1
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Singh S, Gaur A, Sharma RK, Kumari R, Prakash S, Kumari S, Chaudhary AD, Prasun P, Pant P, Hunkler H, Thum T, Jagavelu K, Bharati P, Hanif K, Chitkara P, Kumar S, Mitra K, Gupta SK. Musashi-2 causes cardiac hypertrophy and heart failure by inducing mitochondrial dysfunction through destabilizing Cluh and Smyd1 mRNA. Basic Res Cardiol 2023; 118:46. [PMID: 37923788 DOI: 10.1007/s00395-023-01016-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/03/2023] [Revised: 10/06/2023] [Accepted: 10/09/2023] [Indexed: 11/06/2023]
Abstract
Regulation of RNA stability and translation by RNA-binding proteins (RBPs) is a crucial process altering gene expression. Musashi family of RBPs comprising Msi1 and Msi2 is known to control RNA stability and translation. However, despite the presence of MSI2 in the heart, its function remains largely unknown. Here, we aim to explore the cardiac functions of MSI2. We confirmed the presence of MSI2 in the adult mouse, rat heart, and neonatal rat cardiomyocytes. Furthermore, Msi2 was significantly enriched in the heart cardiomyocyte fraction. Next, using RNA-seq data and isoform-specific PCR primers, we identified Msi2 isoforms 1, 4, and 5, and two novel putative isoforms labeled as Msi2 6 and 7 to be expressed in the heart. Overexpression of Msi2 isoforms led to cardiac hypertrophy in cultured cardiomyocytes. Additionally, Msi2 exhibited a significant increase in a pressure-overload model of cardiac hypertrophy. We selected isoforms 4 and 7 to validate the hypertrophic effects due to their unique alternative splicing patterns. AAV9-mediated overexpression of Msi2 isoforms 4 and 7 in murine hearts led to cardiac hypertrophy, dilation, heart failure, and eventually early death, confirming a pathological function for Msi2. Using global proteomics, gene ontology, transmission electron microscopy, seahorse, and transmembrane potential measurement assays, increased MSI2 was found to cause mitochondrial dysfunction in the heart. Mechanistically, we identified Cluh and Smyd1 as direct downstream targets of Msi2. Overexpression of Cluh and Smyd1 inhibited Msi2-induced cardiac malfunction and mitochondrial dysfunction. Collectively, we show that Msi2 induces hypertrophy, mitochondrial dysfunction, and heart failure.
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Affiliation(s)
- Sandhya Singh
- Pharmacology Division, CSIR-Central Drug Research Institute, Sector 10, Jankipuram Extension, Lucknow, India, 226031
| | - Aakash Gaur
- Pharmacology Division, CSIR-Central Drug Research Institute, Sector 10, Jankipuram Extension, Lucknow, India, 226031
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
| | - Rakesh Kumar Sharma
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
- Division of Sophisticated Analytical Instrument Facility and Research, CSIR-Central Drug Research Institute, Lucknow, India
| | - Renu Kumari
- Pharmacology Division, CSIR-Central Drug Research Institute, Sector 10, Jankipuram Extension, Lucknow, India, 226031
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
| | - Shakti Prakash
- Pharmacology Division, CSIR-Central Drug Research Institute, Sector 10, Jankipuram Extension, Lucknow, India, 226031
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
| | - Sunaina Kumari
- Pharmacology Division, CSIR-Central Drug Research Institute, Sector 10, Jankipuram Extension, Lucknow, India, 226031
| | - Ayushi Devendrasingh Chaudhary
- Pharmacology Division, CSIR-Central Drug Research Institute, Sector 10, Jankipuram Extension, Lucknow, India, 226031
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
| | - Pankaj Prasun
- Pharmacology Division, CSIR-Central Drug Research Institute, Sector 10, Jankipuram Extension, Lucknow, India, 226031
| | - Priyanka Pant
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
- CSIR-Centre for Cellular and Molecular Biology, Hyderabad, India
| | - Hannah Hunkler
- Institute of Molecular and Translational Therapeutic Strategies, Hannover Medical School, Hannover, Germany
| | - Thomas Thum
- Institute of Molecular and Translational Therapeutic Strategies, Hannover Medical School, Hannover, Germany
- Fraunhofer Institute of Toxicology and Experimental Medicine, Hannover, Germany
| | - Kumaravelu Jagavelu
- Pharmacology Division, CSIR-Central Drug Research Institute, Sector 10, Jankipuram Extension, Lucknow, India, 226031
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
| | - Pragya Bharati
- Pharmacology Division, CSIR-Central Drug Research Institute, Sector 10, Jankipuram Extension, Lucknow, India, 226031
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
| | - Kashif Hanif
- Pharmacology Division, CSIR-Central Drug Research Institute, Sector 10, Jankipuram Extension, Lucknow, India, 226031
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
| | - Pragya Chitkara
- National Institute of Plant Genome Research, New Delhi, India
| | - Shailesh Kumar
- National Institute of Plant Genome Research, New Delhi, India
| | - Kalyan Mitra
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
- Division of Sophisticated Analytical Instrument Facility and Research, CSIR-Central Drug Research Institute, Lucknow, India
| | - Shashi Kumar Gupta
- Pharmacology Division, CSIR-Central Drug Research Institute, Sector 10, Jankipuram Extension, Lucknow, India, 226031.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India.
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2
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Ma Y, Fan C, Wang Y, Li W, Jiang H, Yang W. Comprehensive analysis of mRNAs in the cerebral cortex in APP/PS1 double-transgenic mice with Alzheimer's disease based on high-throughput sequencing of N4-acetylcytidine. Funct Integr Genomics 2023; 23:267. [PMID: 37548859 DOI: 10.1007/s10142-023-01192-z] [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: 02/11/2023] [Revised: 07/12/2023] [Accepted: 07/29/2023] [Indexed: 08/08/2023]
Abstract
N4-acetylcytidine (ac4C), a significant modified nucleoside, participates in the development of many diseases. Messenger RNAs (mRNAs) contain most of the information of the genome and are the molecules that transmit information from genes to proteins. Alzheimer's disease (AD) is a progressive neurodegenerative disease in which fibrillar amyloid plaques are present. However, it remains unknown how mRNA ac4C modification affects the development of AD. In the current study, ac4C-modified mRNAs were comprehensively analyzed in AD mice by ac4C-RIP-seq and RNA-seq. Next, a protein-protein interaction (PPI) network was constructed to examine the relationships between the genes with differential ac4C modification levels and their RNA expression levels. The differentially expressed genes (DEGs) acquired above were subjected to Gene Ontology (GO) enrichment and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway analysis to further analyze the molecular mechanisms in AD. In total, 3312 significant ac4C peaks were found on 2512 mRNAs, 1241 of which were hyperacetylated and 1271 of which were hypoacetylated. In addition, 956 mRNAs with differential expression were found, including 520 upregulated mRNAs and 436 downregulated mRNAs. Overall, 134 mRNAs with simultaneous changes at the ac4C levels as well as RNA expression levels were identified via joint analysis. Then, through PPI network construction and functional enrichment analysis, 37 key mRNAs were screened, which were predominantly enriched in GABAergic synapses and the PI3K/AKT signaling pathway. The significant difference in the abundance of mRNA ac4C modification indicates that this modification is associated with AD progression, which may provide insight for more investigations of the potential mechanisms.
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Affiliation(s)
- Yanzhen Ma
- Experimental Center of Clinical Research, The First Affiliated Hospital of Anhui University of Chinese Medicine, Anhui, China
| | - Chang Fan
- Experimental Center of Clinical Research, The First Affiliated Hospital of Anhui University of Chinese Medicine, Anhui, China
| | - Yongzhong Wang
- Key Laboratory of Xin'an Medicine of the Ministry of Education, Anhui University of Chinese Medicine, Hefei, Anhui, China
- Department of Pharmacy, The First Affiliated Hospital of Anhui University of Chinese Medicine, Anhui, China
| | - Weizu Li
- Department of Pharmacology, Basic Medicine College, Key Laboratory of Anti-Inflammatory and Immunopharmacology, Ministry of Education, Anhui Medical University, Hefei, China
| | - Hui Jiang
- Experimental Center of Clinical Research, The First Affiliated Hospital of Anhui University of Chinese Medicine, Anhui, China.
- Key Laboratory of Xin'an Medicine of the Ministry of Education, Anhui University of Chinese Medicine, Hefei, Anhui, China.
| | - Wenming Yang
- Key Laboratory of Xin'an Medicine of the Ministry of Education, Anhui University of Chinese Medicine, Hefei, Anhui, China.
- Encephalopathy Center, The First Affiliated Hospital of Anhui University of Chinese Medicine, Anhui, China.
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3
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Li W, Deng X, Chen J. RNA-binding proteins in regulating mRNA stability and translation: roles and mechanisms in cancer. Semin Cancer Biol 2022; 86:664-677. [PMID: 35381329 PMCID: PMC9526761 DOI: 10.1016/j.semcancer.2022.03.025] [Citation(s) in RCA: 31] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2022] [Revised: 03/25/2022] [Accepted: 03/30/2022] [Indexed: 01/10/2023]
Abstract
RNA-binding proteins (RBPs) are key players in cellular physiology through posttranscriptional regulation of the expression of target RNA transcripts. By modulating the processing, stability and translation of cancer-related messenger RNA (mRNA) transcripts, a large set of RBPs play essential roles in various types of cancers. Perturbations in RBP activity have been causally associated with cancer development, tumor metabolism, drug resistance, cancer stem cell self-renewal, and tumor immune evasion. Here, we summarize the recent advances in cancer pathological roles and mechanisms of RBPs in regulating mRNA stability and translation with an emphasis on the emerging category of RNA modification-associated RBPs. The functional diversity of RBPs in different types of cancers and the therapeutic potential of targeting dysregulated RBPs for cancer treatment are also discussed.
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Affiliation(s)
- Wei Li
- Department of Systems Biology, Beckman Research Institute of City of Hope, Monrovia 91016, USA
| | - Xiaolan Deng
- Department of Systems Biology, Beckman Research Institute of City of Hope, Monrovia 91016, USA
| | - Jianjun Chen
- Department of Systems Biology, Beckman Research Institute of City of Hope, Monrovia 91016, USA; City of Hope Comprehensive Cancer Center, Duarte, CA 91010, USA; Gehr Family Center for Leukemia Research, City of Hope, Duarte, CA 91010, USA.
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4
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Raguraman R, Shanmugarama S, Mehta M, Elle Peterson J, Zhao YD, Munshi A, Ramesh R. Drug delivery approaches for HuR-targeted therapy for lung cancer. Adv Drug Deliv Rev 2022; 180:114068. [PMID: 34822926 PMCID: PMC8724414 DOI: 10.1016/j.addr.2021.114068] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2021] [Accepted: 11/18/2021] [Indexed: 01/03/2023]
Abstract
Lung cancer (LC) is often diagnosed at an advanced stage and conventional treatments for disease management have limitations associated with them. Novel therapeutic targets are thus avidly sought for the effective management of LC. RNA binding proteins (RBPs) have been convincingly established as key players in tumorigenesis, and their dysregulation is linked to multiple cancers, including LC. In this context, we review the role of Human antigen R (HuR), an RBP that is overexpressed in LC, and further associated with various aspects of LC tumor growth and response to therapy. Herein, we describe the role of HuR in LC progression and outline the evidences supporting various pharmacologic and biologic approaches for inhibiting HuR expression and function. These approaches, including use of small molecule inhibitors, siRNAs and shRNAs, have demonstrated favorable results in reducing tumor cell growth, invasion and migration, angiogenesis and metastasis. Hence, HuR has significant potential as a key therapeutic target in LC. Use of siRNA-based approaches, however, have certain limitations that prevent their maximal exploitation as cancer therapies. To address this, in the conclusion of this review, we provide a list of nanomedicine-based HuR targeting approaches currently being employed for siRNA and shRNA delivery, and provide a rationale for the immense potential therapeutic benefits offered by nanocarrier-based HuR targeting and its promise for treating patients with LC.
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Affiliation(s)
- Rajeswari Raguraman
- Department of Pathology, The University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA; Stephenson Cancer Center, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
| | - Santny Shanmugarama
- Department of Pathology, The University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA; Graduate Program in Biomedical Sciences, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA
| | - Meghna Mehta
- Radiation Oncology, The University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA; Stephenson Cancer Center, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
| | - Jo Elle Peterson
- Department of Pathology, The University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
| | - Yan D Zhao
- Biostatistics and Epidemiology, The University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA; Stephenson Cancer Center, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
| | - Anupama Munshi
- Radiation Oncology, The University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA; Stephenson Cancer Center, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
| | - Rajagopal Ramesh
- Department of Pathology, The University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA; Stephenson Cancer Center, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA; Graduate Program in Biomedical Sciences, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA.
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5
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Lu Z, Fang Z, Guo Y, Liu X, Chen S. Cisplatin resistance of NSCLC cells involves upregulation of visfatin through activation of its transcription and stabilization of mRNA. Chem Biol Interact 2021; 351:109705. [PMID: 34656559 DOI: 10.1016/j.cbi.2021.109705] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2021] [Revised: 09/28/2021] [Accepted: 10/13/2021] [Indexed: 11/16/2022]
Abstract
Non-small cell lung cancer (NSCLC) is one of the prevalent and deadly cancers worldwide. Cisplatin (CDDP) has been used as a standard adjuvant therapy for advanced NSCLC patients, while chemoresistance is one of the most challenging problems to limit its clinical application. Our data showed that the expression of visfatin was significantly increased in CDDP resistant NSCLC cells as compared with that in their parental cells, while knockdown of visfatin or its neutralization antibody can restore the CDDP sensitivity of resistant NSCLC cells. The upregulation of visfatin in CDDP resistant NSCLC cells was due to the increased mRNA stability and promoter activity. Further, we found that signal transducer and activator of transcription 3 (STAT3), which was increased in chemoresistant cells, can increase the transcription of visfatin. While tristetraprolin (TTP), which can decease mRNA stability of visfatin, was decreased in chemoresistant cells. Inhibition of STAT3 or over expression of TTP can restore CDDP sensitivity of resistant NSCLC cells. Collectively, our data showed that STAT3 and TTP-regulated expression of visfatin was involved in CDDP resistance of NSCLC cells. It indicated that targeted inhibition of visfatin should be a potential approach to overcome CDDP resistance of NSCLC treatment.
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Affiliation(s)
- Zihao Lu
- Department of Cardiothoracic Surgery, Jiujiang First People's Hospital, JiuJiang, 332000, China.
| | - Zheng Fang
- Department of Cardiothoracic Surgery, Jiujiang First People's Hospital, JiuJiang, 332000, China.
| | - Ying Guo
- Department of Cardiothoracic Surgery, Jiujiang First People's Hospital, JiuJiang, 332000, China.
| | - Xianfeng Liu
- Department of Cardiothoracic Surgery, Jiujiang First People's Hospital, JiuJiang, 332000, China.
| | - Shengjia Chen
- Department of Cardiothoracic Surgery, Jiujiang First People's Hospital, JiuJiang, 332000, China.
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6
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Cartilage oligomeric matrix protein is an endogenous β-arrestin-2-selective allosteric modulator of AT1 receptor counteracting vascular injury. Cell Res 2021; 31:773-790. [PMID: 33510386 PMCID: PMC8249609 DOI: 10.1038/s41422-020-00464-8] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2020] [Accepted: 12/15/2020] [Indexed: 01/30/2023] Open
Abstract
Compelling evidence has revealed that biased activation of G protein-coupled receptor (GPCR) signaling, including angiotensin II (AngII) receptor type 1 (AT1) signaling, plays pivotal roles in vascular homeostasis and injury, but whether a clinically relevant endogenous biased antagonism of AT1 signaling exists under physiological and pathophysiological conditions has not been clearly elucidated. Here, we show that an extracellular matrix protein, cartilage oligomeric matrix protein (COMP), acts as an endogenous allosteric biased modulator of the AT1 receptor and its deficiency is clinically associated with abdominal aortic aneurysm (AAA) development. COMP directly interacts with the extracellular N-terminus of the AT1 via its EGF domain and inhibits AT1-β-arrestin-2 signaling, but not Gq or Gi signaling, in a selective manner through allosteric regulation of AT1 intracellular conformational states. COMP deficiency results in activation of AT1a-β-arrestin-2 signaling and subsequent exclusive AAA formation in response to AngII infusion. AAAs in COMP-/- or ApoE-/- mice are rescued by AT1a or β-arrestin-2 deficiency, or the application of a peptidomimetic mimicking the AT1-binding motif of COMP. Explorations of the endogenous biased antagonism of AT1 receptor or other GPCRs may reveal novel therapeutic strategies for cardiovascular diseases.
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7
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Nagai N, Kawashima H, Toda E, Homma K, Osada H, Guzman NA, Shibata S, Uchiyama Y, Okano H, Tsubota K, Ozawa Y. Renin-angiotensin system impairs macrophage lipid metabolism to promote age-related macular degeneration in mouse models. Commun Biol 2020; 3:767. [PMID: 33299105 PMCID: PMC7725839 DOI: 10.1038/s42003-020-01483-2] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2019] [Accepted: 11/16/2020] [Indexed: 12/16/2022] Open
Abstract
Metabolic syndrome, a condition involving obesity and hypertension, increases the risk of aging-associated diseases such as age-related macular degeneration (AMD). Here, we demonstrated that high-fat diet (HFD)-fed mice accumulated oxidized low-density lipoprotein (ox-LDL) in macrophages through the renin–angiotensin system (RAS). The ox-LDL-loaded macrophages were responsible for visual impairment in HFD mice along with a disorder of the retinal pigment epithelium (RPE), which is required for photoreceptor outer segment renewal. RAS repressed ELAVL1, which reduced PPARγ, impeding ABCA1 induction to levels that are sufficient to excrete overloaded cholesterol within the macrophages. The ox-LDL-loaded macrophages expressed inflammatory cytokines and attacked the RPE. An antihypertensive drug, angiotensin II type 1 receptor (AT1R) blocker, resolved the decompensation of lipid metabolism in the macrophages and reversed the RPE condition and visual function in HFD mice. AT1R signaling could be a future therapeutic target for macrophage-associated aging diseases, such as AMD. Nagai et al. show that mice fed high-fat diet (HFD) accumulate oxidized low-density lipoprotein in macrophages through the renin–angiotensin system, which impairs visual function. They find that angiotensin II type 1 receptor (AT1R) improves the visual function of HFD mice, suggesting AT1R signaling as a potential therapeutic target for age-related macular degeneration.
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Affiliation(s)
- Norihiro Nagai
- Laboratory of Retinal Cell Biology, Department of Ophthalmology, Keio University School of Medicine, 35 Shinanomachi, Shinjukuku, Tokyo, 160-8582, Japan.,Department of Ophthalmology, Keio University School of Medicine, 35 Shinanomachi, Shinjukuku, Tokyo, 160-8582, Japan
| | - Hirohiko Kawashima
- Laboratory of Retinal Cell Biology, Department of Ophthalmology, Keio University School of Medicine, 35 Shinanomachi, Shinjukuku, Tokyo, 160-8582, Japan.,Department of Ophthalmology, Keio University School of Medicine, 35 Shinanomachi, Shinjukuku, Tokyo, 160-8582, Japan
| | - Eriko Toda
- Laboratory of Retinal Cell Biology, Department of Ophthalmology, Keio University School of Medicine, 35 Shinanomachi, Shinjukuku, Tokyo, 160-8582, Japan
| | - Kohei Homma
- Laboratory of Retinal Cell Biology, Department of Ophthalmology, Keio University School of Medicine, 35 Shinanomachi, Shinjukuku, Tokyo, 160-8582, Japan
| | - Hideto Osada
- Laboratory of Retinal Cell Biology, Department of Ophthalmology, Keio University School of Medicine, 35 Shinanomachi, Shinjukuku, Tokyo, 160-8582, Japan
| | - Naymel A Guzman
- Laboratory of Retinal Cell Biology, Department of Ophthalmology, Keio University School of Medicine, 35 Shinanomachi, Shinjukuku, Tokyo, 160-8582, Japan.,Department of Ophthalmology, Keio University School of Medicine, 35 Shinanomachi, Shinjukuku, Tokyo, 160-8582, Japan
| | - Shinsuke Shibata
- Department of Physiology, Keio University School of Medicine, 35 Shinanomachi, Shinjukuku, Tokyo, 160-8582, Japan
| | - Yasuo Uchiyama
- Department of Cellular and Molecular Neuropathology, Juntendo University Graduate School of Medicine, Bunkyo-Ku, Tokyo, 113-0033, Japan
| | - Hideyuki Okano
- Department of Physiology, Keio University School of Medicine, 35 Shinanomachi, Shinjukuku, Tokyo, 160-8582, Japan
| | - Kazuo Tsubota
- Department of Ophthalmology, Keio University School of Medicine, 35 Shinanomachi, Shinjukuku, Tokyo, 160-8582, Japan
| | - Yoko Ozawa
- Laboratory of Retinal Cell Biology, Department of Ophthalmology, Keio University School of Medicine, 35 Shinanomachi, Shinjukuku, Tokyo, 160-8582, Japan. .,Department of Ophthalmology, Keio University School of Medicine, 35 Shinanomachi, Shinjukuku, Tokyo, 160-8582, Japan. .,Department of Ophthalmology, St. Luke's International Hospital, 9-1 Akashi-Cho, Chuo-Ku, Tokyo, 104-8560, Japan. .,St. Luke's International University, 9-1 Akashi-Cho, Tokyo, 104-8560, Japan.
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8
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Govindappa PK, Patil M, Garikipati VNS, Verma SK, Saheera S, Narasimhan G, Zhu W, Kishore R, Zhang J, Krishnamurthy P. Targeting exosome-associated human antigen R attenuates fibrosis and inflammation in diabetic heart. FASEB J 2019; 34:2238-2251. [PMID: 31907992 DOI: 10.1096/fj.201901995r] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2019] [Revised: 11/14/2019] [Accepted: 11/21/2019] [Indexed: 12/16/2022]
Abstract
RNA-binding proteins like human antigen R (HuR) are key regulators in post-transcriptional control of gene expression in several pathophysiological conditions. Diabetes adversely affects monocyte/macrophage biology and function. It is not known whether diabetic milieu affects cellular/exosome-HuR and its implications on cardiac inflammation and fibrosis. Here, we evaluate in vitro and in vivo effects of diabetic milieu on macrophage cellular/exosome-HuR, alterations in intercellular cross talk with fibroblasts, and its impact on cardiac remodeling. Human failing hearts show higher HuR levels. Diabetic milieu activates HuR expression in cardiac- and cultured bone marrow-derived macrophages (BMMØ) and stimulates HuR nuclear-to-cytoplasmic translocation and exosome transfer. Exosomes from macrophages exposed to diabetic milieu (high glucose or db/db mice) significantly increase inflammatory and profibrogenic responses in fibroblast (in vitro) and cardiac fibrosis in mice. Intriguingly, Exo-HuR deficiency (HuR knockdown in macrophage) abrogates the above effects. In diabetic mice, macrophage depletion followed by reconstitution with BMMØ-derived HuR-deficient exosomes inhibits angiotensin II-induced cardiac fibrosis response and preserves left ventricle function as compared to control-exosome administration. To the best of our knowledge, this is the first study to demonstrate that diabetes activates BMMØ HuR expression and its transfer into exosome. The data suggest that HuR might be targeted to alleviate macrophage dysfunction and pathological fibrosis in diabetes.
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Affiliation(s)
- Prem Kumar Govindappa
- Department of Biomedical Engineering, Schools of Medicine and Engineering, The University of Alabama at Birmingham, AL, USA
| | - Mallikarjun Patil
- Department of Biomedical Engineering, Schools of Medicine and Engineering, The University of Alabama at Birmingham, AL, USA
| | | | - Suresh K Verma
- Division of Cardiovascular Disease, School of Medicine, University of Alabama at Birmingham, AL, USA
| | - Sherin Saheera
- Department of Biomedical Engineering, Schools of Medicine and Engineering, The University of Alabama at Birmingham, AL, USA
| | - Gayathri Narasimhan
- Department of Biomedical Engineering, Schools of Medicine and Engineering, The University of Alabama at Birmingham, AL, USA
| | - Wuqiang Zhu
- Department of Biomedical Engineering, Schools of Medicine and Engineering, The University of Alabama at Birmingham, AL, USA
| | - Raj Kishore
- Center for Translational Medicine, Temple University School of Medicine, Philadelphia, PA, USA
| | - Jianyi Zhang
- Department of Biomedical Engineering, Schools of Medicine and Engineering, The University of Alabama at Birmingham, AL, USA
| | - Prasanna Krishnamurthy
- Department of Biomedical Engineering, Schools of Medicine and Engineering, The University of Alabama at Birmingham, AL, USA
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9
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Green LC, Anthony SR, Slone S, Lanzillotta L, Nieman ML, Wu X, Robbins N, Jones SM, Roy S, Owens AP, Aube J, Xu L, Lorenz JN, Blaxall BC, Rubinstein J, Benoit JB, Tranter M. Human antigen R as a therapeutic target in pathological cardiac hypertrophy. JCI Insight 2019; 4:121541. [PMID: 30668549 DOI: 10.1172/jci.insight.121541] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2018] [Accepted: 01/14/2019] [Indexed: 01/06/2023] Open
Abstract
RNA binding proteins represent an emerging class of proteins with a role in cardiac dysfunction. We show that activation of the RNA binding protein human antigen R (HuR) is increased in the failing human heart. To determine the functional role of HuR in pathological cardiac hypertrophy, we created an inducible cardiomyocyte-specific HuR-deletion mouse and showed that HuR deletion reduces left ventricular hypertrophy, dilation, and fibrosis while preserving cardiac function in a transverse aortic constriction (TAC) model of pressure overload-induced hypertrophy. Assessment of HuR-dependent changes in global gene expression suggests that the mechanistic basis for this protection occurs through a reduction in fibrotic signaling, specifically through a reduction in TGF-β (Tgfb) expression. Finally, pharmacological inhibition of HuR at a clinically relevant time point following the initial development of pathological hypertrophy after TAC also yielded a significant reduction in pathological progression, as marked by a reduction in hypertrophy, dilation, and fibrosis and preserved function. In summary, this study demonstrates a functional role for HuR in the progression of pressure overload-induced cardiac hypertrophy and establishes HuR inhibition as a viable therapeutic approach for pathological cardiac hypertrophy and heart failure.
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Affiliation(s)
- Lisa C Green
- Department of Internal Medicine, Division of Cardiovascular Health and Disease and.,Department of Pharmacology and Systems Physiology, University of Cincinnati College of Medicine, Cincinnati, Ohio, USA
| | - Sarah R Anthony
- Department of Internal Medicine, Division of Cardiovascular Health and Disease and
| | - Samuel Slone
- Department of Internal Medicine, Division of Cardiovascular Health and Disease and.,Department of Pharmacology and Systems Physiology, University of Cincinnati College of Medicine, Cincinnati, Ohio, USA
| | - Lindsey Lanzillotta
- Department of Internal Medicine, Division of Cardiovascular Health and Disease and
| | - Michelle L Nieman
- Department of Pharmacology and Systems Physiology, University of Cincinnati College of Medicine, Cincinnati, Ohio, USA
| | - Xiaoqing Wu
- Department of Molecular Biosciences, University of Kansas, Lawrence, Kansas, USA
| | - Nathan Robbins
- Department of Internal Medicine, Division of Cardiovascular Health and Disease and
| | - Shannon M Jones
- Department of Internal Medicine, Division of Cardiovascular Health and Disease and
| | - Sudeshna Roy
- Division of Chemical Biology and Medicinal Chemistry, Eshelman School of Pharmacy, University of North Carolina, Chapel Hill, North Carolina, USA
| | - A Phillip Owens
- Department of Internal Medicine, Division of Cardiovascular Health and Disease and
| | - Jeffrey Aube
- Division of Chemical Biology and Medicinal Chemistry, Eshelman School of Pharmacy, University of North Carolina, Chapel Hill, North Carolina, USA
| | - Liang Xu
- Department of Molecular Biosciences, University of Kansas, Lawrence, Kansas, USA
| | - John N Lorenz
- Department of Pharmacology and Systems Physiology, University of Cincinnati College of Medicine, Cincinnati, Ohio, USA
| | - Burns C Blaxall
- Department of Pediatrics, Division of Molecular Cardiovascular Biology, Heart Institute, Cincinnati Children's Hospital Medical Center (CCHMC), Cincinnati, Ohio, USA
| | - Jack Rubinstein
- Department of Internal Medicine, Division of Cardiovascular Health and Disease and
| | - Joshua B Benoit
- Department of Biological Sciences, University of Cincinnati, Cincinnati, Ohio, USA
| | - Michael Tranter
- Department of Internal Medicine, Division of Cardiovascular Health and Disease and
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10
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Schmidtke L, Schrick K, Saurin S, Käfer R, Gather F, Weinmann-Menke J, Kleinert H, Pautz A. The KH-type splicing regulatory protein (KSRP) regulates type III interferon expression post-transcriptionally. Biochem J 2019; 476:333-352. [PMID: 30578289 DOI: 10.1042/bcj20180522] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2018] [Revised: 12/14/2018] [Accepted: 12/21/2018] [Indexed: 12/12/2022]
Abstract
Type III interferons (IFNs) are the latest members of the IFN family. They play an important role in immune defense mechanisms, especially in antiviral responses at mucosal sites. Moreover, they control inflammatory reactions by modulating neutrophil and dendritic cell functions. Therefore, it is important to identify cellular mechanisms involved in the control of type III IFN expression. All IFN family members contain AU-rich elements (AREs) in the 3'-untranslated regions (3'-UTR) of their mRNAs that determine mRNA half-life and consequently the expressional level of these cytokines. mRNA stability is controlled by different proteins binding to these AREs leading to either stabilization or destabilization of the respective target mRNA. The KH-type splicing regulatory protein KSRP (also named KHSRP) is an important negative regulator of ARE-containing mRNAs. Here, we identify the interferon lambda 3 (IFNL3) mRNA as a new KSRP target by pull-down and immunoprecipitation experiments, as well as luciferase reporter gene assays. We characterize the KSRP-binding site in the IFNL3 3'-UTR and demonstrate that KSRP regulates the mRNA half-life of the IFNL3 transcript. In addition, we detect enhanced expression of IFNL3 mRNA in KSRP-/- mice, establishing a negative regulatory function of KSRP in type III IFN expression also in vivo Besides KSRP the RNA-binding protein AUF1 (AU-rich element RNA-binding protein 1) also seems to be involved in the regulation of type III IFN mRNA expression.
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Affiliation(s)
- Lisa Schmidtke
- Department of Pharmacology, University Medical Center of the Johannes Gutenberg-University, Obere Zahlbacher Str. 67, 55101 Mainz, Germany
| | - Katharina Schrick
- Department of Pharmacology, University Medical Center of the Johannes Gutenberg-University, Obere Zahlbacher Str. 67, 55101 Mainz, Germany
| | - Sabrina Saurin
- First Medical Department, University Medical Center of the Johannes Gutenberg-University, Langenbeck Str. 1, 55101 Mainz, Germany
| | - Rudolf Käfer
- Department of Pharmacology, University Medical Center of the Johannes Gutenberg-University, Obere Zahlbacher Str. 67, 55101 Mainz, Germany
| | - Fabian Gather
- Department of Pharmacology, University Medical Center of the Johannes Gutenberg-University, Obere Zahlbacher Str. 67, 55101 Mainz, Germany
| | - Julia Weinmann-Menke
- First Medical Department, University Medical Center of the Johannes Gutenberg-University, Langenbeck Str. 1, 55101 Mainz, Germany
| | - Hartmut Kleinert
- Department of Pharmacology, University Medical Center of the Johannes Gutenberg-University, Obere Zahlbacher Str. 67, 55101 Mainz, Germany
| | - Andrea Pautz
- Department of Pharmacology, University Medical Center of the Johannes Gutenberg-University, Obere Zahlbacher Str. 67, 55101 Mainz, Germany
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11
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Ouhara K, Munenaga S, Kajiya M, Takeda K, Matsuda S, Sato Y, Hamamoto Y, Iwata T, Yamasaki S, Akutagawa K, Mizuno N, Fujita T, Sugiyama E, Kurihara H. The induced RNA-binding protein, HuR, targets 3'-UTR region of IL-6 mRNA and enhances its stabilization in periodontitis. Clin Exp Immunol 2018; 192:325-336. [PMID: 29393507 PMCID: PMC5980314 DOI: 10.1111/cei.13110] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/29/2018] [Indexed: 12/19/2022] Open
Abstract
RNA-binding proteins (RBPs) regulate mRNA stability by binding to the 3'-untranslated region (UTR) region of mRNA. Human antigen-R (HuR), one of the RBPs, is involved in the progression of diseases, such as rheumatoid arthritis, diabetes mellitus and some inflammatory diseases. Interleukin (IL)-6 is a major inflammatory cytokine regulated by HuR binding to mRNA. Periodontal disease (PD) is also an inflammatory disease caused by elevations in IL-6 following an infection by periodontopathogenic bacteria. The involvement of HuR in the progression of PD was assessed using in-vitro and in-vivo experiments. Immunohistochemistry of inflamed periodontal tissue showed strong staining of HuR in the epithelium and connective tissue. HuR mRNA and protein level was increased following stimulation with Porphyromonas gingivalis (Pg), one of the periodontopathogenic bacteria, lipopolysacchride (LPS)-derived from Pg (PgLPS) and tumour necrosis factor (TNF)-α in OBA-9, an immortalized human gingival epithelial cell. The luciferase activity of 3'-UTR of IL-6 mRNA was increased by TNF-α, Pg and PgLPS in OBA-9. Luciferase activity was also increased in HuR-over-expressing OBA-9 following a bacterial stimulation. Down-regulation of HuR by siRNA resulted in a decrease in mRNA expression and production of IL-6. In contrast, the over-expression of HuR increased IL-6 mRNA expression and production in OBA-9. The HuR inhibitor, quercetin, suppressed Pg-induced HuR mRNA expression and IL-6 production in OBA-9. An oral inoculation with quercetin also inhibited bone resorption in ligature-induced periodontitis model mice as a result of down-regulation of IL-6. These results show that HuR modulates inflammatory responses by regulating IL-6.
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Affiliation(s)
- K. Ouhara
- Department of Periodontal MedicineGraduate School of Biomedical and Sciences, Hiroshima UniversityHiroshimaJapan
| | - S. Munenaga
- Department of Periodontal MedicineGraduate School of Biomedical and Sciences, Hiroshima UniversityHiroshimaJapan
| | - M. Kajiya
- Department of Periodontal MedicineGraduate School of Biomedical and Sciences, Hiroshima UniversityHiroshimaJapan
| | - K. Takeda
- Department of Periodontal MedicineGraduate School of Biomedical and Sciences, Hiroshima UniversityHiroshimaJapan
| | - S. Matsuda
- Department of Periodontal MedicineGraduate School of Biomedical and Sciences, Hiroshima UniversityHiroshimaJapan
| | - Y. Sato
- Department of Periodontal MedicineGraduate School of Biomedical and Sciences, Hiroshima UniversityHiroshimaJapan
| | - Y. Hamamoto
- Department of Periodontal MedicineGraduate School of Biomedical and Sciences, Hiroshima UniversityHiroshimaJapan
| | - T. Iwata
- Department of Periodontal MedicineGraduate School of Biomedical and Sciences, Hiroshima UniversityHiroshimaJapan
| | - S. Yamasaki
- Kurume University Medical CenterFukuokaJapan
| | - K. Akutagawa
- Department of Periodontal MedicineGraduate School of Biomedical and Sciences, Hiroshima UniversityHiroshimaJapan
| | - N. Mizuno
- Department of Periodontal MedicineGraduate School of Biomedical and Sciences, Hiroshima UniversityHiroshimaJapan
| | - T. Fujita
- Department of Periodontal MedicineGraduate School of Biomedical and Sciences, Hiroshima UniversityHiroshimaJapan
| | - E. Sugiyama
- Department of Clinical Immunology and RheumatologyHiroshima University HospitalHiroshimaJapan
| | - H. Kurihara
- Department of Periodontal MedicineGraduate School of Biomedical and Sciences, Hiroshima UniversityHiroshimaJapan
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12
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Zhang K, Yan F, Lei X, Wei D, Lu H, Zhu Z, Xiang A, Ye Z, Wang L, Zheng W, Li X, Yuan J, Lu Z, Yuan J. Androgen receptor‑mediated upregulation of quaking affects androgen receptor‑related prostate cancer development and anti‑androgen receptor therapy. Mol Med Rep 2018; 17:8203-8211. [PMID: 29658587 PMCID: PMC5984001 DOI: 10.3892/mmr.2018.8882] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2017] [Accepted: 09/13/2017] [Indexed: 12/28/2022] Open
Abstract
The androgen receptor (AR) has a crucial role in prostate cancer. RNA‑binding protein‑mediated post‑transcriptional regulation is important in the initiation and development of cancer. The present study attempted to elucidate the mutual association of AR and RNA‑binding protein quaking (QKI) in the development of prostate cancer. Dual‑luciferase reporter demonstrated that AR can positively regulate the expression of QKI in prostate cancer cell lines due to its effective transcription regulating function. In addition, QKI may increase expression of AR by heat shock protein 90, which is a coactivator of AR, and silencing QKI can increase the sensitive of Casodex, which is an antagonist of AR in castration‑resistant prostate cancer. This may be a new strategy for advanced prostate cancer.
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Affiliation(s)
- Keke Zhang
- Department of Urology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi 710032, P.R. China
| | - Fei Yan
- Department of Urology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi 710032, P.R. China
| | - Xiaoying Lei
- State Key Laboratory of Cancer Biology, Department of Pharmacogenomics, School of Pharmacy, Fourth Military Medical University, Xi'an, Shaanxi 710032, P.R. China
| | - Di Wei
- Department of Urology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi 710032, P.R. China
| | - Huanyu Lu
- State Key Laboratory of Cancer Biology, Department of Pharmacogenomics, School of Pharmacy, Fourth Military Medical University, Xi'an, Shaanxi 710032, P.R. China
| | - Zheng Zhu
- Department of Urology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi 710032, P.R. China
| | - An Xiang
- State Key Laboratory of Cancer Biology, Department of Pharmacogenomics, School of Pharmacy, Fourth Military Medical University, Xi'an, Shaanxi 710032, P.R. China
| | - Zichen Ye
- State Key Laboratory of Cancer Biology, Department of Pharmacogenomics, School of Pharmacy, Fourth Military Medical University, Xi'an, Shaanxi 710032, P.R. China
| | - Li Wang
- State Key Laboratory of Cancer Biology, Department of Pharmacogenomics, School of Pharmacy, Fourth Military Medical University, Xi'an, Shaanxi 710032, P.R. China
| | - Wanxiang Zheng
- Department of Urology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi 710032, P.R. China
| | - Xi'an Li
- Department of Urology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi 710032, P.R. China
| | - Jiarui Yuan
- Department of Biochemistry, University of Washington, Seattle, WA 98195‑5852, USA
| | - Zifan Lu
- State Key Laboratory of Cancer Biology, Department of Pharmacogenomics, School of Pharmacy, Fourth Military Medical University, Xi'an, Shaanxi 710032, P.R. China
| | - Jianlin Yuan
- Department of Urology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi 710032, P.R. China
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13
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Yin J, Li R, Liu W, Chen Y, Zhang X, Li X, He X, Duan C. Neuroprotective Effect of Protein Phosphatase 2A/Tristetraprolin Following Subarachnoid Hemorrhage in Rats. Front Neurosci 2018. [PMID: 29535596 PMCID: PMC5835096 DOI: 10.3389/fnins.2018.00096] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Early brain injury (EBI) following subarachnoid hemorrhage (SAH) can lead to inflammation and neuronal dysfunction. There is a need for effective strategies to mitigate these effects and improve the outcome of patients who experience SAH. The mRNA-destabilizing protein tristetraprolin (TTP) is an anti-inflammatory factor that induces the decay of cytokine transcripts and has been implicated in diseases such as glioma. However, the mechanism of action of TTP in EBI after SAH is unclear. The present study investigated the effects of TTP regulation via phosphorylation in a rat model of SAH by protein phosphatase (PP)2A, which is a pleiotropic enzyme complex with multiple substrate phospho-proteins. We hypothesized that inhibitory phosphorylation of TTP by PP2A would reduce neuroinflammation and apoptosis. To evaluate the function of each factor, the PP2A agonist FTY720, short interfering (si)RNAs targeting TTP and PP2A were administered to rats by intracerebroventricular injection 24 h before SAH. Rats were evaluated with SAH grade, neurological score, brain water content and by western blotting, and terminal deoxynucleotidyltransferase dUTP nick-end labeling. We found that endogenous PP2A and TTP levels were increased after SAH. FTY720 induced PP2A activation would lead to dephosphorylation and activation of TTP and decreased production of tumor necrosis factor (TNF)-α, interleukin (IL)-6, and IL-8. SiRNA-mediated TTP knockdown abolished anti-inflammatory effects of FTY720 treatment, indicating that PP2A was associated with TTP activation in vivo. Decreased TNF-α, IL-6, and IL-8 levels were associated with improvement of neurological function, reduction of brain edema, suppression of caspase-3, and up-regulation of B cell lymphoma-2. These results demonstrated that PP2A activation could enhance the anti-inflammatory and anti-apoptotic effects of TTP, by which it might shed light on the development of an effective therapeutic strategy against EBI following SAH.
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Affiliation(s)
- Jian Yin
- The National Key Clinic Specialty, The Neurosurgery Institute of Guangdong Province, Guangdong Provincial Key Laboratory on Brain Function Repair and Regeneration, Department of Neurosurgery, Zhujiang Hospital, Southern Medical University, Guangzhou, China.,Departments of Neurosurgery, Hanghzou Red Cross Hospital, Hangzhou, China
| | - Ran Li
- The National Key Clinic Specialty, The Neurosurgery Institute of Guangdong Province, Guangdong Provincial Key Laboratory on Brain Function Repair and Regeneration, Department of Neurosurgery, Zhujiang Hospital, Southern Medical University, Guangzhou, China
| | - Wenchao Liu
- The National Key Clinic Specialty, The Neurosurgery Institute of Guangdong Province, Guangdong Provincial Key Laboratory on Brain Function Repair and Regeneration, Department of Neurosurgery, Zhujiang Hospital, Southern Medical University, Guangzhou, China
| | - Yunchang Chen
- The National Key Clinic Specialty, The Neurosurgery Institute of Guangdong Province, Guangdong Provincial Key Laboratory on Brain Function Repair and Regeneration, Department of Neurosurgery, Zhujiang Hospital, Southern Medical University, Guangzhou, China
| | - Xin Zhang
- The National Key Clinic Specialty, The Neurosurgery Institute of Guangdong Province, Guangdong Provincial Key Laboratory on Brain Function Repair and Regeneration, Department of Neurosurgery, Zhujiang Hospital, Southern Medical University, Guangzhou, China
| | - Xifeng Li
- The National Key Clinic Specialty, The Neurosurgery Institute of Guangdong Province, Guangdong Provincial Key Laboratory on Brain Function Repair and Regeneration, Department of Neurosurgery, Zhujiang Hospital, Southern Medical University, Guangzhou, China
| | - Xuying He
- The National Key Clinic Specialty, The Neurosurgery Institute of Guangdong Province, Guangdong Provincial Key Laboratory on Brain Function Repair and Regeneration, Department of Neurosurgery, Zhujiang Hospital, Southern Medical University, Guangzhou, China
| | - Chuanzhi Duan
- The National Key Clinic Specialty, The Neurosurgery Institute of Guangdong Province, Guangdong Provincial Key Laboratory on Brain Function Repair and Regeneration, Department of Neurosurgery, Zhujiang Hospital, Southern Medical University, Guangzhou, China
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14
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Zhou YF, Li YN, Jin HJ, Wu JH, He QW, Wang XX, Lei H, Hu B. Sema4D/PlexinB1 inhibition ameliorates blood-brain barrier damage and improves outcome after stroke in rats. FASEB J 2018; 32:2181-2196. [PMID: 29242274 DOI: 10.1096/fj.201700786rr] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The inflammatory process in stroke is the major contributor to blood-brain barrier (BBB) breakdown. Previous studies indicated that semaphorin 4D (Sema4D), an axon guidance molecule, initiated inflammatory microglial activation and disrupted endothelial function in the CNS. However, whether Sema4D disrupts BBB integrity after stroke remains unclear. To study the effect of Sema4D on BBB disruption in stroke, rats were subjected to transient middle cerebral artery occlusion and targeted injection of lentivirus-mediated clustered regularly interspaced short palindromic repeats (CRISPR)/Cas9 gene disruption of PlexinB1. We found that Sema4D synchronously increased with BBB permeability and accumulated in the perivascular area after stroke. Suppressing Sema4D/PlexinB1 signaling in the periinfarct cortex significantly decreased BBB permeability as detected by MRI and fibrin deposition, and thereby improved stroke outcome. In vitro, we confirmed that Sema4D disrupted BBB integrity and endothelial tight junctions. Moreover, we found that Sema4D induced pericytes to acquire a CD11b-positive phenotype and express proinflammatory cytokines. In addition, Sema4D inhibited AUF1-induced proinflammatory mRNA decay effect. Taken together, our data provides evidence that Sema4D disrupts BBB integrity and promotes an inflammatory response by binding to PlexinB1 in pericytes after transient middle cerebral artery occlusion. Our study indicates that Sema4D may be a novel therapeutic target for treatment in the acute phase of stroke.-Zhou, Y.-F., Li, Y.-N., Jin, H.-J., Wu, J.-H., He, Q.-W., Wang, X.-X., Lei, H., Hu, B. Sema4D/PlexinB1 inhibition ameliorates blood-brain barrier damage and improves outcome after stroke in rats.
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Affiliation(s)
- Yi-Fan Zhou
- Department of Neurology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Ya-Nan Li
- Department of Neurology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Hui-Juan Jin
- Department of Neurology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Jie-Hong Wu
- Department of Neurology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Quan-Wei He
- Department of Neurology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Xu-Xia Wang
- National Center for Magnetic Resonance in Wuhan, State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan, China
| | - Hao Lei
- National Center for Magnetic Resonance in Wuhan, State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan, China
| | - Bo Hu
- Department of Neurology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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15
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Nutter CA, Kuyumcu-Martinez MN. Emerging roles of RNA-binding proteins in diabetes and their therapeutic potential in diabetic complications. WILEY INTERDISCIPLINARY REVIEWS-RNA 2017; 9. [PMID: 29280295 DOI: 10.1002/wrna.1459] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2017] [Revised: 10/19/2017] [Accepted: 11/05/2017] [Indexed: 12/11/2022]
Abstract
Diabetes is a debilitating health care problem affecting 422 million people around the world. Diabetic patients suffer from multisystemic complications that can cause mortality and morbidity. Recent advancements in high-throughput next-generation RNA-sequencing and computational algorithms led to the discovery of aberrant posttranscriptional gene regulatory programs in diabetes. However, very little is known about how these regulatory programs are mis-regulated in diabetes. RNA-binding proteins (RBPs) are important regulators of posttranscriptional RNA networks, which are also dysregulated in diabetes. Human genetic studies provide new evidence that polymorphisms and mutations in RBPs are linked to diabetes. Therefore, we will discuss the emerging roles of RBPs in abnormal posttranscriptional gene expression in diabetes. Questions that will be addressed are: Which posttranscriptional mechanisms are disrupted in diabetes? Which RBPs are responsible for such changes under diabetic conditions? How are RBPs altered in diabetes? How does dysregulation of RBPs contribute to diabetes? Can we target RBPs using RNA-based methods to restore gene expression profiles in diabetic patients? Studying the evolving roles of RBPs in diabetes is critical not only for a comprehensive understanding of diabetes pathogenesis but also to design RNA-based therapeutic approaches for diabetic complications. WIREs RNA 2018, 9:e1459. doi: 10.1002/wrna.1459 This article is categorized under: RNA in Disease and Development > RNA in Disease RNA Processing > Splicing Regulation/Alternative Splicing Translation > Translation Regulation.
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Affiliation(s)
- Curtis A Nutter
- Department of Biochemistry and Molecular Biology, University of Texas Medical Branch, Galveston, Texas
| | - Muge N Kuyumcu-Martinez
- Department of Biochemistry and Molecular Biology, University of Texas Medical Branch, Galveston, Texas.,Department of Neuroscience and Cell Biology, University of Texas Medical Branch, Galveston, Texas.,Institute for Translational Sciences, University of Texas Medical Branch, Galveston, Texas
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16
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Accornero F, Schips TG, Petrosino JM, Gu SQ, Kanisicak O, van Berlo JH, Molkentin JD. BEX1 is an RNA-dependent mediator of cardiomyopathy. Nat Commun 2017; 8:1875. [PMID: 29192139 PMCID: PMC5709413 DOI: 10.1038/s41467-017-02005-1] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2016] [Accepted: 11/01/2017] [Indexed: 01/29/2023] Open
Abstract
Regulation of mRNA splicing, processing and stability is increasingly recognized as a critical control point in dynamically altering gene expression during stress or disease. Very little is understood of this process in heart failure. Here, we show that BEX1 is a heart failure-induced gene functioning as an mRNA-associated protein that enhances expression of a subset of cardiac disease-promoting genes. Modeling the increase in BEX1 that occurs in disease, cardiac-specific BEX1 transgenic mice show worse cardiac disease with stress stimulation, whereas Bex1 gene-deleted mice are protected from heart failure-promoting insults. Proteomic and interactive screening assays show that BEX1 is part of a large ribonucleoprotein processing complex involved in regulating proinflammatory mRNA expression in the heart. Specifically, induction of BEX1 augments the stability and expression of AU-rich element containing mRNAs typically found within proinflammatory genes. Thus, BEX1 functions as an mRNA-dependent effector that augments pathology-promoting gene expression during heart failure. Little is known about the changes in mRNA splicing, processing and stability that can alter gene expression during heart failure. Here, the authors show that BEX1 is induced during heart failure and is part of a ribonucleoprotein complex enhancing the expression and stability of proinflammatory genes.
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Affiliation(s)
- Federica Accornero
- Cincinnati Children's Hospital Medical Center, Cincinnati, OH, 45229, USA. .,Dorothy M. Davis Heart and Lung Research Institute, Department of Physiology and Cell Biology, Ohio State University, Columbus, OH, 43210, USA.
| | - Tobias G Schips
- Cincinnati Children's Hospital Medical Center, Cincinnati, OH, 45229, USA
| | - Jennifer M Petrosino
- Dorothy M. Davis Heart and Lung Research Institute, Department of Physiology and Cell Biology, Ohio State University, Columbus, OH, 43210, USA
| | - Shan-Qing Gu
- Dorothy M. Davis Heart and Lung Research Institute, Department of Physiology and Cell Biology, Ohio State University, Columbus, OH, 43210, USA
| | - Onur Kanisicak
- Cincinnati Children's Hospital Medical Center, Cincinnati, OH, 45229, USA
| | - Jop H van Berlo
- Cincinnati Children's Hospital Medical Center, Cincinnati, OH, 45229, USA.,Department of Medicine, Lillehei Heart Institute, University of Minnesota, Minneapolis, MN, 55455, USA
| | - Jeffery D Molkentin
- Cincinnati Children's Hospital Medical Center, Cincinnati, OH, 45229, USA. .,Howard Hughes Medical Institute, Cincinnati, OH, 45229, USA.
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17
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Inflammation-regulated mRNA stability and the progression of vascular inflammatory diseases. Clin Sci (Lond) 2017; 131:2687-2699. [PMID: 29109302 DOI: 10.1042/cs20171373] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2017] [Revised: 10/09/2017] [Accepted: 10/10/2017] [Indexed: 12/22/2022]
Abstract
Cardiovascular disease remains a major medical and socioeconomic burden in developed and developing societies, and will increase with an aging and increasingly sedentary society. Vascular disease and atherosclerotic vascular syndromes are essentially inflammatory disorders, and transcriptional and post-transcriptional processes play essential roles in the ability of resident vascular and inflammatory cells to adapt to environmental stimuli. The regulation of mRNA translocation, stability, and translation are key processes of post-transcriptional regulation that permit these cells to rapidly respond to inflammatory stimuli. For the most part, these processes are controlled by elements in the 3'-UTR of labile, proinflammatory transcripts. Since proinflammatory transcripts almost exclusively contain AU-rich elements (AREs), this represents a tightly regulated and specific mechanism for initiation and maintenance of the proinflammatory phenotype. RNA-binding proteins (RBPs) recognize cis elements in 3'-UTR, and regulate each of these processes, but there is little literature exploring the concept that RBPs themselves can be directly regulated by inflammatory stimuli. Conceptually, inflammation-responsive RBPs represent an attractive target of rational therapies to combat vascular inflammatory syndromes. Herein we briefly describe the cellular and molecular etiology of atherosclerosis, and summarize our current understanding of RBPs and their specific roles in regulation of inflammatory mRNA stability. We also detail RBPs as targets of current anti-inflammatory modalities and how this may translate into better treatment for vascular inflammatory diseases.
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18
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Slone S, Anthony SR, Wu X, Benoit JB, Aube J, Xu L, Tranter M. Activation of HuR downstream of p38 MAPK promotes cardiomyocyte hypertrophy. Cell Signal 2016; 28:1735-41. [PMID: 27521603 DOI: 10.1016/j.cellsig.2016.08.005] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2016] [Revised: 08/02/2016] [Accepted: 08/08/2016] [Indexed: 10/21/2022]
Abstract
The RNA binding protein Human antigen R (HuR) interacts with specific AU-rich domains in target mRNAs and is highly expressed in many cell types, including cardiomyocytes. However, the role of HuR in cardiac physiology is largely unknown. Our results show that HuR undergoes cytoplasmic translocation, indicative of its activation, in hypertrophic cardiac myocytes. Specifically, HuR cytoplasmic translocation is significantly increased in NRVMs (neonatal rat ventricular myocytes) following treatment with phenylephrine or angiotensin II, agonists of two independent Gαq-coupled GPCRs known to induce hypertrophy. This Gq-mediated HuR activation is dependent on p38 MAP kinase, but not canonical Gq-PKC signaling. Furthermore, we show that HuR activation is necessary for Gq-mediated hypertrophic growth of NRVMs as siRNA-mediated knockdown of HuR inhibits hypertrophy as measured by cell size and expression of ANF (atrial natriuretic factor). Additionally, HuR overexpression is sufficient to induce hypertrophic cell growth. To decipher the downstream mechanisms by which HuR translocation promotes cardiomyocyte hypertrophy, we assessed the role of HuR in the transcriptional activity of NFAT (nuclear factor of activated T cells), the activation of which is a hallmark of cardiac hypertrophy. Using an NFAT-luciferase reporter assay, we show an acute inhibition of NFAT transcriptional activity following pharmacological inhibition of HuR. In conclusion, our results identify HuR as a novel mediator of cardiac hypertrophy downstream of the Gq-p38 MAPK pathway, and suggest modulation of NFAT activity as a potential mechanism.
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Affiliation(s)
- Samuel Slone
- Division of Cardiovascular Health and Disease, University of Cincinnati College of Medicine, Cincinnati, OH, United States
| | - Sarah R Anthony
- Division of Cardiovascular Health and Disease, University of Cincinnati College of Medicine, Cincinnati, OH, United States
| | - Xiaoqing Wu
- Department of Molecular Biosciences, University of Kansas, Lawrence, KS, United States
| | - Joshua B Benoit
- Department of Biological Sciences, McMicken College of Arts and Sciences, University of Cincinnati, Cincinnati, OH, United States
| | - Jeffrey Aube
- Department of Medicinal Chemistry, Eshelman School of Pharmacy, University of North Carolina, Chapel Hill, NC, United States
| | - Liang Xu
- Department of Molecular Biosciences, University of Kansas, Lawrence, KS, United States
| | - Michael Tranter
- Division of Cardiovascular Health and Disease, University of Cincinnati College of Medicine, Cincinnati, OH, United States.
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19
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Noh JH, Kim KM, Abdelmohsen K, Yoon JH, Panda AC, Munk R, Kim J, Curtis J, Moad CA, Wohler CM, Indig FE, de Paula W, Dudekula DB, De S, Piao Y, Yang X, Martindale JL, de Cabo R, Gorospe M. HuR and GRSF1 modulate the nuclear export and mitochondrial localization of the lncRNA RMRP. Genes Dev 2016; 30:1224-39. [PMID: 27198227 PMCID: PMC4888842 DOI: 10.1101/gad.276022.115] [Citation(s) in RCA: 143] [Impact Index Per Article: 17.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2015] [Accepted: 04/14/2016] [Indexed: 01/06/2023]
Abstract
Noh et al. found two RNA-binding proteins (RBPs)—HuR and GRSF1—that associated with the nuclear DNA-encoded lncRNA RMRP and mobilized it to mitochondria. In cultured human cells, HuR bound RMRP in the nucleus and mediated its CRM1-dependent export to the cytosol. After RMRP was imported into mitochondria, GRSF1 bound RMRP and increased its abundance in the matrix. Some mitochondrial long noncoding RNAs (lncRNAs) are encoded by nuclear DNA, but the mechanisms that mediate their transport to mitochondria are poorly characterized. Using affinity RNA pull-down followed by mass spectrometry analysis, we found two RNA-binding proteins (RBPs), HuR (human antigen R) and GRSF1 (G-rich RNA sequence-binding factor 1), that associated with the nuclear DNA-encoded lncRNA RMRP and mobilized it to mitochondria. In cultured human cells, HuR bound RMRP in the nucleus and mediated its CRM1 (chromosome region maintenance 1)-dependent export to the cytosol. After RMRP was imported into mitochondria, GRSF1 bound RMRP and increased its abundance in the matrix. Loss of GRSF1 lowered the mitochondrial levels of RMRP, in turn suppressing oxygen consumption rates and modestly reducing mitochondrial DNA replication priming. Our findings indicate that RBPs HuR and GRSF1 govern the cytoplasmic and mitochondrial localization of the lncRNA RMRP, which is encoded by nuclear DNA but has key functions in mitochondria.
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Affiliation(s)
- Ji Heon Noh
- Laboratory of Genetics, National Institute on Aging, National Institutes of Health, Baltimore, Maryland 21224, USA
| | - Kyoung Mi Kim
- Laboratory of Genetics, National Institute on Aging, National Institutes of Health, Baltimore, Maryland 21224, USA
| | - Kotb Abdelmohsen
- Laboratory of Genetics, National Institute on Aging, National Institutes of Health, Baltimore, Maryland 21224, USA
| | - Je-Hyun Yoon
- Laboratory of Genetics, National Institute on Aging, National Institutes of Health, Baltimore, Maryland 21224, USA
| | - Amaresh C Panda
- Laboratory of Genetics, National Institute on Aging, National Institutes of Health, Baltimore, Maryland 21224, USA
| | - Rachel Munk
- Laboratory of Genetics, National Institute on Aging, National Institutes of Health, Baltimore, Maryland 21224, USA
| | - Jiyoung Kim
- Laboratory of Genetics, National Institute on Aging, National Institutes of Health, Baltimore, Maryland 21224, USA
| | - Jessica Curtis
- Laboratory of Experimental Gerontology, National Institute on Aging, National Institutes of Health, Baltimore, Maryland 21224, USA
| | - Christopher A Moad
- Confocal Imaging Facility, National Institute on Aging, National Institutes of Health, Baltimore, Maryland 21224, USA
| | - Christina M Wohler
- Confocal Imaging Facility, National Institute on Aging, National Institutes of Health, Baltimore, Maryland 21224, USA
| | - Fred E Indig
- Confocal Imaging Facility, National Institute on Aging, National Institutes of Health, Baltimore, Maryland 21224, USA
| | - Wilson de Paula
- Laboratory of Genetics, National Institute on Aging, National Institutes of Health, Baltimore, Maryland 21224, USA
| | - Dawood B Dudekula
- Laboratory of Genetics, National Institute on Aging, National Institutes of Health, Baltimore, Maryland 21224, USA
| | - Supriyo De
- Laboratory of Genetics, National Institute on Aging, National Institutes of Health, Baltimore, Maryland 21224, USA
| | - Yulan Piao
- Laboratory of Genetics, National Institute on Aging, National Institutes of Health, Baltimore, Maryland 21224, USA
| | - Xiaoling Yang
- Laboratory of Genetics, National Institute on Aging, National Institutes of Health, Baltimore, Maryland 21224, USA
| | - Jennifer L Martindale
- Laboratory of Genetics, National Institute on Aging, National Institutes of Health, Baltimore, Maryland 21224, USA
| | - Rafael de Cabo
- Laboratory of Experimental Gerontology, National Institute on Aging, National Institutes of Health, Baltimore, Maryland 21224, USA
| | - Myriam Gorospe
- Laboratory of Genetics, National Institute on Aging, National Institutes of Health, Baltimore, Maryland 21224, USA
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Giridharan VV, Quevedo J, Krishnamurthy P, Thandavarayan RA. Editorial Commentary: miRNA a tiny genetic tool: Key to the puzzle of cardiovascular disease. Trends Cardiovasc Med 2016; 26:420-2. [PMID: 27079892 DOI: 10.1016/j.tcm.2016.03.007] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/07/2016] [Accepted: 03/10/2016] [Indexed: 01/22/2023]
Affiliation(s)
- Vijayasree V Giridharan
- Department of Psychiatry and Behavioral Sciences, University of Texas Health Science Center at Houston, Mc. Govern Medical School, Houston, TX
| | - Joao Quevedo
- Department of Psychiatry and Behavioral Sciences, University of Texas Health Science Center at Houston, Mc. Govern Medical School, Houston, TX
| | - Prasanna Krishnamurthy
- Department of Cardiovascular Sciences, Centre for Cardiovascular Regeneration, Houston Methodist Research Institute, Houston, TX.
| | - Rajarajan A Thandavarayan
- Department of Cardiovascular Sciences, Centre for Cardiovascular Regeneration, Houston Methodist Research Institute, Houston, TX.
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21
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Rajasingh J. The many facets of RNA-binding protein HuR. Trends Cardiovasc Med 2015; 25:684-6. [PMID: 25920625 DOI: 10.1016/j.tcm.2015.03.013] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/23/2015] [Accepted: 03/24/2015] [Indexed: 12/12/2022]
Affiliation(s)
- Johnson Rajasingh
- Division of Cardiovascular Diseases, Cardiovascular Research Institute and Department of Internal Medicine, University of Kansas Medical Center, Kansas City, KS; Department of Biochemistry and Molecular Biology, University of Kansas Medical Center, Kansas City, KS.
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