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Cao Y, Yan H, Sheng M, Liu Y, Yu X, Li Z, Xu W, Su Z. KAKU4 regulates leaf senescence through modulation of H3K27me3 deposition in the Arabidopsis genome. BMC PLANT BIOLOGY 2024; 24:177. [PMID: 38448830 PMCID: PMC10919013 DOI: 10.1186/s12870-024-04860-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2023] [Accepted: 02/23/2024] [Indexed: 03/08/2024]
Abstract
Lamins are the major components of the nuclear lamina, which regulate chromatin structure and gene expression. KAKU4 is a unique nuclear lamina component in the nuclear periphery, modulates nuclear shape and size in Arabidopsis. The knowledge about the regulatory role of KAKU4 in leaf development remains limited. Here we found that knockdown of KAKU4 resulted in an accelerated leaf senescence phenotype, with elevated levels of H2O2 and hormones, particularly SA, JA, and ABA. Our results demonstrated the importance of KAKU4 as a potential negative regulator in age-triggered leaf senescence in Arabidopsis. Furthermore, we conducted combination analyses of transcriptomic and epigenomic data for the kaku4 mutant and WT leaves. The knockdown of KAKU4 lowered H3K27me3 deposition in the up-regulated genes associated with hormone pathways, programmed cell death, and leaf senescence, including SARD1, SAG113/HAI1, PR2, and so forth. In addition, we found the functional crosstalks between KAKU4 and its associated proteins (CRWN1/4, PNET2, GBPL3, etc.) through comparing multiple transcriptome datasets. Overall, our results indicated that KAKU4 may inhibit the expression of a series of genes related to hormone signals and H2O2 metabolism by affecting the deposition of H3K27me3, thereby suppressing leaf senescence.
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Affiliation(s)
- Yaxin Cao
- State Key Laboratory of Plant Environmental Resilience, College of Biological Sciences, China Agricultural University, Beijing, 100193, China
| | - Hengyu Yan
- State Key Laboratory of Plant Environmental Resilience, College of Biological Sciences, China Agricultural University, Beijing, 100193, China
| | - Minghao Sheng
- State Key Laboratory of Plant Environmental Resilience, College of Biological Sciences, China Agricultural University, Beijing, 100193, China
| | - Yue Liu
- State Key Laboratory of Plant Environmental Resilience, College of Biological Sciences, China Agricultural University, Beijing, 100193, China
| | - Xinyue Yu
- State Key Laboratory of Plant Environmental Resilience, College of Biological Sciences, China Agricultural University, Beijing, 100193, China
| | - Zhongqiu Li
- State Key Laboratory of Plant Environmental Resilience, College of Biological Sciences, China Agricultural University, Beijing, 100193, China
| | - Wenying Xu
- State Key Laboratory of Plant Environmental Resilience, College of Biological Sciences, China Agricultural University, Beijing, 100193, China
| | - Zhen Su
- State Key Laboratory of Plant Environmental Resilience, College of Biological Sciences, China Agricultural University, Beijing, 100193, China.
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2
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Yan P, Ke B, Fang X. Bioinformatics reveals the pathophysiological relationship between diabetic nephropathy and periodontitis in the context of aging. Heliyon 2024; 10:e24872. [PMID: 38304805 PMCID: PMC10830875 DOI: 10.1016/j.heliyon.2024.e24872] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2023] [Revised: 01/08/2024] [Accepted: 01/16/2024] [Indexed: 02/03/2024] Open
Abstract
Diabetic nephropathy (DN) is one of the most common microvascular complications of diabetes mellitus. Periodontitis (PD) is a microbially-induced chronic inflammatory disease that is thought to have a bidirectional relationship with diabetes mellitus. DN and PD are recognized as models associated with accelerated aging. This study is divided into two parts, the first of which explores the bidirectional causal relationship through Mendelian randomization (MR). The second part aims to investigate the relationship between PD and DN in terms of potential crosstalk genes, aging-related genes, biological pathways, and processes using bioinformatic methods. MR analysis showed no evidence to support a causal relationship between DN and PD (P = 0.34) or PD and DN (P = 0.77). Using the GEO database, we screened 83 crosstalk genes overlapping in two diseases. Twelve paired genes identified by Pearson correlation and the four hub genes in the key cluster were jointly evaluated as key crosstalk-aging genes. Using support vector machine recursive feature elimination (SVM-RFE) and maximal clique centrality (MCC) algorithms, feature selection established five genes as the key crosstalk-aging genes. Based on five key genes, an ANN diagnostic model with reliable diagnosis of two diseases was developed. Gene enrichment analysis indicates that AGE-RAGE pathway signaling, the complement system, and multiple immune inflammatory pathways may be involved in common features of both diseases. Immune infiltration analysis reveals that most immune cells are differentially expressed in PD and DN, with dendritic cells and T cells assuming vital roles in both diseases. Overall, although there is no causal link, CSF1R, CXCL6, VCAM1, JUN and IL1B may be potential crosstalk-aging genes linking PD and DN. The common pathways and markers explored in this study could contribute to a deeper understanding of the common pathogenesis of both diseases in the context of aging and provide a theoretical basis for future research.
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Affiliation(s)
- Peng Yan
- Department of Nephrology, The Second Affiliated Hospital, Jiangxi Medical College, Nanchang University, Nanchang, China
| | - Ben Ke
- Department of Nephrology, The Second Affiliated Hospital, Jiangxi Medical College, Nanchang University, Nanchang, China
| | - Xiangdong Fang
- Department of Nephrology, The Second Affiliated Hospital, Jiangxi Medical College, Nanchang University, Nanchang, China
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3
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Kim Y. The impact of altered lamin B1 levels on nuclear lamina structure and function in aging and human diseases. Curr Opin Cell Biol 2023; 85:102257. [PMID: 37806292 DOI: 10.1016/j.ceb.2023.102257] [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: 07/28/2023] [Revised: 09/11/2023] [Accepted: 09/13/2023] [Indexed: 10/10/2023]
Abstract
The role of lamin B1 in human health and aging has attracted increasing attention as mounting evidence reveals its significance in diverse cellular processes. Both upregulation and downregulation of lamin B1 have been implicated in age-associated organ dysfunctions and various human diseases, including central nervous system disorders. Additionally, lamin B1 levels undergo alterations in cancer cells, and a tumor-specific association exists between lamin B1 abundance and cancer aggressiveness. Investigating the connectivity between lamin B1 abundance and human health is of utmost importance for further research. This review presents recent advancements in understanding lamin B1's role in nuclear lamina function and its implications for human health.
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Affiliation(s)
- Youngjo Kim
- Department of Integrated Biomedical Science and Soonchunhyang Institute of Medi-Bioscience, Soonchunhyang University, Cheon-an 31151, Republic of Korea.
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4
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Yang M, Liu C, Jiang N, Liu Y, Luo S, Li C, Zhao H, Han Y, Chen W, Li L, Xiao L, Sun L. Mitochondrial homeostasis: a potential target for delaying renal aging. Front Pharmacol 2023; 14:1191517. [PMID: 37397494 PMCID: PMC10308014 DOI: 10.3389/fphar.2023.1191517] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2023] [Accepted: 06/05/2023] [Indexed: 07/04/2023] Open
Abstract
Mitochondria, which are the energy factories of the cell, participate in many life activities, and the kidney is a high metabolic organ that contains abundant mitochondria. Renal aging is a degenerative process associated with the accumulation of harmful processes. Increasing attention has been given to the role of abnormal mitochondrial homeostasis in renal aging. However, the role of mitochondrial homeostasis in renal aging has not been reviewed in detail. Here, we summarize the current biochemical markers associated with aging and review the changes in renal structure and function during aging. Moreover, we also review in detail the role of mitochondrial homeostasis abnormalities, including mitochondrial function, mitophagy and mitochondria-mediated oxidative stress and inflammation, in renal aging. Finally, we describe some of the current antiaging compounds that target mitochondria and note that maintaining mitochondrial homeostasis is a potential strategy against renal aging.
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Affiliation(s)
- Ming Yang
- Department of Nephrology, The Second Xiangya Hospital of Central South University, Changsha, China
- Hunan Key Laboratory of Kidney Disease and Blood Purification, Changsha, Hunan, China
| | - Chongbin Liu
- Department of Nephrology, The Second Xiangya Hospital of Central South University, Changsha, China
- Hunan Key Laboratory of Kidney Disease and Blood Purification, Changsha, Hunan, China
| | - Na Jiang
- Department of Nephrology, The Second Xiangya Hospital of Central South University, Changsha, China
- Hunan Key Laboratory of Kidney Disease and Blood Purification, Changsha, Hunan, China
| | - Yan Liu
- Department of Nephrology, The Second Xiangya Hospital of Central South University, Changsha, China
- Hunan Key Laboratory of Kidney Disease and Blood Purification, Changsha, Hunan, China
| | - Shilu Luo
- Department of Nephrology, The Second Xiangya Hospital of Central South University, Changsha, China
- Hunan Key Laboratory of Kidney Disease and Blood Purification, Changsha, Hunan, China
| | - Chenrui Li
- Department of Nephrology, The Second Xiangya Hospital of Central South University, Changsha, China
- Hunan Key Laboratory of Kidney Disease and Blood Purification, Changsha, Hunan, China
| | - Hao Zhao
- Department of Nephrology, The Second Xiangya Hospital of Central South University, Changsha, China
- Hunan Key Laboratory of Kidney Disease and Blood Purification, Changsha, Hunan, China
| | - Yachun Han
- Department of Nephrology, The Second Xiangya Hospital of Central South University, Changsha, China
- Hunan Key Laboratory of Kidney Disease and Blood Purification, Changsha, Hunan, China
| | - Wei Chen
- Department of Nephrology, The Second Xiangya Hospital of Central South University, Changsha, China
- Hunan Key Laboratory of Kidney Disease and Blood Purification, Changsha, Hunan, China
| | - Li Li
- Department of Nephrology, The Second Xiangya Hospital of Central South University, Changsha, China
- Hunan Key Laboratory of Kidney Disease and Blood Purification, Changsha, Hunan, China
| | - Li Xiao
- Department of Nephrology, The Second Xiangya Hospital of Central South University, Changsha, China
- Hunan Key Laboratory of Kidney Disease and Blood Purification, Changsha, Hunan, China
| | - Lin Sun
- Department of Nephrology, The Second Xiangya Hospital of Central South University, Changsha, China
- Hunan Key Laboratory of Kidney Disease and Blood Purification, Changsha, Hunan, China
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5
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Kim HJ, Lee PCW, Hong JH. Overview of cellular homeostasis-associated nuclear envelope lamins and associated input signals. Front Cell Dev Biol 2023; 11:1173514. [PMID: 37250905 PMCID: PMC10213260 DOI: 10.3389/fcell.2023.1173514] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2023] [Accepted: 05/03/2023] [Indexed: 05/31/2023] Open
Abstract
With the discovery of the role of the nuclear envelope protein lamin in human genetic diseases, further diverse roles of lamins have been elucidated. The roles of lamins have been addressed in cellular homeostasis including gene regulation, cell cycle, cellular senescence, adipogenesis, bone remodeling as well as modulation of cancer biology. Features of laminopathies line with oxidative stress-associated cellular senescence, differentiation, and longevity and share with downstream of aging-oxidative stress. Thus, in this review, we highlighted various roles of lamin as key molecule of nuclear maintenance, specially lamin-A/C, and mutated LMNA gene clearly reveal aging-related genetic phenotypes, such as enhanced differentiation, adipogenesis, and osteoporosis. The modulatory roles of lamin-A/C in stem cell differentiation, skin, cardiac regulation, and oncology have also been elucidated. In addition to recent advances in laminopathies, we highlighted for the first kinase-dependent nuclear lamin biology and recently developed modulatory mechanisms or effector signals of lamin regulation. Advanced knowledge of the lamin-A/C proteins as diverse signaling modulators might be biological key to unlocking the complex signaling of aging-related human diseases and homeostasis in cellular process.
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Affiliation(s)
- Hyeong Jae Kim
- Department of Physiology, Lee Gil Ya Cancer and Diabetes Institute, Gachon University, Incheon, Republic of Korea
| | - Peter C. W. Lee
- Lung Cancer Research Center, Asan Medical Center, College of Medicine, University of Ulsan, Seoul, Republic of Korea
| | - Jeong Hee Hong
- Department of Physiology, Lee Gil Ya Cancer and Diabetes Institute, Gachon University, Incheon, Republic of Korea
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6
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Kristiani L, Kim Y. The Interplay between Oxidative Stress and the Nuclear Lamina Contributes to Laminopathies and Age-Related Diseases. Cells 2023; 12:cells12091234. [PMID: 37174634 PMCID: PMC10177617 DOI: 10.3390/cells12091234] [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: 04/04/2023] [Revised: 04/23/2023] [Accepted: 04/24/2023] [Indexed: 05/15/2023] Open
Abstract
Oxidative stress is a physiological condition that arises when there is an imbalance between the production of reactive oxygen species (ROS) and the ability of cells to neutralize them. ROS can damage cellular macromolecules, including lipids, proteins, and DNA, leading to cellular senescence and physiological aging. The nuclear lamina (NL) is a meshwork of intermediate filaments that provides structural support to the nucleus and plays crucial roles in various nuclear functions, such as DNA replication and transcription. Emerging evidence suggests that oxidative stress disrupts the integrity and function of the NL, leading to dysregulation of gene expression, DNA damage, and cellular senescence. This review highlights the current understanding of the interplay between oxidative stress and the NL, along with its implications for human health. Specifically, elucidation of the mechanisms underlying the interplay between oxidative stress and the NL is essential for the development of effective treatments for laminopathies and age-related diseases.
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Affiliation(s)
- Lidya Kristiani
- Department of Biomedicine, School of Life Science, Indonesia International Institute for Life Science, Jakarta 13210, Indonesia
| | - Youngjo Kim
- Department of Integrated Biomedical Science, Soonchunhyang Institute of Medi-Bioscience, Soonchunhyang University, Cheonan 31151, Republic of Korea
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Ma Y, Farny NG. Connecting the Dots: Neuronal Senescence, Stress Granules, and Neurodegeneration. Gene 2023; 871:147437. [PMID: 37084987 DOI: 10.1016/j.gene.2023.147437] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2023] [Revised: 04/09/2023] [Accepted: 04/14/2023] [Indexed: 04/23/2023]
Abstract
Cellular senescence increases with aging. While senescence is associated with an exit of the cell cycle, there is ample evidence that post-mitotic cells including neurons can undergo senescence as the brain ages, and that senescence likely contributes significantly to the progression of neurodegenerative diseases (ND) such as Alzheimer's Disease (AD) and Amyotrophic Lateral Sclerosis (ALS). Stress granules (SGs) are stress-induced cytoplasmic biomolecular condensates of RNA and proteins, which have been linked to the development of AD and ALS. The SG seeding hypothesis of NDs proposes that chronic stress in aging neurons results in static SGs that progress into pathological aggregates Alterations in SG dynamics have also been linked to senescence, though studies that link SGs and senescence in the context of NDs and the aging brain have not yet been performed. In this Review, we summarize the literature on senescence, and explore the contribution of senescence to the aging brain. We describe senescence phenotypes in aging neurons and glia, and their links to neuroinflammation and the development of AD and ALS. We further examine the relationships of SGs to senescence and to ND. We propose a new hypothesis that neuronal senescence may contribute to the mechanism of SG seeding in ND by altering SG dynamics in aged cells, thereby providing additional aggregation opportunities within aged neurons.
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Affiliation(s)
- Yizhe Ma
- Department of Biology and Biotechnology, Worcester Polytechnic Institute, Worcester, MA, USA
| | - Natalie G Farny
- Department of Biology and Biotechnology, Worcester Polytechnic Institute, Worcester, MA, USA.
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8
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Ji X, Gao J, Wei T, Jin L, Xiao G. Fear-of-intimacy-mediated zinc transport is required for Drosophila fat body endoreplication. BMC Biol 2023; 21:88. [PMID: 37069617 PMCID: PMC10111752 DOI: 10.1186/s12915-023-01588-0] [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: 08/19/2022] [Accepted: 04/03/2023] [Indexed: 04/19/2023] Open
Abstract
BACKGROUND Endoreplication is involved in the development and function of many organs, the pathologic process of several diseases. However, the metabolic underpinnings and regulation of endoreplication have yet to be well clarified. RESULTS Here, we showed that a zinc transporter fear-of-intimacy (foi) is necessary for Drosophila fat body endoreplication. foi knockdown in the fat body led to fat body cell nuclei failure to attain standard size, decreased fat body size and pupal lethality. These phenotypes could be modulated by either altered expression of genes involved in zinc metabolism or intervention of dietary zinc levels. Further studies indicated that the intracellular depletion of zinc caused by foi knockdown results in oxidative stress, which activates the ROS-JNK signaling pathway, and then inhibits the expression of Myc, which is required for tissue endoreplication and larval growth in Drosophila. CONCLUSIONS Our results indicated that FOI is critical in coordinating fat body endoreplication and larval growth in Drosophila. Our study provides a novel insight into the relationship between zinc and endoreplication in insects and may provide a reference for relevant mammalian studies.
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Affiliation(s)
- Xiaowen Ji
- China Light Industry Key Laboratory of Meat Microbial Control and Utilization, Hefei University of Technology, Hefei, 230009, China
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, 230009, China
| | - Jiajia Gao
- China Light Industry Key Laboratory of Meat Microbial Control and Utilization, Hefei University of Technology, Hefei, 230009, China
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, 230009, China
| | - Tian Wei
- China Light Industry Key Laboratory of Meat Microbial Control and Utilization, Hefei University of Technology, Hefei, 230009, China
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, 230009, China
- Department of Toxicology, School of Public Health, Anhui Medical University, Hefei, 230032, China
| | - Li Jin
- China Light Industry Key Laboratory of Meat Microbial Control and Utilization, Hefei University of Technology, Hefei, 230009, China
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, 230009, China
| | - Guiran Xiao
- China Light Industry Key Laboratory of Meat Microbial Control and Utilization, Hefei University of Technology, Hefei, 230009, China.
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, 230009, China.
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9
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Pezone A, Olivieri F, Napoli MV, Procopio A, Avvedimento EV, Gabrielli A. Inflammation and DNA damage: cause, effect or both. Nat Rev Rheumatol 2023; 19:200-211. [PMID: 36750681 DOI: 10.1038/s41584-022-00905-1] [Citation(s) in RCA: 16] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/23/2022] [Indexed: 02/09/2023]
Abstract
Inflammation is a biological response involving immune cells, blood vessels and mediators induced by endogenous and exogenous stimuli, such as pathogens, damaged cells or chemicals. Unresolved (chronic) inflammation is characterized by the secretion of cytokines that maintain inflammation and redox stress. Mitochondrial or nuclear redox imbalance induces DNA damage, which triggers the DNA damage response (DDR) that is orchestrated by ATM and ATR kinases, which modify gene expression and metabolism and, eventually, establish the senescent phenotype. DDR-mediated senescence is induced by the signalling proteins p53, p16 and p21, which arrest the cell cycle in G1 or G2 and promote cytokine secretion, producing the senescence-associated secretory phenotype. Senescence and inflammation phenotypes are intimately associated, but highly heterogeneous because they vary according to the cell type that is involved. The vicious cycle of inflammation, DNA damage and DDR-mediated senescence, along with the constitutive activation of the immune system, is the core of an evolutionarily conserved circuitry, which arrests the cell cycle to reduce the accumulation of mutations generated by DNA replication during redox stress caused by infection or inflammation. Evidence suggests that specific organ dysfunctions in apparently unrelated diseases of autoimmune, rheumatic, degenerative and vascular origins are caused by inflammation resulting from DNA damage-induced senescence.
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Affiliation(s)
- Antonio Pezone
- Dipartimento di Biologia, Università Federico II, Napoli, Italy.
| | - Fabiola Olivieri
- Dipartimento di Scienze Cliniche e Molecolari, DISCLIMO, Università Politecnica delle Marche, Ancona, Italy
- Clinica di Medicina di Laboratorio e di Precisione, IRCCS INRCA, Ancona, Italy
| | - Maria Vittoria Napoli
- Dipartimento di Scienze Cliniche e Molecolari, DISCLIMO, Università Politecnica delle Marche, Ancona, Italy
| | - Antonio Procopio
- Dipartimento di Scienze Cliniche e Molecolari, DISCLIMO, Università Politecnica delle Marche, Ancona, Italy
- Clinica di Medicina di Laboratorio e di Precisione, IRCCS INRCA, Ancona, Italy
| | - Enrico Vittorio Avvedimento
- Dipartimento di Medicina Molecolare e Biotecnologie Mediche, Istituto di Endocrinologia ed Oncologia Sperimentale del C.N.R., Università Federico II, Napoli, Italy.
| | - Armando Gabrielli
- Fondazione di Medicina Molecolare e Terapia Cellulare, Università Politecnica delle Marche, Ancona, Italy.
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10
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Mehl JL, Earle A, Lammerding J, Mhlanga M, Vogel V, Jain N. Blockage of lamin-A/C loss diminishes the pro-inflammatory macrophage response. iScience 2022; 25:105528. [PMID: 36465100 PMCID: PMC9708799 DOI: 10.1016/j.isci.2022.105528] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2022] [Revised: 08/09/2022] [Accepted: 11/04/2022] [Indexed: 11/09/2022] Open
Abstract
Mutations and defects in nuclear lamins can cause major pathologies, including inflammation and inflammatory diseases. Yet, the underlying molecular mechanisms are not known. We now report that the pro-inflammatory activation of macrophages, as induced by LPS or pathogenic E. coli, reduces Lamin-A/C levels thereby augmenting pro-inflammatory gene expression and cytokine secretion. We show that the activation of bone-marrow-derived macrophages (BMDMs) causes the phosphorylation and degradation of Lamin-A/C, as mediated by CDK1 and Caspase-6, respectively, necessary for upregulating IFN-β expression. Enhanced IFN-β expression subsequently increases pro-inflammatory gene expression via the IFN-β-STAT axis. Pro-inflammatory gene expression was also amplified in the complete absence of Lamin-A/C. Alternatively, pharmacological inhibition of either Lamin-A/C phosphorylation or degradation significantly downregulated pro-inflammatory gene expression, as did the targeting of IFN-β-STAT pathway members, i.e. phospho-STAT1 and phospho-STAT3. As Lamin-A/C is a previously unappreciated regulator of the pro-inflammatory macrophage response, our findings suggest novel opportunities to treat inflammatory diseases.
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Affiliation(s)
- Johanna L. Mehl
- Laboratory of Applied Mechanobiology, Institute of Translational Medicine, Department of Health Sciences and Technology, ETH Zurich, Vladimir-Prelog-Weg 1–5/10, HCI E357.1, Zurich 8093, Switzerland
| | - Ashley Earle
- Meinig School of Biomedical Engineering & Weill Institute for Cell and Molecular Biology, Cornell University, Ithaca, NY, USA,Department of Civil and Mechanical Engineering, York College of Pennsylvania, York, PA, USA
| | - Jan Lammerding
- Meinig School of Biomedical Engineering & Weill Institute for Cell and Molecular Biology, Cornell University, Ithaca, NY, USA
| | - Musa Mhlanga
- Radboud Institute of Molecular Life Sciences, Radboud University, Nijmegen, the Netherlands
| | - Viola Vogel
- Laboratory of Applied Mechanobiology, Institute of Translational Medicine, Department of Health Sciences and Technology, ETH Zurich, Vladimir-Prelog-Weg 1–5/10, HCI E357.1, Zurich 8093, Switzerland,Corresponding author
| | - Nikhil Jain
- Laboratory of Applied Mechanobiology, Institute of Translational Medicine, Department of Health Sciences and Technology, ETH Zurich, Vladimir-Prelog-Weg 1–5/10, HCI E357.1, Zurich 8093, Switzerland,Corresponding author
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11
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Selezneva A, Gibb AJ, Willis D. The Nuclear Envelope as a Regulator of Immune Cell Function. Front Immunol 2022; 13:840069. [PMID: 35757775 PMCID: PMC9226455 DOI: 10.3389/fimmu.2022.840069] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Accepted: 05/10/2022] [Indexed: 01/07/2023] Open
Abstract
The traditional view of the nuclear envelope (NE) was that it represented a relatively inert physical barrier within the cell, whose main purpose was to separate the nucleoplasm from the cytoplasm. However, recent research suggests that this is far from the case, with new and important cellular functions being attributed to this organelle. In this review we describe research suggesting an important contribution of the NE and its constituents in regulating the functions of cells of the innate and adaptive immune system. One of the standout properties of immune cells is their ability to migrate around the body, allowing them to carry out their physiological/pathophysiology cellular role at the appropriate location. This together with the physiological role of the tissue, changes in tissue matrix composition due to disease and aging, and the activation status of the immune cell, all result in immune cells being subjected to different mechanical forces. We report research which suggests that the NE may be an important sensor/transducer of these mechanical signals and propose that the NE is an integrator of both mechanical and chemical signals, allowing the cells of the innate immune system to precisely regulate gene transcription and functionality. By presenting this overview we hope to stimulate the interests of researchers into this often-overlooked organelle and propose it should join the ranks of mitochondria and phagosome, which are important organelles contributing to immune cell function.
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Affiliation(s)
- Anna Selezneva
- Department of Neuroscience, Physiology & Pharmacology, University College London, London, United Kingdom
| | - Alasdair J Gibb
- Department of Neuroscience, Physiology & Pharmacology, University College London, London, United Kingdom
| | - Dean Willis
- Department of Neuroscience, Physiology & Pharmacology, University College London, London, United Kingdom
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12
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LINCing Senescence and Nuclear Envelope Changes. Cells 2022; 11:cells11111787. [PMID: 35681483 PMCID: PMC9179861 DOI: 10.3390/cells11111787] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2022] [Revised: 05/23/2022] [Accepted: 05/24/2022] [Indexed: 01/27/2023] Open
Abstract
The nuclear envelope (NE) has emerged as a nexus for cellular organization, signaling, and survival. Beyond its role as a barrier to separate the nucleoplasm from the cytoplasm, the NE's role in supporting and maintaining a myriad of other functions has made it a target of study in many cellular processes, including senescence. The nucleus undergoes dramatic changes in senescence, many of which are driven by changes in the NE. Indeed, Lamin B1, a key NE protein that is consistently downregulated in senescence, has become a marker for senescence. Other NE proteins have also been shown to play a role in senescence, including LINC (linker of nucleoskeleton and cytoskeleton) complex proteins. LINC complexes span the NE, forming physical connections between the cytoplasm to the nucleoplasm. In this way, they integrate nuclear and cytoplasmic mechanical signals and are essential not only for a variety of cellular functions but are needed for cell survival. However, LINC complex proteins have been shown to have a myriad of functions in addition to forming a LINC complex, often existing as nucleoplasmic or cytoplasmic soluble proteins in a variety of isoforms. Some of these proteins have now been shown to play important roles in DNA repair, cell signaling, and nuclear shape regulation, all of which are important in senescence. This review will focus on some of these roles and highlight the importance of LINC complex proteins in senescence.
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13
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Cueto-Manzano AM, Romero-García AR, Cortés-Sanabria L, Márquez-Herrera RM, Martin-del-Campo F, Jacobo-Arias F, Pazarín-Villaseñor HL, Rojas-Campos E. Systemic inflammation May limit the effect of protein supplement on nutritional status in peritoneal dialysis. Clin Nutr ESPEN 2022; 49:307-313. [DOI: 10.1016/j.clnesp.2022.03.033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2021] [Revised: 02/27/2022] [Accepted: 03/19/2022] [Indexed: 10/18/2022]
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14
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Lee JM, Lee JH, Song MK, Kim YJ. NXP032 Ameliorates Aging-Induced Oxidative Stress and Cognitive Impairment in Mice through Activation of Nrf2 Signaling. Antioxidants (Basel) 2022; 11:antiox11010130. [PMID: 35052634 PMCID: PMC8772799 DOI: 10.3390/antiox11010130] [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: 12/07/2021] [Revised: 12/31/2021] [Accepted: 01/04/2022] [Indexed: 02/01/2023] Open
Abstract
Aging is a neurodegenerative disease that leads to cognitive impairment, and an increase in oxidative stress as a major cause is an important factor. It has been reported that aging-related cognitive impairment is associated with increased oxidative damage in several brain regions during aging. As a powerful antioxidant, vitamin C plays an important role in preventing oxidative stress, but due to its unstable chemical properties, it is easily oxidized and thus the activity of antioxidants is reduced. In order to overcome this easily oxidized vulnerability, we developed NXP032 (vitamin C/DNA aptamer complex) that can enhance the antioxidant efficacy of vitamin C using an aptamer. We developed NXP032 (vitamin C/DNA Aptamin C320 complex) that can enhance the antioxidant efficacy of vitamin C using an aptamer. In the present study, we evaluated the neuroprotective effects of NXP032 on aging-induced cognitive decline, oxidative stress, and neuronal damage in 17-month-old female mice. NXP032 was orally administered at 200 mg/kg of ascorbic acid and 4 mg/kg of DNA aptamer daily for eight weeks. Before the sacrifice, a cognitive behavioral test was performed. Administration of NXP032 alleviated cognitive impairment, neuronal damage, microglia activity, and oxidative stress due to aging. We found that although aging decreases the Nrf2-ARE pathway, NXP032 administration activates the Nrf2-ARE pathway to increase the expression of SOD-1 and GSTO1/2. The results suggest that the new aptamer complex NXP032 may be a therapeutic intervention to alleviate aging-induced cognitive impairment and oxidative stress.
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Affiliation(s)
- Jae-Min Lee
- College of Nursing Science, Kyung Hee University, Seoul 02447, Korea;
| | - Joo Hee Lee
- Department of Nursing, Graduate School, Kyung Hee University, Seoul 02447, Korea;
| | - Min Kyung Song
- Robert Wood Johnson Medical School, Institute for Neurological Therapeutics, Rutgers Biomedical and Health Sciences, Piscataway, NJ 08854, USA;
| | - Youn-Jung Kim
- College of Nursing Science, Kyung Hee University, Seoul 02447, Korea;
- Correspondence: ; Tel.: +82-2-961-0311
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Abadie S, Leduc C, Lintner K, Bedos P. The alkaloid centcyamine increases expression of klotho and lamin B1, slowing the onset of skin ageing in vitro and in vivo. Int J Cosmet Sci 2021; 43:561-572. [PMID: 34403147 DOI: 10.1111/ics.12731] [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: 05/31/2021] [Revised: 07/07/2021] [Accepted: 08/04/2021] [Indexed: 11/26/2022]
Abstract
BACKGROUND Klotho is a protein known for its beneficial effects on longevity. Centcyamine is an alkaloid present in certain plants whose extracts have an anti-inflammatory effect. Skin fibroblasts are essential to the formation and structure of the dermis. OBJECTIVE Centcyamine is an indole-based alkaloid composed of coumaric acid, a resveratrol precursor and methoxytryptamine, which can be both a precursor, or a derivative, of melatonin. Given these building blocks and their well-known bioactivities, it was of interest to explore the potential benefits of using this aryl-alkaloid, in cosmetic skincare applications. METHODS We tested cultured normal human dermal fibroblasts (NHDF) in vitro to observe how supplementation with centcyamine improves properties of the cells to counteract the effect of ageing. The expression of genes and proteins of interest was quantified. The effect on doubling time and cell function was evaluated following treatment of the cells over several replication cycles. Skin firmness, red spot index and skin isotropy were measured with Dynaskin® , Visia® and Primos® equipment, respectively, and compared over two months in a vehicle-controlled clinical trial on 60 persons. RESULTS Centcyamine activates the expression of the gene KL and the related protein Klotho in dermal fibroblasts. Moreover, centcyamine slows the replicative ageing process of fibroblasts in culture. These cells retain cellular functions identical to those of young cells: the synthesis of lamin B1, a crucial regulatory protein of proliferation, as well as of collagen I and elastin is retained in aged cells. The clinical data are shown to improve skin isotropy in a majority of subjects, to reduce the red spot intensity and to maintain skin firmness in the treated group vs. the vehicle. CONCLUSION The alkaloid centcyamine induces changes in the metabolism of the ageing process of human dermal fibroblasts. The up-to-now unobserved implication of both Klotho and lamin B1 to maintain homeostasis of the skin opens new venues for the prevention of age-related changes in skin structure. The in vitro and clinical data, while not demonstrated to be causally related, converge towards a common goal of skin repair and slower ageing processes.
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Gumina S, Peruzzi B, Leopizzi M, Porta N, Di Maio V, Rocca CD, Candela V. Nuclear lamin A in rotator cuff tear margin tenocytes: an antiapoptotic and cell mechanostat factor. J Orthop Surg Res 2021; 16:413. [PMID: 34193225 PMCID: PMC8243552 DOI: 10.1186/s13018-021-02569-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/28/2021] [Accepted: 06/17/2021] [Indexed: 12/03/2022] Open
Abstract
Background The network of intermediate filament proteins underlying the inner nuclear membrane forms the nuclear lamin. A- and B-type lamins are the major components of the nuclear lamina. Lamins function in many nuclear activities. The role of lamin A and transcription factors (NF-kB) as anti-apoptotic is well documented. Recently, lamin A has also been considered as a mechanosensor protein that is able to maintain nuclear integrity from mechanical insults. We aimed to verify how lamin A expression varies in healthy cuff cells and in those with different-sized tears where various mechanical stresses are present. Methods Forty-three patients with rotator cuff tear (RCT) [23M–20F, mean age (SD): 63.5 (6.1)] were enrolled. Tissue samples excised from the most medial point of tear margins were analyzed for lamin A expression by immunohistochemistry. Controls were represented by samples obtained by normal supraspinatus tendons excised from patients submitted to reverse shoulder prosthesis implant [8M–7F, mean age (SD): 67.9 (7.1)]. The intensity of staining was graded, and an H-score was assigned. Statistical analysis was performed. Results Our study revealed a moderate intensity of lamin A in the healthy cuff tendons, a higher expression of this protein in the small tears, and a significant decrease of lamin A with increasing tear size (p < 0.0001). Conclusions Our study emphasizes the importance of early repair of small RCTs since nuclear stability is maintained, and the cellular function is protected by lamin A overexpression. High re-tear of massive cuff repair could be due to cellular apoptosis and nuclear modifications induced by lamin A lack. Level of evidence III
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Affiliation(s)
- Stefano Gumina
- Department of Anatomical, Histological, Forensic Medicine and Orthopaedics Sciences, Sapienza University of Rome, Istituto Clinico Ortopedico Traumatologico (ICOT), Latina, Italy
| | - Barbara Peruzzi
- Multifactorial Disease and Complex Phenotype Research Area, IRCCS Bambino Gesù Children's Hospital, Rome, Italy
| | - Martina Leopizzi
- Department of Medico-Surgical Science and Biothecnologies, Sapienza University of Rome, Polo Pontino, Latina, Italy
| | - Natale Porta
- Department of Medico-Surgical Science and Biothecnologies, Sapienza University of Rome, Polo Pontino, Latina, Italy
| | - Valeria Di Maio
- Department of Medico-Surgical Science and Biothecnologies, Sapienza University of Rome, Polo Pontino, Latina, Italy
| | - Carlo Della Rocca
- Department of Medico-Surgical Science and Biothecnologies, Sapienza University of Rome, Polo Pontino, Latina, Italy
| | - Vittorio Candela
- Department of Anatomical, Histological, Forensic Medicine and Orthopaedics Sciences, Sapienza University of Rome, Istituto Clinico Ortopedico Traumatologico (ICOT), Latina, Italy.
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Yeo GEC, Ng MH, Nordin FB, Law JX. Potential of Mesenchymal Stem Cells in the Rejuvenation of the Aging Immune System. Int J Mol Sci 2021; 22:5749. [PMID: 34072224 PMCID: PMC8198707 DOI: 10.3390/ijms22115749] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Revised: 05/22/2021] [Accepted: 05/24/2021] [Indexed: 12/14/2022] Open
Abstract
Rapid growth of the geriatric population has been made possible with advancements in pharmaceutical and health sciences. Hence, age-associated diseases are becoming more common. Aging encompasses deterioration of the immune system, known as immunosenescence. Dysregulation of the immune cell production, differentiation, and functioning lead to a chronic subclinical inflammatory state termed inflammaging. The hallmarks of the aging immune system are decreased naïve cells, increased memory cells, and increased serum levels of pro-inflammatory cytokines. Mesenchymal stem cell (MSC) transplantation is a promising solution to halt immunosenescence as the cells have excellent immunomodulatory functions and low immunogenicity. This review compiles the present knowledge of the causes and changes of the aging immune system and the potential of MSC transplantation as a regenerative therapy for immunosenescence.
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Affiliation(s)
| | | | | | - Jia Xian Law
- Centre for Tissue Engineering and Regenerative Medicine, Faculty of Medicine, Universiti Kebangsaan Malaysia Medical Centre, Jalan Yaacob Latif, Cheras 56000, Malaysia; (G.E.C.Y.); (M.H.N.); (F.B.N.)
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18
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Ho TT, Dellorusso PV, Verovskaya EV, Bakker ST, Flach J, Smith LK, Ventura PB, Lansinger OM, Hérault A, Zhang SY, Kang YA, Mitchell CA, Villeda SA, Passegué E. Aged hematopoietic stem cells are refractory to bloodborne systemic rejuvenation interventions. J Exp Med 2021; 218:212183. [PMID: 34032859 PMCID: PMC8155813 DOI: 10.1084/jem.20210223] [Citation(s) in RCA: 43] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2021] [Revised: 03/24/2021] [Accepted: 04/15/2021] [Indexed: 01/13/2023] Open
Abstract
While young blood can restore many aged tissues, its effects on the aged blood system itself and old hematopoietic stem cells (HSCs) have not been determined. Here, we used transplantation, parabiosis, plasma transfer, exercise, calorie restriction, and aging mutant mice to understand the effects of age-regulated systemic factors on HSCs and their bone marrow (BM) niche. We found that neither exposure to young blood, nor long-term residence in young niches after parabiont separation, nor direct heterochronic transplantation had any observable rejuvenating effects on old HSCs. Likewise, exercise and calorie restriction did not improve old HSC function, nor old BM niches. Conversely, young HSCs were not affected by systemic pro-aging conditions, and HSC function was not impacted by mutations influencing organismal aging in established long-lived or progeroid genetic models. Therefore, the blood system that carries factors with either rejuvenating or pro-aging properties for many other tissues is itself refractory to those factors.
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Affiliation(s)
- Theodore T Ho
- The Eli and Edythe Broad Center for Regenerative Medicine and Stem Cell Research, Department of Medicine, Hematology/Oncology Division, University of California, San Francisco, San Francisco, CA
| | - Paul V Dellorusso
- Columbia Stem Cell Initiative, Department of Genetics and Development, Columbia University Irving Medical Center, New York, NY
| | - Evgenia V Verovskaya
- The Eli and Edythe Broad Center for Regenerative Medicine and Stem Cell Research, Department of Medicine, Hematology/Oncology Division, University of California, San Francisco, San Francisco, CA.,Columbia Stem Cell Initiative, Department of Genetics and Development, Columbia University Irving Medical Center, New York, NY
| | - Sietske T Bakker
- The Eli and Edythe Broad Center for Regenerative Medicine and Stem Cell Research, Department of Medicine, Hematology/Oncology Division, University of California, San Francisco, San Francisco, CA
| | - Johanna Flach
- The Eli and Edythe Broad Center for Regenerative Medicine and Stem Cell Research, Department of Medicine, Hematology/Oncology Division, University of California, San Francisco, San Francisco, CA
| | - Lucas K Smith
- Department of Anatomy, University of California, San Francisco, San Francisco, CA
| | - Patrick B Ventura
- Department of Anatomy, University of California, San Francisco, San Francisco, CA
| | - Olivia M Lansinger
- The Eli and Edythe Broad Center for Regenerative Medicine and Stem Cell Research, Department of Medicine, Hematology/Oncology Division, University of California, San Francisco, San Francisco, CA
| | - Aurélie Hérault
- The Eli and Edythe Broad Center for Regenerative Medicine and Stem Cell Research, Department of Medicine, Hematology/Oncology Division, University of California, San Francisco, San Francisco, CA
| | - Si Yi Zhang
- The Eli and Edythe Broad Center for Regenerative Medicine and Stem Cell Research, Department of Medicine, Hematology/Oncology Division, University of California, San Francisco, San Francisco, CA
| | - Yoon-A Kang
- The Eli and Edythe Broad Center for Regenerative Medicine and Stem Cell Research, Department of Medicine, Hematology/Oncology Division, University of California, San Francisco, San Francisco, CA.,Columbia Stem Cell Initiative, Department of Genetics and Development, Columbia University Irving Medical Center, New York, NY
| | - Carl A Mitchell
- Columbia Stem Cell Initiative, Department of Genetics and Development, Columbia University Irving Medical Center, New York, NY
| | - Saul A Villeda
- Department of Anatomy, University of California, San Francisco, San Francisco, CA
| | - Emmanuelle Passegué
- The Eli and Edythe Broad Center for Regenerative Medicine and Stem Cell Research, Department of Medicine, Hematology/Oncology Division, University of California, San Francisco, San Francisco, CA.,Columbia Stem Cell Initiative, Department of Genetics and Development, Columbia University Irving Medical Center, New York, NY
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19
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Age-dependent changes in nuclear-cytoplasmic signaling in skeletal muscle. Exp Gerontol 2021; 150:111338. [PMID: 33862137 DOI: 10.1016/j.exger.2021.111338] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2021] [Revised: 03/28/2021] [Accepted: 04/03/2021] [Indexed: 02/07/2023]
Abstract
Mechanical forces are conducted through myofibers and into nuclei to regulate muscle development, hypertrophy, and homeostasis. We hypothesized that nuclei in aged muscle have changes in the nuclear envelope and associated proteins, resulting in altered markers of mechano-signaling. METHODS YAP/TAZ protein expression and gene expression of downstream targets, Ankrd1 and Cyr61, were evaluated as mechanotransduction indicators. Expression of proteins in the nuclear lamina and the nuclear pore complex (NPC) were assessed, and nuclear morphology was characterized by electron microscopy. Nuclear envelope permeability was assessed by uptake of 70 kDa fluorescent dextran. RESULTS Nuclear changes with aging included a relative decrease of lamin β1 and Nup107, and a relative increase in Nup93, which could underlie the aberrant nuclear morphology, increased nuclear leakiness, and elevated YAP/TAZ signaling. CONCLUSION Aged muscles have hyperactive nuclear-cytoplasmic signaling, indicative of altered nuclear mechanotransduction. These data highlight a possible role for the nucleus in aging-related aberrant mechano-sensing.
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20
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Huang Y, Ye H, Zhu F, Hu C, Zheng Y. The role of Chito-oligosaccharide in regulating ovarian germ stem cells function and restoring ovarian function in chemotherapy mice. Reprod Biol Endocrinol 2021; 19:14. [PMID: 33494759 PMCID: PMC7830852 DOI: 10.1186/s12958-021-00699-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/08/2020] [Accepted: 01/08/2021] [Indexed: 12/31/2022] Open
Abstract
In recent years, the discovery of ovarian germ stem cells (OGSCs) has provided a new research direction for the treatment of female infertility. The ovarian microenvironment affects the proliferation and differentiation of OGSCs, and immune cells and related cytokines are important components of the microenvironment. However, whether improving the ovarian microenvironment can regulate the proliferation of OGSCs and remodel ovarian function has not been reported. In this study, we chelated chito-oligosaccharide (COS) with fluorescein isothiocyanate (FITC) to track the distribution of COS in the body. COS was given to mice through the best route of administration, and the changes in ovarian and immune function were detected using assays of organ index, follicle counting, serum estrogen (E2) and anti-Mullerian hormone (AMH) levels, and the expression of IL-2 and TNF-α in the ovaries. We found that COS significantly increased the organ index of the ovary and immune organs, reduced the rate of follicular atresia, increased the levels of E2 and AMH hormones, and increased the protein expression of IL-2 and TNF-α in the ovary. Then, COS and OGSCs were co-cultured to observe the combination of COS and OGSCs, and measure the survival rate of OGSCs. With increasing time, the fluorescence intensity of cells gradually increased, and the cytokines IL-2 and TNF-α significantly promoted the proliferation of OGSCs. In conclusion, COS could significantly improve the ovarian and immune function of chemotherapy model mice, and improve the survival rate of OGSCs, which provided a preliminary blueprint for further exploring the mechanism of COS in protecting ovarian function.
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Affiliation(s)
- Yaoqi Huang
- Department of Obstetrics & Gynecology, the Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, China
| | - Haifeng Ye
- Comprehensive Pneumology Center, Institute of Lung Biology and Disease, Helmholtz Zentrum München, Munich, Germany
| | - Feiyin Zhu
- Jiangxi Medical College, Nanchang University, Nanchang, Jiangxi, China
| | - Chuan Hu
- Jiangxi Medical College, Nanchang University, Nanchang, Jiangxi, China.
| | - Yuehui Zheng
- Department of reproductive health, Shenzhen Traditional Chinese Medicine Hospital, Shenzhen, Guangdong, China.
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21
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Tran JR, Paulson DI, Moresco JJ, Adam SA, Yates JR, Goldman RD, Zheng Y. An APEX2 proximity ligation method for mapping interactions with the nuclear lamina. J Cell Biol 2021; 220:e202002129. [PMID: 33306092 PMCID: PMC7737704 DOI: 10.1083/jcb.202002129] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2020] [Revised: 10/19/2020] [Accepted: 10/29/2020] [Indexed: 01/13/2023] Open
Abstract
The nuclear lamina (NL) is a meshwork found beneath the inner nuclear membrane. The study of the NL is hindered by the insolubility of the meshwork and has driven the development of proximity ligation methods to identify the NL-associated/proximal proteins, RNA, and DNA. To simplify and improve temporal labeling, we fused APEX2 to the NL protein lamin-B1 to map proteins, RNA, and DNA. The identified NL-interacting/proximal RNAs show a long 3' UTR bias, a finding consistent with an observed bias toward longer 3' UTRs in genes deregulated in lamin-null cells. A C-rich motif was identified in these 3' UTR. Our APEX2-based proteomics identifies a C-rich motif binding regulatory protein that exhibits altered localization in lamin-null cells. Finally, we use APEX2 to map lamina-associated domains (LADs) during the cell cycle and uncover short, H3K27me3-rich variable LADs. Thus, the APEX2-based tools presented here permit identification of proteomes, transcriptomes, and genome elements associated with or proximal to the NL.
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Affiliation(s)
- Joseph R. Tran
- Carnegie Institution for Science, Department of Embryology, Baltimore, MD
| | - Danielle I. Paulson
- Carnegie Institution for Science, Department of Embryology, Baltimore, MD
- Horace Mann School, The Bronx, NY
| | - James J. Moresco
- The Scripps Research Institution, Department of Molecular Medicine, La Jolla, CA
| | - Stephen A. Adam
- Northwestern University, Feinberg School of Medicine, Department of Cell and Developmental Biology, Chicago, IL
| | - John R. Yates
- The Scripps Research Institution, Department of Molecular Medicine, La Jolla, CA
| | - Robert D. Goldman
- Northwestern University, Feinberg School of Medicine, Department of Cell and Developmental Biology, Chicago, IL
| | - Yixian Zheng
- Carnegie Institution for Science, Department of Embryology, Baltimore, MD
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Wang Y, Zhu S, Wei W, Tu Y, Chen C, Song J, Li J, Wang C, Xu Z, Sun S. Interleukin-6 knockout reverses macrophage differentiation imbalance and alleviates cardiac dysfunction in aging mice. Aging (Albany NY) 2020; 12:20184-20197. [PMID: 33099539 PMCID: PMC7655174 DOI: 10.18632/aging.103749] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2020] [Accepted: 06/01/2020] [Indexed: 12/18/2022]
Abstract
Several interleukins (ILs) have been shown to be involved in aging, but the effects of IL-6 on aging-related cardiac dysfunction remain unknown. In this study, the expression and sources of cardiac IL-6 in aging hearts were investigated for the first time. The results showed that cardiac IL-6 expression in mice gradually increased with age, and the expression at 16 months, 20 months and 25 months was higher than that at 3 months. In addition, cardiac macrophages (Møs) were shown to be the main sources of IL-6 in aging mice. IL-6 knockout (KO) significantly alleviated cardiac dysfunction, increased M2 macrophage (Mø2) differentiation, reduced M1 macrophage (Mø1) differentiation and protected against cardiomyocyte apoptosis in aging mice. IL-6 KO also reversed the stimulatory effect of doxorubicin (DOX) treatment on Mø1s and the inhibitory effect of DOX treatment on Mø2s in vitro. Furthermore, the mRNA expression of both aging markers and apoptosis-related markers was markedly inhibited by IL-6 KO. Our results suggest that aging can be significantly reversed by IL-6 KO and that the mechanisms of this effect are related to alleviation of Mø1/Mø2 imbalance and protection against apoptosis in cardiomyocytes.
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Affiliation(s)
- Yuan Wang
- Department of Thyroid Breast Surgery, Renmin Hospital of Wuhan University, Wuhan 430060, China
| | - Shan Zhu
- Department of Thyroid Breast Surgery, Renmin Hospital of Wuhan University, Wuhan 430060, China
| | - Wen Wei
- Department of Thyroid Breast Surgery, Renmin Hospital of Wuhan University, Wuhan 430060, China
| | - Yi Tu
- Department of Thyroid Breast Surgery, Renmin Hospital of Wuhan University, Wuhan 430060, China
| | - Chuang Chen
- Department of Thyroid Breast Surgery, Renmin Hospital of Wuhan University, Wuhan 430060, China
| | - Junlong Song
- Department of Thyroid Breast Surgery, Renmin Hospital of Wuhan University, Wuhan 430060, China
| | - Juanjuan Li
- Department of Thyroid Breast Surgery, Renmin Hospital of Wuhan University, Wuhan 430060, China
| | - Changhua Wang
- Basic Medical School of Wuhan University, Wuhan 430060, China
| | - Zhiliang Xu
- Department of Thyroid Breast Surgery, Renmin Hospital of Wuhan University, Wuhan 430060, China
| | - Shengrong Sun
- Department of Thyroid Breast Surgery, Renmin Hospital of Wuhan University, Wuhan 430060, China
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Hemokinin-1 Gene Expression Is Upregulated in Trigeminal Ganglia in an Inflammatory Orofacial Pain Model: Potential Role in Peripheral Sensitization. Int J Mol Sci 2020; 21:ijms21082938. [PMID: 32331300 PMCID: PMC7215309 DOI: 10.3390/ijms21082938] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2020] [Revised: 04/12/2020] [Accepted: 04/19/2020] [Indexed: 12/19/2022] Open
Abstract
A large percentage of primary sensory neurons in the trigeminal ganglia (TG) contain neuropeptides such as tachykinins or calcitonin gene-related peptide. Neuropeptides released from the central terminals of primary afferents sensitize the secondary nociceptive neurons in the trigeminal nucleus caudalis (TNC), but also activate glial cells contributing to neuroinflammation and consequent sensitization in chronic orofacial pain and migraine. In the present study, we investigated the newest member of the tachykinin family, hemokinin-1 (HK-1) encoded by the Tac4 gene in the trigeminal system. HK-1 had been shown to participate in inflammation and hyperalgesia in various models, but its role has not been investigated in orofacial pain or headache. In the complete Freund’s adjuvant (CFA)-induced inflammatory orofacial pain model, we showed that Tac4 expression increased in the TG in response to inflammation. Duration-dependent Tac4 upregulation was associated with the extent of the facial allodynia. Tac4 was detected in both TG neurons and satellite glial cells (SGC) by the ultrasensitive RNAscope in situ hybridization. We also compared gene expression changes of selected neuronal and glial sensitization and neuroinflammation markers between wild-type and Tac4-deficient (Tac4-/-) mice. Expression of the SGC/astrocyte marker in the TG and TNC was significantly lower in intact and saline/CFA-treated Tac4-/- mice. The procedural stress-related increase of the SGC/astrocyte marker was also strongly attenuated in Tac4-/- mice. Analysis of TG samples with a mouse neuroinflammation panel of 770 genes revealed that regulation of microglia and cytotoxic cell-related genes were significantly different in saline-treated Tac4-/- mice compared to their wild-types. It is concluded that HK-1 may participate in neuron-glia interactions both under physiological and inflammatory conditions and mediate pain in the trigeminal system.
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The Y chromosome may contribute to sex-specific ageing in Drosophila. Nat Ecol Evol 2020; 4:853-862. [PMID: 32313175 PMCID: PMC7274899 DOI: 10.1038/s41559-020-1179-5] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2019] [Accepted: 03/16/2020] [Indexed: 12/03/2022]
Abstract
Heterochromatin suppresses repetitive DNA, and a loss of heterochromatin has been observed in aged cells of several species, including humans and Drosophila. Males often contain substantially more heterochromatic DNA than females, due to the presence of a large, repeat-rich Y chromosome, and male flies generally have shorter average life spans than females. Here we show that repetitive DNA becomes de-repressed more rapidly in old male flies relative to females, and repeats on the Y chromosome are disproportionally mis-expressed during aging. This is associated with a loss of heterochromatin at repetitive elements during aging in male flies, and a general loss of repressive chromatin in aged males away from pericentromeric regions and the Y. By generating flies with different sex chromosome karyotypes (XXY females; X0 and XYY males), we show that repeat de-repression and average lifespan is correlated with the number of Y chromosomes. This suggests that sex-specific chromatin differences may contribute to sex-specific aging in flies.
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Role of the Nuclear Lamina in Age-Associated Nuclear Reorganization and Inflammation. Cells 2020; 9:cells9030718. [PMID: 32183360 PMCID: PMC7140666 DOI: 10.3390/cells9030718] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2020] [Revised: 03/11/2020] [Accepted: 03/12/2020] [Indexed: 02/06/2023] Open
Abstract
Aging is characterized by the gradual loss of tissue function and integrity. Activation of inflammatory responses accelerates the deterioration of cells and tissues. Many studies have shown that alteration of the components of the nuclear lamina is associated with inflammation, both in vivo and in vitro. However, the mechanism by which the nuclear lamina regulates inflammation is largely unknown. Recent studies have suggested that the nuclear lamina regulates both organization of the three-dimensional chromatin structure at the nuclear periphery and global gene expression, such as the expression of inflammatory response genes. Here, we discuss the current updates in the research on nuclear lamina alteration, activation of inflammation, and nuclear reorganization in models of cellular senescence and organismal aging.
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Fujihara Y, Abe T, Asawa Y, Nishizawa S, Saijo H, Hikita A, Hoshi K. Influence of Damage-Associated Molecular Patterns from Chondrocytes in Tissue-Engineered Cartilage. Tissue Eng Part A 2020; 27:1-9. [PMID: 31724485 DOI: 10.1089/ten.tea.2019.0185] [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] [Indexed: 01/17/2023] Open
Abstract
To obtain stable outcomes in regenerative medicine, the quality of cells for transplantation is of great importance. Cellular stress potentially results in the release of damage-associated molecular patterns (DAMPs) and activates immunological responses, affecting the outcome of transplanted tissue. In this study, we intentionally prepared necrotic chondrocytes that would gradually die and release DAMPs and investigated how the maturation of tissue-engineered cartilage was affected. Necrotic chondrocytes were prepared by a conventional heat-treatment method, by which their viability started to decrease after 24 h. When tissue-engineered cartilage containing necrotic chondrocytes was subcutaneously transplanted into C57BL/6J mice, accumulation of cartilage matrix was decreased compared to the control. Meanwhile, immunohistochemical staining demonstrated that localization of macrophages and neutrophils was more apparent in the constructs of necrotic chondrocytes, suggesting that DAMPs from necrotic chondrocytes could prompt migration of more immune cells. Two-dimensional electrophoresis and mass spectrometry identified prelamin as a significant biomolecule released from necrotic chondrocytes. Also, when prelamin was added to a culture of RAW264, Inos and Il1b were increased in accordance with the content of added prelamin. It was suggested that DAMPs from dying chondrocytes could induce inflammatory properties in surrounding macrophages, impairing the maturation of tissue-engineered cartilage. In conclusion, maturation of tissue-engineered cartilage was hampered when less viable chondrocytes releasing DAMPs were included. Impact statement In regenerative medicine, the quality of cells is of great importance to secure clinical safety. During culture, damage of cells could occur, if not critical enough to cause immediate cell death, but still inducing a less viable status. Damage-associated molecular patterns (DAMPs) are released from necrotic cells, but their influence in regenerative medicine has yet to be clarified. In this study, we elucidated how DAMPs from chondrocytes could affect the maturation of tissue-engineered cartilage. Also, possible DAMPs from necrotic chondrocytes were comprehensively analyzed, and prelamin was identified as a significant molecule, which may serve for detecting the existence of necrotic chondrocytes.
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Affiliation(s)
- Yuko Fujihara
- Department of Oral-Maxillofacial Surgery and Orthodontics, The University of Tokyo Hospital, Tokyo, Japan
| | - Takahiro Abe
- Department of Oral-Maxillofacial Surgery and Orthodontics, The University of Tokyo Hospital, Tokyo, Japan
| | - Yukiyo Asawa
- Department of Cartilage and Bone Regeneration (Fujisoft), Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Satoru Nishizawa
- Department of Cartilage and Bone Regeneration (Fujisoft), Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Hideto Saijo
- Department of Oral-Maxillofacial Surgery and Orthodontics, The University of Tokyo Hospital, Tokyo, Japan
| | - Atsuhiko Hikita
- Department of Cartilage and Bone Regeneration (Fujisoft), Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Kazuto Hoshi
- Department of Oral-Maxillofacial Surgery and Orthodontics, The University of Tokyo Hospital, Tokyo, Japan.,Division of Tissue Engineering, The University of Tokyo Hospital, Tokyo, Japan
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27
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Yue S, Zheng X, Zheng Y. Cell-type-specific role of lamin-B1 in thymus development and its inflammation-driven reduction in thymus aging. Aging Cell 2019; 18:e12952. [PMID: 30968547 PMCID: PMC6612680 DOI: 10.1111/acel.12952] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2018] [Revised: 02/21/2019] [Accepted: 03/01/2019] [Indexed: 12/31/2022] Open
Abstract
Cellular architectural proteins often participate in organ development and maintenance. Although functional decay of some of these proteins during aging is known, the cell-type-specific developmental role and the cause and consequence of their subsequent decay remain to be established especially in mammals. By studying lamins, the nuclear structural proteins, we demonstrate that lamin-B1 functions specifically in the thymic epithelial cells (TECs) for proper thymus organogenesis. An up-regulation of proinflammatory cytokines in the intra-thymic myeloid immune cells during aging accompanies a gradual reduction of lamin-B1 in adult TECs. We show that these cytokines can cause senescence and lamin-B1 reduction of the young adult TECs. Lamin-B1 supports the expression of TEC genes that can help maintain the adult TEC subtypes we identified by single-cell RNA-sequencing, thymic architecture, and function. Thus, structural proteins involved in organ building and maintenance can undergo inflammation-driven decay which can in turn contribute to age-associated organ degeneration.
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Affiliation(s)
- Sibiao Yue
- Department of EmbryologyCarnegie Institution for ScienceBaltimoreMaryland
- Department of BiologyJohns Hopkins UniversityBaltimoreMaryland
| | - Xiaobin Zheng
- Department of BiologyJohns Hopkins UniversityBaltimoreMaryland
| | - Yixian Zheng
- Department of EmbryologyCarnegie Institution for ScienceBaltimoreMaryland
- Department of BiologyJohns Hopkins UniversityBaltimoreMaryland
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28
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Bouska M, Huang K, Kang P, Bai H. Organelle aging: Lessons from model organisms. J Genet Genomics 2019; 46:171-185. [PMID: 31080045 PMCID: PMC6553499 DOI: 10.1016/j.jgg.2019.03.011] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2018] [Revised: 02/22/2019] [Accepted: 03/12/2019] [Indexed: 01/07/2023]
Abstract
Most cellular processes descend into failure during aging. While a large collection of longevity pathways has been identified in the past decades, the mechanism for age-related decline of cellular homeostasis and organelle function remains largely unsolved. It is known that many organelles undergo structural and functional changes during normal aging, which significantly contributes to the decline of tissue function at old ages. Since recent studies have revealed an emerging role of organelles as regulatory hubs in maintaining cellular homeostasis, understanding of organelle aging will provide important insights into the cellular basis of organismal aging. Here we review current progress on the characterization of age-dependent structural and functional alterations in the more well-studied organelles, as well as the known mechanisms governing organelle aging in model organisms, with a special focus on the fruit fly Drosophila melanogaster.
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Affiliation(s)
- Mark Bouska
- Department of Genetics, Development, and Cell Biology, Iowa State University, Ames, IA, 50011, USA
| | - Kerui Huang
- Department of Genetics, Development, and Cell Biology, Iowa State University, Ames, IA, 50011, USA
| | - Ping Kang
- Department of Genetics, Development, and Cell Biology, Iowa State University, Ames, IA, 50011, USA
| | - Hua Bai
- Department of Genetics, Development, and Cell Biology, Iowa State University, Ames, IA, 50011, USA.
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29
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Dubińska-Magiera M, Kozioł K, Machowska M, Piekarowicz K, Filipczak D, Rzepecki R. Emerin Is Required for Proper Nucleus Reassembly after Mitosis: Implications for New Pathogenetic Mechanisms for Laminopathies Detected in EDMD1 Patients. Cells 2019; 8:cells8030240. [PMID: 30871242 PMCID: PMC6468536 DOI: 10.3390/cells8030240] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2019] [Revised: 02/26/2019] [Accepted: 03/05/2019] [Indexed: 12/29/2022] Open
Abstract
Emerin is an essential LEM (LAP2, Emerin, MAN1) domain protein in metazoans and an integral membrane protein associated with inner and outer nuclear membranes. Mutations in the human EMD gene coding for emerin result in the rare genetic disorder: Emery–Dreifuss muscular dystrophy type 1 (EDMD1). This disease belongs to a broader group called laminopathies—a heterogeneous group of rare genetic disorders affecting tissues of mesodermal origin. EDMD1 phenotype is characterized by progressive muscle wasting, contractures of the elbow and Achilles tendons, and cardiac conduction defects. Emerin is involved in many cellular and intranuclear processes through interactions with several partners: lamins; barrier-to-autointegration factor (BAF), β-catenin, actin, and tubulin. Our study demonstrates the presence of the emerin fraction which associates with mitotic spindle microtubules and centrosomes during mitosis and colocalizes during early mitosis with lamin A/C, BAF, and membranes at the mitotic spindle. Transfection studies with cells expressing EGFP-emerin protein demonstrate that the emerin fusion protein fraction also localizes to centrosomes and mitotic spindle microtubules during mitosis. Transient expression of emerin deletion mutants revealed that the resulting phenotypes vary and are mutant dependent. The most frequent phenotypes include aberrant nuclear shape, tubulin network mislocalization, aberrant mitosis, and mislocalization of centrosomes. Emerin deletion mutants demonstrated different chromatin binding capacities in an in vitro nuclear assembly assay and chromatin-binding properties correlated with the strength of phenotypic alteration in transfected cells. Aberrant tubulin staining and microtubule network phenotype appearance depended on the presence of the tubulin binding region in the expressed deletion mutants. We believe that the association with tubulin might help to “deliver” emerin and associated membranes to decondensing chromatin. Preliminary analyses of cells from Polish patients with EDMD1 revealed that for several mutations thought to be null for emerin protein, a truncated emerin protein was present. We infer that the EDMD1 phenotype may be strengthened by the toxicity of truncated emerin expressed in patients with certain nonsense mutations in EMD.
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Affiliation(s)
- Magda Dubińska-Magiera
- Laboratory of Nuclear Proteins, Faculty of Biotechnology, University of Wroclaw, Fryderyka Joliot-Curie 14a, 50-383 Wroclaw, Poland.
- Department of Animal Developmental Biology, Institute of Experimental Biology, University of Wroclaw, Sienkiewicza 21, 50-335 Wroclaw, Poland.
| | - Katarzyna Kozioł
- Laboratory of Nuclear Proteins, Faculty of Biotechnology, University of Wroclaw, Fryderyka Joliot-Curie 14a, 50-383 Wroclaw, Poland.
| | - Magdalena Machowska
- Laboratory of Nuclear Proteins, Faculty of Biotechnology, University of Wroclaw, Fryderyka Joliot-Curie 14a, 50-383 Wroclaw, Poland.
| | - Katarzyna Piekarowicz
- Laboratory of Nuclear Proteins, Faculty of Biotechnology, University of Wroclaw, Fryderyka Joliot-Curie 14a, 50-383 Wroclaw, Poland.
| | - Daria Filipczak
- Laboratory of Nuclear Proteins, Faculty of Biotechnology, University of Wroclaw, Fryderyka Joliot-Curie 14a, 50-383 Wroclaw, Poland.
| | - Ryszard Rzepecki
- Laboratory of Nuclear Proteins, Faculty of Biotechnology, University of Wroclaw, Fryderyka Joliot-Curie 14a, 50-383 Wroclaw, Poland.
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Abstract
The insect fat body is analogous to vertebrate adipose tissue and liver. In this review, the new and exciting advancements made in fat body biology in the last decade are summarized. Controlled by hormonal and nutritional signals, insect fat body cells undergo mitosis during embryogenesis, endoreplication during the larval stages, and remodeling during metamorphosis and regulate reproduction in adults. Fat body tissues are major sites for nutrient storage, energy metabolism, innate immunity, and detoxification. Recent studies have revealed that the fat body plays a central role in the integration of hormonal and nutritional signals to regulate larval growth, body size, circadian clock, pupal diapause, longevity, feeding behavior, and courtship behavior, partially by releasing fat body signals to remotely control the brain. In addition, the fat body has emerged as a fascinating model for studying metabolic disorders and immune diseases. Potential future directions for fat body biology are also proposed herein.
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Affiliation(s)
- Sheng Li
- Guangzhou Key Laboratory of Insect Development Regulation and Application Research, Institute of Insect Science and Technology, School of Life Sciences, South China Normal University, Guangzhou, Guangdong 510631, China; , ,
| | - Xiaoqiang Yu
- Guangzhou Key Laboratory of Insect Development Regulation and Application Research, Institute of Insect Science and Technology, School of Life Sciences, South China Normal University, Guangzhou, Guangdong 510631, China; , ,
| | - Qili Feng
- Guangzhou Key Laboratory of Insect Development Regulation and Application Research, Institute of Insect Science and Technology, School of Life Sciences, South China Normal University, Guangzhou, Guangdong 510631, China; , ,
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31
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Manley HR, Keightley MC, Lieschke GJ. The Neutrophil Nucleus: An Important Influence on Neutrophil Migration and Function. Front Immunol 2018; 9:2867. [PMID: 30564248 PMCID: PMC6288403 DOI: 10.3389/fimmu.2018.02867] [Citation(s) in RCA: 67] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2018] [Accepted: 11/21/2018] [Indexed: 11/13/2022] Open
Abstract
Neutrophil nuclear morphology has historically been used in haematology for neutrophil identification and characterisation, but its exact role in neutrophil function has remained enigmatic. During maturation, segmentation of the neutrophil nucleus into its mature, multi-lobulated shape is accompanied by distinct changes in nuclear envelope composition, resulting in a unique nucleus that is believed to be imbued with extraordinary nuclear flexibility. As a rate-limiting factor for cell migration, nuclear morphology and biomechanics are particularly important in the context of neutrophil migration during immune responses. Being an extremely plastic and fast migrating cell type, it is to be expected that neutrophils have an especially deformable nucleus. However, many questions still surround the dynamic capacities of the neutrophil nucleus, and which nuclear and cytoskeletal elements determine these dynamics. The biomechanics of the neutrophil nucleus should also be considered for their influences on the production of neutrophil extracellular traps (NETs), given this process sees the release of chromatin "nets" from nucleoplasm to extracellular space. Although past studies have investigated neutrophil nuclear composition and shape, in a new era of more sophisticated biomechanical and genetic techniques, 3D migration studies, and higher resolution microscopy we now have the ability to further investigate and understand neutrophil nuclear plasticity at an unprecedented level. This review addresses what is currently understood about neutrophil nuclear structure and its role in migration and the release of NETs, whilst highlighting open questions surrounding neutrophil nuclear dynamics.
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Affiliation(s)
- Harriet R Manley
- Australian Regenerative Medicine Institute, Monash University, Clayton, VIC, Australia
| | | | - Graham J Lieschke
- Australian Regenerative Medicine Institute, Monash University, Clayton, VIC, Australia
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32
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Jiang Y, Ji JY. Understanding lamin proteins and their roles in aging and cardiovascular diseases. Life Sci 2018; 212:20-29. [DOI: 10.1016/j.lfs.2018.09.026] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2018] [Revised: 09/12/2018] [Accepted: 09/14/2018] [Indexed: 02/04/2023]
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33
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Oyston LJ, Lin YQ, Khuong TM, Wang QP, Lau MT, Clark T, Neely GG. Neuronal Lamin regulates motor circuit integrity and controls motor function and lifespan. Cell Stress 2018; 2:225-232. [PMID: 31225490 PMCID: PMC6558924 DOI: 10.15698/cst2018.09.152] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
Neuronal aging involves a progressive decline in cognitive abilities and loss of motor function. Mutations in human Lamin genes (LMNA, LMNB1, LMNB2) lead to a wide-range of diseases including muscular dystrophy, peripheral neuropathy and progeria. Here we investigate the role of neuronal Lamin in regulating age-related phenotypes. Neuronal targeting of Lamin led to shortened lifespan, progressive impairment of motor function and loss of dopaminergic (DA) neurons within the protocerebral anterior medial (PAM) cluster in the Drosophilamelanogaster brain. Loss of neuronal Lamin caused an age-related decline in neural physiology, with slower neurotransmission and increased chance of motor circuit failure with age. Unexpectedly, Lamin-dependent decline in motor function was specific for the chemical synapses of the dorsal longitudinal muscle (DLM). Together these findings highlight a central role for Lamin dysfunction in regulating neuronal survival and motor circuit physiology during aging.
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Affiliation(s)
- Lisa J Oyston
- The Dr. John and Anne Chong Lab for Functional Genomics, Charles Perkins Centre and School of Life and Environmental Sciences, The University of Sydney NSW 2006, Australia.,Neuroscience Division, Garvan Institute of Medical Research, 384 Victoria Street, Darlinghurst, Sydney, NSW 2010, Australia.,St Vincent's Clinical School, Faculty of Medicine, UNSW Sydney NSW 2052, Australia
| | - Yong Qi Lin
- The Dr. John and Anne Chong Lab for Functional Genomics, Charles Perkins Centre and School of Life and Environmental Sciences, The University of Sydney NSW 2006, Australia
| | - Thang M Khuong
- The Dr. John and Anne Chong Lab for Functional Genomics, Charles Perkins Centre and School of Life and Environmental Sciences, The University of Sydney NSW 2006, Australia
| | - Qiao-Ping Wang
- The Dr. John and Anne Chong Lab for Functional Genomics, Charles Perkins Centre and School of Life and Environmental Sciences, The University of Sydney NSW 2006, Australia
| | - Man Tat Lau
- The Dr. John and Anne Chong Lab for Functional Genomics, Charles Perkins Centre and School of Life and Environmental Sciences, The University of Sydney NSW 2006, Australia
| | - Teleri Clark
- The Dr. John and Anne Chong Lab for Functional Genomics, Charles Perkins Centre and School of Life and Environmental Sciences, The University of Sydney NSW 2006, Australia
| | - G Gregory Neely
- The Dr. John and Anne Chong Lab for Functional Genomics, Charles Perkins Centre and School of Life and Environmental Sciences, The University of Sydney NSW 2006, Australia
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34
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Yadav SK, Feigelson SW, Roncato F, Antman-Passig M, Shefi O, Lammerding J, Alon R. Frontline Science: Elevated nuclear lamin A is permissive for granulocyte transendothelial migration but not for motility through collagen I barriers. J Leukoc Biol 2018; 104:239-251. [PMID: 29601096 DOI: 10.1002/jlb.3hi1217-488r] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2017] [Revised: 02/15/2018] [Accepted: 02/16/2018] [Indexed: 01/21/2023] Open
Abstract
Transendothelial migration (TEM) of lymphocytes and neutrophils is associated with the ability of their deformable nuclei to displace endothelial cytoskeletal barriers. Lamin A is a key intermediate filament component of the nuclear lamina that is downregulated during granulopoiesis. When elevated, lamin A restricts nuclear squeezing through rigid confinements. To determine if the low lamin A expression by leukocyte nuclei is critical for their exceptional squeezing ability through endothelial barriers, we overexpressed this protein in granulocyte-like differentiated HL-60 cells. A 10-fold higher lamin A expression did not interfere with chemokinetic motility of these granulocytes on immobilized CXCL1. Furthermore, these lamin A high leukocytes exhibited normal chemotaxis toward CXCL1 determined in large pore transwell barriers, but poorly squeezed through 3 μm pores toward identical CXCL1 gradients. Strikingly, however, these leukocytes successfully completed paracellular TEM across inflamed endothelial monolayers under shear flow, albeit with a small delay in nuclear squeezing into their sub-endothelial pseudopodia. In contrast, CXCR2 mediated granulocyte motility through collagen I barriers was dramatically delayed by lamin A overexpression due to a failure of lamin A high nuclei to translocate into the pseudopodia of the granulocytes. Collectively, our data predict that leukocytes maintain a low lamin A content in their nuclear lamina in order to optimize squeezing through extracellular collagen barriers but can tolerate high lamin A content when crossing the highly adaptable barriers presented by the endothelial cytoskeleton.
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Affiliation(s)
- Sandeep Kumar Yadav
- Department of Immunology, The Weizmann Institute of Science, Rehovot, Israel
| | - Sara W Feigelson
- Department of Immunology, The Weizmann Institute of Science, Rehovot, Israel
| | - Francesco Roncato
- Department of Immunology, The Weizmann Institute of Science, Rehovot, Israel
| | - Merav Antman-Passig
- Faculty of Engineering, Bar Ilan Institute of Nanotechnologies and Advanced Materials, Bar Ilan University, Ramat Gan, Israel
| | - Orit Shefi
- Faculty of Engineering, Bar Ilan Institute of Nanotechnologies and Advanced Materials, Bar Ilan University, Ramat Gan, Israel
| | - Jan Lammerding
- Nancy E. and Peter C. Meinig School of Biomedical Engineering, Weill Institute for Cell and Molecular Biology, Cornell University, Ithaca, New York, USA
| | - Ronen Alon
- Department of Immunology, The Weizmann Institute of Science, Rehovot, Israel
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35
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Feng G, Zheng K, Cao T, Zhang J, Lian M, Huang D, Wei C, Gu Z, Feng X. Repeated stimulation by LPS promotes the senescence of DPSCs via TLR4/MyD88-NF-κB-p53/p21 signaling. Cytotechnology 2018; 70:1023-1035. [PMID: 29480340 DOI: 10.1007/s10616-017-0180-6] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2017] [Accepted: 12/02/2017] [Indexed: 01/13/2023] Open
Abstract
Dental pulp stem cells (DPSCs), one type of mesenchymal stem cells, are considered to be a type of tool cells for regenerative medicine and tissue engineering. Our previous studies found that the stimulation with lipopolysaccharide (LPS) might introduce senescence of DPSCs, and this senescence would have a positive correlation with the concentration of LPS. The β-galactosidase (SA-β-gal) staining was used to evaluate the senescence of DPSCs and immunofluorescence to show the morphology of DPSCs. Our findings suggested that the activity of SA-β-gal has increased after repeated stimulation with LPS and the morphology of DPSCs has changed with the stimulation with LPS. We also found that LPS bound to the Toll-like receptor 4 (TLR4)/myeloid differentiation factor (MyD) 88 signaling pathway. Protein and mRNA expression of TLR4, MyD88 were enhanced in DPSCs with LPS stimulation, resulting in the activation of nuclear factor-κB (NF-κB) signaling, which exhibited the expression of p65 improved in the nucleus while the decreasing of IκB-α. Simultaneously, the expression of p53 and p21, the downstream proteins of the NF-κB signaling, has increased. In summary, DPSCs tend to undergo senescence after repeated stimulation in an inflammatory microenvironment. Ultimately, these findings may lead to a new direction for cell-based therapy in oral diseases and other regenerative medicines.
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Affiliation(s)
- Guijuan Feng
- Department of Stomatology, Affiliated Hospital of Nantong University, Nantong, 226001, China
| | - Ke Zheng
- Department of Stomatology, Wuxi No.2 People's Hospital, Wuxi, 214000, China
| | - Tong Cao
- Department of Provost's Office, Affiliated Hospital of Nantong University, Nantong, 226001, China
| | - Jinlong Zhang
- Department of Spine Surgery, The Second Affiliated Hospital of Nantong University, Nantong, 226001, China
| | - Min Lian
- Department of Stomatology, Affiliated Hospital of Nantong University, Nantong, 226001, China
| | - Dan Huang
- Department of Stomatology, Affiliated Hospital of Nantong University, Nantong, 226001, China
| | - Changbo Wei
- Guanghua School of Stomatology, Hospital of Stomatology, Sun Yat-sen University, Guangzhou, 510055, China
| | - Zhifeng Gu
- Department of Rheumatology, Affiliated Hospital of Nantong University, Nantong, 226001, China.
| | - Xingmei Feng
- Department of Stomatology, Affiliated Hospital of Nantong University, Nantong, 226001, China.
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36
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Silva VRR, Katashima CK, Bueno Silva CG, Lenhare L, Micheletti TO, Camargo RL, Ghezzi AC, Camargo JA, Assis AM, Tobar N, Morari J, Razolli DS, Moura LP, Pauli JR, Cintra DE, Velloso LA, Saad MJA, Ropelle ER. Hypothalamic S1P/S1PR1 axis controls energy homeostasis in Middle-Aged Rodents: the reversal effects of physical exercise. Aging (Albany NY) 2017; 9:142-155. [PMID: 28039439 PMCID: PMC5310661 DOI: 10.18632/aging.101138] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2016] [Accepted: 11/29/2016] [Indexed: 02/06/2023]
Abstract
Recently, we demonstrated that the hypothalamic S1PR1/STAT3 axis plays a critical role in the control of food consumption and energy expenditure in rodents. Here, we found that reduction of hypothalamic S1PR1 expression occurs in an age-dependent manner, and was associated with defective thermogenic signaling and weight gain. To address the physiological relevance of these findings, we investigated the effects of chronic and acute exercise on the hypothalamic S1PR1/STAT3 axis. Chronic exercise increased S1PR1 expression and STAT3 phosphorylation in the hypothalamus, restoring the anorexigenic and thermogenic signals in middle-aged mice. Acutely, exercise increased sphingosine-1-phosphate (S1P) levels in the cerebrospinal fluid (CSF) of young rats, whereas the administration of CSF from exercised young rats into the hypothalamus of middle-aged rats at rest was sufficient to reduce the food intake. Finally, the intracerebroventricular (ICV) administration of S1PR1 activators, including the bioactive lipid molecule S1P, and pharmacological S1PR1 activator, SEW2871, induced a potent STAT3 phosphorylation and anorexigenic response in middle-aged rats. Overall, these results suggest that hypothalamic S1PR1 is important for the maintenance of energy balance and provide new insights into the mechanism by which exercise controls the anorexigenic and thermogenic signals in the central nervous system during the aging process.
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Affiliation(s)
- Vagner Ramon Rodrigues Silva
- School of Applied Sciences, University of Campinas, Limeira, SP, Brazil.,Department of Internal Medicine, University of Campinas, Campinas, SP, Brazil
| | | | - Carla G Bueno Silva
- Department of Internal Medicine, University of Campinas, Campinas, SP, Brazil
| | - Luciene Lenhare
- Department of Internal Medicine, University of Campinas, Campinas, SP, Brazil
| | | | | | - Ana Carolina Ghezzi
- Department of Internal Medicine, University of Campinas, Campinas, SP, Brazil
| | | | | | - Natalia Tobar
- Department of Internal Medicine, University of Campinas, Campinas, SP, Brazil
| | - Joseane Morari
- Department of Internal Medicine, University of Campinas, Campinas, SP, Brazil
| | - Daniela S Razolli
- Department of Internal Medicine, University of Campinas, Campinas, SP, Brazil
| | | | - José Rodrigo Pauli
- School of Applied Sciences, University of Campinas, Limeira, SP, Brazil.,Department of Internal Medicine, University of Campinas, Campinas, SP, Brazil.,CEPECE - Research Center of Sport Sciences, School of Applied Sciences, University of Campinas, Limeira, SP, Brazil
| | | | - Lício Augusto Velloso
- Department of Internal Medicine, University of Campinas, Campinas, SP, Brazil.,Laboratory of Cell Signaling, Obesity and Comorbidities Research Center, University of Campinas, Campinas, 1308-970, Brazil
| | - Mario J A Saad
- Department of Internal Medicine, University of Campinas, Campinas, SP, Brazil
| | - Eduardo Rochete Ropelle
- School of Applied Sciences, University of Campinas, Limeira, SP, Brazil.,Department of Internal Medicine, University of Campinas, Campinas, SP, Brazil.,CEPECE - Research Center of Sport Sciences, School of Applied Sciences, University of Campinas, Limeira, SP, Brazil.,Laboratory of Cell Signaling, Obesity and Comorbidities Research Center, University of Campinas, Campinas, 1308-970, Brazil
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37
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Duan DD, Wang KX, Zhou YZ, Qin XM, Gao L, Du GH. Baicalein Exerts Beneficial Effects in d-Galactose-Induced Aging Rats Through Attenuation of Inflammation and Metabolic Dysfunction. Rejuvenation Res 2017; 20:506-516. [PMID: 28548620 DOI: 10.1089/rej.2017.1919] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Baicalein is a flavonoid isolated from the roots of Scutellaria baicalensis Georgi. This study aimed to ascertain the effects and potential underlying mechanisms of baicalein in d-galactose (d-gal)-induced aging rat model by integration of behavior examination, biochemical detection, and 1H nuclear magnetic resonance (NMR)-based metabolomic approach. Our findings suggest that baicalein significantly attenuated memory decline in d-gal-induced aging model, as manifested by increasing recognition index in novel object recognition test, shortening latency time, and increasing platform crossings in Morris water maze test. Baicalein significantly inhibited the releases of inflammatory mediators such as nitric oxide, interleukin-6, interleukin-1 beta, and tumor necrosis factor-α in d-gal-induced aging model. Metabolomic study revealed that 10 endogenous metabolites in cerebral cortex were considered as potential biomarkers of baicalein for its protective effect. Further metabolic pathway analysis showed that the metabolic alterations were associated with alanine, aspartate and glutamate metabolism, glycine, serine and threonine metabolism, inositol phosphate metabolism, and energy metabolism. These data indicate that baicalein improves learning and memory dysfunction in d-gal-induced aging rats. This might be achieved through attenuation of inflammation and metabolic dysfunction.
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Affiliation(s)
- Dan-Dan Duan
- 1 Modern Research Center for Traditional Chinese Medicine, Shanxi University , Taiyuan, PR China .,2 College of Chemistry and Chemical Engineering, Shanxi University , Taiyuan, PR China
| | - Ke-Xin Wang
- 1 Modern Research Center for Traditional Chinese Medicine, Shanxi University , Taiyuan, PR China .,2 College of Chemistry and Chemical Engineering, Shanxi University , Taiyuan, PR China
| | - Yu-Zhi Zhou
- 1 Modern Research Center for Traditional Chinese Medicine, Shanxi University , Taiyuan, PR China
| | - Xue-Mei Qin
- 1 Modern Research Center for Traditional Chinese Medicine, Shanxi University , Taiyuan, PR China
| | - Li Gao
- 1 Modern Research Center for Traditional Chinese Medicine, Shanxi University , Taiyuan, PR China
| | - Guan-Hua Du
- 1 Modern Research Center for Traditional Chinese Medicine, Shanxi University , Taiyuan, PR China .,3 Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College , Beijing, PR China
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Serebryannyy L, Misteli T. Protein sequestration at the nuclear periphery as a potential regulatory mechanism in premature aging. J Cell Biol 2017; 217:21-37. [PMID: 29051264 PMCID: PMC5748986 DOI: 10.1083/jcb.201706061] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2017] [Revised: 08/10/2017] [Accepted: 08/17/2017] [Indexed: 12/19/2022] Open
Abstract
Serebryannyy and Misteli provide a perspective on how protein sequestration at the inner nuclear membrane and nuclear lamina might influence aging. Despite the extensive description of numerous molecular changes associated with aging, insights into the driver mechanisms of this fundamental biological process are limited. Based on observations in the premature aging syndrome Hutchinson–Gilford progeria, we explore the possibility that protein regulation at the inner nuclear membrane and the nuclear lamina contributes to the aging process. In support, sequestration of nucleoplasmic proteins to the periphery impacts cell stemness, the response to cytotoxicity, proliferation, changes in chromatin state, and telomere stability. These observations point to the nuclear periphery as a central regulator of the aging phenotype.
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Affiliation(s)
| | - Tom Misteli
- National Cancer Institute, National Institutes of Health, Bethesda, MD
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Ha SH, Kim HK, Anh NTT, Kim N, Ko KS, Rhee BD, Han J. Time-dependent proteomic and genomic alterations in Toll-like receptor-4-activated human chondrocytes: increased expression of lamin A/C and annexins. THE KOREAN JOURNAL OF PHYSIOLOGY & PHARMACOLOGY : OFFICIAL JOURNAL OF THE KOREAN PHYSIOLOGICAL SOCIETY AND THE KOREAN SOCIETY OF PHARMACOLOGY 2017; 21:531-546. [PMID: 28883757 PMCID: PMC5587603 DOI: 10.4196/kjpp.2017.21.5.531] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/10/2017] [Revised: 05/04/2017] [Accepted: 05/10/2017] [Indexed: 12/25/2022]
Abstract
Activation of Toll-like receptor-4 (TLR-4) in articular chondrocytes increases the catabolic compartment and leads to matrix degradation during the development of osteoarthritis. In this study, we determined the proteomic and genomic alterations in human chondrocytes during lipopolysaccharide (LPS)-induced inflammation to elucidate the underlying mechanisms and consequences of TLR-4 activation. Human chondrocytes were cultured with LPS for 12, 24, and 36 h to induce TLR-4 activation. The TLR-4-induced inflammatory response was confirmed by real-time PCR analysis of increased interleukin-1 beta (IL-1β), interleukin-6 (IL-6), and tumor necrosis factor alpha (TNF-α) expression levels. In TLR-4-activated chondrocytes, proteomic changes were determined by two-dimensional electrophoresis and matrix-assisted laser desorption/ionization-mass spectroscopy analysis, and genomic changes were determined by microarray and gene ontology analyses. Proteomics analysis identified 26 proteins with significantly altered expression levels; these proteins were related to the cytoskeleton and oxidative stress responses. Gene ontology analysis indicated that LPS treatment altered specific functional pathways including ‘chemotaxis’, ‘hematopoietic organ development’, ‘positive regulation of cell proliferation’, and ‘regulation of cytokine biosynthetic process’. Nine of the 26 identified proteins displayed the same increased expression patterns in both proteomics and genomics analyses. Western blot analysis confirmed the LPS-induced increases in expression levels of lamin A/C and annexins 4/5/6. In conclusion, this study identified the time-dependent genomic, proteomic, and functional pathway alterations that occur in chondrocytes during LPS-induced TLR-4 activation. These results provide valuable new insights into the underlying mechanisms that control the development and progression of osteoarthritis.
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Affiliation(s)
- Seung Hee Ha
- National Research Laboratory for Mitochondrial Signaling, Department of Physiology, Department of Health Sciences and Technology, BK21 Plus Project Team, College of Medicine, Cardiovascular and Metabolic Disease Center, Inje University, Busan 47392, Korea.,Department of Health Technology Development, Health Project Management Team, Korea Health Industry Development Institute (KHIDI), Cheongju 28159, Korea
| | - Hyoung Kyu Kim
- National Research Laboratory for Mitochondrial Signaling, Department of Physiology, Department of Health Sciences and Technology, BK21 Plus Project Team, College of Medicine, Cardiovascular and Metabolic Disease Center, Inje University, Busan 47392, Korea
| | - Nguyen Thi Tuyet Anh
- National Research Laboratory for Mitochondrial Signaling, Department of Physiology, Department of Health Sciences and Technology, BK21 Plus Project Team, College of Medicine, Cardiovascular and Metabolic Disease Center, Inje University, Busan 47392, Korea
| | - Nari Kim
- National Research Laboratory for Mitochondrial Signaling, Department of Physiology, Department of Health Sciences and Technology, BK21 Plus Project Team, College of Medicine, Cardiovascular and Metabolic Disease Center, Inje University, Busan 47392, Korea
| | - Kyung Soo Ko
- National Research Laboratory for Mitochondrial Signaling, Department of Physiology, Department of Health Sciences and Technology, BK21 Plus Project Team, College of Medicine, Cardiovascular and Metabolic Disease Center, Inje University, Busan 47392, Korea
| | - Byoung Doo Rhee
- National Research Laboratory for Mitochondrial Signaling, Department of Physiology, Department of Health Sciences and Technology, BK21 Plus Project Team, College of Medicine, Cardiovascular and Metabolic Disease Center, Inje University, Busan 47392, Korea
| | - Jin Han
- National Research Laboratory for Mitochondrial Signaling, Department of Physiology, Department of Health Sciences and Technology, BK21 Plus Project Team, College of Medicine, Cardiovascular and Metabolic Disease Center, Inje University, Busan 47392, Korea
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Tran JR, Zheng X, Zheng Y. Lamin-B1 contributes to the proper timing of epicardial cell migration and function during embryonic heart development. Mol Biol Cell 2016; 27:3956-3963. [PMID: 27798236 PMCID: PMC5156536 DOI: 10.1091/mbc.e16-06-0462] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2016] [Revised: 10/11/2016] [Accepted: 10/12/2016] [Indexed: 11/11/2022] Open
Abstract
Lamin proteins form a meshwork beneath the nuclear envelope and contribute to many different cellular processes. Mutations in lamins cause defective organogenesis in mouse models and human diseases that affect adipose tissue, brain, skeletal muscle, and the heart. In vitro cell culture studies have shown that lamins help maintain nuclear shape and facilitate cell migration. However, whether these defects contribute to improper tissue building in vivo requires further clarification. By studying the heart epicardium during embryogenesis, we show that Lb1-null epicardial cells exhibit in vivo and in vitro migratory delay. Transcriptome analyses of these cells suggest that Lb1 influences the expression of cell adhesion genes, which could affect cell migration during epicardium development. These epicardial defects are consistent with incomplete development of both vascular smooth muscle and compact myocardium at later developmental stages in Lb1-null embryos. Further, we found that Lb1-null epicardial cells have a delayed nuclear morphology change in vivo, suggesting that Lb1 facilitates morphological changes associated with migration. These findings suggest that Lb1 contributes to nuclear shape maintenance and migration of epicardial cells and highlights the use of these cells for in vitro and in vivo study of these classic cell biological phenomena.
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Affiliation(s)
- Joseph R Tran
- Department of Embryology, Carnegie Institution for Science, Baltimore, MD 21218
| | - Xiaobin Zheng
- Department of Embryology, Carnegie Institution for Science, Baltimore, MD 21218
| | - Yixian Zheng
- Department of Embryology, Carnegie Institution for Science, Baltimore, MD 21218
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