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Sun J, Zeng Q, Wu Z, Li Z, Gao Q, Liao Z, Li H, Ling C, Chen C, Wang H, Zhang B. Enhancing intraneural revascularization following peripheral nerve injury through hypoxic Schwann-cell-derived exosomes: an insight into endothelial glycolysis. J Nanobiotechnology 2024; 22:283. [PMID: 38789980 PMCID: PMC11127458 DOI: 10.1186/s12951-024-02536-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2023] [Accepted: 05/09/2024] [Indexed: 05/26/2024] Open
Abstract
BACKGROUND Endothelial cell (EC)-driven intraneural revascularization (INRV) and Schwann cells-derived exosomes (SCs-Exos) both play crucial roles in peripheral nerve injury (PNI). However, the interplay between them remains unclear. We aimed to elucidate the effects and underlying mechanisms of SCs-Exos on INRV following PNI. RESULTS We found that GW4869 inhibited INRV, as well as that normoxic SCs-Exos (N-SCs-Exos) exhibited significant pro-INRV effects in vivo and in vitro that were potentiated by hypoxic SCs-Exos (H-SCs-Exos). Upregulation of glycolysis emerged as a pivotal factor for INRV after PNI, as evidenced by the observation that 3PO administration, a glycolytic inhibitor, inhibited the INRV process in vivo and in vitro. H-SCs-Exos more significantly enhanced extracellular acidification rate/oxygen consumption rate ratio, lactate production, and glycolytic gene expression while simultaneously suppressing acetyl-CoA production and pyruvate dehydrogenase E1 subunit alpha (PDH-E1α) expression than N-SCs-Exos both in vivo and in vitro. Furthermore, we determined that H-SCs-Exos were more enriched with miR-21-5p than N-SCs-Exos. Knockdown of miR-21-5p significantly attenuated the pro-glycolysis and pro-INRV effects of H-SCs-Exos. Mechanistically, miR-21-5p orchestrated EC metabolism in favor of glycolysis by targeting von Hippel-Lindau/hypoxia-inducible factor-1α and PDH-E1α, thereby enhancing hypoxia-inducible factor-1α-mediated glycolysis and inhibiting PDH-E1α-mediated oxidative phosphorylation. CONCLUSION This study unveiled a novel intrinsic mechanism of pro-INRV after PNI, providing a promising therapeutic target for post-injury peripheral nerve regeneration and repair.
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Affiliation(s)
- Jun Sun
- Department of Neurosurgery, the Third Affiliated Hospital of Sun Yat-sen University, No. 600 Tianhe Road, Guangzhou, Guangdong, 510630, PR China
| | - Qiuhua Zeng
- Department of Radiology, Guangdong Provincial Hospital of Chinese Medicine, Guangzhou, 510000, China
| | - Zhimin Wu
- Department of Neurosurgery, the Third Affiliated Hospital of Sun Yat-sen University, No. 600 Tianhe Road, Guangzhou, Guangdong, 510630, PR China
| | - Zhangyu Li
- Department of Neurosurgery, School of Medicine, the First Affiliated Hospital of Xiamen University, Xiamen University, Xiamen, 361102, China
| | - Qun Gao
- Department of Neurosurgery, Peking University People's Hospital, 11th Xizhi Men South St, Beijing, 100044, China
| | - Zhi Liao
- Department of Neurosurgery, the Third Affiliated Hospital of Sun Yat-sen University, No. 600 Tianhe Road, Guangzhou, Guangdong, 510630, PR China
| | - Hao Li
- Department of Neurosurgery, Guangzhou Panyu Central Hospital, No.8, Fuyu East Road, Qiaonan Street, Panyu District, Guangzhou, 511400, Guangdong, PR China
| | - Cong Ling
- Department of Neurosurgery, the Third Affiliated Hospital of Sun Yat-sen University, No. 600 Tianhe Road, Guangzhou, Guangdong, 510630, PR China
| | - Chuan Chen
- Department of Neurosurgery, the Third Affiliated Hospital of Sun Yat-sen University, No. 600 Tianhe Road, Guangzhou, Guangdong, 510630, PR China.
| | - Hui Wang
- Department of Neurosurgery, the Third Affiliated Hospital of Sun Yat-sen University, No. 600 Tianhe Road, Guangzhou, Guangdong, 510630, PR China.
| | - Baoyu Zhang
- Department of Neurosurgery, the Third Affiliated Hospital of Sun Yat-sen University, No. 600 Tianhe Road, Guangzhou, Guangdong, 510630, PR China
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2
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Zeng X, Ma S, Luo Y, Zhang Y, Wang Q, Zhang Z, Ke W, Ma Y, Hu H, Hartung T, Wei Y, Zhong X. Environmentally Relevant Concentrations of Tetrabromobisphenol A Exposure Impends Neurovascular Formation through Perturbing Mitochondrial Metabolism in Zebrafish Embryos and Human Primary Endothelial Cells. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2024; 58:5267-5278. [PMID: 38478874 DOI: 10.1021/acs.est.3c10132] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/27/2024]
Abstract
Tetrabromobisphenol A (TBBPA), the most extensively utilized brominated flame retardant, has raised growing concerns regarding its environmental and health risks. Neurovascular formation is essential for metabolically supporting neuronal networks. However, previous studies primarily concerned the neuronal injuries of TBBPA, its impact on the neurovascularture, and molecular mechanism, which are yet to be elucidated. In this study, 5, 30, 100, 300 μg/L of TBBPA were administered to Tg (fli1a: eGFP) zebrafish larvae at 2-72 h postfertilization (hpf). The findings revealed that TBBPA impaired cerebral and ocular angiogenesis in zebrafish. Metabolomics analysis showed that TBBPA-treated neuroendothelial cells exhibited disruption of the TCA cycle and the Warburg effect pathway. TBBPA induced a significant reduction in glycolysis and mitochondrial ATP production rates, accompanied by mitochondrial fragmentation and an increase in mitochondrial reactive oxygen species (mitoROS) production in neuroendothelial cells. The supplementation of alpha-ketoglutaric acid, a key metabolite of the TCA cycle, mitigated TBBPA-induced mitochondrial damage, reduced mitoROS production, and restored angiogenesis in zebrafish larvae. Our results suggested that TBBPA exposure impeded neurovascular injury via mitochondrial metabolic perturbation mediated by mitoROS signaling, providing novel insight into the neurovascular toxicity and mode of action of TBBPA.
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Affiliation(s)
- Xiangyu Zeng
- Guangdong Provincial Key Laboratory of Food, Nutrition and Health, Department of Toxicology, School of Public Health, Sun Yat-sen University, Guangzhou 510080, China
| | - Shengtao Ma
- School of Public Health, Guangzhou Medical University, Guangzhou 511436, China
| | - Yijun Luo
- Guangdong Provincial Key Laboratory of Food, Nutrition and Health, Department of Toxicology, School of Public Health, Sun Yat-sen University, Guangzhou 510080, China
| | - Yangjian Zhang
- Guangdong Provincial Key Laboratory of Food, Nutrition and Health, Department of Toxicology, School of Public Health, Sun Yat-sen University, Guangzhou 510080, China
| | - Qi Wang
- Guangdong Provincial Key Laboratory of Food, Nutrition and Health, Department of Toxicology, School of Public Health, Sun Yat-sen University, Guangzhou 510080, China
| | - Zhuyi Zhang
- Guangdong Provincial Key Laboratory of Food, Nutrition and Health, Department of Toxicology, School of Public Health, Sun Yat-sen University, Guangzhou 510080, China
| | - Weijian Ke
- Guangdong Provincial Key Laboratory of Food, Nutrition and Health, Department of Toxicology, School of Public Health, Sun Yat-sen University, Guangzhou 510080, China
| | - Ya Ma
- Guangdong Provincial Key Laboratory of Food, Nutrition and Health, Department of Toxicology, School of Public Health, Sun Yat-sen University, Guangzhou 510080, China
| | - Haichen Hu
- Guangdong Provincial Key Laboratory of Food, Nutrition and Health, Department of Toxicology, School of Public Health, Sun Yat-sen University, Guangzhou 510080, China
| | - Thomas Hartung
- Center for Alternatives to Animal Testing, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, Maryland 21230, United States
- University of Konstanz, Konstanz 78464, Germany
| | - Yanhong Wei
- Guangdong Provincial Key Laboratory of Food, Nutrition and Health, Department of Toxicology, School of Public Health, Sun Yat-sen University, Guangzhou 510080, China
| | - Xiali Zhong
- Guangdong Provincial Key Laboratory of Food, Nutrition and Health, Department of Toxicology, School of Public Health, Sun Yat-sen University, Guangzhou 510080, China
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3
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Wu N, Li W, Chen Q, Chen M, Chen S, Cheng C, Xie Y. Research Advances in Neuroblast Migration in Traumatic Brain Injury. Mol Neurobiol 2024:10.1007/s12035-024-04117-4. [PMID: 38507029 DOI: 10.1007/s12035-024-04117-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2023] [Accepted: 02/17/2024] [Indexed: 03/22/2024]
Abstract
Neuroblasts were first derived from the adult mammalian brains in the 1990s by Reynolds et al. Since then, persistent neurogenesis in the subgranular zone (SGZ) of the hippocampus and subventricular zone (SVZ) has gradually been recognized. To date, reviews on neuroblast migration have largely investigated glial cells and molecular signaling mechanisms, while the relationship between vasculature and cell migration remains a mystery. Thus, this paper underlines the partial biological features of neuroblast migration and unravels the significance and mechanisms of the vasculature in the process to further clarify theoretically the neural repair mechanism after brain injury. Neuroblast migration presents three modes according to the characteristics of cells that act as scaffolds during the migration process: gliophilic migration, neurophilic migration, and vasophilic migration. Many signaling molecules, including brain-derived neurotrophic factor (BDNF), stromal cell-derived factor 1 (SDF-1), vascular endothelial growth factor (VEGF), and angiopoietin-1 (Ang-1), affect vasophilic migration, synergistically regulating the migration of neuroblasts to target areas along blood vessels. However, the precise role of blood vessels in the migration of neuroblasts needs to be further explored. The in-depth study of neuroblast migration will most probably provide theoretical basis and breakthrough for the clinical treatment of brain injury diseases.
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Affiliation(s)
- Na Wu
- Department of Pediatric Surgery, Chongqing University Three Gorges Hospital, Wanzhou District, No. 165 Xincheng Road, Wanzhou District, Chongqing, 404100, China
| | - Wenlang Li
- Department of Anesthesiology, The Second Affiliated Hospital of Chongqing Medical University, Yuzhong District, Chongqing, China
| | - Qiang Chen
- Department of Pediatric Surgery, Chongqing University Three Gorges Hospital, Wanzhou District, No. 165 Xincheng Road, Wanzhou District, Chongqing, 404100, China
| | - Meng Chen
- Department of Pediatric Surgery, Chongqing University Three Gorges Hospital, Wanzhou District, No. 165 Xincheng Road, Wanzhou District, Chongqing, 404100, China
| | - Siyuan Chen
- Department of Pediatric Surgery, Chongqing University Three Gorges Hospital, Wanzhou District, No. 165 Xincheng Road, Wanzhou District, Chongqing, 404100, China
| | - Chongjie Cheng
- Department of Neurosurgery, The First Affiliated Hospital of Chongqing Medical University, Yuzhong District, Chongqing, China
| | - Yimin Xie
- Department of Pediatric Surgery, Chongqing University Three Gorges Hospital, Wanzhou District, No. 165 Xincheng Road, Wanzhou District, Chongqing, 404100, China.
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4
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Sandeep P, Sharma P, Luhach K, Dhiman N, Kharkwal H, Sharma B. Neuron navigators: A novel frontier with physiological and pathological implications. Mol Cell Neurosci 2023; 127:103905. [PMID: 37972804 DOI: 10.1016/j.mcn.2023.103905] [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: 09/12/2023] [Revised: 10/31/2023] [Accepted: 11/09/2023] [Indexed: 11/19/2023] Open
Abstract
Neuron navigators are microtubule plus-end tracking proteins containing basic and serine rich regions which are encoded by neuron navigator genes (NAVs). Neuron navigator proteins are essential for neurite outgrowth, neuronal migration, and overall neurodevelopment along with some other functions as well. The navigator proteins are substantially expressed in the developing brain and have been reported to be differentially expressed in various tissues at different ages. Over the years, the research has found neuron navigators to be implicated in a spectrum of pathological conditions such as developmental anomalies, neurodegenerative disorders, neuropathic pain, anxiety, cancers, and certain inflammatory conditions. The existing knowledge about neuron navigators remains sparse owing to their differential functions, undiscovered modulators, and unknown molecular mechanisms. Investigating the possible role of neuron navigators in various physiological processes and pathological conditions pose as a novel field that requires extensive research and might provide novel mechanistic insights and understanding of these aspects.
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Affiliation(s)
- Parth Sandeep
- Department of Pharmacology, Amity Institute of Pharmacy, Amity University, Uttar Pradesh, Noida, India
| | - Poonam Sharma
- Department of Pharmacology, Amity Institute of Pharmacy, Amity University, Uttar Pradesh, Noida, India
| | - Kanishk Luhach
- Department of Pharmacology, Amity Institute of Pharmacy, Amity University, Uttar Pradesh, Noida, India
| | - Neerupma Dhiman
- Amity Institute of Pharmacy, Amity University, Uttar Pradesh, Noida, India
| | - Harsha Kharkwal
- Amity Natural and Herbal Product Research, Amity Institute of Phytochemistry and Phytomedicine, Amity University, Uttar Pradesh, India
| | - Bhupesh Sharma
- Department of Pharmacology, Amity Institute of Pharmacy, Amity University, Uttar Pradesh, Noida, India.
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5
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Yuan WQ, Huang WP, Jiang YC, Xu H, Duan CS, Chen NH, Liu YJ, Fu XM. The function of astrocytes and their role in neurological diseases. Eur J Neurosci 2023; 58:3932-3961. [PMID: 37831013 DOI: 10.1111/ejn.16160] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Revised: 09/11/2023] [Accepted: 09/13/2023] [Indexed: 10/14/2023]
Abstract
Astrocytes have countless links with neurons. Previously, astrocytes were only considered a scaffold of neurons; in fact, astrocytes perform a variety of functions, including providing support for neuronal structures and energy metabolism, offering isolation and protection and influencing the formation, function and elimination of synapses. Because of these functions, astrocytes play an critical role in central nervous system (CNS) diseases. The regulation of the secretiory factors, receptors, channels and pathways of astrocytes can effectively inhibit the occurrence and development of CNS diseases, such as neuromyelitis optica (NMO), multiple sclerosis, Alzheimer's disease (AD), Parkinson's disease (PD) and Huntington's disease. The expression of aquaporin 4 in AS is directly related to NMO and indirectly involved in the clearance of Aβ and tau proteins in AD. Connexin 43 has a bidirectional effect on glutamate diffusion at different stages of stroke. Interestingly, astrocytes reduce the occurrence of PD through multiple effects such as secretion of related factors, mitochondrial autophagy and aquaporin 4. Therefore, this review is focused on the structure and function of astrocytes and the correlation between astrocytes and CNS diseases and drug treatment to explore the new functions of astrocytes with the astrocytes as the target. This, in turn, would provide a reference for the development of new drugs to protect neurons and promote the recovery of nerve function.
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Affiliation(s)
- Wen-Qin Yuan
- College of Pharmacy, Jiangxi University of Chinese Medicine, Nanchang, China
| | - Wei-Peng Huang
- State Key Laboratory of Bioactive Substances and Functions of Natural Medicines, Institute of Materia Medica and Neuroscience Center, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
- College of Pharmacy, Minzu University of China, Beijing, China
| | - Yang-Chao Jiang
- College of Pharmacy, Jiangxi University of Chinese Medicine, Nanchang, China
| | - Hao Xu
- College of Economics and Management, Jiangxi University of Chinese Medicine, Nanchang, China
| | - Chong-Shen Duan
- College of Pharmacy, Jiangxi University of Chinese Medicine, Nanchang, China
| | - Nai-Hong Chen
- State Key Laboratory of Bioactive Substances and Functions of Natural Medicines, Institute of Materia Medica and Neuroscience Center, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Ying-Jiao Liu
- College of Pharmacy, Jiangxi University of Chinese Medicine, Nanchang, China
| | - Xiao-Mei Fu
- College of Pharmacy, Jiangxi University of Chinese Medicine, Nanchang, China
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6
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Sutlive J, Seyyedhosseinzadeh H, Ao Z, Xiu H, Choudhury S, Gou K, Guo F, Chen Z. Mechanics of morphogenesis in neural development: In vivo, in vitro, and in silico. BRAIN MULTIPHYSICS 2023. [DOI: 10.1016/j.brain.2022.100062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
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7
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Li M, Gao L, Zhao L, Zou T, Xu H. Toward the next generation of vascularized human neural organoids. Med Res Rev 2023; 43:31-54. [PMID: 35993813 DOI: 10.1002/med.21922] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2021] [Revised: 02/22/2022] [Accepted: 08/09/2022] [Indexed: 02/04/2023]
Abstract
Thanks to progress in the development of three-dimensional (3D) culture technologies, human central nervous system (CNS) development and diseases have been gradually deciphered by using organoids derived from human embryonic stem cells (hESCs) or human induced pluripotent stem cells (hiPSCs). Selforganized neural organoids (NOs) have been used to mimic morphogenesis and functions of specific organs in vitro. Many NOs have been reproduced in vitro, such as those mimicking the human brain, retina, and spinal cord. However, NOs fail to capitulate to the maturation and complexity of in vivo neural tissues. The persistent issues with current NO cultivation protocols are inadequate oxygen supply and nutrient diffusion due to the absence of vascular networks. In vivo, the developing CNS is interpenetrated by vasculature that not only supplies oxygen and nutrients but also provides a structural template for neuronal growth. To address these deficiencies, recent studies have begun to couple NO culture with bioengineering techniques and methodologies, including genetic engineering, coculture, multidifferentiation, microfluidics and 3D bioprinting, and transplantation, which might promote NO maturation and create more functional NOs. These cutting-edge methods could generate an ever more reliable NO model in vitro for deciphering the codes of human CNS development, disease progression, and translational application. In this review, we will summarize recent technological advances in culture strategies to generate vascularized NOs (vNOs), with a special focus on cerebral- and retinal-organoid models.
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Affiliation(s)
- Minghui Li
- Southwest Hospital/Southwest Eye Hospital, Third Military Medical University (Army Medical University), Chongqing, China.,Key Lab of Visual Damage and Regeneration & Restoration of Chongqing, Chongqing, China
| | - Lixiong Gao
- Department of Ophthalmology, Third Medical Center of PLA General Hospital, Beijing, China
| | - Ling Zhao
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, China
| | - Ting Zou
- Southwest Hospital/Southwest Eye Hospital, Third Military Medical University (Army Medical University), Chongqing, China.,Key Lab of Visual Damage and Regeneration & Restoration of Chongqing, Chongqing, China
| | - Haiwei Xu
- Southwest Hospital/Southwest Eye Hospital, Third Military Medical University (Army Medical University), Chongqing, China.,Key Lab of Visual Damage and Regeneration & Restoration of Chongqing, Chongqing, China
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8
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Hernandez S, Serrano AG, Solis Soto LM. The Role of Nerve Fibers in the Tumor Immune Microenvironment of Solid Tumors. Adv Biol (Weinh) 2022; 6:e2200046. [PMID: 35751462 DOI: 10.1002/adbi.202200046] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2022] [Revised: 04/12/2022] [Indexed: 01/28/2023]
Abstract
The importance of neurons and nerve fibers in the tumor microenvironment (TME) of solid tumors is now acknowledged after being unexplored for a long time; this is possible due to the development of new technologies that allow in situ characterization of the TME. Recent studies have shown that the density and types of nerves that innervate tumors can predict a patient's clinical outcome and drive several processes of tumor biology. Nowadays, several efforts in cancer research and neuroscience are taking place to elucidate the mechanisms that drive tumor-associated innervation and nerve-tumor and nerve-immune interaction. Assessment of neurons and nerves within the context of the TME can be performed in situ, in tumor tissue, using several pathology-based strategies that utilize histochemical and immunohistochemistry principles, hi-plex technologies, and computational pathology approaches to identify measurable histopathological characteristics of nerves. These features include the number and type of tumor associated nerves, topographical location and microenvironment of neural invasion of malignant cells, and investigation of neuro-related biomarker expression in nerves, tumor cells, and cells of the TME. A deeper understanding of these complex interactions and the impact of nerves in tumor biology will guide the design of better strategies for targeted therapy in clinical trials.
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Affiliation(s)
- Sharia Hernandez
- Department of Translational Molecular Pathology, The University of Texas MD Anderson Cancer Center, 2130 West Holcombe Boulevard, Houston, TX, 77030, USA
| | - Alejandra G Serrano
- Department of Translational Molecular Pathology, The University of Texas MD Anderson Cancer Center, 2130 West Holcombe Boulevard, Houston, TX, 77030, USA
| | - Luisa M Solis Soto
- Department of Translational Molecular Pathology, The University of Texas MD Anderson Cancer Center, 2130 West Holcombe Boulevard, Houston, TX, 77030, USA
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9
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Yan Y, Dai W, Mei Q. Multicentric Glioma: An Ideal Model to Reveal the Mechanism of Glioma. Front Oncol 2022; 12:798018. [PMID: 35747806 PMCID: PMC9209746 DOI: 10.3389/fonc.2022.798018] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2021] [Accepted: 05/02/2022] [Indexed: 11/13/2022] Open
Abstract
As a special type of glioma, multicentric glioma provides an ideal pathological model for glioma research. According to the stem-cell-origin theory, multiple lesions of multicentric glioma share the same neuro-oncological origin, both in gene level and in cell level. Although the number of studies focusing on genetic evolution in gliomas with the model of multicentric gliomas were limited, some mutations, including IDH1 mutations, TERTp mutations and PTEN deletions, are found to be at an early stage in the process of genetic aberrance during glioma evolution based on the results of these studies. This article reviews the clinical reports and genetic studies of multicentric glioma, and intends to explain the various clinical phenomena of multicentric glioma from the perspective of genetic aberrance accumulation and tumor cell evolution. The malignant degree of a glioma is determined by both the tumorigenicity of early mutant genes, and the stemness of early suffered cells.
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Affiliation(s)
- Yong Yan
- Departmentof Neurosurgery, Changzheng Hospital, Naval Medical University, Shanghai, China
| | - Wei Dai
- Departmentof Neurosurgery, Changzheng Hospital, Naval Medical University, Shanghai, China
| | - Qiyong Mei
- Departmentof Neurosurgery, Changzheng Hospital, Naval Medical University, Shanghai, China
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10
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Mader S, Brimberg L, Vo A, Strohl JJ, Crawford JM, Bonnin A, Carrión J, Campbell D, Huerta TS, La Bella A, Berlin R, Dewey SL, Hellman M, Eidelberg D, Dujmovic I, Drulovic J, Bennett JL, Volpe BT, Huerta PT, Diamond B. In utero exposure to maternal anti-aquaporin-4 antibodies alters brain vasculature and neural dynamics in male mouse offspring. Sci Transl Med 2022; 14:eabe9726. [PMID: 35442708 PMCID: PMC9973562 DOI: 10.1126/scitranslmed.abe9726] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
The fetal brain is constantly exposed to maternal IgG before the formation of an effective blood-brain barrier (BBB). Here, we studied the consequences of fetal brain exposure to an antibody to the astrocytic protein aquaporin-4 (AQP4-IgG) in mice. AQP4-IgG was cloned from a patient with neuromyelitis optica spectrum disorder (NMOSD), an autoimmune disease that can affect women of childbearing age. We found that embryonic radial glia cells in neocortex express AQP4. These cells are critical for blood vessel and BBB formation through modulation of the WNT signaling pathway. Male fetuses exposed to AQP4-IgG had abnormal cortical vasculature and lower expression of WNT signaling molecules Wnt5a and Wnt7a. Positron emission tomography of adult male mice exposed in utero to AQP4-IgG revealed increased blood flow and BBB leakiness in the entorhinal cortex. Adult male mice exposed in utero to AQP4-IgG had abnormal cortical vessels, fewer dendritic spines in pyramidal and stellate neurons, and more S100β+ astrocytes in the entorhinal cortex. Behaviorally, they showed impairments in the object-place memory task. Neural recordings indicated that their grid cell system, within the medial entorhinal cortex, did not map the local environment appropriately. Collectively, these data implicate in utero binding of AQP4-IgG to radial glia cells as a mechanism for alterations of the developing male brain and adds NMOSD to the conditions in which maternal IgG may cause persistent brain dysfunction in offspring.
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Affiliation(s)
- Simone Mader
- The Feinstein Institutes for Medical Research, Northwell Health, Manhasset NY 11030, USA.,Institute of Clinical Neuroimmunology, Biomedical Center of the Ludwig Maximilian University of Munich, Munich 82152, Germany.,Corresponding author
| | - Lior Brimberg
- The Feinstein Institutes for Medical Research, Northwell Health, Manhasset NY 11030, USA
| | - An Vo
- The Feinstein Institutes for Medical Research, Northwell Health, Manhasset NY 11030, USA
| | - Joshua J. Strohl
- The Feinstein Institutes for Medical Research, Northwell Health, Manhasset NY 11030, USA.,Department of Molecular Medicine, Zucker School of Medicine at Hofstra/Northwell, Manhasset, NY 11030, USA
| | - James M. Crawford
- Department of Pathology and Laboratory Medicine, Northwell Health, Manhasset, NY 11030, USA
| | - Alexandre Bonnin
- Department of Physiology and Neurosciences, Zilkha Neurogenetic Institute, University of Southern California, Keck School of Medicine, Los Angeles, CA 90033, USA
| | - Joseph Carrión
- The Feinstein Institutes for Medical Research, Northwell Health, Manhasset NY 11030, USA
| | - Delcora Campbell
- The Feinstein Institutes for Medical Research, Northwell Health, Manhasset NY 11030, USA
| | - Tomás S. Huerta
- The Feinstein Institutes for Medical Research, Northwell Health, Manhasset NY 11030, USA.,Department of Molecular Medicine, Zucker School of Medicine at Hofstra/Northwell, Manhasset, NY 11030, USA
| | - Andrea La Bella
- The Feinstein Institutes for Medical Research, Northwell Health, Manhasset NY 11030, USA
| | - Roseann Berlin
- The Feinstein Institutes for Medical Research, Northwell Health, Manhasset NY 11030, USA
| | - Stephen L. Dewey
- The Feinstein Institutes for Medical Research, Northwell Health, Manhasset NY 11030, USA
| | - Matthew Hellman
- The Feinstein Institutes for Medical Research, Northwell Health, Manhasset NY 11030, USA
| | - David Eidelberg
- The Feinstein Institutes for Medical Research, Northwell Health, Manhasset NY 11030, USA
| | - Irena Dujmovic
- Clinical Center of Serbia University School of Medicine, Belgrade, 11000, Serbia.,Department of Neurology, University of North Carolina, School of Medicine, Chapel Hill, NC 27517, USA
| | - Jelena Drulovic
- Clinical Center of Serbia University School of Medicine, Belgrade, 11000, Serbia
| | - Jeffrey L. Bennett
- Department of Neurology and Ophthalmology, Programs in Neuroscience and Immunology, University of Colorado Denver, School of Medicine, Denver, CO 80045, USA
| | - Bruce T. Volpe
- The Feinstein Institutes for Medical Research, Northwell Health, Manhasset NY 11030, USA
| | - Patricio T. Huerta
- The Feinstein Institutes for Medical Research, Northwell Health, Manhasset NY 11030, USA.,Department of Molecular Medicine, Zucker School of Medicine at Hofstra/Northwell, Manhasset, NY 11030, USA
| | - Betty Diamond
- The Feinstein Institutes for Medical Research, Northwell Health, Manhasset NY 11030, USA
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11
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Shabani Z, Rahbarghazi R, Karimipour M, Ghadiri T, Salehi R, Sadigh‐Eteghad S, Farhoudi M. Transplantation of bioengineered Reelin-loaded PLGA/PEG micelles can accelerate neural tissue regeneration in photothrombotic stroke model of mouse. Bioeng Transl Med 2021; 7:e10264. [PMID: 35111956 PMCID: PMC8780906 DOI: 10.1002/btm2.10264] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2021] [Revised: 09/20/2021] [Accepted: 10/16/2021] [Indexed: 01/09/2023] Open
Abstract
Ischemic stroke is characterized by extensive neuronal loss, glial scar formation, neural tissue degeneration that leading to profound changes in the extracellular matrix, neuronal circuitry, and long-lasting functional disabilities. Although transplanted neural stem cells (NSCs) can recover some of the functional deficit after stroke, retrieval is not complete and repair of lost tissue is negligible. Therefore, the current challenge is to use the combination of NSCs with suitably enriched biomaterials to retain these cells within the infarct cavity and accelerate the formation of a de novo tissue. This study aimed to test the regenerative potential of polylactic-co-glycolic acid-polyethylene glycol (PLGA-PEG) micelle biomaterial enriched with Reelin and embryonic NSCs on photothrombotic stroke model of mice to gain appropriate methods in tissue engineering. For this purpose, two sets of experiments, either in vitro or in vivo models, were performed. In vitro analyses exhibited PLGA-PEG plus Reelin-induced proliferation rate (Ki-67+ NSCs) and neurite outgrowth (axonization and dendritization) compared to PLGA-PEG + NSCs and Reelin + NSCs groups (p < 0.05). Besides, neural differentiation (Map-2+ cells) was high in NSCs cultured in the presence of Reelin-loaded PLGA-PEG micelles (p < 0.05). Double immunofluorescence staining showed that Reelin-loaded PLGA-PEG micelles increased the number of migrating neural progenitor cells (DCX+ cells) and mature neurons (NeuN+ cells) around the lesion site compared to the groups received PLGA-PEG and Reelin alone after 1 month (p < 0.05). Immunohistochemistry results showed that the PLGA/PEG plus Reelin significantly decreased the astrocytic gliosis and increased local angiogenesis (vWF-positive cells) relative to the other groups. These changes led to the reduction of cavity size in the Reelin-loaded PLGA-PEG+NSCs group. Neurobehavioral tests indicated Reelin-loaded PLGA-PEG+NSCs promoted neurological outcome and functional recovery (p < 0.05). These results indicated that Reelin-loaded PLGA-PEG is capable of promoting NSCs dynamic growth, neuronal differentiation, and local angiogenesis following ischemic injury via providing a desirable microenvironment. These features can lead to neural tissue regeneration and functional recovery.
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Affiliation(s)
- Zahra Shabani
- Neurosciences Research Center (NSRC)Tabriz University of Medical SciencesTabrizIran,Department of Neurosciences, Faculty of Advanced Medical SciencesTabriz University of Medical SciencesTabrizIran
| | - Reza Rahbarghazi
- Stem Cell Research CenterTabriz University of Medical SciencesTabrizIran,Department of Applied Cell Sciences, Faculty of Advanced Medical SciencesTabriz University of Medical SciencesTabrizIran
| | - Mohammad Karimipour
- Department of Neurosciences, Faculty of Advanced Medical SciencesTabriz University of Medical SciencesTabrizIran,Department of Anatomical Sciences, Faculty of MedicineTabriz University of Medical SciencesTabrizIran
| | - Tahereh Ghadiri
- Department of Neurosciences, Faculty of Advanced Medical SciencesTabriz University of Medical SciencesTabrizIran
| | - Roya Salehi
- Department of Medical Nanotechnology, Faculty of Advanced Medical SciencesTabriz University of Medical SciencesTabrizIran
| | - Saeed Sadigh‐Eteghad
- Neurosciences Research Center (NSRC)Tabriz University of Medical SciencesTabrizIran
| | - Mehdi Farhoudi
- Neurosciences Research Center (NSRC)Tabriz University of Medical SciencesTabrizIran
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12
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Yang Y, Zhou X, Liu X, Song R, Gao Y, Wang S. Implications of FBXW7 in Neurodevelopment and Neurodegeneration: Molecular Mechanisms and Therapeutic Potential. Front Cell Neurosci 2021; 15:736008. [PMID: 34512273 PMCID: PMC8424092 DOI: 10.3389/fncel.2021.736008] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2021] [Accepted: 08/04/2021] [Indexed: 11/25/2022] Open
Abstract
The ubiquitin-proteasome system (UPS) mediated protein degradation is crucial to maintain quantitive and functional homeostasis of diverse proteins. Balanced cellular protein homeostasis controlled by UPS is fundamental to normal neurological functions while impairment of UPS can also lead to some neurodevelopmental and neurodegenerative disorders. Functioning as the substrate recognition component of the SCF-type E3 ubiquitin ligase, FBXW7 is essential to multiple aspects of cellular processes via targeting a wide range of substrates for proteasome-mediated degradation. Accumulated evidence shows that FBXW7 is fundamental to neurological functions and especially implicated in neurodevelopment and the nosogenesis of neurodegeneration. In this review, we describe general features of FBXW7 gene and proteins, and mainly present recent findings that highlight the vital roles and molecular mechanisms of FBXW7 in neurodevelopment such as neurogenesis, myelination and cerebral vasculogenesis and in the pathogenesis of some typical neurodegenerative disorders such as Alzheimer’s disease, Parkinson’s disease and Huntington’s disease. Additionally, we also provide a prospect on focusing FBXW7 as a potential therapeutic target to rescue neurodevelopmental and neurodegenerative impairment.
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Affiliation(s)
- Yu Yang
- Shandong Collaborative Innovation Center for Diagnosis, Treatment and Behavioral Interventions of Mental Disorders, Institute of Mental Health, Jining Medical University, Jining, China.,Shandong Key Laboratory of Behavioral Medicine, School of Mental Health, Jining Medical University, Jining, China
| | - Xuan Zhou
- Shandong Key Laboratory of Behavioral Medicine, School of Mental Health, Jining Medical University, Jining, China.,Research Center for Quality of Life and Applied Psychology, School of Humanities and Management, Guangdong Medical University, Dongguan, China
| | - Xinpeng Liu
- Shandong Collaborative Innovation Center for Diagnosis, Treatment and Behavioral Interventions of Mental Disorders, Institute of Mental Health, Jining Medical University, Jining, China.,Shandong Key Laboratory of Behavioral Medicine, School of Mental Health, Jining Medical University, Jining, China
| | - Ruying Song
- Shandong Collaborative Innovation Center for Diagnosis, Treatment and Behavioral Interventions of Mental Disorders, Institute of Mental Health, Jining Medical University, Jining, China.,Shandong Key Laboratory of Behavioral Medicine, School of Mental Health, Jining Medical University, Jining, China
| | - Yiming Gao
- Shandong Collaborative Innovation Center for Diagnosis, Treatment and Behavioral Interventions of Mental Disorders, Institute of Mental Health, Jining Medical University, Jining, China.,Shandong Key Laboratory of Behavioral Medicine, School of Mental Health, Jining Medical University, Jining, China
| | - Shuai Wang
- Shandong Collaborative Innovation Center for Diagnosis, Treatment and Behavioral Interventions of Mental Disorders, Institute of Mental Health, Jining Medical University, Jining, China.,Shandong Key Laboratory of Behavioral Medicine, School of Mental Health, Jining Medical University, Jining, China
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13
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Freitas-Andrade M, Raman-Nair J, Lacoste B. Structural and Functional Remodeling of the Brain Vasculature Following Stroke. Front Physiol 2020; 11:948. [PMID: 32848875 PMCID: PMC7433746 DOI: 10.3389/fphys.2020.00948] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Accepted: 07/14/2020] [Indexed: 12/12/2022] Open
Abstract
Maintenance of cerebral blood vessel integrity and regulation of cerebral blood flow ensure proper brain function. The adult human brain represents only a small portion of the body mass, yet about a quarter of the cardiac output is dedicated to energy consumption by brain cells at rest. Due to a low capacity to store energy, brain health is heavily reliant on a steady supply of oxygen and nutrients from the bloodstream, and is thus particularly vulnerable to stroke. Stroke is a leading cause of disability and mortality worldwide. By transiently or permanently limiting tissue perfusion, stroke alters vascular integrity and function, compromising brain homeostasis and leading to widespread consequences from early-onset motor deficits to long-term cognitive decline. While numerous lines of investigation have been undertaken to develop new pharmacological therapies for stroke, only few advances have been made and most clinical trials have failed. Overall, our understanding of the acute and chronic vascular responses to stroke is insufficient, yet a better comprehension of cerebrovascular remodeling following stroke is an essential prerequisite for developing novel therapeutic options. In this review, we present a comprehensive update on post-stroke cerebrovascular remodeling, an important and growing field in neuroscience, by discussing cellular and molecular mechanisms involved, sex differences, limitations of preclinical research design and future directions.
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Affiliation(s)
| | - Joanna Raman-Nair
- Neuroscience Program, Ottawa Hospital Research Institute, Ottawa, ON, Canada
| | - Baptiste Lacoste
- Neuroscience Program, Ottawa Hospital Research Institute, Ottawa, ON, Canada
- Department of Cellular and Molecular Medicine, Faculty of Medicine, University of Ottawa, Ottawa, ON, Canada
- Brain and Mind Research Institute, University of Ottawa, Ottawa, ON, Canada
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14
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Accogli A, Severino M, Riva A, Madia F, Balagura G, Iacomino M, Carlini B, Baldassari S, Giacomini T, Croci C, Pisciotta L, Messana T, Boni A, Russo A, Bilo L, Tonziello R, Coppola A, Filla A, Mecarelli O, Casalone R, Pisani F, Falsaperla R, Marino S, Parisi P, Ferretti A, Elia M, Luchetti A, Milani D, Vanadia F, Silvestri L, Rebessi E, Parente E, Vatti G, Mancardi MM, Nobili L, Capra V, Salpietro V, Striano P, Zara F. Targeted re-sequencing in malformations of cortical development: genotype-phenotype correlations. Seizure 2020; 80:145-152. [DOI: 10.1016/j.seizure.2020.05.023] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2020] [Revised: 05/15/2020] [Accepted: 05/29/2020] [Indexed: 12/25/2022] Open
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15
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Segarra M, Aburto MR, Hefendehl J, Acker-Palmer A. Neurovascular Interactions in the Nervous System. Annu Rev Cell Dev Biol 2020; 35:615-635. [PMID: 31590587 DOI: 10.1146/annurev-cellbio-100818-125142] [Citation(s) in RCA: 57] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Molecular cross talk between the nervous and vascular systems is necessary to maintain the correct coupling of organ structure and function. Molecular pathways shared by both systems are emerging as major players in the communication of the neuronal compartment with the endothelium. Here we review different aspects of this cross talk and how vessels influence the development and homeostasis of the nervous system. Beyond the classical role of the vasculature as a conduit to deliver oxygen and metabolites needed for the energy-demanding neuronal compartment, vessels emerge as powerful signaling systems that control and instruct a variety of cellular processes during the development of neurons and glia, such as migration, differentiation, and structural connectivity. Moreover, a broad spectrum of mild to severe vascular dysfunctions occur in various pathologies of the nervous system, suggesting that mild structural and functional changes at the neurovascular interface may underlie cognitive decline in many of these pathological conditions.
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Affiliation(s)
- Marta Segarra
- Neuro and Vascular Guidance, Buchmann Institute for Molecular Life Sciences, University of Frankfurt, D-60438 Frankfurt am Main, Germany; , .,Institute of Cell Biology and Neuroscience, University of Frankfurt, D-60438 Frankfurt am Main, Germany
| | - Maria R Aburto
- Neuro and Vascular Guidance, Buchmann Institute for Molecular Life Sciences, University of Frankfurt, D-60438 Frankfurt am Main, Germany; , .,Institute of Cell Biology and Neuroscience, University of Frankfurt, D-60438 Frankfurt am Main, Germany
| | - Jasmin Hefendehl
- Neurovascular Disorders, Buchmann Institute for Molecular Life Sciences, University of Frankfurt, D-60438 Frankfurt am Main, Germany.,Institute of Cell Biology and Neuroscience, University of Frankfurt, D-60438 Frankfurt am Main, Germany
| | - Amparo Acker-Palmer
- Neuro and Vascular Guidance, Buchmann Institute for Molecular Life Sciences, University of Frankfurt, D-60438 Frankfurt am Main, Germany; , .,Institute of Cell Biology and Neuroscience, University of Frankfurt, D-60438 Frankfurt am Main, Germany.,Max Planck Institute for Brain Research, D-60438 Frankfurt am Main, Germany
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16
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Intraventricular Hemorrhage in a Single Fetus of Dichorionic-Diamniotic Gestation: A Case Report and Review of Literature. JOURNAL OF FETAL MEDICINE 2020. [DOI: 10.1007/s40556-020-00255-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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17
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Visualization of T Cell Migration in the Spleen Reveals a Network of Perivascular Pathways that Guide Entry into T Zones. Immunity 2020; 52:794-807.e7. [PMID: 32298648 PMCID: PMC7237890 DOI: 10.1016/j.immuni.2020.03.010] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2019] [Revised: 01/28/2020] [Accepted: 03/18/2020] [Indexed: 02/02/2023]
Abstract
Lymphocyte homeostasis and immune surveillance require that T and B cells continuously recirculate between secondary lymphoid organs. Here, we used intravital microscopy to define lymphocyte trafficking routes within the spleen, an environment of open blood circulation and shear forces unlike other lymphoid organs. Upon release from arterioles into the red pulp sinuses, T cells latched onto perivascular stromal cells in a manner that was independent of the chemokine receptor CCR7 but sensitive to Gi protein-coupled receptor inhibitors. This latching sheltered T cells from blood flow and enabled unidirectional migration to the bridging channels and then to T zones, entry into which required CCR7. Inflammatory responses modified the chemotactic cues along the perivascular homing paths, leading to rapid block of entry. Our findings reveal a role for vascular structures in lymphocyte recirculation through the spleen, indicating the existence of separate entry and exit routes and that of a checkpoint located at the gate to the T zone. Perivascular pathways support T cell entry into splenic T zones, but not egress from them Attachment to the homing paths requires activation of GPCRs other than CCR7 CCR7 mediates one-directional migration and entry into T zones Inflammation leads to modification of the homing paths and to rapid block of entry
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18
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Schaffenrath J, Keller A. New Insights in the Complexity and Functionality of the Neurovascular Unit. Handb Exp Pharmacol 2020; 273:33-57. [PMID: 33582883 DOI: 10.1007/164_2020_424] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
The neurovascular unit (NVU) encompasses all brain cells and underlines that neurons, glia and brain vasculature are in intimate physical and functional association. Brain function is dependent on blood flow and local increases in blood flow in response to neural activity - functional hyperaemia takes place at the NVU. Although this is a vital function of the NVU, many studies have demonstrated that the NVU also performs other tasks. Blood vessels in the brain, which are composed of multiple cell types, are essential for correct brain development. They constitute the niche for brain stem cells, sense the environment and communicate changes to neural tissue, and control the immune quiescence of the CNS. In this brief chapter we will discuss new insights into the biology of NVU, which have further revealed the heterogeneity and complexity of the vascular tree and its neurovascular associations.
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Affiliation(s)
- Johanna Schaffenrath
- Department of Neurosurgery, Clinical Neuroscience Center, Zurich Neuroscience Center, Zurich University Hospital, Zurich University, Zurich, Switzerland
| | - Annika Keller
- Department of Neurosurgery, Clinical Neuroscience Center, Zurich Neuroscience Center, Zurich University Hospital, Zurich University, Zurich, Switzerland.
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19
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Mendes de Lima C, Douglas Corrêa Pereira P, Pereira Henrique E, Augusto de Oliveira M, Carvalho Paulo D, Silva de Siqueira L, Guerreiro Diniz D, Almeida Miranda D, André Damasceno de Melo M, Gyzely de Morais Magalhães N, Francis Sherry D, Wanderley Picanço Diniz C, Guerreiro Diniz C. Differential Change in Hippocampal Radial Astrocytes and Neurogenesis in Shorebirds With Contrasting Migratory Routes. Front Neuroanat 2019; 13:82. [PMID: 31680881 PMCID: PMC6798042 DOI: 10.3389/fnana.2019.00082] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2019] [Accepted: 08/28/2019] [Indexed: 12/30/2022] Open
Abstract
Little is known about environmental influences on radial glia-like (RGL) α cells (radial astrocytes) and their relation to neurogenesis. Because radial glia is involved in adult neurogenesis and astrogenesis, we investigated this association in two migratory shorebird species that complete their autumnal migration using contrasting strategies. Before their flights to South America, the birds stop over at the Bay of Fundy in Canada. From there, the semipalmated sandpiper (Calidris pusilla) crosses the Atlantic Ocean in a non-stop 5-day flight, whereas the semipalmated plover (Charadrius semipalmatus) flies primarily overland with stopovers for rest and feeding. From the hierarchical cluster analysis of multimodal morphometric features, followed by the discriminant analysis, the radial astrocytes were classified into two main morphotypes, Type I and Type II. After migration, we detected differential changes in the morphology of these cells that were more intense in Type I than in Type II in both species. We also compared the number of doublecortin (DCX)-immunolabeled neurons with morphometric features of radial glial-like α cells in the hippocampal V region between C. pusilla and C. semipalmatus before and after autumn migration. Compared to migrating birds, the convex hull surface area of radial astrocytes increased significantly in wintering individuals in both C. semipalmatus and C. pusilla. Although to a different extent we found a strong correlation between the increase in the convex hull surface area and the increase in the total number of DCX immunostained neurons in both species. Despite phylogenetic differences, it is of interest to note that the increased morphological complexity of radial astrocytes in C. semipalmatus coincides with the fact that during the migratory process over the continent, the visuospatial environment changes more intensely than that associated with migration over Atlantic. The migratory flight of the semipalmated plover, with stopovers for feeding and rest, vs. the non-stop flight of the semipalmated sandpiper may differentially affect radial astrocyte morphology and neurogenesis.
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Affiliation(s)
- Camila Mendes de Lima
- Laboratório de Investigações em Neurodegeneração e Infecção no Hospital Universitário João de Barros Barreto, Instituto de Ciências Biológicas, Universidade Federal do Pará, Belém, Brazil
| | - Patrick Douglas Corrêa Pereira
- Laboratório de Biologia Molecular e Neuroecologia, Instituto Federal de Educação Ciência e Tecnologia do Pará, Campus Bragança, Bragança, Brazil
| | - Ediely Pereira Henrique
- Laboratório de Biologia Molecular e Neuroecologia, Instituto Federal de Educação Ciência e Tecnologia do Pará, Campus Bragança, Bragança, Brazil
| | - Marcus Augusto de Oliveira
- Laboratório de Investigações em Neurodegeneração e Infecção no Hospital Universitário João de Barros Barreto, Instituto de Ciências Biológicas, Universidade Federal do Pará, Belém, Brazil
| | - Dario Carvalho Paulo
- Laboratório de Investigações em Neurodegeneração e Infecção no Hospital Universitário João de Barros Barreto, Instituto de Ciências Biológicas, Universidade Federal do Pará, Belém, Brazil
| | - Lucas Silva de Siqueira
- Laboratório de Biologia Molecular e Neuroecologia, Instituto Federal de Educação Ciência e Tecnologia do Pará, Campus Bragança, Bragança, Brazil
| | - Daniel Guerreiro Diniz
- Laboratório de Investigações em Neurodegeneração e Infecção no Hospital Universitário João de Barros Barreto, Instituto de Ciências Biológicas, Universidade Federal do Pará, Belém, Brazil.,Laboratório de Biologia Molecular e Neuroecologia, Instituto Federal de Educação Ciência e Tecnologia do Pará, Campus Bragança, Bragança, Brazil
| | - Diego Almeida Miranda
- Laboratório de Biologia Molecular e Neuroecologia, Instituto Federal de Educação Ciência e Tecnologia do Pará, Campus Bragança, Bragança, Brazil
| | - Mauro André Damasceno de Melo
- Laboratório de Biologia Molecular e Neuroecologia, Instituto Federal de Educação Ciência e Tecnologia do Pará, Campus Bragança, Bragança, Brazil
| | - Nara Gyzely de Morais Magalhães
- Laboratório de Investigações em Neurodegeneração e Infecção no Hospital Universitário João de Barros Barreto, Instituto de Ciências Biológicas, Universidade Federal do Pará, Belém, Brazil
| | - David Francis Sherry
- Advanced Facility for Avian Research, Department of Psychology, University of Western Ontario, London, ON, Canada
| | - Cristovam Wanderley Picanço Diniz
- Laboratório de Investigações em Neurodegeneração e Infecção no Hospital Universitário João de Barros Barreto, Instituto de Ciências Biológicas, Universidade Federal do Pará, Belém, Brazil
| | - Cristovam Guerreiro Diniz
- Laboratório de Investigações em Neurodegeneração e Infecção no Hospital Universitário João de Barros Barreto, Instituto de Ciências Biológicas, Universidade Federal do Pará, Belém, Brazil.,Laboratório de Biologia Molecular e Neuroecologia, Instituto Federal de Educação Ciência e Tecnologia do Pará, Campus Bragança, Bragança, Brazil
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20
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Abstract
Translational research requires reliable biomedical microdevices (BMMD)
to mimic physiological conditions and answer biological questions. In this work, we
introduce a reversibly sealed quick-fit hybrid BMMD that is operator-friendly and
bubble-free, requires low reagent and cell consumption, enables robust and high
throughput performance for biomedical experiments. Specifically, we fabricate a
quick-fit poly(methyl methacrylate) and poly(dimethyl siloxane) (PMMA/PDMS)
prototype to illustrate its utilities by probing the adhesion of glioblastoma cells
(T98G and U251MG) to primary endothelial cells. In static condition, we confirm that
angiopoietin-Tie2 signaling increases the adhesion of glioblastoma cells to
endothelial cells. Next, to mimic the physiological hemodynamic flow and investigate
the effect of physiological electric field, the endothelial cells are
pre-conditioned with concurrent shear flow (with fixed 1 Pa shear stress) and direct
current electric field (dcEF) in the quick-fit PMMA/PDMS BMMD. With shear flow
alone, endothelial cells exhibit classical parallel alignment; while under a
concurrent dcEF, the cells align perpendicularly to the electric current when the
dcEF is greater than 154 V m− 1. Moreover, with fixed
shear stress of 1 Pa, T98G glioblastoma cells demonstrate increased adhesion to
endothelial cells conditioned in dcEF of 154 V m− 1,
while U251MG glioblastoma cells show no difference. The quick-fit hybrid BMMD
provides a simple and flexible platform to create multiplex systems, making it
possible to investigate complicated biological conditions for translational
research.
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Affiliation(s)
- Hsieh-Fu Tsai
- Micro/Bio/Nanofluidics Unit, Okinawa Institute of Science and Technology Graduate University, 1919-1 Tancha, Onna-son, Okinawa, 9040495, Japan.
| | - Kazumi Toda-Peters
- Micro/Bio/Nanofluidics Unit, Okinawa Institute of Science and Technology Graduate University, 1919-1 Tancha, Onna-son, Okinawa, 9040495, Japan
| | - Amy Q Shen
- Micro/Bio/Nanofluidics Unit, Okinawa Institute of Science and Technology Graduate University, 1919-1 Tancha, Onna-son, Okinawa, 9040495, Japan.
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21
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Matsuo K, Ji S, Miya A, Yoda M, Hamada Y, Tanaka T, Takao-Kawabata R, Kawaai K, Kuroda Y, Shibata S. Innervation of the tibial epiphysis through the intercondylar foramen. Bone 2019; 120:297-304. [PMID: 30439572 DOI: 10.1016/j.bone.2018.11.007] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/16/2018] [Revised: 11/09/2018] [Accepted: 11/12/2018] [Indexed: 02/07/2023]
Abstract
The periosteum and mineralized bone are innervated by nerves that sense pain. These include both myelinated and unmyelinated neurons with either free nerve endings or bearing nociceptors. Parasympathetic and sympathetic autonomic nerves also innervate bone. However, little is known about the route sensory nerves take leaving the epiphyses of long bones at the adult knee joint. Here, we used transgenic mice that express fluorescent Venus protein in Schwann cells (Sox10-Venus mice) to visualize myelinated and unmyelinated nerves in the tibial epiphysis. Immunofluorescence to detect a pan-neuronal marker and the sensory neuron markers calcitonin gene-related peptide (CGRP) and tropomyosin receptor kinase A (TrkA) also revealed Schwann cell-associated sensory neurons. Foramina in the intercondylar area of the tibia were conserved between rodents and primates. Venus-labeled fibers were detected within bone marrow of the proximal epiphysis, exited through foramina along with blood vessels in the intercondylar area of the tibia, and joined Venus-labeled fibers of the synovial membrane and meniscus. These data suggest that innervation of the subchondral plate and trabecular bone within the tibial epiphysis carries pain signals from the knee joint to the brain through intercondylar foramina.
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Affiliation(s)
- Koichi Matsuo
- Laboratory of Cell and Tissue Biology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo 160-8582, Japan.
| | - Shuting Ji
- Laboratory of Cell and Tissue Biology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo 160-8582, Japan
| | - Ayako Miya
- Laboratory of Cell and Tissue Biology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo 160-8582, Japan
| | - Masaki Yoda
- Laboratory of Cell and Tissue Biology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo 160-8582, Japan
| | - Yuzuru Hamada
- Morphology Section, Primate Research Institute, Kyoto University, 41 Kanrin, Inuyama 484-8506, Japan
| | - Tomoya Tanaka
- Pharmaceuticals Research Center, Asahi Kasei Pharma Corporation, 632-1 Mifuku, Izunokuni, Shizuoka 410-2321, Japan
| | - Ryoko Takao-Kawabata
- Pharmaceuticals Research Center, Asahi Kasei Pharma Corporation, 632-1 Mifuku, Izunokuni, Shizuoka 410-2321, Japan
| | - Katsuhiro Kawaai
- Laboratory of Cell and Tissue Biology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo 160-8582, Japan
| | - Yukiko Kuroda
- Laboratory of Cell and Tissue Biology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo 160-8582, Japan
| | - Shinsuke Shibata
- Electron Microscope Laboratory, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo 160-8582, Japan
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22
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Segarra M, Aburto MR, Cop F, Llaó-Cid C, Härtl R, Damm M, Bethani I, Parrilla M, Husainie D, Schänzer A, Schlierbach H, Acker T, Mohr L, Torres-Masjoan L, Ritter M, Acker-Palmer A. Endothelial Dab1 signaling orchestrates neuro-glia-vessel communication in the central nervous system. Science 2018; 361:361/6404/eaao2861. [PMID: 30139844 DOI: 10.1126/science.aao2861] [Citation(s) in RCA: 88] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2017] [Accepted: 07/05/2018] [Indexed: 12/17/2022]
Abstract
The architecture of the neurovascular unit (NVU) is controlled by the communication of neurons, glia, and vascular cells. We found that the neuronal guidance cue reelin possesses proangiogenic activities that ensure the communication of endothelial cells (ECs) with the glia to control neuronal migration and the establishment of the blood-brain barrier in the mouse brain. Apolipoprotein E receptor 2 (ApoER2) and Disabled1 (Dab1) expressed in ECs are required for vascularization of the retina and the cerebral cortex. Deletion of Dab1 in ECs leads to a reduced secretion of laminin-α4 and decreased activation of integrin-β1 in glial cells, which in turn control neuronal migration and barrier properties of the NVU. Thus, reelin signaling in the endothelium is an instructive and integrative cue essential for neuro-glia-vascular communication.
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Affiliation(s)
- Marta Segarra
- Institute of Cell Biology and Neuroscience and Buchmann Institute for Molecular Life Sciences, University of Frankfurt, D-60438 Frankfurt am Main, Germany
| | - Maria R Aburto
- Institute of Cell Biology and Neuroscience and Buchmann Institute for Molecular Life Sciences, University of Frankfurt, D-60438 Frankfurt am Main, Germany.,Focus Program Translational Neurosciences, University of Mainz, D-55131 Mainz, Germany
| | - Florian Cop
- Institute of Cell Biology and Neuroscience and Buchmann Institute for Molecular Life Sciences, University of Frankfurt, D-60438 Frankfurt am Main, Germany
| | - Cecília Llaó-Cid
- Institute of Cell Biology and Neuroscience and Buchmann Institute for Molecular Life Sciences, University of Frankfurt, D-60438 Frankfurt am Main, Germany
| | - Ricarda Härtl
- Institute of Cell Biology and Neuroscience and Buchmann Institute for Molecular Life Sciences, University of Frankfurt, D-60438 Frankfurt am Main, Germany
| | - Miriam Damm
- Institute of Cell Biology and Neuroscience and Buchmann Institute for Molecular Life Sciences, University of Frankfurt, D-60438 Frankfurt am Main, Germany.,Focus Program Translational Neurosciences, University of Mainz, D-55131 Mainz, Germany
| | - Ioanna Bethani
- Institute of Cell Biology and Neuroscience and Buchmann Institute for Molecular Life Sciences, University of Frankfurt, D-60438 Frankfurt am Main, Germany
| | - Marta Parrilla
- Institute of Cell Biology and Neuroscience and Buchmann Institute for Molecular Life Sciences, University of Frankfurt, D-60438 Frankfurt am Main, Germany.,Max Planck Institute for Brain Research, D-60438 Frankfurt am Main, Germany
| | - Dewi Husainie
- Institute of Cell Biology and Neuroscience and Buchmann Institute for Molecular Life Sciences, University of Frankfurt, D-60438 Frankfurt am Main, Germany.,Max Planck Institute for Brain Research, D-60438 Frankfurt am Main, Germany
| | - Anne Schänzer
- Institute of Neuropathology, University of Giessen, D-35392 Giessen, Germany
| | - Hannah Schlierbach
- Institute of Neuropathology, University of Giessen, D-35392 Giessen, Germany
| | - Till Acker
- Institute of Neuropathology, University of Giessen, D-35392 Giessen, Germany
| | - Laura Mohr
- Institute of Cell Biology and Neuroscience and Buchmann Institute for Molecular Life Sciences, University of Frankfurt, D-60438 Frankfurt am Main, Germany
| | - Laia Torres-Masjoan
- Institute of Cell Biology and Neuroscience and Buchmann Institute for Molecular Life Sciences, University of Frankfurt, D-60438 Frankfurt am Main, Germany
| | - Mathias Ritter
- Institute of Cell Biology and Neuroscience and Buchmann Institute for Molecular Life Sciences, University of Frankfurt, D-60438 Frankfurt am Main, Germany
| | - Amparo Acker-Palmer
- Institute of Cell Biology and Neuroscience and Buchmann Institute for Molecular Life Sciences, University of Frankfurt, D-60438 Frankfurt am Main, Germany. .,Focus Program Translational Neurosciences, University of Mainz, D-55131 Mainz, Germany.,Max Planck Institute for Brain Research, D-60438 Frankfurt am Main, Germany
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23
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Adams KV, Morshead CM. Neural stem cell heterogeneity in the mammalian forebrain. Prog Neurobiol 2018; 170:2-36. [PMID: 29902499 DOI: 10.1016/j.pneurobio.2018.06.005] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2017] [Revised: 05/23/2018] [Accepted: 06/07/2018] [Indexed: 12/21/2022]
Abstract
The brain was long considered an organ that underwent very little change after development. It is now well established that the mammalian central nervous system contains neural stem cells that generate progeny that are capable of making new neurons, astrocytes, and oligodendrocytes throughout life. The field has advanced rapidly as it strives to understand the basic biology of these precursor cells, and explore their potential to promote brain repair. The purpose of this review is to present current knowledge about the diversity of neural stem cells in vitro and in vivo, and highlight distinctions between neural stem cell populations, throughout development, and within the niche. A comprehensive understanding of neural stem cell heterogeneity will provide insights into the cellular and molecular regulation of neural development and lifelong neurogenesis, and will guide the development of novel strategies to promote regeneration and neural repair.
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Affiliation(s)
- Kelsey V Adams
- Institute of Medical Science, Terrence Donnelly Centre, University of Toronto, Toronto ON, M5S 3E2, Canada.
| | - Cindi M Morshead
- Institute of Medical Science, Terrence Donnelly Centre, University of Toronto, Toronto ON, M5S 3E2, Canada; Department of Surgery, Division of Anatomy, Canada; Institute of Biomaterials and Biomedical Engineering, Canada; Rehabilitation Science Institute, University of Toronto, Canada.
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24
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Toutounchian JJ, McCarty JH. Selective expression of eGFP in mouse perivascular astrocytes by modification of the Mlc1 gene using T2A-based ribosome skipping. Genesis 2017; 55. [PMID: 28929580 DOI: 10.1002/dvg.23071] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2017] [Revised: 09/12/2017] [Accepted: 09/17/2017] [Indexed: 11/12/2022]
Abstract
Perivascular astrocyte end feet closely juxtapose cerebral blood vessels to regulate important developmental and physiological processes including endothelial cell proliferation and sprouting as well as the formation of the blood-brain barrier (BBB). The mechanisms underlying these events remain largely unknown due to a lack of experimental models for identifying perivascular astrocytes and distinguishing these cell types from other astroglial populations. Megalencephalic leukoencephalopathy with subcortical cysts 1 (Mlc1) is a transmembrane protein that is expressed in perivascular astrocyte end feet where it controls BBB development and homeostasis. On the basis of this knowledge, we used T2A peptide-skipping strategies to engineer a knock-in mouse model in which the endogenous Mlc1 gene drives expression of enhanced green fluorescent protein (eGFP), without impacting expression of Mlc1 protein. Analysis of fetal, neonatal and adult Mlc1-eGFP knock-in mice revealed a dynamic spatiotemporal expression pattern of eGFP in glial cells, including nestin-expressing neuroepithelial cells during development and glial fibrillary acidic protein (GFAP)-expressing perivascular astrocytes in the postnatal brain. EGFP was not expressed in neurons, microglia, oligodendroglia, or cerebral vascular cells. Analysis of angiogenesis in the neonatal retina also revealed enriched Mlc1-driven eGFP expression in perivascular astrocytes that contact sprouting blood vessels and regulate blood-retinal barrier permeability. A cortical injury model revealed that Mlc1-eGFP expression is progressively induced in reactive astrocytes that form a glial scar. Hence, Mlc1-eGFP knock-in mice are a new and powerful tool to identify perivascular astrocytes in the brain and retina and characterize how these cell types regulate cerebral blood vessel functions in health and disease.
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Affiliation(s)
- Jordan J Toutounchian
- Department of Neurosurgery, The University of Texas M. D. Anderson Cancer Center, Houston, Texas, 77030
| | - Joseph H McCarty
- Department of Neurosurgery, The University of Texas M. D. Anderson Cancer Center, Houston, Texas, 77030
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25
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Integrating the glioblastoma microenvironment into engineered experimental models. Future Sci OA 2017; 3:FSO189. [PMID: 28883992 PMCID: PMC5583655 DOI: 10.4155/fsoa-2016-0094] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2016] [Accepted: 02/22/2017] [Indexed: 12/13/2022] Open
Abstract
Glioblastoma (GBM) is the most lethal cancer originating in the brain. Its high mortality rate has been attributed to therapeutic resistance and rapid, diffuse invasion - both of which are strongly influenced by the unique microenvironment. Thus, there is a need to develop new models that mimic individual microenvironmental features and are able to provide clinically relevant data. Current understanding of the effects of the microenvironment on GBM progression, established experimental models of GBM and recent developments using bioengineered microenvironments as ex vivo experimental platforms that mimic the biochemical and physical properties of GBM tumors are discussed.
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26
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Geraldes R, Esiri MM, DeLuca GC, Palace J. Age-related small vessel disease: a potential contributor to neurodegeneration in multiple sclerosis. Brain Pathol 2017; 27:707-722. [PMID: 27864848 DOI: 10.1111/bpa.12460] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2016] [Accepted: 11/17/2016] [Indexed: 12/18/2022] Open
Abstract
Multiple sclerosis (MS) is a chronic inflammatory demyelinating disorder of the central nervous system wherein, after an initial phase of transient neurological defects, slow neurological deterioration due to progressive neuronal loss ensues. Age is a major determinant of MS progression onset and disability. Over the past years, several mechanisms have been proposed to explain the key drivers of neurodegeneration and disability accumulation in MS. However, the effect of commonly encountered age-related cerebral vessel disease, namely small vessel disease (SVD), has been largely neglected and constitutes the aim of this review. SVD shares some features with MS, that is, white matter demyelination and brain atrophy, and has been shown to contribute to the neuronal damage seen in vascular cognitive impairment. Several lines of evidence suggest that an interaction between MS and SVD may influence MS-related neurodegeneration. SVD may contribute to hypoperfusion, reduced vascular reactivity and tissue hypoxia, features seen in MS. Venule and endothelium abnormalities have been documented in MS but the role of arterioles and of other neurovascular unit structures, such as the pericyte, has not been explored. Vascular risk factors (VRF) have recently been associated with faster progression in MS, though the mechanisms are unclear since very few studies have addressed the impact of VRF and SVD on MS imaging and pathology outcomes. Therapeutic agents targeting the microvasculature and the neurovascular unit may impact both SVD and MS and may benefit patients with dual pathology.
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Affiliation(s)
- Ruth Geraldes
- Nuffield Department of Clinical Neurosciences, John Radcliffe Hospital, Oxford, UK
| | - Margaret M Esiri
- Nuffield Department of Clinical Neurosciences, John Radcliffe Hospital, Oxford, UK
| | - Gabriele C DeLuca
- Nuffield Department of Clinical Neurosciences, John Radcliffe Hospital, Oxford, UK
| | - Jacqueline Palace
- Nuffield Department of Clinical Neurosciences, John Radcliffe Hospital, Oxford, UK
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27
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Wesley UV, Hatcher JF, Ayvaci ER, Klemp A, Dempsey RJ. Regulation of Dipeptidyl Peptidase IV in the Post-stroke Rat Brain and In Vitro Ischemia: Implications for Chemokine-Mediated Neural Progenitor Cell Migration and Angiogenesis. Mol Neurobiol 2016; 54:4973-4985. [PMID: 27525674 DOI: 10.1007/s12035-016-0039-4] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2016] [Accepted: 08/05/2016] [Indexed: 12/13/2022]
Abstract
Cerebral ischemia evokes abnormal release of proteases in the brain microenvironment that spatiotemporally impact angio-neurogenesis. Dipeptidyl peptidase IV (DPPIV), a cell surface and secreted protease, has been implicated in extracellular matrix remodeling by regulating cell adhesion, migration, and angiogenesis through modifying the functions of the major chemokine stromal-derived factor, SDF1. To elucidate the possible association of DPPIV in ischemic brain, we examined the expression of DPPIV in the post-stroke rat brain and under in vitro ischemia by oxygen glucose deprivation (OGD). We further investigated the effects of DPPIV on SDF1 mediated in vitro chemotactic and angiogenic functions. DPPIV protein and mRNA levels were significantly upregulated during repair phase in the ischemic cortex of the rat brain, specifically in neurons, astrocytes, and endothelial cells. In vitro exposure of Neuro-2a neuronal cells and rat brain endothelial cells to OGD resulted in upregulation of DPPIV. In vitro functional analysis showed that DPPIV decreases the SDF1-mediated angiogenic potential of rat brain endothelial cells and inhibits the migration of Neuro-2a and neural progenitor cells. Western blot analyses revealed decreased levels of phosphorylated ERK1/2 and AKT in the presence of DPPIV. DPPIV inhibitor restored the effects of SDF1. Proteome profile array screening further revealed that DPPIV decreases matrix metalloproteinase-9, a key downstream effector of ERK-AKT signaling pathways. Overall, delayed induction of DPPIV in response to ischemia/reperfusion suggests that DPPIV may play an important role in endogenous brain tissue remodeling and repair processes. This may be mediated through modulation of SDF1-mediated cell migration and angiogenesis.
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Affiliation(s)
- Umadevi V Wesley
- Department of Neurological Surgery, University of Wisconsin, Clinical Science Center, 600 Highland Ave, Box 8660, Madison, WI, 53792, USA.
| | - James F Hatcher
- Department of Neurological Surgery, University of Wisconsin, Clinical Science Center, 600 Highland Ave, Box 8660, Madison, WI, 53792, USA
| | - Emine R Ayvaci
- Department of Neurological Surgery, University of Wisconsin, Clinical Science Center, 600 Highland Ave, Box 8660, Madison, WI, 53792, USA
| | - Abby Klemp
- Department of Neurological Surgery, University of Wisconsin, Clinical Science Center, 600 Highland Ave, Box 8660, Madison, WI, 53792, USA
| | - Robert J Dempsey
- Department of Neurological Surgery, University of Wisconsin, Clinical Science Center, 600 Highland Ave, Box 8660, Madison, WI, 53792, USA.
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