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Aldehyde dehydrogenase

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https://www.readbyqxmd.com/read/28106896/the-2016-bowman-lecture-conjunctival-curses-scarring-conjunctivitis-30-years-on
#1
J K Dart
This review is in two sections. The first section summarises 35 conditions, both common and infrequent, causing cicatrising conjunctivitis. Guidelines for making a diagnosis are given together with the use of diagnostic tests, including direct and indirect immunofluorescence, and their interpretation. The second section evaluates our knowledge of ocular mucous membrane pemphigoid, which is the commonest cause of cicatrizing conjunctivitis in most developed countries. The clinical characteristics, demographics, and clinical signs of the disease are described...
January 20, 2017: Eye
https://www.readbyqxmd.com/read/28106104/high-aldh1-expression-correlates-with-better-prognosis-in-tumorigenic-malignant-melanoma
#2
Laura A Taylor, Ronnie M Abraham, Emin Tahirovic, Patricia van Belle, Bin Li, Linfang Huang, David E Elder, Phyllis Gimotty, Xiaowei Xu
Aldehyde dehydrogenase 1 (ALDH1) has been proposed as biomarker of stem cells for certain human cancers. ALDH1 expression has been correlated with poor patient outcomes in a variety of malignancies but better patient outcomes in others, and its prognostic significance in malignant melanoma is unclear. Thus, 68 melanoma patients with comprehensive clinical and pathologic follow-up data were used to construct a tissue microarray. A modified histological score (H-score) with a maximum score of 300 was used to quantify immunohistochemical staining for ALDH1...
January 20, 2017: Modern Pathology: An Official Journal of the United States and Canadian Academy of Pathology, Inc
https://www.readbyqxmd.com/read/28105240/transforming-growth-factor-%C3%AE-1-enhances-stemness-of-head-and-neck-squamous-cell-carcinoma-cells-through-activation-of-wnt-signaling
#3
Woo-Jin Bae, Sang-Hyuk Lee, Young-Soo Rho, Bon-Seok Koo, Young-Chang Lim
Transforming growth factor β (TGFβ) ligands, including TGFβ1, are multifunctional cytokines known as key regulators of cell growth, differentiation and inflammation. Dysregulated TGFβ signaling is common in numerous solid tumors, including head and neck squamous cell carcinoma (HNSCC). Previously, TGFβ ligands were also reported to be associated with an enhancement of stemness in glioma stem-like cells. However, their role in HNSCC cancer stem cells (CSCs) has not been explored. The present study demonstrated that TGFβ1 enriches the properties of HNSCC CSCs...
December 2016: Oncology Letters
https://www.readbyqxmd.com/read/28104374/spectroscopic-characterisation-of-interaction-of-ferulic-acid-with-aldehyde-dehydrogenase-aldh
#4
Ayodele O Kolawole, Ruth J Agaba, Matthew O Oluwole
Interaction of pharmacological important phenolic, ferulic acid, with Aldehyde dehydrogenase (ALDH) at the simulative pH condition, was studied using spectroscopic approach. Ferulic acid caused a decrease in the fluorescence intensity formed from ALDH-ferulic acid complex resulting in mixed inhibition of ALDH activity (IC50=30.65μM). The intrinsic quenching was dynamic and induced altered conformation of ALDH and makes the protein less compact but might not unfold it. ALDH has two binding sites for ferulic acid at saturating concentrations having association constant of 1...
January 16, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28103884/aryl-hydrocarbon-receptor-cytochrome-p450%C3%A2-1a1-pathway-mediates-breast-cancer-stem-cells-expansion-through-pten-inhibition-and-%C3%AE-catenin-and-akt-activation
#5
Abdullah Al-Dhfyan, Ali Alhoshani, Hesham M Korashy
BACKGROUND: Breast cancer stem cells (CSCs) are small sub-type of the whole cancer cells that drive tumor initiation, progression and metastasis. Recent studies have demonstrated a role for the aryl hydrocarbon receptor (AhR)/cytochrome P4501A1 pathway in CSCs expansion. However, the exact molecular mechanisms remain unclear. METHODS: The current study was designed to a) determine the effect of AhR activation and inhibition on breast CSCs development, maintenance, self-renewal, and chemoresistance at the in vitro and in vivo levels and b) explore the role of β-Catenin, PI3K/Akt, and PTEN signaling pathways...
January 19, 2017: Molecular Cancer
https://www.readbyqxmd.com/read/28101462/identification-and-molecular-characterization-of-genes-coding-pharmaceutically-important-enzymes-from-halo-thermo-tolerant-bacillus
#6
Azam Safary, Rezvan Moniri, Maryam Hamzeh-Mivehroud, Siavoush Dastmalchi
Purpose: Robust pharmaceutical and industrial enzymes from extremophile microorganisms are main source of enzymes with tremendous stability under harsh conditions which make them potential tools for commercial and biotechnological applications. Methods: The genome of a Gram-positive halo-thermotolerant Bacillus sp. SL1, new isolate from Saline Lake, was investigated for the presence of genes coding for potentially pharmaceutical enzymes. We determined gene sequences for the enzymes laccase (CotA), l-asparaginase (ansA3, ansA1), glutamate-specific endopeptidase (blaSE), l-arabinose isomerase (araA2), endo-1,4-β mannosidase (gmuG), glutaminase (glsA), pectate lyase (pelA), cellulase (bglC1), aldehyde dehydrogenase (ycbD) and allantoinases (pucH) in the genome of Bacillus sp...
December 2016: Advanced Pharmaceutical Bulletin
https://www.readbyqxmd.com/read/28101461/acute-and-subchronic-toxicity-study-of-the-median-septum-of-juglans-regia-in-wistar-rats
#7
Asma Ravanbakhsh, Majid Mahdavi, Ghader Jalilzade-Amin, Shahram Javadi, Masoud Maham, Daryosh Mohammadnejad, Mohammad Reza Rashidi
Purpose: Median septum of Juglans regia L. (Juglandaceae) with anti-diabetic effects has been used in Iranian traditional medicine. The present study estimates both oral acute and subchronic toxicities. Methods: In the oral acute toxicity study, female Wistar rats were treated with doses of 10, 100, 1000, 1600, 2900 and 5000 mg/ kg of the Juglans regia septum of methanol extract (JRSME), and were monitored for 14 days. In subchronic study, JRSME was administered by gavage at dose of 1000 mg/kg daily in Wistar rats for 28 days...
December 2016: Advanced Pharmaceutical Bulletin
https://www.readbyqxmd.com/read/28099503/3d-functional-corneal-stromal-tissue-equivalent-based-on-corneal-stromal-stem-cells-and-multi-layered-silk-film-architecture
#8
Chiara E Ghezzi, Benedetto Marelli, Fiorenzo G Omenetto, James L Funderburgh, David L Kaplan
The worldwide need for human cornea equivalents continues to grow. Few clinical options are limited to allogenic and synthetic material replacements. We hypothesized that tissue engineered human cornea systems based on mechanically robust, patterned, porous, thin, optically clear silk protein films, in combination with human corneal stromal stem cells (hCSSCs), would generate 3D functional corneal stroma tissue equivalents, in comparison to previously developed 2D approaches. Silk film contact guidance was used to control the alignment and distribution of hCSSCs on RGD-treated single porous silk films, which were then stacked in an orthogonally, multi-layered architecture and cultured for 9 weeks...
2017: PloS One
https://www.readbyqxmd.com/read/28098394/use-of-asian-samples-in-genetic-research-of-alcohol-use-disorders-genetic-variation-of-alcohol-metabolizing-enzymes-and-the-effects-of-acetaldehyde
#9
Sachio Matsushita, Susumu Higuchi
BACKGROUND AND OBJECTIVES: Epidemiological studies consistently find that Asian populations report lower rates of alcohol use disorders (AUD) compared with other racial groups. These differences result from a variety of biological, genetic, and environmental influences, some of which are related to the metabolism of alcohol. We will review several studies of these metabolic factors, including several alcohol clamping studies conducted in our laboratory, that provide further insight into the role of the alcohol metabolizing genes and drinking behavior among Japanese drinkers...
January 18, 2017: American Journal on Addictions
https://www.readbyqxmd.com/read/28093656/measurement-of-crude-cell-extract-glycerol-dehydratase-activity-in-recombinant-escherichia-coli-using-coupled-enzyme-reactions
#10
Mugesh Sankaranarayanan, Eunhee Seol, Yeonhee Kim, Ashish Singh Chauhan, Sunghoon Park
Glycerol dehydratase (GDHt), which converts glycerol to 3-hydroxypropionaldehyde, is essential to the production of 1,3-propanediol (1,3-PDO) or 3-hydroxypropionic acid (3-HP). A reliable GDHt activity assay in crude-cell extract was developed. In the assay, GDHt converted 1,2-propanediol (1,2-PDO) to propionaldehyde, which was further converted to 1-propionic acid by aldehyde dehydrogenase (KGSADH) or to 1-propanol by yeast-alcohol dehydrogenase (yADH), while the NADH concentration change was monitored spectrophotometrically...
January 16, 2017: Journal of Industrial Microbiology & Biotechnology
https://www.readbyqxmd.com/read/28087462/impact-of-disease-linked-mutations-targeting-the-oligomerization-interfaces-of-aldehyde-dehydrogenase-7a1
#11
David A Korasick, John J Tanner, Michael T Henzl
Aldehyde dehydrogenase 7A1 (ALDH7A1) is involved in lysine catabolism, catalyzing the oxidation of α-aminoadipate semialdehyde to α-aminoadipate. Certain mutations in the ALDH7A1 gene, which are presumed to reduce catalytic activity, cause an autosomal recessive seizure disorder known as pyridoxine-dependent epilepsy (PDE). Although the genetic association between ALDH7A1 and PDE is well established, little is known about the impact of PDE-mutations on the structure and catalytic function of the enzyme. Herein we report the first study of the molecular consequences of PDE mutations using purified ALDH7A1 variants...
January 10, 2017: Chemico-biological Interactions
https://www.readbyqxmd.com/read/28074225/recent-advances-in-biotechnological-applications-of-alcohol-dehydrogenases
#12
REVIEW
Yu-Guo Zheng, Huan-Huan Yin, Dao-Fu Yu, Xiang Chen, Xiao-Ling Tang, Xiao-Jian Zhang, Ya-Ping Xue, Ya-Jun Wang, Zhi-Qiang Liu
Alcohol dehydrogenases (ADHs), which belong to the oxidoreductase superfamily, catalyze the interconversion between alcohols and aldehydes or ketones with high stereoselectivity under mild conditions. ADHs are widely employed as biocatalysts for the dynamic kinetic resolution of racemic substrates and for the preparation of enantiomerically pure chemicals. This review provides an overview of biotechnological applications for ADHs in the production of chiral pharmaceuticals and fine chemicals.
February 2017: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28073535/new-oxylipins-produced-at-the-end-of-a-diatom-bloom-and-their-effects-on-copepod-reproductive-success-and-gene-expression-levels
#13
Chiara Lauritano, Giovanna Romano, Vittoria Roncalli, Angela Amoresano, Carolina Fontanarosa, Mauro Bastianini, Federica Braga, Ylenia Carotenuto, Adrianna Ianora
Diatoms are dominant photosynthetic organisms in the world's oceans and are considered essential in the transfer of energy to higher trophic levels. However, these unicellular organisms produce secondary metabolites deriving from the oxidation of fatty acids, collectively termed oxylipins, with negative effects on predators, such as copepods, that feed on them (e.g. reduction in survival, egg production and hatching success) and, indirectly, on higher trophic levels. Here, a multidisciplinary study (oxylipin measurements, copepod fitness, gene expression analyses, chlorophyll distribution, phytoplankton composition, physico-chemical characteristics) was carried out at the end of the spring diatom bloom in April 2011 in the Northern Adriatic Sea (Mediterranean Sea) in order to deeply investigate copepod-diatom interactions, chemical communication and response pathways...
May 2016: Harmful Algae
https://www.readbyqxmd.com/read/28064365/characterization-of-membrane-bound-dehydrogenases-of-gluconobacter-oxydans-621h-using-a-new-system-for-their-functional-expression
#14
Markus Mientus, David Kostner, Björn Peters, Wolfgang Liebl, Armin Ehrenreich
Acetic acid bacteria are used in biotechnology due to their ability to incompletely oxidize a great variety of carbohydrates, alcohols, and related compounds in a regio- and stereo-selective manner. These reactions are catalyzed by membrane-bound dehydrogenases (mDHs), often with a broad substrate spectrum. In this study, the promoters of six mDHs of Gluconobacter oxydans 621H were characterized. The constitutive promoter of the alcohol dehydrogenase and the glucose-repressed promoter of the inositol dehydrogenase were used to construct a shuttle vector system for the fully functional expression of mDHs in the multi-deletion strain G...
January 7, 2017: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28062952/characterization-of-aldehyde-dehydrogenases-applying-an-enzyme-assay-with-in-situ-formation-of-phenylacetaldehydes
#15
Juliane Zimmerling, Dirk Tischler, Carolin Großmann, Michael Schlömann, Michel Oelschlägel
Herein, different dehydrogenases (DH) were characterized by applying a novel two-step enzyme assay. We focused on the NAD(P)(+)-dependent phenylacetaldehyde dehydrogenases because they produce industrially relevant phenylacetic acids, but they are not well studied due to limited substrate availability. The first assay step comprises a styrene oxide isomerase (440 U mg(-1)protein) which allows the production of pure phenylacetaldehydes (>70 mmol L(-1)) from commercially available styrene oxides. Thereafter, a DH of interest can be added to convert phenylacetaldehydes in a broad concentration range (0...
January 6, 2017: Applied Biochemistry and Biotechnology
https://www.readbyqxmd.com/read/28060874/salmon-dna-accelerates-bone-regeneration-by-inducing-osteoblast-migration
#16
Ayako Sato, Hiroshi Kajiya, Nana Mori, Hironobu Sato, Tadao Fukushima, Hirofumi Kido, Jun Ohno
The initial step of bone regeneration requires the migration of osteogenic cells to defective sites. Our previous studies suggest that a salmon DNA-based scaffold can promote the bone regeneration of calvarial defects in rats. We speculate that the salmon DNA may possess osteoinductive properties, including the homing of migrating osteogenic cells. In the present study, we investigated the influence of the salmon DNA on osteoblastic differentiation and induction of osteoblast migration using MG63 cells (human preosteoblasts) in vitro...
2017: PloS One
https://www.readbyqxmd.com/read/28058634/alkane-biosynthesis-by-aspergillus-carbonarius-item-5010-through-heterologous-expression-of-synechococcus-elongatus-acyl-acp-coa-reductase-and-aldehyde-deformylating-oxygenase-genes
#17
Malavika Sinha, István Weyda, Annette Sørensen, Kenneth S Bruno, Birgitte K Ahring
In this study we describe the heterologous expression of the recently identified cyanobacterial pathway for long chain alkane biosynthesis, involving the reduction of fatty acyl-ACP to fatty aldehyde and the subsequent conversion of this into alkanes, in the filamentous fungus Aspergillus carbonarius ITEM 5010. Genes originating from Synechococcus elongatus strain PCC7942, encoding acyl-ACP/CoA reductase and aldehyde deformylating oxygenase enzymes, were successfully expressed in A. carbonarius, which lead to the production of pentadecane and heptadecane, alkanes that have not been previously produced by this fungus...
December 2017: AMB Express
https://www.readbyqxmd.com/read/28057570/in-vitro-activity-and-stability-of-pure-human-salivary-aldehyde-dehydrogenase
#18
Amaj Ahmed Laskar, Md Fazle Alam, Hina Younus
Human salivary aldehyde dehydrogenase (HsALDH) appears to be the first line of defence against toxic aldehydes contained in exogenous sources and is important for maintaining healthy oral cavity and protection from oral cancer. Here, the activity and stability of purified hsALDH has been determined under different conditions such as temperature, in presence of denaturants [Urea and guanidine hydrochloride (GnHCl)] and in the presence of salt (NaCl). The pure enzyme exhibited low stability when stored at room temperature (25°C) as well as at low temperature (4°C)...
January 3, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28057548/the-protection-effects-of-1e-6e-1-7-diphenylhepta-1-6-diene-3-5-dione-a-curcumin-analogue-against-operative-liver-injury-in-rats
#19
Xiaowei Chi, Dan Yu, Peijing Li, Qianfeng Lu, Wenjiao Jiang, Kun Hao
The relationship between the chemistry characteristic and the hepatoprotective effects of (1E,6E)-1,7-diphenylhepta-1,6-diene-3,5-dione (DDD), a curcumin analogue, in operative liver injury rats was investigated to reveal the mechanism of hepatic protection effects of DDD. DDD (1.2-4.8mmol/kg) was administrated 10min before reperfusion phase in hepatic ischemia-reperfusion injury (IRI) rats. DDD (4.8mmol/kg) administrated 10min before ischemia and N-acetylcysteine (NAC) (4.8mmol/kg) administrated 10min before reperfusion were included for comparative studies...
January 2, 2017: European Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28056995/aldehyde-dehydrogenase-2-activation-and-coevolution-of-its-%C3%AE%C2%B5pkc-mediated-phosphorylation-sites
#20
Aishwarya Nene, Che-Hong Chen, Marie-Hélène Disatnik, Leslie Cruz, Daria Mochly-Rosen
BACKGROUND: Mitochondrial aldehyde dehydrogenase 2 (ALDH2) is a key enzyme for the metabolism of many toxic aldehydes such as acetaldehyde, derived from alcohol drinking, and 4HNE, an oxidative stress-derived lipid peroxidation aldehyde. Post-translational enhancement of ALDH2 activity can be achieved by serine/threonine phosphorylation by epsilon protein kinase C (εPKC). Elevated ALDH2 is beneficial in reducing injury following myocardial infarction, stroke and other oxidative stress and aldehyde toxicity-related diseases...
January 5, 2017: Journal of Biomedical Science
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