1
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Kim E, Choi S, Kim SY, Jang SJ, Lee S, Kim H, Jang JH, Seo HH, Lee JH, Choi SS, Moh SH. Wound healing effect of polydeoxyribonucleotide derived from Hibiscus sabdariffa callus via Nrf2 signaling in human keratinocytes. Biochem Biophys Res Commun 2024; 728:150335. [PMID: 38996695 DOI: 10.1016/j.bbrc.2024.150335] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2024] [Revised: 06/28/2024] [Accepted: 06/29/2024] [Indexed: 07/14/2024]
Abstract
There has been a growing interest in skin recovery in both the medical and cosmetics fields, leading to an increasing number of studies reporting diverse materials being utilized for this purpose. Among them, polydeoxyribonucleotide (PDRN) is known for its efficacy in skin repair processes, while Hibiscus sabdariffa (HS) is recognized for its antioxidant, hypolipidemic, and wound healing properties, including its positive impact on mammalian skin and cells. We hypothesized that these characteristics may have a germane relationship during the healing process. Consequently, we induced calli from HS and then extracted PDRN for use in treating human keratinocytes. PDRN (5 μg/mL) had considerable wound healing effects and wrinkle improvement effects. To confirm its function at the molecular level, we performed real-time polymerase chain reaction, western blotting, and immunocytochemistry. Furthermore, genes related to wound healing (MMP9, Nrf2, KGF, VEGF, SOD2, and AQP3) were significantly upregulated. Additionally, the protein expression of MMP9, AQP3, and CAT, which are closely related to wound healing and antioxidant cascades, was considerably enhanced. Based on cellular morphology and molecular-level evidence, we propose that PDRN from calli of HS can improve wound healing in human keratinocytes. Furthermore, its potential to serve as a novel material in cosmetic products is demonstrated.
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Affiliation(s)
- Euihyun Kim
- Plant Cell Research Institute, BIO-FD&C Co., Ltd, Yeonsu-gu, Incheon, 21990, Republic of Korea.
| | - Sunmee Choi
- Plant Cell Research Institute, BIO-FD&C Co., Ltd, Yeonsu-gu, Incheon, 21990, Republic of Korea.
| | - Soo-Yun Kim
- Plant Cell Research Institute, BIO-FD&C Co., Ltd, Yeonsu-gu, Incheon, 21990, Republic of Korea.
| | - Sung Joo Jang
- Plant Cell Research Institute, BIO-FD&C Co., Ltd, Yeonsu-gu, Incheon, 21990, Republic of Korea.
| | - Sak Lee
- Plant Cell Research Institute, BIO-FD&C Co., Ltd, Yeonsu-gu, Incheon, 21990, Republic of Korea.
| | - Hyein Kim
- Plant Cell Research Institute, BIO-FD&C Co., Ltd, Yeonsu-gu, Incheon, 21990, Republic of Korea.
| | - Ji Hyeon Jang
- Plant Cell Research Institute, BIO-FD&C Co., Ltd, Yeonsu-gu, Incheon, 21990, Republic of Korea.
| | - Hyo Hyun Seo
- Plant Cell Research Institute, BIO-FD&C Co., Ltd, Yeonsu-gu, Incheon, 21990, Republic of Korea.
| | - Jeong Hun Lee
- Plant Cell Research Institute, BIO-FD&C Co., Ltd, Yeonsu-gu, Incheon, 21990, Republic of Korea.
| | - Sung Soo Choi
- Daesang Holdings, Jung-gu, Seoul, 04513, Republic of Korea.
| | - Sang Hyun Moh
- Plant Cell Research Institute, BIO-FD&C Co., Ltd, Yeonsu-gu, Incheon, 21990, Republic of Korea.
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2
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Chen S, Zhou Y, Peng P, Xu L, Tang Q, Chen W, Gu W. SNHG15-Mediated Localization of Nucleolin at the Cell Protrusions Regulates CDH2 mRNA Expression and Cell Invasion. Int J Mol Sci 2023; 24:15600. [PMID: 37958584 PMCID: PMC10650932 DOI: 10.3390/ijms242115600] [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: 08/24/2023] [Revised: 10/15/2023] [Accepted: 10/23/2023] [Indexed: 11/15/2023] Open
Abstract
LncRNAs are emerging as important regulators of gene expression by controlling transcription in the nucleus and by modulating mRNA translation in the cytoplasm. In this study, we reveal a novel function of lncRNA SNHG15 in mediating breast cancer cell invasion through regulating the local translation of CDH2 mRNA. We show that SNHG15 preferentially localizes at the cellular protrusions or cell leading edge and that this localization is directed by IMP1, a multifunctional protein involved in many aspects of RNA regulation. We demonstrate that SNHG15 also forms a complex with nucleolin, allowing nucleolin to be co-transported with SNHG15 to the cell protrusions, where the accumulated nucleolin is able to bind to CDH2 mRNA. Interaction with nucleolin stabilizes local CDH2 mRNA and regulates its translation, thus promoting cell invasive potential. Our findings reveal an underlying mechanism by which lncRNA could serve as a carrier to transport a protein regulator into a specific cell compartment to enhance target mRNA expression.
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Affiliation(s)
| | | | | | | | | | | | - Wei Gu
- Key Immunopathology Laboratory of Guangdong Province, Department of Pathophysiology, Shantou University Medical College, Shantou 515041, China; (S.C.); (Y.Z.); (P.P.); (L.X.); (Q.T.); (W.C.)
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3
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Shieh JM, Chang TW, Wang JH, Liang SP, Kao PL, Chen LY, Yen CJ, Chen YJ, Chang WC, Chen BK. RNA-binding protein-regulated fibronectin is essential for EGFR-activated metastasis of head and neck squamous cell carcinoma. FASEB J 2023; 37:e23206. [PMID: 37718485 DOI: 10.1096/fj.202300527r] [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: 03/19/2023] [Revised: 08/24/2023] [Accepted: 09/07/2023] [Indexed: 09/19/2023]
Abstract
There is a higher expression level of epidermal growth factor receptor (EGFR) in up to 90% of advanced head and neck squamous cell carcinoma (HNSCC) tissue than in normal surrounding tissues. However, the role of RNA-binding proteins (RBPs) in EGFR-associated metastasis of HNSCC remains unclear. In this study, we reveal that RBPs, specifically nucleolin (NCL) and heterogeneous nuclear ribonucleoprotein A2/B1 (hnRNPA2B1), correlated with the mesenchymal phenotype of HNSCC. The depletion of RBPs significantly attenuated EGF-induced HNSCC metastasis. Intriguingly, the EGF-induced EMT markers, such as fibronectin, were regulated by RBPs through the ERK and NF-κB pathway, followed by the enhancement of mRNA stability of fibronectin through the 5' untranslated region (5'-UTR) of the gene. The upregulation of fibronectin triggered the integrin signaling activation to enhance tumor cells' attachment to endothelial cells and increase endothelial permeability. In addition, the concurrence of EGFR and RBPs or EGFR and fibronectin was associated with overall survival and disease-free survival of HNSCC. The in vivo study showed that depletion of NCL, hnRNPA2B1, and fibronectin significantly inhibited EGF-promoted extravasation of tumor cells into lung tissues. The depletion of fibronectin or treatment with integrin inhibitors dramatically attenuated EGF-induced HNSCC metastatic nodules in the lung. Our data suggest that the RBPs/fibronectin axis is essential for EGF-induced tumor-endothelial cell interactions to enhance HNSCC cell metastasis.
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Affiliation(s)
- Jiunn-Min Shieh
- Department of Internal Medicine, Chi-Mei Medical Center, Tainan, Taiwan, ROC
| | - Ting-Wei Chang
- Institute of Basic Medical Sciences, College of Medicine, National Cheng Kung University, Tainan, Taiwan, ROC
| | - Jing-He Wang
- Department of Pharmacology, College of Medicine, National Cheng Kung University, Tainan, Taiwan, ROC
| | - Song-Ping Liang
- Department of Pharmacology, College of Medicine, National Cheng Kung University, Tainan, Taiwan, ROC
| | - Pei-Lu Kao
- Department of Pharmacology, College of Medicine, National Cheng Kung University, Tainan, Taiwan, ROC
| | - Liang-Yi Chen
- Department of Pharmacology, College of Medicine, National Cheng Kung University, Tainan, Taiwan, ROC
| | - Chia-Jui Yen
- Department of Oncology, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan, ROC
| | - Yun-Ju Chen
- School of Medicine for International Students, I-Shou University, Kaohsiung, Taiwan, ROC
- Department of Medical Research, E-Da Hospital, Kaohsiung, Taiwan, ROC
| | - Wen-Chang Chang
- Graduate Institute of Medical Sciences, College of Medicine, Taipei Medical University, Taipei, Taiwan, ROC
| | - Ben-Kuen Chen
- Institute of Basic Medical Sciences, College of Medicine, National Cheng Kung University, Tainan, Taiwan, ROC
- Department of Pharmacology, College of Medicine, National Cheng Kung University, Tainan, Taiwan, ROC
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4
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Lee J, Kang H. Nucleolin Regulates Pulmonary Artery Smooth Muscle Cell Proliferation under Hypoxia by Modulating miRNA Expression. Cells 2023; 12:cells12050817. [PMID: 36899956 PMCID: PMC10000680 DOI: 10.3390/cells12050817] [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: 12/20/2022] [Revised: 03/03/2023] [Accepted: 03/04/2023] [Indexed: 03/09/2023] Open
Abstract
Hypoxia induces the abnormal proliferation of vascular smooth muscle cells (VSMCs), resulting in the pathogenesis of various vascular diseases. RNA-binding proteins (RBPs) are involved in a wide range of biological processes, including cell proliferation and responses to hypoxia. In this study, we observed that the RBP nucleolin (NCL) was downregulated by histone deacetylation in response to hypoxia. We evaluated its regulatory effects on miRNA expression under hypoxic conditions in pulmonary artery smooth muscle cells (PASMCs). miRNAs associated with NCL were assessed using RNA immunoprecipitation in PASMCs and small RNA sequencing. The expression of a set of miRNAs was increased by NCL but reduced by hypoxia-induced downregulation of NCL. The downregulation of miR-24-3p and miR-409-3p promoted PASMC proliferation under hypoxic conditions. These results clearly demonstrate the significance of NCL-miRNA interactions in the regulation of hypoxia-induced PASMC proliferation and provide insight into the therapeutic value of RBPs for vascular diseases.
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Affiliation(s)
- Jihui Lee
- Division of Life Sciences, College of Life Sciences and Bioengineering, Incheon National University, Incheon 22012, Republic of Korea
| | - Hara Kang
- Division of Life Sciences, College of Life Sciences and Bioengineering, Incheon National University, Incheon 22012, Republic of Korea
- Institute for New Drug Development, Incheon National University, Incheon 22012, Republic of Korea
- Correspondence: ; Tel.: +82-32-835-8238; Fax: +82-32-835-0763
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5
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Dash S, Trainor PA. Nucleolin loss of function leads to aberrant Fibroblast Growth Factor signaling and craniofacial anomalies. Development 2022; 149:dev200349. [PMID: 35762670 PMCID: PMC9270975 DOI: 10.1242/dev.200349] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2021] [Accepted: 04/25/2022] [Indexed: 11/23/2022]
Abstract
Ribosomal RNA (rRNA) transcription and ribosome biogenesis are global processes required for growth and proliferation of all cells, yet perturbation of these processes in vertebrates leads to tissue-specific defects termed ribosomopathies. Mutations in rRNA transcription and processing proteins often lead to craniofacial anomalies; however, the cellular and molecular reasons for these defects are poorly understood. Therefore, we examined the function of the most abundant nucleolar phosphoprotein, Nucleolin (Ncl), in vertebrate development. ncl mutant (ncl-/-) zebrafish present with craniofacial anomalies such as mandibulofacial hypoplasia. We observed that ncl-/- mutants exhibited decreased rRNA synthesis and p53-dependent apoptosis, consistent with a role in ribosome biogenesis. However, we found that Nucleolin also performs functions not associated with ribosome biogenesis. We discovered that the half-life of fgf8a mRNA was reduced in ncl-/- mutants, which perturbed Fgf signaling, resulting in misregulated Sox9a-mediated chondrogenesis and Runx2-mediated osteogenesis. Consistent with this model, exogenous FGF8 treatment significantly rescued the cranioskeletal phenotype in ncl-/- zebrafish, suggesting that Nucleolin regulates osteochondroprogenitor differentiation. Our work has therefore uncovered tissue-specific functions for Nucleolin in rRNA transcription and post-transcriptional regulation of growth factor signaling during embryonic craniofacial development.
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Affiliation(s)
- Soma Dash
- Stowers Institute for Medical Research, Kansas City, MO 64110, USA
| | - Paul A. Trainor
- Stowers Institute for Medical Research, Kansas City, MO 64110, USA
- Department of Anatomy and Cell Biology, University of Kansas Medical Center, Kansas City, KS 66160, USA
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6
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Qi D, Liu Y, Li J, Huang JH, Hu X, Wu E. Salinomycin as a potent anticancer stem cell agent: State of the art and future directions. Med Res Rev 2021; 42:1037-1063. [PMID: 34786735 PMCID: PMC9298915 DOI: 10.1002/med.21870] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2021] [Revised: 10/22/2021] [Accepted: 10/26/2021] [Indexed: 12/11/2022]
Abstract
Cancer stem cells (CSCs) are a small subpopulation of cells within a tumor that can both self‐renew and differentiate into other cell types forming the heterogeneous tumor bulk. Since CSCs are involved in all aspects of cancer development, including tumor initiation, cell proliferation, metastatic dissemination, therapy resistance, and recurrence, they have emerged as attractive targets for cancer treatment and management. Salinomycin, a widely used antibiotic in poultry farming, was identified by the Weinberg group as a potent anti‐CSC agent in 2009. As a polyether ionophore, salinomycin exerts broad‐spectrum activities, including the important anti‐CSC function. Studies on the mechanism of action of salinomycin against cancer have been continuously and rapidly published since then. Thus, it is imperative for us to update its literature of recent research findings in this area. We here summarize the notable work reported on salinomycin's anticancer activities, intracellular binding target(s), effects on tumor microenvironment, safety, derivatives, and tumor‐specific drug delivery; after that we also discuss the translational potential of salinomycin toward clinical application based on current multifaceted understandings.
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Affiliation(s)
- Dan Qi
- Department of Neurosurgery, Baylor Scott & White Health, Temple, Texas, USA.,Neuroscience Institute, Baylor Scott & White Health, Temple, Texas, USA
| | - Yunyi Liu
- Molecular Science and Biomedicine Laboratory, State Key Laboratory for Chemo/Biosensing and Chemometrics, College of Biology, College of Chemistry and Chemical Engineering, Collaborative Innovation Center for Molecular Engineering for Theranostics, Hunan University, Changsha, China
| | - Juan Li
- Molecular Science and Biomedicine Laboratory, State Key Laboratory for Chemo/Biosensing and Chemometrics, College of Biology, College of Chemistry and Chemical Engineering, Collaborative Innovation Center for Molecular Engineering for Theranostics, Hunan University, Changsha, China
| | - Jason H Huang
- Department of Neurosurgery, Baylor Scott & White Health, Temple, Texas, USA.,Neuroscience Institute, Baylor Scott & White Health, Temple, Texas, USA.,Department of Surgery, Texas A&M University College of Medicine, Temple, Texas, USA
| | - Xiaoxiao Hu
- Molecular Science and Biomedicine Laboratory, State Key Laboratory for Chemo/Biosensing and Chemometrics, College of Biology, College of Chemistry and Chemical Engineering, Collaborative Innovation Center for Molecular Engineering for Theranostics, Hunan University, Changsha, China.,Shenzhen Research Institute, Hunan University, Shenzhen, Guangdong, China
| | - Erxi Wu
- Department of Neurosurgery, Baylor Scott & White Health, Temple, Texas, USA.,Neuroscience Institute, Baylor Scott & White Health, Temple, Texas, USA.,Department of Surgery, Texas A&M University College of Medicine, Temple, Texas, USA.,LIVESTRONG Cancer Institutes and Department of Oncology, Dell Medical School, The University of Texas at Austin, Austin, Texas, USA.,Department of Pharmaceutical Sciences, Texas A&M University College of Pharmacy, College Station, Texas, USA
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7
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Iturriaga-Goyon E, Buentello-Volante B, Magaña-Guerrero FS, Garfias Y. Future Perspectives of Therapeutic, Diagnostic and Prognostic Aptamers in Eye Pathological Angiogenesis. Cells 2021; 10:cells10061455. [PMID: 34200613 PMCID: PMC8227682 DOI: 10.3390/cells10061455] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2021] [Revised: 06/04/2021] [Accepted: 06/05/2021] [Indexed: 12/23/2022] Open
Abstract
Aptamers are single-stranded DNA or RNA oligonucleotides that are currently used in clinical trials due to their selectivity and specificity to bind small molecules such as proteins, peptides, viral particles, vitamins, metal ions and even whole cells. Aptamers are highly specific to their targets, they are smaller than antibodies and fragment antibodies, they can be easily conjugated to multiple surfaces and ions and controllable post-production modifications can be performed. Aptamers have been therapeutically used for age-related macular degeneration, cancer, thrombosis and inflammatory diseases. The aim of this review is to highlight the therapeutic, diagnostic and prognostic possibilities associated with aptamers, focusing on eye pathological angiogenesis.
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Affiliation(s)
- Emilio Iturriaga-Goyon
- MD/PhD (PECEM) Program, Facultad de Medicina, Universidad Nacional Autónoma de México, Mexico City 04510, Mexico;
- Cell and Tissue Biology, Research Unit, Institute of Ophthalmology, Conde de Valenciana, Chimalpopoca 14, Mexico City 06800, Mexico; (B.B.-V.); (F.S.M.-G.)
- Department of Biochemistry, Facultad de Medicina, Universidad Nacional Autónoma de México, Av. Universidad 3000, Mexico City 04510, Mexico
| | - Beatriz Buentello-Volante
- Cell and Tissue Biology, Research Unit, Institute of Ophthalmology, Conde de Valenciana, Chimalpopoca 14, Mexico City 06800, Mexico; (B.B.-V.); (F.S.M.-G.)
| | - Fátima Sofía Magaña-Guerrero
- Cell and Tissue Biology, Research Unit, Institute of Ophthalmology, Conde de Valenciana, Chimalpopoca 14, Mexico City 06800, Mexico; (B.B.-V.); (F.S.M.-G.)
| | - Yonathan Garfias
- Cell and Tissue Biology, Research Unit, Institute of Ophthalmology, Conde de Valenciana, Chimalpopoca 14, Mexico City 06800, Mexico; (B.B.-V.); (F.S.M.-G.)
- Department of Biochemistry, Facultad de Medicina, Universidad Nacional Autónoma de México, Av. Universidad 3000, Mexico City 04510, Mexico
- Correspondence:
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8
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Das S, De S, Sengupta S. Post-transcriptional regulation of MMP2 mRNA by its interaction with miR-20a and Nucleolin in breast cancer cell lines. Mol Biol Rep 2021; 48:2315-2324. [PMID: 33788053 DOI: 10.1007/s11033-021-06261-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2019] [Accepted: 03/03/2021] [Indexed: 11/25/2022]
Abstract
Matrix-metalloproteinase-2 (MMP2) is a foremost MMP, governing invasion of breast cancer cells during metastasis. miR-20a was reported to induce mesenchymal to epithelial transition in MDA-MB-231 cells and its endogenous expression varies directly with invasiveness of breast cancer cells. The inverse and direct correlation of invasiveness with miR-20a and Nucleolin respectively led us to study the post-transcriptional regulation of MMP2 by miR-20a and mRNA stabilizing protein, Nucleolin. Thus, understanding the mechanism of its regulation will enable modification of the invasion potential. MMP2 was found to be higher in MDA-MB-231 than MCF-7 cells both at RNA and protein levels. RNA-protein co-immunoprecipitation assay with Argonaute 2 revealed that MMP2 undergoes miRNA-mediated post-transcriptional regulation. miR-20a decreased MMP2 expression as well as its enzymatic activity as found by zymogram assay. Reporter assay showed that miR-20a directly binds to its putative binding site in MMP2 3'-UTR as per in silico prediction. miR-20a additionally impeded MMP2 mRNA stability, and binding of stabilizing trans-factor Nucleolin to its 3'-UTR was confirmed by RNA-protein co-immunoprecipitation assay. Partial down-regulation of Nucleolin by Si-RNA resulted in the downregulation of MMP2 and Nucleolin over-expression rescued the inhibitory effect of miR-20a on MMP2 expression. Delineating the mechanism of post-transcriptional regulation of MMP2, two of its potent regulators, miR-20a and Nucleolin were identified. It was established for the first time that MMP2 is a direct target of miR-20a. The results also elucidated that Nucleolin binds to MMP2 3' UTR and its abundance affects MMP2 expression.
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Affiliation(s)
- Sayantani Das
- Department of Biophysics, Molecular Biology and Bioinformatics, University of Calcutta, 92 A.P.C. Road, Kolkata, 700009, India
| | - Soumasree De
- Department of Biophysics, Molecular Biology and Bioinformatics, University of Calcutta, 92 A.P.C. Road, Kolkata, 700009, India
| | - Sumita Sengupta
- Department of Biophysics, Molecular Biology and Bioinformatics, University of Calcutta, 92 A.P.C. Road, Kolkata, 700009, India.
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9
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Wallace GQ, Masson JF. From single cells to complex tissues in applications of surface-enhanced Raman scattering. Analyst 2020; 145:7162-7185. [DOI: 10.1039/d0an01274b] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
This tutorial review explores how three of the most common methods for introducing nanoparticles to single cells for surface-enhanced Raman scattering measurements can be adapted for experiments with complex tissues.
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Affiliation(s)
- Gregory Q. Wallace
- Département de Chimie
- Centre Québécois des Matériaux Fonctionnels (CQMF)
- and Regroupement Québécois des Matériaux de Pointe (RQMP)
- Université de Montréal
- Montréal
| | - Jean-François Masson
- Département de Chimie
- Centre Québécois des Matériaux Fonctionnels (CQMF)
- and Regroupement Québécois des Matériaux de Pointe (RQMP)
- Université de Montréal
- Montréal
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10
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Post-Translational Modification-Dependent Activity of Matrix Metalloproteinases. Int J Mol Sci 2019; 20:ijms20123077. [PMID: 31238509 PMCID: PMC6627178 DOI: 10.3390/ijms20123077] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2019] [Revised: 06/16/2019] [Accepted: 06/18/2019] [Indexed: 12/18/2022] Open
Abstract
Due to their capacity to process different proteins of the extracellular matrix (ECM), matrix metalloproteinases (MMPs) were initially described as a family of secreted proteases, functioning as main ECM regulators. However, through proteolytic processing of various biomolecules, MMPs also modulate intra- and extracellular pathways and networks. Thereby, they are functionally implicated in the regulation of multiple physiological and pathological processes. Consequently, MMP activity is tightly regulated through a combination of epigenetic, transcriptional, and post-transcriptional control of gene expression, proteolytic activation, post-translational modifications (PTMs), and extracellular inhibition. In addition, MMPs, their substrates and ECM binding partners are frequently modified by PTMs, which suggests an important role of PTMs in modulating the pleiotropic activities of these proteases. This review summarizes the recent progress towards understanding the role of PTMs (glycosylation, phosphorylation, glycosaminoglycans) on the activity of several members of the MMP family.
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11
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Zou J, Wang N, Liu M, Bai Y, Wang H, Liu K, Zhang H, Xiao X, Wang K. Nucleolin mediated pro-angiogenic role of Hydroxysafflor Yellow A in ischaemic cardiac dysfunction: Post-transcriptional regulation of VEGF-A and MMP-9. J Cell Mol Med 2018; 22:2692-2705. [PMID: 29512890 PMCID: PMC5908102 DOI: 10.1111/jcmm.13552] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2017] [Accepted: 01/02/2018] [Indexed: 01/22/2023] Open
Abstract
Hydroxysafflor Yellow A (HSYA), a most representative ingredient of Carthamus tinctorius L., had long been used in treating ischaemic cardiovascular diseases in China and exhibited prominently anticoagulant and pro-angiogenic activities, but the underlying mechanisms remained largely unknown. This study aimed to further elucidate the pro-angiogenic effect and mechanism of HSYA on ischaemic cardiac dysfunction. A C57 mouse model of acute myocardial infarction (AMI) was firstly established, and 25 mg/kg HSYA was intraperitoneally injected immediately after operation and given once, respectively, each morning and evening for 2 weeks. It was found that HSYA significantly improved ischaemia-induced cardiac haemodynamics, enhanced the survival rate, alleviated the myocardial injury and increased the expressions of CD31, vascular endothelial growth factor-A (VEGF-A) and nucleolin in the ischaemic myocardium. In addition, HSYA promoted the migration and tube formation of human umbilical vein endothelial cells (HUVECs), enhanced the expressions of nucleolin, VEGF-A and matrix metalloproteinase-9 (MMP-9) in a dose- and time-dependent manner. However, down-regulation of nucleolin expression sharply abrogated the effect mentioned above of HSYA. Further protein-RNA coimmunoprecipitation and immunoprecipitation-RT-PCR assay showed that nucleolin binded to VEGF-A and MMP-9 mRNA and overexpression of nucleolin up-regulated the mRNA expressions of VEGF-A and MMP-9 in the HUVECs through enhancing the stability of VEGF-A and MMP-9 mRNA. Furthermore, HSYA increased the mRNA expressions of VEGF-A and MMP-9 in the extract of antinucleolin antibody-precipitated protein from the heart of AMI mice. Our data revealed that nucleolin mediated the pro-angiogenic effect of HSYA through post-transcriptional regulation of VEGF-A and MMP-9 expression, which contributed to the protective effect of HSYA on ischaemic cardiac dysfunction.
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Affiliation(s)
- Jiang Zou
- Department of PathophysiologyXiangya School of MedicineCentral South UniversityChangshaChina
- Translational Medicine Center of SepsisKey Lab of Hunan ProvinceCentral South UniversityChangshaChina
| | - Nian Wang
- Department of PathophysiologyXiangya School of MedicineCentral South UniversityChangshaChina
- Translational Medicine Center of SepsisKey Lab of Hunan ProvinceCentral South UniversityChangshaChina
| | - Manting Liu
- Department of PathophysiologyXiangya School of MedicineCentral South UniversityChangshaChina
- Translational Medicine Center of SepsisKey Lab of Hunan ProvinceCentral South UniversityChangshaChina
| | - Yongping Bai
- Department of Geriatric MedicineXiangya HospitalCentral South UniversityChangshaChina
| | - Hao Wang
- Department of PathophysiologyXiangya School of MedicineCentral South UniversityChangshaChina
- Translational Medicine Center of SepsisKey Lab of Hunan ProvinceCentral South UniversityChangshaChina
| | - Ke Liu
- Department of PathophysiologyXiangya School of MedicineCentral South UniversityChangshaChina
- Translational Medicine Center of SepsisKey Lab of Hunan ProvinceCentral South UniversityChangshaChina
| | - Huali Zhang
- Department of PathophysiologyXiangya School of MedicineCentral South UniversityChangshaChina
- Translational Medicine Center of SepsisKey Lab of Hunan ProvinceCentral South UniversityChangshaChina
| | - Xianzhong Xiao
- Department of PathophysiologyXiangya School of MedicineCentral South UniversityChangshaChina
- Translational Medicine Center of SepsisKey Lab of Hunan ProvinceCentral South UniversityChangshaChina
| | - Kangkai Wang
- Department of PathophysiologyXiangya School of MedicineCentral South UniversityChangshaChina
- Translational Medicine Center of SepsisKey Lab of Hunan ProvinceCentral South UniversityChangshaChina
- Department of Laboratory AnimalsXiangya School of MedicineCentral South UniversityChangshaChina
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12
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Gregório AC, Lacerda M, Figueiredo P, Simões S, Dias S, Moreira JN. Meeting the needs of breast cancer: A nucleolin's perspective. Crit Rev Oncol Hematol 2018; 125:89-101. [PMID: 29650282 DOI: 10.1016/j.critrevonc.2018.03.008] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2017] [Revised: 01/30/2018] [Accepted: 03/20/2018] [Indexed: 12/21/2022] Open
Abstract
A major challenge in the management of breast cancer disease has been the development of metastases. Finding new molecular targets and the design of targeted therapeutic approaches to improve the overall survival and quality of life of these patients is, therefore, of great importance. Nucleolin, which is overexpressed in cancer cells and tumor-associated blood vessels, have been implicated in various processes supporting tumorigenesis and angiogenesis. Additionally, its overexpression has been demonstrated in a variety of human neoplasias as an unfavorable prognostic factor, associated with a high risk of relapse and low overall survival. Hence, nucleolin has emerged as a relevant target for therapeutic intervention in cancer malignancy, including breast cancer. This review focus on the contribution of nucleolin for cancer disease and on the development of therapeutic strategies targeting this protein. In this respect, it also provides a critical analysis about the potential and pitfalls of nanomedicine for cancer therapy.
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Affiliation(s)
- Ana C Gregório
- CNC - Center for Neurosciences and Cell Biology, University of Coimbra, 3004-504 Coimbra, Portugal; IIIUC - Institute for Interdisciplinary Research, University of Coimbra, 3030-789 Coimbra, Portugal
| | - Manuela Lacerda
- IPATIMUP - Institute of Molecular Pathology and Immunology, University of Porto, 4200-465 Porto, Portugal
| | - Paulo Figueiredo
- IPOFG-EPE - Portuguese Institute of Oncology Francisco Gentil, 3000-075 Coimbra, Portugal
| | - Sérgio Simões
- CNC - Center for Neurosciences and Cell Biology, University of Coimbra, 3004-504 Coimbra, Portugal; FFUC - Faculty of Pharmacy, Pólo das Ciências da Saúde, University of Coimbra, 3000-354 Coimbra, Portugal
| | - Sérgio Dias
- IMM - Institute of Molecular Medicine, Faculty of Medicine, University of Lisbon, 1649-028 Lisbon, Portugal
| | - João Nuno Moreira
- CNC - Center for Neurosciences and Cell Biology, University of Coimbra, 3004-504 Coimbra, Portugal; FFUC - Faculty of Pharmacy, Pólo das Ciências da Saúde, University of Coimbra, 3000-354 Coimbra, Portugal.
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13
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Tao B, Wang R, Sun C, Zhu Y. 3-Mercaptopyruvate Sulfurtransferase, Not Cystathionine β-Synthase Nor Cystathionine γ-Lyase, Mediates Hypoxia-Induced Migration of Vascular Endothelial Cells. Front Pharmacol 2017; 8:657. [PMID: 28979207 PMCID: PMC5611563 DOI: 10.3389/fphar.2017.00657] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2017] [Accepted: 09/04/2017] [Indexed: 01/06/2023] Open
Abstract
Hypoxia-induced angiogenesis is a common phenomenon in many physiological and patho-physiological processes. However, the potential differential roles of three hydrogen sulfide producing systems cystathionine γ-lyase (CSE)/H2S, cystathionine β-synthase (CBS)/H2S, and 3-mercaptopyruvate sulfurtransferase (MPST)/H2S in hypoxia-induced angiogenesis are still unknown. We found that minor hypoxia (10% oxygen) significantly increased the migration of vascular endothelial cells while hypoxia (8% oxygen) significantly inhibited cell migration. The present study was performed using cells cultured in 10% oxygen. RNA interference was used to block the endogenous generation of hydrogen sulfide by CSE, CBS, or MPST in a vascular endothelial cell migration model in both normoxia and hypoxia. The results showed that CBS had a promoting effect on the migration of vascular endothelial cells cultured in both normoxic and hypoxic conditions. In contrast, CSE had an inhibitory effect on cell migration. MPST had a promoting effect on the migration of vascular endothelial cells cultured in hypoxia; however, it had no effect on the cells cultured in normoxia. Importantly, it was found that the hypoxia-induced increase in vascular endothelial cell migration was mediated by MPST, but not CSE or CBS. The western blot analyses showed that hypoxia significantly increased MPST protein levels, decreased CSE protein levels and did not change CBS levels, suggesting that these three hydrogen sulfide-producing systems respond differently to hypoxic conditions. Interestingly, MPST protein levels were elevated by hypoxia in a bi-phasic manner and MPST mRNA levels increased later than the first stage elevation of the protein levels, implying that the expression of MPST induced by hypoxia was also regulated at a post-transcriptional level. RNA pull-down assay showed that some candidate RNA binding proteins, such as nucleolin and Annexin A2, were dissociated from the 3'-UTR of MPST mRNA in hypoxia which implied their involvement in MPST mRNA regulation.
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Affiliation(s)
- Beibei Tao
- Shanghai Key Laboratory of Bioactive Small Molecules and Research Center on Aging and Medicine, Department of Physiology and Pathophysiology, Fudan University Shanghai Medical CollegeShanghai, China
| | - Rui Wang
- Shanghai Key Laboratory of Bioactive Small Molecules and Research Center on Aging and Medicine, Department of Physiology and Pathophysiology, Fudan University Shanghai Medical CollegeShanghai, China
| | - Chen Sun
- Shanghai Key Laboratory of Bioactive Small Molecules and Research Center on Aging and Medicine, Department of Physiology and Pathophysiology, Fudan University Shanghai Medical CollegeShanghai, China
| | - Yichun Zhu
- Shanghai Key Laboratory of Bioactive Small Molecules and Research Center on Aging and Medicine, Department of Physiology and Pathophysiology, Fudan University Shanghai Medical CollegeShanghai, China
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14
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Hanif S, Liu HL, Ahmed SA, Yang JM, Zhou Y, Pang J, Ji LN, Xia XH, Wang K. Nanopipette-Based SERS Aptasensor for Subcellular Localization of Cancer Biomarker in Single Cells. Anal Chem 2017; 89:9911-9917. [PMID: 28825473 DOI: 10.1021/acs.analchem.7b02147] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Single cell analysis is essential for understanding the heterogeneity, behaviors of cells, and diversity of target analyte in different subcellular regions. Nucleolin (NCL) is a multifunctional protein that is markedly overexpressed in most of the cancer cells. The variant expression levels of NCL in subcellular regions have a marked influence on cancer proliferation and treatments. However, the specificity of available methods to identify the cancer biomarkers is limited because of the high level of subcellular matrix effect. Herein, we proposed a novel technique to increase both the molecular and spectral specificity of cancer diagnosis by using aptamers affinity based portable nanopipette with distinctive surface-enhanced Raman scattering (SERS) activities. The aptamers-functionalized gold-coated nanopipette was used to capture target, while p-mercaptobenzonitrile (MBN) and complementary DNA modified Ag nanoparticles (AgNPs) worked as Raman reporter to produce SERS signal. The SERS signal of Raman nanotag was lost upon NCL capturing via modified DNA aptamers on nanoprobe, which further helped to verify the specificity of nanoprobe. For proof of concept, NCL protein was specifically extracted from different cell lines by aptamers modified SERS active nanoprobe. The nanoprobes manifested specifically good affinity for NCL with a dissociation constant Kd of 36 nM and provided a 1000-fold higher specificity against other competing proteins. Furthermore, the Raman reporter moiety has a vibrational frequency in the spectroscopically silent region (1800-2300 cm-1) with a negligible matrix effect from cell analysis. The subcellular localization and spatial distribution of NCL were successfully achieved in various types of cells, including MCF-7A, HeLa, and MCF-10A cells. This type of probing technique for single cell analysis could lead to the development of a new perspective in cancer diagnosis and treatment at the cellular level.
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Affiliation(s)
- Sumaira Hanif
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, and ‡State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University , Nanjing 210023, China
| | - Hai-Ling Liu
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, and ‡State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University , Nanjing 210023, China
| | - Saud Asif Ahmed
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, and ‡State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University , Nanjing 210023, China
| | - Jin-Mei Yang
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, and ‡State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University , Nanjing 210023, China
| | - Yue Zhou
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, and ‡State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University , Nanjing 210023, China
| | - Jie Pang
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, and ‡State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University , Nanjing 210023, China
| | - Li-Na Ji
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, and ‡State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University , Nanjing 210023, China
| | - Xing-Hua Xia
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, and ‡State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University , Nanjing 210023, China
| | - Kang Wang
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, and ‡State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University , Nanjing 210023, China
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15
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Nüße J, Mirastschijski U, Waespy M, Oetjen J, Brandes N, Rebello O, Paroni F, Kelm S, Dietz F. Two new isoforms of the human hepatoma-derived growth factor interact with components of the cytoskeleton. Biol Chem 2016; 397:417-36. [PMID: 26845719 DOI: 10.1515/hsz-2015-0273] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2015] [Accepted: 01/28/2016] [Indexed: 01/27/2023]
Abstract
Hepatoma-derived growth factor (HDGF) is involved in diverse, apparently unrelated processes, such as cell proliferation, apoptosis, DNA-repair, transcriptional control, ribosome biogenesis and cell migration. Most of the interactions of HDGF with diverse molecules has been assigned to the hath region of HDGF. In this study we describe two previously unknown HDGF isoforms, HDGF-B and HDGF-C, generated via alternative splicing with structurally unrelated N-terminal regions of their hath region, which is clearly different from the well described isoform, HDGF-A. In silico modeling revealed striking differences near the PHWP motif, an essential part of the binding site for glycosaminoglycans and DNA/RNA. This observation prompted the hypothesis that these isoforms would have distinct interaction patterns with correspondingly diverse roles on cellular processes. Indeed, we discovered specific associations of HDGF-B and HDGF-C with cytoskeleton elements, such as tubulin and dynein, suggesting previously unknown functions of HDGF in retrograde transport, site directed localization and/or cytoskeleton organization. In contrast, the main isoform HDGF-A does not interact directly with the cytoskeleton, but via RNA with messenger ribonucleoprotein (mRNP) complexes. In summary, the discovery of HDGF splice variants with their discrete binding activities and subcellular distributions opened new avenues for understanding its biological function and importance.
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Navratilova Z, Novosadova E, Hagemann-Jensen M, Kullberg S, Kolek V, Grunewald J, Petrek M. Expression Profile of Six RNA-Binding Proteins in Pulmonary Sarcoidosis. PLoS One 2016; 11:e0161669. [PMID: 27575817 PMCID: PMC5004853 DOI: 10.1371/journal.pone.0161669] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2016] [Accepted: 07/26/2016] [Indexed: 11/23/2022] Open
Abstract
BACKGROUND Sarcoidosis is characterised by up-regulation of cytokines and chemokine ligands/receptors and proteolytic enzymes. This pro-inflammatory profile is regulated post-transcriptionally by RNA-binding proteins (RBPs). We investigated in vivo expression of six RBPs (AUF1, HuR, NCL, TIA, TIAR, PCBP2) and two inhibitors of proteolytic enzymes (RECK, PTEN) in pulmonary sarcoidosis and compared it to the expression in four control groups of healthy individuals and patients with other respiratory diseases: chronic obstructive pulmonary disease (COPD), asthma and idiopathic interstitial pneumonias (IIPs). METHODS RT-PCR was used to quantify the mRNAs in bronchoalveolar (BA) cells obtained from 50 sarcoidosis patients, 23 healthy controls, 30 COPD, 19 asthmatic and 19 IIPs patients. Flow cytometry was used to assess intracellular protein expression of AUF1 and HuR in peripheral blood T lymphocytes (PBTLs) obtained from 9 sarcoidosis patients and 6 healthy controls. RESULTS Taking the stringent conditions for multiple comparisons into consideration, we consistently observed in the primary analysis including all patients regardless of smoking status as well as in the subsequent sub-analysis limited for never smokers that the BA mRNA expression of AUF1 (p<0.001), TIA (p<0.001), NCL (p<0.01) and RECK (p<0.05) was decreased in sarcoidosis compared to healthy controls. TIA mRNA was also decreased in sarcoidosis compared to both obstructive pulmonary diseases (COPD and asthma; p<0.001) but not compared to IIPs. There were several positive correlations between RECK mRNA and RBP mRNAs in BA cells. Also sarcoidosis CD3+, CD4+ and CD8+ PBTLs displayed lower mean fluorescence intensity of AUF1 (p≤0.02) and HuR (p≤0.03) proteins than control healthy PBTLs. CONCLUSION mRNA expressions of three RBPs (AUF1, TIA and NCL) and their potential target mRNA encoding RECK in BA cells and additionally protein expression of AUF1 and HuR in PBTLs were down-regulated in our sarcoidosis patients compared to healthy individuals. Its significance, e.g. for stability of mRNAs encoding pro-inflammatory factors, should be further explored in sarcoidosis.
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Affiliation(s)
- Zdenka Navratilova
- Laboratory of Immunogenomics and Immunoproteomics, Department of Pathological Physiology, Faculty of Medicine and Dentistry Palacky University, Olomouc, Czech Republic
- Respiratory Medicine Unit, Department of Medicine, Karolinska Institutet, Stockholm, Sweden
- Institute of Molecular and Translational Medicine, Faculty of Medicine and Dentistry, Palacky University, Olomouc, Czech Republic
| | - Eva Novosadova
- Laboratory of Immunogenomics and Immunoproteomics, Department of Pathological Physiology, Faculty of Medicine and Dentistry Palacky University, Olomouc, Czech Republic
| | - Michael Hagemann-Jensen
- Respiratory Medicine Unit, Department of Medicine, Solna & Center for Molecular Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Susanna Kullberg
- Respiratory Medicine Unit, Department of Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Vitezslav Kolek
- Department of Respiratory Medicine, Palacky University, Olomouc, Czech Republic
| | - Johan Grunewald
- Respiratory Medicine Unit, Department of Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Martin Petrek
- Laboratory of Immunogenomics and Immunoproteomics, Department of Pathological Physiology, Faculty of Medicine and Dentistry Palacky University, Olomouc, Czech Republic
- Institute of Molecular and Translational Medicine, Faculty of Medicine and Dentistry, Palacky University, Olomouc, Czech Republic
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17
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Olfert IM, Baum O, Hellsten Y, Egginton S. Advances and challenges in skeletal muscle angiogenesis. Am J Physiol Heart Circ Physiol 2015; 310:H326-36. [PMID: 26608338 PMCID: PMC4796623 DOI: 10.1152/ajpheart.00635.2015] [Citation(s) in RCA: 113] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/13/2015] [Accepted: 11/18/2015] [Indexed: 12/25/2022]
Abstract
The role of capillaries is to serve as the interface for delivery of oxygen and removal of metabolites to/from tissues. During the past decade there has been a proliferation of studies that have advanced our understanding of angiogenesis, demonstrating that tissue capillary supply is under strict control during health but poorly controlled in disease, resulting in either excessive capillary growth (pathological angiogenesis) or losses in capillarity (rarefaction). Given that skeletal muscle comprises nearly 40% of body mass in humans, skeletal muscle capillary density has a significant impact on metabolism, endocrine function, and locomotion and is tightly regulated at many different levels. Skeletal muscle is also high adaptable and thus one of the few organ systems that can be experimentally manipulated (e.g., by exercise) to study physiological regulation of angiogenesis. This review will focus on the methodological concerns that have arisen in determining skeletal muscle capillarity and highlight the concepts that are reshaping our understanding of the angio-adaptation process. We also summarize selected new findings (physical influences, molecular changes, and ultrastructural rearrangement of capillaries) that identify areas of future research with the greatest potential to expand our understanding of how angiogenesis is normally regulated, and that may also help to better understand conditions of uncontrolled (pathological) angiogenesis.
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Affiliation(s)
- I Mark Olfert
- Center for Cardiovascular and Respiratory Sciences and Division of Exercise Physiology, West Virginia University School of Medicine, Morgantown, West Virginia;
| | - Oliver Baum
- Institute of Anatomy, University of Bern, Bern, Switzerland
| | - Ylva Hellsten
- Integrative Physiology Group, Department of Nutrition, Exercise and Sports, University of Copenhagen, Copenhagen, Denmark; and
| | - Stuart Egginton
- School of Biomedical Sciences, University of Leeds, Leeds, United Kingdom
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18
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Jiang B, Li Y, Liang P, Liu Y, Huang X, Tong Z, Zhang P, Huang X, Liu Y, Liu Z. Nucleolin enhances the proliferation and migration of heat-denatured human dermal fibroblasts. Wound Repair Regen 2015; 23:807-18. [PMID: 26148015 DOI: 10.1111/wrr.12339] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2015] [Accepted: 06/15/2015] [Indexed: 01/24/2023]
Abstract
Denatured dermis, a part of dermis in burned skin, has the ability to restore its normal morphology and functions after their surrounding microenvironment is improved. However, the cellular and molecular mechanisms by which the denatured dermis could improve wound healing are still unclear. This study aimed to investigate the role of nucleolin during the recovery of heat-denatured human dermal fibroblasts. Nucleolin mRNA and protein expression were significantly increased time-dependently during the recovery of heat-denatured human dermal fibroblasts (52 °C, 30 seconds). Heat-denaturation promoted a time-dependent cell proliferation, migration, chemotaxis, and scratched wound healing during the recovery of human dermal fibroblasts. These effects were prevented by knockdown of nucleolin expression with small interference RNA (siRNA), whereas overexpression of nucleolin enhanced cell proliferation, migration, and chemotaxis of human dermal fibroblasts with heat-denaturation. In addition, the expression of transforming growth factor-beta 1(TGF-β1) was significantly increased during the recovery of heat-denatured dermis and human dermal fibroblasts. TGF-β1 expression was up-regulated by nucleolin in human dermal fibroblasts. The results suggest that nucleolin expression is up-regulated, and play an important role in promoting cell proliferation, migration, and chemotaxis of human dermal fibroblasts during the recovery of heat-denatured dermis with a mechanism probably related to TGF-β1.
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Affiliation(s)
- Bimei Jiang
- Department of Pathophysiology, Xiangya School of Medicine, Central South University, Changsha, Hunan, 410008, People's Republic of China
| | - Yuanbin Li
- Department of Pathophysiology, Xiangya School of Medicine, Central South University, Changsha, Hunan, 410008, People's Republic of China
| | - Pengfei Liang
- Department of Burns and Plastic Surgery, Xiangya Hospital, Central South University, Changsha, Hunan, People's Republic of China
| | - Yanjuan Liu
- Department of Pathophysiology, Xiangya School of Medicine, Central South University, Changsha, Hunan, 410008, People's Republic of China
| | - Xu Huang
- Department of Burns and Plastic Surgery, Xiangya Hospital, Central South University, Changsha, Hunan, People's Republic of China
| | - Zhongyi Tong
- Department of Pathophysiology, Xiangya School of Medicine, Central South University, Changsha, Hunan, 410008, People's Republic of China
| | - Pihong Zhang
- Department of Burns and Plastic Surgery, Xiangya Hospital, Central South University, Changsha, Hunan, People's Republic of China
| | - Xiaoyuan Huang
- Department of Burns and Plastic Surgery, Xiangya Hospital, Central South University, Changsha, Hunan, People's Republic of China
| | - Ying Liu
- Dorothy M. Davis Heart and Lung Research Institute, Division of Cardiovascular Medicine, Department of Internal Medicine, The Ohio State University Wexner Medical Center, Columbus, OH, USA
| | - Zhenguo Liu
- Dorothy M. Davis Heart and Lung Research Institute, Division of Cardiovascular Medicine, Department of Internal Medicine, The Ohio State University Wexner Medical Center, Columbus, OH, USA
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19
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Activity, but not mRNA expression of gelatinases correlates with susceptibility to experimental autoimmune encephalomyelitis. Neuroscience 2015; 292:1-12. [DOI: 10.1016/j.neuroscience.2015.02.015] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2014] [Revised: 02/07/2015] [Accepted: 02/10/2015] [Indexed: 01/17/2023]
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20
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Staudacher JJ, Naarmann-de Vries IS, Ujvari SJ, Klinger B, Kasim M, Benko E, Ostareck-Lederer A, Ostareck DH, Bondke Persson A, Lorenzen S, Meier JC, Blüthgen N, Persson PB, Henrion-Caude A, Mrowka R, Fähling M. Hypoxia-induced gene expression results from selective mRNA partitioning to the endoplasmic reticulum. Nucleic Acids Res 2015; 43:3219-36. [PMID: 25753659 PMCID: PMC4381074 DOI: 10.1093/nar/gkv167] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2015] [Accepted: 02/21/2015] [Indexed: 01/01/2023] Open
Abstract
Protein synthesis is a primary energy-consuming process in the cell. Therefore, under hypoxic conditions, rapid inhibition of global mRNA translation represents a major protective strategy to maintain energy metabolism. How some mRNAs, especially those that encode crucial survival factors, continue to be efficiently translated in hypoxia is not completely understood. By comparing specific transcript levels in ribonucleoprotein complexes, cytoplasmic polysomes and endoplasmic reticulum (ER)-bound ribosomes, we show that the synthesis of proteins encoded by hypoxia marker genes is favoured at the ER in hypoxia. Gene expression profiling revealed that transcripts particularly increased by the HIF-1 transcription factor network show hypoxia-induced enrichment at the ER. We found that mRNAs favourably translated at the ER have higher conservation scores for both the 5'- and 3'-untranslated regions (UTRs) and contain less upstream initiation codons (uAUGs), indicating the significance of these sequence elements for sustained mRNA translation under hypoxic conditions. Furthermore, we found enrichment of specific cis-elements in mRNA 5'- as well as 3'-UTRs that mediate transcript localization to the ER in hypoxia. We conclude that transcriptome partitioning between the cytoplasm and the ER permits selective mRNA translation under conditions of energy shortage.
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Affiliation(s)
- Jonas J Staudacher
- Charité - Universitätsmedizin Berlin, Institut für Vegetative Physiologie, Charitéplatz 1, D-10117 Berlin, Germany
| | - Isabel S Naarmann-de Vries
- University Hospital Aachen, RWTH Aachen University, Department of Intensive and Intermediate Care, Experimental Research Unit, D-52074 Aachen, Germany
| | - Stefanie J Ujvari
- Charité - Universitätsmedizin Berlin, Institut für Vegetative Physiologie, Charitéplatz 1, D-10117 Berlin, Germany
| | - Bertram Klinger
- Humboldt Universität zu Berlin, Institut für Theoretische Biologie, D-10115 Berlin, Germany Charité - Universitätsmedizin Berlin, Institut für Pathologie, D-10117 Berlin, Germany
| | - Mumtaz Kasim
- Charité - Universitätsmedizin Berlin, Institut für Vegetative Physiologie, Charitéplatz 1, D-10117 Berlin, Germany
| | - Edgar Benko
- Charité - Universitätsmedizin Berlin, Institut für Vegetative Physiologie, Charitéplatz 1, D-10117 Berlin, Germany
| | - Antje Ostareck-Lederer
- University Hospital Aachen, RWTH Aachen University, Department of Intensive and Intermediate Care, Experimental Research Unit, D-52074 Aachen, Germany
| | - Dirk H Ostareck
- University Hospital Aachen, RWTH Aachen University, Department of Intensive and Intermediate Care, Experimental Research Unit, D-52074 Aachen, Germany
| | - Anja Bondke Persson
- Charité - Universitätsmedizin Berlin, Institut für Vegetative Physiologie, Charitéplatz 1, D-10117 Berlin, Germany
| | - Stephan Lorenzen
- Universitätsklinikum Jena, Klinik für Innere Medizin III, AG Experimentelle Nephrologie, D-07743 Jena, Germany
| | - Jochen C Meier
- Max Delbrück Center for Molecular Medicine, RNA Editing and Hyperexcitability Disorders Helmholtz Group, D-13125 Berlin, Germany TU Braunschweig, Zoological Institute, Division of Cell Physiology, D-38106 Braunschweig, Germany
| | - Nils Blüthgen
- Humboldt Universität zu Berlin, Institut für Theoretische Biologie, D-10115 Berlin, Germany Charité - Universitätsmedizin Berlin, Institut für Pathologie, D-10117 Berlin, Germany
| | - Pontus B Persson
- Charité - Universitätsmedizin Berlin, Institut für Vegetative Physiologie, Charitéplatz 1, D-10117 Berlin, Germany
| | - Alexandra Henrion-Caude
- Hôpital Necker-Enfants Malades, Université Paris Descartes, Institut National de la Santé et de la Recherche Médicale (INSERM) UMR1163 and Imagine Foundation, 75015 Paris, France
| | - Ralf Mrowka
- Universitätsklinikum Jena, Klinik für Innere Medizin III, AG Experimentelle Nephrologie, D-07743 Jena, Germany
| | - Michael Fähling
- Charité - Universitätsmedizin Berlin, Institut für Vegetative Physiologie, Charitéplatz 1, D-10117 Berlin, Germany
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Bobadilla M, Sáinz N, Rodriguez JA, Abizanda G, Orbe J, de Martino A, García Verdugo JM, Páramo JA, Prósper F, Pérez-Ruiz A. MMP-10 is required for efficient muscle regeneration in mouse models of injury and muscular dystrophy. Stem Cells 2014; 32:447-61. [PMID: 24123596 DOI: 10.1002/stem.1553] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2013] [Revised: 08/20/2013] [Accepted: 08/23/2013] [Indexed: 12/17/2022]
Abstract
Matrix metalloproteinases (MMPs), a family of endopeptidases that are involved in the degradation of extracellular matrix components, have been implicated in skeletal muscle regeneration. Among the MMPs, MMP-2 and MMP-9 are upregulated in Duchenne muscular dystrophy (DMD), a fatal X-linked muscle disorder. However, inhibition or overexpression of specific MMPs in a mouse model of DMD (mdx) has yielded mixed results regarding disease progression, depending on the MMP studied. Here, we have examined the role of MMP-10 in muscle regeneration during injury and muscular dystrophy. We found that skeletal muscle increases MMP-10 protein expression in response to damage (notexin) or disease (mdx mice), suggesting its role in muscle regeneration. In addition, we found that MMP-10-deficient muscles displayed impaired recruitment of endothelial cells, reduced levels of extracellular matrix proteins, diminished collagen deposition, and decreased fiber size, which collectively contributed to delayed muscle regeneration after injury. Also, MMP-10 knockout in mdx mice led to a deteriorated dystrophic phenotype. Moreover, MMP-10 mRNA silencing in injured muscles (wild-type and mdx) reduced muscle regeneration, while addition of recombinant human MMP-10 accelerated muscle repair, suggesting that MMP-10 is required for efficient muscle regeneration. Furthermore, our data suggest that MMP-10-mediated muscle repair is associated with VEGF/Akt signaling. Thus, our findings indicate that MMP-10 is critical for skeletal muscle maintenance and regeneration during injury and disease.
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Affiliation(s)
- Míriam Bobadilla
- Cell Therapy Area, Division of Cancer, Center for Applied Medical Research (CIMA), University of Navarra, Pamplona, Spain
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22
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Jiang B, Liang P, Wang K, Lv C, Sun L, Tong Z, Liu Y, Xiao X. Nucleolin involved in myocardial ischaemic preconditioning via post-transcriptional control of HSPA1A expression. Cardiovasc Res 2014; 102:56-67. [PMID: 24442868 DOI: 10.1093/cvr/cvu006] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
AIMS Recent studies have identified the critical roles of nucleolin in a variety of cellular processes, including regulation of viral replication and tumour formation. However, the possible roles of nucleolin in myocardial preconditioning remain undefined. METHODS AND RESULTS We used an in vivo rat myocardial ischaemic preconditioning (IP) model (four cycles of 5 min ischaemia and 10 min reperfusion) and cellular hydrogen peroxide preconditioning (H2O2-PC) models. We found that nucleolin mRNA and protein expression showed a time-dependent increase during the recovery of myocardial ischaemic preconditioning in rats and H2O2-PC in neonatal rat cardiomyocytes. Nucleolin overexpression enhanced the protective effects of H2O2-PC, whereas nucleolin ablation abrogated the H2O2-PC-mediated protection in cardiomyocytes. On the other hand, nucleolin overexpression increased the stabilization of the HSPA1A mRNA and the expression of HSPA1A protein in cardiomyocytes, whereas nucleolin ablation abrogated the up-regulation of HSPA1A induced by H2O2-PC in cardiomyocytes. An interaction between nucleolin and HSPA1A mRNA was further identified using the RNA-protein interaction studies. Reporter gene assays, which depended on the untranslated regions (UTR) of HSPA1A mRNA, revealed that the post-transcriptional regulation was mainly attributed to the 3' UTR. Finally, HSPA1A anti-sense oligonucleotides (asODNs) attenuated the protective effect of nucleolin in cardiomyocytes. CONCLUSION These results indicate that nucleolin is up-regulated and involved in myocardial protection of ischaemic preconditioning via a post-transcriptional control of HSPA1A expression.
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Affiliation(s)
- Bimei Jiang
- Department of Pathophysiology, Xiangya School of Medicine, Central South University, Changsha, Hunan 410008, P.R. China
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Olenich SA, Gutierrez-Reed N, Audet GN, Olfert IM. Temporal response of positive and negative regulators in response to acute and chronic exercise training in mice. J Physiol 2013; 591:5157-69. [PMID: 23878369 PMCID: PMC3810816 DOI: 10.1113/jphysiol.2013.254979] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2013] [Accepted: 07/19/2013] [Indexed: 12/18/2022] Open
Abstract
Angiogenesis is controlled by a balance between positive and negative angiogenic factors, but temporal protein expression of many key angiogenic regulators in response to exercise are still poorly defined. In C57BL/6 mice, we evaluated the temporal protein expression of several pro-angiogenic and anti-angiogenic factors in response to (1) a single acute bout of exercise and (2) chronic exercise training resulting from 3, 5, 7, 14 and 28 days of voluntary wheel running. Following acute exercise, protein levels of vascular endothelial growth factor-A (VEGF), endostatin and nucleolin were increased at 2-4 h (P < 0.05), whereas matrix metalloproteinase (MMP)-2 was elevated within a 12-24 h window (P < 0.05). Training increased muscle capillarity 11%, 15% and 22% starting with 7, 14 and 28 days of training, respectively (P < 0.01). Basal VEGF and MMP-2 were increased by 31% and 22%, respectively, compared to controls (P < 0.05) after 7 days (7d) training, but decreased to back to baseline after 14d training. After 28d training VEGF fell 49% below baseline control (P < 0.01). Basal muscle expression of thrombospondin 1 (TSP-1) was ∼900% greater in 14d- and 28d-trained mice compared to either 5d- and 7d-trained mice (P < 0.05), and tended to increase by ∼180-258% compared to basal control levels (P < 0.10). The acute responsiveness of VEGF to exercise in untrained mice (i.e. 161% increase, P < 0.001) was lost with capillary adaptation occurring after 7, 14 and 28d training. Taken together, these data support the notion that skeletal muscle angiogenesis is controlled by a balance between positive and negative mitogens, and reveals a complex, highly-coordinated, temporal scheme whereby these factors can differentially influence capillary growth in response to acute versus chronic exercise.
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Affiliation(s)
- Sara A Olenich
- I. M. Olfert: West Virginia University School of Medicine, Center for Cardiovascular and Respiratory Sciences, Division of Exercise Physiology, One Medical Center Dr., Morgantown, WV 26506-9105, USA.
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Liang P, Jiang B, Lv C, Huang X, Sun L, Zhang P, Huang X. The expression and proangiogenic effect of nucleolin during the recovery of heat-denatured HUVECs. BIOCHIMICA ET BIOPHYSICA ACTA 2013; 1830:4500-12. [PMID: 23726991 DOI: 10.1016/j.bbagen.2013.05.027] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2013] [Revised: 04/27/2013] [Accepted: 05/20/2013] [Indexed: 11/25/2022]
Abstract
BACKGROUND The present study aims to examine the expression patterns and roles of nucleolin during the recovery of heat-denatured human umbilical vein endothelial cells (HUVECs). METHODS Deep partial thickness burn model in Sprague-Dawley rats and the heat denatured cell model (52°C, 35s) were used. The expression of nucleolin was measured using Western blot analysis and real-time PCR. Angiogenesis was assessed using in vitro parameters including endothelial cell proliferation, transwell migration assay, and scratched wound healing. Gene transfection and RNA interference approaches were employed to investigate the roles of nucleolin. RESULTS Nucleolin mRNA and protein expression showed a time-dependent increase during the recovery of heat-denatured dermis and HUVECs. Heat-denaturation time-dependently promoted cell growth, adhesion, migration, scratched wound healing and formation of tube-like structures in HUVECs. These effects of heat denaturation on endothelial wound healing and formation of tube-like structures were prevented by knockdown of nucleolin, whereas over-expression of nucleolin increased cell growth, migration, and formation of tube-like structures in cultured HUVEC endothelial cells. In addition, we found that the expression of vascular endothelial growth factor (VEGF) increased during the recovery of heat-denatured dermis and HUVECs, and nucleolin up-regulated VEGF in HUVECs. CONCLUSIONS The present study reveals that the expression of nucleolin is up-regulated, and plays a pro-angiogenic role during the recovery of heat-denatured dermis and its mechanism is probably dependent on production of VEGF. GENERAL SIGNIFICANCE We find a novel and important pro-angiogenic role of nucleolin during the recovery of heat-denatured dermis.
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Affiliation(s)
- Pengfei Liang
- Department of Burns and Plastic Surgery, Central South University, Changsha, Hunan, People's Republic of China
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Yamada T, Park CS, Lacorazza HD. Genetic control of quiescence in hematopoietic stem cells. Cell Cycle 2013; 12:2376-83. [PMID: 23839041 PMCID: PMC3841317 DOI: 10.4161/cc.25416] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2013] [Revised: 06/13/2013] [Accepted: 06/14/2013] [Indexed: 01/08/2023] Open
Abstract
Cellular quiescence is a reversible cell cycle arrest that is poised to re-enter the cell cycle in response to a combination of cell-intrinsic factors and environmental cues. In hematopoietic stem cells, a coordinated balance between quiescence and differentiating proliferation ensures longevity and prevents both genetic damage and stem cell exhaustion. However, little is known about how all these processes are integrated at the molecular level. We will briefly review the environmental and intrinsic control of stem cell quiescence and discuss a new model that involves a protein-to-protein interaction between G0S2 and the phospho-nucleoprotein nucleolin in the cytosol.
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Affiliation(s)
- Takeshi Yamada
- Department of Pathology & Immunology; Baylor College of Medicine; Texas Children’s Hospital; Houston, TX USA
| | - Chun Shik Park
- Department of Pathology & Immunology; Baylor College of Medicine; Texas Children’s Hospital; Houston, TX USA
| | - H Daniel Lacorazza
- Department of Pathology & Immunology; Baylor College of Medicine; Texas Children’s Hospital; Houston, TX USA
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Bronicki LM, Jasmin BJ. Emerging complexity of the HuD/ELAVl4 gene; implications for neuronal development, function, and dysfunction. RNA (NEW YORK, N.Y.) 2013; 19:1019-1037. [PMID: 23861535 PMCID: PMC3708524 DOI: 10.1261/rna.039164.113] [Citation(s) in RCA: 85] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Precise control of messenger RNA (mRNA) processing and abundance are increasingly being recognized as critical for proper spatiotemporal gene expression, particularly in neurons. These regulatory events are governed by a large number of trans-acting factors found in neurons, most notably RNA-binding proteins (RBPs) and micro-RNAs (miRs), which bind to specific cis-acting elements or structures within mRNAs. Through this binding mechanism, trans-acting factors, particularly RBPs, control all aspects of mRNA metabolism, ranging from altering the transcription rate to mediating mRNA degradation. In this context the best-characterized neuronal RBP, the Hu/ELAVl family member HuD, is emerging as a key component in multiple regulatory processes--including pre-mRNA processing, mRNA stability, and translation--governing the fate of a substantial amount of neuronal mRNAs. Through its ability to regulate mRNA metabolism of diverse groups of functionally similar genes, HuD plays important roles in neuronal development and function. Furthermore, compelling evidence indicates supplementary roles for HuD in neuronal plasticity, in particular, recovery from axonal injury, learning and memory, and multiple neurological diseases. The purpose of this review is to provide a detailed overview of the current knowledge surrounding the expression and roles of HuD in the nervous system. Additionally, we outline the present understanding of the molecular mechanisms presiding over the localization, abundance, and function of HuD in neurons.
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Abstract
The perinucleolar compartment (PNC) is a nuclear substructure associated with, but structurally distinct from, the nucleolus. The PNC contains several RNA processing proteins and several RNA pol III transcripts, which form novel complexes. As determined by cell culture experiments and human tumor samples, the PNC forms exclusively in cancer cells and the percentage of cancer cells in a population that have one or more PNCs directly correlates with the malignancy of that population of cells. Therefore, the PNC is being developed as a prognostic marker for several malignancies. PNC elimination in cancer cells has proven to be a useful as screening method to discover probe compounds used to elucidate PNC biology and to discover compounds with the potential to be developed as minimally toxic anti-cancer drugs.
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Affiliation(s)
- John T Norton
- Department of Cell and Molecular Biology, Northwestern University, Chicago, IL, USA
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28
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Alameddine HS. Matrix metalloproteinases in skeletal muscles: Friends or foes? Neurobiol Dis 2012; 48:508-18. [DOI: 10.1016/j.nbd.2012.07.023] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2012] [Revised: 06/28/2012] [Accepted: 07/25/2012] [Indexed: 12/13/2022] Open
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Abstract
BACKGROUND With increasing evidence that hydroperoxides are not only toxic but rather exert essential physiological functions, also hydroperoxide removing enzymes have to be re-viewed. In mammals, the peroxidases inter alia comprise the 8 glutathione peroxidases (GPx1-GPx8) so far identified. SCOPE OF THE REVIEW Since GPxs have recently been reviewed under various aspects, we here focus on novel findings considering their diverse physiological roles exceeding an antioxidant activity. MAJOR CONCLUSIONS GPxs are involved in balancing the H2O2 homeostasis in signalling cascades, e.g. in the insulin signalling pathway by GPx1; GPx2 plays a dual role in carcinogenesis depending on the mode of initiation and cancer stage; GPx3 is membrane associated possibly explaining a peroxidatic function despite low plasma concentrations of GSH; GPx4 has novel roles in the regulation of apoptosis and, together with GPx5, in male fertility. Functions of GPx6 are still unknown, and the proposed involvement of GPx7 and GPx8 in protein folding awaits elucidation. GENERAL SIGNIFICANCE Collectively, selenium-containing GPxs (GPx1-4 and 6) as well as their non-selenium congeners (GPx5, 7 and 8) became key players in important biological contexts far beyond the detoxification of hydroperoxides. This article is part of a Special Issue entitled Cellular functions of glutathione.
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Affiliation(s)
- Regina Brigelius-Flohé
- Department of Biochemistry of Micronutrients, German Institute of Human Nutrition, Nuthetal, Germany.
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Westmark CJ, Malter JS. The regulation of AβPP expression by RNA-binding proteins. Ageing Res Rev 2012; 11:450-9. [PMID: 22504584 DOI: 10.1016/j.arr.2012.03.005] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2011] [Revised: 03/13/2012] [Accepted: 03/28/2012] [Indexed: 12/29/2022]
Abstract
Amyloid β-protein precursor (AβPP) is cleaved by β- and γ-secretases to liberate amyloid beta (Aβ), the predominant protein found in the senile plaques associated with Alzheimer's disease (AD) and Down syndrome (Masters et al., 1985). Intense investigation by the scientific community has centered on understanding the molecular pathways that underlie the production and accumulation of Aβ Therapeutics that reduce the levels of this tenacious, plaque-promoting peptide may reduce the ongoing neural dysfunction and neuronal degeneration that occurs so profoundly in AD. AβPP and Aβ production are highly complex and involve still to be elucidated combinations of transcriptional, post-transcriptional, translational and post-translational events that mediate the production, processing and clearance of these proteins. Research in our laboratory for the past two decades has focused on the role of RNA binding proteins (RBPs) in mediating the post-transcriptional as well as translational regulation of APP messenger RNA (mRNA). This review article summarizes our findings, as well as those from other laboratories, describing the identification of regulatory RBPs, where and under what conditions they interact with APP mRNA and how those interactions control AβPP and Aβ synthesis.
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Affiliation(s)
- Cara J Westmark
- University of Wisconsin, Waisman Center for Developmental Disabilities, 1500 Highland Avenue, Madison, WI 53705, USA.
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Abstract
Nucleolin is a multifunctional protein localized primarily in the nucleolus, but also found in the nucleoplasm, cytoplasm and cell membrane. It is involved in several aspects of DNA metabolism, and participates extensively in RNA regulatory mechanisms, including transcription, ribosome assembly, mRNA stability and translation, and microRNA processing. Nucleolin's implication in disease is linked to its ability to associate with target RNAs via its four RNA-binding domains and its arginine/glycin-rich domain. By modulating the post-transcriptional fate of target mRNAs, which typically bear AU-rich and/or G-rich elements, nucleolin has been linked to cellular events that influence disease, notably cell proliferation and protection against apoptotic death. Through its diverse RNA functions, nucleolin is increasingly implicated in pathological processes, particularly cancer and viral infection. Here, we review the RNA-binding activities of nucleolin, its influence on gene expression patterns, and its impact upon diseases. We also discuss the rising interest in targeting nucleolin therapeutically.
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Affiliation(s)
- Kotb Abdelmohsen
- Laboratory of Molecular Biology and Immunology, National Institute on Aging-Intramural Research Program, National Institutes of Health, Baltimore, MD, USA.
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Yamada T, Park CS, Burns A, Nakada D, Lacorazza HD. The cytosolic protein G0S2 maintains quiescence in hematopoietic stem cells. PLoS One 2012; 7:e38280. [PMID: 22693613 PMCID: PMC3365016 DOI: 10.1371/journal.pone.0038280] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2012] [Accepted: 05/02/2012] [Indexed: 02/06/2023] Open
Abstract
Bone marrow hematopoietic stem cells (HSCs) balance proliferation and differentiation by integrating complex transcriptional and post-translational mechanisms regulated by cell intrinsic and extrinsic factors. We found that transcripts of G(0)/G(1) switch gene 2 (G0S2) are enriched in lineage(-) Sca-1(+) c-kit(+) (LSK) CD150(+) CD48(-) CD41(-) cells, a population highly enriched for quiescent HSCs, whereas G0S2 expression is suppressed in dividing LSK CD150(+) CD48(-) cells. Gain-of-function analyses using retroviral expression vectors in bone marrow cells showed that G0S2 localizes to the mitochondria, endoplasmic reticulum, and early endosomes in hematopoietic cells. Co-transplantation of bone marrow cells transduced with the control or G0S2 retrovirus led to increased chimerism of G0S2-overexpressing cells in femurs, although their contribution to the blood was reduced. This finding was correlated with increased quiescence in G0S2-overexpressing HSCs (LSK CD150(+) CD48(-)) and progenitor cells (LS(-)K). Conversely, silencing of endogenous G0S2 expression in bone marrow cells increased blood chimerism upon transplantation and promoted HSC cell division, supporting an inhibitory role for G0S2 in HSC proliferation. A proteomic study revealed that the hydrophobic domain of G0S2 interacts with a domain of nucleolin that is rich in arginine-glycine-glycine repeats, which results in the retention of nucleolin in the cytosol. We showed that this cytosolic retention of nucleolin occurs in resting, but not proliferating, wild-type LSK CD150(+) CD48(-) cells. Collectively, we propose a novel model of HSC quiescence in which elevated G0S2 expression can sequester nucleolin in the cytosol, precluding its pro-proliferation functions in the nucleolus.
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Affiliation(s)
- Takeshi Yamada
- Department of Pathology & Immunology, Baylor College of Medicine, Texas Children's Hospital, Houston, Texas, United States of America
| | - Chun Shik Park
- Department of Pathology & Immunology, Baylor College of Medicine, Texas Children's Hospital, Houston, Texas, United States of America
| | - Audrea Burns
- Department of Pathology & Immunology, Baylor College of Medicine, Texas Children's Hospital, Houston, Texas, United States of America
| | - Daisuke Nakada
- Department of Molecular and Human Genetics, Baylor College of Medicine, Texas Children's Hospital, Houston, Texas, United States of America
| | - H. Daniel Lacorazza
- Department of Pathology & Immunology, Baylor College of Medicine, Texas Children's Hospital, Houston, Texas, United States of America
- Department of Pediatrics, Baylor College of Medicine, Texas Children's Hospital, Houston, Texas, United States of America
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Scott JA, Xie L, Li H, Li W, He JB, Sanders PN, Carter AB, Backs J, Anderson ME, Grumbach IM. The multifunctional Ca2+/calmodulin-dependent kinase II regulates vascular smooth muscle migration through matrix metalloproteinase 9. Am J Physiol Heart Circ Physiol 2012; 302:H1953-64. [PMID: 22427508 DOI: 10.1152/ajpheart.00978.2011] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
The multifunctional CaMKII has been implicated in vascular smooth muscle cell (VSMC) migration, but little is known regarding its downstream targets that mediate migration. Here, we examined whether CaMKII regulates migration through modulation of matrix metalloproteinase 9 (MMP9). Using CaMKIIδ(-/-) mice as a model system, we evaluated migration and MMP9 regulation in vitro and in vivo. After ligation of the common carotid artery, CaMKII was activated in the neointima as determined by oxidation and autophosphorylation. We found that MMP9 was robustly expressed in the neointima and adventitia of carotid-ligated wild-type (WT) mice but was barely detectable in CaMKIIδ(-/-) mice. The perimeter of the external elastic lamina, a correlate of migration-related outward remodeling, was increased in WT but not in CaMKIIδ(-/-) mice. Migration induced by serum, platelet-derived growth factor, and tumor necrosis factor-α (TNF-α) was significantly decreased in CaMKIIδ(-/-) as compared with WT VSMCs, but migration was rescued with adenoviral overexpression of MMP9 in CaMKIIδ(-/-) VSMCs. Likewise, overexpression of CaMKIIδ in CaMKIIδ(-/-) VSMCs increased migration, whereas an oxidation-resistant mutant of CaMKIIδ did not. TNF-α strongly induced CaMKII oxidation and autophosphorylation as well as MMP9 activity, mRNA, and protein levels in WT, but not in CaMKIIδ(-/-) VSMC. Surprisingly, TNF-α strongly induced MMP9 promoter activity in WT and CaMKIIδ(-/-) VSMC. However, the MMP9 mRNA stability was significantly decreased in CaMKIIδ(-/-) VSMC. Our data demonstrate that CaMKII promotes VSMC migration through posttranscriptional regulation of MMP9 and suggest that CaMKII effects on MMP9 expression may be a therapeutic pathway in vascular injury.
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Affiliation(s)
- Jason A Scott
- Department of Medicine, Carver College of Medicine, University of Iowa, Iowa City, IA 52242, USA
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Abdelmohsen K, Tominaga K, Lee EK, Srikantan S, Kang MJ, Kim MM, Selimyan R, Martindale JL, Yang X, Carrier F, Zhan M, Becker KG, Gorospe M. Enhanced translation by Nucleolin via G-rich elements in coding and non-coding regions of target mRNAs. Nucleic Acids Res 2011; 39:8513-30. [PMID: 21737422 PMCID: PMC3201861 DOI: 10.1093/nar/gkr488] [Citation(s) in RCA: 100] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2011] [Revised: 05/25/2011] [Accepted: 05/27/2011] [Indexed: 01/26/2023] Open
Abstract
RNA-binding proteins (RBPs) regulate gene expression at many post-transcriptional levels, including mRNA stability and translation. The RBP nucleolin, with four RNA-recognition motifs, has been implicated in cell proliferation, carcinogenesis and viral infection. However, the subset of nucleolin target mRNAs and the influence of nucleolin on their expression had not been studied at a transcriptome-wide level. Here, we globally identified nucleolin target transcripts, many of which encoded cell growth- and cancer-related proteins, and used them to find a signature motif on nucleolin target mRNAs. Surprisingly, this motif was very rich in G residues and was not only found in the 3'-untranslated region (UTR), but also in the coding region (CR) and 5'-UTR. Nucleolin enhanced the translation of mRNAs bearing the G-rich motif, since silencing nucleolin did not change target mRNA stability, but decreased the size of polysomes forming on target transcripts and lowered the abundance of the encoded proteins. In summary, nucleolin binds G-rich sequences in the CR and UTRs of target mRNAs, many of which encode cancer proteins, and enhances their translation.
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Affiliation(s)
- Kotb Abdelmohsen
- Laboratory of Molecular Biology and Immunology, National Institute on Aging - Intramural Research Program, NIH, Baltimore, MD 21224, USA.
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Tominaga K, Srikantan S, Lee EK, Subaran SS, Martindale JL, Abdelmohsen K, Gorospe M. Competitive regulation of nucleolin expression by HuR and miR-494. Mol Cell Biol 2011; 31:4219-31. [PMID: 21859890 PMCID: PMC3187287 DOI: 10.1128/mcb.05955-11] [Citation(s) in RCA: 88] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2011] [Revised: 08/10/2011] [Accepted: 08/12/2011] [Indexed: 11/20/2022] Open
Abstract
The RNA-binding protein (RBP) nucleolin promotes the expression of several proliferative proteins. Nucleolin levels are high in cancer cells, but the mechanisms that control nucleolin expression are unknown. Here, we show that nucleolin abundance is controlled posttranscriptionally via factors that associate with its 3' untranslated region (3'UTR). The RBP HuR was found to interact with the nucleolin (NCL) 3'UTR and specifically promoted nucleolin translation without affecting nucleolin mRNA levels. In human cervical carcinoma HeLa cells, analysis of a traceable NCL 3'UTR bearing MS2 RNA hairpins revealed that NCL RNA was mobilized to processing bodies (PBs) after silencing HuR, suggesting that the repression of nucleolin translation may occur in PBs. Immunoprecipitation of MS2-tagged NCL 3'UTR was used to screen for endogenous repressors of nucleolin synthesis. This search identified miR-494 as a microRNA that potently inhibited nucleolin expression, enhanced NCL mRNA association with argonaute-containing complexes, and induced NCL RNA transport to PBs. Importantly, miR-494 and HuR functionally competed for modulation of nucleolin expression. Moreover, the promotion of cell growth previously attributed to HuR was due in part to the HuR-elicited increase in nucleolin expression. Our collective findings indicate that nucleolin expression is positively regulated by HuR and negatively regulated via competition with miR-494.
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Affiliation(s)
- Kumiko Tominaga
- Laboratory of Molecular Biology and Immunology, NIA-IRP, NIH, Baltimore, Maryland 21224
| | - Subramanya Srikantan
- Laboratory of Molecular Biology and Immunology, NIA-IRP, NIH, Baltimore, Maryland 21224
| | - Eun Kyung Lee
- Laboratory of Molecular Biology and Immunology, NIA-IRP, NIH, Baltimore, Maryland 21224
| | - Sarah S. Subaran
- Laboratory of Cardiovascular Science, NIA-IRP, NIH, Baltimore, Maryland 21224
| | | | - Kotb Abdelmohsen
- Laboratory of Molecular Biology and Immunology, NIA-IRP, NIH, Baltimore, Maryland 21224
| | - Myriam Gorospe
- Laboratory of Molecular Biology and Immunology, NIA-IRP, NIH, Baltimore, Maryland 21224
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Krust B, El Khoury D, Nondier I, Soundaramourty C, Hovanessian AG. Targeting surface nucleolin with multivalent HB-19 and related Nucant pseudopeptides results in distinct inhibitory mechanisms depending on the malignant tumor cell type. BMC Cancer 2011; 11:333. [PMID: 21812966 PMCID: PMC3199867 DOI: 10.1186/1471-2407-11-333] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2011] [Accepted: 08/03/2011] [Indexed: 12/24/2022] Open
Abstract
BACKGROUND Nucleolin expressed at the cell surface is a binding protein for a variety of ligands implicated in tumorigenesis and angiogenesis. By using a specific antagonist that binds the C-terminal RGG domain of nucleolin, the HB-19 pseudopeptide, we recently reported that targeting surface nucleolin with HB-19 suppresses progression of established human breast tumor cells in the athymic nude mice, and delays development of spontaneous melanoma in the RET transgenic mice. METHODS By the capacity of HB-19 to bind stably surface nucleolin, we purified and identified nucleolin partners at the cell surface. HB-19 and related multivalent Nucant pseudopeptides, that present pentavalently or hexavalently the tripeptide Lysψ(CH2N)-Pro-Arg, were then used to show that targeting surface nucleolin results in distinct inhibitory mechanisms on breast, prostate, colon carcinoma and leukemia cells. RESULTS Surface nucleolin exists in a 500-kDa protein complex including several other proteins, which we identified by microsequencing as two Wnt related proteins, Ku86 autoantigen, signal recognition particle subunits SRP68/72, the receptor for complement component gC1q-R, and ribosomal proteins S4/S6. Interestingly, some of the surface-nucleolin associated proteins are implicated in cell signaling, tumor cell adhesion, migration, invasion, cell death, autoimmunity, and bacterial infections. Surface nucleolin in the 500-kDa complex is highly stable. Surface nucleolin antagonists, HB-19 and related multivalent Nucant pseudopeptides, exert distinct inhibitory mechanisms depending on the malignant tumor cell type. For example, in epithelial tumor cells they inhibit cell adhesion or spreading and induce reversion of the malignant phenotype (BMC cancer 2010, 10:325) while in leukemia cells they trigger a rapid cell death associated with DNA fragmentation. The fact that these pseudopeptides do not cause cell death in epithelial tumor cells indicates that cell death in leukemia cells is triggered by a specific signaling mechanism, rather than nonspecific cellular injury. CONCLUSIONS Our results suggest that targeting surface nucleolin could change the organization of the 500-kDa complex to interfere with the proper functioning of surface nucleolin and the associated proteins, and thus lead to distinct inhibitory mechanisms. Consequently, HB-19 and related Nucant pseudopeptides provide novel therapeutic opportunities in treatment of a wide variety of cancers and related malignancies.
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Affiliation(s)
- Bernard Krust
- CNRS-Université Paris Descartes, Unité Régulation de la Transcription de Maladies Génétique, 45 rue des Saints Pères, 75270 Paris Cedex 06, France
| | - Diala El Khoury
- CNRS-Université Paris Descartes, Unité Régulation de la Transcription de Maladies Génétique, 45 rue des Saints Pères, 75270 Paris Cedex 06, France
| | - Isabelle Nondier
- CNRS-Université Paris Descartes, Unité Régulation de la Transcription de Maladies Génétique, 45 rue des Saints Pères, 75270 Paris Cedex 06, France
| | - Calaiselvy Soundaramourty
- CNRS-Université Paris Descartes, Unité Régulation de la Transcription de Maladies Génétique, 45 rue des Saints Pères, 75270 Paris Cedex 06, France
| | - Ara G Hovanessian
- CNRS-Université Paris Descartes, Unité Régulation de la Transcription de Maladies Génétique, 45 rue des Saints Pères, 75270 Paris Cedex 06, France
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Meissner M, Berlinski B, Gille J, Doll M, Kaufmann R. Peroxisome proliferator activated receptor-α agonists suppress transforming growth factor-α-induced matrix metalloproteinase-9 expression in human keratinocytes. Clin Exp Dermatol 2011; 36:911-4. [PMID: 21790722 DOI: 10.1111/j.1365-2230.2011.04125.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
The peroxisome proliferator-activated receptors (PPARs), PPARα, PPARδ, and PPARγ, are nuclear ligand-activated transcription factors that are best known as regulators of glucose and lipid metabolism. PPARα agonists have been shown to have profound anti-inflammatory and antiproliferative effects on human keratinocytes, and are important for maintaining homeostasis of the skin. To better characterize the mechanisms underlying these phenomena, we analysed the effects of PPARα agonists on transforming growth factor (TGF)-α-induced expression of matrix metalloproteinase (MMP)-9. MMP-9 expression in keratinocytes has previously been linked to inflammatory skin diseases, regenerative skin mechanisms, and tumour development and metastasis. We found that PPARα agonists effectively inhibited TGF-α-induced MMP-9 expression in human keratinocytes via a post-transcriptional mechanism, revealing a novel and important aspect of the anti-inflammatory and anticarcinogenic action of these compounds.
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Affiliation(s)
- M Meissner
- Department of Dermatology, Johann Wolfgang Goethe-University, Frankfurt am Main, Germany.
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Gorospe M, Tominaga K, Wu X, Fähling M, Ivan M. Post-Transcriptional Control of the Hypoxic Response by RNA-Binding Proteins and MicroRNAs. Front Mol Neurosci 2011; 4:7. [PMID: 21747757 PMCID: PMC3130151 DOI: 10.3389/fnmol.2011.00007] [Citation(s) in RCA: 86] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2011] [Accepted: 06/17/2011] [Indexed: 01/08/2023] Open
Abstract
Mammalian gene expression patterns change profoundly in response to low oxygen levels. These changes in gene expression programs are strongly influenced by post-transcriptional mechanisms mediated by mRNA-binding factors: RNA-binding proteins (RBPs) and microRNAs (miRNAs). Here, we review the RBPs and miRNAs that modulate mRNA turnover and translation in response to hypoxic challenge. RBPs such as HuR (human antigen R), PTB (polypyrimidine tract-binding protein), heterogeneous nuclear ribonucleoproteins (hnRNPs), tristetraprolin, nucleolin, iron-response element-binding proteins (IRPs), and cytoplasmic polyadenylation-element-binding proteins (CPEBs), selectively bind to numerous hypoxia-regulated transcripts and play a major role in establishing hypoxic gene expression patterns. MiRNAs including miR-210, miR-373, and miR-21 associate with hypoxia-regulated transcripts and further modulate the levels of the encoded proteins to implement the hypoxic gene expression profile. We discuss the potent regulation of hypoxic gene expression by RBPs and miRNAs and their integrated actions in the cellular hypoxic response.
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Affiliation(s)
- Myriam Gorospe
- Laboratory of Molecular Biology and Immunology, National Institute on Aging-Intramural Research Program, National Institutes of HealthBaltimore, MD, USA
| | - Kumiko Tominaga
- Laboratory of Molecular Biology and Immunology, National Institute on Aging-Intramural Research Program, National Institutes of HealthBaltimore, MD, USA
| | - Xue Wu
- Department of Medicine, Indiana University School of MedicineIndianapolis, IN, USA
| | - Michael Fähling
- Institut für Vegetative Physiologie, Campus Charité Mitte, Charité – Universitätsmedizin BerlinBerlin, Germany
| | - Mircea Ivan
- Department of Medicine, Indiana University School of MedicineIndianapolis, IN, USA
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Krust B, El Khoury D, Soundaramourty C, Nondier I, Hovanessian AG. Suppression of tumorigenicity of rhabdoid tumor derived G401 cells by the multivalent HB-19 pseudopeptide that targets surface nucleolin. Biochimie 2011; 93:426-33. [PMID: 21040752 DOI: 10.1016/j.biochi.2010.10.015] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2010] [Accepted: 10/21/2010] [Indexed: 02/02/2023]
Abstract
Several studies have indicated that the cell-surface expressed nucleolin is implicated in tumorigenesis and angiogenesis, and represents an important target for cancer therapy. Here we show that treatment of rhabdoid tumor derived G401 cells with a nucleolin antagonist, the HB-19 pseudopeptide, could restore contact inhibition, impair anchorage-independent growth, and suppress tumor development in nude mice. G401 cells grow without contact inhibition, which is an in vitro characteristic property of malignant tumor cells. At concentrations of HB-19 that does not affect cell viability and multiplication index, there is restoration of contact inhibition thus suggesting that HB-19 treatment causes reversion of the malignant phenotype. Accordingly, HB-19 pretreated G401 cells lose the capacity to form colonies in soft agar. When assayed for tumorigenicity in nude mice, only 50% of mice injected with HB-19 pretreated G401 cells developed tumors with the mean tumor weight of 0.32 g, compared to 100% of mice injected with control G401 cells with the mean tumor weight of 2.36 g. Interestingly, the restoration of contact inhibition in HB-19 treated G401 cells is concomitant with marked reduction of transcripts coding the Wilms' tumor 1 gene, matrix metalloproteinase-2, epithelial isoform of CD44, and vascular endothelial growth factor, whereas no apparent modification is detected for transcripts coding the proto-oncogene c-Myc, anti-apoptotic Bcl-2, pro-apoptotic Bax, tissue inhibitor of metalloproteinase TIMP-1, angiogenesis inhibitor TSP-1, and growth factor Midkine. These findings indicate that the molecular mechanism of action of HB-19 on such highly malignant rhabdoid tumor cells is associated with a selective inhibitory effect on the expression of genes implicated in tumorigenesis and angiogenesis.
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Affiliation(s)
- Bernard Krust
- CNRS-Université Paris Descartes, Unité Régulation de la Transcription de Maladies Génétique, 45 rue des Saints Pères, Paris Cedex 06, France
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Miyazaki D, Nakamura A, Fukushima K, Yoshida K, Takeda S, Ikeda SI. Matrix metalloproteinase-2 ablation in dystrophin-deficient mdx muscles reduces angiogenesis resulting in impaired growth of regenerated muscle fibers. Hum Mol Genet 2011; 20:1787-99. [PMID: 21320869 DOI: 10.1093/hmg/ddr062] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
Matrix metalloproteases (MMPs) are a family of endopeptidases classified into subgroups based on substrate preference in normal physiological processes such as embryonic development and tissue remodeling, as well as in various disease processes via degradation of extracellular matrix components. Among the MMPs, MMP-9 and MMP-2 have been reported to be up-regulated in skeletal muscles in the lethal X-linked muscle disorder Duchenne muscular dystrophy (DMD), which is caused by loss of dystrophin. A recent study showed that deletion of the MMP9 gene in mdx, a mouse model for DMD, improved skeletal muscle pathology and function; however, the role of MMP-2 in the dystrophin-deficient muscle is not well known. In this study, we aimed at verifying the role of MMP-2 in the dystrophin-deficient muscle by using mdx mice with genetic ablation of MMP-2 (mdx/MMP-2(-/-)). We found impairment of regenerated muscle fiber growth with reduction of angiogenesis in mdx/MMP-2(-/-) mice at 3 months of age. Expression of vascular endothelial growth factor-A (VEGF-A), an important angiogenesis-related factor, decreased in mdx/MMP-2(-/-) mice at 3 months of age. MMP-2 had not a critical role in the degradation of dystrophin-glycoprotein complex (DGC) components such as β-dystroglycan and β-sarcoglycan in the regeneration process of the dystrophic muscle. Accordingly, MMP-2 may be essential for growth of regenerated muscle fibers through VEGF-associated angiogenesis in the dystrophin-deficient skeletal muscle.
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Affiliation(s)
- Daigo Miyazaki
- Department of Medicine (Neurology and Rheumatology), Shinshu University School of Medicine, 3-1-1 Asahi, Matsumoto 390-8621, Japan
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Hovanessian AG, Soundaramourty C, El Khoury D, Nondier I, Svab J, Krust B. Surface expressed nucleolin is constantly induced in tumor cells to mediate calcium-dependent ligand internalization. PLoS One 2010; 5:e15787. [PMID: 21203423 PMCID: PMC3009748 DOI: 10.1371/journal.pone.0015787] [Citation(s) in RCA: 156] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2010] [Accepted: 11/24/2010] [Indexed: 12/31/2022] Open
Abstract
BACKGROUND Nucleolin is one of the major proteins of the nucleolus, but it is also expressed on the cell surface where is serves as a binding protein for variety of ligands implicated in tumorigenesis and angiogenesis. Emerging evidence suggests that the cell-surface expressed nucleolin is a strategic target for an effective and nontoxic cancer therapy. METHODOLOGY/PRINCIPAL FINDINGS By monitoring the expression of nucleolin mRNA, and by measuring the level of nucleolin protein recovered from the surface and nucleus of cells, here we show that the presence of nucleolin at the cell surface is dependent on the constant induction of nucleolin mRNA. Indeed, inhibitors of RNA transcription or translation block expression of surface nucleolin while no apparent effect is observed on the level of nucleolin in the nucleus. The estimated half-life of surface nucleolin is less than one hour, whereas that of nuclear nucleolin is more than 8 hours. Nucleolin mRNA induction is reduced markedly in normal fibroblasts that reach confluence, while it occurs continuously even in post-confluent epithelial tumor cells consistent with their capacity to proliferate without contact inhibition. Interestingly, cold and heat shock induce nucleolin mRNA concomitantly to enhanced mRNA expression of the heat shock protein 70, thus suggesting that surface nucleolin induction also occurs in response to an environmental insult. At the cell surface, one of the main functions of nucleolin is to shuttle specific extracellular ligands by an active transport mechanism, which we show here to be calcium dependent. CONCLUSION/SIGNIFICANCE Our results demonstrate that the expression of surface nucleolin is an early metabolic event coupled with tumor cell proliferation and stress response. The fact that surface nucleolin is constantly and abundantly expressed on the surface of tumor cells, makes them a preferential target for the inhibitory action of anticancer agents that target surface nucleolin.
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Affiliation(s)
- Ara G Hovanessian
- CNRS-Université Paris Descartes, Unité Régulation de la Transcription de Maladies Génétique, Paris, France.
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Rickert M, Dreier R, Radons J, Opolka A, Grifka J, Anders S, Grässel S. Interaction of periosteal explants with articular chondrocytes alters expression profile of matrix metalloproteinases. J Orthop Res 2010; 28:1576-85. [PMID: 20973060 DOI: 10.1002/jor.21154] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Periosteal tissue is a source of growth factors and of osteochondral progenitor cells which makes it suitable for implantation in chondral defects as known in autologous chondrocyte implantation. The aim of this study was to determine the interaction between periosteal tissue and articular chondrocytes with respect to catabolic effectors such as matrix metalloproteinases (MMPs) and IL-6. Human articular chondrocytes were cultured for up to 28 days as micromass pellets in coculture either with physical contact to periosteal explants or allowing paracrine interactions only. Expression, secretion, and activation of MMPs and IL-6 were analyzed in chondrocytes, periosteum, and culture supernatants. Both coculture conditions influence gene expression levels of MMPs and IL-6 in a time-, culture-, and tissue-dependent manner. Coculturing of periosteum with chondrocytes promotes gene expression and secretion of IL-6. In periosteum, physical contact inhibits MMP-2 and MMP-13 gene expression while paracrine coculture induces expression of IL-6, MMP-2, -7, and -13. Pro-MMP-2, -7, and -13 were detected in supernatants of all culture regimens whereas pro-MMP-9 was secreted from periosteum only. As a balanced amount of MMP activity is likely required to achieve sufficient integration of the regenerate tissue with the surrounding healthy cartilage, an exceeding expression of proteinases might result in degradation, hypertrophy or rejection of the graft.
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Affiliation(s)
- Matthias Rickert
- Department of Orthopaedic Surgery, Experimental Orthopaedics, University Hospital of Regensburg, 93077 Bad Abbach, Germany
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Differential modulation of the cytokine-induced MMP-9/TIMP-1 protease-antiprotease system by the mTOR inhibitor rapamycin. Biochem Pharmacol 2010; 81:134-43. [PMID: 20854798 DOI: 10.1016/j.bcp.2010.09.011] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2010] [Revised: 09/09/2010] [Accepted: 09/10/2010] [Indexed: 01/07/2023]
Abstract
The mTOR-inhibitor rapamycin is a potent drug used in many immunosuppressive and antiinflammatory therapeutic regimes. In renal transplantation despite its beneficial roles rapamycin in some cases can promote renal fibrosis in the kidney but the underlying mechanisms are unknown. In this study, we tested for possible modulatory effects of rapamycin on the cytokine-triggered matrix metalloproteinase 9 (MMP-9)/tissue inhibitor of metalloproteinase (TIMP)-1 protease-antiprotease system which is critically involved in renal inflammation and fibrosis. Treatment of rat mesangial cells (MC) with rapamycin dose-dependently reduced the interleukin 1β (IL-1β)-triggered increase in gelatinolytic levels as demonstrated by zymography. The reduction in the extracellular MMP-9 content by rapamycin coincided with an attenuation in cytokine-induced steady-state MMP-9 mRNA levels. Conversely, rapamycin caused a dose-dependent increase in cytokine-evoked TIMP-1 expression in a Smad binding element (SBE)-dependent manner. Surprisingly, the attenuation of MMP-9 mRNA levels by rapamycin is accompanied by a potentiation of IL-1β-induced MMP-9 promoter activity in which the stimulatory effects by rapamycin are mainly attributed to a proximal AP-1 binding site. Furthermore, the rapamycin-dependent potentiation of MMP-9 expression is accompanied by an amplification of cytokine-triggered activities of nuclear factor κB (NF-κB) and activator protein 1 (AP-1) transcription factors. Importantly, rapamycin-triggered increase in MMP-9 promoter activity is fully impaired when we used a MMP-9 reporter construct which is under the additional control of the 3' untranslated region (3'-UTR) of MMP-9. Collectively, these data imply that rapamycin inhibits the cytokine-induced MMP-9 mainly through posttranscriptional events and thereby exerts profibrotic activities.
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Aksoy Y, Ercan A, Dalmizrak O, Canpinar H, Kartal Durmazlar SP, Bayazit M. The determination of matrix metalloproteinase 9 activity and gene expression levels in Behcet’s disease patients with aneurysmal complications. Clin Rheumatol 2010; 30:515-9. [DOI: 10.1007/s10067-010-1559-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2010] [Revised: 07/23/2010] [Accepted: 08/26/2010] [Indexed: 10/19/2022]
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Ishimaru D, Zuraw L, Ramalingam S, Sengupta TK, Bandyopadhyay S, Reuben A, Fernandes DJ, Spicer EK. Mechanism of regulation of bcl-2 mRNA by nucleolin and A+U-rich element-binding factor 1 (AUF1). J Biol Chem 2010; 285:27182-27191. [PMID: 20571027 PMCID: PMC2930717 DOI: 10.1074/jbc.m109.098830] [Citation(s) in RCA: 87] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2009] [Revised: 05/28/2010] [Indexed: 11/06/2022] Open
Abstract
The antiapoptotic Bcl-2 protein is overexpressed in a variety of cancers, particularly leukemias. In some cell types this is the result of enhanced stability of bcl-2 mRNA, which is controlled by elements in its 3'-untranslated region. Nucleolin is one of the proteins that binds to bcl-2 mRNA, thereby increasing its half-life. Here, we examined the site on the bcl-2 3'-untranslated region that is bound by nucleolin as well as the protein binding domains important for bcl-2 mRNA recognition. RNase footprinting and RNA fragment binding assays demonstrated that nucleolin binds to a 40-nucleotide region at the 5' end of the 136-nucleotide bcl-2 AU-rich element (ARE(bcl-2)). The first two RNA binding domains of nucleolin were sufficient for high affinity binding to ARE(bcl-2). In RNA decay assays, ARE(bcl-2) transcripts were protected from exosomal decay by the addition of nucleolin. AUF1 has been shown to recruit the exosome to mRNAs. When MV-4-11 cell extracts were immunodepleted of AUF1, the rate of decay of ARE(bcl-2) transcripts was reduced, indicating that nucleolin and AUF1 have opposing roles in bcl-2 mRNA turnover. When the function of nucleolin in MV-4-11 cells was impaired by treatment with the nucleolin-targeting aptamer AS1411, association of AUF1 with bcl-2 mRNA was increased. This suggests that the degradation of bcl-2 mRNA induced by AS1411 results from both interference with nucleolin protection of bcl-2 mRNA and recruitment of the exosome by AUF1. Based on our findings, we propose a model that illustrates the opposing roles of nucleolin and AUF1 in regulating bcl-2 mRNA stability.
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Affiliation(s)
- Daniella Ishimaru
- Department of Biochemistry and Molecular Biology, Medical University of South Carolina, Charleston, South Carolina 29425
| | - Lisa Zuraw
- Department of Chemistry, The Citadel, Charleston, South Carolina 29409
| | - Sivakumar Ramalingam
- Department of Biochemistry and Molecular Biology, Medical University of South Carolina, Charleston, South Carolina 29425
| | - Tapas K Sengupta
- Department of Biochemistry and Molecular Biology, Medical University of South Carolina, Charleston, South Carolina 29425
| | - Sumita Bandyopadhyay
- Department of Biochemistry and Molecular Biology, Medical University of South Carolina, Charleston, South Carolina 29425
| | - Adrian Reuben
- Division of Gastroenterology and Hepatology, Department of Medicine, Medical University of South Carolina, Charleston, South Carolina 29425
| | - Daniel J Fernandes
- Department of Biochemistry and Molecular Biology, Medical University of South Carolina, Charleston, South Carolina 29425
| | - Eleanor K Spicer
- Department of Biochemistry and Molecular Biology, Medical University of South Carolina, Charleston, South Carolina 29425.
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Jiang S, Fritz DT, Rogers MB. A conserved post-transcriptional BMP2 switch in lung cells. J Cell Biochem 2010; 110:509-21. [PMID: 20432245 DOI: 10.1002/jcb.22567] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
An ultra-conserved sequence in the bone morphogenetic protein 2 (BMP2) 3' untranslated region (UTR) markedly represses BMP2 expression in non-transformed lung cells. In contrast, the ultra-conserved sequence stimulates BMP2 expression in transformed lung cells. The ultra-conserved sequence functions as a post-transcriptional cis-regulatory switch. A common single-nucleotide polymorphism (SNP, rs15705, +A1123C), which has been shown to influence human morphology, disrupts a conserved element within the ultra-conserved sequence and altered reporter gene activity in non-transformed lung cells. This polymorphism changed the affinity of the BMP2 RNA for several proteins including nucleolin, which has an increased affinity for the C allele. Elevated BMP2 synthesis is associated with increased malignancy in mouse models of lung cancer and poor lung cancer patient prognosis. Understanding the cis- and trans-regulatory factors that control BMP2 synthesis is relevant to the initiation or progression of pathologies associated with abnormal BMP2 levels.
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Affiliation(s)
- Shan Jiang
- Department of Biochemistry and Molecular Biology, UMDNJ-NJMS, Newark, New Jersey 07101, USA
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Matrix metalloproteinase 9 expression: new regulatory elements. J Ocul Biol Dis Infor 2010; 3:41-52. [PMID: 21818406 DOI: 10.1007/s12177-010-9054-2] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2010] [Accepted: 06/28/2010] [Indexed: 12/11/2022] Open
Abstract
Retinal ganglion cells apoptosis is linked to matrix metalloproteinase 9 (MMP-9) controlled changes of extracellular matrix. Abnormal expression of MMP-9 is associated with glaucomatous alterations. Thus, the knowledge of MMP-9 regulation is important for the understanding the pathogenesis of glaucoma. Here, we investigated the role of 3'-untranslated regions (3'-UTR) and microRNAs in MMP-9 regulation. We used in vitro mutagenesis and Luc reporter system to identify regulatory elements in the 3'-UTR of MMP-9. microRNAs were analyzed by qRT-PCR, and their role was investigated with inhibitors and mimics. We identified targets for miRNAs in 3'-UTR of MMP-9 involved in the regulation of MMP-9 expression. We then isolated miRNAs from the optic nerve A7 astrocytes and 293 T cells and confirmed the role of mi340 in the regulation using specific inhibitors and mimics. The results obtained show a new miRNA-mediated mechanism of MMP-9 expression regulation.
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Miniard AC, Middleton LM, Budiman ME, Gerber CA, Driscoll DM. Nucleolin binds to a subset of selenoprotein mRNAs and regulates their expression. Nucleic Acids Res 2010; 38:4807-20. [PMID: 20385601 PMCID: PMC2919729 DOI: 10.1093/nar/gkq247] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2009] [Revised: 03/17/2010] [Accepted: 03/24/2010] [Indexed: 01/20/2023] Open
Abstract
Selenium, an essential trace element, is incorporated into selenoproteins as selenocysteine (Sec), the 21st amino acid. In order to synthesize selenoproteins, a translational reprogramming event must occur since Sec is encoded by the UGA stop codon. In mammals, the recoding of UGA as Sec depends on the selenocysteine insertion sequence (SECIS) element, a stem-loop structure in the 3' untranslated region of the transcript. The SECIS acts as a platform for RNA-binding proteins, which mediate or regulate the recoding mechanism. Using UV crosslinking, we identified a 110 kDa protein, which binds with high affinity to SECIS elements from a subset of selenoprotein mRNAs. The crosslinking activity was purified by RNA affinity chromatography and identified as nucleolin by mass spectrometry analysis. In vitro binding assays showed that purified nucleolin discriminates among SECIS elements in the absence of other factors. Based on siRNA experiments, nucleolin is required for the optimal expression of certain selenoproteins. There was a good correlation between the affinity of nucleolin for a SECIS and its effect on selenoprotein expression. As selenoprotein transcript levels and localization did not change in siRNA-treated cells, our results suggest that nucleolin selectively enhances the expression of a subset of selenoproteins at the translational level.
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Affiliation(s)
- Angela C. Miniard
- Department of Cell Biology, Department of Cancer Biology, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, Agricultural Technical Institute, Ohio State University, Wooster, OH 44691 and Department of Molecular Medicine, Cleveland Clinic Lerner College of Medicine of Case Western Reserve University, Cleveland, OH 44195, USA
| | - Lisa M. Middleton
- Department of Cell Biology, Department of Cancer Biology, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, Agricultural Technical Institute, Ohio State University, Wooster, OH 44691 and Department of Molecular Medicine, Cleveland Clinic Lerner College of Medicine of Case Western Reserve University, Cleveland, OH 44195, USA
| | - Michael E. Budiman
- Department of Cell Biology, Department of Cancer Biology, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, Agricultural Technical Institute, Ohio State University, Wooster, OH 44691 and Department of Molecular Medicine, Cleveland Clinic Lerner College of Medicine of Case Western Reserve University, Cleveland, OH 44195, USA
| | - Carri A. Gerber
- Department of Cell Biology, Department of Cancer Biology, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, Agricultural Technical Institute, Ohio State University, Wooster, OH 44691 and Department of Molecular Medicine, Cleveland Clinic Lerner College of Medicine of Case Western Reserve University, Cleveland, OH 44195, USA
| | - Donna M. Driscoll
- Department of Cell Biology, Department of Cancer Biology, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, Agricultural Technical Institute, Ohio State University, Wooster, OH 44691 and Department of Molecular Medicine, Cleveland Clinic Lerner College of Medicine of Case Western Reserve University, Cleveland, OH 44195, USA
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Lee YJ, Kang SW, Baek HJ, Choi HJ, Bae YD, Kang EH, Lee EY, Lee EB, Song YW. Association between matrix metalloproteinase 9 promoter polymorphisms and Behçet's disease. Hum Immunol 2010; 71:717-22. [DOI: 10.1016/j.humimm.2010.03.009] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2009] [Revised: 03/12/2010] [Accepted: 03/22/2010] [Indexed: 11/27/2022]
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Matrix metalloproteinases: Evolution, gene regulation and functional analysis in mouse models. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2010; 1803:3-19. [DOI: 10.1016/j.bbamcr.2009.07.004] [Citation(s) in RCA: 379] [Impact Index Per Article: 27.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2009] [Revised: 07/11/2009] [Accepted: 07/14/2009] [Indexed: 12/19/2022]
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