1
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Attar AG, Paturej J, Banigan EJ, Erbaş A. Chromatin phase separation and nuclear shape fluctuations are correlated in a polymer model of the nucleus. Nucleus 2024; 15:2351957. [PMID: 38753956 PMCID: PMC11407394 DOI: 10.1080/19491034.2024.2351957] [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: 01/30/2024] [Revised: 04/22/2024] [Accepted: 04/28/2024] [Indexed: 05/18/2024] Open
Abstract
Abnormal cell nuclear shapes are hallmarks of diseases, including progeria, muscular dystrophy, and many cancers. Experiments have shown that disruption of heterochromatin and increases in euchromatin lead to nuclear deformations, such as blebs and ruptures. However, the physical mechanisms through which chromatin governs nuclear shape are poorly understood. To investigate how heterochromatin and euchromatin might govern nuclear morphology, we studied chromatin microphase separation in a composite coarse-grained polymer and elastic shell simulation model. By varying chromatin density, heterochromatin composition, and heterochromatin-lamina interactions, we show how the chromatin phase organization may perturb nuclear shape. Increasing chromatin density stabilizes the lamina against large fluctuations. However, increasing heterochromatin levels or heterochromatin-lamina interactions enhances nuclear shape fluctuations by a "wetting"-like interaction. In contrast, fluctuations are insensitive to heterochromatin's internal structure. Our simulations suggest that peripheral heterochromatin accumulation could perturb nuclear morphology, while nuclear shape stabilization likely occurs through mechanisms other than chromatin microphase organization.
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Affiliation(s)
- Ali Goktug Attar
- UNAM-National Nanotechnology Research Center and Institute of Materials Science & Nanotechnology, Bilkent University, Ankara, Turkey
| | | | - Edward J Banigan
- Institute for Medical Engineering and Science and Department of Physics, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Aykut Erbaş
- UNAM-National Nanotechnology Research Center and Institute of Materials Science & Nanotechnology, Bilkent University, Ankara, Turkey
- Institute of Physics, University of Silesia, Chorzów, Poland
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2
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Kono Y, Shimi T. Crosstalk between mitotic reassembly and repair of the nuclear envelope. Nucleus 2024; 15:2352203. [PMID: 38780365 PMCID: PMC11123513 DOI: 10.1080/19491034.2024.2352203] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2023] [Accepted: 05/01/2024] [Indexed: 05/25/2024] Open
Abstract
In eukaryotic cells, the nuclear envelope (NE) is a membrane partition between the nucleus and the cytoplasm to compartmentalize nuclear contents. It plays an important role in facilitating nuclear functions including transcription, DNA replication and repair. In mammalian cells, the NE breaks down and then reforms during cell division, and in interphase it is restored shortly after the NE rupture induced by mechanical force. In this way, the partitioning effect is regulated through dynamic processes throughout the cell cycle. A failure in rebuilding the NE structure triggers the mixing of nuclear and cytoplasmic contents, leading to catastrophic consequences for the nuclear functions. Whereas the precise details of molecular mechanisms for NE reformation during cell division and NE restoration in interphase are still being investigated, here, we mostly focus on mammalian cells to describe key aspects that have been identified and to discuss the crosstalk between them.
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Affiliation(s)
- Yohei Kono
- Nano Life Science Institute (WPI-NanoLSI), Kanazawa University, Kanazawa, Japan
- Cell Biology Center, Institute of Innovative Research, Tokyo Institute of Technology, Yokohama, Japan
| | - Takeshi Shimi
- Nano Life Science Institute (WPI-NanoLSI), Kanazawa University, Kanazawa, Japan
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3
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Lima JT, Ferreira JG. Mechanobiology of the nucleus during the G2-M transition. Nucleus 2024; 15:2330947. [PMID: 38533923 DOI: 10.1080/19491034.2024.2330947] [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: 11/30/2023] [Accepted: 03/09/2024] [Indexed: 03/28/2024] Open
Abstract
Cellular behavior is continuously influenced by mechanical forces. These forces span the cytoskeleton and reach the nucleus, where they trigger mechanotransduction pathways that regulate downstream biochemical events. Therefore, the nucleus has emerged as a regulator of cellular response to mechanical stimuli. Cell cycle progression is regulated by cyclin-CDK complexes. Recent studies demonstrated these biochemical pathways are influenced by mechanical signals, highlighting the interdependence of cellular mechanics and cell cycle regulation. In particular, the transition from G2 to mitosis (G2-M) shows significant changes in nuclear structure and organization, ranging from nuclear pore complex (NPC) and nuclear lamina disassembly to chromosome condensation. The remodeling of these mechanically active nuclear components indicates that mitotic entry is particularly sensitive to forces. Here, we address how mechanical forces crosstalk with the nucleus to determine the timing and efficiency of the G2-M transition. Finally, we discuss how the deregulation of nuclear mechanics has consequences for mitosis.
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Affiliation(s)
- Joana T Lima
- Epithelial Polarity and Cell Division Laboratory, Instituto de Investigação e Inovação em Saúde (i3S), Porto, Portugal
- Departamento de Biomedicina, Unidade de Biologia Experimental, Faculdade de Medicina do Porto, Porto, Portugal
- Programa Doutoral em Biomedicina, Faculdade de Medicina, Universidade do Porto, Porto, Portugal
| | - Jorge G Ferreira
- Epithelial Polarity and Cell Division Laboratory, Instituto de Investigação e Inovação em Saúde (i3S), Porto, Portugal
- Departamento de Biomedicina, Unidade de Biologia Experimental, Faculdade de Medicina do Porto, Porto, Portugal
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4
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Srivastava LK, Ehrlicher AJ. Sensing the squeeze: nuclear mechanotransduction in health and disease. Nucleus 2024; 15:2374854. [PMID: 38951951 PMCID: PMC11221475 DOI: 10.1080/19491034.2024.2374854] [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: 02/23/2024] [Accepted: 06/26/2024] [Indexed: 07/03/2024] Open
Abstract
The nucleus not only is a repository for DNA but also a center of cellular and nuclear mechanotransduction. From nuclear deformation to the interplay between mechanosensing components and genetic control, the nucleus is poised at the nexus of mechanical forces and cellular function. Understanding the stresses acting on the nucleus, its mechanical properties, and their effects on gene expression is therefore crucial to appreciate its mechanosensitive function. In this review, we examine many elements of nuclear mechanotransduction, and discuss the repercussions on the health of cells and states of illness. By describing the processes that underlie nuclear mechanosensation and analyzing its effects on gene regulation, the review endeavors to open new avenues for studying nuclear mechanics in physiology and diseases.
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Affiliation(s)
| | - Allen J. Ehrlicher
- Department of Bioengineering, McGill University, Montreal, Canada
- Department of Biomedical Engineering, McGill University, Montreal, Canada
- Department of Anatomy and Cell Biology, McGill University, Montreal, Canada
- Centre for Structural Biology, McGill University, Montreal, Canada
- Department of Mechanical Engineering, McGill University, Montreal, Canada
- Rosalind and Morris Goodman Cancer Institute, McGill University, Montreal, Canada
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5
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Lin CY, Sassi A, Wu Y, Seaman K, Tang W, Song X, Bienenstock R, Yokota H, Sun Y, Geng F, Wang L, You L. Mechanotransduction pathways regulating YAP nuclear translocation under Yoda1 and vibration in osteocytes. Bone 2024:117283. [PMID: 39413946 DOI: 10.1016/j.bone.2024.117283] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/12/2024] [Revised: 09/22/2024] [Accepted: 10/11/2024] [Indexed: 10/18/2024]
Abstract
Yes-associated protein (YAP) is a mechanosensitive protein crucial for bone remodeling. Although research has identified pathways and components involved in YAP regulation, the precise mechanisms of its localization during Piezo1 activation or vibration remain unclear. Piezo1, a mechanosensitive ion channel, allows calcium ions to flow into cells upon activation. Recent studies suggest that combining Yoda1, a Piezo1 activator, with low-magnitude high-frequency (LMHF) vibration (>30 Hz, <1 g acceleration) enhances YAP nuclear translocation. This combination potentially improves the mechanoresponse and therapeutic efficacy of LMHF vibration in bone cells. This study aims to elucidate how Yoda1 and LMHF vibration regulate mechanosensitive structures and pathways, leading to YAP nuclear translocation in MLO-Y4 osteocyte like cells. We investigated the roles of the cytoskeleton and nuclear envelope (NE) in YAP activation under combined LMHF vibration and Yoda1 treatments. Additionally, we analyzed differentially expressed genes (DEGs) in MLO-Y4 cells subjected to these treatments and in Piezo1 knockdown MLO-Y4 cells exposed to vibration. Our findings indicated that increased YAP nuclear translocation with combined treatment may result from the distinct effects of Yoda1 and vibration. Specifically, Yoda1 influenced YAP through mechanisms involving actin and NE dynamics, while LMHF vibration may modulate YAP via the interleukin 6 (IL6)/signal transducer and activator of transcription 3 (STAT3) axis. This study provides new insights and potential therapeutic targets for osteocyte-related pathologies.
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Affiliation(s)
- Chun-Yu Lin
- Institute of Biomedical Engineering, University of Toronto, Toronto, ON M5S 3G9, Canada.
| | - Amel Sassi
- Institute of Biomedical Engineering, University of Toronto, Toronto, ON M5S 3G9, Canada.
| | - Yuning Wu
- W Booth School of Engineering Practice and Technology, McMaster University, Hamilton, ON L8S 4L7, Canada.
| | - Kimberly Seaman
- Mechanical and Industrial Engineering, University of Toronto, Toronto, ON M5S 3G8, Canada.
| | - Wentian Tang
- Mechanical and Industrial Engineering, University of Toronto, Toronto, ON M5S 3G8, Canada.
| | - Xin Song
- Mechanical and Industrial Engineering, University of Toronto, Toronto, ON M5S 3G8, Canada.
| | - Raphael Bienenstock
- Institute of Biomedical Engineering, University of Toronto, Toronto, ON M5S 3G9, Canada
| | - Hiroki Yokota
- Department of Biomedical Engineering, Indiana University Purdue University Indianapolis, Indianapolis, IN 46202, USA.
| | - Yu Sun
- Mechanical and Industrial Engineering, University of Toronto, Toronto, ON M5S 3G8, Canada.
| | - Fei Geng
- W Booth School of Engineering Practice and Technology, McMaster University, Hamilton, ON L8S 4L7, Canada.
| | - Liyun Wang
- Department of Mechanical Engineering, University of Delaware, Newark, DE 19716, USA.
| | - Lidan You
- Institute of Biomedical Engineering, University of Toronto, Toronto, ON M5S 3G9, Canada; Mechanical and Industrial Engineering, University of Toronto, Toronto, ON M5S 3G8, Canada; Mechanical and Materials Engineering, Queens University, Kingston, ON K7L3N6, Canada.
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6
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Krishnamurthy M, Dhall A, Schultz CW, Baird MA, Desai P, Odell J, Sahoo S, Takahashi N, Nirula M, Zhuang S, Huang Y, Schroeder B, Zhang Y, Thomas MS, Redon C, Robinson C, Thang L, Ileva L, Patel NL, Kalen JD, Varlet AA, Zuela-Sopilniak N, Jha A, Wangsa D, Butcher D, Morgan T, Afzal AN, Chari R, Baktiar K, Kumar S, Pongor L, Difilippantonio S, Aladjem MI, Pommier Y, Jolly MK, Lammerding J, Sharma AK, Thomas A. Metastatic organotropism in small cell lung cancer. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.10.07.617066. [PMID: 39416100 PMCID: PMC11483079 DOI: 10.1101/2024.10.07.617066] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2024]
Abstract
Metastasis is the leading cause of cancer-related deaths, yet its regulatory mechanisms are not fully understood. Small-cell lung cancer (SCLC) is the most metastatic form of lung cancer, with most patients presenting with widespread disease, making it an ideal model for studying metastasis. However, the lack of suitable preclinical models has limited such studies. We utilized well-annotated rapid autopsy-derived tumors to develop xenograft models that mimic key features of SCLC, including histopathology, rapid and widespread development of metastasis to the liver, brain, adrenal, bone marrow, and kidneys within weeks, and response to chemotherapy. By integrating in vivo lineage selection with comprehensive transcriptomic and epigenomic analyses, we identified critical cellular programs driving metastatic organotropism to the liver and brain, the most common sites of SCLC metastasis. Our findings reveal the key role of nuclear-cytoskeletal interactions in SCLC liver metastasis. Specifically, the loss of the nuclear envelope protein lamin A/C, encoded by the LMNA gene, increased nuclear deformability and significantly increased the incidence of liver metastasis. Human liver metastases exhibited reduced LMNA expression compared to other metastatic sites, correlating with poorer patient outcomes and increased mortality. This study introduces novel preclinical models for SCLC metastasis and highlights pathways critical for organ-specific metastasis, offering new avenues for the development of targeted therapies to prevent or treat metastatic disease.
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7
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Tong XY, Norenberg MD, Paidas MJ, Shamaladevi N, Salgueiro L, Jaszberenyi M, John B, Hussain H, El Hiba O, Abdeljalil EG, Bilal EM, Natarajan S, Romaguera R, Papayan S, Carden AK, Ramamoorthy R, Elumalai N, Schally AV, Nithura J, Patrizio R, Jayakumar AR. Mechanism of Alzheimer type II astrocyte development in hepatic encephalopathy. Neurochem Int 2024; 180:105866. [PMID: 39369794 DOI: 10.1016/j.neuint.2024.105866] [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: 05/14/2024] [Revised: 09/19/2024] [Accepted: 09/22/2024] [Indexed: 10/08/2024]
Abstract
Type C hepatic encephalopathy (Type C HE) is a major and complex neurological condition that occurs following chronic liver failure. The molecular basis of Type C HE remains elusive. Type C HE is characterized by mental confusion, cognitive and motor disturbances. The presence of Alzheimer type II astrocytes (AT2A) is the key histopathological finding observed in Type C HE. However, nothing is currently known regarding AT2A development and its involvement in cognitive, and motor deficits in Type C HE. We, therefore, examined in rats the mechanisms by which liver failure contributes to the progression of AT2A, and its role in the development of cognitive and motor deficits in thioacetamide (TAA) model of Type C HE. We and others earlier reported increased oxidative/nitrosative stress (ONS), JNK1/2, and cMyc activation in ammonia-treated astrocyte cultures, as well as in brains from chronic liver failure. We now found increased levels of astrocytic glia maturation factor (GMF, a factor strongly implicated in neuroinflammation), as well as various inflammatory factors (IL-1β, TNF-α, IL-6, MMP-3, COX2, CXCL1, and PGE2), and reduced levels of GFAP and increased levels of aggregated nuclear protein Lamin A/C in rat brain cortex post-chronic liver failure. We also found increased levels of GMF and inflammatory factors (MMP-3, COX2, CXCL1, and PGE2) in astrocytes post-ammonia treatment in vitro. Additionally, pharmacological inhibition of upstream signaling of GMF (ONS, JNK1/2, and cMyc) or GMF inhibitors W-7 and trifluoperazine significantly reduced the levels of inflammatory factors, the number of AT2A cells, as well as the cognitive and motor deficits in TAA-treated rats. Increased levels of GMF were also identified in human post-mortem brain sections. These findings strongly suggest that increased levels of astrocytic GMF due to elevated levels of ONS, JNK1/2, and cMyc and the subsequent inflammation contribute to the development of AT2A and the consequent cognitive, and motor deficits in chronic liver failure.
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Affiliation(s)
- Xiao Y Tong
- Department of Pathology, University of Miami School of Medicine, Miami, FL, USA
| | - Michael D Norenberg
- Department of Pathology, University of Miami School of Medicine, Miami, FL, USA
| | - Michael J Paidas
- Department of Obstetrics, Gynecology and Reproductive Sciences, University of Miami School of Medicine, Miami, FL, USA; Department of Biochemistry & Molecular Biology, University of Miami School of Medicine, Miami, FL, USA
| | | | - Luis Salgueiro
- General Medical Research, R&D Services, Department of Veterans Affairs, Miami, FL, USA
| | - Miklos Jaszberenyi
- General Medical Research, R&D Services, Department of Veterans Affairs, Miami, FL, USA; Department of Pathophysiology, Faculty of Medicine, University of Szeged, Hungary
| | - Binu John
- General Medical Research, R&D Services, Department of Veterans Affairs, Miami, FL, USA
| | - Hussain Hussain
- Larkin Community Hospital, Department of Internal Medicine and Infectious Disease, Miami, FL, USA
| | - Omar El Hiba
- Laboratory of Anthropogenic, Biotechnology, and Health, Nutritional Physiopathologies, Neuroscience and Toxicology Team, Faculty of Sciences, Chouaib Doukkali University, Av Des facultés, 24000, El Jadida, Morocco; The Hassan First University of Settat, Higher Institute of Health Sciences, Laboratory of Health Sciences and Technology, Morocco
| | - El Got Abdeljalil
- Laboratory of Anthropogenic, Biotechnology, and Health, Nutritional Physiopathologies, Neuroscience and Toxicology Team, Faculty of Sciences, Chouaib Doukkali University, Av Des facultés, 24000, El Jadida, Morocco; The Hassan First University of Settat, Higher Institute of Health Sciences, Laboratory of Health Sciences and Technology, Morocco
| | - El-Mansoury Bilal
- Laboratory of Anthropogenic, Biotechnology, and Health, Nutritional Physiopathologies, Neuroscience and Toxicology Team, Faculty of Sciences, Chouaib Doukkali University, Av Des facultés, 24000, El Jadida, Morocco; The Hassan First University of Settat, Higher Institute of Health Sciences, Laboratory of Health Sciences and Technology, Morocco
| | - Sampath Natarajan
- Department of Chemistry, School of Chemical and Biotechnology, SASTRA Deemed University, Tamil Nadu, India
| | - Rita Romaguera
- Pathology and Laboratory Medicine, Department of Veterans Affairs, Miami, FL, 33125, USA
| | - Stanislav Papayan
- Pathology and Laboratory Medicine, Department of Veterans Affairs, Miami, FL, 33125, USA
| | - Arianna K Carden
- Department of Obstetrics, Gynecology and Reproductive Sciences, University of Miami School of Medicine, Miami, FL, USA
| | - Rajalakshmi Ramamoorthy
- Department of Obstetrics, Gynecology and Reproductive Sciences, University of Miami School of Medicine, Miami, FL, USA
| | - Nila Elumalai
- Department of Obstetrics, Gynecology and Reproductive Sciences, University of Miami School of Medicine, Miami, FL, USA
| | - Andrew V Schally
- Endocrine, Polypeptide, and Cancer Institute, Department of Veterans Affairs, Miami, FL, 33125, USA
| | | | - Rebecca Patrizio
- Department of Obstetrics, Gynecology and Reproductive Sciences, University of Miami School of Medicine, Miami, FL, USA
| | - Arumugam R Jayakumar
- Department of Obstetrics, Gynecology and Reproductive Sciences, University of Miami School of Medicine, Miami, FL, USA; General Medical Research, R&D Services, Department of Veterans Affairs, Miami, FL, USA; Neuropathology Section, Veterans Affairs Medical Center, Miami, FL, USA; R&D Services and South Florida VA Foundation for Research and Education Inc, Veterans Affairs Medical Center, Miami, FL, USA.
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8
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Dickinson RB, Abolghasemzade S, Lele TP. Rethinking nuclear shaping: insights from the nuclear drop model. SOFT MATTER 2024; 20:7558-7565. [PMID: 39105242 PMCID: PMC11446230 DOI: 10.1039/d4sm00683f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/07/2024]
Abstract
Changes in the nuclear shape caused by cellular shape changes are generally assumed to reflect an elastic deformation from a spherical nuclear shape. Recent evidence, however, suggests that the nuclear lamina, which forms the outer nuclear surface together with the nuclear envelope, possesses more area than that of a sphere of the same volume. This excess area manifests as folds/wrinkles in the nuclear surface in rounded cells and allows facile nuclear flattening during cell spreading without any changes in nuclear volume or surface area. When the lamina becomes smooth and taut, it is inextensible, and supports a surface tension. At this point, it is possible to mathematically calculate the limiting nuclear shape purely based on geometric considerations. In this paper, we provide a commentary on the "nuclear drop model" which seeks to integrate the above features. We outline its testable physical properties and explore its biological implications.
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Affiliation(s)
- Richard B Dickinson
- Department of Chemical Engineering, University of Florida, 1030 Center Drive, Gainesville, FL, 32611, USA.
| | - Samere Abolghasemzade
- Department of Biomedical Engineering, Texas A&M University, 101 Bizzell St., College Station, TX, 77843, USA.
| | - Tanmay P Lele
- Department of Biomedical Engineering, Texas A&M University, 101 Bizzell St., College Station, TX, 77843, USA.
- Artie McFerrin Department of Chemical Engineering, Texas A&M University, 3122 TAMU, College Station, TX, 77843, USA
- Department of Translational Medical Sciences, Texas A&M University, 2121 W Holcombe St., Houston, TX, 77030, USA
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9
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Mistriotis P, Wisniewski EO, Si BR, Kalab P, Konstantopoulos K. Coordinated in confined migration: crosstalk between the nucleus and ion channel-mediated mechanosensation. Trends Cell Biol 2024; 34:809-825. [PMID: 38290913 PMCID: PMC11284253 DOI: 10.1016/j.tcb.2024.01.001] [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: 09/03/2023] [Revised: 12/22/2023] [Accepted: 01/05/2024] [Indexed: 02/01/2024]
Abstract
Cell surface and intracellular mechanosensors enable cells to perceive different geometric, topographical, and physical cues. Mechanosensitive ion channels (MICs) localized at the cell surface and on the nuclear envelope (NE) are among the first to sense and transduce these signals. Beyond compartmentalizing the genome of the cell and its transcription, the nucleus also serves as a mechanical gauge of different physical and topographical features of the tissue microenvironment. In this review, we delve into the intricate mechanisms by which the nucleus and different ion channels regulate cell migration in confinement. We review evidence suggesting an interplay between macromolecular nuclear-cytoplasmic transport (NCT) and ionic transport across the cell membrane during confined migration. We also discuss the roles of the nucleus and ion channel-mediated mechanosensation, whether acting independently or in tandem, in orchestrating migratory mechanoresponses. Understanding nuclear and ion channel sensing, and their crosstalk, is critical to advancing our knowledge of cell migration in health and disease.
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Affiliation(s)
| | - Emily O Wisniewski
- Department of Chemical and Biomolecular Engineering, The Johns Hopkins University, Baltimore, MD 21218, USA; Johns Hopkins Institute for NanoBioTechnology, The Johns Hopkins University, Baltimore, MD 21218, USA
| | - Bishwa R Si
- Department of Chemical and Biomolecular Engineering, The Johns Hopkins University, Baltimore, MD 21218, USA; Johns Hopkins Institute for NanoBioTechnology, The Johns Hopkins University, Baltimore, MD 21218, USA
| | - Petr Kalab
- Department of Chemical and Biomolecular Engineering, The Johns Hopkins University, Baltimore, MD 21218, USA.
| | - Konstantinos Konstantopoulos
- Department of Chemical and Biomolecular Engineering, The Johns Hopkins University, Baltimore, MD 21218, USA; Johns Hopkins Institute for NanoBioTechnology, The Johns Hopkins University, Baltimore, MD 21218, USA; Department of Biomedical Engineering, The Johns Hopkins University, Baltimore, MD 21218, USA; Department of Oncology, The Johns Hopkins University, Baltimore, MD 21205, USA.
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10
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Amiri F, Akinpelu AA, Keith WC, Hemmati F, Vaghasiya RS, Bowen D, Waliagha RS, Wang C, Chen P, Mitra AK, Li Y, Mistriotis P. Confinement controls the directional cell responses to fluid forces. Cell Rep 2024; 43:114692. [PMID: 39207902 DOI: 10.1016/j.celrep.2024.114692] [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: 05/14/2024] [Revised: 07/18/2024] [Accepted: 08/12/2024] [Indexed: 09/04/2024] Open
Abstract
Our understanding of how fluid forces influence cell migration in confining environments remains limited. By integrating microfluidics with live-cell imaging, we demonstrate that cells in tightly-but not moderately-confined spaces reverse direction and move upstream upon exposure to fluid forces. This fluid force-induced directional change occurs less frequently when cells display diminished mechanosensitivity, experience elevated hydraulic resistance, or sense a chemical gradient. Cell reversal requires actin polymerization to the new cell front, as shown mathematically and experimentally. Actin polymerization is necessary for the fluid force-induced activation of NHE1, which cooperates with calcium to induce upstream migration. Calcium levels increase downstream, mirroring the subcellular distribution of myosin IIA, whose activation enhances upstream migration. Reduced lamin A/C levels promote downstream migration of metastatic tumor cells by preventing cell polarity establishment and intracellular calcium rise. This mechanism could allow cancer cells to evade high-pressure environments, such as the primary tumor.
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Affiliation(s)
- Farshad Amiri
- Department of Chemical Engineering, Auburn University, Auburn, AL 36849, USA
| | - Ayuba A Akinpelu
- Department of Chemical Engineering, Auburn University, Auburn, AL 36849, USA
| | - William C Keith
- Department of Chemical Engineering, Auburn University, Auburn, AL 36849, USA
| | - Farnaz Hemmati
- Department of Chemical Engineering, Auburn University, Auburn, AL 36849, USA
| | - Ravi S Vaghasiya
- Department of Chemical Engineering, Auburn University, Auburn, AL 36849, USA
| | - Dylan Bowen
- Department of Chemical Engineering, Auburn University, Auburn, AL 36849, USA
| | - Razan S Waliagha
- Department of Drug Discovery and Development, Harrison College of Pharmacy, Auburn University, Auburn, AL 36849, USA
| | - Chuanyu Wang
- Materials Research and Education Center, Auburn University, Auburn, AL 36849, USA
| | - Pengyu Chen
- Materials Research and Education Center, Auburn University, Auburn, AL 36849, USA
| | - Amit K Mitra
- Department of Drug Discovery and Development, Harrison College of Pharmacy, Auburn University, Auburn, AL 36849, USA; Center for Pharmacogenomics and Single-Cell Omics (AUPharmGx), Harrison College of Pharmacy, Auburn University, Auburn, AL 36849, USA; UAB O'Neal Comprehensive Cancer, University of Alabama at Birmingham School of Medicine, Birmingham, AL 35233, USA
| | - Yizeng Li
- Department of Biomedical Engineering, Binghamton University, SUNY, Binghamton, NY 13902, USA
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11
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Coelho-Rato LS, Parvanian S, Andrs Salajkova S, Medalia O, Eriksson JE. Intermediate filaments at a glance. J Cell Sci 2024; 137:jcs261386. [PMID: 39206824 DOI: 10.1242/jcs.261386] [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] [Indexed: 09/04/2024] Open
Abstract
Intermediate filaments (IFs) comprise a large family of versatile cytoskeletal proteins, divided into six subtypes with tissue-specific expression patterns. IFs have a wide repertoire of cellular functions, including providing structural support to cells, as well as active roles in mechanical support and signaling pathways. Consequently, defects in IFs are associated with more than 100 diseases. In this Cell Science at a Glance article, we discuss the established classes of IFs and their general features, their functions beyond structural support, and recent advances in the field. We also highlight their involvement in disease and potential use as clinical markers of pathological conditions. Finally, we provide our view on current knowledge gaps and the future directions of the IF field.
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Affiliation(s)
- Leila S Coelho-Rato
- Turku Bioscience Centre, University of Turku and Åbo Akademi University, 20520 Turku, Finland
- Faculty of Science and Engineering, Cell Biology, Åbo Akademi University, 20520 Turku, Finland
| | - Sepideh Parvanian
- Turku Bioscience Centre, University of Turku and Åbo Akademi University, 20520 Turku, Finland
- Faculty of Science and Engineering, Cell Biology, Åbo Akademi University, 20520 Turku, Finland
- Center for Systems Biology, Massachusetts General Hospital Research Institute and Harvard Medical School, Boston, MA 02114, USA
| | - Sarka Andrs Salajkova
- Department of Biochemistry, University of Zurich, Winterthurerstrasse 190, 8057 Zurich, Switzerland
| | - Ohad Medalia
- Department of Biochemistry, University of Zurich, Winterthurerstrasse 190, 8057 Zurich, Switzerland
| | - John E Eriksson
- Turku Bioscience Centre, University of Turku and Åbo Akademi University, 20520 Turku, Finland
- Faculty of Science and Engineering, Cell Biology, Åbo Akademi University, 20520 Turku, Finland
- Euro-Bioimaging ERIC, 20520 Turku, Finland
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12
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Samardak K, Bâcle J, Moriel-Carretero M. Behind the stoNE wall: A fervent activity for nuclear lipids. Biochimie 2024:S0300-9084(24)00179-2. [PMID: 39111564 DOI: 10.1016/j.biochi.2024.08.002] [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: 04/09/2024] [Revised: 08/01/2024] [Accepted: 08/02/2024] [Indexed: 09/27/2024]
Abstract
The four main types of biomolecules are nucleic acids, proteins, carbohydrates and lipids. The knowledge about their respective interactions is as important as the individual understanding of each of them. However, while, for example, the interaction of proteins with the other three groups is extensively studied, that of nucleic acids and lipids is, in comparison, very poorly explored. An iconic paradigm of physical (and likely functional) proximity between DNA and lipids is the case of the genomic DNA in eukaryotes: enclosed within the nucleus by two concentric lipid bilayers, the wealth of implications of this interaction, for example in genome stability, remains underassessed. Nuclear lipid-related phenotypes have been observed for 50 years, yet in most cases kept as mere anecdotical descriptions. In this review, we will bring together the evidence connecting lipids with both the nuclear envelope and the nucleoplasm, and will make critical analyses of these descriptions. Our exploration establishes a scenario in which lipids irrefutably play a role in nuclear homeostasis.
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Affiliation(s)
- Kseniya Samardak
- Centre de Recherche en Biologie cellulaire de Montpellier (CRBM) UMR5237, Université de Montpellier, Centre National de La Recherche Scientifique, 34293 Montpellier Cedex 5, France
| | - Janélie Bâcle
- Centre de Recherche en Biologie cellulaire de Montpellier (CRBM) UMR5237, Université de Montpellier, Centre National de La Recherche Scientifique, 34293 Montpellier Cedex 5, France
| | - María Moriel-Carretero
- Centre de Recherche en Biologie cellulaire de Montpellier (CRBM) UMR5237, Université de Montpellier, Centre National de La Recherche Scientifique, 34293 Montpellier Cedex 5, France.
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13
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Wang Z, Zhao N, Zhang S, Wang D, Wang S, Liu N. YEATS domain-containing protein GAS41 regulates nuclear shape by working in concert with BRD2 and the mediator complex in colorectal cancer. Pharmacol Res 2024; 206:107283. [PMID: 38964523 DOI: 10.1016/j.phrs.2024.107283] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/16/2024] [Revised: 06/21/2024] [Accepted: 06/22/2024] [Indexed: 07/06/2024]
Abstract
The maintenance of nuclear shape is essential for cellular homeostasis and disruptions in this process have been linked to various pathological conditions, including cancer, laminopathies, and aging. Despite the significance of nuclear shape, the precise molecular mechanisms controlling it are not fully understood. In this study, we have identified the YEATS domain-containing protein 4 (GAS41) as a previously unidentified factor involved in regulating nuclear morphology. Genetic ablation of GAS41 in colorectal cancer cells resulted in significant abnormalities in nuclear shape and inhibited cancer cell proliferation both in vitro and in vivo. Restoration experiments revealed that wild-type GAS41, but not a YEATS domain mutant devoid of histone H3 lysine 27 acetylation or crotonylation (H3K27ac/cr) binding, rescued the aberrant nuclear phenotypes in GAS41-deficient cells, highlighting the importance of GAS41's binding to H3K27ac/cr in nuclear shape regulation. Further experiments showed that GAS41 interacts with H3K27ac/cr to regulate the expression of key nuclear shape regulators, including LMNB1, LMNB2, SYNE4, and LEMD2. Mechanistically, GAS41 recruited BRD2 and the Mediator complex to gene loci of these regulators, promoting their transcriptional activation. Disruption of GAS41-H3K27ac/cr binding caused BRD2, MED14 and MED23 to dissociate from gene loci, leading to nuclear shape abnormalities. Overall, our findings demonstrate that GAS41 collaborates with BRD2 and the Mediator complex to control the expression of crucial nuclear shape regulators.
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Affiliation(s)
- Zhengmin Wang
- Department of Infectious Diseases and Center of Infectious Diseases and Pathogen Biology, Key Laboratory of Organ Regeneration and Transplantation of the Ministry of Education, The First Hospital of Jilin University, Changchun 130021, China
| | - Nan Zhao
- Bethune Institute of Epigenetic Medicine, The First Hospital of Jilin University, Changchun 130021, China
| | - Siwei Zhang
- Department of Pharmacology, College of Basic Medical Sciences, Jilin University, Changchun 130000, China
| | - Deyu Wang
- Bethune Institute of Epigenetic Medicine, The First Hospital of Jilin University, Changchun 130021, China
| | - Shuai Wang
- Bethune Institute of Epigenetic Medicine, The First Hospital of Jilin University, Changchun 130021, China
| | - Nan Liu
- Department of Infectious Diseases and Center of Infectious Diseases and Pathogen Biology, Key Laboratory of Organ Regeneration and Transplantation of the Ministry of Education, The First Hospital of Jilin University, Changchun 130021, China.
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14
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Odell J, Lammerding J. N-terminal tags impair the ability of Lamin A to provide structural support to the nucleus. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.04.19.590311. [PMID: 39211210 PMCID: PMC11361184 DOI: 10.1101/2024.04.19.590311] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/04/2024]
Abstract
Lamins are intermediate filament proteins that contribute to numerous cellular functions, including nuclear morphology and mechanical stability. The N-terminal head domain of lamin is critical for higher order filament assembly and function, yet the effects of commonly used N-terminal tags on lamin function remain largely unexplored. Here, we systematically studied the effect of two differently sized tags on Lamin A (LaA) function in a mammalian cell model engineered to allow for precise control of expression of tagged lamin proteins. Untagged, FLAG-tagged, and GFP-tagged LaA completely rescued nuclear shape defects when expressed at similar levels in lamin A/C-deficient ( Lmna -/- ) MEFs, and all LaA constructs prevented increased nuclear envelope (NE) ruptures in these cells. N-terminal tags, however, altered the nuclear localization of LaA and impaired the ability of LaA to restore nuclear deformability and to recruit Emerin to the nuclear membrane in Lmna -/- MEFs. Our finding that tags impede some LaA functions but not others may explain the partial loss of function phenotypes when tagged lamins are expressed in model organisms and should caution researchers using tagged lamins to study the nucleus.
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15
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Kirti A, Simnani FZ, Jena S, Lenka SS, Kalalpitiya C, Naser SS, Singh D, Choudhury A, Sahu RN, Yadav A, Sinha A, Nandi A, Panda PK, Kaushik NK, Suar M, Verma SK. Nanoparticle-mediated metronomic chemotherapy in cancer: A paradigm of precision and persistence. Cancer Lett 2024; 594:216990. [PMID: 38801886 DOI: 10.1016/j.canlet.2024.216990] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2023] [Revised: 03/05/2024] [Accepted: 05/23/2024] [Indexed: 05/29/2024]
Abstract
Current methods of cancer therapy have demonstrated enormous potential in tumor inhibition. However, a high dosage regimen of chemotherapy results in various complications which affect the normal body cells. Tumor cells also develop resistance against the prescribed drugs in the whole treatment regimen increasing the risk of cancer relapse. Metronomic chemotherapy is a modern treatment method that involves administering drugs at low doses continuously, allowing the drug sufficient time to take its effect. This method ensures that the toxicity of the drugs is to a minimum in comparison to conventional chemotherapy. Nanoparticles have shown efficacy in delivering drugs to the tumor cells in various cancer therapies. Combining nanoparticles with metronomic chemotherapy can yield better treatment results. This combination stimulates the immune system, improving cancer cells recognition by immune cells. Evidence from clinical and pre-clinical trials supports the use of metronomic delivery for drug-loaded nanoparticles. This review focuses on the functionalization of nanoparticles for improved drug delivery and inhibition of tumor growth. It emphasizes the mechanisms of metronomic chemotherapy and its conjunction with nanotechnology. Additionally, it explores tumor progression and the current methods of chemotherapy. The challenges associated with nano-based metronomic chemotherapy are outlined, paving the way for prospects in this dynamic field.
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Affiliation(s)
- Apoorv Kirti
- KIIT School of Biotechnology, KIIT University, Bhubaneswar, 751024, India
| | | | - Snehasmita Jena
- KIIT School of Biotechnology, KIIT University, Bhubaneswar, 751024, India
| | - Sudakshya S Lenka
- KIIT School of Biotechnology, KIIT University, Bhubaneswar, 751024, India
| | | | | | - Dibyangshee Singh
- KIIT School of Biotechnology, KIIT University, Bhubaneswar, 751024, India
| | - Anmol Choudhury
- KIIT School of Biotechnology, KIIT University, Bhubaneswar, 751024, India
| | - Rudra Narayan Sahu
- KIIT School of Biotechnology, KIIT University, Bhubaneswar, 751024, India
| | - Anu Yadav
- KIIT School of Biotechnology, KIIT University, Bhubaneswar, 751024, India
| | - Adrija Sinha
- KIIT School of Biotechnology, KIIT University, Bhubaneswar, 751024, India
| | - Aditya Nandi
- KIIT School of Biotechnology, KIIT University, Bhubaneswar, 751024, India; Instituto de Investigaciones en Materiales, UNAM, 04510, CDMX, Mexico
| | - Pritam Kumar Panda
- Condensed Matter Theory Group, Materials Theory Division, Department of Physics and Astronomy, Uppsala University, Box 516, SE-751 20, Uppsala, Sweden
| | - Nagendra Kumar Kaushik
- Plasma Bioscience Research Center, Department of Electrical and Biological Physics, Kwangwoon University, Seoul, 01897, Republic of Korea.
| | - Mrutyunjay Suar
- KIIT School of Biotechnology, KIIT University, Bhubaneswar, 751024, India.
| | - Suresh K Verma
- KIIT School of Biotechnology, KIIT University, Bhubaneswar, 751024, India.
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16
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Urbanska M, Guck J. Single-Cell Mechanics: Structural Determinants and Functional Relevance. Annu Rev Biophys 2024; 53:367-395. [PMID: 38382116 DOI: 10.1146/annurev-biophys-030822-030629] [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] [Indexed: 02/23/2024]
Abstract
The mechanical phenotype of a cell determines its ability to deform under force and is therefore relevant to cellular functions that require changes in cell shape, such as migration or circulation through the microvasculature. On the practical level, the mechanical phenotype can be used as a global readout of the cell's functional state, a marker for disease diagnostics, or an input for tissue modeling. We focus our review on the current knowledge of structural components that contribute to the determination of the cellular mechanical properties and highlight the physiological processes in which the mechanical phenotype of the cells is of critical relevance. The ongoing efforts to understand how to efficiently measure and control the mechanical properties of cells will define the progress in the field and drive mechanical phenotyping toward clinical applications.
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Affiliation(s)
- Marta Urbanska
- Max Planck Institute for the Science of Light, Erlangen, Germany; ,
- Max-Planck-Zentrum für Physik und Medizin, Erlangen, Germany
- Department of Physiology, Development and Neuroscience, University of Cambridge, Cambridge, UK
| | - Jochen Guck
- Max Planck Institute for the Science of Light, Erlangen, Germany; ,
- Max-Planck-Zentrum für Physik und Medizin, Erlangen, Germany
- Department of Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Erlangen, Germany
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17
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Chen H, Wang S, Cao Y, Lei H. Molecular Force Sensors for Biological Application. Int J Mol Sci 2024; 25:6198. [PMID: 38892386 PMCID: PMC11173168 DOI: 10.3390/ijms25116198] [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: 04/29/2024] [Revised: 05/29/2024] [Accepted: 05/29/2024] [Indexed: 06/21/2024] Open
Abstract
The mechanical forces exerted by cells on their surrounding microenvironment are known as cellular traction forces. These forces play crucial roles in various biological processes, such as tissue development, wound healing and cell functions. However, it is hard for traditional techniques to measure cellular traction forces accurately because their magnitude (from pN to nN) and the length scales over which they occur (from nm to μm) are extremely small. In order to fully understand mechanotransduction, highly sensitive tools for measuring cellular forces are needed. Current powerful techniques for measuring traction forces include traction force microscopy (TFM) and fluorescent molecular force sensors (FMFS). In this review, we elucidate the force imaging principles of TFM and FMFS. Then we highlight the application of FMFS in a variety of biological processes and offer our perspectives and insights into the potential applications of FMFS.
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Affiliation(s)
- Huiyan Chen
- National Laboratory of Solid State Microstructure, Department of Physics, Nanjing University, Nanjing 210093, China; (H.C.); (S.W.)
| | - Shouhan Wang
- National Laboratory of Solid State Microstructure, Department of Physics, Nanjing University, Nanjing 210093, China; (H.C.); (S.W.)
| | - Yi Cao
- National Laboratory of Solid State Microstructure, Department of Physics, Nanjing University, Nanjing 210093, China; (H.C.); (S.W.)
| | - Hai Lei
- School of Physics, Zhejiang University, Hangzhou 310027, China
- Institute for Advanced Study in Physics, Zhejiang University, Hangzhou 310027, China
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18
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Sikder K, Phillips E, Zhong Z, Wang N, Saunders J, Mothy D, Kossenkov A, Schneider T, Nichtova Z, Csordas G, Margulies KB, Choi JC. Perinuclear damage from nuclear envelope deterioration elicits stress responses that contribute to LMNA cardiomyopathy. SCIENCE ADVANCES 2024; 10:eadh0798. [PMID: 38718107 PMCID: PMC11078192 DOI: 10.1126/sciadv.adh0798] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Accepted: 04/03/2024] [Indexed: 05/12/2024]
Abstract
Mutations in the LMNA gene encoding lamins A/C cause an array of tissue-selective diseases, with the heart being the most commonly affected organ. Despite progress in understanding the perturbations emanating from LMNA mutations, an integrative understanding of the pathogenesis underlying cardiac dysfunction remains elusive. Using a novel conditional deletion model capable of translatome profiling, we observed that cardiomyocyte-specific Lmna deletion in adult mice led to rapid cardiomyopathy with pathological remodeling. Before cardiac dysfunction, Lmna-deleted cardiomyocytes displayed nuclear abnormalities, Golgi dilation/fragmentation, and CREB3-mediated stress activation. Translatome profiling identified MED25 activation, a transcriptional cofactor that regulates Golgi stress. Autophagy is disrupted in the hearts of these mice, which can be recapitulated by disrupting the Golgi. Systemic administration of modulators of autophagy or ER stress significantly delayed cardiac dysfunction and prolonged survival. These studies support a hypothesis wherein stress responses emanating from the perinuclear space contribute to the LMNA cardiomyopathy development.
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Affiliation(s)
- Kunal Sikder
- Center for Translational Medicine, Department of Medicine, Thomas Jefferson University, Philadelphia PA, USA
| | - Elizabeth Phillips
- Center for Translational Medicine, Department of Medicine, Thomas Jefferson University, Philadelphia PA, USA
| | - Zhijiu Zhong
- Translational Research and Pathology, Thomas Jefferson University, Philadelphia, PA, USA
| | - Nadan Wang
- Center for Translational Medicine, Department of Medicine, Thomas Jefferson University, Philadelphia PA, USA
| | - Jasmine Saunders
- Center for Translational Medicine, Department of Medicine, Thomas Jefferson University, Philadelphia PA, USA
| | - David Mothy
- Center for Translational Medicine, Department of Medicine, Thomas Jefferson University, Philadelphia PA, USA
| | - Andrew Kossenkov
- Bioinformatics Facility, The Wistar Institute Cancer Center, Philadelphia, PA, USA
| | - Timothy Schneider
- Mitocare, Department of Pathology, Anatomy, and Cell Biology, Thomas Jefferson University, Philadelphia, PA, USA
| | - Zuzana Nichtova
- Mitocare, Department of Pathology, Anatomy, and Cell Biology, Thomas Jefferson University, Philadelphia, PA, USA
| | - Gyorgy Csordas
- Mitocare, Department of Pathology, Anatomy, and Cell Biology, Thomas Jefferson University, Philadelphia, PA, USA
| | - Kenneth B. Margulies
- Cardiovascular Institute, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Jason C. Choi
- Center for Translational Medicine, Department of Medicine, Thomas Jefferson University, Philadelphia PA, USA
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19
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Zhang D, Wu W, Zhang W, Feng Q, Zhang Q, Liang H. Nuclear deformation and cell division of single cell on elongated micropatterned substrates fabricated by DMD lithography. Biofabrication 2024; 16:035001. [PMID: 38471164 DOI: 10.1088/1758-5090/ad3319] [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: 11/18/2023] [Accepted: 03/12/2024] [Indexed: 03/14/2024]
Abstract
Cells sense mechanical signals from the surrounding environment and transmit them to the nucleus through mechanotransduction to regulate cellular behavior. Microcontact printing, which utilizes elastomer stamps, is an effective method for simulating the cellular microenvironment and manipulating cell morphology. However, the conventional fabrication process of silicon masters and elastomer stamps requires complex procedures and specialized equipment, which restricts the widespread application of micropatterning in cell biology and hinders the investigation of the role of cell geometry in regulating cell behavior. In this study, we present an innovative method for convenient resin stamp microfabrication based on digital micromirror device planar lithography. Using this method, we generated a series of patterns ranging from millimeter to micrometer scales and validated their effectiveness in controlling adhesion at both collective and individual cell levels. Additionally, we investigated mechanotransduction and cell behavior on elongated micropatterned substrates. We then examined the effects of cell elongation on cytoskeleton organization, nuclear deformation, focal adhesion formation, traction force generation, nuclear mechanics, and the growth of HeLa cells. Our findings reveal a positive correlation between cell length and mechanotransduction. Interestingly, HeLa cells with moderate length exhibit the highest cell division and proliferation rates. These results highlight the regulatory role of cell elongation in mechanotransduction and its significant impact on cancer cell growth. Furthermore, our methodology for controlling cell adhesion holds the potential for addressing fundamental questions in both cell biology and biomedical engineering.
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Affiliation(s)
- Duo Zhang
- CAS Key Laboratory of Mechanical Behavior and Design of Material, Department of Modern Mechanics, University of Science and Technology of China, Hefei, Anhui 230000, People's Republic of China
| | - Wenjie Wu
- CAS Key Laboratory of Mechanical Behavior and Design of Material, Department of Modern Mechanics, University of Science and Technology of China, Hefei, Anhui 230000, People's Republic of China
| | - Wanying Zhang
- Cancer Research Center, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui 230000, People's Republic of China
| | - Qiyu Feng
- Cancer Research Center, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui 230000, People's Republic of China
| | - Qingchuan Zhang
- CAS Key Laboratory of Mechanical Behavior and Design of Material, Department of Modern Mechanics, University of Science and Technology of China, Hefei, Anhui 230000, People's Republic of China
| | - Haiyi Liang
- CAS Key Laboratory of Mechanical Behavior and Design of Material, Department of Modern Mechanics, University of Science and Technology of China, Hefei, Anhui 230000, People's Republic of China
- School of Civil Engineering, Anhui Jianzhu University, Hefei, Anhui 230601, People's Republic of China
- IAT-Chungu Joint Laboratory for Additive Manufacturing, Anhui Chungu 3D Printing Institute of Intelligent Equipment and Industrial Technology, Wuhu, Anhui 241000, People's Republic of China
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20
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Schamberger B, Ehrig S, Dechat T, Spitzer S, Bidan CM, Fratzl P, Dunlop JWC, Roschger A. Twisted-plywood-like tissue formation in vitro. Does curvature do the twist? PNAS NEXUS 2024; 3:pgae121. [PMID: 38590971 PMCID: PMC10999733 DOI: 10.1093/pnasnexus/pgae121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/05/2023] [Accepted: 02/23/2024] [Indexed: 04/10/2024]
Abstract
Little is known about the contribution of 3D surface geometry to the development of multilayered tissues containing fibrous extracellular matrix components, such as those found in bone. In this study, we elucidate the role of curvature in the formation of chiral, twisted-plywood-like structures. Tissues consisting of murine preosteoblast cells (MC3T3-E1) were grown on 3D scaffolds with constant-mean curvature and negative Gaussian curvature for up to 32 days. Using 3D fluorescence microscopy, the influence of surface curvature on actin stress-fiber alignment and chirality was investigated. To gain mechanistic insights, we did experiments with MC3T3-E1 cells deficient in nuclear A-type lamins or treated with drugs targeting cytoskeleton proteins. We find that wild-type cells form a thick tissue with fibers predominantly aligned along directions of negative curvature, but exhibiting a twist in orientation with respect to older tissues. Fiber orientation is conserved below the tissue surface, thus creating a twisted-plywood-like material. We further show that this alignment pattern strongly depends on the structural components of the cells (A-type lamins, actin, and myosin), showing a role of mechanosensing on tissue organization. Our data indicate the importance of substrate curvature in the formation of 3D tissues and provide insights into the emergence of chirality.
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Affiliation(s)
- Barbara Schamberger
- Department of the Chemistry and Physics of Materials, Paris-Lodron University of Salzburg, 5020 Salzburg, Austria
| | - Sebastian Ehrig
- Laboratory of Systems Biology of Gene Regulatory Elements, Berlin Institute for Medical Systems Biology, Max Delbrück Center for Molecular Medicine in the Helmholtz Association, Hannoversche Str. 28, 10115 Berlin, Germany
| | - Thomas Dechat
- Ludwig Boltzmann Institute of Osteology of OEGK and AUVA Trauma Centre Meidling, 1st Medical Department, Hanusch Hospital, 1140 Vienna, Austria
| | - Silvia Spitzer
- Ludwig Boltzmann Institute of Osteology of OEGK and AUVA Trauma Centre Meidling, 1st Medical Department, Hanusch Hospital, 1140 Vienna, Austria
| | - Cécile M Bidan
- Department of Biomaterials, Max Planck Institute of Colloids and Interfaces, 14476 Potsdam, Germany
| | - Peter Fratzl
- Department of Biomaterials, Max Planck Institute of Colloids and Interfaces, 14476 Potsdam, Germany
| | - John W C Dunlop
- Department of the Chemistry and Physics of Materials, Paris-Lodron University of Salzburg, 5020 Salzburg, Austria
| | - Andreas Roschger
- Department of the Chemistry and Physics of Materials, Paris-Lodron University of Salzburg, 5020 Salzburg, Austria
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21
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Tiwari V, Alam MJ, Bhatia M, Navya M, Banerjee SK. The structure and function of lamin A/C: Special focus on cardiomyopathy and therapeutic interventions. Life Sci 2024; 341:122489. [PMID: 38340979 DOI: 10.1016/j.lfs.2024.122489] [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: 11/11/2023] [Revised: 01/21/2024] [Accepted: 02/03/2024] [Indexed: 02/12/2024]
Abstract
Lamins are inner nuclear membrane proteins that belong to the intermediate filament family. Lamin A/C lie adjacent to the heterochromatin structure in polymer form, providing skeletal to the nucleus. Based on the localization, lamin A/C provides nuclear stability and cytoskeleton to the nucleus and modulates chromatin organization and gene expression. Besides being the structural protein making the inner nuclear membrane in polymer form, lamin A/C functions as a signalling molecule involved in gene expression as an enhancer inside the nucleus. Lamin A/C regulates various cellular pathways like autophagy and energy balance in the cytoplasm. Its expression is highly variable in differentiated tissues, higher in hard tissues like bone and muscle cells, and lower in soft tissues like the liver and brain. In muscle cells, including the heart, lamin A/C must be expressed in a balanced state. Lamin A/C mutation is linked with various diseases, such as muscular dystrophy, lipodystrophy, and cardiomyopathies. It has been observed that a good number of mutations in the LMNA gene impact cardiac activity and its function. Although several works have been published, there are still several unexplored areas left regarding the lamin A/C function and structure in the cardiovascular system and its pathological state. In this review, we focus on the structural organization, expression pattern, and function of lamin A/C, its interacting partners, and the pathophysiology associated with mutations in the lamin A/C gene, with special emphasis on cardiovascular diseases. With the recent finding on lamin A/C, we have summarized the possible therapeutic interventions to treat cardiovascular symptoms and reverse the molecular changes.
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Affiliation(s)
- Vikas Tiwari
- Department of Biotechnology, National Institute of Pharmaceutical Education and Research, Guwahati 781101, Assam, India
| | - Md Jahangir Alam
- Department of Biotechnology, National Institute of Pharmaceutical Education and Research, Guwahati 781101, Assam, India; Cell Biology and Physiology Division, CSIR-Indian Institute of Chemical Biology, Kolkata, India
| | - Madhavi Bhatia
- Department of Biotechnology, National Institute of Pharmaceutical Education and Research, Guwahati 781101, Assam, India
| | - Malladi Navya
- Department of Biotechnology, National Institute of Pharmaceutical Education and Research, Guwahati 781101, Assam, India
| | - Sanjay K Banerjee
- Department of Biotechnology, National Institute of Pharmaceutical Education and Research, Guwahati 781101, Assam, India.
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22
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Sengupta D, Sengupta K. Lamin A K97E leads to NF-κB-mediated dysfunction of inflammatory responses in dilated cardiomyopathy. Biol Cell 2024; 116:e2300094. [PMID: 38404031 DOI: 10.1111/boc.202300094] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2023] [Revised: 12/07/2023] [Accepted: 01/04/2024] [Indexed: 02/27/2024]
Abstract
BACKGROUND INFORMATION Lamins are type V intermediate filament proteins underlying the inner nuclear membrane which provide structural rigidity to the nucleus, tether the chromosomes, maintain nuclear homeostasis, and remain dynamically associated with developmentally regulated regions of the genome. A large number of mutations particularly in the LMNA gene encoding lamin A/C results in a wide array of human diseases, collectively termed as laminopathies. Dilated Cardiomyopathy (DCM) is one such laminopathic cardiovascular disease which is associated with systolic dysfunction of left or both ventricles leading to cardiac arrhythmia which ultimately culminates into myocardial infarction. RESULTS In this work, we have unraveled the epigenetic landscape to address the regulation of gene expression in mouse myoblast cell line in the context of the missense mutation LMNA 289A CONCLUSIONS We report here for the first time that there is a significant downregulation of the NF-κB pathway, which has been implicated in cardio-protection elsewhere. SIGNIFICANCE This provides a new pathophysiological explanation that correlates an LMNA mutation and dilated cardiomyopathy.
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Affiliation(s)
- Duhita Sengupta
- Biophysics and Structural Genomics Division, Saha Institute of Nuclear Physics, Kolkata, India
- Homi Bhabha National Institute (HBNI), Mumbai, India
| | - Kaushik Sengupta
- Biophysics and Structural Genomics Division, Saha Institute of Nuclear Physics, Kolkata, India
- Homi Bhabha National Institute (HBNI), Mumbai, India
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23
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Yamamoto-Hino M, Ariura M, Tanaka M, Iwasaki YW, Kawaguchi K, Shimamoto Y, Goto S. PIGB maintains nuclear lamina organization in skeletal muscle of Drosophila. J Cell Biol 2024; 223:e202301062. [PMID: 38261271 PMCID: PMC10808031 DOI: 10.1083/jcb.202301062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2023] [Revised: 10/09/2023] [Accepted: 11/17/2023] [Indexed: 01/24/2024] Open
Abstract
The nuclear lamina (NL) plays various roles and participates in nuclear integrity, chromatin organization, and transcriptional regulation. Lamin proteins, the main components of the NL, form a homogeneous meshwork structure under the nuclear envelope. Lamins are essential, but it is unknown whether their homogeneous distribution is important for nuclear function. Here, we found that PIGB, an enzyme involved in glycosylphosphatidylinositol (GPI) synthesis, is responsible for the homogeneous lamin meshwork in Drosophila. Loss of PIGB resulted in heterogeneous distributions of B-type lamin and lamin-binding proteins in larval muscles. These phenotypes were rescued by expression of PIGB lacking GPI synthesis activity. The PIGB mutant exhibited changes in lamina-associated domains that are large heterochromatic genomic regions in the NL, reduction of nuclear stiffness, and deformation of muscle fibers. These results suggest that PIGB maintains the homogeneous meshwork of the NL, which may be essential for chromatin distribution and nuclear mechanical properties.
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Affiliation(s)
- Miki Yamamoto-Hino
- Department of Life Science, College of Science, Rikkyo University, Tokyo, Japan
| | - Masaru Ariura
- Department of Molecular Biology, Keio University School of Medicine, Tokyo, Japan
| | - Masahito Tanaka
- Department of Chromosome Science, National Institute of Genetics, Mishima, Japan
| | - Yuka W. Iwasaki
- Department of Molecular Biology, Keio University School of Medicine, Tokyo, Japan
- Laboratory for Functional Non-Coding Genomics, RIKEN Center for Integrative Medical Sciences, Yokohama, Japan
- Japan Science and Technology Agency (JST), Precursory Research for Embryonic Science and Technology (PRESTO), Saitama, Japan
| | - Kohei Kawaguchi
- Department of Life Science, College of Science, Rikkyo University, Tokyo, Japan
| | - Yuta Shimamoto
- Department of Chromosome Science, National Institute of Genetics, Mishima, Japan
| | - Satoshi Goto
- Department of Life Science, College of Science, Rikkyo University, Tokyo, Japan
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24
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van Heerden D, Klima S, van den Bout I. How nuclear envelope dynamics can direct laminopathy phenotypes. Curr Opin Cell Biol 2024; 86:102290. [PMID: 38048657 DOI: 10.1016/j.ceb.2023.102290] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 10/25/2023] [Accepted: 11/09/2023] [Indexed: 12/06/2023]
Abstract
The nuclear envelope separates the genome from the cytoplasmic environment. However, the nuclear envelope is also physically associated with the genome and exerts influence on gene expression and genome modification. The nucleus is dynamic, changing shape and responding to cell movement, disassembling and assembling during cell division, and undergoing rupture and repair. These dynamics can be impacted by genetic disease, leading to a family of diseases called laminopathies. Their disparate phenotypes suggest that multiple processes are affected. We highlight three such processes here, which we believe can be used to classify most of the laminopathies. While much still needs to be learned, some commonalities between these processes, such as proteins involved in nuclear envelope formation and rupture repair, may drive a variety of laminopathies. Here we review the latest information regarding nuclear dynamics and its role in laminopathies related to mutations in the nuclear lamina and linker of nucleoskeleton and cytoskeleton complex (LINC) proteins.
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Affiliation(s)
- David van Heerden
- Department of Physiology, Faculty of Health Sciences, University of Pretoria, South Africa; Centre for Neuroendocrinology, Department of Immunology, Faculty of Health Sciences, University of Pretoria, South Africa
| | - Stefanie Klima
- Department of Physiology, Faculty of Health Sciences, University of Pretoria, South Africa; Centre for Neuroendocrinology, Department of Immunology, Faculty of Health Sciences, University of Pretoria, South Africa
| | - Iman van den Bout
- Department of Physiology, Faculty of Health Sciences, University of Pretoria, South Africa; Centre for Neuroendocrinology, Department of Immunology, Faculty of Health Sciences, University of Pretoria, South Africa.
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25
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Coulombe PA, Pineda CM, Jacob JT, Nair RR. Nuclear roles for non-lamin intermediate filament proteins. Curr Opin Cell Biol 2024; 86:102303. [PMID: 38113712 PMCID: PMC11056187 DOI: 10.1016/j.ceb.2023.102303] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2023] [Revised: 11/21/2023] [Accepted: 11/26/2023] [Indexed: 12/21/2023]
Abstract
The nuclear-localized lamins have long been thought to be the only intermediate filaments (IFs) with an impact on the architecture, properties, and functions of the nucleus. Recent studies, however, uncovered significant roles for IFs other than lamins (here referred to as "non-lamin IFs") in regulating key properties of the nucleus in various cell types and biological settings. In the cytoplasm, IFs often occur in the perinuclear space where they contribute to local stiffness and impact the shape and/or the integrity of the nucleus, particularly in cells under stress. In addition, selective non-lamin IF proteins can occur inside the nucleus where they partake in fundamental processes including nuclear architecture and chromatin organization, regulation of gene expression, cell cycle progression, and the repair of DNA damage. This text reviews the evidence supporting a role for non-lamin IF proteins in regulating various properties of the nucleus and highlights opportunities for further study.
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Affiliation(s)
- Pierre A Coulombe
- Department of Cell and Developmental Biology, University of Michigan Medical School, Ann Arbor, MI 48109, USA; Department of Dermatology, University of Michigan, Ann Arbor, MI 48109, USA; Rogel Cancer Center, University of Michigan, Ann Arbor, MI 48109, USA.
| | - Christopher M Pineda
- Department of Cell and Developmental Biology, University of Michigan Medical School, Ann Arbor, MI 48109, USA; Program in Cellular and Molecular Biology, University of Michigan Medical School, Ann Arbor, MI 48109, USA
| | - Justin T Jacob
- Public Health Laboratory Division, District of Columbia Department of Forensic Sciences, Washington, DC 20024, USA
| | - Raji R Nair
- Department of Cell and Developmental Biology, University of Michigan Medical School, Ann Arbor, MI 48109, USA
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26
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Attar AG, Paturej J, Banigan EJ, Erbas A. Chromatin phase separation and nuclear shape fluctuations are correlated in a polymer model of the nucleus. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2023.12.16.571697. [PMID: 38168411 PMCID: PMC10760070 DOI: 10.1101/2023.12.16.571697] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2024]
Abstract
Abnormalities in the shapes of mammalian cell nuclei are hallmarks of a variety of diseases, including progeria, muscular dystrophy, and various cancers. Experiments have shown that there is a causal relationship between chromatin organization and nuclear morphology. Decreases in heterochromatin levels, perturbations to heterochromatin organization, and increases in euchromatin levels all lead to misshapen nuclei, which exhibit deformations, such as nuclear blebs and nuclear ruptures. However, the polymer physical mechanisms of how chromatin governs nuclear shape and integrity are poorly understood. To investigate how heterochromatin and euchromatin, which are thought to microphase separate in vivo , govern nuclear morphology, we implemented a composite coarse-grained polymer and elastic shell model. By varying chromatin volume fraction (density), heterochromatin levels and structure, and heterochromatin-lamina interactions, we show how the spatial organization of chromatin polymer phases within the nucleus could perturb nuclear shape in some scenarios. Increasing the volume fraction of chromatin in the cell nucleus stabilizes the nuclear lamina against large fluctuations. However, surprisingly, we find that increasing heterochromatin levels or heterochromatin-lamina interactions enhances nuclear shape fluctuations in our simulations by a "wetting"-like interaction. In contrast, shape fluctuations are largely insensitive to the internal structure of the heterochromatin, such as the presence or absence of chromatin-chromatin crosslinks. Therefore, our simulations suggest that heterochromatin accumulation at the nuclear periphery could perturb nuclear morphology in a nucleus or nuclear region that is sufficiently soft, while stabilization of the nucleus via heterochromatin likely occurs through mechanisms other than chromatin microphase organization.
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27
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Cenni V, Evangelisti C, Santi S, Sabatelli P, Neri S, Cavallo M, Lattanzi G, Mattioli E. Desmin and Plectin Recruitment to the Nucleus and Nuclei Orientation Are Lost in Emery-Dreifuss Muscular Dystrophy Myoblasts Subjected to Mechanical Stimulation. Cells 2024; 13:162. [PMID: 38247853 PMCID: PMC10814836 DOI: 10.3390/cells13020162] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2023] [Revised: 01/08/2024] [Accepted: 01/11/2024] [Indexed: 01/23/2024] Open
Abstract
In muscle cells subjected to mechanical stimulation, LINC complex and cytoskeletal proteins are basic to preserve cellular architecture and maintain nuclei orientation and positioning. In this context, the role of lamin A/C remains mostly elusive. This study demonstrates that in human myoblasts subjected to mechanical stretching, lamin A/C recruits desmin and plectin to the nuclear periphery, allowing a proper spatial orientation of the nuclei. Interestingly, in Emery-Dreifuss Muscular Dystrophy (EDMD2) myoblasts exposed to mechanical stretching, the recruitment of desmin and plectin to the nucleus and nuclear orientation were impaired, suggesting that a functional lamin A/C is crucial for the response to mechanical strain. While describing a new mechanism of action headed by lamin A/C, these findings show a structural alteration that could be involved in the onset of the muscle defects observed in muscular laminopathies.
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Affiliation(s)
- Vittoria Cenni
- CNR Institute of Molecular Genetics “Luigi Luca Cavalli-Sforza”, Unit of Bologna, 40136 Bologna, Italy; (V.C.); (S.S.); (P.S.)
- IRCCS Istituto Ortopedico Rizzoli, 40136 Bologna, Italy
| | - Camilla Evangelisti
- Cellular Signalling Laboratory, Department of Biochemical and Neuromotor Sciences, Alma Mater Studiorum, University of Bologna, 40138 Bologna, Italy;
| | - Spartaco Santi
- CNR Institute of Molecular Genetics “Luigi Luca Cavalli-Sforza”, Unit of Bologna, 40136 Bologna, Italy; (V.C.); (S.S.); (P.S.)
- IRCCS Istituto Ortopedico Rizzoli, 40136 Bologna, Italy
| | - Patrizia Sabatelli
- CNR Institute of Molecular Genetics “Luigi Luca Cavalli-Sforza”, Unit of Bologna, 40136 Bologna, Italy; (V.C.); (S.S.); (P.S.)
- IRCCS Istituto Ortopedico Rizzoli, 40136 Bologna, Italy
| | - Simona Neri
- Medicine and Rheumatology Unit, IRCCS Istituto Ortopedico Rizzoli, 40136 Bologna, Italy;
| | - Marco Cavallo
- Shoulder-Elbow Surgery Unit, IRCCS Istituto Ortopedico Rizzoli, 40136 Bologna, Italy;
| | - Giovanna Lattanzi
- CNR Institute of Molecular Genetics “Luigi Luca Cavalli-Sforza”, Unit of Bologna, 40136 Bologna, Italy; (V.C.); (S.S.); (P.S.)
- IRCCS Istituto Ortopedico Rizzoli, 40136 Bologna, Italy
| | - Elisabetta Mattioli
- CNR Institute of Molecular Genetics “Luigi Luca Cavalli-Sforza”, Unit of Bologna, 40136 Bologna, Italy; (V.C.); (S.S.); (P.S.)
- IRCCS Istituto Ortopedico Rizzoli, 40136 Bologna, Italy
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28
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Odell J, Gräf R, Lammerding J. Heterologous expression of Dictyostelium discoideum NE81 in mouse embryo fibroblasts reveals conserved mechanoprotective roles of lamins. Mol Biol Cell 2024; 35:ar7. [PMID: 37910203 PMCID: PMC10881167 DOI: 10.1091/mbc.e23-05-0193] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Revised: 10/24/2023] [Accepted: 10/24/2023] [Indexed: 11/03/2023] Open
Abstract
Lamins are nuclear intermediate filament proteins that are ubiquitously found in metazoan cells, where they contribute to nuclear morphology, stability, and gene expression. Lamin-like sequences have recently been identified in distantly related eukaryotes, but it remains unclear whether these proteins share conserved functions with the lamins found in metazoans. Here, we investigate conserved features between metazoan and amoebozoan lamins using a genetic complementation system to express the Dictyostelium discoideum lamin-like protein NE81 in mammalian cells lacking either specific lamins or all endogenous lamins. We report that NE81 localizes to the nucleus in cells lacking Lamin A/C, and that NE81 expression improves nuclear circularity, reduces nuclear deformability, and prevents nuclear envelope rupture in these cells. However, NE81 did not completely rescue loss of Lamin A/C, and was unable to restore normal distribution of metazoan lamin interactors, such as emerin and nuclear pore complexes, which are frequently displaced in Lamin A/C deficient cells. Collectively, our results indicate that the ability of lamins to modulate the morphology and mechanical properties of nuclei may have been a feature present in the common ancestor of Dictyostelium and animals, whereas other, more specialized interactions may have evolved more recently in metazoan lineages.
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Affiliation(s)
- Jacob Odell
- Weill Institute for Cell and Molecular Biology, Cornell University, Ithaca, NY 14853
- Graduate Field of Biochemistry, Molecular and Cell Biology, Cornell University, Ithaca, NY 14853
| | - Ralph Gräf
- Department of Cell Biology, University of Potsdam, 14476 Potsdam-Golm, Germany
| | - Jan Lammerding
- Weill Institute for Cell and Molecular Biology, Cornell University, Ithaca, NY 14853
- Meinig School of Biomedical Engineering, Cornell University, Ithaca, NY 14853
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29
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Liu H, Liu X, Luo S, Ma R, Ge W, Meng S, Gao Y. Lamin A/C mediates microglial activation by modulating cell proliferation and immune response. J Neurosci Res 2024; 102:e25263. [PMID: 38284866 DOI: 10.1002/jnr.25263] [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: 08/06/2023] [Accepted: 10/01/2023] [Indexed: 01/30/2024]
Abstract
Lamin A/C is involved in macrophage activation and premature aging, also known as progeria. As the resident macrophage in brain, overactivation of microglia causes brain inflammation, promoting aging and brain disease. In this study, we investigated the role of Lamin A/C in microglial activation and its impact on progeria using Lmna-/- mice, primary microglia, Lmna knockout (Lmna-KO) and Lmna-knockdown (Lmna-KD) BV2 cell lines. We found that the microglial activation signatures, including cell proliferation, morphology changes, and proinflammatory cytokine secretion (IL-1β, IL-6, and TNF-α), were significantly suppressed in all Lamin A/C-deficient models when stimulated with LPS. TMT-based quantitative proteomic and bioinformatic analysis were further applied to explore the mechanism of Lamin A/C-regulated microglia activation from the proteome level. The results revealed that immune response and phagocytosis were impaired in Lmna-/- microglia. Stat1 was identified as the hub protein in the mechanism by which Lamin A/C regulates microglial activation. Additionally, DNA replication, chromatin organization, and mRNA processing were also altered by Lamin A/C, with Ki67 fulfilling the main hub function. Lamin A/C is a mechanosensitive protein and, the immune- and proliferation-related biological processes are also regulated by mechanotransduction. We speculate that Lamin A/C-mediated mechanotransduction is required for microglial activation. Our study proposes a novel mechanism for microglial activation mediated by Lamin A/C.
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Affiliation(s)
- Haotian Liu
- Key Laboratory of Novel Targets and Drug Study for Neural Repair of Zhejiang Province, School of Medicine, Hangzhou City University, Hangzhou, China
- Department of Immunology, Institute of Basic Medical Sciences Chinese Academy of Medical Sciences, School of Basic Medicine Peking Union Medical College, Beijing, China
| | - Xinnan Liu
- Department of Immunology, Institute of Basic Medical Sciences Chinese Academy of Medical Sciences, School of Basic Medicine Peking Union Medical College, Beijing, China
| | - Shiqi Luo
- Department of Immunology, Institute of Basic Medical Sciences Chinese Academy of Medical Sciences, School of Basic Medicine Peking Union Medical College, Beijing, China
| | - Rayna Ma
- Department of Immunology, Institute of Basic Medical Sciences Chinese Academy of Medical Sciences, School of Basic Medicine Peking Union Medical College, Beijing, China
| | - Wei Ge
- Department of Immunology, Institute of Basic Medical Sciences Chinese Academy of Medical Sciences, School of Basic Medicine Peking Union Medical College, Beijing, China
| | - Shu Meng
- Department of Immunology, Institute of Basic Medical Sciences Chinese Academy of Medical Sciences, School of Basic Medicine Peking Union Medical College, Beijing, China
| | - Yanpan Gao
- Key Laboratory of Novel Targets and Drug Study for Neural Repair of Zhejiang Province, School of Medicine, Hangzhou City University, Hangzhou, China
- Department of Immunology, Institute of Basic Medical Sciences Chinese Academy of Medical Sciences, School of Basic Medicine Peking Union Medical College, Beijing, China
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30
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Hadpech S, Peerapen P, Thongboonkerd V. The upregulation of lamin A/C as a compensatory mechanism during tight junction disruption in renal tubular cells mediated by calcium oxalate crystals. Curr Res Toxicol 2023; 6:100145. [PMID: 38193033 PMCID: PMC10772403 DOI: 10.1016/j.crtox.2023.100145] [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: 07/16/2023] [Revised: 11/12/2023] [Accepted: 12/13/2023] [Indexed: 01/10/2024] Open
Abstract
Calcium oxalate monohydrate (COM), the most important crystal causing kidney stone disease, upregulates lamin A/C but downregulates zonula occludens-1 (ZO-1) in renal tubular cells. While roles for F-actin and α-tubulin and their association with ZO-1 are known to regulate COM-mediated tight junction (TJ) disruption, roles of lamin A/C and its interplay with ZO-1 in COM kidney stone model remain unclear and are thus the objectives of this study. Lamin A/C was knocked down in MDCK cells by silencing RNA specific for LMNA (siLMNA). Both wild-type (WT) and siLMNA cells were treated with COM for 48-h compared with the untreated (control) cells. Western blotting and immunofluorescence staining revealed upregulated lamin A/C and downregulated ZO-1 in the COM-treated WT cells. siLMNA successfully reduced lamin A/C expression in both control and COM-treated cells. Nonetheless, siLMNA did not reverse the effect of COM on the decreases in ZO-1 and transepithelial resistance, but further reduced their levels in both control and COM-treated cells. Protein-protein interaction analysis demonstrated that two cytoskeletal proteins (actin and tubulin) served as the linkers to connect lamin A/C with ZO-1 and occludin (both of which are the TJ proteins). Altogether, these data implicate that lamin A/C and ZO-1 are indirectly associated to control TJ function, and ZO-1 expression is regulated by lamin A/C. Moreover, COM-induced upregulation of lamin A/C most likely serves as a compensatory mechanism to cope with the downregulation of ZO-1 during COM-mediated TJ disruption.
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Affiliation(s)
- Sudarat Hadpech
- Medical Proteomics Unit, Research Department, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok 10700, Thailand
| | - Paleerath Peerapen
- Medical Proteomics Unit, Research Department, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok 10700, Thailand
| | - Visith Thongboonkerd
- Medical Proteomics Unit, Research Department, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok 10700, Thailand
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31
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Pancheri NM, Daw JT, Ditton D, Schiele NR, Birks S, Uzer G, Jones CL, Penney BT, Theodossiou SK. The LINC complex regulates Achilles tendon elastic modulus, Achilles and tail tendon collagen crimp, and Achilles and tail tendon lateral expansion during early postnatal development. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.11.13.566892. [PMID: 38014288 PMCID: PMC10680625 DOI: 10.1101/2023.11.13.566892] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2023]
Abstract
There is limited understanding of how mechanical signals regulate tendon development. The nucleus has emerged as a major regulator of cellular mechanosensation, via the linker of nucleoskeleton and cytoskeleton (LINC) protein complex. Specific roles of LINC in tenogenesis have not been explored. In this study, we investigate how LINC regulates tendon development by disabling LINC-mediated mechanosensing via dominant negative (dn) expression of the Klarsicht, ANC-1, and Syne Homology (KASH) domain, which is necessary for LINC to function. We hypothesized that LINC regulates mechanotransduction in developing tendon, and that disabling LINC would impact tendon mechanical properties and structure in a mouse model of dnKASH. We used Achilles (AT) and tail (TT) tendons as representative energy-storing and limb-positioning tendons, respectively. Mechanical testing at postnatal day 10 showed that disabling the LINC complex via dnKASH significantly impacted tendon mechanical properties and cross-sectional area, and that effects differed between ATs and TTs. Collagen crimp distance was also impacted in dnKASH tendons, and was significantly decreased in ATs, and increased in TTs. Overall, we show that disruption to the LINC complex specifically impacts tendon mechanics and collagen crimp structure, with unique responses between an energy-storing and limb-positioning tendon. This suggests that nuclear mechanotransduction through LINC plays a role in regulating tendon formation during neonatal development.
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32
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Jebane C, Varlet AA, Karnat M, Hernandez- Cedillo LM, Lecchi A, Bedu F, Desgrouas C, Vigouroux C, Vantyghem MC, Viallat A, Rupprecht JF, Helfer E, Badens C. Enhanced cell viscosity: A new phenotype associated with lamin A/C alterations. iScience 2023; 26:107714. [PMID: 37701573 PMCID: PMC10494210 DOI: 10.1016/j.isci.2023.107714] [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: 05/03/2023] [Revised: 07/13/2023] [Accepted: 08/22/2023] [Indexed: 09/14/2023] Open
Abstract
Lamin A/C is a well-established key contributor to nuclear stiffness and its role in nucleus mechanical properties has been extensively studied. However, its impact on whole-cell mechanics has been poorly addressed, particularly concerning measurable physical parameters. In this study, we combined microfluidic experiments with theoretical analyses to quantitatively estimate the whole-cell mechanical properties. This allowed us to characterize the mechanical changes induced in cells by lamin A/C alterations and prelamin A accumulation resulting from atazanavir treatment or lipodystrophy-associated LMNA R482W pathogenic variant. Our results reveal a distinctive increase in long-time viscosity as a signature of cells affected by lamin A/C alterations. Furthermore, they show that the whole-cell response to mechanical stress is driven not only by the nucleus but also by the nucleo-cytoskeleton links and the microtubule network. The enhanced cell viscosity assessed with our microfluidic assay could serve as a valuable diagnosis marker for lamin-related diseases.
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Affiliation(s)
- Cécile Jebane
- Aix Marseille Univ, CNRS, CINAM, Turing Centre for Living Systems, Marseille, France
| | | | - Marc Karnat
- Aix Marseille Univ, Université de Toulon, CNRS, CPT, Turing Centre for Living Systems, Marseille, France
| | | | | | | | | | - Corinne Vigouroux
- Assistance Publique–Hôpitaux de Paris (AP-HP), Saint-Antoine Hospital, National Reference Centre for Rares diseases of Insulin-Secretion and Insulin-Sensitivity (PRISIS), Department of Endocrinology, Paris, France
- Sorbonne University, Saint-Antoine Research Centre, Inserm UMR_S938, Institute of Cardiometabolism and Nutrition, Paris, France
| | - Marie-Christine Vantyghem
- Endocrinology, Diabetology and Metabolism Department, Inserm U1190, EGID, Lille University Hospital, Lille, France
| | - Annie Viallat
- Aix Marseille Univ, CNRS, CINAM, Turing Centre for Living Systems, Marseille, France
| | - Jean-François Rupprecht
- Aix Marseille Univ, Université de Toulon, CNRS, CPT, Turing Centre for Living Systems, Marseille, France
| | - Emmanuèle Helfer
- Aix Marseille Univ, CNRS, CINAM, Turing Centre for Living Systems, Marseille, France
| | - Catherine Badens
- Aix Marseille Univ, INSERM, MMG, Marseille, France
- AP-HM, Laboratoire de Biochimie, Marseille, France
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33
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Odell J, Gräf R, Lammerding J. Heterologous expression of Dictyostelium discoideum NE81 in mouse embryo fibroblasts reveals conserved mechanoprotective roles of lamins. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.05.31.543154. [PMID: 37398420 PMCID: PMC10312578 DOI: 10.1101/2023.05.31.543154] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/04/2023]
Abstract
Lamins are nuclear intermediate filament proteins that are ubiquitously found in metazoan cells, where they contribute to nuclear morphology, stability, and gene expression. Lamin-like sequences have recently been identified in distantly related eukaryotes, but it remains unclear if these proteins share conserved functions with the lamins found in metazoans. Here, we investigate conserved features between metazoan and amoebozoan lamins using a genetic complementation system to express the Dictyostelium discoideum lamin-like protein NE81 in mammalian cells lacking either specific lamins or all endogenous lamins. We report that NE81 localizes to the nucleus in cells lacking Lamin A/C, and that NE81 expression improves nuclear circularity, reduces nuclear deformability, and prevents nuclear envelope rupture in these cells. However, NE81 did not completely rescue loss of Lamin A/C, and was unable to restore normal distribution of metazoan lamin interactors, such as emerin and nuclear pore complexes, which are frequently displaced in Lamin A/C deficient cells. Collectively, our results indicate that the ability of lamins to modulate the morphology and mechanical properties of nuclei may have been a feature present in the common ancestor of Dictyostelium and animals, whereas other, more specialized interactions may have evolved more recently in metazoan lineages.
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34
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Brown SJ, Šoltić D, Synowsky SA, Shirran SL, Chilcott E, Shorrock HK, Gillingwater TH, Yáñez-Muñoz RJ, Schneider B, Bowerman M, Fuller HR. AAV9-mediated SMN gene therapy rescues cardiac desmin but not lamin A/C and elastin dysregulation in Smn2B/- spinal muscular atrophy mice. Hum Mol Genet 2023; 32:2950-2965. [PMID: 37498175 PMCID: PMC10549791 DOI: 10.1093/hmg/ddad121] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2023] [Revised: 06/27/2023] [Accepted: 07/25/2023] [Indexed: 07/28/2023] Open
Abstract
Structural, functional and molecular cardiac defects have been reported in spinal muscular atrophy (SMA) patients and mouse models. Previous quantitative proteomics analyses demonstrated widespread molecular defects in the severe Taiwanese SMA mouse model. Whether such changes are conserved across different mouse models, including less severe forms of the disease, has yet to be established. Here, using the same high-resolution proteomics approach in the less-severe Smn2B/- SMA mouse model, 277 proteins were found to be differentially abundant at a symptomatic timepoint (post-natal day (P) 18), 50 of which were similarly dysregulated in severe Taiwanese SMA mice. Bioinformatics analysis linked many of the differentially abundant proteins to cardiovascular development and function, with intermediate filaments highlighted as an enriched cellular compartment in both datasets. Lamin A/C was increased in the cardiac tissue, whereas another intermediate filament protein, desmin, was reduced. The extracellular matrix (ECM) protein, elastin, was also robustly decreased in the heart of Smn2B/- mice. AAV9-SMN1-mediated gene therapy rectified low levels of survival motor neuron protein and restored desmin levels in heart tissues of Smn2B/- mice. In contrast, AAV9-SMN1 therapy failed to correct lamin A/C or elastin levels. Intermediate filament proteins and the ECM have key roles in cardiac function and their dysregulation may explain cardiac impairment in SMA, especially since mutations in genes encoding these proteins cause other diseases with cardiac aberration. Cardiac pathology may need to be considered in the long-term care of SMA patients, as it is unclear whether currently available treatments can fully rescue peripheral pathology in SMA.
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Affiliation(s)
- Sharon J Brown
- School of Pharmacy and Bioengineering, Keele University, Keele ST5 5BG, UK
- Wolfson Centre for Inherited Neuromuscular Disease, TORCH Building, RJAH Orthopaedic Hospital, Oswestry SY10 7AG, UK
| | - Darija Šoltić
- School of Pharmacy and Bioengineering, Keele University, Keele ST5 5BG, UK
- Wolfson Centre for Inherited Neuromuscular Disease, TORCH Building, RJAH Orthopaedic Hospital, Oswestry SY10 7AG, UK
| | - Silvia A Synowsky
- BSRC Mass Spectrometry and Proteomics Facility, University of St Andrews, St Andrews KY16 9ST, UK
| | - Sally L Shirran
- BSRC Mass Spectrometry and Proteomics Facility, University of St Andrews, St Andrews KY16 9ST, UK
| | - Ellie Chilcott
- AGCTlab.org, Centre of Gene and Cell Therapy, Centre for Biomedical Sciences, Department of Biological Sciences, School of Life Sciences and the Environment, Royal Holloway University of London, Egham Hill, Egham, Surrey TW20 0EX, UK
| | - Hannah K Shorrock
- Edinburgh Medical School: Biomedical Sciences, Euan MacDonald Centre for Motor Neurone Disease Research, University of Edinburgh, Edinburgh EH8 9XD, UK
| | - Thomas H Gillingwater
- Edinburgh Medical School: Biomedical Sciences, Euan MacDonald Centre for Motor Neurone Disease Research, University of Edinburgh, Edinburgh EH8 9XD, UK
| | - Rafael J Yáñez-Muñoz
- AGCTlab.org, Centre of Gene and Cell Therapy, Centre for Biomedical Sciences, Department of Biological Sciences, School of Life Sciences and the Environment, Royal Holloway University of London, Egham Hill, Egham, Surrey TW20 0EX, UK
| | - Bernard Schneider
- Bertarelli Platform for Gene Therapy, Ecole Polytechnique Fédérale de Lausanne (EPFL), 1202 Geneva, Switzerland
- Brain Mind Institute, Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland
| | - Melissa Bowerman
- Wolfson Centre for Inherited Neuromuscular Disease, TORCH Building, RJAH Orthopaedic Hospital, Oswestry SY10 7AG, UK
- School of Medicine, Keele University, Keele ST5 5BG, UK
| | - Heidi R Fuller
- School of Pharmacy and Bioengineering, Keele University, Keele ST5 5BG, UK
- Wolfson Centre for Inherited Neuromuscular Disease, TORCH Building, RJAH Orthopaedic Hospital, Oswestry SY10 7AG, UK
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35
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Bastianello G, Foiani M. Mechanisms controlling the mechanical properties of the nuclei. Curr Opin Cell Biol 2023; 84:102222. [PMID: 37619290 DOI: 10.1016/j.ceb.2023.102222] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2023] [Revised: 07/28/2023] [Accepted: 07/29/2023] [Indexed: 08/26/2023]
Abstract
The mechanical properties of the nucleus influence different cellular and nuclear functions and have relevant implications for several human diseases. The nucleus protects genetic information while acting as a mechano-sensory hub in response to internal and external forces. Cells have evolved mechano-transduction signaling to respond to physical cellular and nuclear perturbations and adopted a multitude of molecular pathways to maintain nuclear shape stability and prevent morphological abnormalities of the nucleus. Here we describe those key biological processes that control nuclear mechanics and discuss emerging perspectives on the mechanobiology of the nucleus as a diagnostic tool and clinical target.
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Affiliation(s)
- Giulia Bastianello
- IFOM, The FIRC Institute of Molecular Oncology, Milan 20139, Italy; Oncology and Haemato-Oncology Department, University of Milan, Milan 20122, Italy.
| | - Marco Foiani
- IFOM, The FIRC Institute of Molecular Oncology, Milan 20139, Italy; Oncology and Haemato-Oncology Department, University of Milan, Milan 20122, Italy.
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36
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Blunt EL, Choi J, Sussman H, Christopherson RC, Keen P, Rahmati Ishka M, Li LY, Idrovo JM, Julkowska MM, Van Eck J, Richards EJ. The nuclear lamina is required for proper development and nuclear shape distortion in tomato. JOURNAL OF EXPERIMENTAL BOTANY 2023; 74:5500-5513. [PMID: 37503569 PMCID: PMC10540737 DOI: 10.1093/jxb/erad294] [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: 03/11/2023] [Accepted: 07/27/2023] [Indexed: 07/29/2023]
Abstract
The nuclear lamina in plant cells is composed of plant-specific proteins, including nuclear matrix constituent proteins (NMCPs), which have been postulated to be functional analogs of lamin proteins that provide structural integrity to the organelle and help stabilize the three-dimensional organization of the genome. Using genomic editing, we generated alleles for the three genes encoding NMCPs in cultivated tomato (Solanum lycopersicum) to determine if the consequences of perturbing the nuclear lamina in this crop species were similar to or distinct from those observed in the model Arabidopsis thaliana. Loss of the sole NMCP2-class protein was lethal in tomato but is tolerated in Arabidopsis. Moreover, depletion of NMCP1-type nuclear lamina proteins leads to distinct developmental phenotypes in tomato, including leaf morphology defects and reduced root growth rate (in nmcp1b mutants), compared with cognate mutants in Arabidopsis. These findings suggest that the nuclear lamina interfaces with different developmental and signaling pathways in tomato compared with Arabidopsis. At the subcellular level, however, tomato nmcp mutants resembled their Arabidopsis counterparts in displaying smaller and more spherical nuclei in differentiated cells. This result argues that the plant nuclear lamina facilitates nuclear shape distortion in response to forces exerted on the organelle within the cell.
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Affiliation(s)
- Endia L Blunt
- The Boyce Thompson Institute, 533 Tower Road, Ithaca, NY 14853, USA
| | - Junsik Choi
- The Boyce Thompson Institute, 533 Tower Road, Ithaca, NY 14853, USA
| | - Hayley Sussman
- The Boyce Thompson Institute, 533 Tower Road, Ithaca, NY 14853, USA
| | | | - Patricia Keen
- The Boyce Thompson Institute, 533 Tower Road, Ithaca, NY 14853, USA
| | | | - Linda Y Li
- The Boyce Thompson Institute, 533 Tower Road, Ithaca, NY 14853, USA
| | - Joanna M Idrovo
- The Boyce Thompson Institute, 533 Tower Road, Ithaca, NY 14853, USA
| | | | - Joyce Van Eck
- The Boyce Thompson Institute, 533 Tower Road, Ithaca, NY 14853, USA
| | - Eric J Richards
- The Boyce Thompson Institute, 533 Tower Road, Ithaca, NY 14853, USA
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37
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Ross JA, Arcos-Villacis N, Battey E, Boogerd C, Orellana CA, Marhuenda E, Swiatlowska P, Hodzic D, Prin F, Mohun T, Catibog N, Tapia O, Gerace L, Iskratsch T, Shah AM, Stroud MJ. Lem2 is essential for cardiac development by maintaining nuclear integrity. Cardiovasc Res 2023; 119:2074-2088. [PMID: 37067297 PMCID: PMC10478753 DOI: 10.1093/cvr/cvad061] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/01/2022] [Revised: 01/19/2023] [Accepted: 02/08/2023] [Indexed: 04/18/2023] Open
Abstract
AIMS Nuclear envelope integrity is essential for the compartmentalization of the nucleus and cytoplasm. Importantly, mutations in genes encoding nuclear envelope (NE) and associated proteins are the second highest cause of familial dilated cardiomyopathy. One such NE protein that causes cardiomyopathy in humans and affects mouse heart development is Lem2. However, its role in the heart remains poorly understood. METHODS AND RESULTS We generated mice in which Lem2 was specifically ablated either in embryonic cardiomyocytes (Lem2 cKO) or in adult cardiomyocytes (Lem2 iCKO) and carried out detailed physiological, tissue, and cellular analyses. High-resolution episcopic microscopy was used for three-dimensional reconstructions and detailed morphological analyses. RNA-sequencing and immunofluorescence identified altered pathways and cellular phenotypes, and cardiomyocytes were isolated to interrogate nuclear integrity in more detail. In addition, echocardiography provided a physiological assessment of Lem2 iCKO adult mice. We found that Lem2 was essential for cardiac development, and hearts from Lem2 cKO mice were morphologically and transcriptionally underdeveloped. Lem2 cKO hearts displayed high levels of DNA damage, nuclear rupture, and apoptosis. Crucially, we found that these defects were driven by muscle contraction as they were ameliorated by inhibiting myosin contraction and L-type calcium channels. Conversely, reducing Lem2 levels to ∼45% in adult cardiomyocytes did not lead to overt cardiac dysfunction up to 18 months of age. CONCLUSIONS Our data suggest that Lem2 is critical for integrity at the nascent NE in foetal hearts, and protects the nucleus from the mechanical forces of muscle contraction. In contrast, the adult heart is not detectably affected by partial Lem2 depletion, perhaps owing to a more established NE and increased adaptation to mechanical stress. Taken together, these data provide insights into mechanisms underlying cardiomyopathy in patients with mutations in Lem2 and cardio-laminopathies in general.
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Affiliation(s)
- Jacob A Ross
- British Heart Foundation Centre of Research Excellence, School of Cardiovascular & Metabolic Medicine & Sciences, Faculty of Life Sciences & Medicine, King’s College London, James Black Centre, 125 Coldharbour Lane, London SE5 9NU, UK
| | - Nathaly Arcos-Villacis
- British Heart Foundation Centre of Research Excellence, School of Cardiovascular & Metabolic Medicine & Sciences, Faculty of Life Sciences & Medicine, King’s College London, James Black Centre, 125 Coldharbour Lane, London SE5 9NU, UK
| | - Edmund Battey
- British Heart Foundation Centre of Research Excellence, School of Cardiovascular & Metabolic Medicine & Sciences, Faculty of Life Sciences & Medicine, King’s College London, James Black Centre, 125 Coldharbour Lane, London SE5 9NU, UK
- Centre of Human and Applied Physiological Sciences, School of Basic and Medical Biosciences, Faculty of Life Sciences and Medicine, King’s College London, London SE1 1UL, UK
| | - Cornelis Boogerd
- Hubrecht Institute, Royal Netherlands Academy of Arts and Sciences (KNAW), University Medical Center Utrecht, Utrecht 3584 CT, The Netherlands
| | - Constanza Avalos Orellana
- British Heart Foundation Centre of Research Excellence, School of Cardiovascular & Metabolic Medicine & Sciences, Faculty of Life Sciences & Medicine, King’s College London, James Black Centre, 125 Coldharbour Lane, London SE5 9NU, UK
| | - Emilie Marhuenda
- Division of Bioengineering, School of Engineering and Materials Science, Queen Mary University of London, London E1 4NS, UK
| | - Pamela Swiatlowska
- Division of Bioengineering, School of Engineering and Materials Science, Queen Mary University of London, London E1 4NS, UK
| | - Didier Hodzic
- Department of Developmental Biology, Washington University School of Medicine, 660S. Euclid Avenue, St Louis, MO 63110, USA
| | - Fabrice Prin
- Crick Advanced Light Microscopy Facility, The Francis Crick Institute, London NW1 1AT, UK
| | - Tim Mohun
- Crick Advanced Light Microscopy Facility, The Francis Crick Institute, London NW1 1AT, UK
| | - Norman Catibog
- British Heart Foundation Centre of Research Excellence, School of Cardiovascular & Metabolic Medicine & Sciences, Faculty of Life Sciences & Medicine, King’s College London, James Black Centre, 125 Coldharbour Lane, London SE5 9NU, UK
| | - Olga Tapia
- Department of Molecular Medicine, The Scripps Research Institute, La Jolla, CA 92037, USA
- Research Group on Foods, Nutritional Biochemistry and Health, Universidad Europea del Atlántico, Santander 39011, Spain
- Department of Basic Medical Sciences, Institute of Biomedical Technologies, University of La Laguna, Tenerife 38200, Spain
| | - Larry Gerace
- Department of Molecular Medicine, The Scripps Research Institute, La Jolla, CA 92037, USA
| | - Thomas Iskratsch
- Division of Bioengineering, School of Engineering and Materials Science, Queen Mary University of London, London E1 4NS, UK
| | - Ajay M Shah
- British Heart Foundation Centre of Research Excellence, School of Cardiovascular & Metabolic Medicine & Sciences, Faculty of Life Sciences & Medicine, King’s College London, James Black Centre, 125 Coldharbour Lane, London SE5 9NU, UK
| | - Matthew J Stroud
- British Heart Foundation Centre of Research Excellence, School of Cardiovascular & Metabolic Medicine & Sciences, Faculty of Life Sciences & Medicine, King’s College London, James Black Centre, 125 Coldharbour Lane, London SE5 9NU, UK
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Donnaloja F, Raimondi MT, Messa L, Barzaghini B, Carnevali F, Colombo E, Mazza D, Martinelli C, Boeri L, Rey F, Cereda C, Osellame R, Cerullo G, Carelli S, Soncini M, Jacchetti E. 3D photopolymerized microstructured scaffolds influence nuclear deformation, nucleo/cytoskeletal protein organization, and gene regulation in mesenchymal stem cells. APL Bioeng 2023; 7:036112. [PMID: 37692376 PMCID: PMC10491463 DOI: 10.1063/5.0153215] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2023] [Accepted: 08/21/2023] [Indexed: 09/12/2023] Open
Abstract
Mechanical stimuli from the extracellular environment affect cell morphology and functionality. Recently, we reported that mesenchymal stem cells (MSCs) grown in a custom-made 3D microscaffold, the Nichoid, are able to express higher levels of stemness markers. In fact, the Nichoid is an interesting device for autologous MSC expansion in clinical translation and would appear to regulate gene activity by altering intracellular force transmission. To corroborate this hypothesis, we investigated mechanotransduction-related nuclear mechanisms, and we also treated spread cells with a drug that destroys the actin cytoskeleton. We observed a roundish nuclear shape in MSCs cultured in the Nichoid and correlated the nuclear curvature with the import of transcription factors. We observed a more homogeneous euchromatin distribution in cells cultured in the Nichoid with respect to the Flat sample, corresponding to a standard glass coverslip. These results suggest a different gene regulation, which we confirmed by an RNA-seq analysis that revealed the dysregulation of 1843 genes. We also observed a low structured lamina mesh, which, according to the implemented molecular dynamic simulations, indicates reduced damping activity, thus supporting the hypothesis of low intracellular force transmission. Also, our investigations regarding lamin expression and spatial organization support the hypothesis that the gene dysregulation induced by the Nichoid is mainly related to a reduction in force transmission. In conclusion, our findings revealing the Nichoid's effects on MSC behavior is a step forward in the control of stem cells via mechanical manipulation, thus paving the way to new strategies for MSC translation to clinical applications.
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Affiliation(s)
- Francesca Donnaloja
- Department of Chemistry, Materials and Chemical Engineering “Giulio Natta,” Politecnico di Milano, Milan, Italy
| | - Manuela Teresa Raimondi
- Department of Chemistry, Materials and Chemical Engineering “Giulio Natta,” Politecnico di Milano, Milan, Italy
| | | | - Bianca Barzaghini
- Department of Chemistry, Materials and Chemical Engineering “Giulio Natta,” Politecnico di Milano, Milan, Italy
| | - Federica Carnevali
- Department of Chemistry, Materials and Chemical Engineering “Giulio Natta,” Politecnico di Milano, Milan, Italy
| | | | - Davide Mazza
- Istituto Scientifico Ospedale San Raffaele, Centro di Imaging Sperimentale, Milan, Italy
| | - Chiara Martinelli
- Department of Chemistry, Materials and Chemical Engineering “Giulio Natta,” Politecnico di Milano, Milan, Italy
| | - Lucia Boeri
- Department of Chemistry, Materials and Chemical Engineering “Giulio Natta,” Politecnico di Milano, Milan, Italy
| | - Federica Rey
- Pediatric Research Center “Romeo ed Enrica Invernizzi,” Department of Biomedical and Clinical Sciences, University of Milan, Milan, Italy
| | - Cristina Cereda
- Center of Functional Genomic and Rare Diseases, “V. Buzzi” Children's Hospital, 20154 Milan, Italy
| | - Roberto Osellame
- Institute for Photonics and Nanotechnologies—CNR, and Physics Department, Politecnico di Milano, Milan, Italy
| | - Giulio Cerullo
- Institute for Photonics and Nanotechnologies—CNR, and Physics Department, Politecnico di Milano, Milan, Italy
| | | | - Monica Soncini
- Department of Electronics, Information and Bioengineering, Politecnico di Milano, Milan, Italy
| | - Emanuela Jacchetti
- Department of Chemistry, Materials and Chemical Engineering “Giulio Natta,” Politecnico di Milano, Milan, Italy
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Coscarella IL, Landim-Vieira M, Rastegarpouyani H, Chase PB, Irianto J, Pinto JR. Nucleus Mechanosensing in Cardiomyocytes. Int J Mol Sci 2023; 24:13341. [PMID: 37686151 PMCID: PMC10487505 DOI: 10.3390/ijms241713341] [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: 07/14/2023] [Revised: 08/20/2023] [Accepted: 08/22/2023] [Indexed: 09/10/2023] Open
Abstract
Cardiac muscle contraction is distinct from the contraction of other muscle types. The heart continuously undergoes contraction-relaxation cycles throughout an animal's lifespan. It must respond to constantly varying physical and energetic burdens over the short term on a beat-to-beat basis and relies on different mechanisms over the long term. Muscle contractility is based on actin and myosin interactions that are regulated by cytoplasmic calcium ions. Genetic variants of sarcomeric proteins can lead to the pathophysiological development of cardiac dysfunction. The sarcomere is physically connected to other cytoskeletal components. Actin filaments, microtubules and desmin proteins are responsible for these interactions. Therefore, mechanical as well as biochemical signals from sarcomeric contractions are transmitted to and sensed by other parts of the cardiomyocyte, particularly the nucleus which can respond to these stimuli. Proteins anchored to the nuclear envelope display a broad response which remodels the structure of the nucleus. In this review, we examine the central aspects of mechanotransduction in the cardiomyocyte where the transmission of mechanical signals to the nucleus can result in changes in gene expression and nucleus morphology. The correlation of nucleus sensing and dysfunction of sarcomeric proteins may assist the understanding of a wide range of functional responses in the progress of cardiomyopathic diseases.
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Affiliation(s)
| | - Maicon Landim-Vieira
- Department of Biomedical Sciences, Florida State University, Tallahassee, FL 32306, USA
| | - Hosna Rastegarpouyani
- Department of Biological Science, Florida State University, Tallahassee, FL 32306, USA
- Institute for Molecular Biophysics, Florida State University, Tallahassee, FL 32306, USA
| | - Prescott Bryant Chase
- Department of Biological Science, Florida State University, Tallahassee, FL 32306, USA
| | - Jerome Irianto
- Department of Biomedical Sciences, Florida State University, Tallahassee, FL 32306, USA
| | - Jose Renato Pinto
- Department of Biomedical Sciences, Florida State University, Tallahassee, FL 32306, USA
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40
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Wallace M, Zahr H, Perati S, Morsink CD, Johnson LE, Gacita AM, Lai S, Wallrath LL, Benjamin IJ, McNally EM, Kirby TJ, Lammerding J. Nuclear damage in LMNA mutant iPSC-derived cardiomyocytes is associated with impaired lamin localization to the nuclear envelope. Mol Biol Cell 2023; 34:mbcE21100527. [PMID: 37585285 PMCID: PMC10846625 DOI: 10.1091/mbc.e21-10-0527] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Revised: 07/31/2023] [Accepted: 08/10/2023] [Indexed: 08/18/2023] Open
Abstract
The LMNA gene encodes the nuclear envelope proteins Lamins A and C, which comprise a major part of the nuclear lamina, provide mechanical support to the nucleus, and participate in diverse intracellular signaling. LMNA mutations give rise to a collection of diseases called laminopathies, including dilated cardiomyopathy (LMNA-DCM) and muscular dystrophies. Although nuclear deformities are a hallmark of LMNA-DCM, the role of nuclear abnormalities in the pathogenesis of LMNA-DCM remains incompletely understood. Using induced pluripotent stem cell-derived cardiomyocytes (iPSC-CMs) from LMNA mutant patients and healthy controls, we show that LMNA mutant iPSC-CM nuclei have altered shape or increased size compared to healthy control iPSC-CM nuclei. The LMNA mutation exhibiting the most severe nuclear deformities, R249Q, additionally caused reduced nuclear stiffness and increased nuclear fragility. Importantly, for all cell lines, the degree of nuclear abnormalities corresponded to the degree of Lamin A/C and Lamin B1 mislocalization from the nuclear envelope. The mislocalization was likely due to altered assembly of Lamin A/C. Collectively, these results point to the importance of correct lamin assembly at the nuclear envelope in providing mechanical stability to the nucleus and suggest that defects in nuclear lamina organization may contribute to the nuclear and cellular dysfunction in LMNA-DCM.
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Affiliation(s)
- Melanie Wallace
- Meinig School of Biomedical Engineering, Cornell University, Ithaca, NY 14853
- Weill Institute for Cell and Molecular Biology, Ithaca, NY 14853
| | - Hind Zahr
- Weill Institute for Cell and Molecular Biology, Ithaca, NY 14853
| | - Shriya Perati
- Weill Institute for Cell and Molecular Biology, Ithaca, NY 14853
| | - Chloé D. Morsink
- Department of Physiology, Amsterdam University Medical Centers, Amsterdam Cardiovascular Sciences, VU Medical Center, 1081 HZ Amsterdam, The Netherlands
| | | | - Anthony M. Gacita
- Center for Genetic Medicine, Feinberg School of Medicine, Northwestern Medicine, Chicago, IL 60611
| | - Shuping Lai
- Cardiovascular Center, Medical College of Wisconsin, Milwaukee, WI 53226
| | - Lori L. Wallrath
- Department of Biochemistry and Molecular Biology, University of Iowa, Iowa City, IA 52242
| | - Ivor J. Benjamin
- Cardiovascular Center, Medical College of Wisconsin, Milwaukee, WI 53226
| | - Elizabeth M. McNally
- Center for Genetic Medicine, Feinberg School of Medicine, Northwestern Medicine, Chicago, IL 60611
| | - Tyler J. Kirby
- Weill Institute for Cell and Molecular Biology, Ithaca, NY 14853
- Department of Physiology, Amsterdam University Medical Centers, Amsterdam Cardiovascular Sciences, VU Medical Center, 1081 HZ Amsterdam, The Netherlands
| | - Jan Lammerding
- Meinig School of Biomedical Engineering, Cornell University, Ithaca, NY 14853
- Weill Institute for Cell and Molecular Biology, Ithaca, NY 14853
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41
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Koushki N, Ghagre A, Srivastava LK, Molter C, Ehrlicher AJ. Nuclear compression regulates YAP spatiotemporal fluctuations in living cells. Proc Natl Acad Sci U S A 2023; 120:e2301285120. [PMID: 37399392 PMCID: PMC10334804 DOI: 10.1073/pnas.2301285120] [Citation(s) in RCA: 14] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Accepted: 06/04/2023] [Indexed: 07/05/2023] Open
Abstract
Yes-associated protein (YAP) is a key mechanotransduction protein in diverse physiological and pathological processes; however, a ubiquitous YAP activity regulatory mechanism in living cells has remained elusive. Here, we show that YAP nuclear translocation is highly dynamic during cell movement and is driven by nuclear compression arising from cell contractile work. We resolve the mechanistic role of cytoskeletal contractility in nuclear compression by manipulation of nuclear mechanics. Disrupting the linker of nucleoskeleton and cytoskeleton complex reduces nuclear compression for a given contractility and correspondingly decreases YAP localization. Conversely, decreasing nuclear stiffness via silencing of lamin A/C increases nuclear compression and YAP nuclear localization. Finally, using osmotic pressure, we demonstrated that nuclear compression even without active myosin or filamentous actin regulates YAP localization. The relationship between nuclear compression and YAP localization captures a universal mechanism for YAP regulation with broad implications in health and biology.
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Affiliation(s)
- Newsha Koushki
- Department of Bioengineering, McGill University, Montreal, QCH3A 0E9, Canada
| | - Ajinkya Ghagre
- Department of Bioengineering, McGill University, Montreal, QCH3A 0E9, Canada
| | | | - Clayton Molter
- Department of Bioengineering, McGill University, Montreal, QCH3A 0E9, Canada
| | - Allen J. Ehrlicher
- Department of Bioengineering, McGill University, Montreal, QCH3A 0E9, Canada
- Department of Anatomy and Cell Biology, McGill University, Montreal, QCH3A 0C7, Canada
- Department of Biomedical Engineering, McGill University, Montreal, QCH3A 2B4, Canada
- Department of Mechanical Engineering, McGill University, Montreal, QCH3A 0C3, Canada
- Centre for Structural Biology, McGill University, Montreal, QCH3G 0B1, Canada
- Rosalind and Morris Goodman Cancer Institute, McGill University, Montreal, QCH3A 1A3, Canada
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42
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Skory RM, Moverley AA, Ardestani G, Alvarez Y, Domingo-Muelas A, Pomp O, Hernandez B, Tetlak P, Bissiere S, Stern CD, Sakkas D, Plachta N. The nuclear lamina couples mechanical forces to cell fate in the preimplantation embryo via actin organization. Nat Commun 2023; 14:3101. [PMID: 37248263 PMCID: PMC10226985 DOI: 10.1038/s41467-023-38770-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2023] [Accepted: 05/15/2023] [Indexed: 05/31/2023] Open
Abstract
During preimplantation development, contractile forces generated at the apical cortex segregate cells into inner and outer positions of the embryo, establishing the inner cell mass (ICM) and trophectoderm. To which extent these forces influence ICM-trophectoderm fate remains unresolved. Here, we found that the nuclear lamina is coupled to the cortex via an F-actin meshwork in mouse and human embryos. Actomyosin contractility increases during development, upregulating Lamin-A levels, but upon internalization cells lose their apical cortex and downregulate Lamin-A. Low Lamin-A shifts the localization of actin nucleators from nucleus to cytoplasm increasing cytoplasmic F-actin abundance. This results in stabilization of Amot, Yap phosphorylation and acquisition of ICM over trophectoderm fate. By contrast, in outer cells, Lamin-A levels increase with contractility. This prevents Yap phosphorylation enabling Cdx2 to specify the trophectoderm. Thus, forces transmitted to the nuclear lamina control actin organization to differentially regulate the factors specifying lineage identity.
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Affiliation(s)
- Robin M Skory
- Department of Cell and Developmental Biology, Institute for Regenerative Medicine Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
- Department of Obstetrics and Gynecology, Division of Reproductive Endocrinology and Infertility, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Adam A Moverley
- Department of Cell and Developmental Biology, Institute for Regenerative Medicine Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
- University College London, WC1E 6BT, London, UK
| | | | - Yanina Alvarez
- Universidad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Ana Domingo-Muelas
- Department of Cell and Developmental Biology, Institute for Regenerative Medicine Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Oz Pomp
- Department of Cell and Developmental Biology, Institute for Regenerative Medicine Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Blake Hernandez
- Department of Cell and Developmental Biology, Institute for Regenerative Medicine Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Piotr Tetlak
- Department of Cell and Developmental Biology, Institute for Regenerative Medicine Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Stephanie Bissiere
- Department of Cell and Developmental Biology, Institute for Regenerative Medicine Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | | | | | - Nicolas Plachta
- Department of Cell and Developmental Biology, Institute for Regenerative Medicine Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA.
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43
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Ouchi M, Kobayashi S, Nishijima Y, Inoue N, Ikota H, Iwase A, Yokoo H, Saio M. Decreased lamin A and B1 expression results in nuclear enlargement in serous ovarian carcinoma, whereas lamin A-expressing tumor cells metastasize to lymph nodes. Pathol Res Pract 2023; 247:154560. [PMID: 37229920 DOI: 10.1016/j.prp.2023.154560] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Accepted: 05/18/2023] [Indexed: 05/27/2023]
Abstract
BACKGROUND Lamins, located beneath the nuclear membrane, are involved in maintaining nuclear stiffness and morphology. The nuclei of tumor cells are enlarged in serous carcinoma, a histologic subtype of ovarian cancer that is notable for its poor prognosis. The present study investigated the association of lamin A, B1, and B2 expression with nuclear morphology and metastatic route in serous ovarian carcinoma. METHODS We performed immunohistochemistry for lamins A, B1, and B2 using specimens of patients who underwent surgery for serous ovarian carcinoma in Gunma University Hospital between 2009 and 2020. Following staining, the specimens were scanned using a whole-slide scanner and processed using computer-assisted image analysis. RESULTS The positivity rates for lamins A and B1 as well as the rank sum of the positivity rates for lamins A, B1, and B2 were negatively correlated with the mean and standard deviation of the nuclear area. Interestingly, the positivity rate for lamin A was significantly higher in metastatic lesions than in primary tumors in cases with lymph node metastasis. DISCUSSION Previous studies indicated that decreased lamin A led to nuclear enlargement and deformation and that lamin B1 was required to maintain the meshworks of lamins A and B2 to maintain nuclear morphology. The present study findings suggest that decreased lamin A and B1 expression might lead to nuclear enlargement and deformation and raise the possibility that tumor cells maintaining or not losing lamin A expression might metastasize to lymph nodes.
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Affiliation(s)
- Miduki Ouchi
- Laboratory of Histopathology and Cytopathology, Department of Laboratory Sciences, Gunma University Graduate School of Health Sciences, Gunma, Japan
| | - Sayaka Kobayashi
- Laboratory of Histopathology and Cytopathology, Department of Laboratory Sciences, Gunma University Graduate School of Health Sciences, Gunma, Japan
| | - Yoshimi Nishijima
- Laboratory of Histopathology and Cytopathology, Department of Laboratory Sciences, Gunma University Graduate School of Health Sciences, Gunma, Japan
| | - Naoki Inoue
- Department of Obstetrics and Gynecology, Gunma University Graduate School of Medicine, Gunma, Japan
| | - Hayato Ikota
- Clinical Department of Pathology, Gunma University Hospital, Gunma, Japan
| | - Akira Iwase
- Department of Obstetrics and Gynecology, Gunma University Graduate School of Medicine, Gunma, Japan
| | - Hideaki Yokoo
- Department of Human Pathology, Gunma University Graduate School of Medicine, Gunma, Japan
| | - Masanao Saio
- Laboratory of Histopathology and Cytopathology, Department of Laboratory Sciences, Gunma University Graduate School of Health Sciences, Gunma, Japan.
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44
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Abstract
Non-muscle myosin 2 (NM2) motors are the major contractile machines in most cell types. Unsurprisingly, these ubiquitously expressed actin-based motors power a plethora of subcellular, cellular and multicellular processes. In this Cell Science at a Glance article and the accompanying poster, we review the biochemical properties and mechanisms of regulation of this myosin. We highlight the central role of NM2 in multiple fundamental cellular processes, which include cell migration, cytokinesis, epithelial barrier function and tissue morphogenesis. In addition, we highlight recent studies using advanced imaging technologies that have revealed aspects of NM2 assembly hitherto inaccessible. This article will hopefully appeal to both cytoskeletal enthusiasts and investigators from outside the cytoskeleton field who have interests in one of the many basic cellular processes requiring actomyosin force production.
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Affiliation(s)
- Melissa A. Quintanilla
- Department of Cell and Molecular Physiology, Stritch School of Medicine, Loyola University Chicago, Maywood, IL 60525, USA
| | - John A. Hammer
- National Heart Lung and Blood Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - Jordan R. Beach
- Department of Cell and Molecular Physiology, Stritch School of Medicine, Loyola University Chicago, Maywood, IL 60525, USA
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45
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Manoj P, Kim JA, Kim S, Li T, Sewani M, Chelu MG, Li N. Sinus node dysfunction: current understanding and future directions. Am J Physiol Heart Circ Physiol 2023; 324:H259-H278. [PMID: 36563014 PMCID: PMC9886352 DOI: 10.1152/ajpheart.00618.2022] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/01/2022] [Revised: 12/20/2022] [Accepted: 12/21/2022] [Indexed: 12/24/2022]
Abstract
The sinoatrial node (SAN) is the primary pacemaker of the heart. Normal SAN function is crucial in maintaining proper cardiac rhythm and contraction. Sinus node dysfunction (SND) is due to abnormalities within the SAN, which can affect the heartbeat frequency, regularity, and the propagation of electrical pulses through the cardiac conduction system. As a result, SND often increases the risk of cardiac arrhythmias. SND is most commonly seen as a disease of the elderly given the role of degenerative fibrosis as well as other age-dependent changes in its pathogenesis. Despite the prevalence of SND, current treatment is limited to pacemaker implantation, which is associated with substantial medical costs and complications. Emerging evidence has identified various genetic abnormalities that can cause SND, shedding light on the molecular underpinnings of SND. Identification of these molecular mechanisms and pathways implicated in the pathogenesis of SND is hoped to identify novel therapeutic targets for the development of more effective therapies for this disease. In this review article, we examine the anatomy of the SAN and the pathophysiology and epidemiology of SND. We then discuss in detail the most common genetic mutations correlated with SND and provide our perspectives on future research and therapeutic opportunities in this field.
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Affiliation(s)
- Pavan Manoj
- School of Public Health, Texas A&M University, College Station, Texas
| | - Jitae A Kim
- Department of Medicine, Baylor College of Medicine, Houston, Texas
| | - Stephanie Kim
- Department of BioSciences, Rice University, Houston, Texas
| | - Tingting Li
- Section of Cardiovascular Research, Department of Medicine, Baylor College of Medicine, Houston, Texas
| | - Maham Sewani
- Department of BioSciences, Rice University, Houston, Texas
| | - Mihail G Chelu
- Division of Cardiology, Department of Medicine, Baylor College of Medicine, Houston, Texas
| | - Na Li
- Section of Cardiovascular Research, Department of Medicine, Baylor College of Medicine, Houston, Texas
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46
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Iijima H, Gilmer G, Wang K, Bean AC, He Y, Lin H, Tang WY, Lamont D, Tai C, Ito A, Jones JJ, Evans C, Ambrosio F. Age-related matrix stiffening epigenetically regulates α-Klotho expression and compromises chondrocyte integrity. Nat Commun 2023; 14:18. [PMID: 36627269 PMCID: PMC9832042 DOI: 10.1038/s41467-022-35359-2] [Citation(s) in RCA: 27] [Impact Index Per Article: 27.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2021] [Accepted: 11/29/2022] [Indexed: 01/12/2023] Open
Abstract
Extracellular matrix stiffening is a quintessential feature of cartilage aging, a leading cause of knee osteoarthritis. Yet, the downstream molecular and cellular consequences of age-related biophysical alterations are poorly understood. Here, we show that epigenetic regulation of α-Klotho represents a novel mechanosensitive mechanism by which the aged extracellular matrix influences chondrocyte physiology. Using mass spectrometry proteomics followed by a series of genetic and pharmacological manipulations, we discovered that increased matrix stiffness drove Klotho promoter methylation, downregulated Klotho gene expression, and accelerated chondrocyte senescence in vitro. In contrast, exposing aged chondrocytes to a soft matrix restored a more youthful phenotype in vitro and enhanced cartilage integrity in vivo. Our findings demonstrate that age-related alterations in extracellular matrix biophysical properties initiate pathogenic mechanotransductive signaling that promotes Klotho promoter methylation and compromises cellular health. These findings are likely to have broad implications even beyond cartilage for the field of aging research.
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Affiliation(s)
- Hirotaka Iijima
- Department of Physical Medicine and Rehabilitation, University of Pittsburgh, Pittsburgh, PA, USA.
- Japan Society for the Promotion of Science, Tokyo, Japan.
- Institute for Advanced Research, Nagoya University, Nagoya, Japan.
| | - Gabrielle Gilmer
- Medical Scientist Training Program, School of Medicine, University of Pittsburgh, Pittsburgh, PA, USA
- Department of Bioengineering, University of Pittsburgh, Pittsburgh, PA, USA
- Cellular and Molecular Pathology Graduate Program, University of Pittsburgh, Pittsburgh, PA, USA
- Discovery Center for Musculoskeletal Recovery, Schoen Adams Research Institute at Spaulding, Boston, MA, USA
- Department of Physical Medicine & Rehabilitation, Harvard Medical School, Boston, MA, USA
| | - Kai Wang
- Department of Physical Medicine and Rehabilitation, University of Pittsburgh, Pittsburgh, PA, USA
- Discovery Center for Musculoskeletal Recovery, Schoen Adams Research Institute at Spaulding, Boston, MA, USA
- Department of Physical Medicine & Rehabilitation, Harvard Medical School, Boston, MA, USA
| | - Allison C Bean
- Department of Physical Medicine and Rehabilitation, University of Pittsburgh, Pittsburgh, PA, USA
- McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, PA, USA
| | - Yuchen He
- Department of Orthopaedic Surgery, University of Pittsburgh, Pittsburgh, PA, USA
| | - Hang Lin
- Department of Bioengineering, University of Pittsburgh, Pittsburgh, PA, USA
- McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, PA, USA
- Department of Orthopaedic Surgery, University of Pittsburgh, Pittsburgh, PA, USA
| | - Wan-Yee Tang
- Department of Environmental and Occupational Health, University of Pittsburgh School of Public Health, Pittsburgh, PA, USA
| | - Daniel Lamont
- Petersen Institute of Nanoscience and Engineering, University of Pittsburgh, Pittsburgh, PA, USA
| | - Chia Tai
- Department of Motor Function Analysis, Human Health Sciences, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Akira Ito
- Department of Motor Function Analysis, Human Health Sciences, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Jeffrey J Jones
- Proteome Exploration Laboratory, Beckman Institute, California Institute of Technology, Pasadena, CA, USA
| | - Christopher Evans
- Department of Physical Medicine & Rehabilitation, Mayo Clinic, Rochester, MN, USA
| | - Fabrisia Ambrosio
- Department of Physical Medicine and Rehabilitation, University of Pittsburgh, Pittsburgh, PA, USA.
- Department of Bioengineering, University of Pittsburgh, Pittsburgh, PA, USA.
- Discovery Center for Musculoskeletal Recovery, Schoen Adams Research Institute at Spaulding, Boston, MA, USA.
- Department of Physical Medicine & Rehabilitation, Harvard Medical School, Boston, MA, USA.
- McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, PA, USA.
- Department of Orthopaedic Surgery, University of Pittsburgh, Pittsburgh, PA, USA.
- Department of Environmental and Occupational Health, University of Pittsburgh School of Public Health, Pittsburgh, PA, USA.
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47
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Xin L, Wen Y, Song J, Chen T, Zhai Q. Bone regeneration strategies based on organelle homeostasis of mesenchymal stem cells. Front Endocrinol (Lausanne) 2023; 14:1151691. [PMID: 37033227 PMCID: PMC10081449 DOI: 10.3389/fendo.2023.1151691] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/26/2023] [Accepted: 03/06/2023] [Indexed: 04/11/2023] Open
Abstract
The organelle modulation has emerged as a crucial contributor to the organismal homeostasis. The mesenchymal stem cells (MSCs), with their putative functions in maintaining the regeneration ability of adult tissues, have been identified as a major driver to underlie skeletal health. Bone is a structural and endocrine organ, in which the organelle regulation on mesenchymal stem cells (MSCs) function has most been discovered recently. Furthermore, potential treatments to control bone regeneration are developing using organelle-targeted techniques based on manipulating MSCs osteogenesis. In this review, we summarize the most current understanding of organelle regulation on MSCs in bone homeostasis, and to outline mechanistic insights as well as organelle-targeted approaches for accelerated bone regeneration.
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Affiliation(s)
- Liangjing Xin
- College of Stomatology, Chongqing Medical University, Chongqing, China
- Chongqing Key Laboratory for Oral Diseases and Biomedical Sciences, Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education, Chongqing, China
| | - Yao Wen
- College of Stomatology, Chongqing Medical University, Chongqing, China
- Chongqing Key Laboratory for Oral Diseases and Biomedical Sciences, Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education, Chongqing, China
| | - Jinlin Song
- College of Stomatology, Chongqing Medical University, Chongqing, China
- Chongqing Key Laboratory for Oral Diseases and Biomedical Sciences, Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education, Chongqing, China
- *Correspondence: Qiming Zhai, ; Tao Chen, ; Jinlin Song,
| | - Tao Chen
- College of Stomatology, Chongqing Medical University, Chongqing, China
- Chongqing Key Laboratory for Oral Diseases and Biomedical Sciences, Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education, Chongqing, China
- *Correspondence: Qiming Zhai, ; Tao Chen, ; Jinlin Song,
| | - Qiming Zhai
- College of Stomatology, Chongqing Medical University, Chongqing, China
- Chongqing Key Laboratory for Oral Diseases and Biomedical Sciences, Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education, Chongqing, China
- *Correspondence: Qiming Zhai, ; Tao Chen, ; Jinlin Song,
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48
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Genotype-Phenotype Correlations in Human Diseases Caused by Mutations of LINC Complex-Associated Genes: A Systematic Review and Meta-Summary. Cells 2022; 11:cells11244065. [PMID: 36552829 PMCID: PMC9777268 DOI: 10.3390/cells11244065] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2022] [Revised: 12/09/2022] [Accepted: 12/13/2022] [Indexed: 12/23/2022] Open
Abstract
Mutations in genes encoding proteins associated with the linker of nucleoskeleton and cytoskeleton (LINC) complex within the nuclear envelope cause different diseases with varying phenotypes including skeletal muscle, cardiac, metabolic, or nervous system pathologies. There is some understanding of the structure of LINC complex-associated proteins and how they interact, but it is unclear how mutations in genes encoding them can cause the same disease, and different diseases with different phenotypes. Here, published mutations in LINC complex-associated proteins were systematically reviewed and analyzed to ascertain whether patterns exist between the genetic sequence variants and clinical phenotypes. This revealed LMNA is the only LINC complex-associated gene in which mutations commonly cause distinct conditions, and there are no clear genotype-phenotype correlations. Clusters of LMNA variants causing striated muscle disease are located in exons 1 and 6, and metabolic disease-associated LMNA variants are frequently found in the tail of lamin A/C. Additionally, exon 6 of the emerin gene, EMD, may be a mutation "hot-spot", and diseases related to SYNE1, encoding nesprin-1, are most often caused by nonsense type mutations. These results provide insight into the diverse roles of LINC-complex proteins in human disease and provide direction for future gene-targeted therapy development.
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Peña B, Gao S, Borin D, Del Favero G, Abdel-Hafiz M, Farahzad N, Lorenzon P, Sinagra G, Taylor MRG, Mestroni L, Sbaizero O. Cellular Biomechanic Impairment in Cardiomyocytes Carrying the Progeria Mutation: An Atomic Force Microscopy Investigation. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:14928-14940. [PMID: 36420863 PMCID: PMC9730902 DOI: 10.1021/acs.langmuir.2c02623] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/23/2022] [Revised: 11/03/2022] [Indexed: 06/16/2023]
Abstract
Given the clinical effect of progeria syndrome, understanding the cell mechanical behavior of this pathology could benefit the patient's treatment. Progeria patients show a point mutation in the lamin A/C gene (LMNA), which could change the cell's biomechanical properties. This paper reports a mechano-dynamic analysis of a progeria mutation (c.1824 C > T, p.Gly608Gly) in neonatal rat ventricular myocytes (NRVMs) using cell indentation by atomic force microscopy to measure alterations in beating force, frequency, and contractile amplitude of selected cells within cell clusters. Furthermore, we examined the beating rate variability using a time-domain method that produces a Poincaré plot because beat-to-beat changes can shed light on the causes of arrhythmias. Our data have been further related to our cell phenotype findings, using immunofluorescence and calcium transient analysis, showing that mutant NRVMs display changes in both beating force and frequency. These changes were associated with a decreased gap junction localization (Connexin 43) in the mutant NRVMs even in the presence of a stable cytoskeletal structure (microtubules and actin filaments) when compared with controls (wild type and non-treated cells). These data emphasize the kindred between nucleoskeleton (LMNA), cytoskeleton, and the sarcolemmal structures in NRVM with the progeria Gly608Gly mutation, prompting future mechanistic and therapeutic investigations.
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Affiliation(s)
- Brisa Peña
- Cardiovascular
Institute & Adult Medical Genetics, University of Colorado Denver Anschutz Medical Campus, Aurora, Colorado80045, United States
- Bioengineering
Department, University of Colorado Denver
Anschutz Medical Campus, 12705 E. Montview Avenue, Suite 100, Aurora, Colorado80045, United States
| | - Shanshan Gao
- Cardiovascular
Institute & Adult Medical Genetics, University of Colorado Denver Anschutz Medical Campus, Aurora, Colorado80045, United States
| | - Daniele Borin
- Department
of Engineering and Architecture, University
of Trieste, Trieste34127, Italy
| | - Giorgia Del Favero
- Department
of Food Chemistry and Toxicology, Faculty of Chemistry, University of Vienna, Währinger Straße 38-42, 1090Vienna, Austria
- Core
Facility Multimodal Imaging, Faculty of Chemistry, University of Vienna, Wien, Währinger Straße 38-42, 1090Vienna, Austria
| | - Mostafa Abdel-Hafiz
- Bioengineering
Department, University of Colorado Denver
Anschutz Medical Campus, 12705 E. Montview Avenue, Suite 100, Aurora, Colorado80045, United States
| | - Nasim Farahzad
- Bioengineering
Department, University of Colorado Denver
Anschutz Medical Campus, 12705 E. Montview Avenue, Suite 100, Aurora, Colorado80045, United States
| | - Paola Lorenzon
- Department
F of Life Sciences, University of Trieste, Trieste34127, Italy
| | - Gianfranco Sinagra
- Polo
Cardiologico, Azienda Sanitaria Universitaria
Integrata di Trieste, Strada di Fiume 447, Trieste34127, Italy
| | - Matthew R. G. Taylor
- Cardiovascular
Institute & Adult Medical Genetics, University of Colorado Denver Anschutz Medical Campus, Aurora, Colorado80045, United States
| | - Luisa Mestroni
- Cardiovascular
Institute & Adult Medical Genetics, University of Colorado Denver Anschutz Medical Campus, Aurora, Colorado80045, United States
| | - Orfeo Sbaizero
- Cardiovascular
Institute & Adult Medical Genetics, University of Colorado Denver Anschutz Medical Campus, Aurora, Colorado80045, United States
- Department
of Engineering and Architecture, University
of Trieste, Trieste34127, Italy
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50
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Santini GT, Shah PP, Karnay A, Jain R. Aberrant chromatin organization at the nexus of laminopathy disease pathways. Nucleus 2022; 13:300-312. [PMID: 36503349 PMCID: PMC9746625 DOI: 10.1080/19491034.2022.2153564] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2022] [Revised: 11/02/2022] [Accepted: 11/11/2022] [Indexed: 12/14/2022] Open
Affiliation(s)
- Garrett T. Santini
- Departments of Medicine and Cell and Developmental Biology, Penn Cardiovascular Institute, Penn Epigenetics Institute, Perelman School of Medicine, University of Pennsylvania, Philadelphia, USA
| | - Parisha P. Shah
- Departments of Medicine and Cell and Developmental Biology, Penn Cardiovascular Institute, Penn Epigenetics Institute, Perelman School of Medicine, University of Pennsylvania, Philadelphia, USA
| | - Ashley Karnay
- Departments of Medicine and Cell and Developmental Biology, Penn Cardiovascular Institute, Penn Epigenetics Institute, Perelman School of Medicine, University of Pennsylvania, Philadelphia, USA
| | - Rajan Jain
- Departments of Medicine and Cell and Developmental Biology, Penn Cardiovascular Institute, Penn Epigenetics Institute, Perelman School of Medicine, University of Pennsylvania, Philadelphia, USA
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