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Carlina acaulis Exhibits Antioxidant Activity and Counteracts Aβ Toxicity in Caenorhabditis elegans
Carlina acaulis is a medicinal plant that has shown antioxidant activity in in vitro studies, but to date no corresponding in vivo data is available. Therefore, in the present study the antioxidant activity and its impact in counteracting Aβ toxicity were studied in the Caenorhabditis elegans model....
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2016
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6273941/ https://www.ncbi.nlm.nih.gov/pubmed/27384550 http://dx.doi.org/10.3390/molecules21070871 |
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author | Link, Pille Roth, Kevin Sporer, Frank Wink, Michael |
author_facet | Link, Pille Roth, Kevin Sporer, Frank Wink, Michael |
author_sort | Link, Pille |
collection | PubMed |
description | Carlina acaulis is a medicinal plant that has shown antioxidant activity in in vitro studies, but to date no corresponding in vivo data is available. Therefore, in the present study the antioxidant activity and its impact in counteracting Aβ toxicity were studied in the Caenorhabditis elegans model. A dichloromethane extract of the roots of C. acaulis was prepared and characterised via gas-liquid-chromatography/mass-spectrometry (GLC-MS). The in vitro antioxidant activity was confirmed via 2,2-diphenyl-1-picrylhydracyl assay. The extract was further separated by thin layer chromatography into two fractions, one of which was a fraction of the dichloromethane extract of C. acaulis containing mostly Carlina oxide (CarOx). Different strains of C. elegans were employed to study the expression of hsp-16.2p::GFP as a marker for oxidative stress, delocalisation of the transcription factor DAF-16 as a possible mechanism of antioxidant activity, the effect of the drug under lethal oxidative stress, and the effect against beta-amyloid (Aβ) toxicity in a paralysis assay. The C. acaulis extract and CarOx showed high antioxidant activity (stress reduction by 47% and 64%, respectively) in C. elegans and could activate the transcription factor DAF-16 which directs the expression of anti-stress genes. In paralysis assay, only the total extract was significantly active, delaying paralysis by 1.6 h. In conclusion, in vivo antioxidant activity was shown for C. acaulis for the first time in the C. elegans model. The active antioxidant compound is Carlina oxide. This activity, however, is not sufficient to counteract Aβ toxicity. Other mechanisms and possibly other active compounds are involved in this effect. |
format | Online Article Text |
id | pubmed-6273941 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2016 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-62739412018-12-28 Carlina acaulis Exhibits Antioxidant Activity and Counteracts Aβ Toxicity in Caenorhabditis elegans Link, Pille Roth, Kevin Sporer, Frank Wink, Michael Molecules Article Carlina acaulis is a medicinal plant that has shown antioxidant activity in in vitro studies, but to date no corresponding in vivo data is available. Therefore, in the present study the antioxidant activity and its impact in counteracting Aβ toxicity were studied in the Caenorhabditis elegans model. A dichloromethane extract of the roots of C. acaulis was prepared and characterised via gas-liquid-chromatography/mass-spectrometry (GLC-MS). The in vitro antioxidant activity was confirmed via 2,2-diphenyl-1-picrylhydracyl assay. The extract was further separated by thin layer chromatography into two fractions, one of which was a fraction of the dichloromethane extract of C. acaulis containing mostly Carlina oxide (CarOx). Different strains of C. elegans were employed to study the expression of hsp-16.2p::GFP as a marker for oxidative stress, delocalisation of the transcription factor DAF-16 as a possible mechanism of antioxidant activity, the effect of the drug under lethal oxidative stress, and the effect against beta-amyloid (Aβ) toxicity in a paralysis assay. The C. acaulis extract and CarOx showed high antioxidant activity (stress reduction by 47% and 64%, respectively) in C. elegans and could activate the transcription factor DAF-16 which directs the expression of anti-stress genes. In paralysis assay, only the total extract was significantly active, delaying paralysis by 1.6 h. In conclusion, in vivo antioxidant activity was shown for C. acaulis for the first time in the C. elegans model. The active antioxidant compound is Carlina oxide. This activity, however, is not sufficient to counteract Aβ toxicity. Other mechanisms and possibly other active compounds are involved in this effect. MDPI 2016-07-02 /pmc/articles/PMC6273941/ /pubmed/27384550 http://dx.doi.org/10.3390/molecules21070871 Text en © 2016 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC-BY) license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Link, Pille Roth, Kevin Sporer, Frank Wink, Michael Carlina acaulis Exhibits Antioxidant Activity and Counteracts Aβ Toxicity in Caenorhabditis elegans |
title | Carlina acaulis Exhibits Antioxidant Activity and Counteracts Aβ Toxicity in Caenorhabditis elegans |
title_full | Carlina acaulis Exhibits Antioxidant Activity and Counteracts Aβ Toxicity in Caenorhabditis elegans |
title_fullStr | Carlina acaulis Exhibits Antioxidant Activity and Counteracts Aβ Toxicity in Caenorhabditis elegans |
title_full_unstemmed | Carlina acaulis Exhibits Antioxidant Activity and Counteracts Aβ Toxicity in Caenorhabditis elegans |
title_short | Carlina acaulis Exhibits Antioxidant Activity and Counteracts Aβ Toxicity in Caenorhabditis elegans |
title_sort | carlina acaulis exhibits antioxidant activity and counteracts aβ toxicity in caenorhabditis elegans |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6273941/ https://www.ncbi.nlm.nih.gov/pubmed/27384550 http://dx.doi.org/10.3390/molecules21070871 |
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