1. Distribution of aldehyde dehydrogenase activity in rat liver was studied by measuring the rate of disappearance of acetaldehyde in the presence of each of the subcellular fractions. These were obtained by rough separation of particulate fractions from the soluble portion of the cell, by differential centrifugation, and by isopycnic gradient centrifugation. 2. The maximal rate of acetaldehyde oxidation was 3.7 mumol/min per g, with an apparent K(m) value below 10(-5)m. The highest rate of activity was observed in phosphate buffers of high P(i) concentration (above 60mm). 3. The activity measured was completely dependent on NAD(+). 4. The microsomal fraction and the nuclei were inactive in the assay. Of the total activity 80% was found in the mitochondrial fraction and the remaining 20% in the cytoplasm. 5. The distribution pattern is important from the point of view of acetaldehyde oxidation during ethanol metabolism. The apparent discrepancy of the results obtained by different workers and the localization of acetaldehyde oxidation in vivo is discussed.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1178760 | PMC |
| http://dx.doi.org/10.1042/bj1270633 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Alcohol Consumption and Breast and Ovarian Cancer Development: Molecular Pathways and Mechanisms.
Curr Issues Mol Biol
December 2024
Institute of Biochemistry and Cell Biology (IBBC-CNR), Department of Sensory Organs, Sapienza University of Rome, 00161 Rome, Italy.
Alcohol consumption has been consistently linked to an increased risk of several cancers, including breast and ovarian cancer. Despite substantial evidence supporting this association, the precise mechanisms underlying alcohol's contribution to cancer pathogenesis remain incompletely understood. This narrative review focuses on the key current literature on the biological pathways through which alcohol may influence the development of breast and ovarian cancer.
View Article and Find Full Text PDFALDH Enzymes and Hematological Diseases: A Scoping Review of Literature.
Discov Med
December 2024
Department of Biological Hematology, Tours University Hospital, 37000 Tours, France.
Aldehyde dehydrogenases (ALDHs) constitute a group of enzymes that catalyze the oxidation of aldehydes to carboxylic acids. The human ALDH superfamily, including 19 different isoenzymes (ALDH1A1, ALDH1A2, ALDH1A3, AHDH1B1, ALDH1L1, ALDH1L2, ALDH2, ALDH3A1, ALDH3A2, ALDH3B1, ALDH3B2, ALDH4A1, ALDH5A1, ALDH6A1, ALDH7A1, ALDH8A1, ALDH9A1, ALDHA16A1, ALDH18A1), displays different key physiological and toxicological functions, with specific tissue expression and substrate specificity. Several studies have established that ALDH are interesting markers for the identification and quantification of human hematopoietic stem cells and cancer stem cells, notably leukemic stem cells.
View Article and Find Full Text PDFKinetics and Oligomer Products of the Multiphase Reactions of Hydroxyacetone with Atmospheric Amines, Ammonium Sulfate, and Cloud Processing.
ACS Earth Space Chem
December 2024
Université Paris-Est Créteil and Université Paris Cité, CNRS, LISA, Créteil F-94010, France.
Hydroxyacetone (HA) is an atmospheric oxidation product of isoprene and other organic precursors that can form brown carbon (BrC). Measured bulk aqueous-phase reaction rates of HA with ammonium sulfate, methylamine, and glycine suggest that these reactions cannot compete with aqueous-phase hydroxyl radical oxidation. In cloud chamber photooxidation experiments with either gaseous or particulate HA in the presence of the same N-containing species, BrC formation was minor, with similar mass absorption coefficients at 365 nm (<0.
View Article and Find Full Text PDFPt-Decorated ZnO Nanorods for Light-Assisted Ethanol Sensing and Analysis of the Sensing Mechanism under Light Irradiation.
ACS Appl Mater Interfaces
December 2024
Faculty of Advanced Science and Technology, Kumamoto University, Kumamoto 860-8555, Japan.
ZnO nanorods have attracted much attention owing to their outstanding properties for chemical gas sensors. Although they show greater sensing properties than conventional nanoparticulate ZnO, high operation temperature (>250-350 °C) is required for them to work even if precious metals are deposited on them to sensitize their sensing properties. Light irradiation is one solution for overcoming the high operation temperature and the gas selectivity because it assists the oxidation activity on the surface that affects the sensor response.
View Article and Find Full Text PDFUnraveling the Strength and Nature of Se∙∙∙O Chalcogen Bonds: A Comparative Study of SeF and SeF Interactions with Oxygen-Bearing Lewis Bases.
Molecules
December 2024
School of Basic Medical Sciences/School of Biology and Engineering, Guizhou Medical University, Guiyang 550025, China.
Chalcogen bonds (ChBs) involving selenium have attracted substantial scholarly interest in past years owing to their fundamental roles in various chemical and biological fields. However, the effect of the valency state of the electron-deficient selenium atom on the characteristics of such ChBs remains unexplored. Herein, we comparatively studied the σ-hole-type Se∙∙∙O ChBs between SeF/SeF and a series of oxygen-bearing Lewis bases, including water, methanol, dimethyl ether, ethylene oxide, formaldehyde, acetaldehyde, acetone, and formic acid, using ab initio computations.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!