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https://www.readbyqxmd.com/read/28737395/kinetic-study-of-the-aroxyl-radical-scavenging-activity-of-five-fatty-acid-esters-and-six-carotenoids-in-toluene-solution-structure-activity-relationship-for-the-hydrogen-abstraction-reaction
#1
Kazuo Mukai, Maya Yoshimoto, Masaharu Ishikura, Shin-Ichi Nagaoka
A kinetic study of the reaction between aroxyl (ArO•) radical and fatty acid esters (LHs 1 - 5, ethyl stearate 1, ethyl oleate 2, ethyl linoleate 3, ethyl linolenate 4, and ethyl arachidonate 5) has been undertaken. The second-order rate constants (ks) for the reaction of ArO• radical with LHs 1 - 5 in toluene at 25.0oC have been determined spectrophotometrically. The ks values obtained increased in the order of LH 1<2<3<4<5, that is, with increasing the number of double bonds included in LHs 1 - 5...
July 24, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28732066/inhibition-of-pulmonary-%C3%AE-carotene-15-15-oxygenase-expression-by-glucocorticoid-involves-ppar%C3%AE
#2
Xiaoming Gong, Raju Marisiddaiah, Lewis P Rubin
β-carotene 15,15'-oxygenase (BCO1) catalyzes the first step in the conversion of dietary provitamin A carotenoids to vitamin A. This enzyme is expressed in a variety of developing and adult tissues, suggesting that its activity may regulate local retinoid synthesis. Vitamin A and related compounds (retinoids) are critical regulators of lung epithelial development, integrity, and injury repair. A balance between the actions of retinoids and glucocorticoids (GCs) promotes normal lung development and, in particular, alveolarization...
2017: PloS One
https://www.readbyqxmd.com/read/28731798/most-colorful-example-of-genetic-assimilation-exploring-the-evolutionary-destiny-of-recurrent-phenotypic-accommodation
#3
Alexander V Badyaev, Ahva L Potticary, Erin S Morrison
Evolution of adaptation requires both generation of novel phenotypic variation and retention of a locally beneficial subset of this variation. Such retention can be facilitated by genetic assimilation, the accumulation of genetic and molecular mechanisms that stabilize induced phenotypes and assume progressively greater control over their reliable production. A particularly strong inference into genetic assimilation as an evolutionary process requires a system where it is possible to directly evaluate the extent to which an induced phenotype is progressively incorporated into preexisting developmental pathways...
August 2017: American Naturalist
https://www.readbyqxmd.com/read/28729273/draft-genome-sequence-of-microbacterium-sp-strain-lemmj01-isolated-from-antarctic-ornithogenic-soil
#4
Júnia Schultz, Yuri Alves Pinheiro de Souza, Maria Cristina Pinheiro Pereira Reis Mansur, Alane Beatriz Vermelho, Fábio Faria da Mota, Alexandre Soares Rosado
We report here the 3,637,012-bp draft genome sequence of Microbacterium sp. strain LEMMJ01, isolated from ornithogenic soil from King George Island, Antarctica. The total number of genes presented in the draft genome sequence was 3,553, and the total number of coding sequences was 3,497. In addition, genes related to the production of terpene and carotenoids were revealed.
July 20, 2017: Genome Announcements
https://www.readbyqxmd.com/read/28728169/correlations-between-macular-skin-and-serum-carotenoids
#5
Christopher D Conrady, James P Bell, Brian M Besch, Aruna Gorusupudi, Kelliann Farnsworth, Igor Ermakov, Mohsen Sharifzadeh, Maia Ermakova, Werner Gellermann, Paul S Bernstein
Purpose: Ocular and systemic measurement and imaging of the macular carotenoids lutein and zeaxanthin have been employed extensively as potential biomarkers of AMD risk. In this study, we systematically compare dual wavelength retinal autofluorescence imaging (AFI) of macular pigment with skin resonance Raman spectroscopy (RRS) and serum carotenoid levels in a clinic-based population. Methods: Eighty-eight patients were recruited from retina and general ophthalmology practices from a tertiary referral center and excluded only if they did not have all three modalities tested, had a diagnosis of macular telangiectasia (MacTel) or Stargardt disease, or had poor AFI image quality...
July 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28727051/carotenoid-intake-and-scd-genotype-exert-complementary-effects-over-fat-content-and-fatty-acid-composition-in-duroc-pigs
#6
E Henriquez-Rodriguez, R N Pena, A R Seradj, L Fraile, P Christou, M Tor, J Estany
Nutritional and genetic strategies are needed to enhance intramuscular fat (IMF) and MUFA content without altering carcass leanness. Dietary vitamin A restriction has been suggested to specifically promote IMF, whereas a polymorphism of the () gene has shown to specifically increase MUFA. The purpose of this study was to investigate the combined effects of provitamin A (PVA) carotenoid intake and genotype (>) on hepatic retinoid content and on the liver, muscle (LM and gluteus medius [GM]), and subcutaneous fat (SF) content and fatty acid composition...
June 2017: Journal of Animal Science
https://www.readbyqxmd.com/read/28726228/microwave-irradiation-and-citric-acid-assisted-seed-germination-and-phytoextraction-of-nickel-ni-by-brassica-napus-l-morpho-physiological-and-biochemical-alterations-under-ni-stress
#7
Mujahid Farid, Shafaqat Ali, Muhammad Rizwan, Rashid Saeed, Hafiz Muhammad Tauqeer, Rasham Sallah-Ud-Din, Ahmed Azam, Nighat Raza
The complex bio-geochemistry of soil allows pollutant to persist for a longer period of time which further decreased the fertility and natural composition of land. Nickel, an inorganic pollutant, coming from a wide range of industrial and manufacturing units possesses serious threat to soil degradation and crop productivity around the world. The present study was carried to evaluate the combined role of microwave irradiation (MR) and citric acid (CA) on the phytoextraction potential of Brassica napus L. under Ni stress...
July 20, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28724949/overexpression-of-slpre2-an-atypical-bhlh-transcription-factor-affects-plant-morphology-and-fruit-pigment-accumulation-in-tomato
#8
Zhiguo Zhu, Guoping Chen, Xuhu Guo, Wencheng Yin, Xiaohui Yu, Jingtao Hu, Zongli Hu
The basic helix-loop-helix (bHLH) proteins are a large family of transcription factors that control various developmental processes in eukaryotes, but the biological roles of most bHLH proteins are not very clear, especially in tomato. In this study, a PRE-like atypical bHLH gene was isolated and designated as SlPRE2 in tomato. SlPRE2 was highly expressed in immature-green fruits, moderately in young leaves, flowers, and mature-green fruits. To further research the function of SlPRE2, a 35 S:PRE2 binary vector was constructed and transformed into wild type tomato...
July 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28724407/characterization-of-the-cytochrome-p450-monooxygenase-genes-p450ome-from-the-carotenogenic-yeast-xanthophyllomyces-dendrorhous
#9
Pamela Córdova, Ana-María Gonzalez, David R Nelson, María-Soledad Gutiérrez, Marcelo Baeza, Víctor Cifuentes, Jennifer Alcaíno
BACKGROUND: The cytochromes P450 (P450s) are a large superfamily of heme-containing monooxygenases involved in the oxidative metabolism of an enormous diversity of substrates. These enzymes require electrons for their activity, and the electrons are supplied by NAD(P)H through a P450 electron donor system, which is generally a cytochrome P450 reductase (CPR). The yeast Xanthophyllomyces dendrorhous has evolved an exclusive P450-CPR system that specializes in the synthesis of astaxanthin, a carotenoid with commercial potential...
July 19, 2017: BMC Genomics
https://www.readbyqxmd.com/read/28721756/lycopene-ameliorates-experimental-colitis-in-rats-via-reducing-apoptosis-and-oxidative-stress
#10
Burcu Gul Baykalir, Dilek Aksit, Mustafa Selim Dogru, Arzu Hanım Yay, Hasan Aksit, Kamil Seyrek, Ahmet Attesahin
Inflammatory bowel disease (IBD) is an inflammatory disorder involving colitis. Lycopene is a naturally occurring carotenoid that has attracted considerable attention as a potential chemopreventive agent. The impact of lycopene on colitis is currently unknown. The aim of this study was to investigate the protective effects of lycopene in a rat model of colitis induced by acetic acid. The animals were randomly divided into the following five groups: the control group, colitis group, colitis + sulfasalazine group as a positive control group, colitis + lycopene and lycopene groups...
July 19, 2017: International Journal for Vitamin and Nutrition Research. Journal International de Vitaminologie et de Nutrition
https://www.readbyqxmd.com/read/28720940/recovery-of-protein-hydrolysate-and-chitosan-from-black-tiger-shrimp-penaeus-monodon-heads-approaching-a-zero-waste-process
#11
Pham Thi Dan Phuong, Nguyen Cong Minh, Hoang Ngoc Cuong, Nguyen Van Minh, Nguyen The Han, Nguyen Van Hoa, Ha Thi Hai Yen, Trang Si Trung
Shrimp heads are considered as a potential source for the recovery of many valuable components such as chitin, protein and carotenoids. In the present study, both protein hydrolysate and chitin/chitosan were recovered using combination of physical, biological and chemical treatments. Shrimp heads were separated from liquid phase by a facile and efficient physical pretreatment. The liquid fraction was then hydrolyzed using formic acid and vacuum concentrated to obtain an astaxanthin-rich protein hydrolysate...
June 2017: Journal of Food Science and Technology
https://www.readbyqxmd.com/read/28719215/origin-of-the-s-excited-state-feature-of-carotenoids-in-light-harvesting-complex-1-from-purple-photosynthetic-bacteria
#12
Dariusz M Niedzwiedzki, David Swainsbury, Elizabeth C Martin, Christopher Neil Hunter, Robert E Blankenship
This spectroscopic study investigates the origin of the transient feature of the S* excited-state of carotenoids bound in LH1 complexes from purple bacteria. The studies were performed on two RC-LH1 complexes from Rba. sphaeroides strains that bound carotenoids with different carbon-carbon double bond conjugation N, neurosporene (N = 9) and spirilloxanthin (N = 13). The S* transient spectral feature, originally associated with an elusive and optically silent excited state of spirilloxanthin in the LH1 complex may be successfully explained and mimicked without involving any unknown electronic state...
July 18, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28717804/relationship-between-total-fruit-and-vegetable-intake-and-self-reported-knee-pain-in-older-adults
#13
H S Han, C B Chang, D-C Lee, J-Y Lee
OBJECTIVES: Knee pain is one of the most common symptoms of knee osteoarthritis (OA) that affects the quality of life in the older adults, and identifying the contributing factors of knee pain is important. We hypothesized that higher fruit and vegetable consumption might be associated with the severity of knee pain lower prevalence of severe knee pain by affecting pain perception in the knee joint. Therefore, we investigated the relationship between self-reported knee pain and the consumption of fruits vegetables, carotenoids and vitamin C and self-reported knee pain...
2017: Journal of Nutrition, Health & Aging
https://www.readbyqxmd.com/read/28717173/liquid-phase-sequence-capture-and-targeted-re-sequencing-revealed-novel-polymorphisms-in-tomato-genes-belonging-to-the-mep-carotenoid-pathway
#14
Irma Terracciano, Concita Cantarella, Carlo Fasano, Teodoro Cardi, Giuseppe Mennella, Nunzio D'Agostino
Tomato (Solanum lycopersicum L.) plants are characterized by having a variety of fruit colours that reflect the composition and accumulation of diverse carotenoids in the berries. Carotenoids are extensively studied for their health-promoting effects and this explains the great attention these pigments received by breeders and researchers worldwide. In this work we applied Agilent's SureSelect liquid-phase sequence capture and Illumina targeted re-sequencing of 34 tomato genes belonging to the methylerythritol phosphate (MEP) carotenoid pathway on a panel of 48 genotypes which differ for carotenoid content calculated as the sum of β-carotene, cis- and trans-lycopene...
July 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28717021/genetic-and-metabolic-engineering-in-diatoms
#15
REVIEW
Weichao Huang, Fayza Daboussi
Diatoms have attracted considerable attention due to their success in diverse environmental conditions, which probably is a consequence of their complex origins. Studies of their metabolism will provide insight into their adaptation capacity and are a prerequisite for metabolic engineering. Several years of investigation have led to the development of the genome engineering tools required for such studies, and a profusion of appropriate tools is now available for exploring and exploiting the metabolism of these organisms...
September 5, 2017: Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
https://www.readbyqxmd.com/read/28716419/a-%C3%AE-carotene-desaturase-gene-ibzds-increases-%C3%AE-carotene-and-lutein-contents-and-enhances-salt-tolerance-in-transgenic-sweetpotato
#16
Ruijie Li, Chen Kang, Xuejin Song, Ling Yu, Degao Liu, Shaozhen He, Hong Zhai, Qingchang Liu
ζ-Carotene desaturase (ZDS) is one of the key enzymes in carotenoid biosynthesis pathway. However, the ZDS gene has not been applied to carotenoid improvement of plants. Its roles in tolerance to abiotic stresses have not been reported. In this study, the IbZDS gene was isolated from storage roots of sweetpotato (Ipomoea batatas (L.) Lam.) cv. Nongdafu 14. Its overexpression significantly increased β-carotene and lutein contents and enhanced salt tolerance in transgenic sweetpotato (cv. Kokei No. 14) plants...
September 2017: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/28716091/suppression-of-the-phytoene-synthase-gene-egcrtb-alters-carotenoid-content-and-intracellular-structure-of-euglena-gracilis
#17
Shota Kato, Mika Soshino, Shinichi Takaichi, Takahiro Ishikawa, Noriko Nagata, Masashi Asahina, Tomoko Shinomura
BACKGROUND: Photosynthetic organisms utilize carotenoids for photoprotection as well as light harvesting. Our previous study revealed that high-intensity light increases the expression of the gene for phytoene synthase (EgcrtB) in Euglena gracilis (a unicellular phytoflagellate), the encoded enzyme catalyzes the first committed step of the carotenoid biosynthesis pathway. To examine carotenoid synthesis of E. gracilis in response to light stress, we analyzed carotenoid species and content in cells grown under various light intensities...
July 17, 2017: BMC Plant Biology
https://www.readbyqxmd.com/read/28710950/citric-acid-assisted-phytoextraction-of-chromium-by-sunflower-morpho-physiological-and-biochemical-alterations-in-plants
#18
Mujahid Farid, Shafaqat Ali, Muhammad Rizwan, Qasim Ali, Farhat Abbas, Syed Asad Hussain Bukhari, Rashid Saeed, Longhua Wu
Soil and water contamination from heavy metals and metalloids is one of the most discussed and burning global issues due to its potential to cause the scarcity of healthy food and safe water. The scientific community is proposing a range of lab and field based physical, chemical and biological solutions to remedy metals and metalloids contaminated soils and water. The present study finds out a possibility of Chromium (Cr) extraction by sunflower from spiked soil under chelating role of citric acid (CA). The sunflower plants were grown under different concentrations of Cr (0, 5, 10 & 20mgkg(-1)) and CA (0, 2...
July 12, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28704611/grasslands-a-source-of-secondary-metabolites-for-livestock-health
#19
Anne Poutaraud, Alice Michelot-Antalik, Sylvain Plantureux
Grassland constitutes a huge reservoir of secondary metabolites (e.g., phenolic compounds, alkaloids, saponins, terpenoids, carotenoids, and quinones). This phytococktail may positively and/or negatively affect livestock health and production, depending on numerous factors such as animal species and intake. This resource can be considered a low-cost, environmentally friendly way to contribute to the improvement of livestock health. Better knowledge and management of these animal health resources as well as understanding of their mode of action constitute a new multidisciplinary research field...
July 13, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28704593/cover-image-volume-118-number-9-september-2017
#20
R Priya, P Sneha, Renata Rivera Madrid, C George Priya Doss, Pooja Singh, Ramamoorthy Siva
Cover: The cover image, by R. Priya et al., is based on the Article Molecular Modeling and Dynamic Simulation of Arabidopsis Thaliana Carotenoid Cleavage Dioxygenase Gene: A Comparison with Bixa orellana and Crocus Sativus, DOI: 10.1002/jcb.25919.
September 2017: Journal of Cellular Biochemistry
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