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Fang S, Cheng Y, Deng F, Zhang B. RNF34 ablation promotes cerebrovascular remodeling and hypertension by increasing NADPH-derived ROS generation. Neurobiol Dis 2021; 156:105396. [PMID: 34015492 DOI: 10.1016/j.nbd.2021.105396] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2020] [Revised: 05/09/2021] [Accepted: 05/14/2021] [Indexed: 10/21/2022] Open
Abstract
Cerebrovascular remodeling is the most common cause of hypertension and stroke. Ubiquitin E3 ligase RING finger protein 34 (RNF34) is suggested to be associated with the development of multiple neurological diseases. However, the importance of RNF34 in cerebrovascular remodeling and hypertension is poorly understood. Herein, we used mice with a global RNF34 knockout as well as RNF34 floxed mice to delete RNF34 in endothelial cells and smooth muscle cells (SMCs). Our results showed that global RNF34 knockout mice substantially promoted angiotensin II (AngII)-induced middle cerebral artery (MCA) remodeling, hypertension, and neurological dysfunction. Endothelial cell RNF34 did not regulate the development of hypertension. Rather, SMC RNF34 expression is a critical regulator of hypertension and MCA remodeling. Loss of RNF34 enhanced AngII-induced mouse brain vascular SMCs (MBVSMCs) proliferation, migration and invasion. Furthermore, MCA and MBVSMCs from SMC RNF34-deficient mice showed increased superoxide anion and reactive oxygen species (ROS) generation as well as nicotinamide adenine dinucleotide phosphate (NADPH) oxidase activity, but exhibited no marked effect on mitochondria-derived ROS. Knockout of RNF34 promoted p22phox expression, leading to increased binding of p22phox/p47phox and p22phox/NOX2, and eventually NADPH oxidase complex formation. Immunoprecipitation assay identified that RNF34 interacted with p22phox. RNF34 deletion increased p22phox protein stability by inhibiting ubiquitin-mediated degradation. Blockade of NADPH oxidase activity or knockdown of p22phox significantly abolished the effects of RNF34 deletion on cerebrovascular remodeling and hypertension. Collectively, our study demonstrates that SMC RNF34 deficiency promotes cerebrovascular SMC hyperplasia and remodeling by increased NADPH-derived ROS generation via reducing p22phox ubiquitin-dependent degradation.
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Affiliation(s)
- Shaokuan Fang
- Department of Neurology, The First Teaching Hospital of Jilin University, Changchun 130021, Jilin, China
| | - Yingying Cheng
- Department of Neurology, The First Teaching Hospital of Jilin University, Changchun 130021, Jilin, China
| | - Fang Deng
- Department of Neurology, The First Teaching Hospital of Jilin University, Changchun 130021, Jilin, China
| | - Beilin Zhang
- Department of Neurology, The First Teaching Hospital of Jilin University, Changchun 130021, Jilin, China.
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Pasquereau-Kotula E, Hosten B, Hontonnou F, Vignal N, Antoni F, Poyet JL, Rizzo-Padoin N, Sarda-Mantel L. Evaluation of planar bioluminescence imaging and microPET/CT for therapy monitoring in a mouse model of pigmented metastatic melanoma. AMERICAN JOURNAL OF NUCLEAR MEDICINE AND MOLECULAR IMAGING 2018; 8:397-406. [PMID: 30697459 PMCID: PMC6334212] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 08/21/2018] [Accepted: 11/21/2018] [Indexed: 06/09/2023]
Abstract
Bioluminescence imaging (BLI) is widely used for in-vivo monitoring of anti-cancer therapy in mice. [18F]MEL050 is a Positron Emission Tomography (PET) radiotracer which specifically targets melanin. We evaluated planar BLI and [18F]MEL050-PET/CT for therapy (pro-apoptotic peptide LZDP) monitoring in a mouse model of metastatic pigmented melanoma. Twelve B6-albino mice were intravenously injected with B16-F10-luc2 cells on day 0 (D0). The mice received daily from D2 to D17 either an inactive peptide (G1, n=6), or LZDP (G2, n=6). They underwent both BLI and [18F]MEL050-PET/CT imaging on D2, D8 and D17. The number of visible tumors was determined on BLI and PET/CT. [18F]MEL050 uptake in tumor sites was quantified on PET/CT. After sacrifice (D17), the number of black tumors was counted ex-vivo. On D2, BLI and PET/CT images were visually negative. On D8, BLI detected 8 tumor sites in 4/6 mice of G1 vs 5 in 3/6 mice of G2 (NS); PET/CT was visually negative. On D17, BLI detected 17 tumor sites in 5/6 mice of G1 vs 10 in 4/6 mice of G2 (NS). PET/CT detected 18 tumor sites in 4/4 mice of G1 vs 14 in 3/4 mice of G2 (NS). Mean %ID/g of [18F]MEL050 in tumor sites was lower in G2 than in G1 on D17 (P<0.001), whereas bioluminescence intensity was not different between the 2 groups. Ex-vivo examination confirmed lower number of tumors in G2 (P<0.03). In the small number of animals tested in this study, [18F]MEL050-PET/CT and ex-vivo examination could affirm anti-tumoral effect of LZDP, but not BLI.
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Affiliation(s)
- Ewa Pasquereau-Kotula
- Inserm UMR-S1160, Institut Universitaire d’Hématologie, Hôpital St-LouisParis, France
| | - Benoit Hosten
- Unité Claude Kellershohn, Institut Universitaire d’Hématologie, Hôpital St-LouisParis, France
- Inserm UMR-S1144, Faculté de Pharmacie, Université Paris DescartesParis, France
| | - Fortune Hontonnou
- Unité Claude Kellershohn, Institut Universitaire d’Hématologie, Hôpital St-LouisParis, France
- Université Paris DiderotParis, France
| | - Nicolas Vignal
- Unité Claude Kellershohn, Institut Universitaire d’Hématologie, Hôpital St-LouisParis, France
- Inserm UMR-S1144, Faculté de Pharmacie, Université Paris DescartesParis, France
| | - Florent Antoni
- Unité Claude Kellershohn, Institut Universitaire d’Hématologie, Hôpital St-LouisParis, France
| | - Jean-Luc Poyet
- Inserm UMR-S1160, Institut Universitaire d’Hématologie, Hôpital St-LouisParis, France
| | - Nathalie Rizzo-Padoin
- Unité Claude Kellershohn, Institut Universitaire d’Hématologie, Hôpital St-LouisParis, France
- Inserm UMR-S1144, Faculté de Pharmacie, Université Paris DescartesParis, France
| | - Laure Sarda-Mantel
- Unité Claude Kellershohn, Institut Universitaire d’Hématologie, Hôpital St-LouisParis, France
- Université Paris DiderotParis, France
- Inserm UMR-S942, Hôpital LariboisièreParis, France
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Yu Q, Zhang S, Chao K, Feng R, Wang H, Li M, Chen B, He Y, Zeng Z, Chen M. E3 Ubiquitin ligase RNF183 Is a Novel Regulator in Inflammatory Bowel Disease. J Crohns Colitis 2016; 10:713-25. [PMID: 26818663 DOI: 10.1093/ecco-jcc/jjw023] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/23/2015] [Accepted: 01/04/2016] [Indexed: 12/13/2022]
Abstract
BACKGROUND AND AIMS Specific members of the RING finger [RNF] protein family serve as E3 ubiquitin ligases and play important roles in the regulation of inflammation. However, their roles in the pathogenesis of inflammatory bowel disease [IBD] have not been explored. METHODS Genomic microarray of inflamed colon samples from Crohn's disease [CD] patients was performed to identify potential up-regulated genes. Expression of the identified highly up-regulated RNF183 gene was subsequently examined by quantitative reverse transcription polymerase chain reaction [qRT-PCR], western blotting and immunohistochemistry of the intestinal tissues of IBD patients and the colons of trinitrobenzene sulphonic acid [TNBS]-induced colitic mice. RNF183-mediated interaction with the NF-κB pathway and ubiquitination of IκBα were examined by siRNA, plasmid transfection, and immunoprecipitation. The miRNA predicted to target RNF183 was explored and its role in the RNF183/ NF-κB pathway was investigated. RESULTS RNF183 was up-regulated in intestinal epithelial cells in IBD patients and in colitic mice. RNF183 promoted intestinal inflammation via the activation of the NF-κB pathway by increasing the ubiquitination and degradation of IκBα. Computational analysis identified putative binding of miR-7 to RNF183. Transfection of intestinal cells with a miR-7 mimic or inhibitor confirmed its negative regulatory effect on RNF183 expression and ubiquitination of IκBα. miR-7 was down-regulated in inflamed colon tissues of IBD patients and colitic mice. CONCLUSIONS RNF183, which is negatively regulated by miR-7, is a novel regulator promoting intestinal inflammation by increasing the ubiquitination and degradation of IκBα, thereby inducing NF-κB activation. The interaction between RNF183-mediated ubiquitination and miRNA may be an important novel epigenetic mechanism in the pathogenesis of IBD.
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Affiliation(s)
- Qiao Yu
- IBD Center, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, P.R. China
| | - Shenghong Zhang
- IBD Center, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, P.R. China
| | - Kang Chao
- IBD Center, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, P.R. China
| | - Rui Feng
- IBD Center, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, P.R. China
| | - Huiling Wang
- IBD Center, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, P.R. China
| | - Manying Li
- IBD Center, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, P.R. China
| | - Baili Chen
- IBD Center, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, P.R. China
| | - Yao He
- IBD Center, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, P.R. China
| | - Zhirong Zeng
- IBD Center, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, P.R. China
| | - Minhu Chen
- IBD Center, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, P.R. China
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Dufort S, Bianchi A, Henry M, Lux F, Le Duc G, Josserand V, Louis C, Perriat P, Crémillieux Y, Tillement O, Coll JL. Nebulized gadolinium-based nanoparticles: a theranostic approach for lung tumor imaging and radiosensitization. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2015; 11:215-221. [PMID: 25201285 DOI: 10.1002/smll.201401284] [Citation(s) in RCA: 67] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2014] [Revised: 07/14/2014] [Indexed: 06/03/2023]
Abstract
Lung cancer is the most common and most fatal cancer worldwide. Thus, improving early diagnosis and therapy is necessary. Previously, gadolinium-based ultra-small rigid platforms (USRPs) were developed to serve as multimodal imaging probes and as radiosensitizing agents. In addition, it was demonstrated that USRPs can be detected in the lungs using ultrashort echo-time magnetic resonance imaging (UTE-MRI) and fluorescence imaging after intrapulmonary administration in healthy animals. The goal of the present study is to evaluate their theranostic properties in mice with bioluminescent orthotopic lung cancer, after intrapulmonary nebulization or conventional intravenous administration. It is found that lung tumors can be detected non-invasively using fluorescence tomography or UTE-MRI after nebulization of USRPs, and this is confirmed by histological analysis of the lung sections. The deposition of USRPs around the tumor nodules is sufficient to generate a radiosensitizing effect when the mice are subjected to a single dose of 10 Gy conventional radiation one day after inhalation (mean survival time of 112 days versus 77 days for irradiated mice without USRPs treatment). No apparent systemic toxicity or induction of inflammation is observed. These results demonstrate the theranostic properties of USRPs for the multimodal detection of lung tumors and improved radiotherapy after nebulization.
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Affiliation(s)
- Sandrine Dufort
- INSERM U823, Institut Albert Bonniot, 38706, Grenoble cedex, France; Université Joseph Fourier, Institut Albert Bonniot, 38706, Grenoble cedex, France; Nano-H S.A.S, 2 place de l'Europe, 38070, Saint Quentin - Fallavier, France
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Ozawa T, Yoshimura H, Kim SB. Advances in Fluorescence and Bioluminescence Imaging. Anal Chem 2012; 85:590-609. [DOI: 10.1021/ac3031724] [Citation(s) in RCA: 151] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Takeaki Ozawa
- Department of Chemistry, Graduate
School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Hideaki Yoshimura
- Department of Chemistry, Graduate
School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Sung Bae Kim
- Research Institute for Environmental Management
Technology, National Institute of Advanced Industrial Science and Technology (AIST), 16-1 Onogawa, Tsukuba
305-8569, Japan
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