1
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Scimeca M, Bischof J, Bonfiglio R, Nale E, Iacovelli V, Carilli M, Vittori M, Agostini M, Rovella V, Servadei F, Giacobbi E, Candi E, Shi Y, Melino G, Mauriello A, Bove P. Molecular profiling of a bladder cancer with very high tumour mutational burden. Cell Death Discov 2024; 10:202. [PMID: 38688924 PMCID: PMC11061316 DOI: 10.1038/s41420-024-01883-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2024] [Revised: 02/16/2024] [Accepted: 02/22/2024] [Indexed: 05/02/2024] Open
Abstract
The increasing incidence of urothelial bladder cancer is a notable global concern, as evidenced by the epidemiological data in terms of frequency, distribution, as well as mortality rates. Although numerous molecular alterations have been linked to the occurrence and progression of bladder cancer, currently there is a limited knowledge on the molecular signature able of accurately predicting clinical outcomes. In this report, we present a case of a pT3b high-grade infiltrating urothelial carcinoma with areas of squamous differentiation characterized by very high tumor mutational burden (TMB), with up-regulations of immune checkpoints. The high TMB, along with elevated expressions of PD-L1, PD-L2, and PD1, underscores the rationale for developing a personalized immunotherapy focused on the use of immune-checkpoint inhibitors. Additionally, molecular analysis revealed somatic mutations in several other cancer-related genes, including TP53, TP63 and NOTCH3. Mutations of TP53 and TP63 genes provide mechanistic insights on the molecular mechanisms underlying disease development and progression. Notably, the above-mentioned mutations and the elevated hypoxia score make the targeting of p53 and/or hypoxia related pathways a plausible personalized medicine option for this bladder cancer, particularly in combination with immunotherapy. Our data suggest a requirement for molecular profiling in bladder cancer to possibly select appropriate immune-checkpoint therapy.
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Affiliation(s)
- Manuel Scimeca
- Department of Experimental Medicine, TOR, University of Rome "Tor Vergata", 00133, Rome, Italy
| | - Julia Bischof
- Indivumed GmbH, Falkenried, 88 Building D, 20251, Hamburg, Germany
| | - Rita Bonfiglio
- Department of Experimental Medicine, TOR, University of Rome "Tor Vergata", 00133, Rome, Italy
| | - Elisabetta Nale
- Indivumed GmbH, Falkenried, 88 Building D, 20251, Hamburg, Germany
| | - Valerio Iacovelli
- Urology Unit San Carlo di Nancy Hospital, GVM Care, 00100, Rome, Italy
| | - Marco Carilli
- Urology Unit San Carlo di Nancy Hospital, GVM Care, 00100, Rome, Italy
| | - Matteo Vittori
- Urology Unit San Carlo di Nancy Hospital, GVM Care, 00100, Rome, Italy
| | - Massimiliano Agostini
- Department of Experimental Medicine, TOR, University of Rome "Tor Vergata", 00133, Rome, Italy
| | - Valentina Rovella
- Department of System Medicine, University of Rome "Tor Vergata", 00133, Rome, Italy
| | - Francesca Servadei
- Department of Experimental Medicine, TOR, University of Rome "Tor Vergata", 00133, Rome, Italy
| | - Erica Giacobbi
- Department of Experimental Medicine, TOR, University of Rome "Tor Vergata", 00133, Rome, Italy
| | - Eleonora Candi
- Department of Experimental Medicine, TOR, University of Rome "Tor Vergata", 00133, Rome, Italy
| | - Yufang Shi
- The Third Affiliated Hospital of Soochow University, Institutes for Translational Medicine, Soochow University, Suzhou, 215000, China
| | - Gerry Melino
- Department of Experimental Medicine, TOR, University of Rome "Tor Vergata", 00133, Rome, Italy
| | - Alessandro Mauriello
- Department of Experimental Medicine, TOR, University of Rome "Tor Vergata", 00133, Rome, Italy.
| | - Pierluigi Bove
- Urology Unit San Carlo di Nancy Hospital, GVM Care, 00100, Rome, Italy.
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2
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Scimeca M, Rovella V, Caporali S, Shi Y, Bischof J, Woodsmith J, Tisone G, Sica G, Amelio I, Melino G, Mauriello A, Bove P. Genetically driven predisposition leads to an unusually genomic unstable renal cell carcinoma. Discov Oncol 2024; 15:80. [PMID: 38512353 PMCID: PMC10957849 DOI: 10.1007/s12672-024-00894-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/18/2023] [Accepted: 02/16/2024] [Indexed: 03/23/2024] Open
Abstract
Renal cell carcinoma originates from the lining of the proximal convoluted renal tubule and represents the most common type of kidney cancer. Risk factors and comorbidities might be associated to renal cell carcinoma, while a small fraction of 2-3% emerges from patients with predisposing cancer syndromes, typically associated to hereditary mutations in VHL, folliculin, fumarate hydratase or MET genes. Here, we report a case of renal cell carcinoma in patient with concurrent germline mutations in BRCA1 and RAD51 genes. This case displays an unusual high mutational burden and chromosomal aberrations compared to the typical profile of renal cell carcinoma. Mutational analysis on whole genome sequencing revealed an enrichment of the MMR2 mutational signature, which is indicative of impaired DNA repair capacity. Overall, the tumor displayed a profile of unusual high genomic instability which suggests a possible origin from germline predisposing mutations in the DNA repair genes BRCA1 and RAD51. While BRCA1 and RAD51 germline mutations are well-characterised in breast and ovarian cancer, their role in renal cell carcinoma is still largely unexplored. The genomic instability detected in this case of renal cell carcinoma, along with the presence of unusual mutations, might offer support to clinicians for the development of patient-tailored therapies.
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Affiliation(s)
- Manuel Scimeca
- Department of Experimental Medicine, TOR, University of Rome Tor Vergata, 00133, Rome, Italy
| | - Valentina Rovella
- Department of Experimental Medicine, TOR, University of Rome Tor Vergata, 00133, Rome, Italy
| | - Sabrina Caporali
- Division for Systems Toxicology, Department of Biology, University of Konstanz, 78457, Konstanz, Germany
| | - Yufang Shi
- The Third Affiliated Hospital of Soochow University, Institutes for Translational Medicine, Soochow University, Suzhou, 215000, China
| | - Julia Bischof
- Indivumed GmbH, Falkenried, 88 Building D, 20251, Hamburg, Germany
| | | | - Giuseppe Tisone
- Department of Surgery, TOR, University of Rome Tor Vergata, 00133, Rome, Italy
| | - Giuseppe Sica
- Department of Surgery, TOR, University of Rome Tor Vergata, 00133, Rome, Italy
| | - Ivano Amelio
- Division for Systems Toxicology, Department of Biology, University of Konstanz, 78457, Konstanz, Germany
| | - Gerry Melino
- Department of Experimental Medicine, TOR, University of Rome Tor Vergata, 00133, Rome, Italy.
| | - Alessandro Mauriello
- Department of Experimental Medicine, TOR, University of Rome Tor Vergata, 00133, Rome, Italy.
| | - Pierluigi Bove
- Department of Surgery, TOR, University of Rome Tor Vergata, 00133, Rome, Italy.
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3
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Hou P, Fang J, Liu Z, Shi Y, Agostini M, Bernassola F, Bove P, Candi E, Rovella V, Sica G, Sun Q, Wang Y, Scimeca M, Federici M, Mauriello A, Melino G. Macrophage polarization and metabolism in atherosclerosis. Cell Death Dis 2023; 14:691. [PMID: 37863894 PMCID: PMC10589261 DOI: 10.1038/s41419-023-06206-z] [Citation(s) in RCA: 29] [Impact Index Per Article: 29.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2023] [Revised: 09/27/2023] [Accepted: 09/29/2023] [Indexed: 10/22/2023]
Abstract
Atherosclerosis is a chronic inflammatory disease characterized by the accumulation of fatty deposits in the inner walls of vessels. These plaques restrict blood flow and lead to complications such as heart attack or stroke. The development of atherosclerosis is influenced by a variety of factors, including age, genetics, lifestyle, and underlying health conditions such as high blood pressure or diabetes. Atherosclerotic plaques in stable form are characterized by slow growth, which leads to luminal stenosis, with low embolic potential or in unstable form, which contributes to high risk for thrombotic and embolic complications with rapid clinical onset. In this complex scenario of atherosclerosis, macrophages participate in the whole process, including the initiation, growth and eventually rupture and wound healing stages of artery plaque formation. Macrophages in plaques exhibit high heterogeneity and plasticity, which affect the evolving plaque microenvironment, e.g., leading to excessive lipid accumulation, cytokine hyperactivation, hypoxia, apoptosis and necroptosis. The metabolic and functional transitions of plaque macrophages in response to plaque microenvironmental factors not only influence ongoing and imminent inflammatory responses within the lesions but also directly dictate atherosclerotic progression or regression. In this review, we discuss the origin of macrophages within plaques, their phenotypic diversity, metabolic shifts, and fate and the roles they play in the dynamic progression of atherosclerosis. It also describes how macrophages interact with other plaque cells, particularly T cells. Ultimately, targeting pathways involved in macrophage polarization may lead to innovative and promising approaches for precision medicine. Further insights into the landscape and biological features of macrophages within atherosclerotic plaques may offer valuable information for optimizing future clinical treatment for atherosclerosis by targeting macrophages.
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Affiliation(s)
- Pengbo Hou
- Department of Experimental Medicine, TOR, University of Rome Tor Vergata, Rome, Italy
- The First Affiliated Hospital of Soochow University, Institutes for Translational Medicine, State Key Laboratory of Radiation Medicine and Protection, Suzhou Medical College of Soochow University, Suzhou, China
| | - Jiankai Fang
- The First Affiliated Hospital of Soochow University, Institutes for Translational Medicine, State Key Laboratory of Radiation Medicine and Protection, Suzhou Medical College of Soochow University, Suzhou, China
| | - Zhanhong Liu
- Department of Experimental Medicine, TOR, University of Rome Tor Vergata, Rome, Italy
- The First Affiliated Hospital of Soochow University, Institutes for Translational Medicine, State Key Laboratory of Radiation Medicine and Protection, Suzhou Medical College of Soochow University, Suzhou, China
| | - Yufang Shi
- The First Affiliated Hospital of Soochow University, Institutes for Translational Medicine, State Key Laboratory of Radiation Medicine and Protection, Suzhou Medical College of Soochow University, Suzhou, China
| | - Massimiliano Agostini
- Department of Experimental Medicine, TOR, University of Rome Tor Vergata, Rome, Italy
| | - Francesca Bernassola
- Department of Experimental Medicine, TOR, University of Rome Tor Vergata, Rome, Italy
| | - Pierluigi Bove
- Department of Experimental Medicine, TOR, University of Rome Tor Vergata, Rome, Italy
| | - Eleonora Candi
- Department of Experimental Medicine, TOR, University of Rome Tor Vergata, Rome, Italy
| | - Valentina Rovella
- Department of System Medicine, University of Rome Tor Vergata, Rome, Italy
| | - Giuseppe Sica
- Department of Experimental Medicine, TOR, University of Rome Tor Vergata, Rome, Italy
| | - Qiang Sun
- Department of Experimental Medicine, TOR, University of Rome Tor Vergata, Rome, Italy
- The First Affiliated Hospital of Soochow University, Institutes for Translational Medicine, State Key Laboratory of Radiation Medicine and Protection, Suzhou Medical College of Soochow University, Suzhou, China
| | - Ying Wang
- Department of Experimental Medicine, TOR, University of Rome Tor Vergata, Rome, Italy
- The First Affiliated Hospital of Soochow University, Institutes for Translational Medicine, State Key Laboratory of Radiation Medicine and Protection, Suzhou Medical College of Soochow University, Suzhou, China
| | - Manuel Scimeca
- Department of Experimental Medicine, TOR, University of Rome Tor Vergata, Rome, Italy
| | - Massimo Federici
- Department of System Medicine, University of Rome Tor Vergata, Rome, Italy.
| | - Alessandro Mauriello
- Department of Experimental Medicine, TOR, University of Rome Tor Vergata, Rome, Italy.
| | - Gerry Melino
- Department of Experimental Medicine, TOR, University of Rome Tor Vergata, Rome, Italy.
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4
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Yang X, Wang Y, Rovella V, Candi E, Jia W, Bernassola F, Bove P, Piacentini M, Scimeca M, Sica G, Tisone G, Mauriello A, Wei L, Melino G, Shi Y. Aged mesenchymal stem cells and inflammation: from pathology to potential therapeutic strategies. Biol Direct 2023; 18:40. [PMID: 37464416 PMCID: PMC10353240 DOI: 10.1186/s13062-023-00394-6] [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: 06/17/2023] [Accepted: 06/27/2023] [Indexed: 07/20/2023] Open
Abstract
Natural ageing of organisms and corresponding age-related diseases result mainly from stem cell ageing and "inflammaging". Mesenchymal stem cells (MSCs) exhibit very high immune-regulating capacity and are promising candidates for immune-related disease treatment. However, the effect of MSC application is not satisfactory for some patients, especially in elderly individuals. With ageing, MSCs undergo many changes, including altered cell population reduction and differentiation ability, reduced migratory and homing capacity and, most important, defective immunosuppression. It is necessary to explore the relationship between the "inflammaging" and aged MSCs to prevent age-related diseases and increase the therapeutic effects of MSCs. In this review, we discuss changes in naturally ageing MSCs mainly from an inflammation perspective and propose some ideas for rejuvenating aged MSCs in future treatments.
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Affiliation(s)
- Xue Yang
- Department of Experimental Medicine, TOR, University of Rome Tor Vergata, Rome, 00133 Italy
- The Third Affiliated Hospital of Soochow University, Institutes for Translational Medicine, State Key Laboratory of Radiation Medicine and Protection, Medical College of Soochow University, Suzhou, Jiangsu China
| | - Ying Wang
- The Third Affiliated Hospital of Soochow University, Institutes for Translational Medicine, State Key Laboratory of Radiation Medicine and Protection, Medical College of Soochow University, Suzhou, Jiangsu China
| | - Valentina Rovella
- Department of Experimental Medicine, TOR, University of Rome Tor Vergata, Rome, 00133 Italy
| | - Eleonora Candi
- Department of Experimental Medicine, TOR, University of Rome Tor Vergata, Rome, 00133 Italy
| | - Wei Jia
- Center for Translational Medicine, Shanghai Key Laboratory of Diabetes Mellitus, Shanghai Sixth People’s Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200233 China
- School of Chinese Medicine, Hong Kong Baptist University, Kowloon Tong, Hong Kong China
| | - Francesca Bernassola
- Department of Experimental Medicine, TOR, University of Rome Tor Vergata, Rome, 00133 Italy
| | - Pierluigi Bove
- Department of Experimental Medicine, TOR, University of Rome Tor Vergata, Rome, 00133 Italy
| | - Mauro Piacentini
- Department of Experimental Medicine, TOR, University of Rome Tor Vergata, Rome, 00133 Italy
| | - Manuel Scimeca
- Department of Experimental Medicine, TOR, University of Rome Tor Vergata, Rome, 00133 Italy
| | - Giuseppe Sica
- Department of Experimental Medicine, TOR, University of Rome Tor Vergata, Rome, 00133 Italy
| | - Giuseppe Tisone
- Department of Experimental Medicine, TOR, University of Rome Tor Vergata, Rome, 00133 Italy
| | - Alessandro Mauriello
- Department of Experimental Medicine, TOR, University of Rome Tor Vergata, Rome, 00133 Italy
| | - Lixin Wei
- Department of Tumor Immunology and Gene Therapy Center, Third Affiliated Hospital of Naval Medical University, Shanghai, 200438 China
| | - Gerry Melino
- Department of Experimental Medicine, TOR, University of Rome Tor Vergata, Rome, 00133 Italy
| | - Yufang Shi
- The Third Affiliated Hospital of Soochow University, Institutes for Translational Medicine, State Key Laboratory of Radiation Medicine and Protection, Medical College of Soochow University, Suzhou, Jiangsu China
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5
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Scimeca M, Rovella V, Palumbo V, Scioli MP, Bonfiglio R, Tor Centre, Melino G, Piacentini M, Frati L, Agostini M, Candi E, Mauriello A. Programmed Cell Death Pathways in Cholangiocarcinoma: Opportunities for Targeted Therapy. Cancers (Basel) 2023; 15:3638. [PMID: 37509299 PMCID: PMC10377326 DOI: 10.3390/cancers15143638] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Revised: 07/06/2023] [Accepted: 07/12/2023] [Indexed: 07/30/2023] Open
Abstract
Cholangiocarcinoma is a highly aggressive cancer arising from the bile ducts. The limited effectiveness of conventional therapies has prompted the search for new approaches to target this disease. Recent evidence suggests that distinct programmed cell death mechanisms, namely, apoptosis, ferroptosis, pyroptosis and necroptosis, play a critical role in the development and progression of cholangiocarcinoma. This review aims to summarize the current knowledge on the role of programmed cell death in cholangiocarcinoma and its potential implications for the development of novel therapies. Several studies have shown that the dysregulation of apoptotic signaling pathways contributes to cholangiocarcinoma tumorigenesis and resistance to treatment. Similarly, ferroptosis, pyroptosis and necroptosis, which are pro-inflammatory forms of cell death, have been implicated in promoting immune cell recruitment and activation, thus enhancing the antitumor immune response. Moreover, recent studies have suggested that targeting cell death pathways could sensitize cholangiocarcinoma cells to chemotherapy and immunotherapy. In conclusion, programmed cell death represents a relevant molecular mechanism of pathogenesis in cholangiocarcinoma, and further research is needed to fully elucidate the underlying details and possibly identify therapeutic strategies.
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Affiliation(s)
- Manuel Scimeca
- Department of Experimental Medicine, TOR, University of Rome Tor Vergata, 00133 Rome, Italy
| | - Valentina Rovella
- Department of Systems Medicine, University of Rome Tor Vergata, 00133 Rome, Italy
| | - Valeria Palumbo
- Department of Experimental Medicine, TOR, University of Rome Tor Vergata, 00133 Rome, Italy
| | - Maria Paola Scioli
- Department of Experimental Medicine, TOR, University of Rome Tor Vergata, 00133 Rome, Italy
| | - Rita Bonfiglio
- Department of Experimental Medicine, TOR, University of Rome Tor Vergata, 00133 Rome, Italy
| | | | - Gerry Melino
- Department of Experimental Medicine, TOR, University of Rome Tor Vergata, 00133 Rome, Italy
| | - Mauro Piacentini
- Department of Biology, University of Rome Tor Vergata, 00133 Rome, Italy
| | - Luigi Frati
- Institute Pasteur Italy-Cenci Bolognetti Foundation, Via Regina Elena 291, 00161 Rome, Italy
- IRCCS Neuromed S.p.A., Via Atinense 18, 86077 Pozzilli, Italy
| | - Massimiliano Agostini
- Department of Experimental Medicine, TOR, University of Rome Tor Vergata, 00133 Rome, Italy
| | - Eleonora Candi
- Department of Experimental Medicine, TOR, University of Rome Tor Vergata, 00133 Rome, Italy
| | - Alessandro Mauriello
- Department of Experimental Medicine, TOR, University of Rome Tor Vergata, 00133 Rome, Italy
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6
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Wang X, Jiang X, Li B, Zheng J, Guo J, Gao L, Du M, Weng X, Li L, Chen S, Zhang J, Fang L, Liu T, Wang L, Liu W, Neculai D, Sun Q. A regulatory circuit comprising the CBP and SIRT7 regulates FAM134B-mediated ER-phagy. J Cell Biol 2023; 222:e202201068. [PMID: 37043189 PMCID: PMC10103787 DOI: 10.1083/jcb.202201068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2022] [Revised: 11/14/2022] [Accepted: 02/21/2023] [Indexed: 04/13/2023] Open
Abstract
Macroautophagy (autophagy) utilizes a serial of receptors to specifically recognize and degrade autophagy cargoes, including damaged organelles, to maintain cellular homeostasis. Upstream signals spatiotemporally regulate the biological functions of selective autophagy receptors through protein post-translational modifications (PTM) such as phosphorylation. However, it is unclear how acetylation directly controls autophagy receptors in selective autophagy. Here, we report that an ER-phagy receptor FAM134B is acetylated by CBP acetyltransferase, eliciting intense ER-phagy. Furthermore, FAM134B acetylation promoted CAMKII-mediated phosphorylation to sustain a mode of milder ER-phagy. Conversely, SIRT7 deacetylated FAM134B to temper its activities in ER-phagy to avoid excessive ER degradation. Together, this work provides further mechanistic insights into how ER-phagy receptor perceives environmental signals for fine-tuning of ER homeostasis and demonstrates how nucleus-derived factors are programmed to control ER stress by modulating ER-phagy.
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Affiliation(s)
- Xinyi Wang
- Department of Biochemistry, and Department of Cardiology of Second Affiliated Hospital, Zhejiang UniversitySchool of Medicine, Hangzhou, China
| | - Xiao Jiang
- Department of Biochemistry, and Department of Cardiology of Second Affiliated Hospital, Zhejiang UniversitySchool of Medicine, Hangzhou, China
| | - Boran Li
- Department of Biochemistry, and Department of Cardiology of Second Affiliated Hospital, Zhejiang UniversitySchool of Medicine, Hangzhou, China
- International Institutes of Medicine, The Fourth Affiliated Hospital of Zhejiang UniversitySchool of Medicine, Yiwu, China
| | - Jiahua Zheng
- Department of Biochemistry, and Department of Cardiology of Second Affiliated Hospital, Zhejiang UniversitySchool of Medicine, Hangzhou, China
- International Institutes of Medicine, The Fourth Affiliated Hospital of Zhejiang UniversitySchool of Medicine, Yiwu, China
| | - Jiansheng Guo
- Center of Cryo-Electron Microscopy, School of Medicine, Zhejiang University, Hangzhou, China
| | - Lei Gao
- Microscopy Core Facility, Westlake University, Hangzhou, China
| | - Mengjie Du
- Department of Neurology of Second Affiliated Hospital, Institute of Neuroscience, Mental Health Center, NHC and CAMS Key Laboratory of Medical Neurobiology, Zhejiang UniversitySchool of Medicine, Hangzhou, China
| | - Xialian Weng
- Department of Cell Biology, Department of General Surgery of Sir Run Run Shaw Hospital, Zhejiang UniversitySchool of Medicine, Hangzhou, China
| | - Lin Li
- National Institute of Biological Sciences, Beijing, Beijing, China
| | - She Chen
- National Institute of Biological Sciences, Beijing, Beijing, China
| | - Jingzi Zhang
- Jiangsu Key Laboratory of Molecular Medicine, Chemistry and Biomedicine Innovation Center, Medical School of Nanjing University, Nanjing, China
| | - Lei Fang
- Jiangsu Key Laboratory of Molecular Medicine, Chemistry and Biomedicine Innovation Center, Medical School of Nanjing University, Nanjing, China
| | - Ting Liu
- Department of Cell Biology, Department of General Surgery of Sir Run Run Shaw Hospital, Zhejiang UniversitySchool of Medicine, Hangzhou, China
| | - Liang Wang
- Department of Neurology of Second Affiliated Hospital, Institute of Neuroscience, Mental Health Center, NHC and CAMS Key Laboratory of Medical Neurobiology, Zhejiang UniversitySchool of Medicine, Hangzhou, China
| | - Wei Liu
- Department of Biochemistry, and Department of Cardiology of Second Affiliated Hospital, Zhejiang UniversitySchool of Medicine, Hangzhou, China
- International Institutes of Medicine, The Fourth Affiliated Hospital of Zhejiang UniversitySchool of Medicine, Yiwu, China
| | - Dante Neculai
- International Institutes of Medicine, The Fourth Affiliated Hospital of Zhejiang UniversitySchool of Medicine, Yiwu, China
- Department of Cell Biology, Department of General Surgery of Sir Run Run Shaw Hospital, Zhejiang UniversitySchool of Medicine, Hangzhou, China
| | - Qiming Sun
- Department of Biochemistry, and Department of Cardiology of Second Affiliated Hospital, Zhejiang UniversitySchool of Medicine, Hangzhou, China
- International Institutes of Medicine, The Fourth Affiliated Hospital of Zhejiang UniversitySchool of Medicine, Yiwu, China
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7
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Montanaro M, Agostini M, Anemona L, Bonanno E, Servadei F, Finazzi Agrò E, Asimakopoulos AD, Ganini C, Cipriani C, Signoretti M, Bove P, Rugolo F, Imperiali B, Melino G, Mauriello A, Scimeca M. ZNF750: A Novel Prognostic Biomarker in Metastatic Prostate Cancer. Int J Mol Sci 2023; 24:ijms24076519. [PMID: 37047491 PMCID: PMC10095592 DOI: 10.3390/ijms24076519] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2023] [Revised: 03/24/2023] [Accepted: 03/25/2023] [Indexed: 04/03/2023] Open
Abstract
Prostate cancer is the most frequently diagnosed cancer and the fifth leading cause of cancer death among men in 2020. The clinical decision making for prostate cancer patients is based on the stratification of the patients according to both clinical and pathological parameters such as Gleason score and prostate-specific antigen levels. However, these tools still do not adequately predict patient outcome. The aim of this study was to investigate whether ZNF750 could have a role in better stratifying patients, identifying those with a higher risk of metastasis and with the poorest prognosis. The data reported here revealed that ZNF750 protein levels are reduced in human prostate cancer samples, and this reduction is even higher in metastatic samples. Interestingly, nuclear positivity is significantly reduced in patients with metastatic prostate cancer, regardless of both Gleason score and grade group. More importantly, the bioinformatics analysis indicates that ZNF750 expression is positively correlated with better prognosis. Overall, our findings suggest that nuclear expression of ZNF750 may be a reliable prognostic biomarker for metastatic prostate cancer, which lays the foundation for the development of new biological therapies.
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8
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Smirnov A, Melino G, Candi E. Gene expression in organoids: an expanding horizon. Biol Direct 2023; 18:11. [PMID: 36964575 PMCID: PMC10038780 DOI: 10.1186/s13062-023-00360-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2023] [Accepted: 02/20/2023] [Indexed: 03/26/2023] Open
Abstract
Recent development of human three-dimensional organoid cultures has opened new doors and opportunities ranging from modelling human development in vitro to personalised cancer therapies. These new in vitro systems are opening new horizons to the classic understanding of human development and disease. However, the complexity and heterogeneity of these models requires cutting-edge techniques to capture and trace global changes in gene expression to enable identification of key players and uncover the underlying molecular mechanisms. Rapid development of sequencing approaches made possible global transcriptome analyses and epigenetic profiling. Despite challenges in organoid culture and handling, these techniques are now being adapted to embrace organoids derived from a wide range of human tissues. Here, we review current state-of-the-art multi-omics technologies, such as single-cell transcriptomics and chromatin accessibility assays, employed to study organoids as a model for development and a platform for precision medicine.
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Affiliation(s)
- Artem Smirnov
- Department of Experimental Medicine, Torvergata Oncoscience Research, University of Rome "Tor Vergata", Via Montpellier 1, 00133, Rome, Italy
| | - Gerry Melino
- Department of Experimental Medicine, Torvergata Oncoscience Research, University of Rome "Tor Vergata", Via Montpellier 1, 00133, Rome, Italy
| | - Eleonora Candi
- Department of Experimental Medicine, Torvergata Oncoscience Research, University of Rome "Tor Vergata", Via Montpellier 1, 00133, Rome, Italy.
- Biochemistry Laboratory, Istituto Dermopatico Immacolata (IDI-IRCCS), 00166, Rome, Italy.
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9
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Dual Role of p73 in Cancer Microenvironment and DNA Damage Response. Cells 2021; 10:cells10123516. [PMID: 34944027 PMCID: PMC8700694 DOI: 10.3390/cells10123516] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2021] [Revised: 11/26/2021] [Accepted: 12/03/2021] [Indexed: 12/12/2022] Open
Abstract
Understanding the mechanisms that regulate cancer progression is pivotal for the development of new therapies. Although p53 is mutated in half of human cancers, its family member p73 is not. At the same time, isoforms of p73 are often overexpressed in cancers and p73 can overtake many p53 functions to kill abnormal cells. According to the latest studies, while p73 represses epithelial–mesenchymal transition and metastasis, it can also promote tumour growth by modulating crosstalk between cancer and immune cells in the tumor microenvironment, M2 macrophage polarisation, Th2 T-cell differentiation, and angiogenesis. Thus, p73 likely plays a dual role as a tumor suppressor by regulating apoptosis in response to genotoxic stress or as an oncoprotein by promoting the immunosuppressive environment and immune cell differentiation.
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10
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Rossin F, Avitabile E, Catarinella G, Fornetti E, Testa S, Oliverio S, Gargioli C, Cannata S, Latella L, Di Sano F. Reticulon-1C Involvement in Muscle Regeneration. Metabolites 2021; 11:metabo11120855. [PMID: 34940613 PMCID: PMC8708675 DOI: 10.3390/metabo11120855] [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: 09/07/2021] [Revised: 11/25/2021] [Accepted: 12/03/2021] [Indexed: 12/03/2022] Open
Abstract
Skeletal muscle is a very dynamic and plastic tissue, being essential for posture, locomotion and respiratory movement. Muscle atrophy or genetic muscle disorders, such as muscular dystrophies, are characterized by myofiber degeneration and replacement with fibrotic tissue. Recent studies suggest that changes in muscle metabolism such as mitochondrial dysfunction and dysregulation of intracellular Ca2+ homeostasis are implicated in many adverse conditions affecting skeletal muscle. Accumulating evidence also suggests that ER stress may play an important part in the pathogenesis of inflammatory myopathies and genetic muscle disorders. Among the different known proteins regulating ER structure and function, we focused on RTN-1C, a member of the reticulon proteins family localized on the ER membrane. We previously demonstrated that RTN-1C expression modulates cytosolic calcium concentration and ER stress pathway. Moreover, we recently reported a role for the reticulon protein in autophagy regulation. In this study, we found that muscle differentiation process positively correlates with RTN-1C expression and UPR pathway up-regulation during myogenesis. To better characterize the role of the reticulon protein alongside myogenic and muscle regenerative processes, we performed in vivo experiments using either a model of muscle injury or a photogenic model for Duchenne muscular dystrophy. The obtained results revealed RTN-1C up-regulation in mice undergoing active regeneration and localization in the injured myofibers. The presented results strongly suggested that RTN-1C, as a protein involved in key aspects of muscle metabolism, may represent a new target to promote muscle regeneration and repair upon injury.
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Affiliation(s)
- Federica Rossin
- Department of Biology, University of Rome ‘Tor Vergata’, 00133 Rome, Italy; (E.A.); (E.F.); (S.T.); (S.O.); (C.G.); (S.C.); (F.D.S.)
- Correspondence:
| | - Elena Avitabile
- Department of Biology, University of Rome ‘Tor Vergata’, 00133 Rome, Italy; (E.A.); (E.F.); (S.T.); (S.O.); (C.G.); (S.C.); (F.D.S.)
| | - Giorgia Catarinella
- Epigenetics and Regenerative Medicine, IRCCS Fondazione Santa Lucia, 00179 Rome, Italy; (G.C.); (L.L.)
- DAHFMO, Unit of Histology and Medical Embryology, Sapienza University of Rome, 00185 Rome, Italy
| | - Ersilia Fornetti
- Department of Biology, University of Rome ‘Tor Vergata’, 00133 Rome, Italy; (E.A.); (E.F.); (S.T.); (S.O.); (C.G.); (S.C.); (F.D.S.)
| | - Stefano Testa
- Department of Biology, University of Rome ‘Tor Vergata’, 00133 Rome, Italy; (E.A.); (E.F.); (S.T.); (S.O.); (C.G.); (S.C.); (F.D.S.)
| | - Serafina Oliverio
- Department of Biology, University of Rome ‘Tor Vergata’, 00133 Rome, Italy; (E.A.); (E.F.); (S.T.); (S.O.); (C.G.); (S.C.); (F.D.S.)
| | - Cesare Gargioli
- Department of Biology, University of Rome ‘Tor Vergata’, 00133 Rome, Italy; (E.A.); (E.F.); (S.T.); (S.O.); (C.G.); (S.C.); (F.D.S.)
| | - Stefano Cannata
- Department of Biology, University of Rome ‘Tor Vergata’, 00133 Rome, Italy; (E.A.); (E.F.); (S.T.); (S.O.); (C.G.); (S.C.); (F.D.S.)
| | - Lucia Latella
- Epigenetics and Regenerative Medicine, IRCCS Fondazione Santa Lucia, 00179 Rome, Italy; (G.C.); (L.L.)
- Institute of Translational Pharmacology, National Research Council of Italy, 00133 Rome, Italy
| | - Federica Di Sano
- Department of Biology, University of Rome ‘Tor Vergata’, 00133 Rome, Italy; (E.A.); (E.F.); (S.T.); (S.O.); (C.G.); (S.C.); (F.D.S.)
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11
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Pradhan LK, Das SK. The Regulatory Role of Reticulons in Neurodegeneration: Insights Underpinning Therapeutic Potential for Neurodegenerative Diseases. Cell Mol Neurobiol 2021; 41:1157-1174. [PMID: 32504327 DOI: 10.1007/s10571-020-00893-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2020] [Accepted: 05/29/2020] [Indexed: 02/06/2023]
Abstract
In the last few decades, cytoplasmic organellar dysfunction, such as that of the endoplasmic reticulum (ER), has created a new area of research interest towards the development of serious health maladies including neurodegenerative diseases. In this context, the extensively dispersed family of ER-localized proteins, i.e. reticulons (RTNs), is gaining interest because of its regulative control over neural regeneration. As most neurodegenerative diseases are pathologically manifested with the accretion of misfolded proteins with subsequent induction of ER stress, the regulatory role of RTNs in neural dysfunction cannot be ignored. With the limited information available in the literature, delineation of the functional connection between rising consequences of neurodegenerative diseases and RTNs need to be elucidated. In this review, we provide a broad overview on the recently revealed regulatory roles of reticulons in the pathophysiology of several health maladies, with special emphasis on neurodegeneration. Additionally, we have also recapitulated the decisive role of RTN4 in neurite regeneration and highlighted how neurodegeneration and proteinopathies are mechanistically linked with each other through specific RTN paralogues. With the recent findings advocating zebrafish Rtn4b (a mammalian Nogo-A homologue) downregulation following central nervous system (CNS) lesion, RTNs provides new insight into the CNS regeneration. However, there are controversies with respect to the role of Rtn4b in zebrafish CNS regeneration. Given these controversies, the connection between the unique regenerative capabilities of zebrafish CNS by distinct compensatory mechanisms and Rtn4b signalling pathway could shed light on the development of new therapeutic strategies against serious neurodegenerative diseases.
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Affiliation(s)
- Lilesh Kumar Pradhan
- Neurobiology Laboratory, Centre for Biotechnology, Siksha 'O' Anusandhan (Deemed To Be University), Kalinga Nagar, Bhubaneswar, 751003, India
| | - Saroj Kumar Das
- Neurobiology Laboratory, Centre for Biotechnology, School of Pharmaceutical Sciences, Siksha 'O' Anusandhan (Deemed To Be University), Kalinga Nagar, Bhubaneswar, 751003, India.
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12
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Modulation of autophagy by RTN-1C: role in autophagosome biogenesis. Cell Death Dis 2019; 10:868. [PMID: 31740665 PMCID: PMC6861279 DOI: 10.1038/s41419-019-2099-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2019] [Revised: 10/04/2019] [Accepted: 10/14/2019] [Indexed: 12/12/2022]
Abstract
The endoplasmic reticulum (ER) is a key organelle fundamental for the maintenance of cellular homeostasis and to determine the cell’s fate under stress conditions. Among the known proteins that regulate ER structure and function there is Reticulon-1C (RTN-1C), a member of the reticulon family localized primarily on the ER membrane. We previously demonstrated that RTN-1C expression affects ER function and stress condition. ER is an essential site for the regulation of apoptotic pathways and it has also been recently recognized as an important component of autophagic signaling. Based on these evidences, we have investigated the impact of RTN-1C modulation on autophagy induction. Interestingly we found that reticulon overexpression is able to activate autophagic machinery and its silencing results in a significative inhibition of both basal and induced autophagic response. Using different experimental approaches we demonstrated that RTN-1C colocalizes with ATG16L and LC3II on the autophagosomes. Considering the key role of reticulon proteins in the control of ER membrane shaping and homeostasis, our data suggest the participation of RTN-1C in the autophagic vesicle biogenesis at the level of the ER compartment. Our data indicate a new mechanism by which this structural ER protein modulates cellular stress, that is at the basis of different autophagy-related pathologies.
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Commentary: When a histone deacetylase fails, the aortic valve gets stressed into old age. J Thorac Cardiovasc Surg 2018; 158:418-419. [PMID: 30527728 DOI: 10.1016/j.jtcvs.2018.10.114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/22/2018] [Accepted: 10/23/2018] [Indexed: 11/21/2022]
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Fan XX, Hao YY, Guo SW, Zhao XP, Xiang Y, Feng FX, Liang GT, Dong YW. Knockdown of RTN1-C attenuates traumatic neuronal injury through regulating intracellular Ca 2+ homeostasis. Neurochem Int 2018; 121:19-25. [PMID: 30352262 DOI: 10.1016/j.neuint.2018.10.018] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2018] [Revised: 09/28/2018] [Accepted: 10/18/2018] [Indexed: 11/24/2022]
Abstract
Reticulons (RTNs) are a family of membrane-bound proteins that are dominantly localized to the endoplasmic reticulum (ER) membrane. RTN1-C is one member of RTNs abundantly expressed in the brain and has been shown to mediate neuronal injury in cerebral ischemia models. In the present study, we investigated the role of RTN1-C in an in vitro brain trauma model mimicked by traumatic neuronal injury (TNI) in primary cultured cortical neurons. TNI increased the expression of RTN1-C in cortical neurons but had no effect on RTN1-A and RTN1-B. Knockdown of RTN1-C with specific siRNA (Si-RTN1-C) significantly decreased cytotoxicity and apoptosis after TNI. The results of Ca2+ imaging showed that intracellular Ca2+ overload induced by TNI was attenuated by RTN1-C knockdown. Furthermore, the activation of metabotropic glutamate receptor 1 (mGluR1)-induced Ca2+ response was partially prevented by Si-RTN1-C transfection. We also evaluated the role of RTN1-C in store-operated Ca2+ entry (SOCE) in cortical neurons using the ER Ca2+ inducer thapsigargin (Tg). The results showed that knockdown of RTN1-C alleviated the SOCE-mediated Ca2+ influx and decreased the expression of stromal interactive molecule 1 (STIM1). In summary, the present study found that knockdown of RTN1-C protected neurons against TNI via preservation of intracellular Ca2+ homeostasis, which was associated with the inhibition of mGluR1-mediated ER Ca2+ release and suppression of STIM1-related SOCE. Thus, RTN1-C might represent a therapeutic target for traumatic brain injury (TBI) research.
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Affiliation(s)
- Xiao-Xuan Fan
- Neurosurgery Department, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, 710061, Shaanxi, China; Neurosurgery Department, Affiliated Hospital of Shaanxi University of Chinese Medicine, Xianyang, 712000, Shaanxi, China
| | - Yu-Ying Hao
- Neurosurgery Department, Affiliated Hospital of Shaanxi University of Chinese Medicine, Xianyang, 712000, Shaanxi, China
| | - Shi-Wen Guo
- Neurosurgery Department, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, 710061, Shaanxi, China.
| | - Xiao-Ping Zhao
- Neurosurgery Department, Affiliated Hospital of Shaanxi University of Chinese Medicine, Xianyang, 712000, Shaanxi, China
| | - Yi Xiang
- Neurosurgery Department, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, 710061, Shaanxi, China
| | - Fei-Xue Feng
- Medical Inspection Center, Affiliated Hospital of Shaanxi University of Chinese Medicine, Xianyang, 712000, Shaanxi, China
| | - Ge-Ting Liang
- Neurosurgery Department, Affiliated Hospital of Shaanxi University of Chinese Medicine, Xianyang, 712000, Shaanxi, China
| | - Yu-Wei Dong
- Neurosurgery Department, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, 710061, Shaanxi, China
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15
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Encephalitis is mediated by ROP18 of Toxoplasma gondii, a severe pathogen in AIDS patients. Proc Natl Acad Sci U S A 2018; 115:E5344-E5352. [PMID: 29784816 DOI: 10.1073/pnas.1801118115] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The neurotropic parasite Toxoplasma gondii is a globally distributed parasitic protozoan among mammalian hosts, including humans. During the course of infection, the CNS is the most commonly damaged organ among invaded tissues. The polymorphic rhoptry protein 18 (ROP18) is a key serine (Ser)/threonine (Thr) kinase that phosphorylates host proteins to modulate acute virulence. However, the basis of neurotropism and the specific substrates through which ROP18 exerts neuropathogenesis remain unknown. Using mass spectrometry, we performed proteomic analysis of proteins that selectively bind to active ROP18 and identified RTN1-C, an endoplasmic reticulum (ER) protein that is preferentially expressed in the CNS. We demonstrated that ROP18 is associated with the N-terminal portion of RTN1-C and specifically phosphorylates RTN1-C at Ser7/134 and Thr4/8/118. ROP18 phosphorylation of RTN1-C triggers ER stress-mediated apoptosis in neural cells. Remarkably, ROP18 phosphorylation of RTN1-C enhances glucose-regulated protein 78 (GRP78) acetylation by attenuating the activity of histone deacetylase (HDAC), and this event is associated with an increase of neural apoptosis. These results clearly demonstrate that both RTN1-C and HDACs are involved in T. gondii ROP18-mediated pathogenesis of encephalitis during Toxoplasma infection.
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16
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The Reticulum-Associated Protein RTN1A Specifically Identifies Human Dendritic Cells. J Invest Dermatol 2018; 138:1318-1327. [PMID: 29369773 DOI: 10.1016/j.jid.2018.01.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2017] [Revised: 12/22/2017] [Accepted: 01/03/2018] [Indexed: 12/21/2022]
Abstract
RTN1 is an endoplasmic reticulum-associated protein that was initially identified in neuronal tissues. Here we show that the main isoform RTN1A is a marker for dendritic cells. In the skin, HLA-DR+CD1ahighCD207+CD11cweak Langerhans cells were the only cells in the epidermis, and HLA-DR+CD11c+ dendritic cells were the main cells in the dermis, expressing this protein. RTN1A+ dendritic cells were also found in gingiva, trachea, tonsil, thymus, and peripheral blood. During differentiation of MUTZ-3 cells into Langerhans cells, expression of RTN1A mRNA and protein preceded established Langerhans cell markers CD1a and CD207, and RTN1A protein partially co-localized with the endoplasmic reticulum marker protein disulfide isomerase. In line with this observation, we found that RTN1A was expressed by around 80% of Langerhans cell precursors in human embryonic skin. Our findings show that RTN1A is a marker for cells of the dendritic lineage, including Langerhans cells and dermal dendritic cells. This unexpected finding will serve as a starting point for the elucidation of the, until now, elusive functional roles of RTN1A in both the immune and the nervous system.
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17
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Shi Q, Ge Y, He W, Hu X, Yan R. RTN1 and RTN3 protein are differentially associated with senile plaques in Alzheimer's brains. Sci Rep 2017; 7:6145. [PMID: 28733667 PMCID: PMC5522448 DOI: 10.1038/s41598-017-05504-9] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2017] [Accepted: 05/19/2017] [Indexed: 11/09/2022] Open
Abstract
Reticulon proteins (RTNs), consisting of RTN1 to RTN4, were previously shown to interact with BACE1 by negatively modulating its secretase activity. In RTN3-null mice, RTN1 expression was slightly elevated. To understand the in vivo role of RTN1, we generated RTN1-null mice and compared the effects of RTN1 and RTN3 on BACE1 modulation. We show that RTN1 is mostly expressed by neurons and not by glial cells under normal conditions, similar to the expression of RTN3. However, RTN1 is more localized in dendrites and is an excellent marker for dendrites of Purkinje cells, while RTN3 expression is less evident in dendrites. This differential localization also correlates with their associations with amyloid plaques in Alzheimer's brains: RTN3, but not RTN1, is abundantly enriched in dystrophic neurites. RTN3 deficiency causes elevation of BACE1 protein levels, while RTN1 deficiency shows no obvious effects on BACE1 activity due to compensation by RTN3, as RTN1 deficiency causes elevation of RTN3 expression. Hence, expression of RTN1 and RTN3 is tightly regulated in mouse brains. Together, our data show that RTN1 and RTN3 have differential effects on the formation of senile plaques in Alzheimer's brains and that RTN3 has a more prominent role in Alzheimer's pathogenesis.
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Affiliation(s)
- Qi Shi
- Department of Neurosciences, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, 44195, USA
| | - Yingying Ge
- Department of Neurosciences, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, 44195, USA
| | - Wanxia He
- Department of Neurosciences, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, 44195, USA
| | - Xiangyou Hu
- Department of Neurosciences, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, 44195, USA
| | - Riqiang Yan
- Department of Neurosciences, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, 44195, USA.
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18
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Abstract
Three neurodegenerative diseases [Amyotrophic Lateral Sclerosis (ALS), Parkinson's disease (PD) and Alzheimer's disease (AD)] have many characteristics like pathological mechanisms and genes. In this sense some researchers postulate that these diseases share the same alterations and that one alteration in a specific protein triggers one of these diseases. Analyses of gene expression may shed more light on how to discover pathways, pathologic mechanisms associated with the disease, biomarkers and potential therapeutic targets. In this review, we analyze four microarrays related to three neurodegenerative diseases. We will systematically examine seven genes (CHN1, MDH1, PCP4, RTN1, SLC14A1, SNAP25 and VSNL1) that are altered in the three neurodegenerative diseases. A network was built and used to identify pathways, miRNA and drugs associated with ALS, AD and PD using Cytoscape software an interaction network based on the protein interactions of these genes. The most important affected pathway is PI3K-Akt signalling. Thirteen microRNAs (miRNA-19B1, miRNA-107, miRNA-124-1, miRNA-124-2, miRNA-9-2, miRNA-29A, miRNA-9-3, miRNA-328, miRNA-19B2, miRNA-29B2, miRNA-124-3, miRNA-15A and miRNA-9-1) and four drugs (Estradiol, Acetaminophen, Resveratrol and Progesterone) for new possible treatments were identified.
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Affiliation(s)
| | - Marcelo Alarcón
- Department of Clinical Biochemistry and Immunohematology, Faculty of Health Sciences, Universidad de Talca, Talca 3460000, Chile; Interdisciplinary Excellence Research Program on Healthy Aging (PIEI-ES), Universidad de Talca, Talca 3460000, Chile.
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Duncan HF, Smith AJ, Fleming GJP, Partridge NC, Shimizu E, Moran GP, Cooper PR. The Histone-Deacetylase-Inhibitor Suberoylanilide Hydroxamic Acid Promotes Dental Pulp Repair Mechanisms Through Modulation of Matrix Metalloproteinase-13 Activity. J Cell Physiol 2017; 231:798-816. [PMID: 26264761 DOI: 10.1002/jcp.25128] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2015] [Accepted: 08/07/2015] [Indexed: 12/23/2022]
Abstract
Direct application of histone-deacetylase-inhibitors (HDACis) to dental pulp cells (DPCs) induces chromatin changes, promoting gene expression and cellular-reparative events. We have previously demonstrated that HDACis (valproic acid, trichostatin A) increase mineralization in dental papillae-derived cell-lines and primary DPCs by stimulation of dentinogenic gene expression. Here, we investigated novel genes regulated by the HDACi, suberoylanilide hydroxamic acid (SAHA), to identify new pathways contributing to DPC differentiation. SAHA significantly compromised DPC viability only at relatively high concentrations (5 μM); while low concentrations (1 μM) SAHA did not increase apoptosis. HDACi-exposure for 24 h induced mineralization-per-cell dose-dependently after 2 weeks; however, constant 14d SAHA-exposure inhibited mineralization. Microarray analysis (24 h and 14 days) of SAHA exposed cultures highlighted that 764 transcripts showed a significant >2.0-fold change at 24 h, which reduced to 36 genes at 14 days. 59% of genes were down-regulated at 24 h and 36% at 14 days, respectively. Pathway analysis indicated SAHA increased expression of members of the matrix metalloproteinase (MMP) family. Furthermore, SAHA-supplementation increased MMP-13 protein expression (7 d, 14 days) and enzyme activity (48 h, 14 days). Selective MMP-13-inhibition (MMP-13i) dose-dependently accelerated mineralization in both SAHA-treated and non-treated cultures. MMP-13i-supplementation promoted expression of several mineralization-associated markers, however, HDACi-induced cell migration and wound healing were impaired. Data demonstrate that short-term low-dose SAHA-exposure promotes mineralization in DPCs by modulating gene pathways and tissue proteases. MMP-13i further increased mineralization-associated events, but decreased HDACi cell migration indicating a specific role for MMP-13 in pulpal repair processes. Pharmacological inhibition of HDAC and MMP may provide novel insights into pulpal repair processes with significant translational benefit. J. Cell. Physiol. 231: 798-816, 2016. © 2015 Wiley Periodicals, Inc.
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Affiliation(s)
- Henry F Duncan
- Division of Restorative Dentistry and Periodontology, Dublin Dental University Hospital, Trinity College Dublin, Lincoln Place, Dublin 2, Ireland
| | - Anthony J Smith
- Oral Biology, School of Dentistry, University of Birmingham, Birmingham, UK
| | - Garry J P Fleming
- Material Science Unit, Dublin Dental University Hospital, Trinity College Dublin, Ireland
| | - Nicola C Partridge
- Department of Basic Science and Craniofacial Biology, New York University College of Dentistry, New York
| | - Emi Shimizu
- Department of Basic Science and Craniofacial Biology, New York University College of Dentistry, New York
| | - Gary P Moran
- Division of Oral Biosciences, Dublin Dental University Hospital, Trinity College Dublin, Ireland
| | - Paul R Cooper
- Oral Biology, School of Dentistry, University of Birmingham, Birmingham, UK
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Obacz J, Avril T, Le Reste PJ, Urra H, Quillien V, Hetz C, Chevet E. Endoplasmic reticulum proteostasis in glioblastoma—From molecular mechanisms to therapeutic perspectives. Sci Signal 2017; 10:10/470/eaal2323. [DOI: 10.1126/scisignal.aal2323] [Citation(s) in RCA: 79] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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21
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Lemire M, Qu C, Loo LWM, Zaidi SHE, Wang H, Berndt SI, Bézieau S, Brenner H, Campbell PT, Chan AT, Chang-Claude J, Du M, Edlund CK, Gallinger S, Haile RW, Harrison TA, Hoffmeister M, Hopper JL, Hou L, Hsu L, Jacobs EJ, Jenkins MA, Jeon J, Küry S, Li L, Lindor NM, Newcomb PA, Potter JD, Rennert G, Rudolph A, Schoen RE, Schumacher FR, Seminara D, Severi G, Slattery ML, White E, Woods MO, Cotterchio M, Marchand LL, Casey G, Gruber SB, Peters U, Hudson TJ. A genome-wide association study for colorectal cancer identifies a risk locus in 14q23.1. Hum Genet 2015; 134:1249-1262. [PMID: 26404086 PMCID: PMC4687971 DOI: 10.1007/s00439-015-1598-6] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2015] [Accepted: 08/30/2015] [Indexed: 12/16/2022]
Abstract
Over 50 loci associated with colorectal cancer (CRC) have been uncovered by genome-wide association studies (GWAS). Identifying additional loci has the potential to help elucidate aspects of the underlying biological processes leading to better understanding of the pathogenesis of the disease. We re-evaluated a GWAS by excluding controls that have family history of CRC or personal history of colorectal polyps, as we hypothesized that their inclusion reduces power to detect associations. This is supported empirically and through simulations. Two-phase GWAS analysis was performed in a total of 16,517 cases and 14,487 controls. We identified rs17094983, a SNP associated with risk of CRC [p = 2.5 × 10(-10); odds ratio estimated by re-including all controls (OR) = 0.87, 95% confidence interval (CI) 0.83-0.91; minor allele frequency (MAF) = 13%]. Results were replicated in samples of African descent (1894 cases and 4703 controls; p = 0.01; OR = 0.86, 95% CI 0.77-0.97; MAF = 16 %). Gene expression data in 195 colon adenocarcinomas and 59 normal colon tissues from two different studies revealed that this locus has genotypes that are associated with RTN1 (Reticulon 1) expression (p = 0.001), a protein-coding gene involved in survival and proliferation of cancer cells which is highly expressed in normal colon tissues but has significantly reduced expression in tumor cells (p = 1.3 × 10(-8)).
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Affiliation(s)
- Mathieu Lemire
- Ontario Institute for Cancer Research, Toronto, ON M5G 0A3, Canada
| | - Conghui Qu
- Public Health Sciences Division, Fred Hutchinson Cancer Research Center, Seattle, Washington
| | - Lenora W M Loo
- Epidemiology Program, University of Hawaii Cancer Center, Honolulu, Hawaii
| | - Syed H E Zaidi
- Ontario Institute for Cancer Research, Toronto, ON M5G 0A3, Canada
| | - Hansong Wang
- Epidemiology Program, University of Hawaii Cancer Center, Honolulu, Hawaii
| | - Sonja I Berndt
- Occupational and Environmental Epidemiology Branch, National Cancer Institute, Bethesda, MD, USA
| | - Stéphane Bézieau
- Service de Génétique Médicale, CHU Nantes, Nantes, France
- EA 4273, Faculté de médecine, Université de Nantes, Nantes, France
| | - Hermann Brenner
- Division of Clinical Epidemiology and Aging Research, German Cancer Research Center (DKFZ), Heidelberg, Germany
- German Cancer Consortium (DKTK), Heidelberg, Germany
- Division of Preventive Oncology, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | | | - Andrew T Chan
- Division of Gastroenterology, Massachusetts General Hospital, Boston, MA, USA
- Channing Division of Network Medicine, Brigham and Women's Hospital, Boston, MA, USA
| | - Jenny Chang-Claude
- Division of Cancer Epidemiology, Unit of Genetic Epidemiology, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Mengmeng Du
- Public Health Sciences Division, Fred Hutchinson Cancer Research Center, Seattle, Washington
| | - Christopher K Edlund
- USC Norris Comprehensive Cancer Center, Department of Preventive Medicine, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
| | - Steven Gallinger
- Samuel Lunenfeld Research Institute, Toronto, ON M5S 1X5, Canada
- Division of General Surgery, Toronto General Hospital, Toronto, ON M5G 2C4, Canada
| | - Robert W Haile
- Department of Medicine, Division of Oncology, Stanford University, California, USA
| | - Tabitha A Harrison
- Public Health Sciences Division, Fred Hutchinson Cancer Research Center, Seattle, Washington
| | - Michael Hoffmeister
- Division of Clinical Epidemiology and Aging Research, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - John L Hopper
- Centre for Epidemiology and Biostatistics, School of Population and Global Health, The University of Melbourne, Melbourne, Australia
| | - Lifang Hou
- Department of Preventive Medicine and the Robert H. Lurie Comprehensive Cancer Center, Feinberg School of Medicine, Northwestern University, Illinois
| | - Li Hsu
- Public Health Sciences Division, Fred Hutchinson Cancer Research Center, Seattle, Washington
- Department of Biostatistics, University of Washington, Seattle, Washington
| | | | - Mark A Jenkins
- Centre for Epidemiology and Biostatistics, School of Population and Global Health, The University of Melbourne, Melbourne, Australia
| | - Jihyoun Jeon
- Public Health Sciences Division, Fred Hutchinson Cancer Research Center, Seattle, Washington
| | - Sébastien Küry
- Service de Génétique Médicale, CHU Nantes, Nantes, France
| | - Li Li
- Case Comprehensive Cancer Center and Swetland Center for Environmental Health, Case Western Reserve University, Cleveland, Ohio
| | - Noralane M Lindor
- Department of Health Sciences Research, Mayo Clinic, Scottsdale, Arizona
| | - Polly A Newcomb
- Public Health Sciences Division, Fred Hutchinson Cancer Research Center, Seattle, Washington
- Department of Epidemiology, University of Washington School of Public Health, Seattle, Washington
| | - John D Potter
- Public Health Sciences Division, Fred Hutchinson Cancer Research Center, Seattle, Washington
- Department of Epidemiology, University of Washington School of Public Health, Seattle, Washington
- Centre for Public Health Research, Massey University, Wellington, New Zealand
| | - Gad Rennert
- Department of Community Medicine and Epidemiology, Carmel Medical Center, Haifa, Israel
- Clalit Health Services National Cancer Control Center, Haifa, Israel
- Bruce Rappaport Faculty of Medicine, Technion-Israel Institute of Technology, Haifa, Israel
| | - Anja Rudolph
- Division of Cancer Epidemiology, Unit of Genetic Epidemiology, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Robert E Schoen
- Division of Gastroenterology, Hepatology, and Nutrition, University of Pittsburgh Medical Center, Pittsburgh, PA, USA
| | - Fredrick R Schumacher
- USC Norris Comprehensive Cancer Center, Department of Preventive Medicine, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
| | - Daniela Seminara
- Division of Cancer Control and Population Sciences, National Cancer Institute, Bethesda, MD, USA
| | - Gianluca Severi
- Centre for Epidemiology and Biostatistics, School of Population and Global Health, The University of Melbourne, Melbourne, Australia
- Cancer Epidemiology Centre, Cancer Council Victoria, Melbourne, Australia
- Human Genetics Foundation (HuGeF), Torino, Italy
| | - Martha L Slattery
- Department of Internal Medicine, University of Utah Health Sciences Center, Salt Lake City, UT, USA
| | - Emily White
- Public Health Sciences Division, Fred Hutchinson Cancer Research Center, Seattle, Washington
- Department of Epidemiology, University of Washington School of Public Health, Seattle, Washington
| | - Michael O Woods
- Discipline of Genetics, Memorial University of Newfoundland, St. John's, NF A1B 3V6, Canada
| | | | - Loic Le Marchand
- Epidemiology Program, University of Hawaii Cancer Center, Honolulu, Hawaii
| | - Graham Casey
- USC Norris Comprehensive Cancer Center, Department of Preventive Medicine, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
| | - Steven B Gruber
- USC Norris Comprehensive Cancer Center, Department of Preventive Medicine, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
- USC Norris Comprehensive Cancer Center, Department of Medicine, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
| | - Ulrike Peters
- Public Health Sciences Division, Fred Hutchinson Cancer Research Center, Seattle, Washington
- School of Public Health, University of Washington, Seattle, Washington
| | - Thomas J Hudson
- Ontario Institute for Cancer Research, Toronto, ON M5G 0A3, Canada
- Department of Medical Biophysics, University of Toronto, Toronto, ON M5S 1A1, Canada
- Department of Molecular Genetics, University of Toronto, Toronto, ON M5S 1A1, Canada
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Aberrantly Expressed OTX Homeobox Genes Deregulate B-Cell Differentiation in Hodgkin Lymphoma. PLoS One 2015; 10:e0138416. [PMID: 26406991 PMCID: PMC4583255 DOI: 10.1371/journal.pone.0138416] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2015] [Accepted: 08/29/2015] [Indexed: 12/20/2022] Open
Abstract
In Hodgkin lymphoma (HL) we recently reported that deregulated homeobox gene MSX1 mediates repression of the B-cell specific transcription factor ZHX2. In this study we investigated regulation of MSX1 in this B-cell malignancy. Accordingly, we analyzed expression and function of OTX homeobox genes which activate MSX1 transcription during embryonal development in the neural plate border region. Our data demonstrate that OTX1 and OTX2 are aberrantly expressed in both HL patients and cell lines. Moreover, both OTX loci are targeted by genomic gains in overexpressing cell lines. Comparative expression profiling and subsequent pathway modulations in HL cell lines indicated that aberrantly enhanced FGF2-signalling activates the expression of OTX2. Downstream analyses of OTX2 demonstrated transcriptional activation of genes encoding transcription factors MSX1, FOXC1 and ZHX1. Interestingly, examination of the physiological expression profile of ZHX1 in normal hematopoietic cells revealed elevated levels in T-cells and reduced expression in B-cells, indicating a discriminatory role in lymphopoiesis. Furthermore, two OTX-negative HL cell lines overexpressed ZHX1 in correlation with genomic amplification of its locus at chromosomal band 8q24, supporting the oncogenic potential of this gene in HL. Taken together, our data demonstrate that deregulated homeobox genes MSX1 and OTX2 respectively impact transcriptional inhibition of (B-cell specific) ZHX2 and activation of (T-cell specific) ZHX1. Thus, we show how reactivation of a specific embryonal gene regulatory network promotes disturbed B-cell differentiation in HL.
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Fan Y, Xiao W, Li Z, Li X, Chuang PY, Jim B, Zhang W, Wei C, Wang N, Jia W, Xiong H, Lee K, He JC. RTN1 mediates progression of kidney disease by inducing ER stress. Nat Commun 2015; 6:7841. [PMID: 26227493 PMCID: PMC4532799 DOI: 10.1038/ncomms8841] [Citation(s) in RCA: 68] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2015] [Accepted: 06/17/2015] [Indexed: 12/11/2022] Open
Abstract
Identification of new biomarkers and drug targets for chronic kidney disease (CKD) is required for the development of more effective therapy. Here we report an association between expression of reticulon 1 (RTN1) and severity of CKD. An isoform-specific increase in the expression of RTN1A is detected in the diseased kidneys from mice and humans, and correlates inversely with renal function in patients with diabetic nephropathy. RTN1 overexpression in renal cells induces ER stress and apoptosis, whereas RTN1 knockdown attenuates tunicamycin-induced and hyperglycaemia-induced ER stress and apoptosis. RTN1A interacts with PERK through its N-terminal and C-terminal domains, and mutation of these domains prevents this effect on ER stress. Knockdown of Rtn1a expression in vivo attenuates ER stress and renal fibrosis in mice with unilateral ureteral obstruction, and also attenuates ER stress, proteinuria, glomerular hypertrophy and mesangial expansion in diabetic mice. Together, these data indicate that RTN1A contributes to progression of kidney disease by inducing ER stress. ER stress is associated with the pathogenesis of chronic kidney disease (CKD) and new CKD therapies are needed. Here the authors show that expression of Rtn1 can control severity of renal disease and that inhibition of its expression can attenuate ER stress and CKD.
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Affiliation(s)
- Ying Fan
- Division of Nephrology, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York 10029, USA.,Department of Nephrology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai 200233, China
| | - Wenzhen Xiao
- Division of Nephrology, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York 10029, USA.,Department of Nephrology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai 200233, China
| | - Zhengzhe Li
- Division of Nephrology, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York 10029, USA
| | - Xuezhu Li
- Division of Nephrology, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York 10029, USA
| | - Peter Y Chuang
- Division of Nephrology, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York 10029, USA
| | - Belinda Jim
- Division of Nephrology, Department of Medicine, Jacobi Medical Center, Albert Einstein College of Medicine, Bronx, New York 10461, USA
| | - Weijia Zhang
- Division of Nephrology, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York 10029, USA
| | - Chengguo Wei
- Division of Nephrology, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York 10029, USA
| | - Niansong Wang
- Department of Nephrology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai 200233, China
| | - Weiping Jia
- Department of Nephrology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai 200233, China
| | - Huabao Xiong
- Immunology Institute, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, 10029, USA
| | - Kyung Lee
- Division of Nephrology, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York 10029, USA
| | - John C He
- Division of Nephrology, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York 10029, USA
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Stress signaling in mammalian oocytes and embryos: a basis for intervention and improvement of outcomes. Cell Tissue Res 2015; 363:159-167. [PMID: 25743689 DOI: 10.1007/s00441-015-2124-9] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2014] [Accepted: 12/30/2014] [Indexed: 10/23/2022]
Abstract
Oocytes and early stage embryos are highly sensitive to variation in diverse exogenous factors such as temperature, osmolarity, oxygen, nutrient restriction, pH, shear stress, toxins, amino acid availability, and lipids. It is becoming increasingly apparent that many such factors negatively affect the endoplasmic reticulum, protein synthesis and protein processing, initiating ER stress and unfolded protein responses. As a result, ER stress signaling serves as a common mediator of cellular responses to diverse stressors. In oocytes and embryos, this leads to developmental arrest and epigenetic changes. Recent studies have revealed that preventing ER stress or inhibiting ER stress signaling can preserve or even enhance oocyte and embryo developmental potential. This review examines ER stress signaling, how it arises, how it affects oocytes and embryos, and how its occurrence can be managed or prevented.
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25
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Endoplasmic reticulum stress signaling in mammalian oocytes and embryos: life in balance. INTERNATIONAL REVIEW OF CELL AND MOLECULAR BIOLOGY 2015; 316:227-65. [PMID: 25805126 DOI: 10.1016/bs.ircmb.2015.01.005] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Mammalian oocytes and embryos are exquisitely sensitive to a wide range of insults related to physical stress, chemical exposure, and exposures to adverse maternal nutrition or health status. Although cells manifest specific responses to various stressors, many of these stressors intersect at the endoplasmic reticulum (ER), where disruptions in protein folding and production of reactive oxygen species initiate downstream signaling events. These signals modulate mRNA translation and gene transcription, leading to recovery, activation of autophagy, or with severe and prolonged stress, apoptosis. ER stress signaling has recently come to the fore as a major contributor to embryo demise. Accordingly, agents that modulate or inhibit ER stress signaling have yielded beneficial effects on embryo survival and long-term developmental potential. We review here the mechanisms of ER stress signaling, their connections to mammalian oocytes and embryos, and the promising indications that interventions in this pathway may provide new opportunities for improving mammalian reproduction and health.
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Chen L, Wan L, Du J, Shen Y. Identification of MANF as a protein interacting with RTN1-C. Acta Biochim Biophys Sin (Shanghai) 2015; 47:91-7. [PMID: 25543119 DOI: 10.1093/abbs/gmu125] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
Reticulons (RTNs) constitute a family of endoplasmic reticulum (ER)-associated proteins with a reticular distribution. Recently, evidence has shown that they exert a cancer-specific proapoptotic function via interaction or modulation of specific proteins. Such evidence is particularly associated with the RTN1-C family members. In order to explore proteins that interact with RTN1-C, the yeast two-hybrid system and regular molecular biological techniques were used to screen the human fetal brain cDNA library. As a result, seven RTN1-C interacting proteins including Homo sapiens mesencephalic astrocyte-derived neurotrophic factor (MANF) were obtained. The interactions between RTN1-C and its interacting proteins were confirmed by β-galactosidase assay and growth test in selective media. Moreover, the MANF/RTN1-C interaction was verified in vitro by glutathione S-transferase pull-down assay and in vivo by immunoprecipitation assay. By immunofluorescence assay, it was found that MANF co-localized with RTN1-C in the ER. Knockdown of RTN1-C reduced the localization of MANF in the ER. These results provide clues to further explore the function of RTN1-C and MANF in neurodegenerative diseases and cancer.
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Affiliation(s)
- Lijian Chen
- School of Pharmacy, Anhui Medical University, Hefei 230032, China Department of Anaesthesiology of the First Affiliated Hospital, Anhui Medical University, Hefei 230032, China
| | - Lijuan Wan
- School of Basic Medical Sciences, Anhui Medical University, Hefei 230032, China
| | - Jian Du
- School of Basic Medical Sciences, Anhui Medical University, Hefei 230032, China
| | - Yuxian Shen
- School of Pharmacy, Anhui Medical University, Hefei 230032, China School of Basic Medical Sciences, Anhui Medical University, Hefei 230032, China
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27
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Jiang Y, Li Z, Liu Y, Liu X, Chang Q, Liao Y, Pan R. Neuroprotective effect of water extract of Panax ginseng on corticosterone-induced apoptosis in PC12 cells and its underlying molecule mechanisms. JOURNAL OF ETHNOPHARMACOLOGY 2015; 159:102-112. [PMID: 25446601 DOI: 10.1016/j.jep.2014.10.062] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2014] [Revised: 10/28/2014] [Accepted: 10/29/2014] [Indexed: 06/04/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE The root of Panax ginseng C.A. Meyer (Family Araliaceae) is an important medicinal plant which has been employed as a panacea for more than 2,000 years in China. It has the actions of invigorating primordial qi, recovering pulse and desertion, engendering liquid, and calming spirit. The water extract of Panax ginseng (WEG) has been used to treat kinds of central nervous system disorders, such as depression, insomnia, Alzheimer׳s disease and Parkinson׳s disease. Our previous work has demonstrated that WEG possessed antidepressant-like activities in both acute and chronic stress models of depression. Nevertheless, there are no studies on the cytoprotection and potential mechanisms of WEG on corticosterone-induced apoptosis. The present study focuses on cytoprotection against corticosterone-induced neurotoxicity in PC12 cells and its underlying molecule mechanisms of the antidepressant-like effect of WEG. MATERIALS AND METHODS The PC12 cells were treated with 250 μmol/L corticosterone in the absence or presence of WEG for 24h, then 3-(4,5-dimethy thiazol-2-yl)-2,5-diphenyl tetrazolium bromide (MTT) assay, lactate dehydrogenase (LDH) detection, Hoechst33342 staining and TUNEL staining were investigated to confirm the neuroprotection of WEG. Then, mitochondrial permeability transition pore (mPTP), mitochondrial membrane potential (MMP), intracellular Ca(2+) ([Ca(2+)]i), reactive oxygen species (ROS) concentration, and the expression level of glucocorticoid receptor (GR), heat shock protein 90 (Hsp90), histone deactylase 6 (HDAC6), glucose-regulated protein 78 (GRP78), growth arrest and DNA damage inducible protein 153 (GADD153), X-box DNA-binding protein-1 (XBP-1), caspase-12, cytochrome C, inhibitor of caspase-activated deoxyribonuclease (ICAD), caspase-3 and caspase-9 were assessed by Western Blot analysis to understand the molecule mechanisms of neuroprotection of WEG. RESULTS WEG partly reversed corticosterone-induced damage in PC12 cells, which increased cell viability, decreased LDH release, and attenuated corticosterone-induced apoptosis as compared with the corticosterone-treated group. Mechanistically, compared with the corticosterone-treated group, WEG strongly attenuated [Ca(2+)]i overload and ROS level, and restored mitochondrial function, including mPTP and MMP. Furthermore, WEG strongly up-regulated the expression of GR and HDAC6, and down-regulated the expression of Hsp90, cytochrome C, ICAD, caspase-3, caspase-9 as well as endoplasmic reticulum (ER) stress-related proteins, such as GADD153, GRP78, XBP-1, and caspase-12. CONCLUSION WEG possessed neuroprotection against corticosterone-induced damage in PC12 cells, and the underlying molecule mechanisms was depended on the intervening of HDAC6 and HSP90 of the GR-related function proteins, and subsequent restoration of ER and mitochondria functions.
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Affiliation(s)
- Yumao Jiang
- Institute of Medicinal Plant Development, Chinese Academy of Medical Science, Peking Union Medical College, Beijing 100193, China
| | - Zongyang Li
- Institute of Medicinal Plant Development, Chinese Academy of Medical Science, Peking Union Medical College, Beijing 100193, China
| | - Yamin Liu
- Institute of Medicinal Plant Development, Chinese Academy of Medical Science, Peking Union Medical College, Beijing 100193, China
| | - Xinmin Liu
- Institute of Medicinal Plant Development, Chinese Academy of Medical Science, Peking Union Medical College, Beijing 100193, China
| | - Qi Chang
- Institute of Medicinal Plant Development, Chinese Academy of Medical Science, Peking Union Medical College, Beijing 100193, China
| | - Yonghong Liao
- Institute of Medicinal Plant Development, Chinese Academy of Medical Science, Peking Union Medical College, Beijing 100193, China
| | - Ruile Pan
- Institute of Medicinal Plant Development, Chinese Academy of Medical Science, Peking Union Medical College, Beijing 100193, China.
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28
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A novel centrosome and microtubules associated subcellular localization of Nogo-A: implications for neuronal development. Int J Biochem Cell Biol 2014; 57:1-6. [PMID: 25286302 DOI: 10.1016/j.biocel.2014.09.024] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2014] [Revised: 08/07/2014] [Accepted: 09/25/2014] [Indexed: 11/21/2022]
Abstract
Oligodendrocyte-derived neurite-outgrowth inhibitor Nogo-A and its restriction mechanism are well-known. Recently, Nogo-A is reported to be abundantly expressed in neurons, however, the concrete link between neuronal Nogo-A and neuronal development is poorly understood. In the present study, we used Neuro2A and COS7 cell lines to clarify that Nogo-A largely distributed in the centrosome and microtubules-rich regions. When endogenous Nogo-A was down-regulated with RNA interference, the percentage of cell differentiation and the total neurite length of Neuro2A exposed to valproic acid (VPA) decreased sharply. Furthermore, in primary neurons, acetylated α-tubulin decreased at the tips of neurites where endogenous Nogo-A was still highly expressed. In HEK293FT cell lines, Nogo-A overexpression could redistribute acetylated α-tubulin but not change the level of α-tubulin. Together, our data discovered that centrosome- and microtubules-localized Nogo-A positively regulates neuronal differentiation and neurite outgrowth of Neuro2A cell lines, implicating the essential roles of subcellular Nogo-A in neuronal development.
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29
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Chiurchiù V, Maccarrone M, Orlacchio A. The role of reticulons in neurodegenerative diseases. Neuromolecular Med 2013; 16:3-15. [PMID: 24218324 PMCID: PMC3918113 DOI: 10.1007/s12017-013-8271-9] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2013] [Accepted: 10/23/2013] [Indexed: 01/08/2023]
Abstract
Reticulons (RTNs) are a group of membrane-associated proteins mainly responsible for shaping the tubular endoplasmic reticulum network, membrane trafficking, inhibition of axonal growth, and apoptosis. These proteins share a common sequence feature, the reticulon homology domain, which consists of paired hydrophobic stretches that are believed to induce membrane curvature by acting as a wedge in bilayer membranes. RTNs are ubiquitously expressed in all tissues, but each RTN member exhibits a unique expression pattern that prefers certain tissues or even cell types. Recently, accumulated evidence has suggested additional and unexpected roles for RTNs, including those on DNA binding, autophagy, and several inflammatory-related functions. These manifold actions of RTNs account for their ever-growing recognition of their involvement in neurodegenerative diseases like Alzheimer's disease, amyotrophic lateral sclerosis, multiple sclerosis, as well as hereditary spastic paraplegia. This review summarizes the latest discoveries on RTNs in human pathophysiology, and the engagement of these in neurodegeneration, along with the implications of these findings for a better understanding of the molecular events triggered by RTNs and their potential exploitation as next-generation therapeutics.
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Affiliation(s)
- Valerio Chiurchiù
- Laboratorio di Neurochimica dei Lipidi, Centro Europeo di Ricerca sul Cervello (CERC) - Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS) Santa Lucia, Rome, Italy
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30
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Bernardoni P, Fazi B, Costanzi A, Nardacci R, Montagna C, Filomeni G, Ciriolo MR, Piacentini M, Di Sano F. Reticulon1-C modulates protein disulphide isomerase function. Cell Death Dis 2013; 4:e581. [PMID: 23559015 PMCID: PMC3641336 DOI: 10.1038/cddis.2013.113] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Endoplasmic reticulum (ER) is the primary site for the synthesis and folding of secreted and membrane-bound proteins. Accumulation of unfolded and misfolded proteins in ER underlies a wide range of human neurodegenerative disorders. Hence, molecules regulating the ER stress response represent potential candidates as drug targets for tackling these diseases. Protein disulphide isomerase (PDI) is a chaperone involved in ER stress pathway, its activity being an important cellular defense against protein misfolding. Here, we demonstrate that human neuroblastoma SH-SY5Y cells overexpressing the reticulon protein 1-C (RTN1-C) reticulon family member show a PDI punctuate subcellular distribution identified as ER vesicles. This represents an event associated with a significant increase of PDI enzymatic activity. We provide evidence that the modulation of PDI localization and activity does not only rely upon ER stress induction or upregulation of its synthesis, but tightly correlates to an alteration in its nitrosylation status. By using different RTN1-C mutants, we demonstrate that the observed effects depend on RTN1-C N-terminal region and on the integrity of the microtubule network. Overall, our results indicate that RTN1-C induces PDI redistribution in ER vesicles, and concomitantly modulates its activity by decreasing the levels of its S-nitrosylated form. Thus RTN1-C represents a promising candidate to modulate PDI function.
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Affiliation(s)
- P Bernardoni
- Department of Biology, University of Rome, Tor Vergata, Via della Ricerca Scientifica, 00133 Rome, Italy
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31
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Bhandary B, Marahatta A, Kim HR, Chae HJ. An involvement of oxidative stress in endoplasmic reticulum stress and its associated diseases. Int J Mol Sci 2012; 14:434-56. [PMID: 23263672 PMCID: PMC3565273 DOI: 10.3390/ijms14010434] [Citation(s) in RCA: 287] [Impact Index Per Article: 23.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2012] [Revised: 12/01/2012] [Accepted: 12/13/2012] [Indexed: 12/17/2022] Open
Abstract
The endoplasmic reticulum (ER) is the major site of calcium storage and protein folding. It has a unique oxidizing-folding environment due to the predominant disulfide bond formation during the process of protein folding. Alterations in the oxidative environment of the ER and also intra-ER Ca2+ cause the production of ER stress-induced reactive oxygen species (ROS). Protein disulfide isomerases, endoplasmic reticulum oxidoreductin-1, reduced glutathione and mitochondrial electron transport chain proteins also play crucial roles in ER stress-induced production of ROS. In this article, we discuss ER stress-associated ROS and related diseases, and the current understanding of the signaling transduction involved in ER stress.
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Affiliation(s)
- Bidur Bhandary
- Department of Pharmacology, School of Medicine, Chonbuk National Univeristy, Jeonju 561-180, South Korea; E-Mails: (B.B.); (A.M.)
| | - Anu Marahatta
- Department of Pharmacology, School of Medicine, Chonbuk National Univeristy, Jeonju 561-180, South Korea; E-Mails: (B.B.); (A.M.)
| | - Hyung-Ryong Kim
- Department of Dental Pharmacology, Dental School, Wonkwang University, Iksan 570-749, South Korea
- Authors to whom correspondence should be addressed; E-Mails: (H.-R.K.); (H.-J.C.); Tel.: +82-63-850-6640 (H.-R.K.); +82-63-270-3092 (H.-J.C.); Fax: +82-63-854-0285 (H.-R.K.); +82-63-275-8799 (H.-J.C.)
| | - Han-Jung Chae
- Department of Pharmacology, School of Medicine, Chonbuk National Univeristy, Jeonju 561-180, South Korea; E-Mails: (B.B.); (A.M.)
- Authors to whom correspondence should be addressed; E-Mails: (H.-R.K.); (H.-J.C.); Tel.: +82-63-850-6640 (H.-R.K.); +82-63-270-3092 (H.-J.C.); Fax: +82-63-854-0285 (H.-R.K.); +82-63-275-8799 (H.-J.C.)
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Di Sano F, Piacentini M. Reticulon Protein-1C: A New Hope in the Treatment of Different Neuronal Diseases. Int J Cell Biol 2012; 2012:651805. [PMID: 22693512 PMCID: PMC3368183 DOI: 10.1155/2012/651805] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2012] [Accepted: 03/18/2012] [Indexed: 12/15/2022] Open
Abstract
Reticulons (RTNs) are a group of membrane proteins localized on the ER and known to regulate ER structure and functions. Several studies have suggested that RTNs are involved in different important cellular functions such as changes in calcium homeostasis, ER-stress-mediated cell death, and autophagy. RTNs have been demonstrated to exert a cancer specific proapoptotic function via the interaction or the modulation of specific proteins. Reticulons have also been implicated in different signaling pathways which are at the basis of the pathogenesis of several neurodegenerative diseases. In this paper we discuss the accumulating evidence identifying RTN-1C protein as a promising target in the treatment of different pathologies such as cancer or neurodegenerative disorders.
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Affiliation(s)
- Federica Di Sano
- Department of Biology, University of Rome “Tor Vergata”, Via della Ricerca Scientifica, 00133 Rome, Italy
| | - Mauro Piacentini
- Department of Biology, University of Rome “Tor Vergata”, Via della Ricerca Scientifica, 00133 Rome, Italy
- National Institute for Infectious Diseases IRCCS “L. Spallanzani”, Via Portuense, 00149 Rome, Italy
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Nepravishta R, Polizio F, Paci M, Melino S. A metal-binding site in the RTN1-C protein: new perspectives on the physiological role of a neuronal protein. Metallomics 2012; 4:480-7. [PMID: 22522967 DOI: 10.1039/c2mt20035j] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Reticulon 1-C (RTN1-C) is an ER-associated neuronal protein characterized by horse-shoe-like topology with two transmembrane helices and the N- and C-terminal regions which are supposed in the cytosolic side of ER. The physiological role of this protein is not completely clarified, but several studies have suggested its involvement in the neuronal differentiation, membrane vesicle trafficking and induction of apoptosis. The C-terminal region of RTN1-C is characterized by the presence of a H4 histone consensus sequence that makes it able to interact with nucleic acids and HDAC enzymes both in vitro and in vivo. In the present study a potential metal ion binding motif (HxE/D) at the C-terminal of the RTN1-C has been identified and its capability to bind metals investigated by UV-vis, CD, multidimensional NMR spectroscopy and biological assays. The results suggest a possible implication of the metal ions in the mechanisms of formation of the recently observed RTNs multiprotein complexes contributing to understand the structure and function of this neuronal membrane protein, suggesting a possible effect of the metal binding property on its biological function.
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Affiliation(s)
- Ridvan Nepravishta
- Department of Sciences and Chemical Technologies, University of Rome Tor Vergata, via della Ricerca Scientifica, 00133 Rome, Italy
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Di Sano F, Bernardoni P, Piacentini M. The reticulons: guardians of the structure and function of the endoplasmic reticulum. Exp Cell Res 2012; 318:1201-7. [PMID: 22425683 DOI: 10.1016/j.yexcr.2012.03.002] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2011] [Revised: 03/01/2012] [Accepted: 03/02/2012] [Indexed: 12/22/2022]
Abstract
The endoplasmic reticulum (ER) consists of the nuclear envelope and a peripheral network of tubules and membrane sheets. The tubules are shaped by a specific class of curvature stabilizing proteins, the reticulons and DP1; however it is still unclear how the sheets are assembled. The ER is the cellular compartment responsible for secretory and membrane protein synthesis. The reducing conditions of ER lead to the intra/inter-chain formation of new disulphide bonds into polypeptides during protein folding assessed by enzymatic or spontaneous reactions. Moreover, ER represents the main intracellular calcium storage site and it plays an important role in calcium signaling that impacts many cellular processes. Accordingly, the maintenance of ER function represents an essential condition for the cell, and ER morphology constitutes an important prerogative of it. Furthermore, it is well known that ER undergoes prominent shape transitions during events such as cell division and differentiation. Thus, maintaining the correct ER structure is an essential feature for cellular physiology. Now, it is known that proper ER-associated proteins play a fundamental role in ER tubules formation. Among these ER-shaping proteins are the reticulons (RTN), which are acquiring a relevant position. In fact, beyond the structural role of reticulons, in very recent years new and deeper functional implications of these proteins are emerging in relation to their involvement in several cellular processes.
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Affiliation(s)
- Federica Di Sano
- Department of Biology, University of Rome Tor Vergata, Rome, Italy
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Tang Y, Xiang W, Terry L, Kretzschmar HA, Windl O. Transcriptional analysis implicates endoplasmic reticulum stress in bovine spongiform encephalopathy. PLoS One 2010; 5:e14207. [PMID: 21151970 PMCID: PMC2997050 DOI: 10.1371/journal.pone.0014207] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2010] [Accepted: 11/01/2010] [Indexed: 11/18/2022] Open
Abstract
Bovine spongiform encephalopathy (BSE) is a fatal, transmissible, neurodegenerative disease of cattle. To date, the disease process is still poorly understood. In this study, brain tissue samples from animals naturally infected with BSE were analysed to identify differentially regulated genes using Affymetrix GeneChip Bovine Genome Arrays. A total of 230 genes were shown to be differentially regulated and many of these genes encode proteins involved in immune response, apoptosis, cell adhesion, stress response and transcription. Seventeen genes are associated with the endoplasmic reticulum (ER) and 10 of these 17 genes are involved in stress related responses including ER chaperones, Grp94 and Grp170. Western blotting analysis showed that another ER chaperone, Grp78, was up-regulated in BSE. Up-regulation of these three chaperones strongly suggests the presence of ER stress and the activation of the unfolded protein response (UPR) in BSE. The occurrence of ER stress was also supported by changes in gene expression for cytosolic proteins, such as the chaperone pair of Hsp70 and DnaJ. Many genes associated with the ubiquitin-proteasome pathway and the autophagy-lysosome system were differentially regulated, indicating that both pathways might be activated in response to ER stress. A model is presented to explain the mechanisms of prion neurotoxicity using these ER stress related responses. Clustering analysis showed that the differently regulated genes found from the naturally infected BSE cases could be used to predict the infectious status of the samples experimentally infected with BSE from the previous study and vice versa. Proof-of-principle gene expression biomarkers were found to represent BSE using 10 genes with 94% sensitivity and 87% specificity.
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Affiliation(s)
- Yue Tang
- Department of Molecular Pathogenesis and Genetics, Veterinary Laboratories Agency, Surrey, United Kingdom
- * E-mail: (YT); (OW)
| | - Wei Xiang
- Institute of Biochemistry, Emil-Fischer-Center, University Erlangen-Nuernberg, Erlangen, Germany
| | - Linda Terry
- Department of Molecular Pathogenesis and Genetics, Veterinary Laboratories Agency, Surrey, United Kingdom
| | - Hans A. Kretzschmar
- Institute of Neuropathology, Ludwig-Maximilians-University Munich, Munich, Germany
| | - Otto Windl
- Department of Molecular Pathogenesis and Genetics, Veterinary Laboratories Agency, Surrey, United Kingdom
- * E-mail: (YT); (OW)
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Llorens F, Gil V, del Río JA. Emerging functions of myelin-associated proteins during development, neuronal plasticity, and neurodegeneration. FASEB J 2010; 25:463-75. [PMID: 21059749 DOI: 10.1096/fj.10-162792] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Adult mammalian central nervous system (CNS) axons have a limited regrowth capacity following injury. Myelin-associated inhibitors (MAIs) limit axonal outgrowth, and their blockage improves the regeneration of damaged fiber tracts. Three of these proteins, Nogo-A, MAG, and OMgp, share two common neuronal receptors: NgR1, together with its coreceptors [p75(NTR), TROY, and Lingo-1]; and the recently described paired immunoglobulin-like receptor B (PirB). These proteins impair neuronal regeneration by limiting axonal sprouting. Some of the elements involved in the myelin inhibitory pathways may still be unknown, but the discovery that blocking both PirB and NgR1 activities leads to near-complete release from myelin inhibition, sheds light on one of the most competitive and intense fields of neuroregeneration study in recent decades. In parallel with the identification and characterization of the roles and functions of these inhibitory molecules in axonal regeneration, data gathered in the field strongly suggest that most of these proteins have roles other than axonal growth inhibition. The discovery of a new group of interacting partners for myelin-associated receptors and ligands, as well as functional studies within or outside the CNS environment, highlights the potential new physiological roles for these proteins in processes, such as development, neuronal homeostasis, plasticity, and neurodegeneration.
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Affiliation(s)
- Franc Llorens
- Molecular and Cellular Neurobiotechnology, Institute for Bioengineering of Catalonia, and Department of Cell Biology, University of Barcelona, Barcelona, Spain
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Astolfi A, Nannini M, Pantaleo MA, Di Battista M, Heinrich MC, Santini D, Catena F, Corless CL, Maleddu A, Saponara M, Lolli C, Di Scioscio V, Formica S, Biasco G. A molecular portrait of gastrointestinal stromal tumors: an integrative analysis of gene expression profiling and high-resolution genomic copy number. J Transl Med 2010; 90:1285-94. [PMID: 20548289 DOI: 10.1038/labinvest.2010.110] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
In addition to KIT and PDGFRA mutations, sequential accumulation of other genetic events is involved in the development and progression of gastrointestinal stromal tumors (GISTs). Until recently, the significance of these other alterations has not been thoroughly investigated. We report the first study that integrates gene expression profiling and high-resolution genomic copy number analyses in GIST. Fresh tissue specimens from 25 patients with GIST were collected, and gene expression profiling and high-resolution genomic copy number analyses were performed, using Affymetrix U133Plus and SNP array 6.0. We found that all 21 mutant GIST patients showed both macroscopic cytogenetic alterations and cryptic microdeletions or amplifications, whereas 75% (three of four) of wild-type patients with GIST did not show genomic imbalances. The most frequently observed chromosomal alterations in patients with mutant GIST included 14q complete or partial deletion (17 of 25), 1p deletion (14 of 25) and 22q deletion (10 of 25). Genetic targets of the chromosomal aberrations were selected by integrated analysis of copy number and gene expression data. We detected the involvement of known oncogenes and tumor suppressors including KRAS in chr 12p amplification and KIF1B, PPM1A, NF2 in chr 1p, 14q and 22p deletions, respectively. The genomic segment most frequently altered in mutated samples was the 14q23.1 region, which contains potentially novel tumor suppressors, including DAAM1, RTN1 and DACT1. siRNA-mediated RTN1 downregulation showed evidence for the potential role in GIST pathogenesis. The combination of gene expression profiling and high-resolution genomic copy number analysis offers a detailed molecular portrait of GISTs, providing an essential comprehensive knowledge necessary to guide the discovery of novel target genes involved in tumor development and progression.
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Affiliation(s)
- Annalisa Astolfi
- Interdepartmental Centre for Cancer Research G. Prodi, University of Bologna, Bologna, Italy
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Characterization of gene expression induced by RTN-1C in human neuroblastoma cells and in mouse brain. Neurobiol Dis 2010; 40:634-44. [PMID: 20708685 DOI: 10.1016/j.nbd.2010.08.007] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2010] [Revised: 08/03/2010] [Accepted: 08/05/2010] [Indexed: 01/13/2023] Open
Abstract
The endoplasmic reticulum (ER) stress-mediated pathway is involved in a wide range of human neurodegenerative disorders. Hence, molecules that regulate the ER stress response represent potential candidates as drug targets to tackle these diseases. In previous studies we demonstrated that upon acetylation the reticulon-1C (RTN-1C) variant of the reticulon family leads to inhibition of histone deacetylase (HDAC) enzymatic activity and endoplasmic reticulum stress-dependent apoptosis. Here, by microarray analysis of the whole human genome we found that RTN-1C is able to specifically regulate gene expression, modulating transcript clusters which have been implicated in the onset of neurodegenerative disorders. Interestingly, we show that some of the identified genes were also modulated in vivo in a brain-specific mouse model overexpressing RTN-1C. These data provide a basis for further investigation of RTN-1C as a potential molecular target for use in therapy and as a specific marker for neurological diseases.
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Nepravishta R, Bellomaria A, Polizio F, Paci M, Melino S. Reticulon RTN1-CCT Peptide: A Potential Nuclease and Inhibitor of Histone Deacetylase Enzymes. Biochemistry 2009; 49:252-8. [DOI: 10.1021/bi9012676] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
| | | | | | | | - Sonia Melino
- Department of Sciences and Chemical Technologies
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