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Xu Q, Xiao Z, Yang Q, Yu T, Deng X, Chen N, Huang Y, Wang L, Guo J, Wang J. Hydrogel-based cardiac repair and regeneration function in the treatment of myocardial infarction. Mater Today Bio 2024; 25:100978. [PMID: 38434571 PMCID: PMC10907859 DOI: 10.1016/j.mtbio.2024.100978] [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: 07/24/2023] [Revised: 12/22/2023] [Accepted: 01/24/2024] [Indexed: 03/05/2024] Open
Abstract
A life-threatening illness that poses a serious threat to human health is myocardial infarction. It may result in a significant number of myocardial cells dying, dilated left ventricles, dysfunctional heart function, and ultimately cardiac failure. Based on the development of emerging biomaterials and the lack of clinical treatment methods and cardiac donors for myocardial infarction, hydrogels with good compatibility have been gradually applied to the treatment of myocardial infarction. Specifically, based on the three processes of pathophysiology of myocardial infarction, we summarized various types of hydrogels designed for myocardial tissue engineering in recent years, including natural hydrogels, intelligent hydrogels, growth factors, stem cells, and microRNA-loaded hydrogels. In addition, we also describe the heart patch and preparation techniques that promote the repair of MI heart function. Although most of these hydrogels are still in the preclinical research stage and lack of clinical trials, they have great potential for further application in the future. It is expected that this review will improve our knowledge of and offer fresh approaches to treating myocardial infarction.
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Affiliation(s)
- Qiaxin Xu
- Department of Pharmacy, The First Affiliated Hospital of Jinan University, Guangzhou, 510630, China
- The Guangzhou Key Laboratory of Basic and Translational Research on Chronic Diseases, Jinan University, Guangzhou, 510630, China
| | - Zeyu Xiao
- The Guangzhou Key Laboratory of Basic and Translational Research on Chronic Diseases, Jinan University, Guangzhou, 510630, China
- The Guangzhou Key Laboratory of Molecular and Functional Imaging for Clinical Translation, Jinan University, Guangzhou, 510630, China
| | - Qianzhi Yang
- Department of Pharmacy, The First Affiliated Hospital of Jinan University, Guangzhou, 510630, China
- The Guangzhou Key Laboratory of Basic and Translational Research on Chronic Diseases, Jinan University, Guangzhou, 510630, China
| | - Tingting Yu
- Department of Pharmacy, The First Affiliated Hospital of Jinan University, Guangzhou, 510630, China
- The Guangzhou Key Laboratory of Basic and Translational Research on Chronic Diseases, Jinan University, Guangzhou, 510630, China
| | - Xiujiao Deng
- Department of Pharmacy, The First Affiliated Hospital of Jinan University, Guangzhou, 510630, China
- The Guangzhou Key Laboratory of Basic and Translational Research on Chronic Diseases, Jinan University, Guangzhou, 510630, China
| | - Nenghua Chen
- Department of Pharmacy, The First Affiliated Hospital of Jinan University, Guangzhou, 510630, China
- The Guangzhou Key Laboratory of Basic and Translational Research on Chronic Diseases, Jinan University, Guangzhou, 510630, China
| | - Yanyu Huang
- Department of Biochemistry and Molecular Medicine, University of California Davis, Sacramento, CA, 95817, USA
| | - Lihong Wang
- The Guangzhou Key Laboratory of Basic and Translational Research on Chronic Diseases, Jinan University, Guangzhou, 510630, China
- Department of Endocrinology, The First Affiliated Hospital of Jinan University, Guangzhou, 510630, China
| | - Jun Guo
- The Guangzhou Key Laboratory of Basic and Translational Research on Chronic Diseases, Jinan University, Guangzhou, 510630, China
- Department of Cardiology, The First Affiliated Hospital of Jinan University, Guangzhou, 510630, China
| | - Jinghao Wang
- Department of Pharmacy, The First Affiliated Hospital of Jinan University, Guangzhou, 510630, China
- The Guangzhou Key Laboratory of Basic and Translational Research on Chronic Diseases, Jinan University, Guangzhou, 510630, China
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Jiao W, Li W, Li T, Feng T, Wu C, Zhao D. Induced pluripotent stem cell-derived extracellular vesicles overexpressing SFPQ protect retinal Müller cells against hypoxia-induced injury. Cell Biol Toxicol 2023; 39:2647-2663. [PMID: 36790503 DOI: 10.1007/s10565-023-09793-x] [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: 05/20/2022] [Accepted: 01/17/2023] [Indexed: 02/16/2023]
Abstract
Splicing factor proline/glutamine-rich (SFPQ) is expressed in induced pluripotent stem cells (iPSCs), which are reported to orchestrate hypoxic injury responses and release extracellular vesicles (EVs). Therefore, this study sought to explore the role of iPSC-derived EVs carrying SFPQ in hypoxia-induced injury to retinal Müller cells. We induced oxygen-glucose deprivation/reoxygenation (OGD/R) in Müller cells. SFPQ was overexpressed or knocked down in iPSCs, from which EVs were extracted. Müller cells were co-cultured with EVs, and the results indicated that SFPQ protein was transferred into retinal Müller cells by iPSC-derived EVs. We identified an interaction of SFPQ with HDAC1 in retinal Müller cells. Specifically, SFPQ recruited HDAC1 to downregulate HIF-2α by regulating its acetylation. The in vitro studies suggested that iPSC-derived EVs, SFPQ or HDAC1 overexpression, or HIF-2α silencing diminished cell injury and apoptosis but elevated proliferation in retinal Müller cells. The in vivo studies indicated that iPSC-derived EVs containing SFPQ curtailed apoptosis of retinal Müller cells, thus alleviating retinal ischemia/reperfusion (I/R) injury of rat model. Taken together, iPSC-derived EVs containing SFPQ upregulated HDAC1 to attenuate OGD/R-induced Müller cell injury via downregulation of HIF-2α.
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Affiliation(s)
- Wenjun Jiao
- Department of Geriatric Endocrinology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, People's Republic of China
| | - Weifang Li
- Department of Geriatric Endocrinology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, People's Republic of China
| | - Tianyi Li
- Department of Geriatric Endocrinology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, People's Republic of China
| | - Tao Feng
- Department of Geriatric Endocrinology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, People's Republic of China
| | - Cong Wu
- Department of Geriatric Endocrinology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, People's Republic of China
| | - Di Zhao
- Department of Endocrinology, the First Affiliated Hospital of Zhengzhou University, No. 1, Jianshe East Road, Zhengzhou, 450052, People's Republic of China.
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Dery KJ, Kojima H, Kageyama S, Kadono K, Hirao H, Cheng B, Zhai Y, Farmer DG, Kaldas FM, Yuan X, Eltzschig HK, Kupiec-Weglinski JW. Alternative splicing of CEACAM1 by hypoxia-inducible factor-1α enhances tolerance to hepatic ischemia in mice and humans. Sci Transl Med 2023; 15:eadf2059. [PMID: 37531413 DOI: 10.1126/scitranslmed.adf2059] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2022] [Accepted: 07/13/2023] [Indexed: 08/04/2023]
Abstract
Although alternative splicing (AS) drives transcriptional responses and cellular adaptation to environmental stresses, its contributions in organ transplantation have not been appreciated. We have shown that carcinoembryonic antigen-related cell adhesion molecule (Ceacam1; CD66a), a transmembrane biliary glycoprotein expressed in epithelial, endothelial, and immune cells, determines donor liver transplant quality. Here, we studied how AS of Ceacam1 affects ischemia-reperfusion injury (IRI) in mouse and human livers. We found that the short cytoplasmic isoform Ceacam1-S increased during early acute and late resolution phases of warm IRI injury in mice. Transfection of Ceacam1-deficient mouse hepatocytes with adenoviral Ceacam1-S mitigated hypoxia-induced loss of cellular adhesion by repressing the Ask1/p-p38 cell death pathway. Nucleic acid-blocking morpholinos, designed to selectively induce Ceacam1-S, protected hepatocyte cultures against temperature-induced stress in vitro. Luciferase and chromatin immunoprecipitation assays identified direct binding of hypoxia-inducible factor-1α (Hif-1α) to the mouse polypyrimidine tract binding protein 1 (Ptbp1) promoter region. Dimethyloxalylglycine protected mouse livers from warm IR stress and hepatocellular damage by inhibiting prolyl hydroxylase domain-containing protein 1 and promoting AS of Ceacam1-S. Last, analysis of 46 human donor liver grafts revealed that CEACAM1-S positively correlated with pretransplant HIF1A expression. This also correlated with better transplant outcomes, including reduced TIMP1, total bilirubin, proinflammatory MCP1, CXCL10 cytokines, immune activation markers IL17A, and incidence of delayed complications from biliary anastomosis. This translational study identified mouse Hif-1α-controlled AS of Ceacam1, through transcriptional regulation of Ptbp1 promoter region, as a functional underpinning of hepatoprotection against IR stress and tissue damage in liver transplantation.
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Affiliation(s)
- Kenneth J Dery
- Division of Liver and Pancreas Transplantation, Dumont-UCLA Transplantation Center, Department of Surgery, David Geffen School of Medicine at UCLA, Los Angeles, CA 90095, USA
| | - Hidenobu Kojima
- Division of Liver and Pancreas Transplantation, Dumont-UCLA Transplantation Center, Department of Surgery, David Geffen School of Medicine at UCLA, Los Angeles, CA 90095, USA
| | - Shoichi Kageyama
- Division of Liver and Pancreas Transplantation, Dumont-UCLA Transplantation Center, Department of Surgery, David Geffen School of Medicine at UCLA, Los Angeles, CA 90095, USA
| | - Kentaro Kadono
- Division of Liver and Pancreas Transplantation, Dumont-UCLA Transplantation Center, Department of Surgery, David Geffen School of Medicine at UCLA, Los Angeles, CA 90095, USA
| | - Hirofumi Hirao
- Division of Liver and Pancreas Transplantation, Dumont-UCLA Transplantation Center, Department of Surgery, David Geffen School of Medicine at UCLA, Los Angeles, CA 90095, USA
| | - Brian Cheng
- Division of Liver and Pancreas Transplantation, Dumont-UCLA Transplantation Center, Department of Surgery, David Geffen School of Medicine at UCLA, Los Angeles, CA 90095, USA
| | - Yuan Zhai
- Division of Liver and Pancreas Transplantation, Dumont-UCLA Transplantation Center, Department of Surgery, David Geffen School of Medicine at UCLA, Los Angeles, CA 90095, USA
| | - Douglas G Farmer
- Division of Liver and Pancreas Transplantation, Dumont-UCLA Transplantation Center, Department of Surgery, David Geffen School of Medicine at UCLA, Los Angeles, CA 90095, USA
| | - Fady M Kaldas
- Division of Liver and Pancreas Transplantation, Dumont-UCLA Transplantation Center, Department of Surgery, David Geffen School of Medicine at UCLA, Los Angeles, CA 90095, USA
| | - Xiaoyi Yuan
- Department of Anesthesiology, McGovern Medical School at UTHealth, Houston, TX 77030, USA
| | - Holger K Eltzschig
- Department of Anesthesiology, McGovern Medical School at UTHealth, Houston, TX 77030, USA
| | - Jerzy W Kupiec-Weglinski
- Division of Liver and Pancreas Transplantation, Dumont-UCLA Transplantation Center, Department of Surgery, David Geffen School of Medicine at UCLA, Los Angeles, CA 90095, USA
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Shi W, Yang J, Chen D, Yin C, Zhang H, Xu X, Pan X, Wang R, Fei L, Li M, Qi L, Bhadauria V, Liu J, Peng YL. The rice blast fungus SR protein 1 regulates alternative splicing with unique mechanisms. PLoS Pathog 2022; 18:e1011036. [PMID: 36480554 PMCID: PMC9767378 DOI: 10.1371/journal.ppat.1011036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2022] [Revised: 12/20/2022] [Accepted: 11/30/2022] [Indexed: 12/13/2022] Open
Abstract
Serine/arginine-rich (SR) proteins are well known as splicing factors in humans, model animals and plants. However, they are largely unknown in regulating pre-mRNA splicing of filamentous fungi. Here we report that the SR protein MoSrp1 enhances and suppresses alternative splicing in a model fungal plant pathogen Magnaporthe oryzae. Deletion of MoSRP1 caused multiple defects, including reduced virulence and thousands of aberrant alternative splicing events in mycelia, most of which were suppressed or enhanced intron splicing. A GUAG consensus bound by MoSrp1 was identified in more than 94% of the intron or/and proximate exons having the aberrant splicing. The dual functions of regulating alternative splicing of MoSrp1 were exemplified in enhancing and suppressing the consensus-mediated efficient splicing of the introns in MoATF1 and MoMTP1, respectively, which both were important for mycelial growth, conidiation, and virulence. Interestingly, MoSrp1 had a conserved sumoylation site that was essential to nuclear localization and enhancing GUAG binding. Further, we showed that MoSrp1 interacted with a splicing factor and two components of the exon-joining complex via its N-terminal RNA recognition domain, which was required to regulate mycelial growth, development and virulence. In contrast, the C-terminus was important only for virulence and stress responses but not for mycelial growth and development. In addition, only orthologues from Pezizomycotina species could completely rescue defects of the deletion mutants. This study reveals that the fungal conserved SR protein Srp1 regulates alternative splicing in a unique manner.
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Affiliation(s)
- Wei Shi
- State Key Laboratory of Agrobiotechnology, China Agricultural University, Beijing, China
- MARA Key Laboratory of Pest Monitoring and Green Management, Department of Plant Pathology, College of Plant Protection, China Agricultural University, Beijing, China
| | - Jun Yang
- MARA Key Laboratory of Pest Monitoring and Green Management, Department of Plant Pathology, College of Plant Protection, China Agricultural University, Beijing, China
- MARA Key Laboratory of Surveillance and Management for Plant Quarantine Pests, Department of Plant Biosecurity, College of Plant Protection, China Agricultural University, Beijing, China
| | - Deng Chen
- State Key Laboratory of Agrobiotechnology, China Agricultural University, Beijing, China
- MARA Key Laboratory of Pest Monitoring and Green Management, Department of Plant Pathology, College of Plant Protection, China Agricultural University, Beijing, China
| | - Changfa Yin
- State Key Laboratory of Agrobiotechnology, China Agricultural University, Beijing, China
- MARA Key Laboratory of Pest Monitoring and Green Management, Department of Plant Pathology, College of Plant Protection, China Agricultural University, Beijing, China
| | - Huixia Zhang
- MARA Key Laboratory of Pest Monitoring and Green Management, Department of Plant Pathology, College of Plant Protection, China Agricultural University, Beijing, China
- MARA Key Laboratory of Surveillance and Management for Plant Quarantine Pests, Department of Plant Biosecurity, College of Plant Protection, China Agricultural University, Beijing, China
| | - Xiaozhou Xu
- State Key Laboratory of Agrobiotechnology, China Agricultural University, Beijing, China
- MARA Key Laboratory of Pest Monitoring and Green Management, Department of Plant Pathology, College of Plant Protection, China Agricultural University, Beijing, China
| | - Xiao Pan
- MARA Key Laboratory of Pest Monitoring and Green Management, Department of Plant Pathology, College of Plant Protection, China Agricultural University, Beijing, China
- MARA Key Laboratory of Surveillance and Management for Plant Quarantine Pests, Department of Plant Biosecurity, College of Plant Protection, China Agricultural University, Beijing, China
| | - Ruijin Wang
- MARA Key Laboratory of Pest Monitoring and Green Management, Department of Plant Pathology, College of Plant Protection, China Agricultural University, Beijing, China
- MARA Key Laboratory of Surveillance and Management for Plant Quarantine Pests, Department of Plant Biosecurity, College of Plant Protection, China Agricultural University, Beijing, China
| | - Liwang Fei
- State Key Laboratory of Agrobiotechnology, China Agricultural University, Beijing, China
- MARA Key Laboratory of Pest Monitoring and Green Management, Department of Plant Pathology, College of Plant Protection, China Agricultural University, Beijing, China
| | - Mengfei Li
- State Key Laboratory of Agrobiotechnology, China Agricultural University, Beijing, China
- MARA Key Laboratory of Pest Monitoring and Green Management, Department of Plant Pathology, College of Plant Protection, China Agricultural University, Beijing, China
| | - Linlu Qi
- MARA Key Laboratory of Pest Monitoring and Green Management, Department of Plant Pathology, College of Plant Protection, China Agricultural University, Beijing, China
| | - Vijai Bhadauria
- MARA Key Laboratory of Pest Monitoring and Green Management, Department of Plant Pathology, College of Plant Protection, China Agricultural University, Beijing, China
| | - Junfeng Liu
- State Key Laboratory of Agrobiotechnology, China Agricultural University, Beijing, China
- MARA Key Laboratory of Pest Monitoring and Green Management, Department of Plant Pathology, College of Plant Protection, China Agricultural University, Beijing, China
| | - You-Liang Peng
- State Key Laboratory of Agrobiotechnology, China Agricultural University, Beijing, China
- MARA Key Laboratory of Pest Monitoring and Green Management, Department of Plant Pathology, College of Plant Protection, China Agricultural University, Beijing, China
- * E-mail:
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Gong Y, Behera G, Erber L, Luo A, Chen Y. HypDB: A functionally annotated web-based database of the proline hydroxylation proteome. PLoS Biol 2022; 20:e3001757. [PMID: 36026437 PMCID: PMC9455854 DOI: 10.1371/journal.pbio.3001757] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2022] [Revised: 09/08/2022] [Accepted: 07/13/2022] [Indexed: 01/16/2023] Open
Abstract
Proline hydroxylation (Hyp) regulates protein structure, stability, and protein-protein interaction. It is widely involved in diverse metabolic and physiological pathways in cells and diseases. To reveal functional features of the Hyp proteome, we integrated various data sources for deep proteome profiling of the Hyp proteome in humans and developed HypDB (https://www.HypDB.site), an annotated database and web server for Hyp proteome. HypDB provides site-specific evidence of modification based on extensive LC-MS analysis and literature mining with 14,413 nonredundant Hyp sites on 5,165 human proteins including 3,383 Class I and 4,335 Class II sites. Annotation analysis revealed significant enrichment of Hyp on key functional domains and tissue-specific distribution of Hyp abundance across 26 types of human organs and fluids and 6 cell lines. The network connectivity analysis further revealed a critical role of Hyp in mediating protein-protein interactions. Moreover, the spectral library generated by HypDB enabled data-independent analysis (DIA) of clinical tissues and the identification of novel Hyp biomarkers in lung cancer and kidney cancer. Taken together, our integrated analysis of human proteome with publicly accessible HypDB revealed functional diversity of Hyp substrates and provides a quantitative data source to characterize Hyp in pathways and diseases.
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Affiliation(s)
- Yao Gong
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota at Twin Cities, Minneapolis, Minnesota, United States of America
- Bioinformatics and Computational Biology Program, University of Minnesota at Twin Cities, Minneapolis, Minnesota, United States of America
| | - Gaurav Behera
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota at Twin Cities, Minneapolis, Minnesota, United States of America
| | - Luke Erber
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota at Twin Cities, Minneapolis, Minnesota, United States of America
| | - Ang Luo
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota at Twin Cities, Minneapolis, Minnesota, United States of America
| | - Yue Chen
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota at Twin Cities, Minneapolis, Minnesota, United States of America
- Bioinformatics and Computational Biology Program, University of Minnesota at Twin Cities, Minneapolis, Minnesota, United States of America
- * E-mail:
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Wei X, Chen S, Xie T, Chen H, Jin X, Yang J, Sahar S, Huang H, Zhu S, Liu N, Yu C, Zhu P, Wang W, Zhang W. An MMP-degradable and conductive hydrogel to stabilize HIF-1α for recovering cardiac functions. Am J Cancer Res 2022; 12:127-142. [PMID: 34987638 PMCID: PMC8690911 DOI: 10.7150/thno.63481] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2021] [Accepted: 09/24/2021] [Indexed: 01/12/2023] Open
Abstract
Rationale: Although a few injectable hydrogels have shown a reliable biosafety and a moderate promise in treating myocardial infarction (MI), the updated hydrogel systems with an on-demand biodegradation and multi-biofunctions to deliver therapeutic drug would achieve more prominent efficacy in the future applications. In this report, a conductive and injectable hydrogel crosslinked by matrix metalloproteinase-sensitive peptides (MMP-SP) was rationally constructed to stabilize hypoxia-inducible factor-1α (HIF-1α) to recover heart functions after MI. Methods: Firstly, tetraaniline (TA) was incorporated into partially oxidized alginate (ALG-CHO) to endow the hydrogels with conductivity. The 1,4-dihydrophenonthrolin-4-one-3-carboxylic acid (DPCA) nanodrug was manufactured with high drug loading capacity and decorated with polymerized dopamine (PDA) to achieve a stable release of the drug. Both ALG-CHO and DPCA@PDA can be cross-linked by thiolated hyaluronic acid (HA-SH) and thiolated MMP-SP to construct a MMP-degradable and conductive hydrogel. After administration in the infarcted heart of rats, echocardiographic assessments, histological evaluation, and RT-PCR were used to evaluate therapeutic effects of hydrogels. Results: The cell viability and the results of subcutaneous implantation verify a good cytocompatibility and biocompatibility of the resulting hydrogels. The hydrogel shows remarkable strength in decreasing the expression of inflammatory factors, maintaining a high level of HIF-1α to promote the vascularization, and promoting the expression of junctional protein connexin 43. Meanwhile, the multifunctional hydrogels greatly reduce the infarcted area (by 33.8%) and improve cardiac functions dramatically with ejection fraction (EF) and fractional shortening (FS) being increased by 31.3% and 19.0%, respectively. Conclusion: The as-prepared hydrogels in this report achieve a favorable therapeutic effect, offering a promising therapeutic strategy for treating heart injury.
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Exploring the multifunctionality of SR proteins. Biochem Soc Trans 2021; 50:187-198. [PMID: 34940860 PMCID: PMC9022966 DOI: 10.1042/bst20210325] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2021] [Revised: 12/01/2021] [Accepted: 12/02/2021] [Indexed: 12/31/2022]
Abstract
Members of the arginine–serine-rich protein family (SR proteins) are multifunctional RNA-binding proteins that have emerged as key determinants for mRNP formation, identity and fate. They bind to pre-mRNAs early during transcription in the nucleus and accompany bound transcripts until they are translated or degraded in the cytoplasm. SR proteins are mostly known for their essential roles in constitutive splicing and as regulators of alternative splicing. However, many additional activities of individual SR proteins, beyond splicing, have been reported in recent years. We will summarize the different functions of SR proteins and discuss how multifunctionality can be achieved. We will also highlight the difficulties of studying highly versatile SR proteins and propose approaches to disentangle their activities, which is transferrable to other multifunctional RBPs.
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Harris M, Sun J, Keeran K, Aponte A, Singh K, Springer D, Gucek M, Pirooznia M, Cockman ME, Murphy E, Kennedy LM. Ogfod1 deletion increases cardiac beta-alanine levels and protects mice against ischemia-reperfusion injury. Cardiovasc Res 2021; 118:2847-2858. [PMID: 34668514 DOI: 10.1093/cvr/cvab323] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/22/2021] [Revised: 08/09/2021] [Indexed: 11/14/2022] Open
Abstract
AIMS Prolyl hydroxylation is a post-translational modification that regulates protein stability, turnover, and activity. The proteins that catalyze prolyl hydroxylation belong to the 2-oxoglutarate- and iron-dependent oxygenase family of proteins. 2-oxoglutarate- and iron-dependent oxygenase domain-containing protein 1 (Ogfod1), which hydroxylates a proline in ribosomal protein s23 is a newly-described member of this family. The aims of this study were to investigate roles for Ogfod1 in the heart, and in the heart's response to stress. METHODS AND RESULTS We isolated hearts from wild type (WT) and Ogfod1 knockout (KO) mice and performed quantitative proteomics using Tandem Mass Tag labelling coupled to Liquid Chromatography and tandem Mass Spectrometry (LC-MS/MS) to identify protein changes. Ingenuity Pathway Analysis identified "Urate Biosynthesis/Inosine 5'-phosphate Degradation" and "Purine Nucleotides Degradation II (Aerobic)" as the most significantly-enriched pathways. We performed metabolomics analysis and found that both purine and pyrimidine pathways were altered with the purine nucleotide inosine 5'-monophosphate (IMP) showing a 3.5-fold enrichment in KO hearts (P = 0.011) and the pyrimidine catabolism product beta-alanine showing a 1.7-fold enrichment in KO hearts (P = 0.014). As changes in these pathways have been shown to contribute to cardioprotection, we subjected isolated perfused hearts to ischemia and reperfusion (I/R). KO hearts showed a 41.4% decrease in infarct size and a 34% improvement in cardiac function compared to WT hearts. This protection was also evident in an in vivo I/R model. Additionally, our data show that treating isolated perfused WT hearts with carnosine, a metabolite of beta-alanine, improved protection in the context of I/R injury, whereas treating KO hearts with carnosine had no impact on recovery of function or infarct size. CONCLUSIONS Taken together, these data show that Ogfod1 deletion alters the myocardial proteome and metabolome to confer protection against I/R injury. TRANSLATIONAL PERSPECTIVE Heart disease is the leading cause of death in the US. In characterizing the cardiovascular effects of deleting the prolyl hydroxylase Ogfod1 and investigating its role in disease pathology, we found that deleting Ogfod1 protected hearts against ex vivo and in vivo I/R injury. Ogfod1-KO hearts showed significant metabolomic and proteomic changes that supported altered purine and pyrimidine nucleotide synthesis and turnover. Beta-alanine, a precursor of the anti-oxidant carnosine and a product of pyrimidine degradation, accumulated in KO hearts to help confer cardioprotection. Altogether, these data suggest a role for Ogfod1 downregulation as a therapeutic strategy for heart disease.
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Affiliation(s)
- Michael Harris
- Cardiovascular Branch, National Heart Lung and Blood Institute, National Institutes of Health, Bethesda, MD
| | - Junhui Sun
- Cardiovascular Branch, National Heart Lung and Blood Institute, National Institutes of Health, Bethesda, MD
| | - Karen Keeran
- Animal Surgery and Resources Core Facility, National Heart Lung and Blood Institute, National Institutes of Health, Bethesda, MD
| | - Angel Aponte
- Proteomics Core Facility, National Heart Lung and Blood Institute, National Institutes of Health, Bethesda, MD
| | - Komudi Singh
- Bioinformatics and Computational Biology Core Facility, National Heart Lung and Blood Institute, National Institutes of Health, Bethesda, MD
| | - Danielle Springer
- Murine Phenotyping Core Facility, National Heart Lung and Blood Institute, National Institutes of Health, Bethesda, MD
| | - Marjan Gucek
- Proteomics Core Facility, National Heart Lung and Blood Institute, National Institutes of Health, Bethesda, MD
| | - Mehdi Pirooznia
- Bioinformatics and Computational Biology Core Facility, National Heart Lung and Blood Institute, National Institutes of Health, Bethesda, MD
| | | | - Elizabeth Murphy
- Cardiovascular Branch, National Heart Lung and Blood Institute, National Institutes of Health, Bethesda, MD
| | - Leslie M Kennedy
- Cardiovascular Branch, National Heart Lung and Blood Institute, National Institutes of Health, Bethesda, MD
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Velázquez-Cruz A, Baños-Jaime B, Díaz-Quintana A, De la Rosa MA, Díaz-Moreno I. Post-translational Control of RNA-Binding Proteins and Disease-Related Dysregulation. Front Mol Biosci 2021; 8:658852. [PMID: 33987205 PMCID: PMC8111222 DOI: 10.3389/fmolb.2021.658852] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2021] [Accepted: 03/22/2021] [Indexed: 12/20/2022] Open
Abstract
Cell signaling mechanisms modulate gene expression in response to internal and external stimuli. Cellular adaptation requires a precise and coordinated regulation of the transcription and translation processes. The post-transcriptional control of mRNA metabolism is mediated by the so-called RNA-binding proteins (RBPs), which assemble with specific transcripts forming messenger ribonucleoprotein particles of highly dynamic composition. RBPs constitute a class of trans-acting regulatory proteins with affinity for certain consensus elements present in mRNA molecules. However, these regulators are subjected to post-translational modifications (PTMs) that constantly adjust their activity to maintain cell homeostasis. PTMs can dramatically change the subcellular localization, the binding affinity for RNA and protein partners, and the turnover rate of RBPs. Moreover, the ability of many RBPs to undergo phase transition and/or their recruitment to previously formed membrane-less organelles, such as stress granules, is also regulated by specific PTMs. Interestingly, the dysregulation of PTMs in RBPs has been associated with the pathophysiology of many different diseases. Abnormal PTM patterns can lead to the distortion of the physiological role of RBPs due to mislocalization, loss or gain of function, and/or accelerated or disrupted degradation. This Mini Review offers a broad overview of the post-translational regulation of selected RBPs and the involvement of their dysregulation in neurodegenerative disorders, cancer and other pathologies.
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Affiliation(s)
- Alejandro Velázquez-Cruz
- Instituto de Investigaciones Químicas, Centro de Investigaciones Científicas Isla de la Cartuja, Universidad de Sevilla, Consejo Superior de Investigaciones Científicas, Seville, Spain
| | - Blanca Baños-Jaime
- Instituto de Investigaciones Químicas, Centro de Investigaciones Científicas Isla de la Cartuja, Universidad de Sevilla, Consejo Superior de Investigaciones Científicas, Seville, Spain
| | - Antonio Díaz-Quintana
- Instituto de Investigaciones Químicas, Centro de Investigaciones Científicas Isla de la Cartuja, Universidad de Sevilla, Consejo Superior de Investigaciones Científicas, Seville, Spain
| | - Miguel A De la Rosa
- Instituto de Investigaciones Químicas, Centro de Investigaciones Científicas Isla de la Cartuja, Universidad de Sevilla, Consejo Superior de Investigaciones Científicas, Seville, Spain
| | - Irene Díaz-Moreno
- Instituto de Investigaciones Químicas, Centro de Investigaciones Científicas Isla de la Cartuja, Universidad de Sevilla, Consejo Superior de Investigaciones Científicas, Seville, Spain
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Sullivan DI, Jiang M, Hinchie AM, Roth MG, Bahudhanapati H, Nouraie M, Liu J, McDyer JF, Mallampalli RK, Zhang Y, Kass DJ, Finkel T, Alder JK. Transcriptional and Proteomic Characterization of Telomere-Induced Senescence in a Human Alveolar Epithelial Cell Line. Front Med (Lausanne) 2021; 8:600626. [PMID: 33634147 PMCID: PMC7902064 DOI: 10.3389/fmed.2021.600626] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2020] [Accepted: 01/05/2021] [Indexed: 01/16/2023] Open
Abstract
Cellular senescence due to telomere dysfunction has been hypothesized to play a role in age-associated diseases including idiopathic pulmonary fibrosis (IPF). It has been postulated that paracrine mediators originating from senescent alveolar epithelia signal to surrounding mesenchymal cells and contribute to disease pathogenesis. However, murine models of telomere-induced alveolar epithelial senescence fail to display the canonical senescence-associated secretory phenotype (SASP) that is observed in senescent human cells. In an effort to understand human-specific responses to telomere dysfunction, we modeled telomere dysfunction-induced senescence in a human alveolar epithelial cell line. We hypothesized that this system would enable us to probe for differences in transcriptional and proteomic senescence pathways in vitro and to identify novel secreted protein (secretome) changes that potentially contribute to the pathogenesis of IPF. Following induction of telomere dysfunction, a robust senescence phenotype was observed. RNA-seq analysis of the senescent cells revealed the SASP and comparisons to previous murine data highlighted differences in response to telomere dysfunction. We conducted a proteomic analysis of the senescent cells using a novel biotin ligase capable of labeling secreted proteins. Candidate biomarkers selected from our transcriptional and secretome data were then evaluated in IPF and control patient plasma. Four novel proteins were found to be differentially expressed between the patient groups: stanniocalcin-1, contactin-1, tenascin C, and total inhibin. Our data show that human telomere-induced, alveolar epithelial senescence results in a transcriptional SASP that is distinct from that seen in analogous murine cells. Our findings suggest that studies in animal models should be carefully validated given the possibility of species-specific responses to telomere dysfunction. We also describe a pragmatic approach for the study of the consequences of telomere-induced alveolar epithelial cell senescence in humans.
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Affiliation(s)
- Daniel I. Sullivan
- Department of Medicine, Division of Pulmonary, Allergy and Critical Care Medicine, University of Pittsburgh, Pittsburgh, PA, United States,Dorothy P. and Richard P. Simmons Center for Interstitial Lung Disease, Pittsburgh, PA, United States
| | - Mao Jiang
- Department of Medicine, Division of Pulmonary, Allergy and Critical Care Medicine, University of Pittsburgh, Pittsburgh, PA, United States,The Third Xiangya Hospital, Central South University, Changsha, China
| | - Angela M. Hinchie
- Department of Medicine, Division of Pulmonary, Allergy and Critical Care Medicine, University of Pittsburgh, Pittsburgh, PA, United States
| | - Mark G. Roth
- Department of Medicine, Division of Pulmonary, Allergy and Critical Care Medicine, University of Pittsburgh, Pittsburgh, PA, United States
| | - Harinath Bahudhanapati
- Department of Medicine, Division of Pulmonary, Allergy and Critical Care Medicine, University of Pittsburgh, Pittsburgh, PA, United States,Dorothy P. and Richard P. Simmons Center for Interstitial Lung Disease, Pittsburgh, PA, United States
| | - Mehdi Nouraie
- Department of Medicine, Division of Pulmonary, Allergy and Critical Care Medicine, University of Pittsburgh, Pittsburgh, PA, United States,Dorothy P. and Richard P. Simmons Center for Interstitial Lung Disease, Pittsburgh, PA, United States
| | - Jie Liu
- Aging Institute, University of Pittsburgh, Pittsburgh, PA, United States,University of Pittsburgh Medical Center, Pittsburgh, PA, United States,Division of Cardiology, Department of Medicine, University of Pittsburgh, Pittsburgh, PA, United States
| | - John F. McDyer
- Department of Medicine, Division of Pulmonary, Allergy and Critical Care Medicine, University of Pittsburgh, Pittsburgh, PA, United States
| | - Rama K. Mallampalli
- Department of Internal Medicine, The Ohio State University, Columbus, OH, United States
| | - Yingze Zhang
- Department of Medicine, Division of Pulmonary, Allergy and Critical Care Medicine, University of Pittsburgh, Pittsburgh, PA, United States,Dorothy P. and Richard P. Simmons Center for Interstitial Lung Disease, Pittsburgh, PA, United States
| | - Daniel J. Kass
- Department of Medicine, Division of Pulmonary, Allergy and Critical Care Medicine, University of Pittsburgh, Pittsburgh, PA, United States,Dorothy P. and Richard P. Simmons Center for Interstitial Lung Disease, Pittsburgh, PA, United States
| | - Toren Finkel
- Aging Institute, University of Pittsburgh, Pittsburgh, PA, United States,University of Pittsburgh Medical Center, Pittsburgh, PA, United States,Division of Cardiology, Department of Medicine, University of Pittsburgh, Pittsburgh, PA, United States
| | - Jonathan K. Alder
- Department of Medicine, Division of Pulmonary, Allergy and Critical Care Medicine, University of Pittsburgh, Pittsburgh, PA, United States,Dorothy P. and Richard P. Simmons Center for Interstitial Lung Disease, Pittsburgh, PA, United States,*Correspondence: Jonathan K. Alder
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11
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Hargrove-Grimes P, Mondal AK, Gumerson J, Nellissery J, Aponte AM, Gieser L, Qian H, Fariss RN, Bonifacino JS, Li T, Swaroop A. Loss of endocytosis-associated RabGEF1 causes aberrant morphogenesis and altered autophagy in photoreceptors leading to retinal degeneration. PLoS Genet 2020; 16:e1009259. [PMID: 33362196 PMCID: PMC7790415 DOI: 10.1371/journal.pgen.1009259] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2020] [Revised: 01/07/2021] [Accepted: 11/09/2020] [Indexed: 12/17/2022] Open
Abstract
Rab-GTPases and associated effectors mediate cargo transport through the endomembrane system of eukaryotic cells, regulating key processes such as membrane turnover, signal transduction, protein recycling and degradation. Using developmental transcriptome data, we identified Rabgef1 (encoding the protein RabGEF1 or Rabex-5) as the only gene associated with Rab GTPases that exhibited strong concordance with retinal photoreceptor differentiation. Loss of Rabgef1 in mice (Rabgef1-/-) resulted in defects specifically of photoreceptor morphology and almost complete loss of both rod and cone function as early as eye opening; however, aberrant outer segment formation could only partly account for visual function deficits. RabGEF1 protein in retinal photoreceptors interacts with Rabaptin-5, and RabGEF1 absence leads to reduction of early endosomes consistent with studies in other mammalian cells and tissues. Electron microscopy analyses reveal abnormal accumulation of macromolecular aggregates in autophagosome-like vacuoles and enhanced immunostaining for LC3A/B and p62 in Rabgef1-/- photoreceptors, consistent with compromised autophagy. Transcriptome analysis of the developing Rabgef1-/- retina reveals altered expression of 2469 genes related to multiple pathways including phototransduction, mitochondria, oxidative stress and endocytosis, suggesting an early trajectory of photoreceptor cell death. Our results implicate an essential role of the RabGEF1-modulated endocytic and autophagic pathways in photoreceptor differentiation and homeostasis. We propose that RabGEF1 and associated components are potential candidates for syndromic traits that include a retinopathy phenotype. Endocytosis and autophagy are evolutionarily conserved processes that are essential for maintenance of cellular homeostasis. RabGEF1 is a major regulator of the Rab5-GTPase, which participates in key steps during endocytosis and autophagy. We demonstrate that loss of RabGEF1 in mice causes specific developmental defects during photoreceptor outer segment formation, leading to visual dysfunction as early as eye opening followed by retinal degeneration. Rabgef1-/- retina shows a clear reduction in early endosomes as well as accumulation of autophagic vacuoles in developing photoreceptors. Together with transcriptome analysis, our studies suggest a trajectory of cellular events including altered autophagy that precede photoreceptor cell death in the absence of RabGEF1 and establish a critical role of endocytosis and autophagy in retinal development and proteostasis.
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Affiliation(s)
- Passley Hargrove-Grimes
- Neurobiology, Neurodegeneration & Repair Laboratory, National Eye Institute, National Institutes of Health, Bethesda, Maryland, United States of America
- Institute of Biomedical Sciences, George Washington University, Washington, District of Columbia, United States of America
| | - Anupam K. Mondal
- Neurobiology, Neurodegeneration & Repair Laboratory, National Eye Institute, National Institutes of Health, Bethesda, Maryland, United States of America
| | - Jessica Gumerson
- Neurobiology, Neurodegeneration & Repair Laboratory, National Eye Institute, National Institutes of Health, Bethesda, Maryland, United States of America
| | - Jacob Nellissery
- Neurobiology, Neurodegeneration & Repair Laboratory, National Eye Institute, National Institutes of Health, Bethesda, Maryland, United States of America
| | - Angel M. Aponte
- Proteomics Core, National Heart Lung and Blood Institute, National Institutes of Health, Bethesda, Maryland, United States of America
| | - Linn Gieser
- Neurobiology, Neurodegeneration & Repair Laboratory, National Eye Institute, National Institutes of Health, Bethesda, Maryland, United States of America
| | - Haohua Qian
- Visual Function Core, National Eye Institute, National Institutes of Health, Bethesda, Maryland, United States of America
| | - Robert N. Fariss
- Biological Imaging Core, National Eye Institute, National Institutes of Health, Bethesda, Maryland, United States of America
| | - Juan S. Bonifacino
- Neurosciences and Cellular and Structural Biology Division, Eunice Kennedy Shriver National Institute for Child Health and Development, National Institutes of Health, Bethesda, Maryland, United States of America
| | - Tiansen Li
- Neurobiology, Neurodegeneration & Repair Laboratory, National Eye Institute, National Institutes of Health, Bethesda, Maryland, United States of America
| | - Anand Swaroop
- Neurobiology, Neurodegeneration & Repair Laboratory, National Eye Institute, National Institutes of Health, Bethesda, Maryland, United States of America
- * E-mail:
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12
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Wang Y, Yi N, Hu Y, Zhou X, Jiang H, Lin Q, Chen R, Liu H, Gu Y, Tong C, Lu M, Zhang J, Zhang B, Peng L, Li L. Molecular Signatures and Networks of Cardiomyocyte Differentiation in Humans and Mice. MOLECULAR THERAPY. NUCLEIC ACIDS 2020; 21:696-711. [PMID: 32769060 PMCID: PMC7412763 DOI: 10.1016/j.omtn.2020.07.011] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/14/2020] [Revised: 05/05/2020] [Accepted: 07/06/2020] [Indexed: 12/23/2022]
Abstract
Cardiomyocyte differentiation derived from embryonic stem cells (ESCs) is a complex process involving molecular regulation of multiple levels. In this study, we first identify and compare differentially expressed gene (DEG) signatures of ESC-derived cardiomyocyte differentiation (ESCDCD) in humans and mice. Then, the multiscale embedded gene co-expression network analysis (MEGENA) of the human ESCDCD dataset is performed to identify 212 significantly co-expressed gene modules, which capture well the regulatory information of cardiomyocyte differentiation. Three modules respectively involved in the regulation of stem cell pluripotency, Wnt, and calcium pathways are enriched in the DEG signatures of the differentiation phase transition in the two species. Three human-specific cardiomyocyte differentiation phase transition modules are identified. Moreover, the potential regulation mechanisms of transcription factors during cardiomyocyte differentiation are also illustrated. Finally, several novel key drivers of ESCDCD are identified with the evidence of their expression during mouse embryonic cardiomyocyte differentiation. Using an integrative network analysis, the core molecular signatures and gene subnetworks (modules) underlying cardiomyocyte lineage commitment are identified in both humans and mice. Our findings provide a global picture of gene-gene co-regulation and identify key regulators during ESCDCD.
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Affiliation(s)
- Yumei Wang
- Key Laboratory of Arrhythmias, Ministry of Education, Shanghai East Hospital, Tongji University School of Medicine, Shanghai 200120, China; Institute of Medical Genetics, Tongji University, Shanghai 200092, China; Department of Medical Genetics, Tongji University School of Medicine, Shanghai 200092, China; Heart Health Center, Shanghai East Hospital, Tongji University School of Medicine, Shanghai 200120, China; Research Units of Origin and Regulation of Heart Rhythm, Chinese Academy of Medical Sciences, Shanghai 200092, China
| | - Na Yi
- Key Laboratory of Arrhythmias, Ministry of Education, Shanghai East Hospital, Tongji University School of Medicine, Shanghai 200120, China; Institute of Medical Genetics, Tongji University, Shanghai 200092, China; Department of Medical Genetics, Tongji University School of Medicine, Shanghai 200092, China; Heart Health Center, Shanghai East Hospital, Tongji University School of Medicine, Shanghai 200120, China; Research Units of Origin and Regulation of Heart Rhythm, Chinese Academy of Medical Sciences, Shanghai 200092, China
| | - Yi Hu
- Key Laboratory of Arrhythmias, Ministry of Education, Shanghai East Hospital, Tongji University School of Medicine, Shanghai 200120, China; Institute of Medical Genetics, Tongji University, Shanghai 200092, China; Department of Medical Genetics, Tongji University School of Medicine, Shanghai 200092, China; Heart Health Center, Shanghai East Hospital, Tongji University School of Medicine, Shanghai 200120, China; Research Units of Origin and Regulation of Heart Rhythm, Chinese Academy of Medical Sciences, Shanghai 200092, China
| | - Xianxiao Zhou
- Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, One Gustave L. Levy Place, New York, NY 10029, USA; Mount Sinai Center for Transformative Disease Modeling, Icahn School of Medicine at Mount Sinai, One Gustave L. Levy Place, New York, NY 10029, USA; Icahn Institute for Data Science and Genomic Technology, Icahn School of Medicine at Mount Sinai, One Gustave L. Levy Place, New York, NY 10029, USA
| | - Hanyu Jiang
- Key Laboratory of Arrhythmias, Ministry of Education, Shanghai East Hospital, Tongji University School of Medicine, Shanghai 200120, China
| | - Qin Lin
- Key Laboratory of Arrhythmias, Ministry of Education, Shanghai East Hospital, Tongji University School of Medicine, Shanghai 200120, China; Institute of Medical Genetics, Tongji University, Shanghai 200092, China; Department of Medical Genetics, Tongji University School of Medicine, Shanghai 200092, China; Heart Health Center, Shanghai East Hospital, Tongji University School of Medicine, Shanghai 200120, China; Research Units of Origin and Regulation of Heart Rhythm, Chinese Academy of Medical Sciences, Shanghai 200092, China
| | - Rou Chen
- Key Laboratory of Arrhythmias, Ministry of Education, Shanghai East Hospital, Tongji University School of Medicine, Shanghai 200120, China
| | - Huan Liu
- Key Laboratory of Arrhythmias, Ministry of Education, Shanghai East Hospital, Tongji University School of Medicine, Shanghai 200120, China; Institute of Medical Genetics, Tongji University, Shanghai 200092, China; Department of Medical Genetics, Tongji University School of Medicine, Shanghai 200092, China; Heart Health Center, Shanghai East Hospital, Tongji University School of Medicine, Shanghai 200120, China; Research Units of Origin and Regulation of Heart Rhythm, Chinese Academy of Medical Sciences, Shanghai 200092, China
| | - Yanqiong Gu
- Key Laboratory of Arrhythmias, Ministry of Education, Shanghai East Hospital, Tongji University School of Medicine, Shanghai 200120, China
| | - Chang Tong
- Key Laboratory of Arrhythmias, Ministry of Education, Shanghai East Hospital, Tongji University School of Medicine, Shanghai 200120, China
| | - Min Lu
- Key Laboratory of Arrhythmias, Ministry of Education, Shanghai East Hospital, Tongji University School of Medicine, Shanghai 200120, China
| | - Junfang Zhang
- Key Laboratory of Arrhythmias, Ministry of Education, Shanghai East Hospital, Tongji University School of Medicine, Shanghai 200120, China; Department of Medical Genetics, Tongji University School of Medicine, Shanghai 200092, China
| | - Bin Zhang
- Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, One Gustave L. Levy Place, New York, NY 10029, USA; Mount Sinai Center for Transformative Disease Modeling, Icahn School of Medicine at Mount Sinai, One Gustave L. Levy Place, New York, NY 10029, USA; Icahn Institute for Data Science and Genomic Technology, Icahn School of Medicine at Mount Sinai, One Gustave L. Levy Place, New York, NY 10029, USA
| | - Luying Peng
- Key Laboratory of Arrhythmias, Ministry of Education, Shanghai East Hospital, Tongji University School of Medicine, Shanghai 200120, China; Institute of Medical Genetics, Tongji University, Shanghai 200092, China; Department of Medical Genetics, Tongji University School of Medicine, Shanghai 200092, China; Heart Health Center, Shanghai East Hospital, Tongji University School of Medicine, Shanghai 200120, China; Research Units of Origin and Regulation of Heart Rhythm, Chinese Academy of Medical Sciences, Shanghai 200092, China.
| | - Li Li
- Key Laboratory of Arrhythmias, Ministry of Education, Shanghai East Hospital, Tongji University School of Medicine, Shanghai 200120, China; Institute of Medical Genetics, Tongji University, Shanghai 200092, China; Department of Medical Genetics, Tongji University School of Medicine, Shanghai 200092, China; Heart Health Center, Shanghai East Hospital, Tongji University School of Medicine, Shanghai 200120, China; Research Units of Origin and Regulation of Heart Rhythm, Chinese Academy of Medical Sciences, Shanghai 200092, China.
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13
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Kulkarni CA, Nadtochiy SM, Kennedy L, Zhang J, Chhim S, Alwaseem H, Murphy E, Fu D, Brookes PS. ALKBH7 mediates necrosis via rewiring of glyoxal metabolism. eLife 2020; 9:58573. [PMID: 32795389 PMCID: PMC7442491 DOI: 10.7554/elife.58573] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2020] [Accepted: 08/13/2020] [Indexed: 02/06/2023] Open
Abstract
Alkb homolog 7 (ALKBH7) is a mitochondrial α-ketoglutarate dioxygenase required for DNA alkylation-induced necrosis, but its function and substrates remain unclear. Herein, we show ALKBH7 regulates dialdehyde metabolism, which impacts the cardiac response to ischemia-reperfusion (IR) injury. Using a multi-omics approach, we find no evidence ALKBH7 functions as a prolyl-hydroxylase, but we do find Alkbh7-/- mice have elevated glyoxalase I (GLO-1), a dialdehyde detoxifying enzyme. Metabolic pathways related to the glycolytic by-product methylglyoxal (MGO) are rewired in Alkbh7-/- mice, along with elevated levels of MGO protein adducts. Despite greater glycative stress, hearts from Alkbh7-/- mice are protected against IR injury, in a manner blocked by GLO-1 inhibition. Integrating these observations, we propose ALKBH7 regulates glyoxal metabolism, and that protection against necrosis and cardiac IR injury bought on by ALKBH7 deficiency originates from the signaling response to elevated MGO stress.
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Affiliation(s)
- Chaitanya A Kulkarni
- Department of Anesthesiology & Perioperative Medicine, University of Rochester Medical Center, Rochester, NY, United States
| | - Sergiy M Nadtochiy
- Department of Anesthesiology & Perioperative Medicine, University of Rochester Medical Center, Rochester, NY, United States
| | - Leslie Kennedy
- NHLBI Intramural Research Program, National Institutes of Health, Bethesda, United States
| | - Jimmy Zhang
- Department of Anesthesiology & Perioperative Medicine, University of Rochester Medical Center, Rochester, NY, United States
| | - Sophea Chhim
- Department of Biology, University of Rochester, Rochester, NY, United States
| | - Hanan Alwaseem
- Department of Chemistry, University of Rochester, Rochester, NY, United States
| | - Elizabeth Murphy
- NHLBI Intramural Research Program, National Institutes of Health, Bethesda, United States
| | - Dragony Fu
- Department of Biology, University of Rochester, Rochester, NY, United States
| | - Paul S Brookes
- Department of Anesthesiology & Perioperative Medicine, University of Rochester Medical Center, Rochester, NY, United States
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14
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Qin H, Ni H, Liu Y, Yuan Y, Xi T, Li X, Zheng L. RNA-binding proteins in tumor progression. J Hematol Oncol 2020; 13:90. [PMID: 32653017 PMCID: PMC7353687 DOI: 10.1186/s13045-020-00927-w] [Citation(s) in RCA: 136] [Impact Index Per Article: 34.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Accepted: 06/25/2020] [Indexed: 02/08/2023] Open
Abstract
RNA-binding protein (RBP) has a highly dynamic spatiotemporal regulation process and important biological functions. They are critical to maintain the transcriptome through post-transcriptionally controlling the processing and transportation of RNA, including regulating RNA splicing, polyadenylation, mRNA stability, mRNA localization, and translation. Alteration of each process will affect the RNA life cycle, produce abnormal protein phenotypes, and thus lead to the occurrence and development of tumors. Here, we summarize RBPs involved in tumor progression and the underlying molecular mechanisms whereby they are regulated and exert their effects. This analysis is an important step towards the comprehensive characterization of post-transcriptional gene regulation involved in tumor progression.
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Affiliation(s)
- Hai Qin
- School of Life Science and Technology, Jiangsu Key Laboratory of Carcinogenesis and Intervention, China Pharmaceutical University, 639 Longmian Road, Nanjing, 211198, People's Republic of China
| | - Haiwei Ni
- School of Life Science and Technology, Jiangsu Key Laboratory of Carcinogenesis and Intervention, China Pharmaceutical University, 639 Longmian Road, Nanjing, 211198, People's Republic of China
| | - Yichen Liu
- School of Life Science and Technology, Jiangsu Key Laboratory of Carcinogenesis and Intervention, China Pharmaceutical University, 639 Longmian Road, Nanjing, 211198, People's Republic of China
| | - Yaqin Yuan
- Guizhou Medical Device Testing Center, Guiyang, 550004, Guizhou, People's Republic of China
| | - Tao Xi
- School of Life Science and Technology, Jiangsu Key Laboratory of Carcinogenesis and Intervention, China Pharmaceutical University, 639 Longmian Road, Nanjing, 211198, People's Republic of China.
| | - Xiaoman Li
- Jiangsu Key Laboratory for Pharmacology and Safety Evaluation of Chinese Materia Medica, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, 210023, People's Republic of China.
| | - Lufeng Zheng
- School of Life Science and Technology, Jiangsu Key Laboratory of Carcinogenesis and Intervention, China Pharmaceutical University, 639 Longmian Road, Nanjing, 211198, People's Republic of China.
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15
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Onisko BC. The Hydroxyproline Proteome of HeLa Cells with Emphasis on the Active Sites of Protein Disulfide Isomerases. J Proteome Res 2020; 19:756-768. [DOI: 10.1021/acs.jproteome.9b00625] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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16
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Cappabianca L, Farina AR, Di Marcotullio L, Infante P, De Simone D, Sebastiano M, Mackay AR. Discovery, characterization and potential roles of a novel NF-YAx splice variant in human neuroblastoma. JOURNAL OF EXPERIMENTAL & CLINICAL CANCER RESEARCH : CR 2019; 38:482. [PMID: 31805994 PMCID: PMC6896337 DOI: 10.1186/s13046-019-1481-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/23/2019] [Accepted: 11/13/2019] [Indexed: 02/06/2023]
Abstract
Background Identification of novel cancer-associated splice variants is of potential diagnostic, prognostic and therapeutic importance. NF-Y transcription factor is comprised of NF-YA, NF-YB and NF-YC subunits, binds inverted CCAAT-boxes in ≈70% of gene promoters, regulates > 1000 cancer-associated genes and proteins involved in proliferation, staminality, differentiation, apoptosis, metabolism and is subject to component alternative splicing. RT-PCR evaluation of alternative NF-YA splicing in primary human neuroblastomas (NBs), led to discovery of a novel NF-YAx splice variant, also expressed during mouse embryo development and induced by doxorubicin in NB cells. Here, we report the discovery and characterisation of NF-YAx and discus its potential roles in NB. Methods NF-YAx cDNA was RT-PCR-cloned from a stage 3 NB (provided by the Italian Association of Haematology and Paediatric Oncology, Genova, IT), sequenced and expressed as a protein using standard methods and compared to known fully-spliced NF-YAl and exon B-skipped NF-YAs isoforms in: EMSAs for capacity to form NF-Y complexes; by co-transfection, co-immunoprecipitation and Western blotting for capacity to bind Sp1; by IF for localisation; in AO/EtBr cell-death and colony formation assays for relative cytotoxicity, and by siRNA knockdown, use of inhibitors and Western blotting for potential mechanisms of action. Stable SH-SY5Y transfectants of all three NF-YA isoforms were also propagated and compared by RT-PCR and Western blotting for differences in cell-death and stem cell (SC)-associated gene expression, in cell-death assays for sensitivity to doxorubicin and in in vitro proliferation, substrate-independent growth and in vivo tumour xenograft assays for differences in growth and tumourigenic capacity. Results NF-YAx was characterized as a novel variant with NF-YA exons B, D and partial F skipping, detected in 20% of NF-YA positive NBs, was the exclusive isoform in a stage 3 NB, expressed in mouse stage E11.5–14 embryos and induced by doxorubicin in SH-SY5Y NB cells. The NF-YAx protein exhibited nuclear localisation, competed with other isoforms in CCAAT box-binding NF-Y complexes but, in contrast to other isoforms, did not bind Sp1. NF-YAx expression in neural-related progenitor and NB cells repressed Bmi1 expression, induced KIF1Bβ expression and promoted KIF1Bβ-dependent necroptosis but in NB cells also selected tumourigenic, doxorubicin-resistant, CSC-like sub-populations, resistant to NF-YAx cytotoxicity. Conclusions The discovery of NF-YAx in NBs, its expression in mouse embryos and induction by doxorubicin in NB cells, unveils a novel NF-YA splice mechanism and variant, regulated by and involved in development, genotoxic-stress and NB. NF-YAx substitution of other isoforms in NF-Y complexes and loss of capacity to bind Sp1, characterises this novel isoform as a functional modifier of NF-Y and its promotion of KIF1Bβ-dependent neural-lineage progenitor and NB cell necroptosis, association with doxorubicin-induced necroptosis and expression in mouse embryos coinciding with KIF1Bβ-dependent sympathetic neuroblast-culling, confirm a cytotoxic function and potential role in suppressing NB initiation. On the other hand, the in vitro selection of CSC-like NB subpopulations resistant to NF-YAx cytotoxicity not only helps to explain high-level exclusive NF-YAx expression in a stage 3 NB but also supports a role for NF-YAx in disease progression and identifies a potential doxorubicin-inducible mechanism for post-therapeutic relapse.
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Affiliation(s)
- Lucia Cappabianca
- Department of Applied Clinical and Biotechnological Sciences, University of L'Aquila, Via Vetoio, Coppito 2, 67100, L'Aquila, Italy
| | - Antonietta Rosella Farina
- Department of Applied Clinical and Biotechnological Sciences, University of L'Aquila, Via Vetoio, Coppito 2, 67100, L'Aquila, Italy
| | - Lucia Di Marcotullio
- Department of Molecular Medicine, La Sapienza University of Rome, 00161, Rome, Italy.,Istituto Pasteur-Fondazione Cenci Bolognetti, La Sapienza University of Rome, 00161, Rome, Italy
| | - Paola Infante
- Center for Life Nanoscience @ Sapienza, Istituto Italiano di Tecnologia, 00161, Rome, Italy
| | - Daniele De Simone
- Department of Applied Clinical and Biotechnological Sciences, University of L'Aquila, Via Vetoio, Coppito 2, 67100, L'Aquila, Italy
| | - Michela Sebastiano
- Department of Applied Clinical and Biotechnological Sciences, University of L'Aquila, Via Vetoio, Coppito 2, 67100, L'Aquila, Italy
| | - Andrew Reay Mackay
- Department of Applied Clinical and Biotechnological Sciences, University of L'Aquila, Via Vetoio, Coppito 2, 67100, L'Aquila, Italy.
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17
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García-Aguilar A, Martínez-Reyes I, Cuezva JM. Changes in the Turnover of the Cellular Proteome during Metabolic Reprogramming: A Role for mtROS in Proteostasis. J Proteome Res 2019; 18:3142-3155. [DOI: 10.1021/acs.jproteome.9b00239] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Ana García-Aguilar
- Departamento de Biología Molecular, Centro de Biología Molecular Severo Ochoa (CSIC-UAM), Centro de Investigación Biomédica en Red de Enfermedades Raras CIBERER-ISCIII, Instituto de Investigación Hospital 12 de Octubre (i+12), Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - Inmaculada Martínez-Reyes
- Departamento de Biología Molecular, Centro de Biología Molecular Severo Ochoa (CSIC-UAM), Centro de Investigación Biomédica en Red de Enfermedades Raras CIBERER-ISCIII, Instituto de Investigación Hospital 12 de Octubre (i+12), Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - José M. Cuezva
- Departamento de Biología Molecular, Centro de Biología Molecular Severo Ochoa (CSIC-UAM), Centro de Investigación Biomédica en Red de Enfermedades Raras CIBERER-ISCIII, Instituto de Investigación Hospital 12 de Octubre (i+12), Universidad Autónoma de Madrid, 28049 Madrid, Spain
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Stoehr A, Kennedy L, Yang Y, Patel S, Lin Y, Linask KL, Fergusson M, Zhu J, Gucek M, Zou J, Murphy E. The ribosomal prolyl-hydroxylase OGFOD1 decreases during cardiac differentiation and modulates translation and splicing. JCI Insight 2019; 5:128496. [PMID: 31112528 DOI: 10.1172/jci.insight.128496] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
The mechanisms regulating translation and splicing are not well understood. We provide insight into a new regulator of translation, OGFOD1 (2-oxoglutarate and iron dependent oxygenase domain-containing protein 1), which is a prolyl-hydroxylase that catalyzes the posttranslational hydroxylation of Pro-62 in the small ribosomal protein S23. We show that deletion of OGFOD1 in an in vitro model of human cardiomyocytes decreases translation of specific proteins (e.g., RNA-binding proteins) and alters splicing. RNA sequencing showed poor correlation between changes in mRNA and protein synthesis, suggesting that posttranscriptional regulation was the primary cause for the observed differences. We found that loss of OGFOD1 and the resultant alterations in protein translation modulates the cardiac proteome, shifting it towards higher protein amounts of sarcomeric proteins such as cardiac troponins, titin and cardiac myosin binding protein C. Furthermore, we found a decrease of OGFOD1 during cardiomyocyte differentiation. These results suggest that loss of OGFOD1 modulates protein translation and splicing, thereby leading to alterations in the cardiac proteome and highlight the role of altered translation and splicing in regulating the proteome..
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Affiliation(s)
| | | | | | | | - Yongshun Lin
- iPS Cell Core Facility, National Heart, Lung, and Blood Institute, NIH, Bethesda, Maryland, USA
| | - Kaari L Linask
- iPS Cell Core Facility, National Heart, Lung, and Blood Institute, NIH, Bethesda, Maryland, USA
| | | | - Jun Zhu
- DNA Sequencing and Genomics Core
| | | | - Jizhong Zou
- iPS Cell Core Facility, National Heart, Lung, and Blood Institute, NIH, Bethesda, Maryland, USA
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View from an mRNP: The Roles of SR Proteins in Assembly, Maturation and Turnover. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2019; 1203:83-112. [PMID: 31811631 DOI: 10.1007/978-3-030-31434-7_3] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
Abstract
Serine- and arginine-rich proteins (SR proteins) are a family of multitasking RNA-binding proteins (RBPs) that are key determinants of messenger ribonucleoprotein (mRNP) formation, identity and fate. Apart from their essential functions in pre-mRNA splicing, SR proteins display additional pre- and post-splicing activities and connect nuclear and cytoplasmic gene expression machineries. Through changes in their post-translational modifications (PTMs) and their subcellular localization, they provide functional specificity and adjustability to mRNPs. Transcriptome-wide UV crosslinking and immunoprecipitation (CLIP-Seq) studies revealed that individual SR proteins are present in distinct mRNPs and act in specific pairs to regulate different gene expression programmes. Adopting an mRNP-centric viewpoint, we discuss the roles of SR proteins in the assembly, maturation, quality control and turnover of mRNPs and describe the mechanisms by which they integrate external signals, coordinate their multiple tasks and couple subsequent mRNA processing steps.
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Williams AL, Khadka V, Tang M, Avelar A, Schunke KJ, Menor M, Shohet RV. HIF1 mediates a switch in pyruvate kinase isoforms after myocardial infarction. Physiol Genomics 2018; 50:479-494. [PMID: 29652636 PMCID: PMC6087881 DOI: 10.1152/physiolgenomics.00130.2017] [Citation(s) in RCA: 47] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2017] [Revised: 04/05/2018] [Accepted: 04/09/2018] [Indexed: 12/20/2022] Open
Abstract
Alternative splicing of RNA is an underexplored area of transcriptional response. We expect that early changes in alternatively spliced genes may be important for responses to cardiac injury. Hypoxia inducible factor 1 (HIF1) is a key transcription factor that rapidly responds to loss of oxygen through alteration of metabolism and angiogenesis. The goal of this study was to investigate the transcriptional response after myocardial infarction (MI) and to identify novel, hypoxia-driven changes, including alternative splicing. After ligation of the left anterior descending artery in mice, we observed an abrupt loss of cardiac contractility and upregulation of hypoxic signaling. We then performed RNA sequencing on ischemic heart tissue 1 and 3 days after infarct to assess early transcriptional changes and identified 89 transcripts with altered splicing. Of particular interest was the switch in Pkm isoform expression (pyruvate kinase, muscle). The usually predominant Pkm1 isoform was less abundant in ischemic hearts, while Pkm2 and associated splicing factors (hnRNPA1, hnRNPA2B1, Ptbp1) rapidly increased. Despite increased Pkm2 expression, total pyruvate kinase activity remained reduced in ischemic myocardial tissue. We also demonstrated HIF1 binding to PKM by chromatin immunoprecipitation, indicating a direct role for HIF1 in mediating this isoform switch. Our study provides a new, detailed characterization of the early transcriptome after MI. From this analysis, we identified an HIF1-mediated alternative splicing event in the PKM gene. Pkm1 and Pkm2 play distinct roles in glycolytic metabolism and the upregulation of Pkm2 is likely to have important consequences for ATP synthesis in infarcted cardiac muscle.
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Affiliation(s)
- Allison Lesher Williams
- Center for Cardiovascular Research, John A. Burns School of Medicine, University of Hawaii , Honolulu, Hawaii
| | - Vedbar Khadka
- Bioinformatics Core, John A. Burns School of Medicine, University of Hawaii , Honolulu, Hawaii
| | - Mingxin Tang
- Center for Cardiovascular Research, John A. Burns School of Medicine, University of Hawaii , Honolulu, Hawaii
| | - Abigail Avelar
- Center for Cardiovascular Research, John A. Burns School of Medicine, University of Hawaii , Honolulu, Hawaii
| | - Kathryn J Schunke
- Center for Cardiovascular Research, John A. Burns School of Medicine, University of Hawaii , Honolulu, Hawaii
| | - Mark Menor
- Bioinformatics Core, John A. Burns School of Medicine, University of Hawaii , Honolulu, Hawaii
| | - Ralph V Shohet
- Center for Cardiovascular Research, John A. Burns School of Medicine, University of Hawaii , Honolulu, Hawaii
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21
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Zhou T, Erber L, Liu B, Gao Y, Ruan HB, Chen Y. Proteomic analysis reveals diverse proline hydroxylation-mediated oxygen-sensing cellular pathways in cancer cells. Oncotarget 2018; 7:79154-79169. [PMID: 27764789 PMCID: PMC5346705 DOI: 10.18632/oncotarget.12632] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2016] [Accepted: 09/25/2016] [Indexed: 12/28/2022] Open
Abstract
Proline hydroxylation is a critical cellular mechanism regulating oxygen-response pathways in tumor initiation and progression. Yet, its substrate diversity and functions remain largely unknown. Here, we report a system-wide analysis to characterize proline hydroxylation substrates in cancer cells using an immunoaffinity-purification assisted proteomics strategy. We identified 562 sites from 272 proteins in HeLa cells. Bioinformatic analysis revealed that proline hydroxylation substrates are significantly enriched with mRNA processing and stress-response cellular pathways with canonical and diverse flanking sequence motifs. Structural analysis indicates a significant enrichment of proline hydroxylation participating in the secondary structure of substrate proteins. Our study identified and validated Brd4, a key transcription factor, as a novel proline hydroxylation substrate. Functional analysis showed that the inhibition of proline hydroxylation pathway significantly reduced the proline hydroxylation abundance on Brd4 and affected Brd4-mediated transcriptional activity as well as cell proliferation in AML leukemia cells. Taken together, our study identified a broad regulatory role of proline hydroxylation in cellular oxygen-sensing pathways and revealed potentially new targets that dynamically respond to hypoxia microenvironment in tumor cells.
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Affiliation(s)
- Tong Zhou
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota at Twin Cities, Minneapolis, MN 55455, USA
| | - Luke Erber
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota at Twin Cities, Minneapolis, MN 55455, USA
| | - Bing Liu
- Department of Integrative Biology and Physiology, University of Minnesota Medical School, Minneapolis, MN 55455, USA
| | - Yankun Gao
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota at Twin Cities, Minneapolis, MN 55455, USA
| | - Hai-Bin Ruan
- Department of Integrative Biology and Physiology, University of Minnesota Medical School, Minneapolis, MN 55455, USA
| | - Yue Chen
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota at Twin Cities, Minneapolis, MN 55455, USA
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Yong HJ, Park JS, Lee Jeong A, Han S, Lee S, Ka HI, Sumiyasuren B, Joo HJ, So SJ, Park JY, Yoon DY, Lim JS, Lee MS, Lee HG, Yang Y. Von Hippel-Lindau regulates interleukin-32β stability in ovarian cancer cells. Oncotarget 2017; 8:69833-69846. [PMID: 29050245 PMCID: PMC5642520 DOI: 10.18632/oncotarget.19311] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2017] [Accepted: 06/12/2017] [Indexed: 11/25/2022] Open
Abstract
Hypoxia-induced interleukin-32β (IL-32β) shifts the metabolic program to the enhanced glycolytic pathway. In the present study, the underlying mechanism by which hypoxia-induced IL-32β stability is regulated was investigated in ovarian cancer cells. IL-32β expression increased under hypoxic conditions in ovarian cancer cells as it did in breast cancer cells. The amount of IL-32β was regulated by post-translational control rather than by transcriptional activation. Under normoxic conditions, IL-32β was continuously eliminated through ubiquitin-dependent degradation by the von-Hippel Lindau (VHL) E3 ligase complex. Oxygen deficiency or reactive oxygen species (ROS) disrupted the interaction between IL-32β and VHL, leading to the accumulation of the cytokine. The fact that IL-32β is regulated by the energy-consuming ubiquitination system implies that it plays an important role in oxidative stress. We found that IL-32β reduced protein kinase Cδ (PKCδ)-induced apoptosis under oxidative stress. This implies that the hypoxia- and ROS-stabilized IL-32β contributes to sustain survival against PKCδ-induced apoptosis.
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Affiliation(s)
- Hyo Jeong Yong
- Department of Biological Sciences, Sookmyung Women's University, Seoul, Republic of Korea
| | - Jeong Su Park
- Department of Severance Biomedical Science Institute, Yonsei Biomedical Research Institute, Yonsei University College of Medicine, Seoul, Korea
| | - Ae Lee Jeong
- Department of Biological Sciences, Sookmyung Women's University, Seoul, Republic of Korea
| | - Sora Han
- Department of Biological Sciences, Sookmyung Women's University, Seoul, Republic of Korea
| | - Sunyi Lee
- Department of Biological Sciences, Sookmyung Women's University, Seoul, Republic of Korea
| | - Hye In Ka
- Department of Biological Sciences, Sookmyung Women's University, Seoul, Republic of Korea
| | | | - Hyun Jeong Joo
- Department of Biological Sciences, Sookmyung Women's University, Seoul, Republic of Korea
| | - Su Jeong So
- Department of Biological Sciences, Sookmyung Women's University, Seoul, Republic of Korea
| | - Ji Young Park
- Department of Biological Sciences, Sookmyung Women's University, Seoul, Republic of Korea
| | - Do-Young Yoon
- Department of Bioscience and Biotechnology, Bio/Molecular Informatics Center, Konkuk University, Seoul, Republic of Korea
| | - Jong-Seok Lim
- Department of Biological Sciences, Sookmyung Women's University, Seoul, Republic of Korea
| | - Myeong-Seok Lee
- Department of Biological Sciences, Sookmyung Women's University, Seoul, Republic of Korea
| | - Hee Gu Lee
- Immunotherapy Convergence Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon, Republic of Korea
| | - Young Yang
- Department of Biological Sciences, Sookmyung Women's University, Seoul, Republic of Korea
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