Cargando…
Regulatory role and mechanism of the inhibition of the Mcl-1 pathway during apoptosis and polarization of H37Rv-infected macrophages
BACKGROUND: Myeloid cell leukemia-1 (Mcl-1) plays an important role in the clearance of Mycobacterium tuberculosis (MTB) infection. It has the effect of anti-apoptosis, protecting macrophages that have engulfed pathogens and preventing pathogen clearance. Meanwhile, the MAPK signaling pathway plays...
Autores principales: | , , , , , , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Lippincott Williams & Wilkins
2020
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7572003/ https://www.ncbi.nlm.nih.gov/pubmed/33080678 http://dx.doi.org/10.1097/MD.0000000000022438 |
_version_ | 1783597259201445888 |
---|---|
author | Han, Ling Lu, Yang Wang, Xiaofang Zhang, Shujun Wang, Yingzi Wu, Fang Zhang, Wanjiang Wang, Xinmin Zhang, Le |
author_facet | Han, Ling Lu, Yang Wang, Xiaofang Zhang, Shujun Wang, Yingzi Wu, Fang Zhang, Wanjiang Wang, Xinmin Zhang, Le |
author_sort | Han, Ling |
collection | PubMed |
description | BACKGROUND: Myeloid cell leukemia-1 (Mcl-1) plays an important role in the clearance of Mycobacterium tuberculosis (MTB) infection. It has the effect of anti-apoptosis, protecting macrophages that have engulfed pathogens and preventing pathogen clearance. Meanwhile, the MAPK signaling pathway plays a significant role in regulating Mcl-1 expression during tuberculosis infection. In the case of latent infection and active infection, the apoptosis and polarization of macrophages have a great influence during MTB infection, so we discussed the effect of Mcl-1 on apoptosis and polarization. Then, further discussed its mechanism. METHODS: An infected RAW264.7 macrophage model was established to investigate the regulatory role and mechanism of the Mcl-1 pathway inhibition during apoptosis and polarization of H37Rv infection. First, Mcl-1 protein and mRNA was identified by western blotting and Real-Time Polymerase Chain Reaction (RT-PCR). RAW264.7 macrophage apoptosis was detected by flow cytometry. RT-PCR was utilized to detect Bax, Caspase-3, Cyt-c and Bcl-2 mRNA expression. Next, Then the expression levels of inflammation factors CD86, CD206, iNOS, Fizz1, IL-6, IL-10, TNF-α, and TGF-β was detected by ELISA. SEM was used to observe macrophages phenotype. Finally, Bax, Bcl-2 and Bcl-xl the expression was detected by western blotting. Confocal microscopy was used to analyze mitochondrial membrane potential using the JC-10 kit. RESULTS: In this study, we found that inhibiting the Mcl-1 expression signaling pathway led to infection by different virulence Mycobacterium tuberculosis, as well as changes in Mcl-1 protein and mRNA expression. Concomitantly macrophage apoptosis rate also changed, While, two phenotypic states of M1 and M2 appeared in the infected cells. We also found that the mitochondrial pathway was activated, the expression of its related genes Bax, casepase3, and Cyt-c, increased, whereas that of Bcl-2 decreased, and the mitochondrial membrane depolarization function was changed. CONCLUSIONS: We found that Mcl-1 affected the apoptosis and polarization of macrophages infected by Mycobacterium tuberculosis, mainly M1 in the early stage and M2 in the later stage. In addition, mitochondria played a crucial role in this process. |
format | Online Article Text |
id | pubmed-7572003 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | Lippincott Williams & Wilkins |
record_format | MEDLINE/PubMed |
spelling | pubmed-75720032020-10-29 Regulatory role and mechanism of the inhibition of the Mcl-1 pathway during apoptosis and polarization of H37Rv-infected macrophages Han, Ling Lu, Yang Wang, Xiaofang Zhang, Shujun Wang, Yingzi Wu, Fang Zhang, Wanjiang Wang, Xinmin Zhang, Le Medicine (Baltimore) 4900 BACKGROUND: Myeloid cell leukemia-1 (Mcl-1) plays an important role in the clearance of Mycobacterium tuberculosis (MTB) infection. It has the effect of anti-apoptosis, protecting macrophages that have engulfed pathogens and preventing pathogen clearance. Meanwhile, the MAPK signaling pathway plays a significant role in regulating Mcl-1 expression during tuberculosis infection. In the case of latent infection and active infection, the apoptosis and polarization of macrophages have a great influence during MTB infection, so we discussed the effect of Mcl-1 on apoptosis and polarization. Then, further discussed its mechanism. METHODS: An infected RAW264.7 macrophage model was established to investigate the regulatory role and mechanism of the Mcl-1 pathway inhibition during apoptosis and polarization of H37Rv infection. First, Mcl-1 protein and mRNA was identified by western blotting and Real-Time Polymerase Chain Reaction (RT-PCR). RAW264.7 macrophage apoptosis was detected by flow cytometry. RT-PCR was utilized to detect Bax, Caspase-3, Cyt-c and Bcl-2 mRNA expression. Next, Then the expression levels of inflammation factors CD86, CD206, iNOS, Fizz1, IL-6, IL-10, TNF-α, and TGF-β was detected by ELISA. SEM was used to observe macrophages phenotype. Finally, Bax, Bcl-2 and Bcl-xl the expression was detected by western blotting. Confocal microscopy was used to analyze mitochondrial membrane potential using the JC-10 kit. RESULTS: In this study, we found that inhibiting the Mcl-1 expression signaling pathway led to infection by different virulence Mycobacterium tuberculosis, as well as changes in Mcl-1 protein and mRNA expression. Concomitantly macrophage apoptosis rate also changed, While, two phenotypic states of M1 and M2 appeared in the infected cells. We also found that the mitochondrial pathway was activated, the expression of its related genes Bax, casepase3, and Cyt-c, increased, whereas that of Bcl-2 decreased, and the mitochondrial membrane depolarization function was changed. CONCLUSIONS: We found that Mcl-1 affected the apoptosis and polarization of macrophages infected by Mycobacterium tuberculosis, mainly M1 in the early stage and M2 in the later stage. In addition, mitochondria played a crucial role in this process. Lippincott Williams & Wilkins 2020-10-16 /pmc/articles/PMC7572003/ /pubmed/33080678 http://dx.doi.org/10.1097/MD.0000000000022438 Text en Copyright © 2020 the Author(s). Published by Wolters Kluwer Health, Inc. http://creativecommons.org/licenses/by-nc/4.0 This is an open access article distributed under the terms of the Creative Commons Attribution-Non Commercial License 4.0 (CCBY-NC), where it is permissible to download, share, remix, transform, and buildup the work provided it is properly cited. The work cannot be used commercially without permission from the journal. http://creativecommons.org/licenses/by-nc/4.0 |
spellingShingle | 4900 Han, Ling Lu, Yang Wang, Xiaofang Zhang, Shujun Wang, Yingzi Wu, Fang Zhang, Wanjiang Wang, Xinmin Zhang, Le Regulatory role and mechanism of the inhibition of the Mcl-1 pathway during apoptosis and polarization of H37Rv-infected macrophages |
title | Regulatory role and mechanism of the inhibition of the Mcl-1 pathway during apoptosis and polarization of H37Rv-infected macrophages |
title_full | Regulatory role and mechanism of the inhibition of the Mcl-1 pathway during apoptosis and polarization of H37Rv-infected macrophages |
title_fullStr | Regulatory role and mechanism of the inhibition of the Mcl-1 pathway during apoptosis and polarization of H37Rv-infected macrophages |
title_full_unstemmed | Regulatory role and mechanism of the inhibition of the Mcl-1 pathway during apoptosis and polarization of H37Rv-infected macrophages |
title_short | Regulatory role and mechanism of the inhibition of the Mcl-1 pathway during apoptosis and polarization of H37Rv-infected macrophages |
title_sort | regulatory role and mechanism of the inhibition of the mcl-1 pathway during apoptosis and polarization of h37rv-infected macrophages |
topic | 4900 |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7572003/ https://www.ncbi.nlm.nih.gov/pubmed/33080678 http://dx.doi.org/10.1097/MD.0000000000022438 |
work_keys_str_mv | AT hanling regulatoryroleandmechanismoftheinhibitionofthemcl1pathwayduringapoptosisandpolarizationofh37rvinfectedmacrophages AT luyang regulatoryroleandmechanismoftheinhibitionofthemcl1pathwayduringapoptosisandpolarizationofh37rvinfectedmacrophages AT wangxiaofang regulatoryroleandmechanismoftheinhibitionofthemcl1pathwayduringapoptosisandpolarizationofh37rvinfectedmacrophages AT zhangshujun regulatoryroleandmechanismoftheinhibitionofthemcl1pathwayduringapoptosisandpolarizationofh37rvinfectedmacrophages AT wangyingzi regulatoryroleandmechanismoftheinhibitionofthemcl1pathwayduringapoptosisandpolarizationofh37rvinfectedmacrophages AT wufang regulatoryroleandmechanismoftheinhibitionofthemcl1pathwayduringapoptosisandpolarizationofh37rvinfectedmacrophages AT zhangwanjiang regulatoryroleandmechanismoftheinhibitionofthemcl1pathwayduringapoptosisandpolarizationofh37rvinfectedmacrophages AT wangxinmin regulatoryroleandmechanismoftheinhibitionofthemcl1pathwayduringapoptosisandpolarizationofh37rvinfectedmacrophages AT zhangle regulatoryroleandmechanismoftheinhibitionofthemcl1pathwayduringapoptosisandpolarizationofh37rvinfectedmacrophages |