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Yang X, Liu S, Wang C, Fan H, Zou Q, Pu Y, Cai Z. Dietary salt promotes cognition impairment through GLP-1R/mTOR/p70S6K signaling pathway. Sci Rep 2024; 14:7970. [PMID: 38575652 PMCID: PMC10995169 DOI: 10.1038/s41598-024-57998-9] [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: 11/04/2023] [Accepted: 03/25/2024] [Indexed: 04/06/2024] Open
Abstract
Dietary salt has been associated with cognitive impairment in mice, possibly related to damaged synapses and tau hyperphosphorylation. However, the mechanism underlying how dietary salt causes cognitive dysfunction remains unclear. In our study, either a high-salt (8%) or normal diet (0.5%) was used to feed C57BL/6 mice for three months, and N2a cells were cultured in normal medium, NaCl medium (80 mM), or NaCl (80 mM) + Liraglutide (200 nM) medium for 48 h. Cognitive function in mice was assessed using the Morris water maze and shuttle box test, while anxiety was evaluated by the open field test (OPT). Western blotting (WB), immunofluorescence, and immunohistochemistry were utilized to assess the level of Glucagon-like Peptide-1 receptor (GLP-1R) and mTOR/p70S6K pathway. Electron microscope and western blotting were used to evaluate synapse function and tau phosphorylation. Our findings revealed that a high salt diet (HSD) reduced the level of synaptophysin (SYP) and postsynaptic density 95 (PSD95), resulting in significant synaptic damage. Additionally, hyperphosphorylation of tau at different sites was detected. The C57BL/6 mice showed significant impairment in learning and memory function compared to the control group, but HSD did not cause anxiety in the mice. In addition, the level of GLP-1R and autophagy flux decreased in the HSD group, while the level of mTOR/p70S6K was upregulated. Furthermore, liraglutide reversed the autophagy inhibition of N2a treated with NaCl. In summary, our study demonstrates that dietary salt inhibits the GLP-1R/mTOR/p70S6K pathway to inhibit autophagy and induces synaptic dysfunction and tau hyperphosphorylation, eventually impairing cognitive dysfunction.
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Affiliation(s)
- Xu Yang
- Department of Neurology, Affiliated Hospital of Southwest Medical University, Sichuan, 646000, People's Republic of China
- Department of Neurology, Chongqing General Hospital, Chongqing university, No. 118, Xingguang Avenue, Liangjiang New Area, Chongqing, 401147, People's Republic of China
- Chongqing Key Laboratory of Neurodegenerative Diseases, Chongqing No. 312, Zhongshan First Road, Yuzhong District, Chongqing, 400013, People's Republic of China
| | - Shu Liu
- Department of Neurology, Chongqing General Hospital, Chongqing university, No. 118, Xingguang Avenue, Liangjiang New Area, Chongqing, 401147, People's Republic of China
- Chongqing Key Laboratory of Neurodegenerative Diseases, Chongqing No. 312, Zhongshan First Road, Yuzhong District, Chongqing, 400013, People's Republic of China
| | - Chuanling Wang
- Department of Neurology, Chongqing General Hospital, Chongqing university, No. 118, Xingguang Avenue, Liangjiang New Area, Chongqing, 401147, People's Republic of China
- Chongqing Key Laboratory of Neurodegenerative Diseases, Chongqing No. 312, Zhongshan First Road, Yuzhong District, Chongqing, 400013, People's Republic of China
- Department of Pathophysiology, School of Basic Medicine, Chongqing Medical University, No. 1 Yixueyuan Road, Yuzhong District, Chongqing, 400016, People's Republic of China
| | - Haixia Fan
- Department of Neurology, Chongqing General Hospital, Chongqing university, No. 118, Xingguang Avenue, Liangjiang New Area, Chongqing, 401147, People's Republic of China
- Chongqing Key Laboratory of Neurodegenerative Diseases, Chongqing No. 312, Zhongshan First Road, Yuzhong District, Chongqing, 400013, People's Republic of China
| | - Qian Zou
- Department of Neurology, Chongqing General Hospital, Chongqing university, No. 118, Xingguang Avenue, Liangjiang New Area, Chongqing, 401147, People's Republic of China
- Chongqing Key Laboratory of Neurodegenerative Diseases, Chongqing No. 312, Zhongshan First Road, Yuzhong District, Chongqing, 400013, People's Republic of China
| | - Yingshuang Pu
- Department of Neurology, Chongqing General Hospital, Chongqing university, No. 118, Xingguang Avenue, Liangjiang New Area, Chongqing, 401147, People's Republic of China
- Chongqing Key Laboratory of Neurodegenerative Diseases, Chongqing No. 312, Zhongshan First Road, Yuzhong District, Chongqing, 400013, People's Republic of China
| | - Zhiyou Cai
- Department of Neurology, Affiliated Hospital of Southwest Medical University, Sichuan, 646000, People's Republic of China.
- Department of Neurology, Chongqing General Hospital, Chongqing university, No. 118, Xingguang Avenue, Liangjiang New Area, Chongqing, 401147, People's Republic of China.
- Chongqing Key Laboratory of Neurodegenerative Diseases, Chongqing No. 312, Zhongshan First Road, Yuzhong District, Chongqing, 400013, People's Republic of China.
- Department of Neurology, Chongqing General Hospital, No. 312 Zhongshan First Road, Yuzhong District, Chongqing, 400013, People's Republic of China.
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Javidi H, Ramazani Saadatabadi A, Sadrnezhaad SK, Najmoddin N. Conductive nerve conduit with piezoelectric properties for enhanced PC12 differentiation. Sci Rep 2023; 13:12004. [PMID: 37491480 PMCID: PMC10368663 DOI: 10.1038/s41598-023-38456-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2023] [Accepted: 07/08/2023] [Indexed: 07/27/2023] Open
Abstract
Restoration of nerve tissue remains highly challenging, mainly due to the limited regeneration capacity of the nervous system and the development of fibrosis. This limitation necessitates designing new nerve guidance channel to promote nerve repairing. In this study, we developed a novel core/shell conduit to induce PC12 differentiation. Co-electrospinning method was utilized to produce a fibrous shell containing polycaprolactone/polyvinylidene fluoride PCL/PVDF, gelatin and polyaniline/graphene (PAG) nanocomposite. The core section of the conduit was filled with chitosan-gelatin hydrogel containing PAG and ZnO nanoparticles. Such conduit shows antibacterial activity, electrical conductivity and piezoelectric property. The effect of such engineered conduit on PC12 differentiation was investigated by analyzing differentiation markers Nestin and microtubule-associated protein 2 (MAP2) through immunocytochemistry and PCR-RT techniques. The result revealed that such conduit could significantly induce Nestin and MAP2 gene expression in the PC12 cells and, thus, it is a viable option for effective cell differentiation and nerve regeneration.
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Affiliation(s)
- Hamideh Javidi
- Department of Biomedical Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran
| | | | - S K Sadrnezhaad
- Department of Materials Science and Engineering, Sharif University of Technology, Tehran, Iran
| | - Najmeh Najmoddin
- Department of Biomedical Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran.
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Griffin H, Sullivan SC, Barger SW, Phelan KD, Baldini G. Liraglutide Counteracts Endoplasmic Reticulum Stress in Palmitate-Treated Hypothalamic Neurons without Restoring Mitochondrial Homeostasis. Int J Mol Sci 2022; 24:ijms24010629. [PMID: 36614074 PMCID: PMC9820707 DOI: 10.3390/ijms24010629] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2022] [Revised: 12/19/2022] [Accepted: 12/24/2022] [Indexed: 12/31/2022] Open
Abstract
One feature of high-fat diet-induced neurodegeneration in the hypothalamus is an increased level of palmitate, which is associated with endoplasmic reticulum (ER) stress, loss of CoxIV, mitochondrial fragmentation, and decreased abundance of MC4R. To determine whether antidiabetic drugs protect against ER and/or mitochondrial dysfunction by lipid stress, hypothalamic neurons derived from pre-adult mice and neuronal Neuro2A cells were exposed to elevated palmitate. In the hypothalamic neurons, palmitate exposure increased expression of ER resident proteins, including that of SERCA2, indicating ER stress. Liraglutide reverted such altered ER proteostasis, while metformin only normalized SERCA2 expression. In Neuro2A cells liraglutide, but not metformin, also blunted dilation of the ER induced by palmitate treatment, and enhanced abundance and expression of MC4R at the cell surface. Thus, liraglutide counteracts, more effectively than metformin, altered ER proteostasis, morphology, and folding capacity in neurons exposed to fat. In palmitate-treated hypothalamic neurons, mitochondrial fragmentation took place together with loss of CoxIV and decreased mitochondrial membrane potential (MMP). Metformin, but not liraglutide, reverted mitochondrial fragmentation, and both liraglutide and metformin did not protect against either loss of CoxIV abundance or MMP. Thus, ER recovery from lipid stress can take place in hypothalamic neurons in the absence of recovered mitochondrial homeostasis.
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Affiliation(s)
- Haven Griffin
- Department of Biochemistry and Molecular Biology, University of Arkansas for Medical Sciences, Little Rock, AR 72205, USA
| | - Sarah C. Sullivan
- Department of Biochemistry and Molecular Biology, University of Arkansas for Medical Sciences, Little Rock, AR 72205, USA
| | - Steven W. Barger
- Department of Geriatrics, University of Arkansas for Medical Sciences, Little Rock, AR 72205, USA
| | - Kevin D. Phelan
- Department of Neurobiology and Developmental Sciences, University of Arkansas for Medical Sciences, Little Rock, AR 72205, USA
| | - Giulia Baldini
- Department of Biochemistry and Molecular Biology, University of Arkansas for Medical Sciences, Little Rock, AR 72205, USA
- Correspondence:
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Huang Q, Lian C, Dong Y, Zeng H, Liu B, Xu N, He Z, Guo H. SNAP25 Inhibits Glioma Progression by Regulating Synapse Plasticity via GLS-Mediated Glutaminolysis. Front Oncol 2021; 11:698835. [PMID: 34490096 PMCID: PMC8416623 DOI: 10.3389/fonc.2021.698835] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Accepted: 07/16/2021] [Indexed: 12/12/2022] Open
Abstract
Background Neuronal activity regulated by synaptic communication exerts an important role in tumorigenesis and progression in brain tumors. Genes for soluble N-ethylmaleimide-sensitive factor attachment protein receptors (SNAREs) annotated with the function ‘vesicle’ about synaptic connectivity were identified, and synaptosomal-associated protein 25 (SNAP25), one of those proteins, was found to have discrepant expression levels in neuropathies. However, the specific mechanism and prognostic value of SNAP25 during glioma progression remain unclear. Methods Using RNA sequencing data from The Cancer Genome Atlas (TCGA) database, the differential synaptosis-related genes between low grade glioma (LGG) and glioblastoma (GBM) were identified as highly correlated. Cox proportional hazards regression analysis and survival analysis were used to differentiate the outcome of low- and high-risk patients, and the Chinese Glioma Genome Atlas (CGGA) cohort was used for validation of the data set. RT-qPCR, western blot, and immunohistochemistry assays were performed to examine the expression level of SNAP25 in glioma cells and samples. Functional assays were performed to identify the effects of SNAP25 knockdown and overexpression on cell viability, migration, and invasion. Liquid chromatography-high resolution mass spectrometry (LC-MS)-based metabolomics approach was presented for identifying crucial metabolic disturbances in glioma cells. In situ mouse xenograft model was used to investigate the role of SNAP25 in vivo. Then, an immunofluorescence assay of the xenograft tissue was applied to evaluate the expression of the neuronal dendron formation marker-Microtubule Associated Protein 2 (MAP2). Results SNAP25 was decreased in level of expression in glioma tissues and cell lines, and low-level SNAP25 indicated an unfavorable prognosis of glioma patients. SNAP25 inhibited cell proliferation, migration, invasion and fostered glutamine metabolism of glioma cells, exerting a tumor suppressor role. Overexpressed SNAP25 exerted a lower expression level of MAP2, indicating poor neuronal plasticity and connectivity. SNAP25 could regulate glutaminase (GLS)-mediated glutaminolysis, and GLS knockdown could rescue the anti-tumor effect of SNAP25 in glioma cells. Moreover, upregulated SNAP25 also decreased tumor volume and prolonged the overall survival (OS) of the xenograft mouse. Conclusion SNAP25, a tumor suppressor inhibited carcinogenesis of glioma via limiting glutamate metabolism by regulating GLS expression, as well as inhibiting dendritic formation, which could be considered as a novel molecular therapeutic target for glioma.
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Affiliation(s)
- Qiongzhen Huang
- Guangdong Provincial Key Laboratory on Brain Function Repair and Regeneration, Zhujiang Hospital, Department of Neurosurgery, Guangzhou, China
| | - Changlin Lian
- Guangdong Provincial Key Laboratory on Brain Function Repair and Regeneration, Zhujiang Hospital, Department of Neurosurgery, Guangzhou, China
| | - Yaoyuan Dong
- Guangdong Provincial Key Laboratory on Brain Function Repair and Regeneration, Zhujiang Hospital, Department of Neurosurgery, Guangzhou, China
| | - Huijun Zeng
- Guangdong Provincial Key Laboratory on Brain Function Repair and Regeneration, Zhujiang Hospital, Department of Neurosurgery, Guangzhou, China
| | - Boyang Liu
- Guangdong Provincial Key Laboratory on Brain Function Repair and Regeneration, Zhujiang Hospital, Department of Neurosurgery, Guangzhou, China
| | - Ningbo Xu
- Guangdong Provincial Key Laboratory on Brain Function Repair and Regeneration, Zhujiang Hospital, Department of Neurosurgery, Guangzhou, China
| | - Zhenyan He
- Guangdong Provincial Key Laboratory on Brain Function Repair and Regeneration, Zhujiang Hospital, Department of Neurosurgery, Guangzhou, China
| | - Hongbo Guo
- Guangdong Provincial Key Laboratory on Brain Function Repair and Regeneration, Zhujiang Hospital, Department of Neurosurgery, Guangzhou, China
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The role of PGS/PCL scaffolds in promoting differentiation of human embryonic stem cells into retinal ganglion cells. Acta Biomater 2021; 126:238-248. [PMID: 33771718 DOI: 10.1016/j.actbio.2021.03.036] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2020] [Revised: 03/14/2021] [Accepted: 03/16/2021] [Indexed: 01/10/2023]
Abstract
The stem cell-based retinal ganglion cells (RGCs) replacement therapy offers a potential to restore vision in progressive optic neuropathies including glaucoma by replacing degenerated RGCs and by simulating axonal regeneration. Injured optic nerve axons do not regenerate owing to the limited intrinsic capacity of the neurons and the inhibitory environment at the injury site. Polymeric tissue scaffolds are able to modulate the physical environment while providing structural support for transplanted cells, however, their application specific to the RGC generation has been far from conclusive. The successful generation of clinically safe and functional RGCs that can appropriately integrate into the hosts' retinas still remain largely unresolved. Our study reports on a process that enables generation of RGCs from human embryonic stem cells (hESCs) that is simple, straightforward and repeatable and, investigates the influence of the aligned poly(glycerol sebacate) (PGS)/poly(ε-caprolactone) (PCL) scaffold on this differentiation process. Our findings demonstrate that PGS/PCL scaffold promotes differentiation of hESCs into RGC-like cells possibly by the simulation of cell active environmental signalling and, facilitates the growth of RGCs neurites along their lengths. STATEMENT OF SIGNIFICANCE: Glaucoma can lead to the degeneration of retinal ganglion cells (RGCs), with consequential vision loss. RGCs are incapable of self-renewal, replacement of diseased RGCs with healthy cells has been a goal to restore vision in glaucoma patients. In this regard, stem cell RGC replacement therapy has been shown to improve vision in animal models of glaucoma, which could be facilitated by using tissue-engineered polymeric scaffolds. In this study, we generated homogenous stem cell-derived RGCs via a straightforward differentiation protocol and evaluated the effects of PGS/PCL scaffold on RGCs differentiation and growth of RGCs neurites. Our study contributes to the knowledge on how biomaterial scaffolds are able to support the regeneration of RGC neurites (i.e., axons or dendrites) as a part of a possible future clinical therapy for the treatment of glaucoma.
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Sabogal-Guáqueta AM, Arias-Londoño JD, Gutierrez-Vargas J, Sepulveda-Falla D, Glatzel M, Villegas-Lanau A, Cardona-Gómez GP. Common disbalance in the brain parenchyma of dementias: Phospholipid profile analysis between CADASIL and sporadic Alzheimer's disease. Biochim Biophys Acta Mol Basis Dis 2020; 1866:165797. [PMID: 32302650 DOI: 10.1016/j.bbadis.2020.165797] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2019] [Revised: 04/06/2020] [Accepted: 04/07/2020] [Indexed: 10/25/2022]
Abstract
Sporadic Alzheimer's disease (SAD) is the most common form of dementia, and cerebral autosomal dominant arteriopathy with subcortical infarcts and leukoencephalopathy (CADASIL) is the most frequent hereditary ischemic small vessel disease of the brain. Relevant biomarkers or specific metabolic signatures could provide powerful tools to manage these diseases. Therefore, the main goal of this study was to compare the postmortem frontal cortex gray matter, white matter and cerebrospinal fluid (CSF) between a cognitively healthy group and CADASIL and SAD groups. We evaluated 352 individual lipids, belonging to 13 lipid classes/subclasses, using mass spectrometry, and the lipid profiles were subjected to multivariate analysis to discriminate between the dementia groups (CADASIL and SAD) and healthy controls. The main lipid molecular species showing greater discrimination by partial least squares-discriminant analysis (PLS-DA) and a higher significance multivariate correlation (sMC) index were as follows: phosphatidylserine (PS) PS(44:7) and lysophosphatidylethanolamine (LPE) LPE(18:2) in gray matter (GM); phosphatidylethanolamine (PE) PE(32:2) and phosphatidylcholine PC PC(44:6) in white matter (WM), and ether PE (ePE) ePE(38:2) and ether PC (ePC) ePC(34:3) in CSF. Common phospholipid molecular species were obtained in both dementias, such as PS(44:7) and lyso PC (LPC) LPC(22:5) in GM, PE(32:2) in WM and phosphatidic acid (PA) PA(38:5) and PC(42:7) in CFS. Our exploratory study suggests that phospholipids (PLs) involved in neurotransmission alteration, connectivity impairment and inflammation response in GM, WM and CSF are a transversal phenomenon affecting dementias such as CADASIL and SAD independent of the etiopathogenesis, thus providing a possible common prodromal phospholipidic biomarker of dementia.
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Affiliation(s)
- Angélica María Sabogal-Guáqueta
- Cellular and Molecular Neurobiology Area, Group of Neuroscience, SIU, Faculty of Medicine, University of Antioquia UdeA, Calle 70 No. 52 - 21, Medellín, Colombia
| | - Julián David Arias-Londoño
- Department of Systems Engineering, University of Antioquia UdeA, Calle 70 No. 52 - 21, Medellín, Colombia
| | | | - D Sepulveda-Falla
- Institute of Neuropathology, University Medical Center Hamburg-Eppendorf, Hamburg D-20246, Germany; Brain Biobank, Group of Neuroscience, SIU, Faculty of Medicine, University of Antioquia, Calle 70 No. 52 - 21, Medellín, Colombia
| | - M Glatzel
- Institute of Neuropathology, University Medical Center Hamburg-Eppendorf, Hamburg D-20246, Germany
| | - Andrés Villegas-Lanau
- Brain Biobank, Group of Neuroscience, SIU, Faculty of Medicine, University of Antioquia, Calle 70 No. 52 - 21, Medellín, Colombia
| | - Gloria Patricia Cardona-Gómez
- Cellular and Molecular Neurobiology Area, Group of Neuroscience, SIU, Faculty of Medicine, University of Antioquia UdeA, Calle 70 No. 52 - 21, Medellín, Colombia.
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Kruminis-Kaszkiel E, Osowski A, Bejer-Oleńska E, Dziekoński M, Wojtkiewicz J. Differentiation of Human Mesenchymal Stem Cells from Wharton's Jelly Towards Neural Stem Cells Using A Feasible and Repeatable Protocol. Cells 2020; 9:cells9030739. [PMID: 32192154 PMCID: PMC7140706 DOI: 10.3390/cells9030739] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2020] [Revised: 03/14/2020] [Accepted: 03/15/2020] [Indexed: 12/15/2022] Open
Abstract
The transplantation of neural stem cells (NSCs) capable of regenerating to the cells of the central nervous system (CNS) is a promising strategy in the treatment of CNS diseases and injury. As previous studies have highlighted mesenchymal stem cells (MSCs) as a source of NSCs, this study aimed to develop a feasible, efficient, and reproducible method for the neural induction of MSCs isolated from Wharton's jelly (hWJ-MSCs). We induced neural differentiation in a monolayer culture using epidermal growth factor, basic fibroblast growth factor, N2, and B27 supplements. This resulted in a homogenous population of proliferating cells that expressed certain neural markers at both the protein and mRNA levels. Flow cytometry and immunocytochemistry confirmed the expression of neural markers: nestin, sex-determining region Y (SRY) box 1 and 2 (SOX1 and SOX2), microtubule-associated protein 2 (MAP2), and glial fibrillary acidic protein (GFAP). The qRT-PCR analysis revealed significantly enhanced expression of nestin and MAP2 in differentiated cells. This study confirms that it is possible to generate NSCs-like cells from hWJ-MSCs in a 2D culture using a practical method. However, the therapeutic effectiveness of such differentiated cells should be extended to confirm the terminal differentiation ability and electrophysiological properties of neurons derived from them.
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Affiliation(s)
- Ewa Kruminis-Kaszkiel
- Department of Pathophysiology, School of Medicine, Collegium Medicum, University of Warmia and Mazury, 10-082 Olsztyn, Poland; (A.O.); (E.B.-O.); (J.W.)
- Correspondence:
| | - Adam Osowski
- Department of Pathophysiology, School of Medicine, Collegium Medicum, University of Warmia and Mazury, 10-082 Olsztyn, Poland; (A.O.); (E.B.-O.); (J.W.)
| | - Ewa Bejer-Oleńska
- Department of Pathophysiology, School of Medicine, Collegium Medicum, University of Warmia and Mazury, 10-082 Olsztyn, Poland; (A.O.); (E.B.-O.); (J.W.)
| | - Mariusz Dziekoński
- Department of Animal Anatomy and Physiology, Faculty of Biology and Biotechnology, University of Warmia and Mazury, 10-719 Olsztyn, Poland;
| | - Joanna Wojtkiewicz
- Department of Pathophysiology, School of Medicine, Collegium Medicum, University of Warmia and Mazury, 10-082 Olsztyn, Poland; (A.O.); (E.B.-O.); (J.W.)
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Esteva-Socias M, Artiga MJ, Bahamonde O, Belar O, Bermudo R, Castro E, Escámez T, Fraga M, Jauregui-Mosquera L, Novoa I, Peiró-Chova L, Rejón JD, Ruiz-Miró M, Vieiro-Balo P, Villar-Campo V, Zazo S, Rábano A, Villena C. In search of an evidence-based strategy for quality assessment of human tissue samples: report of the tissue Biospecimen Research Working Group of the Spanish Biobank Network. J Transl Med 2019; 17:370. [PMID: 31718661 PMCID: PMC6852937 DOI: 10.1186/s12967-019-2124-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2019] [Accepted: 11/01/2019] [Indexed: 01/10/2023] Open
Abstract
The purpose of the present work is to underline the importance of obtaining a standardized procedure to ensure and evaluate both clinical and research usability of human tissue samples. The study, which was carried out by the Biospecimen Science Working Group of the Spanish Biobank Network, is based on a general overview of the current situation about quality assurance in human tissue biospecimens. It was conducted an exhaustive review of the analytical techniques used to evaluate the quality of human tissue samples over the past 30 years, as well as their reference values if they were published, and classified them according to the biomolecules evaluated: (i) DNA, (ii) RNA, and (iii) soluble or/and fixed proteins for immunochemistry. More than 130 publications released between 1989 and 2019 were analysed, most of them reporting results focused on the analysis of tumour and biopsy samples. A quality assessment proposal with an algorithm has been developed for both frozen tissue samples and formalin-fixed paraffin-embedded (FFPE) samples, according to the expected quality of sample based on the available pre-analytical information and the experience of the participants in the Working Group. The high heterogeneity of human tissue samples and the wide number of pre-analytic factors associated to quality of samples makes it very difficult to harmonize the quality criteria. However, the proposed method to assess human tissue sample integrity and antigenicity will not only help to evaluate whether stored human tissue samples fit for the purpose of biomarker development, but will also allow to perform further studies, such as assessing the impact of different pre-analytical factors on very well characterized samples or evaluating the readjustment of tissue sample collection, processing and storing procedures. By ensuring the quality of the samples used on research, the reproducibility of scientific results will be guaranteed.
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Affiliation(s)
- Margalida Esteva-Socias
- Centro de Investigación Biomédica en Red Respiratory Diseases (CIBERES), Plataforma Biobanco Pulmonar CIBERES, Hospital Universitari Son Espases, Palma, Spain.,Grupo de Inflamación, reparación y cáncer en enfermedades respiratorias, Institut d'Investigació Sanitària de les Illes Balears (IdISBa), Hospital Universitari Son Espases, Palma, Spain
| | | | | | - Oihana Belar
- Basque Foundation for Health Innovation and Research, Basque Biobank, Barakaldo, Spain
| | - Raquel Bermudo
- Hospital Clínic-IDIBAPS Biobank, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Spain
| | - Erika Castro
- Basque Foundation for Health Innovation and Research, Basque Biobank, Barakaldo, Spain
| | - Teresa Escámez
- IMIB Biobank, Instituto Murciano de Investigación Biosanitaria, Murcia, Spain
| | - Máximo Fraga
- Depto. de Ciencias Forenses, Anatomía Patolóxica, Xinecología e Obstetricia, e Pediatría, Facultade de Medicina, Universidade de Santiago de Compostela (USC), Santiago, Spain.,Biobanco Complejo Hospitalario Universitario de Santiago de Compostela (CHUS), SERGAS, Santiago, Spain
| | | | - Isabel Novoa
- Vall d'Hebron University Hospital Biobank, Vall d'Hebron Hospital Research Institute, Barcelona, Spain
| | | | - Juan-David Rejón
- Biobanco del Sistema Sanitario Público de Andalucía, Granada, Spain
| | - María Ruiz-Miró
- IRBLleida Biobank, Instituto de Investigaciones Biomédica de Lleida-Fundación Dr. Pifarre, Lérida, Spain
| | - Paula Vieiro-Balo
- Biobanco Complejo Hospitalario Universitario de Santiago de Compostela (CHUS), SERGAS, Santiago, Spain
| | | | - Sandra Zazo
- Department of Pathology, IIS-Fundación Jiménez Díaz, Madrid, Spain
| | - Alberto Rábano
- Banco de Tejidos, Fundación CIEN, Instituto de Salud Carlos III, Madrid, Spain
| | - Cristina Villena
- Centro de Investigación Biomédica en Red Respiratory Diseases (CIBERES), Plataforma Biobanco Pulmonar CIBERES, Hospital Universitari Son Espases, Palma, Spain. .,Grupo de Inflamación, reparación y cáncer en enfermedades respiratorias, Institut d'Investigació Sanitària de les Illes Balears (IdISBa), Hospital Universitari Son Espases, Palma, Spain.
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MAP2 immunoreactivity deficit is conserved across the cerebral cortex within individuals with schizophrenia. NPJ SCHIZOPHRENIA 2019; 5:13. [PMID: 31462659 PMCID: PMC6713711 DOI: 10.1038/s41537-019-0081-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/02/2019] [Accepted: 07/29/2019] [Indexed: 12/22/2022]
Abstract
Several postmortem studies have reported lower levels of immunoreactivity (IR) for microtubule-associated protein 2 (MAP2) in several cortical regions of individuals with schizophrenia (SZ). However, whether this effect is conserved across multiple brain areas within an individual with SZ or if it is regionally-specific remains unclear. We characterized patterns of MAP2-IR across three cortical regions at different levels of the rostral-caudal axis within individual subjects with and without SZ. MAP2-IR levels were measured in deep layer 3 of dorsolateral prefrontal cortex (DLPFC), lateral intraparietal cortex (LIP), and primary visual cortex (V1). Postmortem tissue containing each cortical region was derived from 20 pairs of SZ subjects and nonpsychiatric comparison (NPC) subjects matched perfectly for sex, and as closely as possible for age and postmortem interval. MAP2-IR was assessed by quantitative fluorescence microscopy. We observed significantly lower levels of MAP2-IR in SZ subjects relative to NPC subjects, without a significant region by diagnosis interaction. Logs of the within-pair ratios (SZ:NPC) of MAP2-IR were significantly correlated across the three regions. These findings demonstrate that MAP2-IR deficits in SZ are consistent across three neocortical regions within individual subjects. This pattern of MAP2-IR deficit has implications for therapeutic development and future investigations of MAP2 pathology in SZ.
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Tang Z, Ma H, Mao Y, Ai S, Zhang P, Nie C, Gao Y, Lu R. Identification of stemness in primary retinoblastoma cells by analysis of stem-cell phenotypes and tumorigenicity with culture and xenograft models. Exp Cell Res 2019; 379:110-118. [DOI: 10.1016/j.yexcr.2019.03.034] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2019] [Revised: 03/14/2019] [Accepted: 03/27/2019] [Indexed: 10/27/2022]
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Yang C, Li X, Li Q, Li H, Qiao L, Guo Z, Lin J. Sonic Hedgehog Regulation of the Neural Precursor Cell Fate During Chicken Optic Tectum Development. J Mol Neurosci 2017; 64:287-299. [PMID: 29285739 DOI: 10.1007/s12031-017-1019-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2017] [Accepted: 12/15/2017] [Indexed: 12/11/2022]
Abstract
During nervous system development, neurons project axons over long distances to reach the appropriate targets for correct neural circuit formation. Sonic hedgehog (Shh) is a secreted protein and plays a key role in regulating vertebrate embryogenesis, especially in central nervous system (CNS) patterning, including neuronal migration and axonal projection in the brain and spinal cord. In the developing ventral midbrain, Shh is sufficient to specify a striped pattern of cell fates. Little is known about the molecular mechanisms underlying the Shh regulation of the neural precursor cell fate during the optic tectum development. Here, we aimed at studying how Shh might regulate chicken optic tectum patterning. In the present study, in ovo electroporation methods were employed to achieve the overexpression of Shh in the optic tectum during chicken embryo development. Besides, the study combined in ovo electroporation and neuron isolation culturing to study the function of Shh in vivo and in vitro. The fluorescent immunohistochemistry methods were used to check the related indicators. The results showed that Shh overexpression caused 87.8% of cells to be distributed to the stratum griseum central (SGC) layer, while only 39.3% of the GFP-transfected cells resided in the SGC layer in the control group. Shh overexpression also reduced the axon length in vivo and in vitro. In conclusion, we provide evidence that Shh regulates the neural precursor cell fate during chicken optic tectum development. Shh overexpression impairs neuronal migration and may affect the fate determination of transfected neurons.
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Affiliation(s)
- Ciqing Yang
- Stem Cells and Biotherapy Engineering Research Center of Henan, College of Life Science and Technology, Xinxiang Medical University, Xinxiang, 453003, China.,Henan Key Laboratory of Medical Tissue Regeneration, Xinxiang, 453003, China
| | - Xiaoying Li
- Stem Cells and Biotherapy Engineering Research Center of Henan, College of Life Science and Technology, Xinxiang Medical University, Xinxiang, 453003, China
| | - Qiuling Li
- Stem Cells and Biotherapy Engineering Research Center of Henan, College of Life Science and Technology, Xinxiang Medical University, Xinxiang, 453003, China
| | - Han Li
- Advanced Medical and Dental Institute, University Sains Malaysia, Bertam, 13200, Penang, Malaysia
| | - Liang Qiao
- Stem Cells and Biotherapy Engineering Research Center of Henan, College of Life Science and Technology, Xinxiang Medical University, Xinxiang, 453003, China.,Henan Key Laboratory of Medical Tissue Regeneration, Xinxiang, 453003, China
| | - Zhikun Guo
- Henan Key Laboratory of Medical Tissue Regeneration, Xinxiang, 453003, China
| | - Juntang Lin
- Stem Cells and Biotherapy Engineering Research Center of Henan, College of Life Science and Technology, Xinxiang Medical University, Xinxiang, 453003, China. .,Henan Key Laboratory of Medical Tissue Regeneration, Xinxiang, 453003, China. .,College of Biomedical Engineering, Xinxiang Medical University, Xinxiang, 453003, China.
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