Keyword search (3,448 papers available)


Transcriptomic analysis suggests the inhibition of DNA damage repair in green alga Raphidocelis subcapitata exposed to roxithromycin.

Author(s): Guo J, Bai Y, Chen Z, Mo J, Li Q, Sun H, Zhang Q

Ecotoxicol Environ Saf. 2020 Jun 03;201:110737 Authors: Guo J, Bai Y, Chen Z, Mo J, Li Q, Sun H, Zhang Q

Article GUID: 32505758
Four Aromatic Intradiol Ring Cleavage Dioxygenases from Aspergillus niger.

Author(s): Semana P, Powlowski J

Ring cleavage dioxygenases catalyze the critical ring-opening step in the catabolism of aromatic compounds. The archetypal filamentous fungus Aspergillus niger previously has been reported to be able to utilize a range of monocyclic aromatic compounds as so...

Article GUID: 31540981
How Well Does the Hole-Burning Action Spectrum Represent the Site-Distribution Function of the Lowest-Energy State in Photosynthetic Pigment-Protein Complexes?

Author(s): Zazubovich V, Jankowiak R

J Phys Chem B. 2019 Jul 02;: Authors: Zazubovich V, Jankowiak R

Article GUID: 31265294
Virtual screening, docking, and dynamics of potential new inhibitors of dihydrofolate reductase from Yersinia pestis.

Author(s): Bastos Lda C, de Souza FR, Guimarães AP, Sirouspour M, Cuya Guizado TR, Forgione P, Ramalho TC, França TC

J Biomol Struct Dyn. 2016 Oct;34(10):2184-98 Authors: Bastos Lda C, de Souza FR, Guimarães AP, Sirouspour M, Cuya Guizado TR, Forgione P, Ramalho TC, França TC

Article GUID: 26494420
Docking and molecular dynamics studies of peripheral site ligand-oximes as reactivators of sarin-inhibited human acetylcholinesterase.

Author(s): de Almeida JS, Cuya Guizado TR, Guimarães AP, Ramalho TC, Gonçalves AS, de Koning MC, França TC

J Biomol Struct Dyn. 2016 Dec;34(12):2632-2642 Authors: de Almeida JS, Cuya Guizado TR, Guimarães AP, Ramalho TC, Gonçalves AS, de Koning MC, França TC

Article GUID: 26612005
O(6)-Alkylguanine DNA Alkyltransferase Repair Activity Towards Intrastrand Cross-Linked DNA is Influenced by the Internucleotide Linkage.

Author(s): O'Flaherty DK, Wilds CJ

Chem Asian J. 2016 Feb 18;11(4):576-83 Authors: O'Flaherty DK, Wilds CJ

Article GUID: 26692563
A bio-inspired synthesis of oxindoles by catalytic aerobic dual C-H functionalization of phenols.

Author(s): Huang Z, Askari MS, Esguerra KVN, Dai TY, Kwon O, Ottenwaelder X, Lumb JP

Chem Sci. 2016 Jan 01;7(1):358-369 Authors: Huang Z, Askari MS, Esguerra KVN, Dai TY, Kwon O, Ottenwaelder X, Lumb JP

Article GUID: 29861988
The Chemical Ecology of Predatory Soil Bacteria.

Author(s): Findlay BL

ACS Chem Biol. 2016 06 17;11(6):1502-10 Authors: Findlay BL

Article GUID: 27035738
Mechanistic studies of new oximes reactivators of human butyryl cholinesterase inhibited by cyclosarin and sarin.

Author(s): de Lima WE, Francisco A, da Cunha EF, Radic Z, Taylor P, França TC, Ramalho TC

J Biomol Struct Dyn. 2017 May;35(6):1272-1282 Authors: de Lima WE, Francisco A, da Cunha EF, Radic Z, Taylor P, França TC, Ramalho TC

Article GUID: 27125569
Title:Transcriptomic analysis suggests the inhibition of DNA damage repair in green alga Raphidocelis subcapitata exposed to roxithromycin.
Authors:Guo J,  Bai Y,  Chen Z,  Mo J,  Li Q,  Sun H,  Zhang Q
Link:https://www.ncbi.nlm.nih.gov/pubmed/32505758?dopt=Abstract
DOI:10.1016/j.ecoenv.2020.110737
Category:Ecotoxicol Environ Saf
PMID:32505758
Dept Affiliation: CHEMISTRY
1 Shaanxi Key Laboratory of Earth Surface System and Environmental Carrying Capacity, College of Urban and Environmental Sciences, Northwest University, Xi'an, 710127, China.
2 Department of Building, Civil and Environmental Engineering, Concordia University, Montreal, H3G 1M8, Canada.
3 Department of Chemistry, City University of Hong Kong, Kowloon, Hong Kong.
4 Shaanxi Key Laboratory of Earth Surface System and Environmental Carrying Capacity, College of Urban and Environmental Sciences, Northwest University, Xi'an, 710127, China. Electronic address: zhang-qiang@nwu.edu.cn.

Description:

Transcriptomic analysis suggests the inhibition of DNA damage repair in green alga Raphidocelis subcapitata exposed to roxithromycin.

Ecotoxicol Environ Saf. 2020 Jun 03;201:110737

Authors: Guo J, Bai Y, Chen Z, Mo J, Li Q, Sun H, Zhang Q

Abstract

Macrolide antibiotics are common contaminants in the aquatic environment. They are toxic to a wide range of primary producers, inhibiting the algal growth and further hindering the delivery of several ecosystem services. Yet the molecular mechanisms of macrolides in algae remain undetermined. The objectives of this study were therefore to: 1. evaluate whether macrolides at the environmentally relevant level inhibit the growth of algae; and 2. test the hypothesis that macrolides bind to ribosome and inhibit protein translocation in algae, as it does in bacteria. In this study, transcriptomic analysis was applied to elucidate the toxicological mechanism in a model green alga Raphidocelis subcapitata treated with 5 and 90 µg L-1 of a typical macrolide roxithromycin (ROX). While exposure to ROX at 5 µg L-1 for 7 days did not affect algal growth and the transciptome, ROX at 90 µg L-1 resulted in 45% growth inhibition and 2306 (983 up- and 1323 down-regulated) DEGs, which were primarily enriched in the metabolism of energy, lipid, vitamins, and DNA replication and repair pathways. Nevertheless, genes involved in pathways in relation to translation and protein translocation and processing were dysregulated. Surprisingly, we found that genes involved in the base excision repair process were mostly repressed, suggesting that ROX may be genotoxic and cause DNA damage in R. subcapitata. Taken together, ROX was unlikely to pose a threat to green algae in the environment and the mode of action of macrolides in bacteria may not be directly extrapolated to green algae.

PMID: 32505758 [PubMed - as supplied by publisher]