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Hu S, Wang F, Mao L, Jiang X, Luo Y, Qin X, Zou Z, Chen C, Yu C, Zhang J. NBR1-mediated autophagic degradation of caspase 8 protects vascular endothelial cells against arsenite-induced apoptotic cell death. Biochem Biophys Res Commun 2024; 715:150006. [PMID: 38678786 DOI: 10.1016/j.bbrc.2024.150006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2024] [Revised: 04/06/2024] [Accepted: 04/24/2024] [Indexed: 05/01/2024]
Abstract
Vascular endothelial cells play a critical role in maintaining the health of blood vessels, but dysfunction can lead to cardiovascular diseases. The impact of arsenite exposure on cardiovascular health is a significant concern due to its potential adverse effects. This study aims to explore how NBR1-mediated autophagy in vascular endothelial cells can protect against oxidative stress and apoptosis induced by arsenite. Initially, our observations revealed that arsenite exposure increased oxidative stress and triggered apoptotic cell death in human umbilical vein endothelial cells (HUVECs). However, treatment with the apoptosis inhibitor Z-VAD-FMK notably reduced arsenite-induced apoptosis. Additionally, arsenite activated the autophagy pathway and enhanced autophagic flux in HUVECs. Interestingly, inhibition of autophagy exacerbated arsenite-induced apoptotic cell death. Our findings also demonstrated the importance of autophagy receptor NBR1 in arsenite-induced cytotoxicity, as it facilitated the recruitment of caspase 8 to autophagosomes for degradation. The protective effect of NBR1 against arsenite-induced apoptosis was compromised when autophagy was inhibited using pharmacological inhibitors or through genetic knockdown of essential autophagy genes. Conversely, overexpression of NBR1 facilitated caspase 8 degradation and reduced apoptotic cell death in arsenite-treated HUVECs. In conclusion, our study highlights the vital role of NBR1-mediated autophagic degradation of caspase 8 in safeguarding vascular endothelial cells from arsenite-induced oxidative stress and apoptotic cell death. Targeting this pathway could offer a promising therapeutic approach to mitigate cardiovascular diseases associated with arsenite exposure.
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Affiliation(s)
- Siyao Hu
- Chongqing Key Laboratory for Pharmaceutical Metabolism Research, College of Pharmacy, Chongqing Medical University, 400016, Chongqing, People's Republic of China
| | - Fu Wang
- Department of Occupational and Environmental Health, School of Public Health, Chongqing Medical University, 400016, Chongqing, People's Republic of China
| | - Lejiao Mao
- Molecular Biology Laboratory of Respiratory Disease, Institute of Life Sciences, Chongqing Medical University, 400016, Chongqing, People's Republic of China
| | - Xuejun Jiang
- Department of Occupational and Environmental Health, School of Public Health, Chongqing Medical University, 400016, Chongqing, People's Republic of China
| | - Yilin Luo
- Molecular Biology Laboratory of Respiratory Disease, Institute of Life Sciences, Chongqing Medical University, 400016, Chongqing, People's Republic of China
| | - Xia Qin
- Department of Pharmacy, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, People's Republic of China
| | - Zhen Zou
- Molecular Biology Laboratory of Respiratory Disease, Institute of Life Sciences, Chongqing Medical University, 400016, Chongqing, People's Republic of China; Research Center for Environment and Human Health, School of Public Health, Chongqing Medical University, 400016, Chongqing, People's Republic of China
| | - Chengzhi Chen
- Department of Occupational and Environmental Health, School of Public Health, Chongqing Medical University, 400016, Chongqing, People's Republic of China; Research Center for Environment and Human Health, School of Public Health, Chongqing Medical University, 400016, Chongqing, People's Republic of China.
| | - Chao Yu
- Chongqing Key Laboratory for Pharmaceutical Metabolism Research, College of Pharmacy, Chongqing Medical University, 400016, Chongqing, People's Republic of China.
| | - Jun Zhang
- Molecular Biology Laboratory of Respiratory Disease, Institute of Life Sciences, Chongqing Medical University, 400016, Chongqing, People's Republic of China; Research Center for Environment and Human Health, School of Public Health, Chongqing Medical University, 400016, Chongqing, People's Republic of China.
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Xiao J, Zhang B, Yin S, Xie S, Huang K, Wang J, Yang W, Liu H, Zhang G, Liu X, Li Y, Nie D. Quercetin induces autophagy-associated death in HL-60 cells through CaMKKβ/AMPK/mTOR signal pathway. Acta Biochim Biophys Sin (Shanghai) 2022; 54:1244-56. [PMID: 36148953 DOI: 10.3724/abbs.2022117] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Acute myeloid leukemia (AML) is one of the most common malignancies of the hematopoietic progenitor cell in adults. Quercetin has gained recognition over the years because of its anti-cancer effect with minimal toxicity. Herein, we aim to investigate the anti-leukemia mechanism of quercetin and to decipher the signaling pathway of quercetin in HL-60 leukemic cells. We observed that quercetin induces apoptosis and autophagic cell death, in which both pathways play an important role in suppressing the viability of leukemia cells. Phosphorylated AMPK (p-AMPK) protein expressions are lower in primary AML cells, HL-60 cells, KG-1 and THP-1 cells than in peripheral blood monocular cells. After quercetin treatment, the expression of p-AMPK is increased while the expression of p-mTOR is decreased in a dose-dependent manner. Mechanistically, compound C, an AMPK phosphorylation inhibitor, upregulates the phosphorylation of mTOR and inhibits autophagy and apoptosis in quercetin-induced HL-60 cells, while silencing of CaMKKβ inhibits the quercetin-induced phosphorylation of AMPK, resulting in increased mTOR phosphorylation. Furthermore, silencing of CaMKKβ inhibits the autophagy in HL-60 cells. Taken together, our data delineate that quercetin plays its anti-leukemia role by inhibiting cell viability and inducing apoptosis and autophagy in leukemia cells. Quercetin inhibits the phosphorylation of mTOR by regulating the activity of AMPK, thus playing a role in the regulation of autophagy and apoptosis. CaMKKβ is a potential upstream molecule for AMPK/mTOR signaling pathway, through which quercetin induces autophagy in HL-60 cells.
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Di Domenico M, Ballini A, Boccellino M, Scacco S, Lovero R, Charitos IA, Santacroce L. The Intestinal Microbiota May Be a Potential Theranostic Tool for Personalized Medicine. J Pers Med 2022; 12:523. [PMID: 35455639 PMCID: PMC9024566 DOI: 10.3390/jpm12040523] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2022] [Revised: 03/09/2022] [Accepted: 03/22/2022] [Indexed: 12/12/2022] Open
Abstract
The human intestine is colonized by a huge number of microorganisms from the moment of birth. This set of microorganisms found throughout the human body, is called the microbiota; the microbiome indicates the totality of genes that the microbiota can express, i.e., its genetic heritage. Thus, microbiota participates in and influences the proper functioning of the organism. The microbiota is unique for each person; it differs in the types of microorganisms it contains, the number of each microorganism, and the ratio between them, but mainly it changes over time and under the influence of many factors. Therefore, the correct functioning of the human body depends not only on the expression of its genes but also on the expression of the genes of the microorganisms it coexists with. This fact makes clear the enormous interest of community science in studying the relationship of the human microbiota with human health and the incidence of disease. The microbiota is like a unique personalized “mold” for each person; it differs quantitatively and qualitatively for the microorganisms it contains together with the relationship between them, and it changes over time and under the influence of many factors. We are attempting to modulate the microbial components in the human intestinal microbiota over time to provide positive feedback on the health of the host, from intestinal diseases to cancer. These interventions to modulate the intestinal microbiota as well as to identify the relative microbiome (genetic analysis) can range from dietary (with adjuvant prebiotics or probiotics) to fecal transplantation. This article researches the recent advances in these strategies by exploring their advantages and limitations. Furthermore, we aim to understand the relationship between intestinal dysbiosis and pathologies, through the research of resident microbiota, that would allow the personalization of the therapeutic antibiotic strategy.
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Li Y, Zhao X, He B, Wu W, Zhang H, Yang X, Cheng W. Autophagy Activation by Hypoxia Regulates Angiogenesis and Apoptosis in Oxidized Low-Density Lipoprotein-Induced Preeclampsia. Front Mol Biosci 2021; 8:709751. [PMID: 34568425 PMCID: PMC8458810 DOI: 10.3389/fmolb.2021.709751] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2021] [Accepted: 08/12/2021] [Indexed: 01/07/2023] Open
Abstract
Objective: Autophagy influences a wide range of physiological and pathological processes in the human body. In this study, we aimed to investigate the role of autophagy in early-onset preeclampsia (EOPE); autophagy activation by hypoxia could rescue impaired angiogenesis and apoptosis in preeclampsia, leading by ox-LDL. Methods: Transmission electron microscopy was applied to identify autolysosomes in trophoblast cells of the placenta apical region. Quantitative real-time polymerase chain reaction, Western blot, flow cytometry, and wound-healing assays were adopted to determine autophagy activity, angiogenesis, and apoptosis in placenta tissues or HTR8/SVneo cells. Results: Autophagy activity was inhibited in the placenta of women who experienced EOPE; autophagy activation by hypoxia enhanced the migration ability, rescued ox-LDL–mediated impaired angiogenesis in HTR8/SVneo cells [vascular endothelial growth factor A (VEGFA) downregulation and FMS-like tyrosine kinase-1 (FLT1) upregulation], and protected against cell apoptosis (BAX downregulation). Conclusion: Autophagy could maintain the function of trophoblast cells by differentially regulating the expression of VEGFA and FLT1 and protecting against cell apoptosis at the maternal–fetal interface, potentially related to prevention of preeclampsia.
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Affiliation(s)
- Yamei Li
- International Peace Maternity and Child Health Hospital, Shanghai, China
| | - Xueya Zhao
- International Peace Maternity and Child Health Hospital, Shanghai, China
| | - Biwei He
- International Peace Maternity and Child Health Hospital, Shanghai, China
| | - Weibin Wu
- International Peace Maternity and Child Health Hospital, Shanghai, China.,Shagnhai Key Laboratory of Embryo Original Diseases, Shanghai, China
| | - Huijuan Zhang
- International Peace Maternity and Child Health Hospital, Shanghai, China
| | - Xingyu Yang
- International Peace Maternity and Child Health Hospital, Shanghai, China.,Shagnhai Key Laboratory of Embryo Original Diseases, Shanghai, China
| | - Weiwei Cheng
- International Peace Maternity and Child Health Hospital, Shanghai, China.,Shagnhai Key Laboratory of Embryo Original Diseases, Shanghai, China
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Begum S, Moreau F, Dufour A, Chadee K. Entamoeba histolytica exploits the autophagy pathway in macrophages to trigger inflammation in disease pathogenesis. Mucosal Immunol 2021; 14:1038-1054. [PMID: 33963264 DOI: 10.1038/s41385-021-00408-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Revised: 03/25/2021] [Accepted: 04/16/2021] [Indexed: 02/04/2023]
Abstract
The mechanism whereby Entamoeba histolytica (Eh) binding with macrophages at the intercellular junction triggers aggressive pro-inflammatory responses in disease pathogenesis is not well understood. The host intracellular protein degradation process autophagy and its regulatory proteins are involved in maintenance of cellular homeostasis and excessive inflammatory responses. In this study we unraveled how Eh hijacks the autophagy process in macrophages to dysregulate pro-inflammatory responses. Direct contact of live Eh with macrophages activated caspase-6 that induced rapid proteolytic degradation of the autophagy ATG16L1 protein complex independent of NLRP3 inflammasome and caspase-3/8 activation. Crohn's disease susceptible ATG16L1 T300A variant was highly susceptible to Eh-mediated degradation that augmented pro-inflammatory cytokines in mice. Quantitative proteomics revealed downregulation of autophagy and vesicle-mediated transport and upregulation of cysteine-type endopeptidase pathways in response to Eh. We conclude during Eh-macrophage outside-in signaling, ATG16L1 protein complex plays an overlooked regulatory role in shaping the pro-inflammatory landscape in amebiasis.
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Affiliation(s)
- Sharmin Begum
- Departments of Microbiology, Immunology and Infectious Diseases, Calgary, AB, Canada
| | - France Moreau
- Departments of Microbiology, Immunology and Infectious Diseases, Calgary, AB, Canada
| | - Antoine Dufour
- Physiology and Pharmacology, Snyder Institute for Chronic Diseases, University of Calgary, Calgary, AB, Canada.,Biochemistry and Molecular Biology, Snyder Institute for Chronic Diseases, University of Calgary, Calgary, AB, Canada
| | - Kris Chadee
- Departments of Microbiology, Immunology and Infectious Diseases, Calgary, AB, Canada.
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Xu Q, Li YC, Du C, Wang LN, Xiao YH. Effects of Apigenin on the Expression of LOX-1, Bcl-2, and Bax in Hyperlipidemia Rats. Chem Biodivers 2021; 18:e2100049. [PMID: 34118114 DOI: 10.1002/cbdv.202100049] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2021] [Accepted: 06/11/2021] [Indexed: 12/29/2022]
Abstract
We aimed to investigate the impact of apigenin on LOX-1, Bcl-2, and Bax expression in hyperlipidemia rats and explore the possible molecular pathological mechanism of apigenin in improving hyperlipidemia and preventing atherosclerosis. In hyperlipidemia models, the levels of total cholesterol (TC), triglyceride (TG), low-density lipoprotein cholesterol (LDL-c) and the LOX-1 protein expression were apparently increased (P<0.01), while the high-density lipoprotein cholesterol (HDL-c) levels and the ratio of Bcl-2/Bax were reduced significantly (P<0.01) in comparison with the standard control group. After the treatment of apigenin, the levels of TC, TG, LDL-c, and the LOX-1 protein expression were noticeably decreased (P<0.01), while the levels of HDL-c and the Bcl-2/Bax ratio were increased (P<0.01). The intima was thickened and had protrusions in the hyperlipidemia model group compared to the normal control group. In comparison with the atherosclerosis model group, the degree of aortic lesions in the low-dose, middle-dose, high-dose groups was alleviated. Apigenin can reduce the level of blood lipid, improve hyperlipidemia, and prevent atherosclerosis in hyperlipidemia rats. The molecular mechanism may be related to inhibiting LOX-1 gene expression and increasing the Bcl-2/Bax ratio.
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Affiliation(s)
- Qian Xu
- Department of Biochemistry, Chengde Medical University, Chengde, 067000, P. R. China
| | - Yan-Chao Li
- Department of Biochemistry, Chengde Medical University, Chengde, 067000, P. R. China
| | - Chao Du
- Department of Biochemistry, Chengde Medical University, Chengde, 067000, P. R. China
| | - Li-Na Wang
- Department of Biochemistry, Chengde Medical University, Chengde, 067000, P. R. China
| | - Yan-Hong Xiao
- Department of Biochemistry, Chengde Medical University, Chengde, 067000, P. R. China
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Chen M, Dai Y, Liu S, Fan Y, Ding Z, Li D. TFEB Biology and Agonists at a Glance. Cells 2021; 10:333. [PMID: 33562649 DOI: 10.3390/cells10020333] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2020] [Revised: 01/19/2021] [Accepted: 01/25/2021] [Indexed: 12/11/2022] Open
Abstract
Autophagy is a critical regulator of cellular survival, differentiation, development, and homeostasis, dysregulation of which is associated with diverse diseases including cancer and neurodegenerative diseases. Transcription factor EB (TFEB), a master transcriptional regulator of autophagy and lysosome, can enhance autophagic and lysosomal biogenesis and function. TFEB has attracted a lot of attention owing to its ability to induce the intracellular clearance of pathogenic factors in a variety of disease models, suggesting that novel therapeutic strategies could be based on the modulation of TFEB activity. Therefore, TFEB agonists are a promising strategy to ameliorate diseases implicated with autophagy dysfunction. Recently, several TFEB agonists have been identified and preclinical or clinical trials are applied. In this review, we present an overview of the latest research on TFEB biology and TFEB agonists.
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