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Glucoraphanin

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https://www.readbyqxmd.com/read/29149798/reconstructing-biosynthetic-pathway-of-the-plant-derived-cancer-chemopreventive-precursor-glucoraphanin-in-escherichia-coli
#1
Han Yang, Feixia Liu, Yin Li, Bo Yu
Epidemiological data confirmed a strong correlation between regular consumption of cruciferous vegetables and lower cancer risk. This cancer preventive property is mainly attributed to the glucosinolate products, such as glucoraphanin found in broccoli that is derived from methionine. Here we report the first successful reconstruction of the complete biosynthetic pathway of glucoraphanin from methionine in Escherichia coli via gene selection, pathway design, and protein engineering. We used branched-chain amino transferase 3 to catalyze two transamination steps to ensure the purity of precursor molecules and used cysteine as a sulfur donor to simplify the synthesis pathway...
November 17, 2017: ACS Synthetic Biology
https://www.readbyqxmd.com/read/29113068/uva-uvb-light-and-methyl-jasmonate-alone-or-combined-redirect-the-biosynthesis-of-glucosinolates-phenolics-carotenoids-and-chlorophylls-in-broccoli-sprouts
#2
Melissa Moreira-Rodríguez, Vimal Nair, Jorge Benavides, Luis Cisneros-Zevallos, Daniel A Jacobo-Velázquez
Broccoli sprouts contain health-promoting phytochemicals that can be enhanced by applying ultraviolet light (UV) or phytohormones. The separate and combined effects of methyl jasmonate (MJ), UVA, or UVB lights on glucosinolate, phenolic, carotenoid, and chlorophyll profiles were assessed in broccoli sprouts. Seven-day-old broccoli sprouts were exposed to UVA (9.47 W/m²) or UVB (7.16 W/m²) radiation for 120 min alone or in combination with a 25 µM MJ solution, also applied to sprouts without UV supplementation...
November 4, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29080462/effect-of-broccoli-sprouts-on-thyroid-function-haematological-biochemical-and-immunological-parameters-in-rats-with-thyroid-imbalance
#3
Paweł Paśko, Mirosław Krośniak, Ewelina Prochownik, Małgorzata Tyszka-Czochara, Maria Fołta, Renata Francik, Jakub Sikora, Mateusz Malinowski, Paweł Zagrodzki
Broccoli sprouts may exert a negative influence on thyroid function as they are a rich source of glucosinolates, in particular glucoraphanin. Under the study in a long-term experiment broccoli sprouts were tested as an element of rats diet, combined with deficient iodine, or sulfadimethoxine ingestion - two models of hypothyroidism. Evaluations were performed for serum TSH and thyroid hormones completed with analyzes of selected haematological, biochemical and immunological (IL-6, IL-10) parameters, as well as cytosolic glutathione peroxidase (GPX1), thioredoxin reductase (TR) in the thyroid, and plasma glutathione peroxidase (GPX3)...
October 25, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29058468/screening-and-identification-of-major-phytochemical-compounds-in-seeds-sprouts-and-leaves-of-tuscan-black-kale-brassica-oleracea-l-ssp-acephala-dc-var-sabellica-l
#4
Lucia Giorgetti, Gianluca Giorgi, Edoardo Cherubini, Pier Giovanni Gervasi, Clara Maria Della Croce, Vincenzo Longo, Lorenza Bellani
We report the spectrophotometric determination of total polyphenols, flavonoids, glucosinolates and antioxidant activity in seeds, seedlings and leaves of Tuscan black kale. The highest content of phytochemicals was observed in 10 days sprouts and antioxidant activity was maximum in 2, 4 days seedlings. Identification and characterisation of phytochemicals were performed by mass spectrometry (MS), high resolution and tandem MS with electrospray ionisation mode. Low-molecular-weight metabolites were evidenced in seeds while metabolites at high m/z range were detected in cotyledons and leaves...
October 23, 2017: Natural Product Research
https://www.readbyqxmd.com/read/28968493/enhancement-of-glucosinolate-and-isothiocyanate-profiles-in-brassicaceae-crops-addressing-challenges-in-breeding-for-cultivation-storage-and-consumer-related-traits
#5
Luke Bell, Carol Wagstaff
Glucosinolates (GSLs) and isothiocyanates (ITCs) produced by Brassicaceae plants are popular targets for analysis due to the health benefits associated with them. Breeders aim to increase the concentrations in commercial varieties; however, there are few examples of this. The most well-known is Beneforté broccoli, which has increased glucoraphanin/sulforaphane concentrations compared to those of conventional varieties. It was developed through traditional breeding methods with considerations for processing, consumption, and health made throughout this process...
October 20, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28945821/chemopreventive-glucosinolate-accumulation-in-various-broccoli-and-collard-tissues-microfluidic-based-targeted-transcriptomics-for-by-product-valorization
#6
Young-Sang Lee, Kang-Mo Ku, Talon M Becker, John A Juvik
Floret, leaf, and root tissues were harvested from broccoli and collard cultivars and extracted to determine their glucosinolate and hydrolysis product profiles using high performance liquid chromatography and gas chromotography. Quinone reductase inducing bioactivity, an estimate of anti-cancer chemopreventive potential, of the extracts was measured using a hepa1c1c7 murine cell line. Extracts from root tissues were significantly different from other tissues and contained high levels of gluconasturtiin and glucoerucin...
2017: PloS One
https://www.readbyqxmd.com/read/28885683/microwave-heating-modelling-of-a-green-smoothie-effects-on-glucoraphanin-sulforaphane-and-s-methyl-cysteine-sulphoxide-changes-during-storage
#7
Noelia Castillejo, Ginés Benito Martínez Hernández, Antonio José Lozano Guerrero, Juan Luis Pedreño Molina, Perla A Gómez, Encarna Aguayo, Francisco Artés, Francisco Artés Hernández
BACKGROUND: The heating of a green smoothie during an innovative semi-continuous microwave treatment (MW; 9 kW for 15 s) was modelled. Thermal and dielectric properties of the samples were previously determined. Furthermore, the heating effect on the main chemopreventive compounds of the smoothie and during its subsequent storage up to 30 days at 5 or 15 °C were studied. Such results were compared to conventional pasteurization (CP; 90 °C for 45 s) while unheated fresh blended samples were used as control (CTRL)...
September 8, 2017: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/28861220/the-ability-to-manipulate-plant-glucosinolates-and-nutrients-explains-the-better-performance-of-bemisia-tabaci-middle-east-asia-minor-1-than-mediterranean-on-cabbage-plants
#8
Hongying Cui, Litao Guo, Shaoli Wang, Wen Xie, Xiaoguo Jiao, Qingjun Wu, Youjun Zhang
The performance of herbivorous insects is greatly affected by host chemical defenses and nutritional quality. Some herbivores have developed the ability to manipulate plant defenses via signaling pathways. It is currently unclear, however, whether a herbivore can benefit by simultaneously reducing plant defenses and enhancing plant nutritional quality. Here, we show that the better performance of the whitefly Bemisia tabaci Middle East-Asia Minor 1 (MEAM1; formerly the "B" biotype) than Mediterranean (MED; formerly the "Q" biotype) on cabbage is associated with a suppression of glucosinolate (GS) content and an increase in amino acid supply in MEAM1-infested cabbage compared with MED-infested cabbage...
August 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28769953/glucosinolate-profiles-in-cabbage-genotypes-influence-the-preferential-feeding-of-diamondback-moth-plutella-xylostella
#9
Arif Hasan Khan Robin, Mohammad Rashed Hossain, Jong-In Park, Hye R Kim, Ill-Sup Nou
Diamondback moth (DBM), Plutella xylostella L., is a devastating pest of cabbage worldwide whose feeding attributes are influenced by glucosinolate profiles of the plant. Identifying the specific glucosinolates associated with plants' resistance mechanism can provide cues to novel points of intervention in developing resistant cultivars. We studied the DBM larval feeding preference and extent of damage on cabbage leaves via controlled glass-house and in vitro multiple- and two-choice feeding tests. These feeding attributes were associated with the individual glucosinolate profiles, analyzed by HPLC, of each of the eight cabbage genotypes using multivariate analytical approach to identify the glucosinolates that may have roles in resistance...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28694655/antioxidant-dietary-approach-in-treatment-of-fatty-liver-new-insights-and-updates
#10
REVIEW
Alessandra Ferramosca, Mariangela Di Giacomo, Vincenzo Zara
Non-alcoholic fatty liver disease (NAFLD) is a common clinicopathological condition, encompassing a range of conditions caused by lipid deposition within liver cells. To date, no approved drugs are available for the treatment of NAFLD, despite the fact that it represents a serious and growing clinical problem in the Western world. Identification of the molecular mechanisms leading to NAFLD-related fat accumulation, mitochondrial dysfunction and oxidative balance impairment facilitates the development of specific interventions aimed at preventing the progression of hepatic steatosis...
June 21, 2017: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/28690627/isothiocyanates-nitriles-and-epithionitriles-from-glucosinolates-are-affected-by-genotype-and-developmental-stage-in-brassica-oleracea-varieties
#11
Franziska S Hanschen, Monika Schreiner
Vegetables of the Brassica oleracea group, such as broccoli, cauliflower, and cabbage, play an important role for glucosinolate consumption in the human diet. Upon maceration of the vegetable tissue, glucosinolates are degraded enzymatically to form volatile isothiocyanates, nitriles, and epithionitriles. However, only the uptake of isothiocyanates is linked to the cancer-preventive effects. Thus, it is of great interest to evaluate especially the isothiocyanate formation. Here, we studied the formation of glucosinolates and their respective hydrolysis products in sprouts and fully developed vegetable heads of different genotypes of the five B...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28672860/uva-uvb-light-doses-and-harvesting-time-differentially-tailor-glucosinolate-and-phenolic-profiles-in-broccoli-sprouts
#12
Melissa Moreira-Rodríguez, Vimal Nair, Jorge Benavides, Luis Cisneros-Zevallos, Daniel A Jacobo-Velázquez
Broccoli sprouts contain health-promoting glucosinolate and phenolic compounds that can be enhanced by applying ultraviolet light (UV). Here, the effect of UVA or UVB radiation on glucosinolate and phenolic profiles was assessed in broccoli sprouts. Sprouts were exposed for 120 min to low intensity and high intensity UVA (UVAL, UVAH) or UVB (UVBL, UVBH) with UV intensity values of 3.16, 4.05, 2.28 and 3.34 W/m², respectively. Harvest occurred 2 or 24 h post-treatment; and methanol/water or ethanol/water (70%, v/v) extracts were prepared...
June 26, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28627624/pro-oxidant-activity-of-sulforaphane-and-cisplatin-potentiates-apoptosis-and-simultaneously-promotes-autophagy-in-malignant-mesothelioma-cells
#13
Yoon-Jin Lee, Sang-Han Lee
Sulforaphane (SFN) is an isothiocyanate compound derived from glucoraphanin, which is found in cruciferous vegetables, and has been heralded as a chemopreventive and/or chemotherapeutic agent. The present study investigated the effects of SFN on enhancing the anticancer role of cisplatin (cis-dichlorodiammineplatinum; CDDP) in H‑28 malignant mesothelioma cells. At concentrations demonstrating limited toxicity in MeT‑5A normal human mesothelial cells, combination treatment with the two compounds exhibited synergistic growth‑inhibiting and apoptosis‑promoting activities, as demonstrated by a series of proapoptotic events, including reactive oxygen species accumulation, loss of mitochondrial membrane potential, upregulation of p53 expression, increased B‑cell lymphoma 2 (Bcl‑2) associated X protein/Bcl‑2 ratio, activation of caspase‑3, the occurrence of a sub‑G0/G1 peak and an increase in cells with pyknotic and fragmented nuclei, Annexin V‑phycoerythrin‑positive staining and G2/M phase‑transition delay in the cell cycle...
August 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28531129/rapid-and-cost-effective-quantification-of-glucosinolates-and-total-phenolic-content-in-rocket-leaves-by-visible-near-infrared-spectroscopy
#14
Eva María Toledo-Martín, Rafael Font, Sara Obregón-Cano, Antonio De Haro-Bailón, Myriam Villatoro-Pulido, Mercedes Del Río-Celestino
The potential of visible-near infrared spectroscopy to predict glucosinolates and total phenolic content in rocket (Eruca vesicaria) leaves has been evaluated. Accessions of the E. vesicaria species were scanned by NIRS as ground leaf, and their reference values regressed against different spectral transformations by modified partial least squares (MPLS) regression. The coefficients of determination in the external validation (R²VAL) for the different quality components analyzed in rocket ranged from 0.59 to 0...
May 20, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28490075/development-of-a-near-infrared-spectroscopy-method-nirs-for-fast-analysis-of-total-indolic-aliphatic-and-individual-glucosinolates-in-new-bred-open-pollinating-genotypes-of-broccoli-brassica-oleracea-convar-botrytis-var-italica
#15
Samira Sahamishirazi, Sabine Zikeli, Michael Fleck, Wilhelm Claupein, Simone Graeff-Hoenninger
This study describes the development of near-infrared spectroscopy (NIRS) calibration to determine individual and total glucosinolates (GSLs) content of 12 new-bred open-pollinating genotypes of broccoli (Brassica oleracea convar. botrytis var. italica). Six individual GSLs were identified using high-performance-liquid chromatography (HPLC). The NIRS calibration was established based on modified partial least squares regression with reference values of HPLC. The calibration was analyzed using coefficient of determination in prediction (R(2)) and ratio of preference of determination (RPD)...
October 1, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28423681/sulforaphane-for-the-chemoprevention-of-bladder-cancer-molecular-mechanism-targeted-approach
#16
REVIEW
Andrew Leone, Gregory Diorio, Wade Sexton, Michael Schell, Mark Alexandrow, Jed W Fahey, Nagi B Kumar
The clinical course for both early and late stage Bladder Cancer (BC) continues to be characterized by significant patient burden due to numerous occurrences and recurrences requiring frequent surveillance strategies, intravesical drug therapies, and even more aggressive treatments in patients with locally advanced or metastatic disease. For these reasons, BC is also the most expensive cancer to treat. Fortunately, BC offers an excellent platform for chemoprevention interventions with potential to optimize the systemic and local exposure of promising agents to the bladder mucosa...
May 23, 2017: Oncotarget
https://www.readbyqxmd.com/read/28419960/preferentially-enhancing-anti-cancer-isothiocyanates-over-glucosinolates-in-broccoli-sprouts-how-nacl-and-salicylic-acid-affect-their-formation
#17
Azadeh Esfandiari, Ali Saei, Marian J McKenzie, Adam J Matich, Mesbah Babalar, Donald A Hunter
Broccoli (Brassica oleracea L. var. italica) sprouts contain glucosinolates (GLs) that when hydrolysed yield health promoting isothiocyanates such as sulforaphane (SF). SF content can be increased by salt (NaCl) stress, although high salt concentrations negatively impact plant growth. Salicylic acid (SA) treatments can attenuate the negative effects of salt on growth. To test whether sprout isothiocyanate content could be elevated without sprout growth being compromised, broccoli seed were germinated and grown for seven days in salt (0, 80 and 160 mM) alone and in combination with 100 μM SA...
June 2017: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/28362416/a-straightforward-method-for-glucosinolate-extraction-and-analysis-with-high-pressure-liquid-chromatography-hplc
#18
Katharina Grosser, Nicole M van Dam
Glucosinolates are a well-studied and highly diverse class of natural plant compounds. They play important roles in plant resistance, rapeseed oil quality, food flavoring, and human health. The biological activity of glucosinolates is released upon tissue damage, when they are mixed with the enzyme myrosinase. This results in the formation of pungent and toxic breakdown products, such as isothiocyanates and nitriles. Currently, more than 130 structurally different glucosinolates have been identified. The chemical structure of the glucosinolate is an important determinant of the product that is formed, which in turn determines its biological activity...
March 15, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28344636/development-of-an-efficient-glucosinolate-extraction-method
#19
T Doheny-Adams, K Redeker, V Kittipol, I Bancroft, S E Hartley
BACKGROUND: Glucosinolates, anionic sulfur rich secondary metabolites, have been extensively studied because of their occurrence in the agriculturally important brassicaceae and their impact on human and animal health. There is also increasing interest in the biofumigant properties of toxic glucosinolate hydrolysis products as a method to control agricultural pests. Evaluating biofumigation potential requires rapid and accurate quantification of glucosinolates, but current commonly used methods of extraction prior to analysis involve a number of time consuming and hazardous steps; this study aimed to develop an improved method for glucosinolate extraction...
2017: Plant Methods
https://www.readbyqxmd.com/read/28287418/dietary-broccoli-alters-rat-cecal-microbiota-to-improve-glucoraphanin-hydrolysis-to-bioactive-isothiocyanates
#20
Xiaoji Liu, Yanling Wang, Jennifer L Hoeflinger, Bárbara P Neme, Elizabeth H Jeffery, Michael J Miller
Broccoli consumption brings many health benefits, including reducing the risk of cancer and inflammatory diseases. The objectives of this study were to identify global alterations in the cecal microbiota composition using 16S rRNA sequencing analysis and glucoraphanin (GRP) hydrolysis to isothiocyanates ex vivo by the cecal microbiota, following different broccoli diets. Rats were randomized to consume AIN93G (control) or different broccoli diets; AIN93G plus cooked broccoli, a GRP-rich powder, raw broccoli, or myrosinase-treated cooked broccoli...
March 10, 2017: Nutrients
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