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Della Rosa G, Gostynska NE, Ephraim JW, Sganga S, Panuccio G, Palazzolo G, Tirelli N. Magnesium alginate as a low-viscosity (intramolecularly cross-linked) system for the sustained and neuroprotective release of magnesium. Carbohydr Polym 2024; 331:121871. [PMID: 38388038 DOI: 10.1016/j.carbpol.2024.121871] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2023] [Revised: 01/12/2024] [Accepted: 01/24/2024] [Indexed: 02/24/2024]
Abstract
The administration of Mg ions is advantageous in pathological scenarios such as pre-enclampsia and forms of neuroinflammation (e.g. stroke or injury); yet, few systems exist for their sustained delivery. Here, we present the (static light scattering and diffusing-wave spectroscopy) characterization of magnesium alginate (MgAlg) as a potentially injectable vehicle ifor the delivery of Mg. Differently from other divalent cations, Mg does not readily induce gelation: it acts within MgAlg coils, making them more rigid and less prone to entangle. As a result, below a threshold concentration (notionally below 0.5 % wt.) MgAlg are inherently less viscous than those of sodium alginate (NaAlg), which is a major advantage for injectables; at higher concentrations, however, (stable, Mg-based) aggregation starts occurring. Importantly, Mg can then be released e.g. in artificial cerebrospinal fluid, via a slow (hours) process of ion exchange. Finally, we here show that MgAlg protects rat neural stem cells from the consequence of an oxidative insult (100 μM H2O2), an effect that we can only ascribe to the sustained liberation of Mg ions, since it was not shown by NaAlg, MgSO4 or the NaAlg/MgSO4 combination. Our results therefore indicate that MgAlg is a promising vehicle for Mg delivery under pathological (inflammatory) conditions.
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Affiliation(s)
- Giulia Della Rosa
- Enhanced Regenerative Medicine, Fondazione Istituto Italiano di Tecnologia, 16163 Genova, Italy; Laboratory for Polymers and Biomaterials, Fondazione Istituto Italiano di Tecnologia, 16163 Genova, Italy.
| | - Natalia Ewa Gostynska
- Enhanced Regenerative Medicine, Fondazione Istituto Italiano di Tecnologia, 16163 Genova, Italy
| | - John Wesley Ephraim
- Enhanced Regenerative Medicine, Fondazione Istituto Italiano di Tecnologia, 16163 Genova, Italy
| | - Stefania Sganga
- Laboratory for Polymers and Biomaterials, Fondazione Istituto Italiano di Tecnologia, 16163 Genova, Italy.
| | - Gabriella Panuccio
- Enhanced Regenerative Medicine, Fondazione Istituto Italiano di Tecnologia, 16163 Genova, Italy.
| | - Gemma Palazzolo
- Enhanced Regenerative Medicine, Fondazione Istituto Italiano di Tecnologia, 16163 Genova, Italy.
| | - Nicola Tirelli
- Laboratory for Polymers and Biomaterials, Fondazione Istituto Italiano di Tecnologia, 16163 Genova, Italy.
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Peng J, Han L, Liu B, Song J, Wang Y, Wang K, Guo Q, Liu X, Li Y, Zhang J, Wu W, Li S, Fu X, Zhuang CL, Zhang W, Suo S, Hu P, Zhao Y. Gli1 marks a sentinel muscle stem cell population for muscle regeneration. Nat Commun 2023; 14:6993. [PMID: 37914731 PMCID: PMC10620419 DOI: 10.1038/s41467-023-42837-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2023] [Accepted: 10/23/2023] [Indexed: 11/03/2023] Open
Abstract
Adult skeletal muscle regeneration is mainly driven by muscle stem cells (MuSCs), which are highly heterogeneous. Although recent studies have started to characterize the heterogeneity of MuSCs, whether a subset of cells with distinct exists within MuSCs remains unanswered. Here, we find that a population of MuSCs, marked by Gli1 expression, is required for muscle regeneration. The Gli1+ MuSC population displays advantages in proliferation and differentiation both in vitro and in vivo. Depletion of this population leads to delayed muscle regeneration, while transplanted Gli1+ MuSCs support muscle regeneration more effectively than Gli1- MuSCs. Further analysis reveals that even in the uninjured muscle, Gli1+ MuSCs have elevated mTOR signaling activity, increased cell size and mitochondrial numbers compared to Gli1- MuSCs, indicating Gli1+ MuSCs are displaying the features of primed MuSCs. Moreover, Gli1+ MuSCs greatly contribute to the formation of GAlert cells after muscle injury. Collectively, our findings demonstrate that Gli1+ MuSCs represents a distinct MuSC population which is more active in the homeostatic muscle and enters the cell cycle shortly after injury. This population functions as the tissue-resident sentinel that rapidly responds to injury and initiates muscle regeneration.
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Affiliation(s)
- Jiayin Peng
- State Key Laboratory of Cell Biology, Shanghai Institute of Biochemistry and Cell Biology, Center for Excellence in Molecular Cell Science, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, 200031, PR China
| | - Lili Han
- Key Laboratory of Systems Health Science of Zhejiang Province, School of Life Science, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou, 310024, PR China
| | - Biao Liu
- State Key Laboratory of Cell Biology, Shanghai Institute of Biochemistry and Cell Biology, Center for Excellence in Molecular Cell Science, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, 200031, PR China
| | - Jiawen Song
- State Key Laboratory of Cell Biology, Shanghai Institute of Biochemistry and Cell Biology, Center for Excellence in Molecular Cell Science, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, 200031, PR China
| | - Yuang Wang
- State Key Laboratory of Cell Biology, Shanghai Institute of Biochemistry and Cell Biology, Center for Excellence in Molecular Cell Science, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, 200031, PR China
| | - Kunpeng Wang
- State Key Laboratory of Cell Biology, Shanghai Institute of Biochemistry and Cell Biology, Center for Excellence in Molecular Cell Science, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, 200031, PR China
- School of Life Science and Technology, ShanghaiTech University, 100 Haike Road, Shanghai, 201210, PR China
| | - Qian Guo
- Key Laboratory of Systems Health Science of Zhejiang Province, School of Life Science, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou, 310024, PR China
| | - XinYan Liu
- State Key Laboratory of Cell Biology, Shanghai Institute of Biochemistry and Cell Biology, Center for Excellence in Molecular Cell Science, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, 200031, PR China
| | - Yu Li
- State Key Laboratory of Cell Biology, Shanghai Institute of Biochemistry and Cell Biology, Center for Excellence in Molecular Cell Science, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, 200031, PR China
| | - Jujin Zhang
- Key Laboratory of Systems Health Science of Zhejiang Province, School of Life Science, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou, 310024, PR China
| | - Wenqing Wu
- State Key Laboratory of Cell Biology, Shanghai Institute of Biochemistry and Cell Biology, Center for Excellence in Molecular Cell Science, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, 200031, PR China
| | - Sheng Li
- Xinhua Hospital affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, 200023, PR China
| | - Xin Fu
- Xinhua Hospital affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, 200023, PR China
| | - Cheng-le Zhuang
- The 10th People's Hospital affiliated to Tongji University, Shanghai, 200072, PR China
| | - Weikang Zhang
- Guangzhou Laboratory-Guangzhou Medical University, Guangzhou, 510005, PR China
- College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, 430074, PR China
| | - Shengbao Suo
- Guangzhou Laboratory-Guangzhou Medical University, Guangzhou, 510005, PR China
- The First Affiliated Hospital of Guangzhou Medical University, State Key Laboratory of Respiratory Disease, Guangzhou, Guangdong, 510005, PR China
| | - Ping Hu
- Xinhua Hospital affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, 200023, PR China.
- The 10th People's Hospital affiliated to Tongji University, Shanghai, 200072, PR China.
- Guangzhou Laboratory-Guangzhou Medical University, Guangzhou, 510005, PR China.
- Key Laboratory of Biological Targeting Diagnosis, Therapy and Rehabilitation of Guangdong Higher Education Institutes, The Fifth Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong, 510005, PR China.
| | - Yun Zhao
- State Key Laboratory of Cell Biology, Shanghai Institute of Biochemistry and Cell Biology, Center for Excellence in Molecular Cell Science, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, 200031, PR China.
- Key Laboratory of Systems Health Science of Zhejiang Province, School of Life Science, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou, 310024, PR China.
- School of Life Science and Technology, ShanghaiTech University, 100 Haike Road, Shanghai, 201210, PR China.
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Yang Q, Zhang L, Li M, Xu Y, Chen X, Yuan R, Ou X, He M, Liao M, Zhang L, Dai H, Lv M, Xie X, Liang W, Chen X. Single-nucleus transcriptomic mapping uncovers targets for traumatic brain injury. Genome Res 2023; 33:1818-1832. [PMID: 37730437 PMCID: PMC10691476 DOI: 10.1101/gr.277881.123] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2023] [Accepted: 09/11/2023] [Indexed: 09/22/2023]
Abstract
The subventricular zone (SVZ) is a neurogenic niche that contributes to homeostasis and repair after brain injury. However, the effects of mild traumatic brain injury (mTBI) on the divergence of the regulatory DNA landscape within the SVZ and its link to functional alterations remain unexplored. In this study, we mapped the transcriptome atlas of murine SVZ and its responses to mTBI at the single-cell level. We observed cell-specific gene expression changes following mTBI and unveiled diverse cell-to-cell interaction networks that influence a wide array of cellular processes. Moreover, we report novel neurogenesis lineage trajectories and related key transcription factors, which we validate through loss-of-function experiments. Specifically, we validate the role of Tcf7l1, a cell cycle gene regulator, in promoting neural stem cell differentiation toward the neuronal lineage after mTBI, providing a potential target for regenerative medicine. Overall, our study profiles an SVZ transcriptome reference map, which underlies the differential cellular behavior in response to mTBI. The identified key genes and pathways that may ameliorate brain damage or facilitate neural repair serve as a comprehensive resource for drug discovery in the context of mTBI.
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Affiliation(s)
- Qiuyun Yang
- Department of Forensic Genetics, West China School of Basic Medical Sciences and Forensic Medicine, Sichuan University, Chengdu 610000, China
- West China Second University Hospital, Sichuan University, Chengdu 610041, China
| | - Lingxuan Zhang
- West China School of Basic Medical Sciences and Forensic Medicine, Sichuan University, Chengdu 610000, China
| | - Manrui Li
- Department of Forensic Genetics, West China School of Basic Medical Sciences and Forensic Medicine, Sichuan University, Chengdu 610000, China
| | - Yang Xu
- Department of Forensic Genetics, West China School of Basic Medical Sciences and Forensic Medicine, Sichuan University, Chengdu 610000, China
| | - Xiaogang Chen
- Department of Forensic Pathology and Forensic Clinical Medicine, West China School of Basic Medical Sciences and Forensic Medicine, Sichuan University, Chengdu 610000, China
| | - Ruixuan Yuan
- West China School of Basic Medical Sciences and Forensic Medicine, Sichuan University, Chengdu 610000, China
| | - Xiaofeng Ou
- Department of Critical Care Medicine, Sichuan University, Chengdu 610000, China
| | - Min He
- Department of Critical Care Medicine, Sichuan University, Chengdu 610000, China
| | - Miao Liao
- Department of Forensic Genetics, West China School of Basic Medical Sciences and Forensic Medicine, Sichuan University, Chengdu 610000, China
| | - Lin Zhang
- Sichuan University, Chengdu 610041, China
| | - Hao Dai
- Department of Forensic Pathology and Forensic Clinical Medicine, West China School of Basic Medical Sciences and Forensic Medicine, Sichuan University, Chengdu 610000, China
| | - Meili Lv
- Department of Immunology, West China School of Basic Medical Sciences and Forensic Medicine, Sichuan University, Chengdu 610000, China
| | - Xiaoqi Xie
- Department of Critical Care Medicine, Sichuan University, Chengdu 610000, China;
| | - Weibo Liang
- Department of Forensic Genetics, West China School of Basic Medical Sciences and Forensic Medicine, Sichuan University, Chengdu 610000, China;
| | - Xiameng Chen
- Department of Forensic Pathology and Forensic Clinical Medicine, West China School of Basic Medical Sciences and Forensic Medicine, Sichuan University, Chengdu 610000, China;
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