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N-acetylcysteine (NAC) Attenuating Apoptosis and Autophagy in RAW264.7 Cells in Response to Incubation with Mycolic Acid from Bovine Mycobacterium tuberculosis Complex

Bovine tuberculosis is an airborne infectious disease caused by organisms of the Mycobacterium tuberculosis (MTB) complex. Mycolic acid (MA) is the main lipid component of the cell membrane of MTB. It is non-enzymatically reduced by NAD(P)H and further produces reactive oxygen species (ROS), which c...

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Autores principales: LIN, XUE, WEI, MENGMENG, SONG, FUYANG, XUE, DI, WANG, YUJIONG
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Exeley Inc. 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7324858/
https://www.ncbi.nlm.nih.gov/pubmed/32548987
http://dx.doi.org/10.33073/pjm-2020-026
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author LIN, XUE
WEI, MENGMENG
SONG, FUYANG
XUE, DI
WANG, YUJIONG
author_facet LIN, XUE
WEI, MENGMENG
SONG, FUYANG
XUE, DI
WANG, YUJIONG
author_sort LIN, XUE
collection PubMed
description Bovine tuberculosis is an airborne infectious disease caused by organisms of the Mycobacterium tuberculosis (MTB) complex. Mycolic acid (MA) is the main lipid component of the cell membrane of MTB. It is non-enzymatically reduced by NAD(P)H and further produces reactive oxygen species (ROS), which can cause oxidative stress in human cells. N-acetylcysteine (NAC) is a synthetic precursor of glutathione (GSH) and exhibits anti-ROS activity. However, the underlying mechanisms of its protective properties remain uncertain. Herein, after pre-incubation of RAW264.7 cells with NAC, the factors associated with apoptosis and autophagy were measured. Mechanistically, NAC could reduce MA-induced expression of pro-apoptotic and pro-autophagy proteins. At the mRNA level, NAC can inhibit AMPK and activate mTOR expression. The results indicate that NAC might regulate autophagy in RAW264.7 cells through the AMPK/mTOR pathway. To further prove the effect of NAC on MA, ICR mice were used to evaluate the lung injury. Hematoxylin-eosin (HE) staining was performed on the lung. The results show that NAC could reduce cell injury induced by MA. In conclusion, our research showed that NAC attenuates apoptosis and autophagy in response to incubation with mycolic acid.
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spelling pubmed-73248582020-07-01 N-acetylcysteine (NAC) Attenuating Apoptosis and Autophagy in RAW264.7 Cells in Response to Incubation with Mycolic Acid from Bovine Mycobacterium tuberculosis Complex LIN, XUE WEI, MENGMENG SONG, FUYANG XUE, DI WANG, YUJIONG Pol J Microbiol Microbiology Bovine tuberculosis is an airborne infectious disease caused by organisms of the Mycobacterium tuberculosis (MTB) complex. Mycolic acid (MA) is the main lipid component of the cell membrane of MTB. It is non-enzymatically reduced by NAD(P)H and further produces reactive oxygen species (ROS), which can cause oxidative stress in human cells. N-acetylcysteine (NAC) is a synthetic precursor of glutathione (GSH) and exhibits anti-ROS activity. However, the underlying mechanisms of its protective properties remain uncertain. Herein, after pre-incubation of RAW264.7 cells with NAC, the factors associated with apoptosis and autophagy were measured. Mechanistically, NAC could reduce MA-induced expression of pro-apoptotic and pro-autophagy proteins. At the mRNA level, NAC can inhibit AMPK and activate mTOR expression. The results indicate that NAC might regulate autophagy in RAW264.7 cells through the AMPK/mTOR pathway. To further prove the effect of NAC on MA, ICR mice were used to evaluate the lung injury. Hematoxylin-eosin (HE) staining was performed on the lung. The results show that NAC could reduce cell injury induced by MA. In conclusion, our research showed that NAC attenuates apoptosis and autophagy in response to incubation with mycolic acid. Exeley Inc. 2020-06 2020-06-04 /pmc/articles/PMC7324858/ /pubmed/32548987 http://dx.doi.org/10.33073/pjm-2020-026 Text en © 2020 Xue Lin et al. https://creativecommons.org/licenses/by-nc-nd/4.0/ https://creativecommons.org/licenses/by-nc-nd/4.0/This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License (https://creativecommons.org/licenses/by-nc-nd/4.0/).
spellingShingle Microbiology
LIN, XUE
WEI, MENGMENG
SONG, FUYANG
XUE, DI
WANG, YUJIONG
N-acetylcysteine (NAC) Attenuating Apoptosis and Autophagy in RAW264.7 Cells in Response to Incubation with Mycolic Acid from Bovine Mycobacterium tuberculosis Complex
title N-acetylcysteine (NAC) Attenuating Apoptosis and Autophagy in RAW264.7 Cells in Response to Incubation with Mycolic Acid from Bovine Mycobacterium tuberculosis Complex
title_full N-acetylcysteine (NAC) Attenuating Apoptosis and Autophagy in RAW264.7 Cells in Response to Incubation with Mycolic Acid from Bovine Mycobacterium tuberculosis Complex
title_fullStr N-acetylcysteine (NAC) Attenuating Apoptosis and Autophagy in RAW264.7 Cells in Response to Incubation with Mycolic Acid from Bovine Mycobacterium tuberculosis Complex
title_full_unstemmed N-acetylcysteine (NAC) Attenuating Apoptosis and Autophagy in RAW264.7 Cells in Response to Incubation with Mycolic Acid from Bovine Mycobacterium tuberculosis Complex
title_short N-acetylcysteine (NAC) Attenuating Apoptosis and Autophagy in RAW264.7 Cells in Response to Incubation with Mycolic Acid from Bovine Mycobacterium tuberculosis Complex
title_sort n-acetylcysteine (nac) attenuating apoptosis and autophagy in raw264.7 cells in response to incubation with mycolic acid from bovine mycobacterium tuberculosis complex
topic Microbiology
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7324858/
https://www.ncbi.nlm.nih.gov/pubmed/32548987
http://dx.doi.org/10.33073/pjm-2020-026
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