinal plant and its use has recently increased for the treatment of several pathologies. Nonetheless, side effects, like dizziness and hallucinations, and long-term effects concerning memory and cognition, can occur. Most alarming is the lack of a standardised procedure to extract medicinal cannabis. Indeed, each galenical preparation has an unknown chemical composition in terms of cannabinoids and other active principles that depends on the extraction procedure...
September 15, 2017: Phytochemical Analysis: PCA
https://www.readbyqxmd.com/read/28906059/benefits-and-limitations-of-dna-barcoding-and-metabarcoding-in-herbal-product-authentication
#6
REVIEW
Ancuta Cristina Raclariu, Michael Heinrich, Mihael Cristin Ichim, Hugo de Boer
INTRODUCTION: Herbal medicines play an important role globally in the health care sector and in industrialised countries they are often considered as an alternative to mono-substance medicines. Current quality and authentication assessment methods rely mainly on morphology and analytical phytochemistry-based methods detailed in pharmacopoeias. Herbal products however are often highly processed with numerous ingredients, and even if these analytical methods are accurate for quality control of specific lead or marker compounds, they are of limited suitability for the authentication of biological ingredients...
September 14, 2017: Phytochemical Analysis: PCA
https://www.readbyqxmd.com/read/28895264/phenolic-compound-diversity-explored-in-the-context-of-photo-oxidative-stress-protection
#7
Kristóf Csepregi, Éva Hideg
INTRODUCTION: Phenolic compounds are a chemically diverse group of plant secondary metabolites with important roles both in plant stress defence and human nutrition. OBJECTIVE: To explore structure-function relations potentiating phenolic compounds to promote leaf acclimation to light stress by excess photosynthetically active radiation (photoinhibition) and by solar ultraviolet (UV) radiation. METHODOLOGY: We report singlet oxygen and hydrogen peroxide antioxidant capacities and UV-absorbing properties of 27 flavonoids and 11 phenolic acids...
September 12, 2017: Phytochemical Analysis: PCA
https://www.readbyqxmd.com/read/28895238/the-use-of-1-h-nmr-metabolomics-to-optimise-the-extraction-and-preliminary-identification-of-anthelmintic-products-from-the-leaves-of-lysiloma-latisiliquum
#8
Gloria Ivonne Hernández-Bolio, Erika Kutzner, Wolfgang Eisenreich, Juan Felipe de Jesús Torres-Acosta, Luis Manuel Peña-Rodríguez
INTRODUCTION: Tannin-rich forages are recognised as an important alternative for the control of gastrointestinal nematodes in small ruminants. Lysiloma latisiliquum, a forage commonly consumed by goats and sheep, has shown anthelmintic activity when tested against Haemonchus contortus. However, to date, the metabolites responsible for the activity are not known. OBJECTIVE: To use (1) H-NMR metabolomics in the extraction and identification of anthelmintic metabolites from L...
September 12, 2017: Phytochemical Analysis: PCA
https://www.readbyqxmd.com/read/28895237/a-comprehensive-characterisation-of-rosemary-tea-obtained-from-rosmarinus-officinalis-l-collected-in-a-sub-humid-area-of-tunisia
#9
Mariem Achour, Raquel Mateos, Maha Ben Fredj, Ali Mtiraoui, Laura Bravo, Saad Saguem
INTRODUCTION: Rosemary (Rosmarinus officinalis L.) is an aromatic plant common in Tunisia and it is widely consumed as a tea in traditional cuisine and in folk medicine to treat various illnesses. Currently, most research efforts have been focused on rosemary essential oil, alcoholic and aqueous extracts, however, little is reported on rosemary infusion composition. OBJECTIVE: To investigate compounds present in rosemary tea obtained from Rosmarinus officinalis L...
September 12, 2017: Phytochemical Analysis: PCA
https://www.readbyqxmd.com/read/28895235/infrared-assisted-extraction-and-hplc-analysis-of-prunus-armeniaca-l-pomace-and-detoxified-kernel-and-their-antidiabetic-effects
#10
Karim Raafat, Nada El-Darra, Fatima A Saleh, Hiba N Rajha, Richard G Maroun, Nicolas Louka
INTRODUCTION: Prunus armeniaca L. (P. armeniaca) is one of the medicinal plants with a high safety-profile. OBJECTIVES: The aim of this work was to make an infrared-assisted extraction (IR-AE) of P. armeniaca fruit (pomace) and kernel, and analyse them using reverse phase high-performance liquid chromatography (RP-HPLC) aided method. METHODS: IR-AE is a novel-technique aimed at increasing the extraction-efficiency. The antidiabetic-potentials of the P...
September 12, 2017: Phytochemical Analysis: PCA
https://www.readbyqxmd.com/read/28895217/determination-of-tanshinones-in-danshen-salvia-miltiorrhiza-by-high-performance-liquid-chromatography-with-fluorescence-detection-after-pre-column-derivatisation
#11
Naoya Kishikawa, Akiko Yamanouchi, Mahmoud Hamed El-Maghrabey, Kaname Ohyama, Naotaka Kuroda
INTRODUCTION: Tanshinones are a major class of bioactive ingredients in the traditional herbal medicines, Danshen (Salvia miltiorrhiza). A sensitive and reliable determination method for tanshinones is useful to ensure the quality of Danshen. OBJECTIVE: To develop a sensitive and selective analytical method for tanshinones by high-performance liquid chromatography (HPLC) with fluorescence detection after pre-column derivatisation. METHODOLOGY: The proposed method depends on derivatisation reaction of tanshinones with 4-carbomethoxybenzaldehyde and ammonium acetate forming intensely fluorescent imidazole derivative...
September 12, 2017: Phytochemical Analysis: PCA
https://www.readbyqxmd.com/read/28895216/metabolic-alterations-in-two-cirsium-species-identified-at-distinct-phenological-stages-using-uplc-qtof-ms
#12
Min-Sun Kim, Miso Nam, Geum-Sook Hwang
INTRODUCTION: Cirsium chanroenicum and C. setidens are commonly used both in traditional folk medicine and as a food source. The quality of different species of Cirsium at different harvest times is a function of their metabolite composition, which is determined by the phenological stage. OBJECTIVE: We sought to determine the differences in the metabolite composition of two species of Cirsium during different phenological stages using ultra-performance liquid chromatography (UPLC) quadrupole time-of-flight (QTOF) mass spectrometry (MS)...
September 12, 2017: Phytochemical Analysis: PCA
https://www.readbyqxmd.com/read/28895207/structural-characterisation-of-alkaloids-in-leaves-and-roots-of-stephania-kwangsiensis-by-lc-qtof-ms
#13
Yan Shangguan, Jiayong He, Yun Kang, Yaqin Wang, Ping Yang, Jixian Guo, Jianming Huang
INTRODUCTION: The tuberous roots of Stephania kwangsiensis, which contain bioactive alkaloids, are used as a traditional Chinese medicine. Overexploitation of the roots has made the plant increasingly rare, and the abundant leaves of the same plant may offer a potential alternative. However, there is insufficient phytochemical information for a comparison of alkaloid compositions in the two parts. OBJECTIVE: To characterise and compare the alkaloids in the leaves and roots of S...
September 12, 2017: Phytochemical Analysis: PCA
https://www.readbyqxmd.com/read/28881407/quantification-of-akba-in-boswellia-sacra-using-nirs-coupled-with-plsr-as-an-alternative-method-and-cross-validation-by-hplc
#14
Najeeb Ur Rehman, Liaqat Ali, Ahmed Al-Harrasi, Fazal Mabood, Muhammed Al-Broumi, Abdul Latif Khan, Hidayat Hussain, Javid Hussain, René Csuk
INTRODUCTION: 3-O-Acetyl-11-keto-β-boswellic acid (AKBA), one of the pentacyclic triterpenoids, is the main biologically active constituent in the resin of Boswellia sacra and has received significant pharmacological interest in recent years. OBJECTIVE: It was aimed to develop a robust method to quantify the AKBA content in methanolic extracts of different parts of B. sacra plants and in various fractions of its resin exudates through near-infrared spectroscopy (NIRS) coupled with partial least squares regression (PLSR)...
September 7, 2017: Phytochemical Analysis: PCA
https://www.readbyqxmd.com/read/28877378/the-spatial-distribution-of-alkaloids-in-psychotria-prunifolia-kunth-steyerm-and-palicourea-coriacea-cham-k-schum-leaves-analysed-by-desorption-electrospray-ionisation-mass-spectrometry-imaging
#15
Lucilia Kato, Aline Pereira Moraes, Cecília Maria Alves de Oliveira, Boniek Gontijo Vaz, Letícia de Almeida Gonçalves, Elienai Cândida E Silva, Christian Janfelt
INTRODUCTION: Species of the genera Psychotria and Palicourea are sources of indole alkaloids, however, the distribution of alkaloids within the plants is not known. Analysing the spatial distribution using desorption electrospray ionisation mass spectrometry imaging (DESI-MSI) has become attractive due to its simplicity and high selectivity compared to traditional histochemical techniques. OBJECTIVES: To apply DESI-MSI to visualise the alkaloid distribution on the leaf surface of Psychotria prunifolia and Palicourea coriacea and to compare the distributions with HPLC-MS and histochemical analyses...
September 6, 2017: Phytochemical Analysis: PCA
https://www.readbyqxmd.com/read/28851101/validated-method-for-strigolactone-quantification-by-ultra-high-performance-liquid-chromatography-electrospray-ionisation-tandem-mass-spectrometry-using-novel-deuterium-labelled-standards
#16
Stéphanie Boutet-Mercey, François Perreau, Amélie Roux, Guillaume Clavé, Jean-Paul Pillot, Isabelle Schmitz-Afonso, David Touboul, Grégory Mouille, Catherine Rameau, François-Didier Boyer
INTRODUCTION: Strigolactones (SLs) are important plant hormones. They are difficult to analyse because they occur in very small concentrations especially in comparison with other plant hormones and other substances can interfere with their detection. OBJECTIVE: To develop a procedure for the extraction, purification and quantification of SLs from plant roots. METHODOLOGY: Samples were prepared by extraction of plant root tissues with ethyl acetate...
August 29, 2017: Phytochemical Analysis: PCA
https://www.readbyqxmd.com/read/28836707/quantification-of-the-pyrrolizidine-alkaloid-jacobine-in-crassocephalum-crepidioides-by-cation-exchange-high-performance-liquid-chromatography
#17
Wilfried Rozhon, Lukas Kammermeier, Sebastian Schramm, Nayeem Towfique, N Adebimpe Adedeji, S Adesola Ajayi, Brigitte Poppenberger
INTRODUCTION: Pyrrolizidine alkaloids (PAs) are secondary plant metabolites with considerable hepatoxic, tumorigenic and genotoxic potential. For separation, reversed phase chromatography is commonly used because of its excellent compatibility with detection by mass spectrometry. However, reversed phase chromatography has a low selectivity for PAs. OBJECTIVE: The objective of this work was to investigate the suitability of cation exchange chromatography for separation of PAs and to develop a rapid method for quantification of jacobine in Crassocephalum crepidioides that is suitable for analysis of huge sample numbers as required for mutant screening procedures...
August 24, 2017: Phytochemical Analysis: PCA
https://www.readbyqxmd.com/read/28786149/quantitative-analysis-of-ingenol-in-euphorbia-species-via-validated-isotope-dilution-ultra-high-performance-liquid-chromatography-tandem-mass-spectrometry
#18
Tibor Béres, Klaus Dragull, Jiří Pospíšil, Danuše Tarkowská, Martin Dančák, Ondřej Bíba, Petr Tarkowski, Karel Doležal, Miroslav Strnad
INTRODUCTION: Various species of the Euphorbia genus contain diterpene ingenol and ingenol mebutate (ingenol-3-angelate), a substance found in the sap of the plant Euphorbia peplus and an inducer of cell death. A gel formulation of the drug has been approved by the US Food and Drug Administration (FDA) and the European Medicines Agency (EMA) for the topical treatment of actinic keratosis. OBJECTIVE: To develop a rapid and reliable method for quantification of ingenol in various plant extracts...
August 7, 2017: Phytochemical Analysis: PCA
https://www.readbyqxmd.com/read/28776774/identification-of-some-bioactive-metabolites-in-a-fractionated-methanol-extract-from-ipomoea-aquatica-aerial-parts-through-tlc-hplc-uplc-esi-qtof-ms-and-lc-spe-nmr-fingerprints-analyses
#19
Mahmoud Hefny Gad, Emmy Tuenter, Nagwa El-Sawi, Sabry Younes, El-Mewafy El-Ghadban, Kristiaan Demeyer, Luc Pieters, Yvan Vander Heyden, Debby Mangelings
INTRODUCTION: The plant species Ipomoea aquatica contains various bioactive constituents, e.g. phenols and flavonoids, which have several medical uses. All previous studies were executed in Asia; however, no reports are available from Africa, and the secondary metabolites of this plant species from Africa are still unknown. OBJECTIVE: The present study aims finding suitable conditions to identify the bioactive compounds from different fractions. METHODOLOGY: Chromatographic fingerprint profiles of different fractions were developed using high-performance liquid chromatography (HPLC) and then these conditions were transferred to thin-layer chromatography (TLC)...
August 4, 2017: Phytochemical Analysis: PCA
https://www.readbyqxmd.com/read/28766842/methanol-extracts-of-28-hieracium-species-from-the-balkan-peninsula-comparative-lc-ms-analysis-chemosystematic-evaluation-of-their-flavonoid-and-phenolic-acid-profiles-and-antioxidant-potentials
#20
Violeta Milutinović, Marjan Niketić, Ljuboš Ušjak, Dejan Nikolić, Aleksej Krunić, Christian Zidorn, Silvana Petrović
INTRODUCTION: Hieracium s. str. represents one of the largest and most complex genera of flowering plants. As molecular genetics seems unlikely to disentangle intricate relationships within this reticulate species complex, analysis of flavonoids and phenolic acids, known as good chemosystematic markers, promise to be more reliable. Data about pharmacological activity of Hieracium species are scarce. OBJECTIVE: Evaluation of the chemosystematic significance of flavonoids and phenolic acids of methanol extracts of aerial flowering parts of 28 Hieracium species from the Balkans...
August 2, 2017: Phytochemical Analysis: PCA
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