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Shen T, Shi J, Zhao X, Fu L, Wang N, Zheng X, Chen Y, Li M, Ma C, Liu P, Zhu D. Presenilin 1 Is a Therapeutic Target in Pulmonary Hypertension and Promotes Vascular Remodeling. Am J Respir Cell Mol Biol 2024; 70:468-481. [PMID: 38381098 DOI: 10.1165/rcmb.2022-0426oc] [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: 11/02/2022] [Accepted: 02/20/2024] [Indexed: 02/22/2024] Open
Abstract
Small muscular pulmonary artery remodeling is a dominant feature of pulmonary arterial hypertension (PAH). PSEN1 affects angiogenesis, cancer, and Alzheimer's disease. We aimed to determine the role of PSEN1 in the pathogenesis of vascular remodeling in pulmonary hypertension (PH). Hemodynamics and vascular remodeling in the Psen1-knockin and smooth muscle-specific Psen1-knockout mice were assessed. The functional partners of PSEN1 were predicted by bioinformatics analysis and biochemical experiments. The therapeutic effect of PH was evaluated by administration of the PSEN1-specific inhibitor ELN318463. We discovered that both the mRNA and protein levels of PSEN1 were increased over time in hypoxic rats, monocrotaline rats, and Su5416/hypoxia mice. Psen1 transgenic mice were highly susceptible to PH, whereas smooth muscle-specific Psen1-knockout mice were resistant to hypoxic PH. STRING analysis showed that Notch1/2/3, β-catenin, Cadherin-1, DNER (delta/notch-like epidermal growth factor-related receptor), TMP10, and ERBB4 appeared to be highly correlated with PSEN1. Immunoprecipitation confirmed that PSEN1 interacts with β-catenin and DNER, and these interactions were suppressed by the catalytic PSEN1 mutations D257A, D385A, and C410Y. PSEN1 was found to mediate the nuclear translocation of the Notch1 intracellular domains and activated RBP-Jκ. Octaarginine-coated liposome-mediated pharmacological inhibition of PSEN1 significantly prevented and reversed the pathological process in hypoxic and monocrotaline-induced PH. PSEN1 essentially drives the pathogenesis of PAH and interacted with the noncanonical Notch ligand DNER. PSEN1 can be used as a promising molecular target for treating PAH. PSEN1 inhibitor ELN318463 can prevent and reverse the progression of PH and can be developed as a potential anti-PAH drug.
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Affiliation(s)
- TingTing Shen
- Institute of Cancer Stem Cell, Dalian Medical University, Dalian, China
- Central Laboratory of Harbin Medical University-Daqing, College of Medical Laboratory Science and Technology, Harbin Medical University (Daqing), Daqing, China; and
| | - JiuCheng Shi
- Central Laboratory of Harbin Medical University-Daqing, College of Medical Laboratory Science and Technology, Harbin Medical University (Daqing), Daqing, China; and
| | - XiJuan Zhao
- Central Laboratory of Harbin Medical University-Daqing, College of Medical Laboratory Science and Technology, Harbin Medical University (Daqing), Daqing, China; and
| | - Li Fu
- Central Laboratory of Harbin Medical University-Daqing, College of Medical Laboratory Science and Technology, Harbin Medical University (Daqing), Daqing, China; and
| | - Na Wang
- Central Laboratory of Harbin Medical University-Daqing, College of Medical Laboratory Science and Technology, Harbin Medical University (Daqing), Daqing, China; and
| | - XiaoDong Zheng
- Central Laboratory of Harbin Medical University-Daqing, College of Medical Laboratory Science and Technology, Harbin Medical University (Daqing), Daqing, China; and
| | - YingLi Chen
- Central Laboratory of Harbin Medical University-Daqing, College of Medical Laboratory Science and Technology, Harbin Medical University (Daqing), Daqing, China; and
| | - MingHui Li
- Central Laboratory of Harbin Medical University-Daqing, College of Medical Laboratory Science and Technology, Harbin Medical University (Daqing), Daqing, China; and
| | - Cui Ma
- Central Laboratory of Harbin Medical University-Daqing, College of Medical Laboratory Science and Technology, Harbin Medical University (Daqing), Daqing, China; and
| | - PiXu Liu
- Institute of Cancer Stem Cell, Dalian Medical University, Dalian, China
| | - DaLing Zhu
- Central Laboratory of Harbin Medical University-Daqing, College of Medical Laboratory Science and Technology, Harbin Medical University (Daqing), Daqing, China; and
- College of Pharmacy, Harbin Medical University, Harbin, China
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2
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Moussavi Nik SH, Porter T, Newman M, Bartlett B, Khan I, Sabale M, Eccles M, Woodfield A, Groth D, Dore V, Villemagne VL, Masters CL, Martins RN, Laws SM, Lardelli M, Verdile G. Relevance of a Truncated PRESENILIN 2 Transcript to Alzheimer's Disease and Neurodegeneration. J Alzheimers Dis 2021; 80:1479-1489. [PMID: 33720885 DOI: 10.3233/jad-201133] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
BACKGROUND The PRESENILIN genes (PSEN1, PSEN2) encoding for their respective proteins have critical roles in many aspects of Alzheimer's disease (AD) pathogenesis. The PS2V transcript of PSEN2 encodes a truncated protein and is upregulated in AD brains; however, its relevance to AD and disease progression remains to be determined. OBJECTIVE Assess transcript levels in postmortem AD and non-AD brain tissue and in lymphocytes collected under the Australian Imaging Biomarker and Lifestyle (AIBL) study. METHODS Full length PSEN2 and PS2V transcript levels were assessed by quantitative digital PCR in postmortem brain tissue (frontal cortex and hippocampus) from control, AD, frontotemporal dementia (FTD), and Lewy body dementia (LBD). Transcript levels were also assessed in lymphocytes obtained from the Perth subset of the AIBL study (n = 160). Linear regression analysis was used to assess correlations between transcript copy number and brain volume and neocortical amyloid load. RESULTS PS2V levels increased in AD postmortem brain but PS2V was also present at significant levels in FTD and LBD brains. PS2V transcript was detected in lymphocytes and PS2V/PSEN2 ratios were increased in mild cognitive impairment (p = 0.024) and AD (p = 0.019) groups compared to control group. Increased ratios were significantly correlated with hippocampal volumes only (n = 62, β= -0.269, p = 0.03). CONCLUSION Taken together, these results suggest that PS2V may be a marker of overall neurodegeneration.
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Affiliation(s)
- Seyyed Hani Moussavi Nik
- University of Adelaide, School of Biological Sciences, Centre for Molecular Pathology, Adelaide, SA, Australia
| | - Tenielle Porter
- Collaborative Genomics and Translation Group, Strategic Research Centre for Precision Health, School of Medical and Health Sciences, Edith Cowan University, Joondalup, Western Australia, Australia.,School of Pharmacy and Biomedical Sciences, Faculty of Health Sciences, Curtin Health Innovation Research Institute, Curtin University, Bentley, Western Australia, Australia
| | - Morgan Newman
- University of Adelaide, School of Biological Sciences, Centre for Molecular Pathology, Adelaide, SA, Australia
| | - Benjamin Bartlett
- School of Pharmacy and Biomedical Sciences, Faculty of Health Sciences, Curtin Health Innovation Research Institute, Curtin University, Bentley, Western Australia, Australia.,Department of Advanced Clinical and Translational Cardiovascular Imaging, Harry Perkins Institute of Medical Research, Murdoch, Western Australia, Australia.,School of Medicine, University of Western Australia, Crawley, Western Australia, Australia
| | - Imran Khan
- School of Pharmacy and Biomedical Sciences, Faculty of Health Sciences, Curtin Health Innovation Research Institute, Curtin University, Bentley, Western Australia, Australia
| | - Miheer Sabale
- School of Pharmacy and Biomedical Sciences, Faculty of Health Sciences, Curtin Health Innovation Research Institute, Curtin University, Bentley, Western Australia, Australia.,Biomedical Sciences, Faculty of Medicine and Health Sciences, Macquarie University, New South Wales, Australia
| | - Melissa Eccles
- School of Pharmacy and Biomedical Sciences, Faculty of Health Sciences, Curtin Health Innovation Research Institute, Curtin University, Bentley, Western Australia, Australia
| | - Amy Woodfield
- School of Pharmacy and Biomedical Sciences, Faculty of Health Sciences, Curtin Health Innovation Research Institute, Curtin University, Bentley, Western Australia, Australia
| | - David Groth
- School of Pharmacy and Biomedical Sciences, Faculty of Health Sciences, Curtin Health Innovation Research Institute, Curtin University, Bentley, Western Australia, Australia
| | - Vincent Dore
- Department of Nuclear Medicine and Centre for PET, Austin Health, Heidelberg, VIC, Australia
| | - Victor L Villemagne
- Department of Nuclear Medicine and Centre for PET, Austin Health, Heidelberg, VIC, Australia.,The Florey Institute of Neuroscience and Mental Health, The University of Melbourne, Parkville, Victoria, Australia
| | - Colin L Masters
- The Florey Institute of Neuroscience and Mental Health, The University of Melbourne, Parkville, Victoria, Australia
| | - Ralph N Martins
- Biomedical Sciences, Faculty of Medicine and Health Sciences, Macquarie University, New South Wales, Australia.,School of Medical and Health Sciences, Edith Cowan University, Western Australia, Australia
| | - Simon M Laws
- Collaborative Genomics and Translation Group, Strategic Research Centre for Precision Health, School of Medical and Health Sciences, Edith Cowan University, Joondalup, Western Australia, Australia.,School of Pharmacy and Biomedical Sciences, Faculty of Health Sciences, Curtin Health Innovation Research Institute, Curtin University, Bentley, Western Australia, Australia
| | - Michael Lardelli
- University of Adelaide, School of Biological Sciences, Centre for Molecular Pathology, Adelaide, SA, Australia
| | - Giuseppe Verdile
- Collaborative Genomics and Translation Group, Strategic Research Centre for Precision Health, School of Medical and Health Sciences, Edith Cowan University, Joondalup, Western Australia, Australia.,School of Pharmacy and Biomedical Sciences, Faculty of Health Sciences, Curtin Health Innovation Research Institute, Curtin University, Bentley, Western Australia, Australia
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3
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Jiang H, Pederson SM, Newman M, Dong Y, Barthelson K, Lardelli M. Transcriptome analysis indicates dominant effects on ribosome and mitochondrial function of a premature termination codon mutation in the zebrafish gene psen2. PLoS One 2020; 15:e0232559. [PMID: 32658922 PMCID: PMC7357760 DOI: 10.1371/journal.pone.0232559] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2020] [Accepted: 06/25/2020] [Indexed: 01/16/2023] Open
Abstract
PRESENILIN 2 (PSEN2) is one of the genes mutated in early onset familial Alzheimer’s disease (EOfAD). PSEN2 shares significant amino acid sequence identity with another EOfAD-related gene PRESENILIN 1 (PSEN1), and partial functional redundancy is seen between these two genes. However, the complete range of functions of PSEN1 and PSEN2 is not yet understood. In this study, we performed targeted mutagenesis of the zebrafish psen2 gene to generate a premature termination codon close downstream of the translation start with the intention of creating a null mutation. Homozygotes for this mutation, psen2S4Ter, are viable and fertile, and adults do not show any gross psen2-dependent pigmentation defects, arguing against significant loss of γ-secretase activity. Also, assessment of the numbers of Dorsal Longitudinal Ascending (DoLA) interneurons that are responsive to psen2 but not psen1 activity during embryogenesis did not reveal decreased psen2 function. Transcripts containing the S4Ter mutation show no evidence of destabilization by nonsense-mediated decay. Forced expression in zebrafish embryos of fusions of psen2S4Ter 5’ mRNA sequences with sequence encoding enhanced green fluorescent protein (EGFP) indicated that the psen2S4Ter mutation permits utilization of cryptic, novel downstream translation start codons. These likely initiate translation of N-terminally truncated Psen2 proteins lacking late endosomal/lysosomal localization sequences and that obey the “reading frame preservation rule” of PRESENILIN EOfAD mutations. Transcriptome analysis of entire brains from a 6-month-old family of wild type, heterozygous and homozygous psen2S4Ter female siblings revealed profoundly dominant effects on gene expression likely indicating changes in ribosomal, mitochondrial, and anion transport functions.
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Affiliation(s)
- Haowei Jiang
- Alzheimer’s Disease Genetics Laboratory, School of Biological Sciences, University of Adelaide, Adelaide, SA, Australia
| | - Stephen Martin Pederson
- Bioinformatics Hub, School of Biological Sciences, University of Adelaide, Adelaide, SA, Australia
| | - Morgan Newman
- Alzheimer’s Disease Genetics Laboratory, School of Biological Sciences, University of Adelaide, Adelaide, SA, Australia
| | - Yang Dong
- Alzheimer’s Disease Genetics Laboratory, School of Biological Sciences, University of Adelaide, Adelaide, SA, Australia
| | - Karissa Barthelson
- Alzheimer’s Disease Genetics Laboratory, School of Biological Sciences, University of Adelaide, Adelaide, SA, Australia
| | - Michael Lardelli
- Alzheimer’s Disease Genetics Laboratory, School of Biological Sciences, University of Adelaide, Adelaide, SA, Australia
- * E-mail:
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Song XW, Yuan QN, Tang Y, Cao M, Shen YF, Zeng ZY, Lei CH, Li S, Zhao XX, Yang YJ. Conditionally targeted deletion of PSEN1 leads to diastolic heart dysfunction. J Cell Physiol 2017; 233:1548-1557. [PMID: 28617969 DOI: 10.1002/jcp.26057] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2017] [Accepted: 06/14/2017] [Indexed: 11/07/2022]
Abstract
Recently, PSEN1 has been reported to have mutations in dilated cardiomyopathy pedigrees. However, the function and mechanism of PSEN1 in cardiomyopathy remains unresolved. Here, we established four types of genetically modified mice to determine the function of PSEN1 in cardiac development and pathology. PSEN1 null mutation resulted in perinatal death, retardation of heart growth, ventricular dilatation, septum defects, and valvular thickening. PSEN1 knockout in adults led to decreased muscle fibers, widened sarcomere Z lines and reduced lengths of sarcomeres in cardiomyocytes. Cardiovascular loss of function of PSEN1 induced by Sm22a-Cre or Myh6-Cre/ER/tamoxifen also resulted in severe ultrastructural abnormalities, such as relaxed gap junctions between neighboring cardiomyocytes. Functionally, cardiovascular deletion of PSEN1 caused spontaneous mortality from birth to adulthood and led to diastolic heart dysfunction, including decreased volume of the left ventricle at the end-systolic and end-diastolic stages. Additionally, in a myocardial ischemia model, deletion of PSEN1 in the cardiovascular system first protected mice by inducing adaptive hypertrophy but ultimately resulted in severe heart failure. Furthermore, a collection of genes was abnormally expressed in the hearts of cardiac-specific PSEN1 knockout mice. They were enriched in cell proliferation, calcium regulation, and so on. Taken together, dynamic regulation and abnormal function of PSEN1 underlie the pathogenesis of cardiovascular diseases due to ultrastructural abnormality of cardiomyocytes.
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MESH Headings
- Animals
- Diastole
- Gene Deletion
- Gene Expression Regulation
- Genetic Predisposition to Disease
- Heart Defects, Congenital/genetics
- Heart Defects, Congenital/metabolism
- Heart Defects, Congenital/pathology
- Heart Defects, Congenital/physiopathology
- Hypertrophy, Left Ventricular/genetics
- Hypertrophy, Left Ventricular/metabolism
- Hypertrophy, Left Ventricular/pathology
- Hypertrophy, Left Ventricular/physiopathology
- Mice, Knockout
- Myocardial Ischemia/genetics
- Myocardial Ischemia/metabolism
- Myocardial Ischemia/pathology
- Myocardial Ischemia/physiopathology
- Myocytes, Cardiac/metabolism
- Myocytes, Cardiac/ultrastructure
- Phenotype
- Presenilin-1/deficiency
- Presenilin-1/genetics
- Ventricular Dysfunction, Left/genetics
- Ventricular Dysfunction, Left/metabolism
- Ventricular Dysfunction, Left/pathology
- Ventricular Dysfunction, Left/physiopathology
- Ventricular Function, Left
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Affiliation(s)
- Xiao-Wei Song
- Department of Biophysics, Second Military Medical University, Shanghai, China
- Department of Cardiology, Changhai Hospital, Shanghai, China
| | - Qing-Ning Yuan
- Department of Biophysics, Second Military Medical University, Shanghai, China
| | - Ying Tang
- Department of Biophysics, Second Military Medical University, Shanghai, China
| | - Mi Cao
- Department of Biophysics, Second Military Medical University, Shanghai, China
| | - Ya-Feng Shen
- Department of Biophysics, Second Military Medical University, Shanghai, China
| | - Zhen-Yu Zeng
- Department of Cardiology, Changhai Hospital, Shanghai, China
| | - Chang-Hai Lei
- Department of Biophysics, Second Military Medical University, Shanghai, China
| | - SongHua Li
- Department of Cardiology, Changhai Hospital, Shanghai, China
| | - Xian-Xian Zhao
- Department of Cardiology, Changhai Hospital, Shanghai, China
| | - Yong-Ji Yang
- Department of Biophysics, Second Military Medical University, Shanghai, China
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5
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Alzheimer-associated presenilin 2 gene is dysregulated in rat medial temporal lobe cortex after complete brain ischemia due to cardiac arrest. Pharmacol Rep 2015; 68:155-61. [PMID: 26721367 DOI: 10.1016/j.pharep.2015.08.002] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2015] [Revised: 07/21/2015] [Accepted: 08/03/2015] [Indexed: 10/23/2022]
Abstract
BACKGROUND Brain ischemia may be causally related with Alzheimer's disease. Probably, presenilin gene dysregulation may be associated with Alzheimer's disease neuropathology. Consequently, we have examined quantitative changes in both presenilin 1 and 2 genes in the medial temporal lobe cortex following 10-min global brain ischemia in rats. METHODS Global brain ischemia was induced by cardiac arrest in female rats that were allowed to survive for 2, 7 and 30 days. The expression of presenilin genes was evaluated in the rat medial temporal lobe cortex with the use of quantitative RT-PCR analysis. RESULTS Presenilin 1 gene expression tended to be downregulated from days 2 to 7 postischemia but at day 30, there was a reverse tendency. The greatest overexpression of presenilin 2 gene was noted at 2-nd day whilst on day 7, the expression of this gene was only modestly elevated. Eventually, at day 30 expression of presenilin 2 gene was modestly downregulated. Alterations of presenilin 2 gene expression between 2 and 7 days and between 2 and 30 days were statistically significant. CONCLUSIONS Thus, presented changes suggest that the significant dysregulation of presenilin 2 gene may be connected with a response of neuronal cells to transient global brain ischemia due to cardiac arrest. Finally, the ischemia-induced gene dysregulation may play a key role in the late onset of Alzheimer's-type dementia.
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6
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Chen Y, Li H, Zhou B, Peng Y, Zheng Q, Rao L. Presenilin-1 polymorphisms are not relevant in susceptibility to ventricular septal defect: a case-control study. DNA Cell Biol 2011; 30:565-8. [PMID: 21323574 DOI: 10.1089/dna.2010.1148] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
Although many studies have demonstrated that presenilin-1 plays a vital role in cardiovascular system development, no data are available concerning association of polymorphisms of presenilin-1 with ventricular septal defect (VSD) in the Chinese population. The aim of this study was to evaluate the association between two single-nucleotide polymorphisms (rs1800844 and rs177415) of presenilin-1 and VSD. A total of 151 isolated VSD patients and 296 controls were included in the study. The genotype of the polymorphisms was determined by polymerase chain reaction-restriction fragment length polymorphism. Our study showed no statistically significant differences in genotype and allele frequencies between VSD and controls with any of the presenilin-1 genetic variants. These data may provide evidence that the presenilin-1 gene is not a genetic marker for VSD susceptibility in the Han Chinese population.
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Affiliation(s)
- Yu Chen
- Department of Cardiology, West China Hospital of Sichuan University, Chengdu, PR China
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7
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Crestini A, Piscopo P, Iazeolla M, Albani D, Rivabene R, Forloni G, Confaloni A. Rosuvastatin and Thapsigargin Modulate γ-Secretase Gene Expression and APP Processing in a Human Neuroglioma Model. J Mol Neurosci 2010; 43:461-9. [DOI: 10.1007/s12031-010-9465-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2010] [Accepted: 10/08/2010] [Indexed: 01/06/2023]
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De Gasperi R, Sosa MAG, Dracheva S, Elder GA. Presenilin-1 regulates induction of hypoxia inducible factor-1α: altered activation by a mutation associated with familial Alzheimer's disease. Mol Neurodegener 2010; 5:38. [PMID: 20863403 PMCID: PMC2955646 DOI: 10.1186/1750-1326-5-38] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2010] [Accepted: 09/23/2010] [Indexed: 12/23/2022] Open
Abstract
Background Mutations in presenilin-1 (Psen1) cause familial Alzheimer's disease (FAD). Both hypoxia and ischemia have been implicated in the pathological cascade that leads to amyloid deposition in AD. Here we investigated whether Psen1 might regulate hypoxic responses by modulating induction of the transcription factor hypoxia inducible factor 1-α (HIF-1α). Results In fibroblasts that lack Psen1 induction of HIF-1α was impaired in response to the hypoxia mimetic cobalt chloride, as well as was induction by insulin and calcium chelation. Reintroduction of human Psen1 using a lentiviral vector partially rescued the responsiveness of Psen1-/- fibroblasts to cobalt chloride induction. HIF-1α induction did not require Psen1's associated γ-secretase activity. In addition, the failure of insulin to induce HIF-1α was not explicable on the basis of failed activation of the phosphatidylinositol 3-kinase (PI3K/Akt) pathway which activated normally in Psen1-/- fibroblasts. Rather we found that basal levels of HIF-1α were lower in Psen1-/- fibroblasts and that the basis for lower constitutive levels of HIF-1α was best explained by accelerated HIF-1α degradation. We further found that Psen1 and HIF-1α physically interact suggesting that Psen1 may protect HIF-1α from degradation through the proteasome. In fibroblasts harboring the M146V Psen1 FAD mutation on a mouse Psen1 null background, metabolic induction of HIF-1α by insulin was impaired but not hypoxic induction by cobalt chloride. Unlike Psen1-/- fibroblasts, basal levels of HIF-1α were normal in FAD mutant fibroblasts but activation of the insulin-receptor pathway was impaired. Interestingly, in Psen1-/- primary neuronal cultures HIF-1α was induced normally in response to cobalt chloride but insulin induction of HIF-1α was impaired even though activation of the PI3K/Akt pathway by insulin proceeded normally in Psen1-/- neuronal cultures. Basal levels of HIF-1α were not significantly different in Psen1-/- neurons and HIF-1α levels were normal in Psen1-/- embryos. Conclusions Collectively these studies show that Psen1 regulates induction of HIF-1α although they indicate that cell type specific differences exist in the effect of Psen1 on induction. They also show that the M146V Psen1 FAD mutation impairs metabolic induction of HIF-1α, an observation that may have pathophysiological significance for AD.
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Affiliation(s)
- Rita De Gasperi
- Neurology Service, James J Peters Department of Veterans Affairs Medical Center, Bronx, NY 10468, USA.
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Control of intracellular calcium signaling as a neuroprotective strategy. Molecules 2010; 15:1168-95. [PMID: 20335972 PMCID: PMC2847496 DOI: 10.3390/molecules15031168] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2009] [Revised: 02/05/2010] [Accepted: 03/02/2010] [Indexed: 12/13/2022] Open
Abstract
Both acute and chronic degenerative diseases of the nervous system reduce the viability and function of neurons through changes in intracellular calcium signaling. In particular, pathological increases in the intracellular calcium concentration promote such pathogenesis. Disease involvement of numerous regulators of intracellular calcium signaling located on the plasma membrane and intracellular organelles has been documented. Diverse groups of chemical compounds targeting ion channels, G-protein coupled receptors, pumps and enzymes have been identified as potential neuroprotectants. The present review summarizes the discovery, mechanisms and biological activity of neuroprotective molecules targeting proteins that control intracellular calcium signaling to preserve or restore structure and function of the nervous system. Disease relevance, clinical applications and new technologies for the identification of such molecules are being discussed.
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Kim MY, Seo EJ, Lee DH, Kim EJ, Kim HS, Cho HY, Chung EY, Lee SH, Baik EJ, Moon CH, Jung YS. Gadd45 is a novel mediator of cardiomyocyte apoptosis induced by ischaemia/hypoxia. Cardiovasc Res 2010; 87:119-26. [DOI: 10.1093/cvr/cvq048] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
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11
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Dror V, Kalynyak TB, Bychkivska Y, Frey MHZ, Tee M, Jeffrey KD, Nguyen V, Luciani DS, Johnson JD. Glucose and endoplasmic reticulum calcium channels regulate HIF-1beta via presenilin in pancreatic beta-cells. J Biol Chem 2008; 283:9909-16. [PMID: 18174159 DOI: 10.1074/jbc.m710601200] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
Pancreatic beta-cell death is a critical event in type 1 diabetes, type 2 diabetes, and clinical islet transplantation. We have previously shown that prolonged block of ryanodine receptor (RyR)-gated release from intracellular Ca(2+) stores activates calpain-10-dependent apoptosis in beta-cells. In the present study, we further characterized intracellular Ca(2+) channel expression and function in human islets and the MIN6 beta-cell line. All three RyR isoforms were identified in human islets and MIN6 cells, and these endoplasmic reticulum channels were observed in close proximity to mitochondria. Blocking RyR channels, but not sarco/endoplasmic reticulum ATPase (SERCA) pumps, reduced the ATP/ADP ratio. Blocking Ca(2+) flux through RyR or inositol trisphosphate receptor channels, but not SERCA pumps, increased the expression of hypoxia-inducible factor (HIF-1beta). Moreover, inhibition of RyR or inositol trisphosphate receptor channels, but not SERCA pumps, increased the expression of presenilin-1. Both HIF-1beta and presenilin-1 expression were also induced by low glucose. Overexpression of presenilin-1 increased HIF-1beta, suggesting that HIF is downstream of presenilin. Our results provide the first evidence of a presenilin-HIF signaling network in beta-cells. We demonstrate that this pathway is controlled by Ca(2+) flux through intracellular channels, likely via changes in mitochondrial metabolism and ATP. These findings provide a mechanistic understanding of the signaling pathways activated when intracellular Ca(2+) homeostasis and metabolic activity are suppressed in diabetes and islet transplantation.
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Affiliation(s)
- Vardit Dror
- Laboratory of Molecular Signaling in Diabetes, Diabetes Research Group, Department of Cellular and Physiological Sciences, University of British Columbia, Vancouver, BC, Canada
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12
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Smith MJ, Sharples RA, Evin G, McLean CA, Dean B, Pavey G, Fantino E, Cotton RGH, Imaizumi K, Masters CL, Cappai R, Culvenor JG. Expression of truncated presenilin 2 splice variant in Alzheimer's disease, bipolar disorder, and schizophrenia brain cortex. ACTA ACUST UNITED AC 2004; 127:128-35. [PMID: 15306129 DOI: 10.1016/j.molbrainres.2004.05.019] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/30/2004] [Indexed: 11/19/2022]
Abstract
We have analysed the expression of a truncated variant presenilin 2 protein (PS2V) in frontal cortex from subjects with Alzheimer's disease (AD) and age-matched controls, and compared these results with cortex from bipolar disorder (BP), schizophrenia (SZ) and controls in a second brain bank collection. PS2V protein was detected as a 14 kDa species with antibodies directed to the PS2 N-terminal region and to the new C-terminus created by alternative transcription. PS2V protein levels were significantly increased by two-fold in AD cortex, as compared to age-matched controls. In tissue from the second collection, levels of PS2V were markedly elevated in some BP and SZ cases, but there was no overall difference between diagnostic groups. Our findings support previous evidence for increased expression of this variant PS2 isoform in sporadic AD and suggest this isoform may contribute to neurodegeneration.
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Affiliation(s)
- Margaret J Smith
- Department of Pathology, The University of Melbourne, and The Mental Health Research Institute of Victoria, Grattan St., Parkville, Victoria 3010, Australia
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