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Zheng X, Pang Y, Hasenbilige, Yang Y, Li Q, Liu Y, Cao J. ATF4-mediated different mode of interaction between autophagy and mTOR determines cell fate dependent on the level of ER stress induced by Cr(VI). ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2024; 281:116639. [PMID: 38964069 DOI: 10.1016/j.ecoenv.2024.116639] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2024] [Revised: 05/31/2024] [Accepted: 06/21/2024] [Indexed: 07/06/2024]
Abstract
Hexavalent chromium [Cr(VI)] exists widely in occupational environments. The mechanistic target of rapamycin (mTOR) has been well-documented to regulate autophagy negatively. However, we found that low concentration of Cr(VI) (0.2 μM) elevated both mTOR and autophagy and promote cell survival. Conversely, high concentration of Cr(VI) (6 μM) caused cell death by inhibiting mTOR and subsequently inducing autophagy. Tunicamycin (Tm), as an Endoplasmic reticulum (ER) stress activator was used to induce mild ER stress at 0.1 μg/ml and it activated both autophagy and mTOR, which also caused cell migration in a similar manner to that observed with low concentration of Cr(VI). Severe ER stress caused by Tm (2 μg/ml) decreased mTOR, increased autophagy and then inhibited cell migration, which was the same as 6 μM Cr(VI) treatment, although Cr(VI) in high concentration inhibited ER stress. Activating transcription factor 4 (ATF4), a downstream target of ER stress, only increased under mild ER stress but decreased under severe ER stress and 6 μM Cr(VI) treatment. Chromatin immunoprecipitation (ChIP) experiment indicated that ATF4 could bind to the promoter of ATG4B and AKT1. To sum up, our data revealed that mild ER stress induced by low concentration of Cr(VI) could enhance transcriptional regulation of ATG4B and AKT1 by ATF4, which induced both autophagy and mTOR to promote cell viability.
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Affiliation(s)
- Xin Zheng
- Department of Anesthesiology, Second Hospital of Dalian Medical University, No. 467 Zhongshan Road, Dalian 116027, China
| | - Yuxin Pang
- Department of Occupational and Environmental Health, Dalian Medical University, No. 9 W. Lvshun South Road, Dalian 116044, China
| | - Hasenbilige
- Department of Occupational and Environmental Health, Dalian Medical University, No. 9 W. Lvshun South Road, Dalian 116044, China
| | - Yanqiu Yang
- Department of Occupational and Environmental Health, Dalian Medical University, No. 9 W. Lvshun South Road, Dalian 116044, China
| | - Qiujuan Li
- Department of Occupational and Environmental Health, Dalian Medical University, No. 9 W. Lvshun South Road, Dalian 116044, China
| | - Yong Liu
- School of Life and Pharmaceutical Sciences, Dalian University of Technology, Panjin 124221, China.
| | - Jun Cao
- Department of Occupational and Environmental Health, Dalian Medical University, No. 9 W. Lvshun South Road, Dalian 116044, China.
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2
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Song X, Sun J, Liu H, Mushtaq A, Huang Z, Li D, Zhang L, Chen F. Lycopene Alleviates Endoplasmic Reticulum Stress in Steatohepatitis through Inhibition of the ASK1-JNK Signaling Pathway. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2024; 72:7832-7844. [PMID: 38544357 DOI: 10.1021/acs.jafc.3c08108] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2024]
Abstract
Lycopene has been proven to alleviate nonalcoholic steatohepatitis (NASH), but the precise mechanisms are inadequately elucidated. In this study, we found a previously unknown regulatory effect of lycopene on the apoptosis signal-regulating kinase 1 (ASK1) signaling pathway in both in vivo and in vitro models. Lycopene supplementation (3 and 6 mg/kg/day) exhibited a significant reduction in lipid accumulation, inflammation, and fibrosis of the liver in mice fed with a high-fat/high-cholesterol diet or a methionine-choline-deficient diet. RNA sequencing uncovered that the mitogen-activated protein kinases signaling pathway, which is closely associated with inflammation and endoplasmic reticulum (ER) stress, was significantly downregulated by lycopene. Furthermore, we found lycopene ameliorated ER swelling and decreased the expression levels of ER stress markers (i.e., immunoglobulin heavy chain binding protein, C/EBP homologous protein, and X-box binding protein 1s). Especially, the inositol-requiring enzyme 1α involved in the ASK1 phosphorylation was inhibited by lycopene, resulting in the decline of the subsequent c-Jun N-terminal kinase (JNK) signaling cascade. ASK1 inhibitor DQOP-1 eliminated the lycopene-induced inhibition of the ASK1-JNK pathway in oleic acid and palmitic acid-induced HepG2 cells. Molecular docking further indicated hydrophobic interactions between lycopene and ASK1. Collectively, our research indicates that lycopene can alleviate ER stress and attenuate inflammation cascades and lipid accumulation by inhibiting the ASK1-JNK pathway.
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Affiliation(s)
- Xunyu Song
- College of Food Science and Nutritional Engineering, National Engineering Research Centre for Fruit and Vegetable Processing, Key Laboratory of Fruits and Vegetables Processing, Ministry of Agriculture; Engineering Research Centre for Fruits and Vegetables Processing, Ministry of Education, China Agricultural University, Beijing 100083, China
| | - Jun Sun
- College of Food Science and Nutritional Engineering, National Engineering Research Centre for Fruit and Vegetable Processing, Key Laboratory of Fruits and Vegetables Processing, Ministry of Agriculture; Engineering Research Centre for Fruits and Vegetables Processing, Ministry of Education, China Agricultural University, Beijing 100083, China
| | - Hanxiong Liu
- School of Food Science and Technology, National Engineering Research Center of Seafood, Dalian Polytechnic University, Dalian 116034, China
| | - Aroosa Mushtaq
- College of Food Science and Nutritional Engineering, National Engineering Research Centre for Fruit and Vegetable Processing, Key Laboratory of Fruits and Vegetables Processing, Ministry of Agriculture; Engineering Research Centre for Fruits and Vegetables Processing, Ministry of Education, China Agricultural University, Beijing 100083, China
| | - Zhoumei Huang
- College of Food Science and Nutritional Engineering, National Engineering Research Centre for Fruit and Vegetable Processing, Key Laboratory of Fruits and Vegetables Processing, Ministry of Agriculture; Engineering Research Centre for Fruits and Vegetables Processing, Ministry of Education, China Agricultural University, Beijing 100083, China
| | - Daotong Li
- College of Food Science and Nutritional Engineering, National Engineering Research Centre for Fruit and Vegetable Processing, Key Laboratory of Fruits and Vegetables Processing, Ministry of Agriculture; Engineering Research Centre for Fruits and Vegetables Processing, Ministry of Education, China Agricultural University, Beijing 100083, China
| | - Lujia Zhang
- College of Food Science and Nutritional Engineering, National Engineering Research Centre for Fruit and Vegetable Processing, Key Laboratory of Fruits and Vegetables Processing, Ministry of Agriculture; Engineering Research Centre for Fruits and Vegetables Processing, Ministry of Education, China Agricultural University, Beijing 100083, China
| | - Fang Chen
- College of Food Science and Nutritional Engineering, National Engineering Research Centre for Fruit and Vegetable Processing, Key Laboratory of Fruits and Vegetables Processing, Ministry of Agriculture; Engineering Research Centre for Fruits and Vegetables Processing, Ministry of Education, China Agricultural University, Beijing 100083, China
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3
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Dougé A, Vituret C, Carraro V, Parry L, Coudy-Gandilhon C, Lemal R, Combaret L, Maurin AC, Averous J, Jousse C, Bay JO, Verrelle P, Fafournoux P, Bruhat A, Rouzaire P. Temporal regulation of transgene expression controlled by amino acid availability in human T cells. HLA 2024; 103:e15252. [PMID: 37848366 DOI: 10.1111/tan.15252] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2023] [Revised: 07/12/2023] [Accepted: 09/28/2023] [Indexed: 10/19/2023]
Abstract
T cell therapy strategies, from allogeneic stem cell transplantation toward genetically-modified T cells infusion, develop powerful anti-tumor effects but are often accompanied by side effects and their efficacy remains sometimes to be improved. It therefore appears important to provide a flexible and easily reversible gene expression regulation system to control T cells activity. We developed a gene expression regulation technology that exploits the physiological GCN2-ATF4 pathway's ability to induce gene expression in T cells in response to one essential amino acid deficiency. We first demonstrated the functionality of NUTRIREG in human T cells by transient expression of reporter genes. We then validated that NUTRIREG can be used in human T cells to transiently express a therapeutic gene such as IL-10. Overall, our results represent a solid basis for the promising use of NUTRIREG to regulate transgene expression in human T cells in a reversible way, and more generally for numerous preventive or curative therapeutic possibilities in cellular immunotherapy strategies.
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Affiliation(s)
- Aurore Dougé
- Université Clermont Auvergne, INRAE, UNH, UMR1019, Clermont-Ferrand, France
- Medical Oncology Department, CHU Gabriel Montpied, Clermont-Ferrand, France
- EA Chelter 7453, Université Clermont Auvergne, Clermont-Ferrand, France
| | - Cyrielle Vituret
- Université Clermont Auvergne, INRAE, UNH, UMR1019, Clermont-Ferrand, France
| | - Valérie Carraro
- Université Clermont Auvergne, INRAE, UNH, UMR1019, Clermont-Ferrand, France
| | - Laurent Parry
- Université Clermont Auvergne, INRAE, UNH, UMR1019, Clermont-Ferrand, France
| | | | - Richard Lemal
- EA Chelter 7453, Université Clermont Auvergne, Clermont-Ferrand, France
- Histocompatibility and Immunogenetics Department, CHU Gabriel Montpied, Clermont-Ferrand, France
| | - Lydie Combaret
- Université Clermont Auvergne, INRAE, UNH, UMR1019, Clermont-Ferrand, France
| | | | - Julien Averous
- Université Clermont Auvergne, INRAE, UNH, UMR1019, Clermont-Ferrand, France
| | - Céline Jousse
- Université Clermont Auvergne, INRAE, UNH, UMR1019, Clermont-Ferrand, France
| | - Jacques-Olivier Bay
- Medical Oncology Department, CHU Gabriel Montpied, Clermont-Ferrand, France
- EA Chelter 7453, Université Clermont Auvergne, Clermont-Ferrand, France
| | - Pierre Verrelle
- EA Chelter 7453, Université Clermont Auvergne, Clermont-Ferrand, France
- Radiation Oncology Department, Institut Curie, PSL Research University, Paris, France
- Institut-Curie Recherche, U1196/UMR9187, Orsay, France
| | - Pierre Fafournoux
- Université Clermont Auvergne, INRAE, UNH, UMR1019, Clermont-Ferrand, France
| | - Alain Bruhat
- Université Clermont Auvergne, INRAE, UNH, UMR1019, Clermont-Ferrand, France
| | - Paul Rouzaire
- EA Chelter 7453, Université Clermont Auvergne, Clermont-Ferrand, France
- Histocompatibility and Immunogenetics Department, CHU Gabriel Montpied, Clermont-Ferrand, France
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4
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Asano S, Yamazaki K, Mori K, Hashimoto Y, Kawana S, Sato H, Naito H, Shikano K, Sogame Y, Kashimura M. C/EBP homogenous protein-induced Apoptosis in Endoplasmic Reticulum stress has been implicated in Kikuchi-Fujimoto Disease. J Clin Exp Hematop 2023; 63:270-274. [PMID: 37899238 PMCID: PMC10861369 DOI: 10.3960/jslrt.23034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2023] [Revised: 08/27/2023] [Accepted: 08/31/2023] [Indexed: 10/31/2023] Open
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Xiang J, Pompetti AJ, Faranda AP, Wang Y, Novo SG, Li DWC, Duncan MK. ATF4 May Be Essential for Adaption of the Ocular Lens to Its Avascular Environment. Cells 2023; 12:2636. [PMID: 37998373 PMCID: PMC10670291 DOI: 10.3390/cells12222636] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2023] [Revised: 10/30/2023] [Accepted: 11/03/2023] [Indexed: 11/25/2023] Open
Abstract
The late embryonic mouse lens requires the transcription factor ATF4 for its survival although the underlying mechanisms were unknown. Here, RNAseq analysis revealed that E16.5 Atf4 null mouse lenses downregulate the mRNA levels of lens epithelial markers as well as known markers of late lens fiber cell differentiation. However, a comparison of this list of differentially expressed genes (DEGs) with other known transcriptional regulators of lens development indicated that ATF4 expression is not directly controlled by the previously described lens gene regulatory network. Pathway analysis revealed that the Atf4 DEG list was enriched in numerous genes involved in nutrient transport, amino acid biosynthesis, and tRNA charging. These changes in gene expression likely result in the observed reductions in lens free amino acid and glutathione levels, which would result in the observed low levels of extractable lens protein, finally leading to perinatal lens disintegration. These data demonstrate that ATF4, via its function in the integrated stress response, is likely to play a crucial role in mediating the adaption of the lens to the avascularity needed to maintain lens transparency.
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Affiliation(s)
- Jiawen Xiang
- Department of Biological Sciences, University of Delaware, Newark, DE 19716, USA
- The State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou 510230, China
| | - Anthony J. Pompetti
- Department of Biological Sciences, University of Delaware, Newark, DE 19716, USA
| | - Adam P. Faranda
- Department of Biological Sciences, University of Delaware, Newark, DE 19716, USA
| | - Yan Wang
- Department of Biological Sciences, University of Delaware, Newark, DE 19716, USA
| | - Samuel G. Novo
- Department of Biological Sciences, University of Delaware, Newark, DE 19716, USA
| | - David Wan-Cheng Li
- The State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou 510230, China
| | - Melinda K. Duncan
- Department of Biological Sciences, University of Delaware, Newark, DE 19716, USA
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Chen F, Sun J, Wang Y, Grunberger JW, Zheng Z, Khurana N, Xu X, Zhou X, Ghandehari H, Zhang J. Silica nanoparticles induce ovarian granulosa cell apoptosis via activation of the PERK-ATF4-CHOP-ERO1α pathway-mediated IP3R1-dependent calcium mobilization. Cell Biol Toxicol 2023; 39:1715-1734. [PMID: 36346508 PMCID: PMC10604358 DOI: 10.1007/s10565-022-09776-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2022] [Accepted: 10/06/2022] [Indexed: 11/10/2022]
Abstract
Ambient particulate matters (PMs) have adverse effects in human and animal female reproductive health. Silica nanoparticles (SNPs), as a major component of PMs, can induce follicular atresia via the promotion of ovarian granulosa cell apoptosis. However, the molecular mechanisms of apoptosis induced by SNPs are not very clear. This work focuses on revealing the mechanisms of ER stress on SNP-induced apoptosis. Our results showed that spherical Stöber SNPs (110 nm, 25.0 mg/kg b.w.) induced follicular atresia via the promotion of granulosa cell apoptosis by intratracheal instillation in vivo; meanwhile, SNPs decreased the viability and increase apoptosis in granulosa cells in vitro. SNPs were taken up and accumulated in the vesicles of granulosa cells. Additionally, our results found that SNPs increased calcium ion (Ca2+) concentration in granulosa cell cytoplasm. Furthermore, SNPs activated ER stress via an increase in the PERK and ATF6 pathway-related protein levels and IP3R1-dependent calcium mobilization via an increase in IP3R1 level. In addition, 4-PBA restored IP3R1-dependent calcium mobilization and decreased apoptosis via the inhibition of ER stress. The ATF4-C/EBP homologous protein (CHOP)-ER oxidoreductase 1 alpha (ERO1α) pathway regulated SNP-induced IP3R1-dependent calcium mobilization and cell apoptosis via ATF4, CHOP, and ERO1α depletion in ovarian granulosa cells. Herein, we demonstrate that ER stress cooperated in SNP-induced ovarian toxicity via activation of IP3R1-mediated calcium mobilization, leading to apoptosis, in which the PERK-ATF4-CHOP-ERO1α pathway plays an essential role in ovarian granulosa cells.
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Affiliation(s)
- Fenglei Chen
- College of Veterinary Medicine, Yangzhou University, Yangzhou, 225009, Jiangsu, People's Republic of China.
- Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, 225009, Jiangsu, People's Republic of China.
- Joint International Research Laboratory of Agriculture and Agri-Product Safety of the Ministry of Education of China, Yangzhou University, Yangzhou, 225009, Jiangsu, People's Republic of China.
| | - Jiarong Sun
- College of Veterinary Medicine, Yangzhou University, Yangzhou, 225009, Jiangsu, People's Republic of China
- Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, 225009, Jiangsu, People's Republic of China
| | - Yujing Wang
- College of Veterinary Medicine, Yangzhou University, Yangzhou, 225009, Jiangsu, People's Republic of China
- Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, 225009, Jiangsu, People's Republic of China
| | - Jason William Grunberger
- Department of Pharmaceutics and Pharmaceutical Chemistry, University of Utah, Salt Lake City, UT, USA
- Utah Center for Nanomedicine, University of Utah, Salt Lake City, UT, USA
| | - Zhen Zheng
- College of Veterinary Medicine, Yangzhou University, Yangzhou, 225009, Jiangsu, People's Republic of China
- Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, 225009, Jiangsu, People's Republic of China
| | - Nitish Khurana
- Department of Pharmaceutics and Pharmaceutical Chemistry, University of Utah, Salt Lake City, UT, USA
- Utah Center for Nanomedicine, University of Utah, Salt Lake City, UT, USA
| | - Xianyu Xu
- College of Veterinary Medicine, Yangzhou University, Yangzhou, 225009, Jiangsu, People's Republic of China
- Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, 225009, Jiangsu, People's Republic of China
| | - Xin Zhou
- College of Veterinary Medicine, Yangzhou University, Yangzhou, 225009, Jiangsu, People's Republic of China
- Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, 225009, Jiangsu, People's Republic of China
- Joint International Research Laboratory of Agriculture and Agri-Product Safety of the Ministry of Education of China, Yangzhou University, Yangzhou, 225009, Jiangsu, People's Republic of China
| | - Hamidreza Ghandehari
- Department of Pharmaceutics and Pharmaceutical Chemistry, University of Utah, Salt Lake City, UT, USA
- Utah Center for Nanomedicine, University of Utah, Salt Lake City, UT, USA
- Department of Biomedical Engineering, University of Utah, Salt Lake City, UT, USA
| | - Jinlong Zhang
- College of Veterinary Medicine, Yangzhou University, Yangzhou, 225009, Jiangsu, People's Republic of China.
- Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, 225009, Jiangsu, People's Republic of China.
- Joint International Research Laboratory of Agriculture and Agri-Product Safety of the Ministry of Education of China, Yangzhou University, Yangzhou, 225009, Jiangsu, People's Republic of China.
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7
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Yurttas AG, Okat Z, Elgun T, Cifci KU, Sevim AM, Gul A. Genetic deviation associated with photodynamic therapy in HeLa cell. Photodiagnosis Photodyn Ther 2023; 42:103346. [PMID: 36809810 DOI: 10.1016/j.pdpdt.2023.103346] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2022] [Revised: 02/05/2023] [Accepted: 02/14/2023] [Indexed: 02/22/2023]
Abstract
Photodynamic therapy (PDT) is a method that is used in cancer treatment. The main therapeutic effect is the production of singlet oxygen (1O2). Phthalocyanines for PDT produce high singlet oxygen with absorbers of about 600-700 nm. AIM It is aimed to analyze cancer cell pathways by flow cytometry analysis and cancer-related genes with q-PCR device by applying phthalocyanine L1ZnPC, which we use as photosensitizer in photodynamic therapy, in HELA cell line. In this study, we investigate the molecular basis of L1ZnPC's anti-cancer activity. MATERIAL METHOD The cytotoxic effects of L1ZnPC, a phthalocyanine obtained from our previous study, in HELA cells were evaluated and it was determined that it led to a high rate of death as a result. The result of photodynamic therapy was analyzed using q-PCR. From the data received at the conclusion of this investigation, gene expression values were calculated, and expression levels were assessed using the 2-∆∆Ct method to examine the relative changes in these values. Cell death pathways were interpreted with the FLOW cytometer device. One-Way Analysis of Variance (ANOVA) and the Tukey-Kramer Multiple Comparison Test with Post-hoc Test were used for the statistical analysis. CONCLUSION In our study, it was observed that HELA cancer cells underwent apoptosis at a rate of 80% with drug application plus photodynamic therapy by flow cytometry method. According to q-PCR results, CT values of eight out of eighty-four genes were found to be significant and their association with cancer was evaluated. L1ZnPC is a new phthalocyanine used in this study and our findings should be supported by further studies. For this reason, different analyses are needed to be performed with this drug in different cancer cell lines. In conclusion, according to our results, this drug looks promising but still needs to be analyzed through new studies. It is necessary to examine in detail which signaling pathways they use and their mechanism of action. For this, additional experiments are required.
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Affiliation(s)
- Asiye Gok Yurttas
- Department of Biochemistry, Faculty of Pharmacy, Istanbul Health and Technology University, Istanbul, Turkey.
| | - Zehra Okat
- Department of Biochemistry, Faculty of Medicine, Marmara University, Istanbul, Turkey
| | - Tugba Elgun
- Medical Biology, Faculty of Medicine, Istanbul Biruni University, Istanbul, Turkey
| | - Kezban Ucar Cifci
- Division of Basic Sciences and Health, Hemp Research Institute, Yozgat Bozok University, Yozgat, Turkey; Department of Molecular Medicine, Institute of Health Sciences, University of Health Sciences, Turkey
| | - Altug Mert Sevim
- Department of Chemistry, Istanbul Technical University, Istanbul, Turkey
| | - Ahmet Gul
- Department of Chemistry, Istanbul Technical University, Istanbul, Turkey
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8
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Vo TTT, Wee Y, Cheng HC, Wu CZ, Chen YL, Tuan VP, Liu JF, Lin WN, Lee IT. Surfactin induces autophagy, apoptosis, and cell cycle arrest in human oral squamous cell carcinoma. Oral Dis 2023; 29:528-541. [PMID: 34181793 DOI: 10.1111/odi.13950] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2021] [Revised: 06/06/2021] [Accepted: 06/22/2021] [Indexed: 02/05/2023]
Abstract
OBJECTIVES To investigate the anticancer effects and underlying mechanisms of surfactin on human oral squamous cell carcinoma (OSCC). MATERIALS AND METHODS The capacity of surfactin to induce apoptosis, autophagy, and cell cycle arrest of two different human OSCC cell lines was investigated by cell viability, acridine orange staining, and cell cycle regulatory protein expression, respectively. The signaling network underlying these processes were determined by the analysis of reactive oxygen species (ROS) generation, nicotinamide adenine dinucleotide phosphate (NADPH) oxidase activity, endoplasmic reticulum (ER) stress-related protein levels, calcium release, mitogen-activated protein kinases activation, and cell cycle regulatory protein expression through corresponding reagents and experiments under various experimental conditions using specific pharmaceutical inhibitors or small interfering RNAs. RESULTS Surfactin was able to induce apoptosis through NADPH oxidase/ROS/ER stress/calcium-downregulated extracellular signal-regulated kinases 1/2 pathway. Surfactin could also lead to autophagy that shared the common regulatory signals with apoptosis pathway until calcium node. Cell cycle arrest at G2 /M phase caused by surfactin was demonstrated through p53 and p21 accumulation combined p34cdc2 , phosphorylated p34cdc2 , and cyclin B1 inhibition, which was regulated by NADPH oxidase-derived ROS. CONCLUSION Surfactin could induce apoptosis, autophagy, and cell cycle arrest in ROS-dependent manner, suggesting a multifaced anticancer agent for OSCC.
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Affiliation(s)
- Thi Thuy Tien Vo
- School of Dentistry, College of Oral Medicine, Taipei Medical University, Taipei, Taiwan
| | - Yinshen Wee
- Department of Pathology, University of Utah, Salt Lake City, UT, USA
| | - Hsin-Chung Cheng
- School of Dentistry, College of Oral Medicine, Taipei Medical University, Taipei, Taiwan.,Department of Dentistry, Taipei Medical University Hospital, Taipei, Taiwan
| | - Ching-Zong Wu
- School of Dentistry, College of Oral Medicine, Taipei Medical University, Taipei, Taiwan.,Department of Dentistry, Taipei Medical University Hospital, Taipei, Taiwan.,Department of Dentistry, Lotung Poh-Ai Hospital, Yilan, Taiwan
| | - Yuh-Lien Chen
- Department of Anatomy and Cell Biology, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Vo Phuoc Tuan
- Endoscopy Department, Cho Ray Hospital, Ho Chi Minh City, Vietnam
| | - Ju-Fang Liu
- School of Oral Hygiene, College of Oral Medicine, Taipei Medical University, Taipei, Taiwan
| | - Wei-Ning Lin
- Graduate Institute of Biomedical and Pharmaceutical Science, Fu Jen Catholic University, New Taipei City, Taiwan
| | - I-Ta Lee
- School of Dentistry, College of Oral Medicine, Taipei Medical University, Taipei, Taiwan
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9
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Plasma-Like Culture Medium for the Study of Viruses. mBio 2023; 14:e0203522. [PMID: 36515528 PMCID: PMC9973327 DOI: 10.1128/mbio.02035-22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Viral infections attract more and more attention, especially after the emergence of novel zoonotic coronaviruses and the monkeypox virus over the last 2 decades. Research on viruses is based to a great extent on mammalian cell lines that are permissive to the respective viruses. These cell lines are usually cultivated according to the protocols established in the 1950s to 1970s, although it is clear that classical media have a significant imprint on cell growth, phenotype, and especially metabolism. So, recently in the field of biochemistry and metabolomics novel culture media have been developed that resemble human blood plasma. As perturbations in metabolic and redox pathways during infection are considered significant factors of viral pathogenesis, these novel medium formulations should be adapted by the virology field. So far, there are only scarce data available on viral propagation efficiencies in cells cultivated in plasma-like media. But several groups have presented convincing data on the use of such media for cultivation of uninfected cells. The aim of the present review is to summarize the current state of research in the field of plasma-resembling culture media and to point out the influence of media on various cellular processes in uninfected cells that may play important roles in viral replication and pathogenesis in order to sensitize virology research to the use of such media.
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10
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GCN4 Enhances the Transcriptional Regulation of AreA by Interacting with SKO1 To Mediate Nitrogen Utilization in Ganoderma lucidum. Appl Environ Microbiol 2022; 88:e0132222. [PMID: 36342130 PMCID: PMC9680636 DOI: 10.1128/aem.01322-22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
Nitrogen is an essential nutrient for cell growth and proliferation. Limitations of nitrogen availability in organisms elicit a series of rapid transcriptional reprogramming mechanisms, which involve the participation of many transcription factors.
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11
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Brüggenthies JB, Fiore A, Russier M, Bitsina C, Brötzmann J, Kordes S, Menninger S, Wolf A, Conti E, Eickhoff JE, Murray PJ. A cell-based chemical-genetic screen for amino acid stress response inhibitors reveals torins reverse stress kinase GCN2 signaling. J Biol Chem 2022; 298:102629. [PMID: 36273589 PMCID: PMC9668732 DOI: 10.1016/j.jbc.2022.102629] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Revised: 10/07/2022] [Accepted: 10/10/2022] [Indexed: 11/06/2022] Open
Abstract
mTORC1 and GCN2 are serine/threonine kinases that control how cells adapt to amino acid availability. mTORC1 responds to amino acids to promote translation and cell growth while GCN2 senses limiting amino acids to hinder translation via eIF2α phosphorylation. GCN2 is an appealing target for cancer therapies because malignant cells can harness the GCN2 pathway to temper the rate of translation during rapid amino acid consumption. To isolate new GCN2 inhibitors, we created cell-based, amino acid limitation reporters via genetic manipulation of Ddit3 (encoding the transcription factor CHOP). CHOP is strongly induced by limiting amino acids and in this context, GCN2-dependent. Using leucine starvation as a model for essential amino acid sensing, we unexpectedly discovered ATP-competitive PI3 kinase-related kinase inhibitors, including ATR and mTOR inhibitors like torins, completely reversed GCN2 activation in a time-dependent way. Mechanistically, via inhibiting mTORC1-dependent translation, torins increased intracellular leucine, which was sufficient to reverse GCN2 activation and the downstream integrated stress response including stress-induced transcriptional factor ATF4 expression. Strikingly, we found that general translation inhibitors mirrored the effects of torins. Therefore, we propose that mTOR kinase inhibitors concurrently inhibit different branches of amino acid sensing by a dual mechanism involving direct inhibition of mTOR and indirect suppression of GCN2 that are connected by effects on the translation machinery. Collectively, our results highlight distinct ways of regulating GCN2 activity.
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Affiliation(s)
| | | | - Marion Russier
- Max Planck Institute for Biochemistry, Martinsried, Germany
| | | | | | | | | | | | - Elena Conti
- Max Planck Institute for Biochemistry, Martinsried, Germany
| | | | - Peter J. Murray
- Max Planck Institute for Biochemistry, Martinsried, Germany,For correspondence: Peter J. Murray
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12
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Márton M, Bánhegyi G, Gyöngyösi N, Kálmán EÉ, Pettkó‐Szandtner A, Káldi K, Kapuy O. A systems biological analysis of the ATF4-GADD34-CHOP regulatory triangle upon endoplasmic reticulum stress. FEBS Open Bio 2022; 12:2065-2082. [PMID: 36097827 PMCID: PMC9623533 DOI: 10.1002/2211-5463.13484] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2022] [Revised: 08/24/2022] [Accepted: 09/10/2022] [Indexed: 01/25/2023] Open
Abstract
Endoplasmic reticulum (ER) stress-dependent accumulation of incorrectly folded proteins leads to activation of the unfolded protein response. The role of the unfolded protein response (UPR) is to avoid cell damage and restore the homeostatic state by autophagy; however, excessive ER stress results in apoptosis. Here we investigated the ER stress-dependent feedback loops inside one of the UPR branches by focusing on PERK-induced ATF4 and its two targets, called CHOP and GADD34. Our goal was to qualitatively describe the dynamic behavior of the system by exploring the key regulatory motifs using both molecular and theoretical biological techniques. Using the HEK293T cell line as a model system, we confirmed that the life-or-death decision is strictly regulated. We investigated the dynamic characteristics of the crucial elements of the PERK pathway at both the RNA and protein level upon tolerable and excessive levels of ER stress. Of particular note, inhibition of GADD34 or CHOP resulted in various phenotypes upon high levels of ER stress. Our computer simulations suggest the existence of two new feedback loops inside the UPR. First, GADD34 seems to have a positive effect on ATF4 activity, while CHOP inhibits it. We claim that these newly described feedback loops ensure the fine-tuning of the ATF4-dependent stress response mechanism of the cell.
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Affiliation(s)
- Margita Márton
- Department of Molecular Biology at the Institute of Biochemistry and Molecular BiologySemmelweis UniversityBudapestHungary
| | - Gábor Bánhegyi
- Department of Molecular Biology at the Institute of Biochemistry and Molecular BiologySemmelweis UniversityBudapestHungary
| | - Norbert Gyöngyösi
- Department of Molecular Biology at the Institute of Biochemistry and Molecular BiologySemmelweis UniversityBudapestHungary
| | - Eszter Éva Kálmán
- Department of Molecular Biology at the Institute of Biochemistry and Molecular BiologySemmelweis UniversityBudapestHungary
| | | | - Krisztina Káldi
- Department of PhysiologySemmelweis UniversityBudapestHungary
| | - Orsolya Kapuy
- Department of Molecular Biology at the Institute of Biochemistry and Molecular BiologySemmelweis UniversityBudapestHungary
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13
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Haraguchi-Suzuki K, Kawabata-Iwakawa R, Suzuki T, Suto T, Takazawa T, Saito S. Local anesthetic lidocaine-inducible gene, growth differentiation factor-15 suppresses the growth of cancer cell lines. Sci Rep 2022; 12:14520. [PMID: 36008442 PMCID: PMC9411556 DOI: 10.1038/s41598-022-18572-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2022] [Accepted: 08/16/2022] [Indexed: 12/24/2022] Open
Abstract
Administration of local anesthetics, such as lidocaine, in the perioperative period improves outcomes of cancer patients. However, its precise mechanism is still unresolved. The growth of human cancer cell lines, including HeLa cells, are suppressed by lidocaine treatment. We identified that growth differentiation factor-15 (GDF-15) was commonly upregulated in lidocaine-treated cancer cell lines. GDF-15 is a divergent member of the transforming growth factor-β (TGF-β) superfamily and it is produced as an unprocessed pro-protein form and then cleaved to generate a mature form. In lidocaine-treated HeLa cells, increased production of GDF-15 in the endoplasmic reticulum (ER) was observed and unprocessed pro-protein form of GDF-15 was secreted extracellularly. Further, lidocaine induced apoptosis and apoptosis-inducible Tribbles homologue 3 (TRIB3) was also commonly upregulated in lidocaine-treated cancer cell lines. In addition, transcription factor C/EBP homologous protein (CHOP), which is a positive regulator of not only GDF-15 but TRIB3 was also induced by lidocaine. Lidocaine-induced growth suppression and apoptosis was suppressed by knockdown of GDF-15 or TRIB3 expression by small interference RNA (siRNA). These observations suggest that lidocaine suppresses the growth of cancer cells through increasing GDF-15 and TRIB3 expression, suggesting its potential application as cancer therapy.
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Affiliation(s)
- Keiko Haraguchi-Suzuki
- Intensive Care Unit, Gunma University Hospital, 3-39-15, Showa-machi, Maebashi, Gunma, 371-8511, Japan.
| | - Reika Kawabata-Iwakawa
- Division of Integrated Oncology Research, Initiative for Advanced Research, Gunma University, 3-39-15, Showa-machi, Maebashi, Gunma, 371-8511, Japan
| | - Toru Suzuki
- Laboratory for Immunogenetics, RIKEN Center for Integrative Medical Sciences, 1-7-22, Suehiro-cho, Tsurumi-ku, Yokohama, Kanagawa, 230-0045, Japan
| | - Takashi Suto
- Department of Anesthesiology, Gunma University Hospital, 3-39-15, Showa-machi, Maebashi, Gunma, 371-8511, Japan
| | - Tomonori Takazawa
- Intensive Care Unit, Gunma University Hospital, 3-39-15, Showa-machi, Maebashi, Gunma, 371-8511, Japan
| | - Shigeru Saito
- Department of Anesthesiology, Gunma University Hospital, 3-39-15, Showa-machi, Maebashi, Gunma, 371-8511, Japan
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14
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Structural and Functional Studies of S-(2-Carboxyethyl)-L-Cysteine and S-(2-Carboxyethyl)-l-Cysteine Sulfoxide. Molecules 2022; 27:molecules27165317. [PMID: 36014554 PMCID: PMC9414067 DOI: 10.3390/molecules27165317] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2022] [Revised: 08/18/2022] [Accepted: 08/18/2022] [Indexed: 11/16/2022] Open
Abstract
Insecticidal non-proteinogenic amino acid S-(2-carboxyethyl)-L-cysteine (β-CEC) and its assumed metabolite, S-(2-carboxyethyl)-l-cysteine sulfoxide (β-CECO), are present abundantly in a number of plants of the legume family. In humans, these amino acids may occur as a result of exposure to environmental acrylonitrile or acrylamide, and due to consumption of the legumes. The β-CEC molecule is a homolog of S-carboxymethyl-l-cysteine (carbocisteine, CMC), a clinically employed antioxidant and mucolytic drug. We report here detailed structural data for β-CEC and β-CECO, as well as results of in vitro studies evaluating cytotoxicity and the protective potential of the amino acids in renal tubular epithelial cells (RTECs) equipped with reporters for activity of seven stress-responsive transcription factors. In RTECs, β-CEC and the sulfoxide were not acutely cytotoxic, but activated the antioxidant Nrf2 pathway. β-CEC, but not the sulfoxide, induced the amino acid stress signaling, which could be moderated by cysteine, methionine, histidine, and tryptophan. β-CEC enhanced the cytotoxic effects of arsenic, cadmium, lead, and mercury, but inhibited the cytotoxic stress induced by cisplatin, oxaliplatin, and CuO nanoparticles and acted as an antioxidant in a copper-dependent oxidative DNA degradation assay. In these experiments, the structure and activities of β-CEC closely resembled those of CMC. Our data suggest that β-CEC may act as a mild activator of the cytoprotective pathways and as a protector from platinum drugs and environmental copper cytotoxicity.
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15
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Hossain MM, Toltin AC, Gamba LM, Molina MA. Deltamethrin-Evoked ER Stress Promotes Neuroinflammation in the Adult Mouse Hippocampus. Cells 2022; 11:1961. [PMID: 35741090 PMCID: PMC9222034 DOI: 10.3390/cells11121961] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2022] [Revised: 06/09/2022] [Accepted: 06/16/2022] [Indexed: 12/14/2022] Open
Abstract
Endoplasmic reticulum (ER) stress and neuroinflammation are involved in the pathogenesis of many neurodegenerative disorders. Previously, we reported that exposure to pyrethroid insecticide deltamethrin causes hippocampal ER stress apoptosis, a reduction in neurogenesis, and learning deficits in adult male mice. Recently, we found that deltamethrin exposure also increases the markers of neuroinflammation in BV2 cells. Here, we investigated the potential mechanistic link between ER stress and neuroinflammation following exposure to deltamethrin. We found that repeated oral exposure to deltamethrin (3 mg/kg) for 30 days caused microglial activation and increased gene expressions and protein levels of TNF-α, IL-1β, IL-6, gp91phox, 4HNE, and iNOS in the hippocampus. These changes were preceded by the induction of ER stress as the protein levels of CHOP, ATF-4, and GRP78 were significantly increased in the hippocampus. To determine whether induction of ER stress triggers the inflammatory response, we performed an additional experiment with mouse microglial cell (MMC) line. MMCs were treated with 0-5 µM deltamethrin for 24-48 h in the presence or absence of salubrinal, a pharmacological inhibitor of the ER stress factor eIF2α. We found that salubrinal (50 µM) prevented deltamethrin-induced ER stress, as indicated by decreased levels of CHOP and ATF-4, and attenuated the levels of GSH, 4-HNE, gp91phox, iNOS, ROS, TNF-α, IL-1β, and IL-6 in MMCs. Together, these results demonstrate that exposure to deltamethrin leads to ER stress-mediated neuroinflammation, which may subsequently contribute to neurodegeneration and cognitive impairment in mice.
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Affiliation(s)
- Muhammad M. Hossain
- Department of Environmental Health Sciences, Robert Stempel College of Public Health & Social Work, Florida International University, Miami, FL 33199, USA; (A.C.T.); (L.M.G.); (M.A.M.)
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16
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Parthasarathy G, Malhi H. Assessment of Lipotoxic Endoplasmic Reticulum (ER) Stress in Nonalcoholic Steatohepatitis (NASH). Methods Mol Biol 2022; 2455:243-254. [PMID: 35212999 PMCID: PMC9333415 DOI: 10.1007/978-1-0716-2128-8_19] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Hepatocyte lipotoxicity is a hallmark of nonalcoholic steatohepatitis (NASH), and lipid induced liver injury occurs, in part, via activation of endoplasmic reticulum (ER) stress. Consequently, the unfolded protein response (UPR) is initiated, driven by three key ER transmembrane proteins, resulting in downstream responses that are dynamic and interconnected. Thus, careful interrogation of these pathways is required to investigate the complex role of ER stress in NASH. Herein, we describe different mechanisms of, and in vitro assays for assessment of lipotoxic ER stress in mouse hepatocytes.
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Affiliation(s)
| | - Harmeet Malhi
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, MN, USA.
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17
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Bahamondes Lorca VA, Bastidas Mayorga BD, Tong L, Wu S. UVB-induced eIF2α phosphorylation in keratinocytes depends on decreased ATF4, GADD34 and CReP expression levels. Life Sci 2021; 286:120044. [PMID: 34637792 DOI: 10.1016/j.lfs.2021.120044] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2021] [Revised: 10/05/2021] [Accepted: 10/06/2021] [Indexed: 02/05/2023]
Abstract
AIM To elucidate the mechanism behind the sustained high levels of phosphorylated eIF2α in HaCaT cells post-UVB. MAIN METHODS In this study, expression levels of the machinery involved in the dephosphorylation of eIF2α (GADD34, CReP and PP1), as well as the PERK-eIF2α-ATF4-CHOP, IRE1α/XBP1s and ATF6α signaling cascades, were analyzed by western blot and fluorescence microscope. KEY FINDINGS Our data showed that UVB induces the phosphorylation of eIF2α, which induces the translation of ATF4 and consequently the expression of CHOP and GADD34. Nevertheless, UVB also suppresses the translation of ATF4 and GADD34 in HaCaT cells via a p-eIF2α independent mechanism. Therefore, the lack of ATF4, GADD34 and CReP is responsible for the sustained phosphorylation of eIF2α. Finally, our data also showed that UVB selectively modifies PERK and downregulates ATF6α expression but does not induce activation of the IRE1α/XBP1s pathway in HaCaT cells. SIGNIFICANCE Novel mechanism to explain the prolonged phosphorylation of eIF2α post-UVB irradiation.
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Affiliation(s)
- Verónica A Bahamondes Lorca
- Edison Biotechnology Institute, Ohio University, Athens, OH 45701, USA; Department of Chemistry and Biochemistry, Ohio University, Athens, OH 45701, USA; Departamento de Tecnología Médica, Facultad de Medicina, Universidad de Chile, Santiago, Chile
| | - Bernardo D Bastidas Mayorga
- Edison Biotechnology Institute, Ohio University, Athens, OH 45701, USA; Department of Chemistry and Biochemistry, Ohio University, Athens, OH 45701, USA
| | - Lingying Tong
- Edison Biotechnology Institute, Ohio University, Athens, OH 45701, USA; Department of Chemistry and Biochemistry, Ohio University, Athens, OH 45701, USA.
| | - Shiyong Wu
- Edison Biotechnology Institute, Ohio University, Athens, OH 45701, USA; Department of Chemistry and Biochemistry, Ohio University, Athens, OH 45701, USA.
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18
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Brocard M, Lu J, Hall B, Borah K, Moller-Levet C, Georgana I, Sorgeloos F, Beste DJV, Goodfellow IG, Locker N. Murine Norovirus Infection Results in Anti-inflammatory Response Downstream of Amino Acid Depletion in Macrophages. J Virol 2021; 95:e0113421. [PMID: 34346771 PMCID: PMC8475529 DOI: 10.1128/jvi.01134-21] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2021] [Accepted: 07/27/2021] [Indexed: 12/13/2022] Open
Abstract
Murine norovirus (MNV) infection results in a late translation shutoff that is proposed to contribute to the attenuated and delayed innate immune response observed both in vitro and in vivo. Recently, we further demonstrated the activation of the α subunit of eukaryotic initiation factor 2 (eIF2α) kinase GCN2 during MNV infection, which has been previously linked to immunomodulation and resistance to inflammatory signaling during metabolic stress. While viral infection is usually associated with activation of double-stranded RNA (dsRNA) binding pattern recognition receptor PKR, we hypothesized that the establishment of a metabolic stress in infected cells is a proviral event, exploited by MNV to promote replication through weakening the activation of the innate immune response. In this study, we used multi-omics approaches to characterize cellular responses during MNV replication. We demonstrate the activation of pathways related to the integrated stress response, a known driver of anti-inflammatory phenotypes in macrophages. In particular, MNV infection causes an amino acid imbalance that is associated with GCN2 and ATF2 signaling. Importantly, this reprogramming lacks the features of a typical innate immune response, with the ATF/CHOP target GDF15 contributing to the lack of antiviral responses. We propose that MNV-induced metabolic stress supports the establishment of host tolerance to viral replication and propagation. IMPORTANCE During viral infection, host defenses are typically characterized by the secretion of proinflammatory autocrine and paracrine cytokines, potentiation of the interferon (IFN) response, and induction of the antiviral response via activation of JAK and Stat signaling. To avoid these and propagate, viruses have evolved strategies to evade or counteract host sensing. In this study, we demonstrate that murine norovirus controls the antiviral response by activating a metabolic stress response that activates the amino acid response and impairs inflammatory signaling. This highlights novel tools in the viral countermeasures arsenal and demonstrates the importance of the currently poorly understood metabolic reprogramming occurring during viral infections.
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Affiliation(s)
- Michèle Brocard
- Faculty of Health and Medical Sciences, School of Biosciences and Medicine, University of Surrey, Guildford, United Kingdom
| | - Jia Lu
- Division of Virology, Department of Pathology, Addenbrooke’s Hospital, University of Cambridge, Cambridge, United Kingdom
| | - Belinda Hall
- Faculty of Health and Medical Sciences, School of Biosciences and Medicine, University of Surrey, Guildford, United Kingdom
| | - Khushboo Borah
- Faculty of Health and Medical Sciences, School of Biosciences and Medicine, University of Surrey, Guildford, United Kingdom
| | - Carla Moller-Levet
- Faculty of Health and Medical Sciences, School of Biosciences and Medicine, University of Surrey, Guildford, United Kingdom
| | - Iliana Georgana
- Division of Virology, Department of Pathology, Addenbrooke’s Hospital, University of Cambridge, Cambridge, United Kingdom
| | - Frederic Sorgeloos
- Division of Virology, Department of Pathology, Addenbrooke’s Hospital, University of Cambridge, Cambridge, United Kingdom
| | - Dany J. V. Beste
- Faculty of Health and Medical Sciences, School of Biosciences and Medicine, University of Surrey, Guildford, United Kingdom
| | - Ian G. Goodfellow
- Division of Virology, Department of Pathology, Addenbrooke’s Hospital, University of Cambridge, Cambridge, United Kingdom
| | - Nicolas Locker
- Faculty of Health and Medical Sciences, School of Biosciences and Medicine, University of Surrey, Guildford, United Kingdom
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19
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Endoplasmic reticulum stress: Multiple regulatory roles in hepatocellular carcinoma. Biomed Pharmacother 2021; 142:112005. [PMID: 34426262 DOI: 10.1016/j.biopha.2021.112005] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2021] [Revised: 07/25/2021] [Accepted: 08/01/2021] [Indexed: 12/24/2022] Open
Abstract
BACKGROUND Endoplasmic reticulum (ER) stress is a basic cellular stress response that maintains cellular protein homeostasis under endogenous or exogenous stimuli, which depends on the stimulus, its intensity, and action time. The ER produces a corresponding cascade reaction for crosstalk of adaptive and/or pro-death regulation with other organelles. Hepatocellular carcinoma(HCC) is one of the most common malignant solid tumors with an extremely poor prognosis. Viral hepatitis infection, cirrhosis, and steatohepatitis are closely related to the occurrence and development of HCC, and ER stress has gradually been shown to be a major mechanism. Moreover, an increasing need for protein and lipid products and relative deficiencies of oxygen and nutrients for rapid proliferation and endoplasmic reticulum stress are undoubtedly involved. Therefore, to fully and comprehensively understand the regulatory role of endoplasmic reticulum stress in the occurrence and progression of HCC is of vital importance to explore its pathogenesis and develop novel anti-cancer strategies. METHODOLOGY We searched for relevant publications in the PubMed databases using the keywords "Endoplasmic reticulum stress", "hepatocellular carcinoma" in last five years,and present an overview of the current knowledge that links ER stress and HCC, which includes carcinogenesis, progression, and anti-cancer strategies, and propose directions of future research. RESULT ER stress were confirmed to be multiple regulators or effectors of cancer, which also be confirmed to drive tumorigenesis and progression of HCC. Targeting ER stress signaling pathway and related molecules could play a critical role for anti-HCC and has become a research hotspot for anti-cancer in recent years. CONCLUSION ER stress are critical for the processes of the tumorigenesis and progression of tumors. For HCC, ER stress was associated with tumorigenesis, development, metastasis, angiogenesis and drug resistance, targeting ER stress has emerged as a potential anti-tumor strategy.
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20
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Mutation in FBXO32 causes dilated cardiomyopathy through up-regulation of ER-stress mediated apoptosis. Commun Biol 2021; 4:884. [PMID: 34272480 PMCID: PMC8285540 DOI: 10.1038/s42003-021-02391-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2020] [Accepted: 06/23/2021] [Indexed: 02/06/2023] Open
Abstract
Endoplasmic reticulum (ER) stress induction of cell death is implicated in cardiovascular diseases. Sustained activation of ER-stress induces the unfolded protein response (UPR) pathways, which in turn activate three major effector proteins. We previously reported a missense homozygous mutation in FBXO32 (MAFbx, Atrogin-1) causing advanced heart failure by impairing autophagy. In the present study, we performed transcriptional profiling and biochemical assays, which unexpectedly revealed a reduced activation of UPR effectors in patient mutant hearts, while a strong up-regulation of the CHOP transcription factor and of its target genes are observed. Expression of mutant FBXO32 in cells is sufficient to induce CHOP-associated apoptosis, to increase the ATF2 transcription factor and to impair ATF2 ubiquitination. ATF2 protein interacts with FBXO32 in the human heart and its expression is especially high in FBXO32 mutant hearts. These findings provide a new underlying mechanism for FBXO32-mediated cardiomyopathy, implicating abnormal activation of CHOP. These results suggest alternative non-canonical pathways of CHOP activation that could be considered to develop new therapeutic targets for the treatment of FBXO32-associated DCM. Al-Yacoub et al. investigate the consequences of FBXO32 mutation on dilated cardiomyopathy. ER stress, abnormal CHOP activation and CHOP-induced apoptosis with no UPR effector activation are found to underlie the FBXO32 mutation induced cardiomyopathy, suggesting an alternative pathway that can be considered to develop new therapeutic targets for its treatment.
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21
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Yang M, Luo S, Wang X, Li C, Yang J, Zhu X, Xiao L, Sun L. ER-Phagy: A New Regulator of ER Homeostasis. Front Cell Dev Biol 2021; 9:684526. [PMID: 34307364 PMCID: PMC8299523 DOI: 10.3389/fcell.2021.684526] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2021] [Accepted: 06/04/2021] [Indexed: 12/17/2022] Open
Abstract
The endoplasmic reticulum (ER) is one of the most important cellular organelles and is essential for cell homeostasis. Upon external stimulation, ER stress induces the unfolded protein response (UPR) and ER-associated degradation (ERAD) to maintain ER homeostasis. However, persistent ER stress can lead to cell damage. ER-phagy is a selective form of autophagy that ensures the timely removal of damaged ER, thereby protecting cells from damage caused by excessive ER stress. As ER-phagy is a newly identified form of autophagy, many receptor-mediated ER-phagy pathways have been discovered in recent years. In this review, we summarize our understanding of the maintenance of ER homeostasis and describe the receptors identified to date. Finally, the relationships between ER-phagy and diseases are also discussed.
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Affiliation(s)
- Ming Yang
- Department of Nephrology, The Second Xiangya Hospital, Central South University, Changsha, China.,Hunan Key Laboratory of Kidney Disease and Blood Purification, Changsha, China
| | - Shilu Luo
- Department of Nephrology, The Second Xiangya Hospital, Central South University, Changsha, China.,Hunan Key Laboratory of Kidney Disease and Blood Purification, Changsha, China
| | - Xi Wang
- Department of Nutrition, Xiangya Hospital, Central South University, Changsha, China
| | - Chenrui Li
- Department of Nephrology, The Second Xiangya Hospital, Central South University, Changsha, China
| | - Jinfei Yang
- Department of Nephrology, The Second Xiangya Hospital, Central South University, Changsha, China
| | - Xuejing Zhu
- Department of Nephrology, The Second Xiangya Hospital, Central South University, Changsha, China
| | - Li Xiao
- Department of Nephrology, The Second Xiangya Hospital, Central South University, Changsha, China
| | - Lin Sun
- Department of Nephrology, The Second Xiangya Hospital, Central South University, Changsha, China.,Hunan Key Laboratory of Kidney Disease and Blood Purification, Changsha, China
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22
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Ma JY, Liu Q, Liu G, Peng S, Wu G. Identification and validation of a robust autophagy-related molecular model for predicting the prognosis of breast cancer patients. Aging (Albany NY) 2021; 13:16684-16695. [PMID: 34185683 PMCID: PMC8266368 DOI: 10.18632/aging.203187] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2021] [Accepted: 06/04/2021] [Indexed: 12/11/2022]
Abstract
Despite a relatively low mortality rate, high recurrence rates represent a significant problem for breast cancer (BC) patients. Autophagy affects the development, progression, and prognosis of various cancers, including BC. The aim of the present study was to identify candidate autophagy-related genes (ARGs) and construct a molecular-clinicopathological signature to predict recurrence risk in BC. A 10-ARG-based signature was established in a training cohort (GEO-BC dataset GSE25066) with LASSO Cox regression and assessed in an independent validation cohort (GEO-BC GSE22219). Significant differences in recurrence-free survival were observed for high- and low-risk patients segregated based on their signature-based risk score. Time-dependent receiver operating characteristic (tdROC) analysis of signature performance demonstrated satisfactory accuracy and predictive power in both the training and validation cohorts. Moreover, we developed a nomogram to predict 3- and 5-year recurrence-free survival by combining the autophagy-related risk score and clinicopathological data. Both the tdROC and calibration curves indicated high discriminating ability for the nomogram. This study indicates that our ARG-based signature is an independent prognostic classifier for recurrence-free survival in BC. In addition, individualized survival risk assessment and treatment decisions might be effectively improved by implementing the proposed nomogram.
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Affiliation(s)
- Jian-Ying Ma
- Department of Thyroid and Breast Surgery, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Qin Liu
- Department of Breast Surgery, Thyroid Surgery, Huangshi Central Hospital of Edong Healthcare Group, Hubei Polytechnic University, Huangshi, Hubei, China
| | - Gang Liu
- Department of Breast Surgery, Thyroid Surgery, Huangshi Central Hospital of Edong Healthcare Group, Hubei Polytechnic University, Huangshi, Hubei, China
| | - Shasha Peng
- Department of Hepatobiliary Surgery, Huangshi Central Hospital of Edong Healthcare Group, Hubei Polytechnic University, Huangshi, Hubei, China
| | - Gaosong Wu
- Department of Thyroid and Breast Surgery, Zhongnan Hospital of Wuhan University, Wuhan, China
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23
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Detection of Unfolded Protein Response by Polymerase Chain Reaction. Methods Mol Biol 2021. [PMID: 34033090 DOI: 10.1007/978-1-0716-1162-3_2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
Abstract
The unfolded protein response is a cellular adaptive mechanism localized in the endoplasmic reticulum. It involves three phases: the detection of increased presence of unfolded proteins as a result of cellular stressors; the execution of an adaptive cascade of events aimed at the enhancement of proper protein folding and degradation of improperly folded proteins; and finally, when stress is not alleviated, the execution of programmed cell death. The main effectors of the UPR are transcription factors involved in the upregulation of either chaperone proteins or proapoptotic proteins. Two of these transcription factors are CHOP and the spliced variant of XBP-1 (XBP1s). In this chapter, we describe a quantitative PCR method to detect the upregulation of CHOP and XBP1s mRNA during Tunicamycin-induced UPR.
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Al Madhoun A, Haddad D, Al Tarrah M, Jacob S, Al-Ali W, Nizam R, Miranda L, Al-Rashed F, Sindhu S, Ahmad R, Bitar MS, Al-Mulla F. Microarray analysis reveals ONC201 mediated differential mechanisms of CHOP gene regulation in metastatic and nonmetastatic colorectal cancer cells. Sci Rep 2021; 11:11893. [PMID: 34088951 PMCID: PMC8178367 DOI: 10.1038/s41598-021-91092-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2020] [Accepted: 05/20/2021] [Indexed: 01/03/2023] Open
Abstract
The imipramine ONC201 has antiproliferative effects in several cancer cell types and activates integrated stress response pathway associated with the induction of Damage Inducible Transcript 3 (DDIT3, also known as C/EBP homologous protein or CHOP). We investigated the signaling pathways through which ONC201/CHOP crosstalk is regulated in ONC201-treated nonmetastatic and metastatic cancer cell lines (Dukes' type B colorectal adenocarcinoma nonmetastatic SW480 and metastatic LS-174T cells, respectively). Cell proliferation and apoptosis were evaluated by MTT assays and flow cytometry, gene expression was assessed by Affymetrix microarray, signaling pathway perturbations were assessed in silico, and key regulatory proteins were validated by Western blotting. Unlike LS-174T cells, SW480 cells were resistant to ONC201 treatment; Gene Ontology analysis of differentially expressed genes showed that cellular responsiveness to ONC201 treatment also differed substantially. In both ONC201-treated cell lines, CHOP expression was upregulated; however, its upstream regulatory mechanisms were perturbed. Although, PERK, ATF6 and IRE1 ER-stress pathways upregulated CHOP in both cell types, the Bak/Bax pathway regulated CHOP only LS-174T cells. Additionally, CHOP RNA splicing profiles varied between cell lines; these were further modified by ONC201 treatment. In conclusion, we delineated the signaling mechanisms by which CHOP expression is regulated in ONC201-treated non-metastatic and metastatic colorectal cell lines. The observed differences could be related to cellular plasticity and metabolic reprogramming, nevertheless, detailed mechanistic studies are required for further validations.
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Affiliation(s)
- Ashraf Al Madhoun
- Department of Genetics and Bioinformatics, Dasman Diabetes Institute, 15462, Dasman, Kuwait. .,Department of Animal and Imaging Core Facilities, Dasman Diabetes Institute, 15462, Dasman, Kuwait.
| | - Dania Haddad
- Department of Genetics and Bioinformatics, Dasman Diabetes Institute, 15462, Dasman, Kuwait
| | - Mustafa Al Tarrah
- Department of Genetics and Bioinformatics, Dasman Diabetes Institute, 15462, Dasman, Kuwait
| | - Sindhu Jacob
- Department of Genetics and Bioinformatics, Dasman Diabetes Institute, 15462, Dasman, Kuwait
| | - Waleed Al-Ali
- Department of Pharmacology and Toxicology, Faculty of Medicine, Kuwait University, 046302, Jabriya, Kuwait
| | - Rasheeba Nizam
- Department of Genetics and Bioinformatics, Dasman Diabetes Institute, 15462, Dasman, Kuwait
| | - Lavina Miranda
- Department of Animal and Imaging Core Facilities, Dasman Diabetes Institute, 15462, Dasman, Kuwait
| | - Fatema Al-Rashed
- Department of Immunology and Microbiology, Dasman Diabetes Institute, 15462, Dasman, Kuwait
| | - Sardar Sindhu
- Department of Animal and Imaging Core Facilities, Dasman Diabetes Institute, 15462, Dasman, Kuwait.,Department of Immunology and Microbiology, Dasman Diabetes Institute, 15462, Dasman, Kuwait
| | - Rasheed Ahmad
- Department of Immunology and Microbiology, Dasman Diabetes Institute, 15462, Dasman, Kuwait
| | - Milad S Bitar
- Department of Pharmacology and Toxicology, Faculty of Medicine, Kuwait University, 046302, Jabriya, Kuwait
| | - Fahd Al-Mulla
- Department of Genetics and Bioinformatics, Dasman Diabetes Institute, 15462, Dasman, Kuwait.
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Li M, Thorne RF, Shi R, Zhang XD, Li J, Li J, Zhang Q, Wu M, Liu L. DDIT3 Directs a Dual Mechanism to Balance Glycolysis and Oxidative Phosphorylation during Glutamine Deprivation. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2021; 8:e2003732. [PMID: 34105294 PMCID: PMC8188220 DOI: 10.1002/advs.202003732] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Revised: 01/29/2021] [Indexed: 05/26/2023]
Abstract
Extracellular glutamine represents an important energy source for many cancer cells and its metabolism is intimately involved in maintaining redox homeostasis. The heightened metabolic activity within tumor tissues can result in glutamine deficiency, necessitating metabolic reprogramming responses. Here, dual mechanisms involving the stress-responsive transcription factor DDIT3 (DNA damage induced transcript 3) that establishes an interrelationship between glycolysis and mitochondrial respiration are revealed. DDIT3 is induced during glutamine deprivation to promote glycolysis and adenosine triphosphate production via suppression of the negative glycolytic regulator TIGAR. In concert, a proportion of the DDIT3 pool translocates to the mitochondria and suppresses oxidative phosphorylation through LONP1-mediated down-regulation of COQ9 and COX4. This in turn dampens the sustained levels of reactive oxygen species that follow glutamine withdrawal. Together these mechanisms constitute an adaptive survival mechanism permitting tumor cells to survive metabolic stress induced by glutamine starvation.
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Affiliation(s)
- Mingyue Li
- Heifei National Laboratory for Physical Sciences at the Microscale of USTCCAS Centre for Excellence in Molecular Cell Sciencethe First Affiliated Hospital of University of Science and Technology of ChinaHefeiAnhui230027China
| | - Rick Francis Thorne
- Translational Research InstituteHenan Provincial People's HospitalSchool of Clinical MedicineHenan UniversityZhengzhouHenan450003China
| | - Ronghua Shi
- Heifei National Laboratory for Physical Sciences at the Microscale of USTCCAS Centre for Excellence in Molecular Cell Sciencethe First Affiliated Hospital of University of Science and Technology of ChinaHefeiAnhui230027China
| | - Xu Dong Zhang
- Translational Research InstituteHenan Provincial People's HospitalSchool of Clinical MedicineHenan UniversityZhengzhouHenan450003China
| | - Jingmin Li
- Translational Research InstituteHenan Provincial People's HospitalSchool of Clinical MedicineHenan UniversityZhengzhouHenan450003China
- Harbin Medical University Cancer HospitalHarbinHeilongjiang150081China
| | - Jingtong Li
- Harbin Medical University Cancer HospitalHarbinHeilongjiang150081China
| | - Qingyuan Zhang
- Harbin Medical University Cancer HospitalHarbinHeilongjiang150081China
| | - Mian Wu
- Heifei National Laboratory for Physical Sciences at the Microscale of USTCCAS Centre for Excellence in Molecular Cell Sciencethe First Affiliated Hospital of University of Science and Technology of ChinaHefeiAnhui230027China
- Translational Research InstituteHenan Provincial People's HospitalSchool of Clinical MedicineHenan UniversityZhengzhouHenan450003China
| | - Lianxin Liu
- Heifei National Laboratory for Physical Sciences at the Microscale of USTCCAS Centre for Excellence in Molecular Cell Sciencethe First Affiliated Hospital of University of Science and Technology of ChinaHefeiAnhui230027China
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26
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Sorge S, Theelke J, Yildirim K, Hertenstein H, McMullen E, Müller S, Altbürger C, Schirmeier S, Lohmann I. ATF4-Induced Warburg Metabolism Drives Over-Proliferation in Drosophila. Cell Rep 2021; 31:107659. [PMID: 32433968 DOI: 10.1016/j.celrep.2020.107659] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2019] [Revised: 01/30/2020] [Accepted: 04/28/2020] [Indexed: 12/12/2022] Open
Abstract
The mitochondrial electron transport chain (ETC) enables essential metabolic reactions; nonetheless, the cellular responses to defects in mitochondria and the modulation of signaling pathway outputs are not understood. We show that Notch signaling and ETC attenuation via knockdown of COX7a induces massive over-proliferation. The tumor-like growth is caused by a transcriptional response through the eIF2α-kinase PERK and ATF4, which activates the expression of metabolic enzymes, nutrient transporters, and mitochondrial chaperones. We find this stress adaptation to be beneficial for progenitor cell fitness, as it renders cells sensitive to proliferation induced by the Notch signaling pathway. Intriguingly, over-proliferation is not caused by transcriptional cooperation of Notch and ATF4, but it is mediated in part by pH changes resulting from the Warburg metabolism induced by ETC attenuation. Our results suggest that ETC function is monitored by the PERK-ATF4 pathway, which can be hijacked by growth-promoting signaling pathways, leading to oncogenic pathway activity.
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Affiliation(s)
- Sebastian Sorge
- Centre for Organismal Studies (COS) Heidelberg, Heidelberg University, 69120 Heidelberg, Germany
| | - Jonas Theelke
- Centre for Organismal Studies (COS) Heidelberg, Heidelberg University, 69120 Heidelberg, Germany
| | - Kerem Yildirim
- Centre for Organismal Studies (COS) Heidelberg, Heidelberg University, 69120 Heidelberg, Germany
| | - Helen Hertenstein
- Institute of Neuro- and Behavioral Biology, University of Münster, 48149 Münster, Germany
| | - Ellen McMullen
- Institute of Neuro- and Behavioral Biology, University of Münster, 48149 Münster, Germany
| | - Stephan Müller
- Institute of Neuro- and Behavioral Biology, University of Münster, 48149 Münster, Germany
| | | | - Stefanie Schirmeier
- Institute of Neuro- and Behavioral Biology, University of Münster, 48149 Münster, Germany
| | - Ingrid Lohmann
- Centre for Organismal Studies (COS) Heidelberg, Heidelberg University, 69120 Heidelberg, Germany.
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27
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Menendez-Montes I, Escobar B, Gomez MJ, Albendea-Gomez T, Palacios B, Bonzon-Kulichenko E, Izquierdo-Garcia JL, Alonso AV, Ferrarini A, Jimenez-Borreguero LJ, Ruiz-Cabello J, Vázquez J, Martin-Puig S. Activation of amino acid metabolic program in cardiac HIF1-alpha-deficient mice. iScience 2021; 24:102124. [PMID: 33665549 PMCID: PMC7900219 DOI: 10.1016/j.isci.2021.102124] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Revised: 12/01/2020] [Accepted: 01/26/2021] [Indexed: 12/30/2022] Open
Abstract
HIF1-alpha expression defines metabolic compartments in the developing heart, promoting glycolytic program in the compact myocardium and mitochondrial enrichment in the trabeculae. Nonetheless, its role in cardiogenesis is debated. To assess the importance of HIF1-alpha during heart development and the influence of glycolysis in ventricular chamber formation, herein we generated conditional knockout models of Hif1a in Nkx2.5 cardiac progenitors and cardiomyocytes. Deletion of Hif1a impairs embryonic glycolysis without influencing cardiomyocyte proliferation and results in increased mitochondrial number and transient activation of amino acid catabolism together with HIF2α and ATF4 upregulation by E12.5. Hif1a mutants display normal fatty acid oxidation program and do not show cardiac dysfunction in the adulthood. Our results demonstrate that cardiac HIF1 signaling and glycolysis are dispensable for mouse heart development and reveal the metabolic flexibility of the embryonic myocardium to consume amino acids, raising the potential use of alternative metabolic substrates as therapeutic interventions during ischemic events. Loss of cardiac Hif1a does not preclude heart development or cardiac function Embryonic Hif1a-deficient hearts transiently upregulate amino acid catabolism Amino acid catabolism activation sustains heart growth in the absence of glycolysis HIF2α and ATF4 are transiently upregulated in the developing heart upon Hif1a loss
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Affiliation(s)
- Ivan Menendez-Montes
- Myocardial Pathophysiology Area. National Center for Cardiovascular Research, Melchor Fernandez Almagro 3, 28029 Madrid, Spain.,Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Beatriz Escobar
- Myocardial Pathophysiology Area. National Center for Cardiovascular Research, Melchor Fernandez Almagro 3, 28029 Madrid, Spain
| | - Manuel J Gomez
- Bioinformatics Unit. National Center for Cardiovascular Research. Madrid, Spain
| | - Teresa Albendea-Gomez
- Myocardial Pathophysiology Area. National Center for Cardiovascular Research, Melchor Fernandez Almagro 3, 28029 Madrid, Spain.,Facultad de Medicina. Universidad Francisco de Vitoria, Madrid, Spain
| | - Beatriz Palacios
- Myocardial Pathophysiology Area. National Center for Cardiovascular Research, Melchor Fernandez Almagro 3, 28029 Madrid, Spain
| | | | - Jose Luis Izquierdo-Garcia
- Center for Cooperative Research in Biomaterials (CIC biomaGUNE), Basque Research and Technology Alliance (BRTA), 20014 Donostia San Sebastián, Spain.,CIBER de Enfermedades Respiratorias (CIBERES), 28029 Madrid, Spain.,Departamento de Química en Ciencias Farmaceuticas. Facultad de Farmacia, Universidad Complutense de Madrid, 28040 Madrid, Spain
| | - Ana Vanessa Alonso
- Advanced Imaging Unit. National Center for Cardiovascular Research. Madrid, Spain
| | - Alessia Ferrarini
- Vascular Pathophysiology Area. National Center for Cardiovascular Research. Madrid, Spain
| | - Luis Jesus Jimenez-Borreguero
- Advanced Imaging Unit. National Center for Cardiovascular Research. Madrid, Spain.,Cardiology Unit, Hospital Universitario de La Princesa, Madrid, Spain
| | - Jesus Ruiz-Cabello
- Center for Cooperative Research in Biomaterials (CIC biomaGUNE), Basque Research and Technology Alliance (BRTA), 20014 Donostia San Sebastián, Spain.,CIBER de Enfermedades Respiratorias (CIBERES), 28029 Madrid, Spain.,Departamento de Química en Ciencias Farmaceuticas. Facultad de Farmacia, Universidad Complutense de Madrid, 28040 Madrid, Spain.,IKERBASQUE, Basque Foundation for Science, 48013 Bilbao, Spain
| | - Jesus Vázquez
- Vascular Pathophysiology Area. National Center for Cardiovascular Research. Madrid, Spain.,CIBER de Enfermedades Cardiovasculares (CIBERCV), Madrid, Spain
| | - Silvia Martin-Puig
- Myocardial Pathophysiology Area. National Center for Cardiovascular Research, Melchor Fernandez Almagro 3, 28029 Madrid, Spain.,Facultad de Medicina. Universidad Francisco de Vitoria, Madrid, Spain
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28
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Xu W, Wang C, Hua J. X-box binding protein 1 (XBP1) function in diseases. Cell Biol Int 2020; 45:731-739. [PMID: 33325615 DOI: 10.1002/cbin.11533] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Revised: 11/12/2020] [Accepted: 12/13/2020] [Indexed: 12/15/2022]
Abstract
The accumulation of unfolded or misfolded proteins in the endoplasmic reticulum (ER) causes endoplasmic reticulum stress (ERS), which is characteristic of cells with high levels of secretory activity and is involved in a variety of diseases. In response to ERS, cells initiate an adaptive process named the unfolding protein response (UPR) to maintain intracellular homeostasis and survival. However, long term and unresolved ERS can also induce apoptosis. As the most conserved signaling branch of UPR, the IRE1-XBP1 pathway plays an important role in both physiological and pathological states, and its activity has a profound impact on disease progression and prognosis. Here, the latest research progress of IRE1-XBP1 pathway in cancer, metabolic diseases, and other diseases was briefly introduced, and the relationship between several diseases and this pathway was analyzed. Besides, the new understanding and prospect of IRE1-XBP1 pathway regulating male reproduction were reviewed.
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Affiliation(s)
- Wenjing Xu
- Shaanxi Centre of Stem Cells Engineering & Technology, College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi, China
| | - Congrong Wang
- Translational Medical Center for Stem Cell Therapy, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China
| | - Jinlian Hua
- Shaanxi Centre of Stem Cells Engineering & Technology, College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi, China
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29
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SLC6A14, a Na+/Cl--coupled amino acid transporter, functions as a tumor promoter in colon and is a target for Wnt signaling. Biochem J 2020; 477:1409-1425. [PMID: 32219372 PMCID: PMC7182441 DOI: 10.1042/bcj20200099] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2020] [Revised: 03/25/2020] [Accepted: 03/26/2020] [Indexed: 12/12/2022]
Abstract
SLC6A14 is a Na+/Cl−-coupled transporter for neutral and cationic amino acids. It is expressed at basal levels in the normal colon but is up-regulated in colon cancer. However, the relevance of this up-regulation to cancer progression and the mechanisms involved in the up-regulation remain unknown. Here, we show that SLC6A14 is essential for colon cancer and that its up-regulation involves, at least partly, Wnt signaling. The up-regulation of the transporter is evident in most human colon cancer cell lines and also in a majority of patient-derived xenografts. These findings are supported by publicly available TCGA (The Cancer Genome Atlas) database. Treatment of colon cancer cells with α-methyltryptophan (α-MT), a blocker of SLC6A14, induces amino acid deprivation, decreases mTOR activity, increases autophagy, promotes apoptosis, and suppresses cell proliferation and invasion. In xenograft and syngeneic mouse tumor models, silencing of SLC6A14 by shRNA or blocking its function by α-MT reduces tumor growth. Similarly, the deletion of Slc6a14 in mice protects against colon cancer in two different experimental models (inflammation-associated colon cancer and genetically driven colon cancer). In colon cancer cells, expression of the transporter is reduced by Wnt antagonist or by silencing of β-catenin whereas Wnt agonist or overexpression of β-catenin shows the opposite effect. Finally, SLC6A14 as a target for β-catenin is confirmed by chromatin immunoprecipitation. These studies demonstrate that SLC6A14 plays a critical role in the promotion of colon cancer and that its up-regulation in cancer involves Wnt signaling. These findings identify SLC6A14 as a promising drug target for the treatment of colon cancer.
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Liu Y. Hydrogen peroxide induces nucleus pulposus cell apoptosis by ATF4/CHOP signaling pathway. Exp Ther Med 2020; 20:3244-3252. [PMID: 32855694 PMCID: PMC7444416 DOI: 10.3892/etm.2020.9052] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2020] [Accepted: 06/19/2020] [Indexed: 12/16/2022] Open
Abstract
Oxidative stress induces excessive apoptosis resulting in the reduction of intervertebral disc cells, the consequent reduction of extracellular matrix (ECM) synthesis, and compositional changes, which is the pathological basis for intervertebral disc degeneration (IVDD). The present study explored the activating transcription factor 4 (ATF4)/C/EBP homologous protein (CHOP) signaling pathway in the H2O2-induced nucleus pulposus (NP) cell apoptosis. Human degenerated intervertebral discs were collected from Lumbar disc surgery. NP cells isolated from the tissues were cultured with H2O2 to induce apoptosis in vitro. Malondialdehyde (MDA) analysis was performed to determine the reactive oxygen species (ROS) of the tissue. Western blot analysis and reverse transcription-polymerase chain reaction (RT-PCR) were performed to analyze collagen II, ATF4, CHOP, and caspase-9 gene expression. Flow cytometry was used to determine the apoptotic ratio of NP cells. siRNA was also used to silence ATF4 and CHOP gene expression. NP tissues in higher degenerated degree underwent much more MDA, expressed less collagen II, more ATF4, CHOP, and caspase-9 compared with the mildly degenerated tissues. H2O2 induced NP cell apoptosis by upregulating expression of ATF4, CHOP and caspase-9. The silencing of ATF4 or CHOP alleviated NP cell apoptosis by suppressing caspase-9 expression. Inhibiting caspase-9 did not affect ATF4 and CHOP expression but protected NP cells from apoptosis. In this study, we found H2O2 could promote NP cell apoptosis by activating the ATF4/CHOP signaling pathway resulting in the upregulation of caspase-9. Interdict of ATF4, CHOP, or caspase-9 contributed to the reduction of apoptosis caused by H2O2.
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Affiliation(s)
- Yi Liu
- Department of Orthopedics, The First People's Hospital of Fuyang District, Hangzhou, Zhejiang 311400, P.R. China
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31
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Fang T, Huang S, Chen Y, Chen Z, Chen J, Hu W. Glucagon Like Peptide-1 Receptor Agonists Alters Pancreatic and Hepatic Histology and Regulation of Endoplasmic Reticulum Stress in High-fat Diet Mouse Model. Exp Clin Endocrinol Diabetes 2020; 129:625-633. [PMID: 32961563 DOI: 10.1055/a-1240-4936] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
BACKGROUND Obesity is a major health problem worldwide, and non-alcoholic fatty pancreas disease (NAFPD) and non-alcoholic fatty liver disease (NAFLD) are obesity-associated complications. Liraglutide, a glucagon-like peptide-1 (GLP-1) agonist, has been approved for treatment of obesity. We aimed to evaluate the therapeutic effects of liraglutide on the complications through its regulation of endoplasmic reticulum (ER) stress. METHODS A high-fat diet mouse model was established in C57BL/6J mice. Two groups of mice were fed a high-fat diet with 60% fat for 16 weeks and control mice were fed standard chow. A four-week 0.6 mg/kg/day liraglutide treatment was started in one high-fat diet group after 12 weeks of the high-fat diet. After sacrificing the mice, pancreatic and hepatic tissues were prepared for western blot and immunohistochemistry for ER stress proteins, including activating transcription factor 4 (ATF4), caspase 12, C/EBP homologous protein (CHOP) eukaryotic initiation factor 2 α (eIF2α), glucose regulated protein (GRP) 78 and protein kinase RNA-like endoplasmic reticulum kinase (PERK). RESULTS Liraglutide significantly decreased body weight gained by mice consuming a high-fat diet (27.6 g vs. 34.5 g, P<0.001), and levels of all ER proteins increased significantly in both the pancreas and liver (all P<0.05). Expression of most ER stress proteins in pancreatic tissue correlated with disease scores of NAFLD (all P<0.05). However, no significant differences were found in pancreatic ATF 4 expression between mice without NAFLD, and those with early non-alcoholic steatohepatitis (NASH) and fibrotic NASH (P=0.122). CONCLUSION Liraglutide reduces the severity of NAFPD and NAFLD may through regulating the ER stress pathway and downstream apoptosis signaling.
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Affiliation(s)
- Taiyong Fang
- Department of Gastroenterology, The Second Affiliated Hospital of Fujian Medical University, Quanzhou, Fujian Province, China
| | - Siying Huang
- Department of Gastroenterology, The Second Affiliated Hospital of Fujian Medical University, Quanzhou, Fujian Province, China
| | - Yongpeng Chen
- Department of Gastroenterology, The Second Affiliated Hospital of Fujian Medical University, Quanzhou, Fujian Province, China
| | - Zongchi Chen
- Department of Gastroenterology, The Second Affiliated Hospital of Fujian Medical University, Quanzhou, Fujian Province, China
| | - Jiangmu Chen
- Department of Gastroenterology, The Second Affiliated Hospital of Fujian Medical University, Quanzhou, Fujian Province, China
| | - Weitao Hu
- Department of Gastroenterology, The Second Affiliated Hospital of Fujian Medical University, Quanzhou, Fujian Province, China
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32
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Bjedov I, Rallis C. The Target of Rapamycin Signalling Pathway in Ageing and Lifespan Regulation. Genes (Basel) 2020; 11:E1043. [PMID: 32899412 PMCID: PMC7565554 DOI: 10.3390/genes11091043] [Citation(s) in RCA: 48] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Revised: 08/28/2020] [Accepted: 08/30/2020] [Indexed: 12/11/2022] Open
Abstract
Ageing is a complex trait controlled by genes and the environment. The highly conserved mechanistic target of rapamycin signalling pathway (mTOR) is a major regulator of lifespan in all eukaryotes and is thought to be mediating some of the effects of dietary restriction. mTOR is a rheostat of energy sensing diverse inputs such as amino acids, oxygen, hormones, and stress and regulates lifespan by tuning cellular functions such as gene expression, ribosome biogenesis, proteostasis, and mitochondrial metabolism. Deregulation of the mTOR signalling pathway is implicated in multiple age-related diseases such as cancer, neurodegeneration, and auto-immunity. In this review, we briefly summarise some of the workings of mTOR in lifespan and ageing through the processes of transcription, translation, autophagy, and metabolism. A good understanding of the pathway's outputs and connectivity is paramount towards our ability for genetic and pharmacological interventions for healthy ageing and amelioration of age-related disease.
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Affiliation(s)
- Ivana Bjedov
- UCL Cancer Institute, Paul O’Gorman Building, 72 Huntley Street, London WC1E 6DD, UK
| | - Charalampos Rallis
- School of Life Sciences, University of Essex, Wivenhoe Park, Colchester CO4 3SQ, UK
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33
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Harnessing the Proteostasis Network in Alcohol-associated Liver Disease. CURRENT PATHOBIOLOGY REPORTS 2020. [DOI: 10.1007/s40139-020-00211-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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34
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Ceder MM, Lekholm E, Klaesson A, Tripathi R, Schweizer N, Weldai L, Patil S, Fredriksson R. Glucose Availability Alters Gene and Protein Expression of Several Newly Classified and Putative Solute Carriers in Mice Cortex Cell Culture and D. melanogaster. Front Cell Dev Biol 2020; 8:579. [PMID: 32733888 PMCID: PMC7358622 DOI: 10.3389/fcell.2020.00579] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2020] [Accepted: 06/15/2020] [Indexed: 12/16/2022] Open
Abstract
Many newly identified solute carriers (SLCs) and putative transporters have the possibility to be intricately involved in glucose metabolism. Here we show that many transporters of this type display a high degree of regulation at both mRNA and protein level following no or low glucose availability in mouse cortex cultures. We show that this is also the case in Drosophila melanogaster subjected to starvation or diets with different sugar content. Interestingly, re-introduction of glucose to media, or refeeding flies, normalized the gene expression of a number of the targets, indicating a fast and highly dynamic control. Our findings demonstrate high conservation of these transporters and how dependent both cell cultures and organisms are on gene and protein regulation during metabolic fluctuations. Several transporter genes were regulated simultaneously maybe to initiate alternative metabolic pathways as a response to low glucose levels, both in the cell cultures and in D. melanogaster. Our results display that newly identified SLCs of Major Facilitator Superfamily type, as well as the putative transporters included in our study, are regulated by glucose availability and could be involved in several cellular aspects dependent of glucose and/or its metabolites. Recently, a correlation between dysregulation of glucose in the central nervous system and numerous diseases such as obesity, type 2 diabetes mellitus as well as neurological disease such as Alzheimer’s and Parkinson’s diseases indicate a complex regulation and fine tuning of glucose levels in the brain. The fact that almost one third of transporters and transporter-related proteins remain orphans with unknown or contradictive substrate profile, location and function, pinpoint the need for further research about them to fully understand their mechanistic role and their impact on cellular metabolism.
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Affiliation(s)
- Mikaela M Ceder
- Molecular Neuropharmacology, Department of Pharmaceutical Biosciences, Uppsala University, Uppsala, Sweden
| | - Emilia Lekholm
- Molecular Neuropharmacology, Department of Pharmaceutical Biosciences, Uppsala University, Uppsala, Sweden
| | - Axel Klaesson
- Pharmaceutical Cell Biology, Department of Pharmaceutical Biosciences, Uppsala University, Uppsala, Sweden
| | - Rekha Tripathi
- Molecular Neuropharmacology, Department of Pharmaceutical Biosciences, Uppsala University, Uppsala, Sweden
| | - Nadine Schweizer
- Molecular Neuropharmacology, Department of Pharmaceutical Biosciences, Uppsala University, Uppsala, Sweden
| | - Lydia Weldai
- Molecular Neuropharmacology, Department of Pharmaceutical Biosciences, Uppsala University, Uppsala, Sweden
| | - Sourabh Patil
- Molecular Neuropharmacology, Department of Pharmaceutical Biosciences, Uppsala University, Uppsala, Sweden
| | - Robert Fredriksson
- Molecular Neuropharmacology, Department of Pharmaceutical Biosciences, Uppsala University, Uppsala, Sweden
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Huebner K, Procházka J, Monteiro AC, Mahadevan V, Schneider-Stock R. The activating transcription factor 2: an influencer of cancer progression. Mutagenesis 2020; 34:375-389. [PMID: 31799611 PMCID: PMC6923166 DOI: 10.1093/mutage/gez041] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2019] [Accepted: 11/18/2019] [Indexed: 12/26/2022] Open
Abstract
In contrast to the continuous increase in survival rates for many cancer entities, colorectal cancer (CRC) and pancreatic cancer are predicted to be ranked among the top 3 cancer-related deaths in the European Union by 2025. Especially, fighting metastasis still constitutes an obstacle to be overcome in CRC and pancreatic cancer. As described by Fearon and Vogelstein, the development of CRC is based on sequential mutations leading to the activation of proto-oncogenes and the inactivation of tumour suppressor genes. In pancreatic cancer, genetic alterations also attribute to tumour development and progression. Recent findings have identified new potentially important transcription factors in CRC, among those the activating transcription factor 2 (ATF2). ATF2 is a basic leucine zipper protein and is involved in physiological and developmental processes, as well as in tumorigenesis. The mutation burden of ATF2 in CRC and pancreatic cancer is rather negligible; however, previous studies in other tumours indicated that ATF2 expression level and subcellular localisation impact tumour progression and patient prognosis. In a tissue- and stimulus-dependent manner, ATF2 is activated by upstream kinases, dimerises and induces target gene expression. Dependent on its dimerisation partner, ATF2 homodimers or heterodimers bind to cAMP-response elements or activator protein 1 consensus motifs. Pioneering work has been performed in melanoma in which the dual role of ATF2 is best understood. Even though there is increasing interest in ATF2 recently, only little is known about its involvement in CRC and pancreatic cancer. In this review, we summarise the current understanding of the underestimated ‘cancer gene chameleon’ ATF2 in apoptosis, epithelial-to-mesenchymal transition and microRNA regulation and highlight its functions in CRC and pancreatic cancer. We further provide a novel ATF2 3D structure with key phosphorylation sites and an updated overview of all so-far available mouse models to study ATF2 in vivo.
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Affiliation(s)
- Kerstin Huebner
- Experimental Tumorpathology, Institute of Pathology, University Hospital Erlangen, Friedrich-Alexander University Erlangen-Nuremberg, Erlangen, Germany
| | - Jan Procházka
- Czech Centre for Phenogenomics, Institute of Molecular Genetics of the ASCR, Prague, Czech Republic
| | - Ana C Monteiro
- Experimental Tumorpathology, Institute of Pathology, University Hospital Erlangen, Friedrich-Alexander University Erlangen-Nuremberg, Erlangen, Germany
| | - Vijayalakshmi Mahadevan
- Institute of Bioinformatics and Applied Biotechnology, Biotech Park, Electronic City Phase I, Bangalore, India
| | - Regine Schneider-Stock
- Experimental Tumorpathology, Institute of Pathology, University Hospital Erlangen, Friedrich-Alexander University Erlangen-Nuremberg, Erlangen, Germany
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Burton TD, Fedele AO, Xie J, Sandeman LY, Proud CG. The gene for the lysosomal protein LAMP3 is a direct target of the transcription factor ATF4. J Biol Chem 2020; 295:7418-7430. [PMID: 32312748 PMCID: PMC7247307 DOI: 10.1074/jbc.ra119.011864] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2019] [Revised: 04/09/2020] [Indexed: 11/06/2022] Open
Abstract
Autophagy and lysosomal activities play a key role in the cell by initiating and carrying out the degradation of misfolded proteins. Transcription factor EB (TFEB) functions as a master controller of lysosomal biogenesis and function during lysosomal stress, controlling most but, importantly, not all lysosomal genes. Here, we sought to better understand the regulation of lysosomal genes whose expression does not appear to be controlled by TFEB. Sixteen of these genes were screened for transactivation in response to diverse cellular insults. mRNA levels for lysosomal-associated membrane protein 3 (LAMP3), a gene that is highly up-regulated in many forms of cancer, including breast and cervical cancers, were significantly increased during the integrated stress response, which occurs in eukaryotic cells in response to accumulation of unfolded and misfolded proteins. Of note, results from siRNA-mediated knockdown of activating transcription factor 4 (ATF4) and overexpression of exogenous ATF4 cDNA indicated that ATF4 up-regulates LAMP3 mRNA levels. Finally, ChIP assays verified an ATF4-binding site in the LAMP3 gene promoter, and a dual-luciferase assay confirmed that this ATF4-binding site is indeed required for transcriptional up-regulation of LAMP3 These results reveal that ATF4 directly regulates LAMP3, representing the first identification of a gene for a lysosomal component whose expression is directly controlled by ATF4. This finding may provide a key link between stresses such as accumulation of unfolded proteins and modulation of autophagy, which removes them.
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Affiliation(s)
- Thomas D Burton
- Hopwood Centre for Neurobiology, Lifelong Health Theme, South Australian Health and Medical Research Institute (SAHMRI), P. O. Box 11060, Adelaide, South Australia 5001, Australia
| | - Anthony O Fedele
- Hopwood Centre for Neurobiology, Lifelong Health Theme, South Australian Health and Medical Research Institute (SAHMRI), P. O. Box 11060, Adelaide, South Australia 5001, Australia
| | - Jianling Xie
- Cell Signalling & Gene Regulation, Lifelong Health Theme, South Australian Health and Medical Research Institute (SAHMRI), P. O. Box 11060, Adelaide, South Australia 5001, Australia
| | - Lauren Y Sandeman
- Cell Signalling & Gene Regulation, Lifelong Health Theme, South Australian Health and Medical Research Institute (SAHMRI), P. O. Box 11060, Adelaide, South Australia 5001, Australia
| | - Christopher G Proud
- Hopwood Centre for Neurobiology, Lifelong Health Theme, South Australian Health and Medical Research Institute (SAHMRI), P. O. Box 11060, Adelaide, South Australia 5001, Australia; Department of Molecular and Biomedical Science, School of Biological Sciences, University of Adelaide, Adelaide, South Australia 5005, Australia.
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Panieri E, Telkoparan-Akillilar P, Suzen S, Saso L. The NRF2/KEAP1 Axis in the Regulation of Tumor Metabolism: Mechanisms and Therapeutic Perspectives. Biomolecules 2020; 10:biom10050791. [PMID: 32443774 PMCID: PMC7277620 DOI: 10.3390/biom10050791] [Citation(s) in RCA: 54] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2020] [Revised: 05/17/2020] [Accepted: 05/19/2020] [Indexed: 02/07/2023] Open
Abstract
The NRF2/KEAP1 pathway is a fundamental signaling cascade that controls multiple cytoprotective responses through the induction of a complex transcriptional program that ultimately renders cancer cells resistant to oxidative, metabolic and therapeutic stress. Interestingly, accumulating evidence in recent years has indicated that metabolic reprogramming is closely interrelated with the regulation of redox homeostasis, suggesting that the disruption of NRF2 signaling might represent a valid therapeutic strategy against a variety of solid and hematologic cancers. These aspects will be the focus of the present review.
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Affiliation(s)
- Emiliano Panieri
- Department of Physiology and Pharmacology “Vittorio Erspamer”, Sapienza University of Rome, 00185 Rome, Italy
- Correspondence: (E.P.); (L.S.); Tel.: +39-06-4991-2481 (E.P. & L.S.)
| | - Pelin Telkoparan-Akillilar
- Department of Medical Biology, Faculty of Medicine, Yuksek Ihtisas University, 06520 Balgat, Ankara, Turkey;
| | - Sibel Suzen
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Ankara University, 06100 Tandogan, Ankara, Turkey;
| | - Luciano Saso
- Department of Physiology and Pharmacology “Vittorio Erspamer”, Sapienza University of Rome, 00185 Rome, Italy
- Correspondence: (E.P.); (L.S.); Tel.: +39-06-4991-2481 (E.P. & L.S.)
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Zhang T, Li N, Sun C, Jin Y, Sheng X. MYC and the unfolded protein response in cancer: synthetic lethal partners in crime? EMBO Mol Med 2020; 12:e11845. [PMID: 32310340 PMCID: PMC7207169 DOI: 10.15252/emmm.201911845] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2019] [Revised: 03/07/2020] [Accepted: 03/10/2020] [Indexed: 12/15/2022] Open
Abstract
The transcription factors of the MYC family play pivotal roles in the initiation and progression of human cancers. High oncogenic level of MYC invades low‐affinity sites and enhancer sequences, which subsequently alters the transcriptome, causes metabolic imbalance, and induces stress response. The endoplasmic reticulum (ER) not only plays a central role in maintaining proteostasis, but also contributes to other key biological processes, including Ca2+ metabolism and the synthesis of lipids and glucose. Stress conditions, such as shortage in glucose or oxygen and disruption of Ca2+ homeostasis, may perturb proteostasis and induce the unfolded protein response (UPR), which either restores homeostasis or triggers cell death. Crucial roles of ER stress and UPR signaling have been implicated in various cancers, from oncogenesis to treatment response. Here, we summarize the current knowledge on the interaction between MYC and UPR signaling, and its contribution to cancer development. We also discuss the potential of targeting key UPR signaling nodes as novel synthetic lethal strategies in MYC‐driven cancers.
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Affiliation(s)
- Tingting Zhang
- Ministry of Education Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Ningning Li
- The Seventh Affiliated Hospital of Sun Yat-sen University, Shenzhen, China
| | - Chaoyang Sun
- Department of Obstetrics and Gynecology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yang Jin
- Institute for Cancer Genetics and Informatics, Oslo University Hospital, Oslo, Norway
| | - Xia Sheng
- Ministry of Education Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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Tanaka KI, Shimoda M, Kasai M, Ikeda M, Ishima Y, Kawahara M. Involvement of SAPK/JNK Signaling Pathway in Copper Enhanced Zinc-Induced Neuronal Cell Death. Toxicol Sci 2020; 169:293-302. [PMID: 30768131 DOI: 10.1093/toxsci/kfz043] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Zinc (Zn) plays an important role in many organisms in various physiological functions such as cell division, immune mechanisms and protein synthesis. However, excessive Zn release is induced in pathological situations and causes neuronal cell death. Previously, we reported that Cu ions (Cu2+) markedly exacerbates Zn2+-induced neuronal cell death by potentiating oxidative stress and the endoplasmic reticulum stress response. In contrast, the stress-activated protein kinase/c-Jun amino-terminal kinase (SAPK/JNK) signaling pathway is important in neuronal cell death. Thus, in this study, we focused on the SAPK/JNK signaling pathway and examined its involvement in Cu2+/Zn2+-induced neurotoxicity. Initially, we examined expression of factors involved in the SAPK/JNK signaling pathway. Accordingly, we found that phosphorylated (ie, active) forms of SAPK/JNK (p46 and p54) are increased by CuCl2 and ZnCl2 co-treatment in hypothalamic neuronal mouse cells (GT1-7 cells). Downstream factors of SAPK/JNK, phospho-c-Jun, and phospho-activating transcription factor 2 are also induced by CuCl2 and ZnCl2 co-treatment. Moreover, an inhibitor of the SAPK/JNK signaling pathway, SP600125, significantly suppressed neuronal cell death and activation of the SAPK/JNK signaling pathway induced by CuCl2 and ZnCl2 cotreatment. Finally, we examined involvement of oxidative stress in activation of the SAPK/JNK signaling pathway, and found that human serum albumin-thioredoxin fusion protein, an antioxidative protein, suppresses activation of the SAPK/JNK signaling pathway. On the basis of these results, our findings suggest that activation of ZnCl2-dependent SAPK/JNK signaling pathway is important in neuronal cell death, and CuCl2-induced oxidative stress triggers the activation of this pathway.
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Affiliation(s)
- Ken-Ichiro Tanaka
- Department of Bio-Analytical Chemistry, Faculty of Pharmacy, Musashino University, Nishitokyo-shi, Tokyo, Japan
| | - Mikako Shimoda
- Department of Bio-Analytical Chemistry, Faculty of Pharmacy, Musashino University, Nishitokyo-shi, Tokyo, Japan
| | - Misato Kasai
- Department of Bio-Analytical Chemistry, Faculty of Pharmacy, Musashino University, Nishitokyo-shi, Tokyo, Japan
| | - Mayumi Ikeda
- Department of Pharmacokinetics and Biopharmaceutics, Institute of Biomedical Sciences, Tokushima University, Tokushima, Japan
| | - Yu Ishima
- Department of Pharmacokinetics and Biopharmaceutics, Institute of Biomedical Sciences, Tokushima University, Tokushima, Japan
| | - Masahiro Kawahara
- Department of Bio-Analytical Chemistry, Faculty of Pharmacy, Musashino University, Nishitokyo-shi, Tokyo, Japan
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Potential Applications of NRF2 Modulators in Cancer Therapy. Antioxidants (Basel) 2020; 9:antiox9030193. [PMID: 32106613 PMCID: PMC7139512 DOI: 10.3390/antiox9030193] [Citation(s) in RCA: 88] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2020] [Revised: 02/21/2020] [Accepted: 02/21/2020] [Indexed: 01/17/2023] Open
Abstract
The nuclear factor erythroid 2-related factor 2 (NRF2)-Kelch-like ECH-associated protein 1 (KEAP1) regulatory pathway plays an essential role in protecting cells and tissues from oxidative, electrophilic, and xenobiotic stress. By controlling the transactivation of over 500 cytoprotective genes, the NRF2 transcription factor has been implicated in the physiopathology of several human diseases, including cancer. In this respect, accumulating evidence indicates that NRF2 can act as a double-edged sword, being able to mediate tumor suppressive or pro-oncogenic functions, depending on the specific biological context of its activation. Thus, a better understanding of the mechanisms that control NRF2 functions and the most appropriate context of its activation is a prerequisite for the development of effective therapeutic strategies based on NRF2 modulation. In line of principle, the controlled activation of NRF2 might reduce the risk of cancer initiation and development in normal cells by scavenging reactive-oxygen species (ROS) and by preventing genomic instability through decreased DNA damage. In contrast however, already transformed cells with constitutive or prolonged activation of NRF2 signaling might represent a major clinical hurdle and exhibit an aggressive phenotype characterized by therapy resistance and unfavorable prognosis, requiring the use of NRF2 inhibitors. In this review, we will focus on the dual roles of the NRF2-KEAP1 pathway in cancer promotion and inhibition, describing the mechanisms of its activation and potential therapeutic strategies based on the use of context-specific modulation of NRF2.
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Lebeaupin C, Yong J, Kaufman RJ. The Impact of the ER Unfolded Protein Response on Cancer Initiation and Progression: Therapeutic Implications. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2020; 1243:113-131. [PMID: 32297215 PMCID: PMC7243802 DOI: 10.1007/978-3-030-40204-4_8] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Cellular stress induced by the accumulation of misfolded proteins in the endoplasmic reticulum (ER) activates an elaborate signalling network termed the unfolded protein response (UPR). This adaptive response is mediated by the transmembrane signal transducers IRE1, PERK, and ATF6 to decide cell fate of recovery or death. In malignant cells, UPR signalling may be required to maintain ER homeostasis and survival in the tumor microenvironment characterized by oxidative stress, hypoxia, lactic acidosis and compromised protein folding. Here we provide an overview of the ER response to cellular stress and how the sustained activation of this network enables malignant cells to develop tumorigenic, metastatic and drug-resistant capacities to thrive under adverse conditions. Understanding the complexity of ER stress responses and how to target the UPR in disease will have significant potential for novel future therapeutics.
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Affiliation(s)
- Cynthia Lebeaupin
- Degenerative Diseases Program, SBP Medical Discovery Institute, La Jolla, CA, USA
- Department of Medicine, University of California San Diego, La Jolla, CA, USA
| | - Jing Yong
- Degenerative Diseases Program, SBP Medical Discovery Institute, La Jolla, CA, USA
| | - Randal J Kaufman
- Degenerative Diseases Program, SBP Medical Discovery Institute, La Jolla, CA, USA.
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Zhang MM, Ma YH, Li P, Jia Y, Han KL. Detection of atherosclerosis-related hypochlorous acid produced in foam cells with a localized endoplasmic reticulum probe. Chem Commun (Camb) 2020; 56:2610-2613. [DOI: 10.1039/d0cc00090f] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We have synthesized a turn-on fluorescent probe, termed NB4OH, to detect cellular hypochlorite.
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Affiliation(s)
- Meng-meng Zhang
- State Key Laboratory of Molecular Reaction Dynamics
- Dalian Institute of Chemical Physics (DICP)
- Chinese Academy of Sciences (CAS)
- P. R. China
- University of the Chinese Academy of Sciences
| | - Yin-Hua Ma
- State Key Laboratory of Molecular Reaction Dynamics
- Dalian Institute of Chemical Physics (DICP)
- Chinese Academy of Sciences (CAS)
- P. R. China
- University of the Chinese Academy of Sciences
| | - Peng Li
- Shandong University
- P. R. China
| | - Yan Jia
- State Key Laboratory of Molecular Reaction Dynamics
- Dalian Institute of Chemical Physics (DICP)
- Chinese Academy of Sciences (CAS)
- P. R. China
| | - Ke-Li Han
- State Key Laboratory of Molecular Reaction Dynamics
- Dalian Institute of Chemical Physics (DICP)
- Chinese Academy of Sciences (CAS)
- P. R. China
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43
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Ebstein F, Poli Harlowe MC, Studencka-Turski M, Krüger E. Contribution of the Unfolded Protein Response (UPR) to the Pathogenesis of Proteasome-Associated Autoinflammatory Syndromes (PRAAS). Front Immunol 2019; 10:2756. [PMID: 31827472 PMCID: PMC6890838 DOI: 10.3389/fimmu.2019.02756] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2019] [Accepted: 11/11/2019] [Indexed: 12/13/2022] Open
Abstract
Type I interferonopathies cover a phenotypically heterogeneous group of rare genetic diseases including the recently described proteasome-associated autoinflammatory syndromes (PRAAS). By definition, PRAAS are caused by inherited and/or de novo loss-of-function mutations in genes encoding proteasome subunits such as PSMB8, PSMB9, PSMB7, PSMA3, or proteasome assembly factors including POMP and PSMG2, respectively. Disruption of any of these subunits results in perturbed intracellular protein homeostasis including accumulation of ubiquitinated proteins which is accompanied by a type I interferon (IFN) signature. The observation that, similarly to pathogens, proteasome dysfunctions are potent type I IFN inducers is quite unexpected and, up to now, the underlying molecular mechanisms of this process remain largely unknown. One promising candidate for triggering type I IFN under sterile conditions is the unfolded protein response (UPR) which is typically initiated in response to an accumulation of unfolded and/or misfolded proteins in the endoplasmic reticulum (ER) (also referred to as ER stress). The recent observation that the UPR is engaged in subjects carrying POMP mutations strongly suggests its possible implication in the cause-and-effect relationship between proteasome impairment and interferonopathy onset. The purpose of this present review is therefore to discuss the possible role of the UPR in the pathogenesis of PRAAS. We will particularly focus on pathways initiated by the four ER-membrane proteins ATF6, PERK, IRE1-α, and TCF11/Nrf1 which undergo activation under proteasome inhibition. An overview of the current understanding of the mechanisms and potential cross-talk between the UPR and inflammatory signaling casacades is provided to convey a more integrated picture of the pathophysiology of PRAAS and shed light on potential biomarkers and therapeutic targets.
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Affiliation(s)
- Frédéric Ebstein
- Institut für Medizinische Biochemie und Molekularbiologie, Universitätsmedizin Greifswald, Greifswald, Germany
| | - María Cecilia Poli Harlowe
- Facultad de Medicina Clínica Alemana, Universidad del Desarrollo, Santiago, Chile.,Department of Pediatrics, Baylor College of Medicine, Houston, TX, United States
| | - Maja Studencka-Turski
- Institut für Medizinische Biochemie und Molekularbiologie, Universitätsmedizin Greifswald, Greifswald, Germany
| | - Elke Krüger
- Institut für Medizinische Biochemie und Molekularbiologie, Universitätsmedizin Greifswald, Greifswald, Germany
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Piróg KA, Dennis EP, Hartley CL, Jackson RM, Soul J, Schwartz JM, Bateman JF, Boot-Handford RP, Briggs MD. XBP1 signalling is essential for alleviating mutant protein aggregation in ER-stress related skeletal disease. PLoS Genet 2019; 15:e1008215. [PMID: 31260448 PMCID: PMC6625722 DOI: 10.1371/journal.pgen.1008215] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2018] [Revised: 07/12/2019] [Accepted: 05/27/2019] [Indexed: 01/02/2023] Open
Abstract
The unfolded protein response (UPR) is a conserved cellular response to the accumulation of proteinaceous material in endoplasmic reticulum (ER), active both in health and disease to alleviate cellular stress and improve protein folding. Multiple epiphyseal dysplasia (EDM5) is a genetic skeletal condition and a classic example of an intracellular protein aggregation disease, whereby mutant matrilin-3 forms large insoluble aggregates in the ER lumen, resulting in a specific 'disease signature' of increased expression of chaperones and foldases, and alternative splicing of the UPR effector XBP1. Matrilin-3 is expressed exclusively by chondrocytes thereby making EDM5 a perfect model system to study the role of protein aggregation in disease. In order to dissect the role of XBP1 signalling in aggregation-related conditions we crossed a p.V194D Matn3 knock-in mouse model of EDM5 with a mouse line carrying a cartilage specific deletion of XBP1 and analysed the resulting phenotype. Interestingly, the growth of mice carrying the Matn3 p.V194D mutation compounded with the cartilage specific deletion of XBP1 was severely retarded. Further phenotyping revealed increased intracellular retention of amyloid-like aggregates of mutant matrilin-3 coupled with dramatically decreased cell proliferation and increased apoptosis, suggesting a role of XBP1 signalling in protein accumulation and/or degradation. Transcriptomic analysis of chondrocytes extracted from wild type, EDM5, Xbp1-null and compound mutant lines revealed that the alternative splicing of Xbp1 is crucial in modulating levels of protein aggregation. Moreover, through detailed transcriptomic comparison with a model of metaphyseal chondrodysplasia type Schmid (MCDS), an UPR-related skeletal condition in which XBP1 was removed without overt consequences, we show for the first time that the differentiation-state of cells within the cartilage growth plate influences the UPR resulting from retention of a misfolded mutant protein and postulate that modulation of XBP1 signalling pathway presents a therapeutic target for aggregation related conditions in cells undergoing proliferation.
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Affiliation(s)
- Katarzyna A. Piróg
- Institute of Genetic Medicine, Newcastle University, Newcastle, United Kingdom
- * E-mail:
| | - Ella P. Dennis
- Institute of Genetic Medicine, Newcastle University, Newcastle, United Kingdom
| | - Claire L. Hartley
- Wellcome Trust Centre for Cell Matrix Research, University of Manchester, Manchester, United Kingdom
| | - Robert M. Jackson
- Institute of Genetic Medicine, Newcastle University, Newcastle, United Kingdom
| | - Jamie Soul
- Wellcome Trust Centre for Cell Matrix Research, University of Manchester, Manchester, United Kingdom
| | - Jean-Marc Schwartz
- Wellcome Trust Centre for Cell Matrix Research, University of Manchester, Manchester, United Kingdom
| | - John F. Bateman
- Murdoch Children's Research Institute, Parkville, Victoria, Australia
| | - Raymond P. Boot-Handford
- Wellcome Trust Centre for Cell Matrix Research, University of Manchester, Manchester, United Kingdom
| | - Michael D. Briggs
- Institute of Genetic Medicine, Newcastle University, Newcastle, United Kingdom
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Zhou W, Fang H, Wu Q, Wang X, Liu R, Li F, Xiao J, Yuan L, Zhou Z, Ma J, Wang L, Zhao W, You H, Ju J, Feng J, Chen C. Ilamycin E, a natural product of marine actinomycete, inhibits triple-negative breast cancer partially through ER stress-CHOP-Bcl-2. Int J Biol Sci 2019; 15:1723-1732. [PMID: 31360114 PMCID: PMC6643221 DOI: 10.7150/ijbs.35284] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2019] [Accepted: 05/19/2019] [Indexed: 12/28/2022] Open
Abstract
Breast cancer is the most commonly diagnosed cancer and the leading cause of cancer death among women in the worldwide. Triple-negative breast cancer (TNBC) has a poor clinical outcome. The antitumor efficacy of Ilamycins, natural products with anti-tuberculosis activity isolated from deep sea-derived Streptomyces atratus, in TNBC has not been investigated, and the mechanisms remain elusive. Here, we demonstrated that Ilamycin-E, but not -F, decreases cell viability, inhibits G1/S cell cycle progression, and promotes apoptosis in the TNBC cell lines HCC1937 and MDA-MB-468. Ilamycin E promotes apoptosis via activation of endoplasmic reticulum (ER) stress, increasing the expression of CHOP, and down-regulating the expression of anti-apoptotic protein Bcl-2. Depletion of CHOP or overexpression of Bcl2 significantly rescued Ilamycin E-induced apoptosis. These findings indicate that Ilamycin E has anti-cancer activity in TNBC.
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Affiliation(s)
- Wenhui Zhou
- Department of Laboratory Medicine & Central Laboratory, Southern Medical University Affiliated Fengxian Hospital, Shanghai, China, 201499
- Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences and Yunnan Province, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, China, 650223
- Hubei Key Laboratory of Embryonic Stem Cell Research, Biomedical Research Institute, Hubei University of Medicine, Shiyan, Hubei, China, 442000
| | - Huan Fang
- Department of Laboratory Medicine & Central Laboratory, Southern Medical University Affiliated Fengxian Hospital, Shanghai, China, 201499
- Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences and Yunnan Province, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, China, 650223
- Fengxian District Center Hospital Graduate Student Training Base, Anhui University of Science & Technology, Shanghai, China, 201499
| | - Qiuju Wu
- Department of Laboratory Medicine & Central Laboratory, Southern Medical University Affiliated Fengxian Hospital, Shanghai, China, 201499
- Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences and Yunnan Province, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, China, 650223
- Fengxian District Center Hospital Graduate Student Training Base, Jinzhou Medical University, Shanghai, China, 201499
| | - Xinye Wang
- Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences and Yunnan Province, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, China, 650223
| | - Rong Liu
- Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences and Yunnan Province, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, China, 650223
- Center for Excellence in Animal Evolution and Genetics, Chinese Academy of Sciences, Kunming, China, 650223
| | - Fubin Li
- Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences and Yunnan Province, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, China, 650223
| | - Ji Xiao
- Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences and Yunnan Province, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, China, 650223
| | - Lin Yuan
- Fengxian District Center Hospital Graduate Student Training Base, Jinzhou Medical University, Shanghai, China, 201499
| | - Zhongmei Zhou
- Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences and Yunnan Province, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, China, 650223
| | - Junying Ma
- CAS Key Laboratory of Marine Bio-resources Sustainable Utilization, Guangdong Key Laboratory of Marine Materia Medica, RNAM Center for Marine Microbiology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China, 510301
| | - Lulu Wang
- Affiliated Cancer Hospital& Institute of Guangzhou Medical University, Guangzhou, China, 510095
| | - Weiwei Zhao
- Shanghai University of Medicine & Health Sciences, Affiliated Sixth People's Hospital South Campus, Shanghai, China, 201499
| | - Hua You
- Affiliated Cancer Hospital& Institute of Guangzhou Medical University, Guangzhou, China, 510095
| | - Jianhua Ju
- CAS Key Laboratory of Marine Bio-resources Sustainable Utilization, Guangdong Key Laboratory of Marine Materia Medica, RNAM Center for Marine Microbiology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China, 510301
| | - Jing Feng
- Department of Laboratory Medicine & Central Laboratory, Southern Medical University Affiliated Fengxian Hospital, Shanghai, China, 201499
- Shanghai University of Medicine & Health Sciences, Affiliated Sixth People's Hospital South Campus, Shanghai, China, 201499
| | - Ceshi Chen
- Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences and Yunnan Province, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, China, 650223
- Affiliated Cancer Hospital& Institute of Guangzhou Medical University, Guangzhou, China, 510095
- KIZ-CUHK Joint Laboratory of Bioresources and Molecular Research in Common Diseases, Kunming Institute of Zoology, Chinese Academy of Sciences
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Weidling I, Swerdlow RH. Mitochondrial Dysfunction and Stress Responses in Alzheimer's Disease. BIOLOGY 2019; 8:biology8020039. [PMID: 31083585 PMCID: PMC6627276 DOI: 10.3390/biology8020039] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/04/2018] [Revised: 01/04/2019] [Accepted: 01/16/2019] [Indexed: 02/04/2023]
Abstract
Alzheimer's disease (AD) patients display widespread mitochondrial defects. Brain hypometabolism occurs alongside mitochondrial defects, and correlates well with cognitive decline. Numerous theories attempt to explain AD mitochondrial dysfunction. Groups propose AD mitochondrial defects stem from: (1) mitochondrial-nuclear DNA interactions/variations; (2) amyloid and neurofibrillary tangle interactions with mitochondria, and (3) mitochondrial quality control defects and oxidative damage. Cells respond to mitochondrial dysfunction through numerous retrograde responses including the Integrated Stress Response (ISR) involving eukaryotic initiation factor 2α (eIF2α), activating transcription factor 4 (ATF4) and C/EBP homologous protein (CHOP). AD brains activate the ISR and we hypothesize mitochondrial defects may contribute to ISR activation. Here we review current recognized contributions of the mitochondria to AD, with an emphasis on their potential contribution to brain stress responses.
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Affiliation(s)
- Ian Weidling
- University of Kansas Alzheimer's Disease Center, Fairway, KS 66205, USA.
- Department of Integrated and Molecular Physiology, University of Kansas Medical Center, Kansas City, KS 66160, USA.
| | - Russell H Swerdlow
- University of Kansas Alzheimer's Disease Center, Fairway, KS 66205, USA.
- Department of Integrated and Molecular Physiology, University of Kansas Medical Center, Kansas City, KS 66160, USA.
- Department of Neurology, University of Kansas Medical Center, Kansas City, KS 66160, USA.
- Department of Biochemistry and Molecular Biology, University of Kansas Medical Center, Kansas City, KS 66160, USA.
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Klymenko O, Huehn M, Wilhelm J, Wasnick R, Shalashova I, Ruppert C, Henneke I, Hezel S, Guenther K, Mahavadi P, Samakovlis C, Seeger W, Guenther A, Korfei M. Regulation and role of the ER stress transcription factor CHOP in alveolar epithelial type-II cells. J Mol Med (Berl) 2019; 97:973-990. [PMID: 31025089 PMCID: PMC6581940 DOI: 10.1007/s00109-019-01787-9] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2018] [Revised: 03/29/2019] [Accepted: 04/04/2019] [Indexed: 01/27/2023]
Abstract
Abstract Idiopathic pulmonary fibrosis (IPF) is a fatal disease characterized by type-II alveolar epithelial cell (AECII) injury and fibroblast hyperproliferation. Severe AECII endoplasmic reticulum (ER) stress is thought to underlie IPF, but is yet incompletely understood. We studied the regulation of C/EBP homologous protein (CHOP), a proapoptotic ER-stress-related transcription factor (TF) in AECII-like cells. Interestingly, single or combined overexpression of the active ER stress transducers activating transcription factor-4 (Atf4) and activating transcription factor-6 (p50Atf6) or spliced x-box-binding protein-1 (sXbp1) in MLE12 cells did not result in a substantial Chop induction, as compared to the ER stress inducer thapsigargin. Employing reporter gene assays of distinct CHOP promoter fragments, we could identify that, next to the conventional amino acid (AARE) and ER stress response elements (ERSE) within the CHOP promoter, activator protein-1 (AP-1) and c-Ets-1 TF binding sites are necessary for CHOP induction. Serial deletion and mutation analyses revealed that both AP-1 and c-Ets-1 motifs act in concert to induce CHOP expression. In agreement, CHOP promoter activity was greatly enhanced upon combined versus single overexpression of AP-1 and c-Ets-1. Moreover, combined overexpression of AP-1 and c-Ets-1 in MLE12 cells alone in the absence of any other ER stress inducer was sufficient to induce Chop protein expression. Further, AP-1 and c-Ets-1 were upregulated in AECII under ER stress conditions and in human IPF. Finally, Chop overexpression in vitro resulted in AECII apoptosis, lung fibroblast proliferation, and collagen-I production. We propose that CHOP activation by AP-1 and c-Ets-1 plays a key role in AECII maladaptive ER stress responses and consecutive fibrosis, offering new therapeutic prospects in IPF. Key messages Overexpression of active ER stress sensors Atf4, Atf6, and Xbp1 does not induce Chop. AP-1 and c-Ets-1 TFs are necessary for induction of the ER stress factor Chop. AP-1 and c-Ets-1 alone induce Chop expression in the absence of any ER stress inducers. AP-1 and c-Ets-1 are induced in AECII under ER stress conditions and in human IPF. Chop expression alone triggers AECII apoptosis and consecutive profibrotic responses.
Electronic supplementary material The online version of this article (10.1007/s00109-019-01787-9) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Oleksiy Klymenko
- Department of Internal Medicine, Justus-Liebig-University Giessen, Klinikstrasse 36, 35392, Giessen, Germany
- German Center for Lung Research (DZL), Universities of Giessen and Marburg Lung Center (UGMLC), 35392, Giessen, Germany
| | - Martin Huehn
- Department of Internal Medicine, Justus-Liebig-University Giessen, Klinikstrasse 36, 35392, Giessen, Germany
- German Center for Lung Research (DZL), Universities of Giessen and Marburg Lung Center (UGMLC), 35392, Giessen, Germany
| | - Jochen Wilhelm
- Department of Internal Medicine, Justus-Liebig-University Giessen, Klinikstrasse 36, 35392, Giessen, Germany
- German Center for Lung Research (DZL), Universities of Giessen and Marburg Lung Center (UGMLC), 35392, Giessen, Germany
| | - Roxana Wasnick
- Department of Internal Medicine, Justus-Liebig-University Giessen, Klinikstrasse 36, 35392, Giessen, Germany
- German Center for Lung Research (DZL), Universities of Giessen and Marburg Lung Center (UGMLC), 35392, Giessen, Germany
| | - Irina Shalashova
- Department of Internal Medicine, Justus-Liebig-University Giessen, Klinikstrasse 36, 35392, Giessen, Germany
- German Center for Lung Research (DZL), Universities of Giessen and Marburg Lung Center (UGMLC), 35392, Giessen, Germany
| | - Clemens Ruppert
- Department of Internal Medicine, Justus-Liebig-University Giessen, Klinikstrasse 36, 35392, Giessen, Germany
- German Center for Lung Research (DZL), Universities of Giessen and Marburg Lung Center (UGMLC), 35392, Giessen, Germany
- Excellence Cluster Cardiopulmonary System (ECCPS), 35392, Giessen, Germany
| | - Ingrid Henneke
- Department of Internal Medicine, Justus-Liebig-University Giessen, Klinikstrasse 36, 35392, Giessen, Germany
- German Center for Lung Research (DZL), Universities of Giessen and Marburg Lung Center (UGMLC), 35392, Giessen, Germany
| | - Stefanie Hezel
- Department of Internal Medicine, Justus-Liebig-University Giessen, Klinikstrasse 36, 35392, Giessen, Germany
- German Center for Lung Research (DZL), Universities of Giessen and Marburg Lung Center (UGMLC), 35392, Giessen, Germany
| | - Katharina Guenther
- Department of Internal Medicine, Justus-Liebig-University Giessen, Klinikstrasse 36, 35392, Giessen, Germany
- German Center for Lung Research (DZL), Universities of Giessen and Marburg Lung Center (UGMLC), 35392, Giessen, Germany
| | - Poornima Mahavadi
- Department of Internal Medicine, Justus-Liebig-University Giessen, Klinikstrasse 36, 35392, Giessen, Germany
- German Center for Lung Research (DZL), Universities of Giessen and Marburg Lung Center (UGMLC), 35392, Giessen, Germany
| | - Christos Samakovlis
- Department of Internal Medicine, Justus-Liebig-University Giessen, Klinikstrasse 36, 35392, Giessen, Germany
- German Center for Lung Research (DZL), Universities of Giessen and Marburg Lung Center (UGMLC), 35392, Giessen, Germany
- Excellence Cluster Cardiopulmonary System (ECCPS), 35392, Giessen, Germany
- Department of Molecular Biosciences, The Wenner-Gren Institute, Stockholm University, SE-106 91, Stockholm, Sweden
| | - Werner Seeger
- Department of Internal Medicine, Justus-Liebig-University Giessen, Klinikstrasse 36, 35392, Giessen, Germany
- German Center for Lung Research (DZL), Universities of Giessen and Marburg Lung Center (UGMLC), 35392, Giessen, Germany
- Excellence Cluster Cardiopulmonary System (ECCPS), 35392, Giessen, Germany
- Department of Lung Development and Remodeling, Max-Planck-Institute for Heart and Lung Research, 61231, Bad Nauheim, Germany
| | - Andreas Guenther
- Department of Internal Medicine, Justus-Liebig-University Giessen, Klinikstrasse 36, 35392, Giessen, Germany.
- German Center for Lung Research (DZL), Universities of Giessen and Marburg Lung Center (UGMLC), 35392, Giessen, Germany.
- Excellence Cluster Cardiopulmonary System (ECCPS), 35392, Giessen, Germany.
- European IPF Network and European IPF Registry, Giessen, Germany.
- Agaplesion Lung Clinic Waldhof-Elgershausen, 35753, Greifenstein, Germany.
| | - Martina Korfei
- Department of Internal Medicine, Justus-Liebig-University Giessen, Klinikstrasse 36, 35392, Giessen, Germany
- German Center for Lung Research (DZL), Universities of Giessen and Marburg Lung Center (UGMLC), 35392, Giessen, Germany
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Stressed: The Unfolded Protein Response in T Cell Development, Activation, and Function. Int J Mol Sci 2019; 20:ijms20071792. [PMID: 30978945 PMCID: PMC6479341 DOI: 10.3390/ijms20071792] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2019] [Revised: 04/04/2019] [Accepted: 04/08/2019] [Indexed: 12/27/2022] Open
Abstract
The unfolded protein response (UPR) is a highly conserved pathway that allows cells to respond to stress in the endoplasmic reticulum caused by an accumulation of misfolded and unfolded protein. This is of great importance to secretory cells because, in order for proteins to traffic from the endoplasmic reticulum (ER), they need to be folded appropriately. While a wealth of literature has implicated UPR in immune responses, less attention has been given to the role of UPR in T cell development and function. This review discusses the importance of UPR in T cell development, homeostasis, activation, and effector functions. We also speculate about how UPR may be manipulated in T cells to ameliorate pathologies.
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Gut microbiota dependent anti-tumor immunity restricts melanoma growth in Rnf5 -/- mice. Nat Commun 2019; 10:1492. [PMID: 30940817 PMCID: PMC6445090 DOI: 10.1038/s41467-019-09525-y] [Citation(s) in RCA: 100] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2018] [Accepted: 03/14/2019] [Indexed: 12/30/2022] Open
Abstract
Accumulating evidence points to an important role for the gut microbiome in anti-tumor immunity. Here, we show that altered intestinal microbiota contributes to anti-tumor immunity, limiting tumor expansion. Mice lacking the ubiquitin ligase RNF5 exhibit attenuated activation of the unfolded protein response (UPR) components, which coincides with increased expression of inflammasome components, recruitment and activation of dendritic cells and reduced expression of antimicrobial peptides in intestinal epithelial cells. Reduced UPR expression is also seen in murine and human melanoma tumor specimens that responded to immune checkpoint therapy. Co-housing of Rnf5−/− and WT mice abolishes the anti-tumor immunity and tumor inhibition phenotype, whereas transfer of 11 bacterial strains, including B. rodentium, enriched in Rnf5−/− mice, establishes anti-tumor immunity and restricts melanoma growth in germ-free WT mice. Altered UPR signaling, exemplified in Rnf5−/− mice, coincides with altered gut microbiota composition and anti-tumor immunity to control melanoma growth. RNF5 is a ubiquitin ligase regulating ER stress response. Here the authors show that Rnf5 deficiency potentiates immune response against melanoma via altered microbiota, and isolate bacterial strains that confer the same phenotype to wild type mice.
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50
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Endoplasmic reticulum proteostasis control and gastric cancer. Cancer Lett 2019; 449:263-271. [PMID: 30776479 DOI: 10.1016/j.canlet.2019.01.034] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2018] [Revised: 01/16/2019] [Accepted: 01/26/2019] [Indexed: 02/07/2023]
Abstract
The endoplasmic reticulum (ER) is the primary organelle responsible for the synthesis, modification, folding and secretion of proteins, especially in specialized secretory cells. It also contributes to the maintenance of cellular functions, such as Ca2+ storage, lipogenesis, gluconeogenesis, and organelle biogenesis. Cellular stress conditions, such as glucose deprivation, hypoxia and disturbance of Ca2+ homeostasis, may increase the risk of protein misfolding and perturb proteostasis. This activates ER stress and triggers the unfolded protein response (UPR), leading to either the restoration of homeostasis or cell death. ER stress and UPR have been shown to play crucial roles in the pathogenesis, progression and treatment response of various cancers. In gastric cancer (GC), one of the most aggressive cancer types, critical functions of ER stress signaling have also started to emerge. Herein, we summarize the current knowledge linking ER stress and UPR to GC; we also discuss the possible nodes of therapeutic intervention and propose directions of future research.
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