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Yang X, Wu J, Cai T, Shan J, Cui Y. Kindlin-2 mediates Peyronie's disease through activation of TGF-β/Smad signaling pathway under the presence of TGF-β1. Cell Signal 2024:111286. [PMID: 38977232 DOI: 10.1016/j.cellsig.2024.111286] [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: 06/14/2024] [Revised: 06/28/2024] [Accepted: 07/02/2024] [Indexed: 07/10/2024]
Abstract
BACKGROUND Peyronie's disease (PD) causes benign plaques or induration on the lateral cirrus. Kindlin-2 regulates the TGF-β1/Smad3 pathway, which accelerates kidney fibrosis. The study is aimed mainly to investigate the impact of Kindlin-2 on PD formation and its signaling pathways, notably the TGF-β/Smad pathway in the presence of TGF-β1. METHODS In this mouse investigation, adenovirus TGF-β1 was injected into TA to produce PD. The model was successfully induced 45 days later. WB and IHC were utilized to measure Kindlin-2 in PD model tissue. Western blot and immunofluorescence assays were utilized to confirm the impact of TGF-β1 on Kindlin-2 levels in vitro. The Kindlin-2, TβRI, and Smad3 connection was detected using immunoprecipitation (IP) experiments. We examined how TGF-β1 affects the Smad3 phosphorylation and downstream gene activation process. Finally, Kindlin-2 and PD were examined in PD model. RESULTS Kindlin-2 levels were elevated in the TGF-β1-induced PD model, confirming that TGF-β1 can increase Kindlin-2 levels in primary PD cells. Moreover, Kindlin-2 mediates Smad3-TβRI interaction, activates p-Smad3, and enhances TGF-β1 target gene expression. In vivo investigations reveal Kindlin-2 promotes PD and tissue fibrosis. The regulatory effects of Kindlin-2 need the presence of TGF-β1. Tissue fibrosis can be reduced by downregulating Kindlin-2. CONCLUSION Kindlin-2 does not directly activate Smad3 to induce tissue fibrosis. Instead, it exerts its effect through the combined influence of TGF-β1. Inhibiting Kindlin-2 could potentially be a treatment for Parkinson's disease (PD).
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Affiliation(s)
- Xiaobo Yang
- Department of Urology, General Hospital of Ningxia Medical University, Yinchuan 750000, China
| | - Jitao Wu
- Department of Urology, Yantai Yuhuangding Hospital, No. 20 East Yuhuangding Road, Yantai, Shandong 264000, China
| | - Tong Cai
- Department of Urology, Yantai Yuhuangding Hospital, No. 20 East Yuhuangding Road, Yantai, Shandong 264000, China
| | - Jiahao Shan
- Department of Urology, General Hospital of Ningxia Medical University, Yinchuan 750000, China
| | - Yuanshan Cui
- Department of Urology, Yantai Yuhuangding Hospital, No. 20 East Yuhuangding Road, Yantai, Shandong 264000, China.
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2
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Xu Z, Zhou Y, Yu H, Chen X, Ma YQ. Myosin light chain 6 (Myl6) interacts with kindlin-3 and is required to support integrin α IIbβ 3 activation in platelets in mice. J Thromb Haemost 2024; 22:2009-2017. [PMID: 38266679 PMCID: PMC11214885 DOI: 10.1016/j.jtha.2024.01.007] [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: 08/07/2023] [Revised: 01/03/2024] [Accepted: 01/08/2024] [Indexed: 01/26/2024]
Abstract
BACKGROUND Kindlin-3 in platelets plays an essential role in supporting integrin αIIbβ3 activation, platelet spreading, aggregation, and clot retraction by binding to the integrin β3 cytoplasmic tail. However, the mechanism by which kindlin-3 mediates the crosstalk between integrin αIIbβ3 and myosin in platelets remains unknown. OBJECTIVES To examine the role of myosin light chain 6 (Myl6) in supporting integrin αIIbβ3 activation in platelets. METHODS Myl6fl/flPF4-Cre mice with a deficiency of Myl6 in the megakaryocyte lineage were generated, and integrin αIIbβ3 activation in Myl6-deficient platelets was analyzed. RESULTS We identified a novel kindlin-3 binding protein, Myl6, an essential light chain of myosin in platelets. Myl6fl/flPF4-Cre mice exhibited significant macrothrombocytopenia resulting from defective proplatelet formation. In the absence of Myl6, integrin αIIbβ3 activation in platelets was significantly suppressed, and platelet aggregation was substantially impaired. Interestingly, the deficiency of Myl6 in platelets preferentially affected the binding of a multivalent ligand compared to a monovalent ligand to integrin αIIbβ3 upon activation, indicating that Myl6 may contribute to the avidity modulation of integrin αIIbβ3 by binding to kindlin-3. Furthermore, blood coagulation ability was impaired in Myl6fl/flPF4-Cre mice, and consistently, these mice exhibited defects in both hemostatic and thrombotic functions. CONCLUSION In summary, these results suggest that Myl6, as a novel kindlin-3 binding partner, is required to support integrin αIIbβ3 activation in platelets, which plays an important role in both hemostasis and thrombosis.
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Affiliation(s)
- Zhen Xu
- Thrombosis and Hemostasis Program, Versiti Blood Research Institute, Milwaukee, Wisconsin, USA
| | - Ying Zhou
- Thrombosis and Hemostasis Program, Versiti Blood Research Institute, Milwaukee, Wisconsin, USA
| | - Hongyin Yu
- Thrombosis and Hemostasis Program, Versiti Blood Research Institute, Milwaukee, Wisconsin, USA
| | - Xue Chen
- Shanghai General Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Yan-Qing Ma
- Thrombosis and Hemostasis Program, Versiti Blood Research Institute, Milwaukee, Wisconsin, USA; Department of Biochemistry, Medical College of Milwaukee, Milwaukee, Wisconsin, USA.
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Sidibé A, Mykuliak VV, Zhang P, Hytönen VP, Wu J, Wehrle-Haller B. Acetyl-NPKY of integrin-β1 binds KINDLIN2 to control endothelial cell proliferation and junctional integrity. iScience 2024; 27:110129. [PMID: 38904068 PMCID: PMC11187247 DOI: 10.1016/j.isci.2024.110129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2023] [Revised: 02/09/2024] [Accepted: 05/24/2024] [Indexed: 06/22/2024] Open
Abstract
Integrin-dependent crosstalk between cell-matrix adhesions and cell-cell junctions is critical for controlling endothelial permeability and proliferation in cancer and inflammatory diseases but remains poorly understood. Here, we investigated how acetylation of the distal NPKY-motif of Integrin-β1 influences endothelial cell physiology and barrier function. Expression of an acetylation-mimetic β1-K794Q-GFP mutant led to the accumulation of immature cell-matrix adhesions accompanied by a transcriptomic reprograming of endothelial cells, involving genes associated with cell adhesion, proliferation, polarity, and barrier function. β1-K794Q-GFP induced constitutive MAPK signaling, junctional impairment, proliferation, and reduced contact inhibition at confluence. Structural analysis of Integrin-β1 interaction with KINDLIN2, biochemical pulldown assay, and binding energy determination by using molecular dynamics simulation showed that acetylation of K794 and the K794Q-mutant increased KINDLIN2 binding affinity to the Integrin-β1. Thus, enhanced recruitment of KINDLIN2 to Lysine-acetylated Integrin-β1 and resulting modulation of barrier function, offers new therapeutic possibilities for controlling vascular permeability and disease conditions.
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Affiliation(s)
- Adama Sidibé
- Department of Cell Physiology and Metabolism, University of Geneva, Centre Médical Universitaire, Rue Michel-Servet 1, CH-1211 Geneva, Switzerland
| | - Vasyl V. Mykuliak
- Faculty of Medicine and Health Technology, Tampere University, Arvo Ylpön katu 34, FI-33520 Tampere, Finland
| | - Pingfeng Zhang
- Faculty of Medicine and Health Technology, Tampere University, Arvo Ylpön katu 34, FI-33520 Tampere, Finland
| | - Vesa P. Hytönen
- Faculty of Medicine and Health Technology, Tampere University, Arvo Ylpön katu 34, FI-33520 Tampere, Finland
- Fimlab Laboratories, Biokatu 4, FI-33520 Tampere, Finland
| | - Jinhua Wu
- Cancer Signaling and Microenvironment Program, Fox Chase Cancer Center, 333 Cottman Avenue, Philadelphia, PA 19111, USA
| | - Bernhard Wehrle-Haller
- Department of Cell Physiology and Metabolism, University of Geneva, Centre Médical Universitaire, Rue Michel-Servet 1, CH-1211 Geneva, Switzerland
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4
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Yousafzai NA, El Khalki L, Wang W, Szpendyk J, Sossey-Alaoui K. Kindlin-2 Regulates the Oncogenic Activities of Integrins and TGF-β In Triple Negative Breast Cancer Progression and Metastasis. RESEARCH SQUARE 2024:rs.3.rs-3914650. [PMID: 38405979 PMCID: PMC10889066 DOI: 10.21203/rs.3.rs-3914650/v1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/27/2024]
Abstract
Background Kindlin-2, an adaptor protein, is dysregulated in various human cancers, including triple negative breast cancer (TNBC), where it drives tumor progression and metastasis by influencing several cancer hallmarks. One well-established role of Kindlin-2 involves the regulation of integrin signaling, achieved by directly binding to the cytoplasmic tail of the integrin β subunit. In this study, we present novel insights into Kindlin-2's involvement in stabilizing the β1-Integrin:TGF-β type 1 receptor (TβRI) complexes, acting as a physical bridge that links β1-Integrin to TβRI. The loss of Kindlin-2 results in the degradation of this protein complex, leading to the inhibition of downstream oncogenic pathways. Methods Our methodology encompassed a diverse range of in vitro assays, including CRISPR/Cas9 gene editing, cell migration, 3D tumorsphere formation and invasion, solid binding, co-immunoprecipitation, cell adhesion and spreading assays, as well as western blot and flow cytometry analyses, utilizing MDA-MB-231 and 4T1 TNBC cell lines. Additionally, preclinical in vivo mouse models of TNBC tumor progression and metastasis were employed to substantiate our findings. Results The investigation revealed that the direct interaction between Kindlin-2 and β1-Integrin is mediated through the C-terminal F3 domain of Kindlin-2, while the interaction between Kindlin-2 and TβRI is facilitated through the F2 domain of Kindlin-2. Disruption of this bridge, achieved via CRISPR/Cas9-mediated knockout of Kindlin-2, led to the degradation of β1-Integrin and TβRI, resulting in the inhibition of oncogenic pathways downstream of both proteins, subsequently hindering tumor growth and metastasis. Treatment of Kindlin-2-deficient cells with the proteasome inhibitor MG-132 restored the expression of both β1-Integrin and TβRI. Furthermore, the rescue of Kindlin-2 expression reinstated their oncogenic activities both in vitro and in vivo. Conclusions This study identifies a novel function of Kindlin-2 in stabilizing the β1-Integrin:TβR1 complexes and regulating their downstream oncogenic signaling. The translational implications of these findings are substantial, potentially unveiling new therapeutically targeted pathways crucial for the treatment of TNBC tumors.
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Sarkar A, Niraula G, LeVine D, Zhao Y, Tu Y, Mollaeian K, Ren J, Que L, Wang X. Development of a Ratiometric Tension Sensor Exclusively Responding to Integrin Tension Magnitude in Live Cells. ACS Sens 2023; 8:3701-3712. [PMID: 37738233 PMCID: PMC10788086 DOI: 10.1021/acssensors.3c00606] [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: 09/24/2023]
Abstract
Integrin tensions are critical for cell mechanotransduction. By converting force to fluorescence, molecular tension sensors image integrin tensions in live cells with a high resolution. However, the fluorescence signal intensity results collectively from integrin tension magnitude, tension dwell time, integrin density, sensor accessibility, and so forth, making it highly challenging to specifically monitor the molecular force level of integrin tensions. Here, a ratiometric tension sensor (RTS) was developed to exclusively monitor the integrin tension magnitude. The RTS consists of two tension-sensing units that are coupled in series and always subject to the same integrin tension. These two units are activated by tension to fluoresce in separate spectra and with different activation rates. The ratio of their activation probabilities, reported by fluorescence ratiometric measurement, is solely determined by the local integrin tension magnitude. RTS responded sensitively to the variation of integrin tension magnitude in platelets and focal adhesions due to different cell plating times, actomyosin inhibition, or vinculin knockout. At last, RTS confirmed that integrin tension magnitude in platelets and focal adhesions decreases monotonically with the substrate rigidity, verifying the rigidity dependence of integrin tensions in live cells and suggesting that integrin tension magnitude could be a key biomechanical factor in cell rigidity sensing.
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Affiliation(s)
- Anwesha Sarkar
- Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, United States
| | - Gopal Niraula
- Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, United States
| | - Dana LeVine
- Department of Veterinary Clinical Sciences, Iowa State University, Ames, Iowa 50011, United States
| | - Yuanchang Zhao
- Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, United States
| | - Ying Tu
- Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, United States
| | - Keyvan Mollaeian
- Department of Mechanical Engineering, Iowa State University, Ames, Iowa 50011, United States
| | - Juan Ren
- Department of Mechanical Engineering, Iowa State University, Ames, Iowa 50011, United States
| | - Long Que
- Department of Electrical and Computer Engineering, Iowa State University, Ames, Iowa 50011, United States
| | - Xuefeng Wang
- Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, United States
- Hoxworth Blood Center, College of Medicine, The University of Cincinnati, Cincinnati, Ohio 45219, United States
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Huang D, Chen S, Xiong D, Wang H, Zhu L, Wei Y, Li Y, Zou S. Mitochondrial Dynamics: Working with the Cytoskeleton and Intracellular Organelles to Mediate Mechanotransduction. Aging Dis 2023; 14:1511-1532. [PMID: 37196113 PMCID: PMC10529762 DOI: 10.14336/ad.2023.0201] [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: 10/21/2022] [Accepted: 02/01/2023] [Indexed: 05/19/2023] Open
Abstract
Cells are constantly exposed to various mechanical environments; therefore, it is important that they are able to sense and adapt to changes. It is known that the cytoskeleton plays a critical role in mediating and generating extra- and intracellular forces and that mitochondrial dynamics are crucial for maintaining energy homeostasis. Nevertheless, the mechanisms by which cells integrate mechanosensing, mechanotransduction, and metabolic reprogramming remain poorly understood. In this review, we first discuss the interaction between mitochondrial dynamics and cytoskeletal components, followed by the annotation of membranous organelles intimately related to mitochondrial dynamic events. Finally, we discuss the evidence supporting the participation of mitochondria in mechanotransduction and corresponding alterations in cellular energy conditions. Notable advances in bioenergetics and biomechanics suggest that the mechanotransduction system composed of mitochondria, the cytoskeletal system, and membranous organelles is regulated through mitochondrial dynamics, which may be a promising target for further investigation and precision therapies.
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Affiliation(s)
| | | | | | | | | | | | - Yuyu Li
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Shujuan Zou
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
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Angelini A, Trial J, Saltzman AB, Malovannaya A, Cieslik KA. A defective mechanosensing pathway affects fibroblast-to-myofibroblast transition in the old male mouse heart. iScience 2023; 26:107283. [PMID: 37520701 PMCID: PMC10372839 DOI: 10.1016/j.isci.2023.107283] [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: 01/31/2023] [Revised: 05/12/2023] [Accepted: 06/30/2023] [Indexed: 08/01/2023] Open
Abstract
The cardiac fibroblast interacts with an extracellular matrix (ECM), enabling myofibroblast maturation via a process called mechanosensing. Although in the aging male heart, ECM is stiffer than in the young mouse, myofibroblast development is impaired, as demonstrated in 2-D and 3-D experiments. In old male cardiac fibroblasts, we found a decrease in actin polymerization, α-smooth muscle actin (α-SMA), and Kindlin-2 expressions, the latter an effector of the mechanosensing. When Kindlin-2 levels were manipulated via siRNA interference, young fibroblasts developed an old-like fibroblast phenotype, whereas Kindlin-2 overexpression in old fibroblasts reversed the defective phenotype. Finally, inhibition of overactivated extracellular regulated kinases 1 and 2 (ERK1/2) in the old male fibroblasts rescued actin polymerization and α-SMA expression. Pathological ERK1/2 overactivation was also attenuated by Kindlin-2 overexpression. In contrast, old female cardiac fibroblasts retained an operant mechanosensing pathway. In conclusion, we identified defective components of the Kindlin/ERK/actin/α-SMA mechanosensing axis in aged male fibroblasts.
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Affiliation(s)
- Aude Angelini
- Section of Cardiovascular Research, Department of Medicine, Baylor College of Medicine, Houston, TX, USA
| | - JoAnn Trial
- Section of Cardiovascular Research, Department of Medicine, Baylor College of Medicine, Houston, TX, USA
| | - Alexander B. Saltzman
- Verna and Marrs McLean Department of Biochemistry and Molecular Biology, Baylor College of Medicine, Houston, TX, USA
- Mass Spectrometry Proteomics Core, Baylor College of Medicine, Houston, TX, USA
| | - Anna Malovannaya
- Verna and Marrs McLean Department of Biochemistry and Molecular Biology, Baylor College of Medicine, Houston, TX, USA
- Mass Spectrometry Proteomics Core, Baylor College of Medicine, Houston, TX, USA
| | - Katarzyna A. Cieslik
- Section of Cardiovascular Research, Department of Medicine, Baylor College of Medicine, Houston, TX, USA
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8
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Liu C, Jiang K, Ding Y, Yang A, Cai R, Bai P, Xiong M, Fu C, Quan M, Xiong Z, Deng Y, Tian R, Wu C, Sun Y. Kindlin-2 enhances c-Myc translation through association with DDX3X to promote pancreatic ductal adenocarcinoma progression. Theranostics 2023; 13:4333-4355. [PMID: 37649609 PMCID: PMC10465218 DOI: 10.7150/thno.85421] [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: 04/19/2023] [Accepted: 07/27/2023] [Indexed: 09/01/2023] Open
Abstract
Rationale: Pancreatic ductal adenocarcinoma (PDAC) is an aggressive solid tumor, with extremely low survival rates. Identifying key signaling pathways driving PDAC progression is crucial for the development of therapies to improve patient response rates. Kindlin-2, a multi-functional protein, is involved in numerous biological processes including cell proliferation, apoptosis and migration. However, little is known about the functions of Kindlin-2 in pancreatic cancer progression in vivo. Methods: In this study, we employ an in vivo PDAC mouse model to directly investigate the role of Kindlin-2 in PDAC progression. Then, we utilized RNA-sequencing, the molecular and cellular assays to determine the molecular mechanisms by which Kindlin-2 promotes PDAC progression. Results: We show that loss of Kindlin-2 markedly inhibits KrasG12D-driven pancreatic cancer progression in vivo as well as in vitro. Furthermore, we provide new mechanistic insight into how Kindlin-2 functions in this process, A fraction of Kindlin-2 was localized to the endoplasmic reticulum and associated with the RNA helicase DDX3X, a key regulator of mRNA translation. Loss of Kindlin-2 blocked DDX3X from binding to the 5'-untranslated region of c-Myc and inhibited DDX3X-mediated c-Myc translation, leading to reduced c-Myc-mediated glucose metabolism and tumor growth. Importantly, restoration of the expression of either the full-length Kindlin-2 or c-Myc, but not that of a DDX3X-binding-defective mutant of Kindlin-2, in Kindlin-2 deficient PDAC cells, reversed the inhibition of glycolysis and pancreatic cancer progression induced by the loss of Kindlin-2. Conclusion: Our studies reveal a novel Kindlin-2-DDX3X-c-Myc signaling axis in PDAC progression and suggest that inhibition of this signaling axis may provide a promising therapeutic approach to alleviate PDAC progression.
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Affiliation(s)
- Chengmin Liu
- Department of System Biology, School of Life Sciences, Guangdong Provincial Key Laboratory of Cell Microenvironment and Disease Research, Shenzhen Key Laboratory of Cell Microenvironment, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Ke Jiang
- Department of System Biology, School of Life Sciences, Guangdong Provincial Key Laboratory of Cell Microenvironment and Disease Research, Shenzhen Key Laboratory of Cell Microenvironment, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Yanyan Ding
- Department of System Biology, School of Life Sciences, Guangdong Provincial Key Laboratory of Cell Microenvironment and Disease Research, Shenzhen Key Laboratory of Cell Microenvironment, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Aihua Yang
- Department of System Biology, School of Life Sciences, Guangdong Provincial Key Laboratory of Cell Microenvironment and Disease Research, Shenzhen Key Laboratory of Cell Microenvironment, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Renwei Cai
- Department of System Biology, School of Life Sciences, Guangdong Provincial Key Laboratory of Cell Microenvironment and Disease Research, Shenzhen Key Laboratory of Cell Microenvironment, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Panzhu Bai
- Department of System Biology, School of Life Sciences, Guangdong Provincial Key Laboratory of Cell Microenvironment and Disease Research, Shenzhen Key Laboratory of Cell Microenvironment, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Minggang Xiong
- Department of Human Cell Biology and Genetics, School of Medicine, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Changying Fu
- Department of Chemistry, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Meiling Quan
- Department of System Biology, School of Life Sciences, Guangdong Provincial Key Laboratory of Cell Microenvironment and Disease Research, Shenzhen Key Laboratory of Cell Microenvironment, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Zailin Xiong
- Department of System Biology, School of Life Sciences, Guangdong Provincial Key Laboratory of Cell Microenvironment and Disease Research, Shenzhen Key Laboratory of Cell Microenvironment, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Yi Deng
- Department of System Biology, School of Life Sciences, Guangdong Provincial Key Laboratory of Cell Microenvironment and Disease Research, Shenzhen Key Laboratory of Cell Microenvironment, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Ruijun Tian
- Department of Chemistry, Southern University of Science and Technology, Shenzhen, 518055, China
- Research Center for Chemical Biology and Omics Analysis, College of Science, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Chuanyue Wu
- Department of Pathology, School of Medicine and University of Pittsburgh Cancer Institute, University of Pittsburgh, Pittsburgh, PA 15260, USA
| | - Ying Sun
- Department of System Biology, School of Life Sciences, Guangdong Provincial Key Laboratory of Cell Microenvironment and Disease Research, Shenzhen Key Laboratory of Cell Microenvironment, Southern University of Science and Technology, Shenzhen, 518055, China
- Research Center for Chemical Biology and Omics Analysis, College of Science, Southern University of Science and Technology, Shenzhen, 518055, China
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Sadhanasatish T, Augustin K, Windgasse L, Chrostek-Grashoff A, Rief M, Grashoff C. A molecular optomechanics approach reveals functional relevance of force transduction across talin and desmoplakin. SCIENCE ADVANCES 2023; 9:eadg3347. [PMID: 37343090 DOI: 10.1126/sciadv.adg3347] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2022] [Accepted: 05/17/2023] [Indexed: 06/23/2023]
Abstract
Many mechanobiological processes that govern development and tissue homeostasis are regulated on the level of individual molecular linkages, and a number of proteins experiencing piconewton-scale forces in cells have been identified. However, under which conditions these force-bearing linkages become critical for a given mechanobiological process is often still unclear. Here, we established an approach to revealing the mechanical function of intracellular molecules using molecular optomechanics. When applied to the integrin activator talin, the technique provides direct evidence that its role as a mechanical linker is indispensable for the maintenance of cell-matrix adhesions and overall cell integrity. Applying the technique to desmoplakin shows that mechanical engagement of desmosomes to intermediate filaments is expendable under homeostatic conditions yet strictly required for preserving cell-cell adhesion under stress. These results reveal a central role of talin and desmoplakin as mechanical linkers in cell adhesion structures and demonstrate that molecular optomechanics is a powerful tool to investigate the molecular details of mechanobiological processes.
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Affiliation(s)
- Tanmay Sadhanasatish
- University of Münster, Institute of Integrative Cell Biology and Physiology, Münster D-48149, Germany
| | - Katharina Augustin
- Center for Protein Assemblies and Department of Bioscience, School of Natural Sciences, Technical University of Munich, 85748 Garching, Germany
| | - Lukas Windgasse
- University of Münster, Institute of Integrative Cell Biology and Physiology, Münster D-48149, Germany
| | - Anna Chrostek-Grashoff
- University of Münster, Institute of Integrative Cell Biology and Physiology, Münster D-48149, Germany
| | - Matthias Rief
- Center for Protein Assemblies and Department of Bioscience, School of Natural Sciences, Technical University of Munich, 85748 Garching, Germany
| | - Carsten Grashoff
- University of Münster, Institute of Integrative Cell Biology and Physiology, Münster D-48149, Germany
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Pernier J, Santos MCD, Souissi M, Joly A, Narassimprakash H, Rossier O, Giannone G, Helfer E, Sengupta K, Clainche CL. Talin and kindlin cooperate to control the density of integrin clusters. J Cell Sci 2023; 136:307144. [PMID: 37083041 DOI: 10.1242/jcs.260746] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2022] [Accepted: 03/03/2023] [Indexed: 04/22/2023] Open
Abstract
Focal adhesions are composed of transmembrane integrins, linking the extracellular matrix to the actomyosin cytoskeleton, via cytoplasmic proteins. Adhesion depends on the activation of integrins. Talin and kindlin proteins are intracellular activators of integrins that bind to β-integrin cytoplasmic tails. Integrin activation and clustering through extracellular ligands guide the organization of adhesion complexes. However, the roles of talin and kindlin in this process are poorly understood. To determine the contribution of talin, kindlin, lipids and actomyosin in integrin clustering, we used a biomimetic in vitro system, made of giant unilamellar vesicles, containing transmembrane integrins (herein αIIbβ3), with purified talin (talin-1), kindlin (kindlin-2, also known as FERMT2) and actomyosin. Here, we show that talin and kindlin individually have the ability to cluster integrins. Talin and kindlin synergize to induce the formation of larger integrin clusters containing the three proteins. Comparison of protein density reveals that kindlin increases talin and integrin density, whereas talin does not affect kindlin and integrin density. Finally, kindlin increases integrin-talin-actomyosin coupling. Our study unambiguously demonstrates how kindlin and talin cooperate to induce integrin clustering, which is a major parameter for cell adhesion.
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Affiliation(s)
- Julien Pernier
- Université Paris-Saclay, CEA, CNRS, Institute for Integrative Biology of the Cell (I2BC), 91198, Gif-sur-Yvette, France
| | - Marcelina Cardoso Dos Santos
- Université Paris-Saclay, CEA, CNRS, Institute for Integrative Biology of the Cell (I2BC), 91198, Gif-sur-Yvette, France
| | - Mariem Souissi
- Aix Marseille Univ, CNRS, CINAM, Turing Centre for Living Systems, Marseille, France
| | - Adrien Joly
- Université de Bordeaux, CNRS, Interdisciplinary Institute for Neuroscience, IINS, UMR 5297, F-33000 Bordeaux, France
| | - Hemalatha Narassimprakash
- Université Paris-Saclay, CEA, CNRS, Institute for Integrative Biology of the Cell (I2BC), 91198, Gif-sur-Yvette, France
| | - Olivier Rossier
- Université de Bordeaux, CNRS, Interdisciplinary Institute for Neuroscience, IINS, UMR 5297, F-33000 Bordeaux, France
| | - Grégory Giannone
- Université de Bordeaux, CNRS, Interdisciplinary Institute for Neuroscience, IINS, UMR 5297, F-33000 Bordeaux, France
| | - Emmanuèle Helfer
- Aix Marseille Univ, CNRS, CINAM, Turing Centre for Living Systems, Marseille, France
| | - Kheya Sengupta
- Aix Marseille Univ, CNRS, CINAM, Turing Centre for Living Systems, Marseille, France
| | - Christophe Le Clainche
- Université Paris-Saclay, CEA, CNRS, Institute for Integrative Biology of the Cell (I2BC), 91198, Gif-sur-Yvette, France
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11
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Ji Y, Fang Y, Wu J. Tension Enhances the Binding Affinity of β1 Integrin by Clamping Talin Tightly: An Insight from Steered Molecular Dynamics Simulations. J Chem Inf Model 2022; 62:5688-5698. [PMID: 36269690 DOI: 10.1021/acs.jcim.2c00963] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Integrin activation is a predominant step for cell-cell and cell-ECM interactions. Talin and Kindlin are mechanosensitive adaptor proteins that bind to the integrin cytoplasmic tail and mediate integrin activation, cytoskeleton rearrangement, and focal adhesion assembly. However, knowledge about how Talin and Kindlin synergistically assist integrin activation remains unclear. Here, we performed so-called "ramp-clamp" SMD simulations, which modeled the mechanosignaling from Kindlin, to investigate the effect of tension on the interaction of the β1 integrin cytoplasmic tail with the Talin-F3 domain. The present results showed that mild but not excessive stretching enhanced the binding of integrin with Talin. This mechanical regulation on integrin affinity to Talin referred to an event cascade, in which under stretching, the integrin cytoplasmic tail adopted allostery in response to the mechanical stimulus, remodeling of integrin in favor of Talin-association ensued, and finally, a stable, close-knit complex was formed. In the cascade, the torsion angle transition of integrin was the cue for the stable interaction of the complex under tensile force. The present work suggested a model for Talin and Kindlin to synergistically activate integrin. It should help understand integrin activation and its mechanochemical regulation mechanism, integrin-related innate cellular immune responses, cell adhesion, cell-cell interaction, and integrin-related drug development.
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Affiliation(s)
- Yanru Ji
- Institute of Biomechanics/School of Bioscience and Bioengineering, South China University of Technology, Guangzhou 510006, China
| | - Ying Fang
- Institute of Biomechanics/School of Bioscience and Bioengineering, South China University of Technology, Guangzhou 510006, China
| | - Jianhua Wu
- Institute of Biomechanics/School of Bioscience and Bioengineering, South China University of Technology, Guangzhou 510006, China
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12
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Quaglia F, Krishn SR, Sossey-Alaoui K, Rana PS, Pluskota E, Park PH, Shields CD, Lin S, McCue P, Kossenkov AV, Wang Y, Goodrich DW, Ku SY, Beltran H, Kelly WK, Corey E, Klose M, Bandtlow C, Liu Q, Altieri DC, Plow EF, Languino LR. The NOGO receptor NgR2, a novel αVβ3 integrin effector, induces neuroendocrine differentiation in prostate cancer. Sci Rep 2022; 12:18879. [PMID: 36344556 PMCID: PMC9640716 DOI: 10.1038/s41598-022-21711-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2021] [Accepted: 09/30/2022] [Indexed: 11/09/2022] Open
Abstract
Androgen deprivation therapies aimed to target prostate cancer (PrCa) are only partially successful given the occurrence of neuroendocrine PrCa (NEPrCa), a highly aggressive and highly metastatic form of PrCa, for which there is no effective therapeutic approach. Our group has demonstrated that while absent in prostate adenocarcinoma, the αVβ3 integrin expression is increased during PrCa progression toward NEPrCa. Here, we show a novel pathway activated by αVβ3 that promotes NE differentiation (NED). This novel pathway requires the expression of a GPI-linked surface molecule, NgR2, also known as Nogo-66 receptor homolog 1. We show here that NgR2 is upregulated by αVβ3, to which it associates; we also show that it promotes NED and anchorage-independent growth, as well as a motile phenotype of PrCa cells. Given our observations that high levels of αVβ3 and, as shown here, of NgR2 are detected in human and mouse NEPrCa, our findings appear to be highly relevant to this aggressive and metastatic subtype of PrCa. This study is novel because NgR2 role has only minimally been investigated in cancer and has instead predominantly been analyzed in neurons. These data thus pave new avenues toward a comprehensive mechanistic understanding of integrin-directed signaling during PrCa progression toward a NE phenotype.
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Affiliation(s)
- Fabio Quaglia
- Prostate Cancer Discovery and Development Program, Thomas Jefferson University, Philadelphia, PA, USA
- Department of Pharmacology, Physiology, and Cancer Biology, Thomas Jefferson University, Philadelphia, PA, USA
| | - Shiv Ram Krishn
- Prostate Cancer Discovery and Development Program, Thomas Jefferson University, Philadelphia, PA, USA
- Department of Pharmacology, Physiology, and Cancer Biology, Thomas Jefferson University, Philadelphia, PA, USA
| | - Khalid Sossey-Alaoui
- Department of Medicine, School of Medicine, MetroHealth Medical Center, Rammelkamp Center for Research, Case Western Reserve University, Cleveland, OH, USA
| | - Priyanka Shailendra Rana
- Department of Medicine, School of Medicine, MetroHealth Medical Center, Rammelkamp Center for Research, Case Western Reserve University, Cleveland, OH, USA
| | - Elzbieta Pluskota
- Cardiovascular and Metabolic Sciences Department, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, USA
| | - Pyung Hun Park
- Prostate Cancer Discovery and Development Program, Thomas Jefferson University, Philadelphia, PA, USA
- Department of Pharmacology, Physiology, and Cancer Biology, Thomas Jefferson University, Philadelphia, PA, USA
| | - Christopher D Shields
- Prostate Cancer Discovery and Development Program, Thomas Jefferson University, Philadelphia, PA, USA
- Department of Pharmacology, Physiology, and Cancer Biology, Thomas Jefferson University, Philadelphia, PA, USA
| | - Stephen Lin
- Prostate Cancer Discovery and Development Program, Thomas Jefferson University, Philadelphia, PA, USA
- Department of Pharmacology, Physiology, and Cancer Biology, Thomas Jefferson University, Philadelphia, PA, USA
| | - Peter McCue
- Department of Pathology, Thomas Jefferson University, Philadelphia, PA, USA
| | - Andrew V Kossenkov
- Center for Systems and Computational Biology, Wistar Institute, Philadelphia, PA, USA
| | - Yanqing Wang
- Department of Pharmacology and Therapeutics, Roswell Park Comprehensive Cancer Center, Buffalo, NY, USA
| | - David W Goodrich
- Department of Pharmacology and Therapeutics, Roswell Park Comprehensive Cancer Center, Buffalo, NY, USA
| | - Sheng-Yu Ku
- Department of Medical Oncology, Dana-Farber Cancer Institute and Harvard Medical School, Boston, MA, USA
| | - Himisha Beltran
- Department of Medical Oncology, Dana-Farber Cancer Institute and Harvard Medical School, Boston, MA, USA
| | - William K Kelly
- Department of Medical Oncology, Thomas Jefferson University, Philadelphia, PA, USA
| | - Eva Corey
- Department of Urology, University of Washington, Seattle, WA, USA
| | - Maja Klose
- Institute of Neurochemistry, Biocenter, Medical University of Innsbruck, Innsbruck, Austria
| | - Christine Bandtlow
- Institute of Neurochemistry, Biocenter, Medical University of Innsbruck, Innsbruck, Austria
| | - Qin Liu
- Molecular and Cellular Oncogenesis Program, The Wistar Institute, Philadelphia, PA, USA
| | - Dario C Altieri
- Immunology, Microenvironment and Metastasis Program, The Wistar Institute, Philadelphia, PA, USA
| | - Edward F Plow
- Cardiovascular and Metabolic Sciences Department, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, USA
| | - Lucia R Languino
- Prostate Cancer Discovery and Development Program, Thomas Jefferson University, Philadelphia, PA, USA.
- Department of Pharmacology, Physiology, and Cancer Biology, Thomas Jefferson University, Philadelphia, PA, USA.
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13
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Paes de Faria J, Vale-Silva RS, Fässler R, Werner HB, Relvas JB. Pinch2 regulates myelination in the mouse central nervous system. Development 2022; 149:275524. [DOI: 10.1242/dev.200597] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2022] [Accepted: 05/16/2022] [Indexed: 11/20/2022]
Abstract
ABSTRACT
The extensive morphological changes of oligodendrocytes during axon ensheathment and myelination involve assembly of the Ilk-Parvin-Pinch (IPP) heterotrimeric complex of proteins to relay essential mechanical and biochemical signals between integrins and the actin cytoskeleton. Binding of Pinch1 and Pinch2 isoforms to Ilk is mutually exclusive and allows the formation of distinct IPP complexes with specific signaling properties. Using tissue-specific conditional gene ablation in mice, we reveal an essential role for Pinch2 during central nervous system myelination. Unlike Pinch1 gene ablation, loss of Pinch2 in oligodendrocytes results in hypermyelination and in the formation of pathological myelin outfoldings in white matter regions. These structural changes concur with inhibition of Rho GTPase RhoA and Cdc42 activities and phenocopy aspects of myelin pathology observed in corresponding mouse mutants. We propose a dual role for Pinch2 in preventing an excess of myelin wraps through RhoA-dependent control of membrane growth and in fostering myelin stability via Cdc42-dependent organization of cytoskeletal septins. Together, these findings indicate that IPP complexes containing Pinch2 act as a crucial cell-autonomous molecular hub ensuring synchronous control of key signaling networks during developmental myelination.
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Affiliation(s)
- Joana Paes de Faria
- Department of Neurobiology and Neurological Disease, Glial Cell Biology Laboratory, Instituto de Biologia Molecular e Celular (IBMC), Universidade do Porto 1 , 4200-135 Porto , Portugal
- Department of Neurobiology and Neurological Disease, Glial Cell Biology Laboratory, Instituto de Investigação e Inovação em Saúde (i3S), Universidade do Porto 2 , 4200-135 Porto , Portugal
| | - Raquel S. Vale-Silva
- Department of Neurobiology and Neurological Disease, Glial Cell Biology Laboratory, Instituto de Biologia Molecular e Celular (IBMC), Universidade do Porto 1 , 4200-135 Porto , Portugal
- Department of Neurobiology and Neurological Disease, Glial Cell Biology Laboratory, Instituto de Investigação e Inovação em Saúde (i3S), Universidade do Porto 2 , 4200-135 Porto , Portugal
- Instituto de Ciências Biomédicas Abel Salazar (ICBAS), Universidade do Porto 3 , 4050-313 Porto , Portugal
| | - Reinhard Fässler
- Department of Molecular Medicine, Max Planck Institute of Biochemistry 4 , 82152 Martinsried , Germany
| | - Hauke B. Werner
- Max Planck Institute of Experimental Medicine 5 Department of Neurogenetics , , D-37075 Gottingen , Germany
| | - João B. Relvas
- Department of Neurobiology and Neurological Disease, Glial Cell Biology Laboratory, Instituto de Biologia Molecular e Celular (IBMC), Universidade do Porto 1 , 4200-135 Porto , Portugal
- Department of Neurobiology and Neurological Disease, Glial Cell Biology Laboratory, Instituto de Investigação e Inovação em Saúde (i3S), Universidade do Porto 2 , 4200-135 Porto , Portugal
- Faculty of Medicine, Universidade do Porto 6 Department of Biomedicine , , 4200-319 Porto , Portugal
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14
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Integrin Regulators in Neutrophils. Cells 2022; 11:cells11132025. [PMID: 35805108 PMCID: PMC9266208 DOI: 10.3390/cells11132025] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Revised: 06/17/2022] [Accepted: 06/22/2022] [Indexed: 02/01/2023] Open
Abstract
Neutrophils are the most abundant leukocytes in humans and are critical for innate immunity and inflammation. Integrins are critical for neutrophil functions, especially for their recruitment to sites of inflammation or infections. Integrin conformational changes during activation have been heavily investigated but are still not fully understood. Many regulators, such as talin, Rap1-interacting adaptor molecule (RIAM), Rap1, and kindlin, are critical for integrin activation and might be potential targets for integrin-regulating drugs in treating inflammatory diseases. In this review, we outline integrin activation regulators in neutrophils with a focus on the above critical regulators, as well as newly discovered modulators that are involved in integrin activation.
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15
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LFA1 Activation: Insights from a Single-Molecule Approach. Cells 2022; 11:cells11111751. [PMID: 35681446 PMCID: PMC9179313 DOI: 10.3390/cells11111751] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2022] [Revised: 05/23/2022] [Accepted: 05/24/2022] [Indexed: 02/04/2023] Open
Abstract
Integrin LFA1 is a cell adhesion receptor expressed exclusively in leukocytes, and plays crucial roles in lymphocyte trafficking, antigen recognition, and effector functions. Since the discovery that the adhesiveness of LFA1 can be dynamically changed upon stimulation, one challenge has been understanding how integrins are regulated by inside-out signaling coupled with macromolecular conformational changes, as well as ligand bindings that transduce signals from the extracellular domain to the cytoplasm in outside-in signaling. The small GTPase Rap1 and integrin adaptor proteins talin1 and kindlin-3 have been recognized as critical molecules for integrin activation. However, their cooperative regulation of integrin adhesiveness in lymphocytes requires further research. Recent advances in single-molecule imaging techniques have revealed dynamic molecular processes in real-time and provided insight into integrin activation in cellular environments. This review summarizes integrin regulation and discusses new findings regarding the bidirectionality of LFA1 activation and signaling processes in lymphocytes.
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16
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Ma L, Tian Y, Qian T, Li W, Liu C, Chu B, Kong Q, Cai R, Bai P, Ma L, Deng Y, Tian R, Wu C, Sun Y. Kindlin-2 promotes Src-mediated tyrosine phosphorylation of androgen receptor and contributes to breast cancer progression. Cell Death Dis 2022; 13:482. [PMID: 35595729 PMCID: PMC9122951 DOI: 10.1038/s41419-022-04945-z] [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: 09/22/2021] [Revised: 05/10/2022] [Accepted: 05/12/2022] [Indexed: 12/14/2022]
Abstract
Androgen receptor (AR) signaling plays important roles in breast cancer progression. We show here that Kindlin-2, a focal adhesion protein, is critically involved in the promotion of AR signaling and breast cancer progression. Kindlin-2 physically associates with AR and Src through its two neighboring domains, namely F1 and F0 domains, resulting in formation of a Kindlin-2-AR-Src supramolecular complex and consequently facilitating Src-mediated AR Tyr-534 phosphorylation and signaling. Depletion of Kindlin-2 was sufficient to suppress Src-mediated AR Tyr-534 phosphorylation and signaling, resulting in diminished breast cancer cell proliferation and migration. Re-expression of wild-type Kindlin-2, but not AR-binding-defective or Src-binding-defective mutant forms of Kindlin-2, in Kindlin-2-deficient cells restored AR Tyr-534 phosphorylation, signaling, breast cancer cell proliferation and migration. Furthermore, re-introduction of phosphor-mimic mutant AR-Y534D, but not wild-type AR reversed Kindlin-2 deficiency-induced inhibition of AR signaling and breast cancer progression. Finally, using a genetic knockout strategy, we show that ablation of Kindlin-2 from mammary tumors in mouse significantly reduced AR Tyr-534 phosphorylation, breast tumor progression and metastasis in vivo. Our results suggest a critical role of Kindlin-2 in promoting breast cancer progression and shed light on the molecular mechanism through which it functions in this process.
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Affiliation(s)
- Luyao Ma
- grid.263817.90000 0004 1773 1790Department of Biology, School of Life Sciences, Guangdong Provincial Key Laboratory of Cell Microenvironment and Disease Research, Shenzhen Key Laboratory of Cell Microenvironment, Southern University of Science and Technology, Shenzhen, 518055 China
| | - Yeteng Tian
- grid.263817.90000 0004 1773 1790Department of Biology, School of Life Sciences, Guangdong Provincial Key Laboratory of Cell Microenvironment and Disease Research, Shenzhen Key Laboratory of Cell Microenvironment, Southern University of Science and Technology, Shenzhen, 518055 China
| | - Tao Qian
- grid.263817.90000 0004 1773 1790Department of Biology, School of Life Sciences, Guangdong Provincial Key Laboratory of Cell Microenvironment and Disease Research, Shenzhen Key Laboratory of Cell Microenvironment, Southern University of Science and Technology, Shenzhen, 518055 China
| | - Wenjun Li
- grid.263817.90000 0004 1773 1790Department of Biology, School of Life Sciences, Guangdong Provincial Key Laboratory of Cell Microenvironment and Disease Research, Shenzhen Key Laboratory of Cell Microenvironment, Southern University of Science and Technology, Shenzhen, 518055 China
| | - Chengmin Liu
- grid.263817.90000 0004 1773 1790Department of Biology, School of Life Sciences, Guangdong Provincial Key Laboratory of Cell Microenvironment and Disease Research, Shenzhen Key Laboratory of Cell Microenvironment, Southern University of Science and Technology, Shenzhen, 518055 China
| | - Bizhu Chu
- grid.263817.90000 0004 1773 1790Department of Chemistry, Southern University of Science and Technology, Shenzhen, 518055 China
| | - Qian Kong
- grid.263817.90000 0004 1773 1790Department of Chemistry, Southern University of Science and Technology, Shenzhen, 518055 China
| | - Renwei Cai
- grid.263817.90000 0004 1773 1790Department of Biology, School of Life Sciences, Guangdong Provincial Key Laboratory of Cell Microenvironment and Disease Research, Shenzhen Key Laboratory of Cell Microenvironment, Southern University of Science and Technology, Shenzhen, 518055 China
| | - Panzhu Bai
- grid.263817.90000 0004 1773 1790Department of Biology, School of Life Sciences, Guangdong Provincial Key Laboratory of Cell Microenvironment and Disease Research, Shenzhen Key Laboratory of Cell Microenvironment, Southern University of Science and Technology, Shenzhen, 518055 China
| | - Lisha Ma
- grid.263817.90000 0004 1773 1790Department of Biology, School of Life Sciences, Guangdong Provincial Key Laboratory of Cell Microenvironment and Disease Research, Shenzhen Key Laboratory of Cell Microenvironment, Southern University of Science and Technology, Shenzhen, 518055 China
| | - Yi Deng
- grid.263817.90000 0004 1773 1790Department of Biology, School of Life Sciences, Guangdong Provincial Key Laboratory of Cell Microenvironment and Disease Research, Shenzhen Key Laboratory of Cell Microenvironment, Southern University of Science and Technology, Shenzhen, 518055 China
| | - Ruijun Tian
- grid.263817.90000 0004 1773 1790Department of Chemistry, Southern University of Science and Technology, Shenzhen, 518055 China
| | - Chuanyue Wu
- grid.21925.3d0000 0004 1936 9000Department of Pathology, School of Medicine and University of Pittsburgh Cancer Institute, University of Pittsburgh, Pittsburgh, PA 15260 USA
| | - Ying Sun
- grid.263817.90000 0004 1773 1790Department of Biology, School of Life Sciences, Guangdong Provincial Key Laboratory of Cell Microenvironment and Disease Research, Shenzhen Key Laboratory of Cell Microenvironment, Southern University of Science and Technology, Shenzhen, 518055 China
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17
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Guenther C. β2-Integrins – Regulatory and Executive Bridges in the Signaling Network Controlling Leukocyte Trafficking and Migration. Front Immunol 2022; 13:809590. [PMID: 35529883 PMCID: PMC9072638 DOI: 10.3389/fimmu.2022.809590] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2021] [Accepted: 03/11/2022] [Indexed: 12/12/2022] Open
Abstract
Leukocyte trafficking is an essential process of immunity, occurring as leukocytes travel within the bloodstream and as leukocyte migration within tissues. While it is now established that leukocytes can utilize the mesenchymal migration mode or amoeboid migration mode, differences in the migratory behavior of leukocyte subclasses and how these are realized on a molecular level in each subclass is not fully understood. To outline these differences, first migration modes and their dependence on parameters of the extracellular environments will be explained, as well as the intracellular molecular machinery that powers migration in general. Extracellular parameters are detected by adhesion receptors such as integrins. β2-integrins are surface receptors exclusively expressed on leukocytes and are essential for leukocytes exiting the bloodstream, as well as in mesenchymal migration modes, however, integrins are dispensable for the amoeboid migration mode. Additionally, the balance of different RhoGTPases – which are downstream of surface receptor signaling, including integrins – mediate formation of membrane structures as well as actin dynamics. Individual leukocyte subpopulations have been shown to express distinct RhoGTPase profiles along with their differences in migration behavior, which will be outlined. Emerging aspects of leukocyte migration include signal transduction from integrins via actin to the nucleus that regulates DNA status, gene expression profiles and ultimately leukocyte migratory phenotypes, as well as altered leukocyte migration in tumors, which will be touched upon.
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Affiliation(s)
- Carla Guenther
- Department of Veterinary Biosciences, University of Helsinki, Helsinki, Finland
- Department of Molecular Immunology, Research Institute for Microbial Diseases, Osaka University, Osaka, Japan
- Laboratory of Molecular Immunology, Immunology Frontier Research Center, Osaka University, Osaka, Japan
- *Correspondence: Carla Guenther,
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18
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Ripamonti M, Wehrle-Haller B, de Curtis I. Paxillin: A Hub for Mechano-Transduction from the β3 Integrin-Talin-Kindlin Axis. Front Cell Dev Biol 2022; 10:852016. [PMID: 35450290 PMCID: PMC9016114 DOI: 10.3389/fcell.2022.852016] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2022] [Accepted: 03/14/2022] [Indexed: 01/11/2023] Open
Abstract
Focal adhesions are specialized integrin-dependent adhesion complexes, which ensure cell anchoring to the extracellular matrix. Focal adhesions also function as mechano-signaling platforms by perceiving and integrating diverse physical and (bio)chemical cues of their microenvironment, and by transducing them into intracellular signaling for the control of cell behavior. The fundamental biological mechanism of creating intracellular signaling in response to changes in tensional forces appears to be tightly linked to paxillin recruitment and binding to focal adhesions. Interestingly, the tension-dependent nature of the paxillin binding to adhesions, combined with its scaffolding function, suggests a major role of this protein in integrating multiple signals from the microenvironment, and accordingly activating diverse molecular responses. This minireview offers an overview of the molecular bases of the mechano-sensitivity and mechano-signaling capacity of core focal adhesion proteins, and highlights the role of paxillin as a key component of the mechano-transducing machinery based on the interaction of cells to substrates activating the β3 integrin-talin1-kindlin.
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Affiliation(s)
- Marta Ripamonti
- Division of Neuroscience, San Raffaele Scientific Institute and Vita-Salute San Raffaele University, Milano, Italy
| | - Bernhard Wehrle-Haller
- Department of Cell Physiology and Metabolism, University of Geneva, Centre Médical Universitaire, Geneva, Switzerland
| | - Ivan de Curtis
- Division of Neuroscience, San Raffaele Scientific Institute and Vita-Salute San Raffaele University, Milano, Italy
- *Correspondence: Ivan de Curtis,
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19
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Banerjee S, Nara R, Chakraborty S, Chowdhury D, Haldar S. Integrin Regulated Autoimmune Disorders: Understanding the Role of Mechanical Force in Autoimmunity. Front Cell Dev Biol 2022; 10:852878. [PMID: 35372360 PMCID: PMC8971850 DOI: 10.3389/fcell.2022.852878] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2022] [Accepted: 02/08/2022] [Indexed: 11/13/2022] Open
Abstract
The pathophysiology of autoimmune disorders is multifactorial, where immune cell migration, adhesion, and lymphocyte activation play crucial roles in its progression. These immune processes are majorly regulated by adhesion molecules at cell–extracellular matrix (ECM) and cell–cell junctions. Integrin, a transmembrane focal adhesion protein, plays an indispensable role in these immune cell mechanisms. Notably, integrin is regulated by mechanical force and exhibit bidirectional force transmission from both the ECM and cytosol, regulating the immune processes. Recently, integrin mechanosensitivity has been reported in different immune cell processes; however, the underlying mechanics of these integrin-mediated mechanical processes in autoimmunity still remains elusive. In this review, we have discussed how integrin-mediated mechanotransduction could be a linchpin factor in the causation and progression of autoimmune disorders. We have provided an insight into how tissue stiffness exhibits a positive correlation with the autoimmune diseases’ prevalence. This provides a plausible connection between mechanical load and autoimmunity. Overall, gaining insight into the role of mechanical force in diverse immune cell processes and their dysregulation during autoimmune disorders will open a new horizon to understand this physiological anomaly.
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20
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Wang W, Rana PS, Alkrekshi A, Bialkowska K, Markovic V, Schiemann WP, Plow EF, Pluskota E, Sossey-Alaoui K. Targeted Deletion of Kindlin-2 in Mouse Mammary Glands Inhibits Tumor Growth, Invasion, and Metastasis Downstream of a TGF-β/EGF Oncogenic Signaling Pathway. Cancers (Basel) 2022; 14:cancers14030639. [PMID: 35158908 PMCID: PMC8833458 DOI: 10.3390/cancers14030639] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2022] [Revised: 01/23/2022] [Accepted: 01/25/2022] [Indexed: 12/04/2022] Open
Abstract
Breast cancer (BC) is one of the leading causes of cancer-related deaths due in part to its invasive and metastatic properties. Kindlin-2 (FERMT2) is associated with the pathogenesis of several cancers. Although the role of Kindlin-2 in regulating the invasion-metastasis cascade in BC is widely documented, its function in BC initiation and progression remains to be fully elucidated. Accordingly, we generated a floxed mouse strain by targeting the Fermt2 (K2lox/lox) locus, followed by tissue-specific deletion of Kindlin-2 in the myoepithelial compartment of the mammary glands by crossing the K2lox/lox mice with K14-Cre mice. Loss of Kindlin-2 in mammary epithelial cells (MECs) showed no deleterious effects on mammary gland development, fertility, and lactation in mice bearing Kindlin-2-deletion. However, in a syngeneic mouse model of BC, mammary gland, specific knockout of Kindlin-2 inhibited the growth and metastasis of murine E0771 BC cells inoculated into the mammary fat pads. However, injecting the E0771 cells into the lateral tail vein of Kindlin-2-deleted mice had no effect on tumor colonization in the lungs, thereby establishing a critical role of MEC Kindlin-2 in supporting BC tumor growth and metastasis. Mechanistically, we found the MEC Kindlin-2-mediated inhibition of tumor growth and metastasis is accomplished through its regulation of the TGF-β/ERK MAP kinase signaling axis. Thus, Kindlin-2 within the mammary gland microenvironment facilitates the progression and metastasis of BC.
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Affiliation(s)
- Wei Wang
- Department of Medicine, Case Western Reserve University, Cleveland, OH 44106, USA; (W.W.); (P.S.R.); (A.A.)
- Department of Medicine, MetroHealth Medical Center, Cleveland, OH 44109, USA;
| | - Priyanka S. Rana
- Department of Medicine, Case Western Reserve University, Cleveland, OH 44106, USA; (W.W.); (P.S.R.); (A.A.)
- Department of Medicine, MetroHealth Medical Center, Cleveland, OH 44109, USA;
| | - Akram Alkrekshi
- Department of Medicine, Case Western Reserve University, Cleveland, OH 44106, USA; (W.W.); (P.S.R.); (A.A.)
- Department of Medicine, MetroHealth Medical Center, Cleveland, OH 44109, USA;
| | - Katarzyna Bialkowska
- Department of Cardiovascular and Metabolic Sciences, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, USA; (K.B.); (E.F.P.)
| | - Vesna Markovic
- Department of Medicine, MetroHealth Medical Center, Cleveland, OH 44109, USA;
| | - William P. Schiemann
- Case Comprehensive Cancer Center, Case Western Reserve University, Cleveland, OH 44106, USA;
| | - Edward F. Plow
- Department of Cardiovascular and Metabolic Sciences, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, USA; (K.B.); (E.F.P.)
| | - Elzbieta Pluskota
- Department of Cardiovascular and Metabolic Sciences, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, USA; (K.B.); (E.F.P.)
- Correspondence: (E.P.); (K.S.-A.)
| | - Khalid Sossey-Alaoui
- Department of Medicine, Case Western Reserve University, Cleveland, OH 44106, USA; (W.W.); (P.S.R.); (A.A.)
- Department of Medicine, MetroHealth Medical Center, Cleveland, OH 44109, USA;
- Case Comprehensive Cancer Center, Case Western Reserve University, Cleveland, OH 44106, USA;
- Correspondence: (E.P.); (K.S.-A.)
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21
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Palmere RD, Case DA, Nieuwkoop AJ. Simulations of Kindlin-2 PIP binding domains reveal protonation-dependent membrane binding modes. Biophys J 2021; 120:5504-5512. [PMID: 34813727 DOI: 10.1016/j.bpj.2021.11.021] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2021] [Revised: 09/15/2021] [Accepted: 11/17/2021] [Indexed: 11/19/2022] Open
Abstract
Kindlin-2, a member of the Kindlin family of peripheral membrane proteins, is important for integrin activation and stabilization of epidermal growth factor receptor. It associates with the cytoplasmic face of the plasma membrane via dedicated phosphatidylinositol phosphate binding domains located in the N-terminal F0 and Pleckstrin Homology domains. These domains have binding affinity for phosphatidylinositol 4,5-bisphosphate and, to a greater degree, phosphatidylinositol 3,4,5-trisphosphate. The biological significance of the differential binding of these phosphatidylinositol phosphates to Kindlin-2 and the mechanism by which they activate Kindlin-2 are not well understood. Recently, ssNMR identified the predominant protonation states of phosphatidylinositol 4,5-bisphosphate and phosphatidylinositol 3,4,5-trisphosphate near physiological pH in the presence of anionic lipids. Here, we perform atomistic simulation of the bound state of the Pleckstrin Homology and F0 domains of Kindlin-2 at membranes containing phosphatidylinositol 4,5-bisphosphate/phosphatidylinositol 3,4,5-trisphosphate with differing protonation states. This computational approach demonstrates that these two phosphatidylinositol phosphates differently modulate Kindlin-2 subdomain binding in a protonation-state-dependent manner. We speculate these variations in binding mode provide a mechanism for intracellular pH and Ca2+ influx to control the membrane binding behavior and activity of Kindlin-2.
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Affiliation(s)
- Robert D Palmere
- Department of Chemistry and Chemical Biology, School of Arts and Sciences, Rutgers University, Piscataway, New Jersey
| | - David A Case
- Department of Chemistry and Chemical Biology, School of Arts and Sciences, Rutgers University, Piscataway, New Jersey
| | - Andrew J Nieuwkoop
- Department of Chemistry and Chemical Biology, School of Arts and Sciences, Rutgers University, Piscataway, New Jersey.
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22
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Salomaa SI, Miihkinen M, Kremneva E, Paatero I, Lilja J, Jacquemet G, Vuorio J, Antenucci L, Kogan K, Hassani Nia F, Hollos P, Isomursu A, Vattulainen I, Coffey ET, Kreienkamp HJ, Lappalainen P, Ivaska J. SHANK3 conformation regulates direct actin binding and crosstalk with Rap1 signaling. Curr Biol 2021; 31:4956-4970.e9. [PMID: 34610274 DOI: 10.1016/j.cub.2021.09.022] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2021] [Revised: 07/09/2021] [Accepted: 09/07/2021] [Indexed: 12/15/2022]
Abstract
Actin-rich cellular protrusions direct versatile biological processes from cancer cell invasion to dendritic spine development. The stability, morphology, and specific biological functions of these protrusions are regulated by crosstalk between three main signaling axes: integrins, actin regulators, and small guanosine triphosphatases (GTPases). SHANK3 is a multifunctional scaffold protein, interacting with several actin-binding proteins and a well-established autism risk gene. Recently, SHANK3 was demonstrated to sequester integrin-activating small GTPases Rap1 and R-Ras to inhibit integrin activity via its Shank/ProSAP N-terminal (SPN) domain. Here, we demonstrate that, in addition to scaffolding actin regulators and actin-binding proteins, SHANK3 interacts directly with actin through its SPN domain. Molecular simulations and targeted mutagenesis of the SPN-ankyrin repeat region (ARR) interface reveal that actin binding is inhibited by an intramolecular closed conformation of SHANK3, where the adjacent ARR domain covers the actin-binding interface of the SPN domain. Actin and Rap1 compete with each other for binding to SHANK3, and mutation of SHANK3, resulting in reduced actin binding, augments inhibition of Rap1-mediated integrin activity. This dynamic crosstalk has functional implications for cell morphology and integrin activity in cancer cells. In addition, SHANK3-actin interaction regulates dendritic spine morphology in neurons and autism-linked phenotypes in vivo.
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Affiliation(s)
- Siiri I Salomaa
- Turku Bioscience Centre, University of Turku and Åbo Akademi University, Tykistökatu 6, Turku 20520, Finland
| | - Mitro Miihkinen
- Turku Bioscience Centre, University of Turku and Åbo Akademi University, Tykistökatu 6, Turku 20520, Finland
| | - Elena Kremneva
- HiLIFE Institute of Biotechnology, University of Helsinki, Viikinkaari 5B, PO Box 56, 00014 Helsinki, Finland
| | - Ilkka Paatero
- Turku Bioscience Centre, University of Turku and Åbo Akademi University, Tykistökatu 6, Turku 20520, Finland
| | - Johanna Lilja
- Turku Bioscience Centre, University of Turku and Åbo Akademi University, Tykistökatu 6, Turku 20520, Finland
| | - Guillaume Jacquemet
- Turku Bioscience Centre, University of Turku and Åbo Akademi University, Tykistökatu 6, Turku 20520, Finland; Faculty of Science and Engineering, Cell Biology, Åbo Akademi University, Tykistökatu 6, Turku 20520, Finland
| | - Joni Vuorio
- Department of Physics, University of Helsinki, Gustaf Hällströmin katu 2, Helsinki, Finland
| | - Lina Antenucci
- HiLIFE Institute of Biotechnology, University of Helsinki, Viikinkaari 5B, PO Box 56, 00014 Helsinki, Finland
| | - Konstantin Kogan
- HiLIFE Institute of Biotechnology, University of Helsinki, Viikinkaari 5B, PO Box 56, 00014 Helsinki, Finland
| | - Fatemeh Hassani Nia
- Institute for Human Genetics, University Medical Center Hamburg-Eppendorf, Martinistraße 52, 20251 Hamburg, Germany
| | - Patrik Hollos
- Turku Bioscience Centre, University of Turku and Åbo Akademi University, Tykistökatu 6, Turku 20520, Finland
| | - Aleksi Isomursu
- Turku Bioscience Centre, University of Turku and Åbo Akademi University, Tykistökatu 6, Turku 20520, Finland
| | - Ilpo Vattulainen
- Department of Physics, University of Helsinki, Gustaf Hällströmin katu 2, Helsinki, Finland
| | - Eleanor T Coffey
- Turku Bioscience Centre, University of Turku and Åbo Akademi University, Tykistökatu 6, Turku 20520, Finland
| | - Hans-Jürgen Kreienkamp
- Institute for Human Genetics, University Medical Center Hamburg-Eppendorf, Martinistraße 52, 20251 Hamburg, Germany
| | - Pekka Lappalainen
- HiLIFE Institute of Biotechnology, University of Helsinki, Viikinkaari 5B, PO Box 56, 00014 Helsinki, Finland
| | - Johanna Ivaska
- Turku Bioscience Centre, University of Turku and Åbo Akademi University, Tykistökatu 6, Turku 20520, Finland; Department of Life Technologies, University of Turku, Tykistökatu 6, Turku 20520, Finland.
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23
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Klapproth S, Richter K, Türk C, Bock T, Bromberger T, Dominik J, Huck K, Pfaller K, Hess MW, Reichel CA, Krüger M, Nakchbandi IA, Moser M. Low kindlin-3 levels in osteoclasts of kindlin-3 hypomorphic mice result in osteopetrosis due to leaky sealing zones. J Cell Sci 2021; 134:272627. [PMID: 34704600 DOI: 10.1242/jcs.259040] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2021] [Accepted: 10/19/2021] [Indexed: 12/14/2022] Open
Abstract
Osteoclasts form special integrin-mediated adhesion structures called sealing zones that enable them to adhere to and resorb bone. Sealing zones consist of densely packed podosomes tightly interconnected by actin fibers. Their formation requires the presence of the hematopoietic integrin regulator kindlin-3 (also known as Fermt3). In this study, we investigated osteoclasts and their adhesion structures in kindlin-3 hypomorphic mice expressing only 5-10% of the kindlin-3 level of wild-type mice. Low kindlin-3 expression reduces integrin activity, results in impaired osteoclast adhesion and signaling, and delays cell spreading. Despite these defects, in vitro-generated kindlin-3-hypomorphic osteoclast-like cells arrange their podosomes into adhesion patches and belts, but their podosome and actin organization is abnormal. Remarkably, kindlin-3-hypomorphic osteoclasts form sealing zones when cultured on calcified matrix in vitro and on bone surface in vivo. However, functional assays, immunohistochemical staining and electron micrographs of bone sections showed that they fail to seal the resorption lacunae properly, which is required for secreted proteinases to digest bone matrix. This results in mild osteopetrosis. Our study reveals a new, hitherto understudied function of kindlin-3 as an essential organizer of integrin-mediated adhesion structures, such as sealing zones.
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Affiliation(s)
- Sarah Klapproth
- Institute of Experimental Hematology, School of Medicine, Technical University Munich, D-81675 Munich, Germany
| | - Karsten Richter
- Central Unit Electron Microscopy, German Cancer Research Center (DKFZ), D-69120 Heidelberg, Germany
| | - Clara Türk
- CECAD Research Center, Institute for Genetics, University of Cologne, D-50931 Cologne, Germany
| | - Theresa Bock
- CECAD Research Center, Institute for Genetics, University of Cologne, D-50931 Cologne, Germany
| | - Thomas Bromberger
- Institute of Experimental Hematology, School of Medicine, Technical University Munich, D-81675 Munich, Germany
| | - Julian Dominik
- Walter Brendel Centre of Experimental Medicine, Ludwig-Maximilians-University Munich, 81377 Munich, Germany.,Department of Otorhinolaryngology, Ludwig-Maximilians-University Munich, 81377 Munich, Germany
| | - Kathrin Huck
- Institute of Immunology, University of Heidelberg, D-69120 Heidelberg, Germany
| | - Kristian Pfaller
- Institute of Histology and Embryology, Medical University Innsbruck, A-6020 Innsbruck, Austria
| | - Michael W Hess
- Institute of Histology and Embryology, Medical University Innsbruck, A-6020 Innsbruck, Austria
| | - Christoph A Reichel
- Walter Brendel Centre of Experimental Medicine, Ludwig-Maximilians-University Munich, 81377 Munich, Germany.,Department of Otorhinolaryngology, Ludwig-Maximilians-University Munich, 81377 Munich, Germany
| | - Marcus Krüger
- CECAD Research Center, Institute for Genetics, University of Cologne, D-50931 Cologne, Germany.,Center for Molecular Medicine (CMMC), University of Cologne, D-50931 Cologne, Germany
| | - Inaam A Nakchbandi
- Institute of Immunology, University of Heidelberg, D-69120 Heidelberg, Germany.,Max-Planck Institute of Biochemistry, D-82152 Martinsried, Germany
| | - Markus Moser
- Institute of Experimental Hematology, School of Medicine, Technical University Munich, D-81675 Munich, Germany.,Max-Planck Institute of Biochemistry, D-82152 Martinsried, Germany
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24
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Ying J, Wang Q, Lu L, Liu J, Guo R, Hu H, Jiang H, Qi F. Fermitin family homolog 2 (Kindlin-2) affects vascularization during the wound healing process by regulating the Wnt/β-catenin signaling pathway in vascular endothelial cells. Bioengineered 2021; 12:4654-4665. [PMID: 34338144 PMCID: PMC8806626 DOI: 10.1080/21655979.2021.1957526] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
Kindlin-2 is a member of the FERM-containing cytoskeletal protein family that regulates cell–matrix interactions. Previous studies have shown that Kindlin-2 recruits focal adhesion proteins and regulates integration by binding to the focal adhesion region of the integrin β-segment. Although Kindlin-2 has been reported to be involved in various skin diseases and many kinds of tumors, its role in the skin wound healing process remains unclear. The aim of the present study was to investigate the role of Kindlin-2 in the regulation of wound healing. The effects of Kindlin-2 on wound healing were studied by a wound healing model, kindlin-2 (±) mice. The effects of Kindlin-2 on cell migration, cellular tube formation, and cell adhesion and spreading were evaluated in human umbilical vein endothelial cells (HUVECs) with downregulated Kindlin-2 expression. We found that the expression of kindlin-2 was elevated in wound healing tissues and that interfering with the expression of Kindlin-2 delayed the wound healing process and reduced neovascularization. We found that the wound healing of kindlin-2 (±) mice was delayed, with a decreased number of new blood vessels. Furthermore, depletion of Kindlin-2 impaired HUVEC spreading, migration and tube formation. Intriguingly, we found that kindlin-2 binds to β-catenin in the Wnt/β-catenin signaling pathway and cooperates with β-catenin to enter the nucleus from the cytoplasm, activating the downstream Wnt/β-catenin signaling pathway. Taken together, these results help to elucidate the mechanism of Kindlin-2 in the regulation of the wound healing process and provide a theoretical basis for further study of wound healing and abnormal healing.
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Affiliation(s)
- Jianghui Ying
- Department of Plastic Surgery, Shanghai East Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Qiang Wang
- Department of Plastic Surgery, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Lu Lu
- Department of Plastic Surgery, Shanghai East Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Jiaqi Liu
- Department of Plastic Surgery, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Rong Guo
- Department of Plastic Surgery, Shanghai East Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Hao Hu
- Department of Plastic Surgery, Shanghai East Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Hua Jiang
- Department of Plastic Surgery, Shanghai East Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Fazhi Qi
- Department of Plastic Surgery, Zhongshan Hospital, Fudan University, Shanghai, China
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25
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Dadwal N, Mix C, Reinhold A, Witte A, Freund C, Schraven B, Kliche S. The Multiple Roles of the Cytosolic Adapter Proteins ADAP, SKAP1 and SKAP2 for TCR/CD3 -Mediated Signaling Events. Front Immunol 2021; 12:703534. [PMID: 34295339 PMCID: PMC8290198 DOI: 10.3389/fimmu.2021.703534] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Accepted: 06/21/2021] [Indexed: 12/24/2022] Open
Abstract
T cells are the key players of the adaptive immune response. They coordinate the activation of other immune cells and kill malignant and virus-infected cells. For full activation T cells require at least two signals. Signal 1 is induced after recognition of MHC/peptide complexes presented on antigen presenting cells (APCs) by the clonotypic TCR (T-cell receptor)/CD3 complex whereas Signal 2 is mediated via the co-stimulatory receptor CD28, which binds to CD80/CD86 molecules that are present on APCs. These signaling events control the activation, proliferation and differentiation of T cells. In addition, triggering of the TCR/CD3 complex induces the activation of the integrin LFA-1 (leukocyte function associated antigen 1) leading to increased ligand binding (affinity regulation) and LFA-1 clustering (avidity regulation). This process is termed "inside-out signaling". Subsequently, ligand bound LFA-1 transmits a signal into the T cells ("outside-in signaling") which enhances T-cell interaction with APCs (adhesion), T-cell activation and T-cell proliferation. After triggering of signal transducing receptors, adapter proteins organize the proper processing of membrane proximal and intracellular signals as well as the activation of downstream effector molecules. Adapter proteins are molecules that lack enzymatic or transcriptional activity and are composed of protein-protein and protein-lipid interacting domains/motifs. They organize and assemble macromolecular complexes (signalosomes) in space and time. Here, we review recent findings regarding three cytosolic adapter proteins, ADAP (Adhesion and Degranulation-promoting Adapter Protein), SKAP1 and SKAP2 (Src Kinase Associated Protein 1 and 2) with respect to their role in TCR/CD3-mediated activation, proliferation and integrin regulation.
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Affiliation(s)
- Nirdosh Dadwal
- Institute of Chemistry and Biochemistry, Freie Universität Berlin, Berlin, Germany
| | - Charlie Mix
- Institute of Molecular and Clinical Immunology, Health Campus Immunology, Infectiology and Inflammation (GCI3), Medical Faculty of the Otto-von-Guericke University, Magdeburg, Germany
| | - Annegret Reinhold
- Institute of Molecular and Clinical Immunology, Health Campus Immunology, Infectiology and Inflammation (GCI3), Medical Faculty of the Otto-von-Guericke University, Magdeburg, Germany
| | - Amelie Witte
- Coordination Center of Clinical Trials, University Medicine Greifswald, Greifswald, Germany
| | - Christian Freund
- Institute of Chemistry and Biochemistry, Freie Universität Berlin, Berlin, Germany
| | - Burkhart Schraven
- Institute of Molecular and Clinical Immunology, Health Campus Immunology, Infectiology and Inflammation (GCI3), Medical Faculty of the Otto-von-Guericke University, Magdeburg, Germany
| | - Stefanie Kliche
- Institute of Molecular and Clinical Immunology, Health Campus Immunology, Infectiology and Inflammation (GCI3), Medical Faculty of the Otto-von-Guericke University, Magdeburg, Germany
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26
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Chen K, Guo L, Wu C. How signaling pathways link extracellular mechano-environment to proline biosynthesis: A hypothesis: PINCH-1 and kindlin-2 sense mechanical signals from extracellular matrix and link them to proline biosynthesis. Bioessays 2021; 43:e2100116. [PMID: 34218442 DOI: 10.1002/bies.202100116] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Revised: 06/20/2021] [Accepted: 06/23/2021] [Indexed: 12/11/2022]
Abstract
We propose a signaling pathway in which cell-extracellular matrix (ECM) adhesion components PINCH-1 and kindlin-2 sense mechanical signals from ECM and link them to proline biosynthesis, a vital metabolic pathway for macromolecule synthesis, redox balance, and ECM remodeling. ECM stiffening promotes PINCH-1 expression via integrin signaling, which suppresses dynamin-related protein 1 (DRP1) expression and mitochondrial fission, resulting in increased kindlin-2 translocation into mitochondria and interaction with Δ1 -pyrroline-5-carboxylate (P5C) reductase 1 (PYCR1). Kindlin-2 interaction with PYCR1 protects the latter from proteolytic degradation, leading to elevated PYCR1 level. Additionally, PINCH-1 promotes P5C synthase (P5CS) expression and P5C synthesis, which, together with increased PYCR1 level, support augmented proline biosynthesis. This signaling pathway is frequently activated in fibrosis and cancer, resulting in increased proline biosynthesis and excessive collagen matrix production, which in turn further promotes ECM stiffening. Targeting this signaling pathway, therefore, may provide an effective strategy for alleviating fibrosis and cancer progression.
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Affiliation(s)
- Keng Chen
- Greater Bay Biomedical InnoCenter, Shenzhen Bay Laboratory, Shenzhen, China
| | - Ling Guo
- Department of Biology, Guangdong Provincial Key Laboratory of Cell Microenvironment and Disease Research, and Shenzhen Key Laboratory of Cell Microenvironment, Southern University of Science and Technology, Shenzhen, China
| | - Chuanyue Wu
- Department of Pathology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
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27
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Bu W, Levitskaya Z, Tan SM, Gao YG. Emerging evidence for kindlin oligomerization and its role in regulating kindlin function. J Cell Sci 2021; 134:256567. [PMID: 33912917 DOI: 10.1242/jcs.256115] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Integrin-mediated cell-extracellular matrix (ECM) interactions play crucial roles in a broad range of physiological and pathological processes. Kindlins are important positive regulators of integrin activation. The FERM-domain-containing kindlin family comprises three members, kindlin-1, kindlin-2 and kindlin-3 (also known as FERMT1, FERMT2 and FERMT3), which share high sequence similarity (identity >50%), as well as domain organization, but exhibit diverse tissue-specific expression patterns and cellular functions. Given the significance of kindlins, analysis of their atomic structures has been an attractive field for decades. Recently, the structures of kindlin and its β-integrin-bound form have been obtained, which greatly advance our understanding of the molecular functions that involve kindlins. In particular, emerging evidence indicates that oligomerization of kindlins might affect their integrin binding and focal adhesion localization, positively or negatively. In this Review, we presented an update on the recent progress of obtaining kindlin structures, and discuss the implication for integrin activation based on kindlin oligomerization, as well as the possible regulation of this process.
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Affiliation(s)
- Wenting Bu
- School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, Singapore637551.,Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China518055
| | - Zarina Levitskaya
- School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, Singapore637551
| | - Suet-Mien Tan
- School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, Singapore637551
| | - Yong-Gui Gao
- School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, Singapore637551.,NTU Institute of Structural Biology, Nanyang Technological University, 59 Nanyang Drive, Singapore639798
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28
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Dudiki T, Mahajan G, Liu H, Zhevlakova I, Bertagnolli C, Nascimento DW, Kothapalli CR, Byzova TV. Kindlin3 regulates biophysical properties and mechanics of membrane to cortex attachment. Cell Mol Life Sci 2021; 78:4003-4018. [PMID: 33783564 PMCID: PMC11071771 DOI: 10.1007/s00018-021-03817-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Revised: 03/01/2021] [Accepted: 03/18/2021] [Indexed: 12/19/2022]
Abstract
Kindlin3 (K3), a FERM domain containing protein expressed in hematopoietic cells controls integrin activation and thus hemostatic and inflammatory responses. However, its role in the mechanics of plasma membrane remains unclear. Here, we show that genetic knockout of K3 in microglia and macrophages resulted in defective plasma membrane tension and membrane blebbing. Atomic force microscopy (AFM) of K3-deficient cells revealed a significant loss in membrane-to-cortex attachment (MCA), and consequently reduced membrane tension. This loss in MCA is amplified by the mislocalization of the cell cortex proteins-ezrin, radixin, and moesin (ERM)-to the plasma membrane of microglia and macrophages. Re-expression of K3 in K3-deficient macrophages rescued the defects and localization of ERMs implying a key role for K3 in MCA. Analysis of two K3 mutants, K3int affecting integrin binding and activation, and K3pxn/act disrupting binding to paxillin and actin but not integrin functions, demonstrated that the role of K3 in membrane mechanics is separate from integrin activation. The K3pxn/act mutant substantially diminished both membrane tension and Yes-associated protein (YAP) translocation to the nucleus, while preserving integrin activation, cell spreading, and migration. Together, our results show that K3 coordinates membrane mechanics, ERM protein recruitment to the membrane, and YAP translocation by linking integrin at the membrane to paxillin and actin of the cytoskeleton. This novel function of K3 is distinct from its role in integrin activation.
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Affiliation(s)
- Tejasvi Dudiki
- Lerner Research Institute, Cleveland Clinic, Cleveland, OH, 44195, USA
| | - Gautam Mahajan
- Chemical and Biomedical Engineering Department, Washkewicz College of Engineering, Cleveland State University, Cleveland, OH, 44115, USA
| | - Huan Liu
- Lerner Research Institute, Cleveland Clinic, Cleveland, OH, 44195, USA
| | - Irina Zhevlakova
- Lerner Research Institute, Cleveland Clinic, Cleveland, OH, 44195, USA
| | - Chase Bertagnolli
- Lerner Research Institute, Cleveland Clinic, Cleveland, OH, 44195, USA
| | | | - Chandrasekhar R Kothapalli
- Chemical and Biomedical Engineering Department, Washkewicz College of Engineering, Cleveland State University, Cleveland, OH, 44115, USA.
| | - Tatiana V Byzova
- Lerner Research Institute, Cleveland Clinic, Cleveland, OH, 44195, USA.
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29
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Qin L, Fu X, Ma J, Lin M, Zhang P, Wang Y, Yan Q, Tao C, Liu W, Tang B, Chen D, Bai X, Cao H, Xiao G. Kindlin-2 mediates mechanotransduction in bone by regulating expression of Sclerostin in osteocytes. Commun Biol 2021; 4:402. [PMID: 33767359 PMCID: PMC7994671 DOI: 10.1038/s42003-021-01950-4] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2020] [Accepted: 03/03/2021] [Indexed: 12/16/2022] Open
Abstract
Osteocytes act as mechanosensors in bone; however, the underlying mechanism remains poorly understood. Here we report that deleting Kindlin-2 in osteocytes causes severe osteopenia and mechanical property defects in weight-bearing long bones, but not in non-weight-bearing calvariae. Kindlin-2 loss in osteocytes impairs skeletal responses to mechanical stimulation in long bones. Control and cKO mice display similar bone loss induced by unloading. However, unlike control mice, cKO mice fail to restore lost bone after reloading. Osteocyte Kindlin-2 deletion impairs focal adhesion (FA) formation, cytoskeleton organization and cell orientation in vitro and in bone. Fluid shear stress dose-dependently increases Kindlin-2 expression and decreases that of Sclerostin by downregulating Smad2/3 in osteocytes; this latter response is abolished by Kindlin-2 ablation. Kindlin-2-deficient osteocytes express abundant Sclerostin, contributing to bone loss in cKO mice. Collectively, we demonstrate an indispensable novel role of Kindlin-2 in maintaining skeletal responses to mechanical stimulation by inhibiting Sclerostin expression during osteocyte mechanotransduction.
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Affiliation(s)
- Lei Qin
- Department of Biochemistry, School of Medicine, Guangdong Provincial Key Laboratory of Cell Microenvironment and Disease Research, Shenzhen Key Laboratory of Cell Microenvironment, Southern University of Science and Technology, Shenzhen, China
| | - Xuekun Fu
- Department of Biochemistry, School of Medicine, Guangdong Provincial Key Laboratory of Cell Microenvironment and Disease Research, Shenzhen Key Laboratory of Cell Microenvironment, Southern University of Science and Technology, Shenzhen, China
| | - Jing Ma
- Department of Biomedical Engineering, Southern University of Science and Technology, Shenzhen, China
| | - Manxia Lin
- Department of Biochemistry, School of Medicine, Guangdong Provincial Key Laboratory of Cell Microenvironment and Disease Research, Shenzhen Key Laboratory of Cell Microenvironment, Southern University of Science and Technology, Shenzhen, China
| | - Peijun Zhang
- Department of Biochemistry, School of Medicine, Guangdong Provincial Key Laboratory of Cell Microenvironment and Disease Research, Shenzhen Key Laboratory of Cell Microenvironment, Southern University of Science and Technology, Shenzhen, China
| | - Yishu Wang
- Department of Biochemistry, School of Medicine, Guangdong Provincial Key Laboratory of Cell Microenvironment and Disease Research, Shenzhen Key Laboratory of Cell Microenvironment, Southern University of Science and Technology, Shenzhen, China
| | - Qinnan Yan
- Department of Biochemistry, School of Medicine, Guangdong Provincial Key Laboratory of Cell Microenvironment and Disease Research, Shenzhen Key Laboratory of Cell Microenvironment, Southern University of Science and Technology, Shenzhen, China
| | - Chu Tao
- Department of Biochemistry, School of Medicine, Guangdong Provincial Key Laboratory of Cell Microenvironment and Disease Research, Shenzhen Key Laboratory of Cell Microenvironment, Southern University of Science and Technology, Shenzhen, China
| | - Wen Liu
- Department of Biochemistry, School of Medicine, Guangdong Provincial Key Laboratory of Cell Microenvironment and Disease Research, Shenzhen Key Laboratory of Cell Microenvironment, Southern University of Science and Technology, Shenzhen, China
| | - Bin Tang
- Department of Biomedical Engineering, Southern University of Science and Technology, Shenzhen, China
| | - Di Chen
- Research Center for Human Tissues and Organs Degeneration, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
| | - Xiaochun Bai
- Department of Cell Biology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, China
| | - Huiling Cao
- Department of Biochemistry, School of Medicine, Guangdong Provincial Key Laboratory of Cell Microenvironment and Disease Research, Shenzhen Key Laboratory of Cell Microenvironment, Southern University of Science and Technology, Shenzhen, China.
| | - Guozhi Xiao
- Department of Biochemistry, School of Medicine, Guangdong Provincial Key Laboratory of Cell Microenvironment and Disease Research, Shenzhen Key Laboratory of Cell Microenvironment, Southern University of Science and Technology, Shenzhen, China.
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30
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Bouti P, Webbers SDS, Fagerholm SC, Alon R, Moser M, Matlung HL, Kuijpers TW. β2 Integrin Signaling Cascade in Neutrophils: More Than a Single Function. Front Immunol 2021; 11:619925. [PMID: 33679708 PMCID: PMC7930317 DOI: 10.3389/fimmu.2020.619925] [Citation(s) in RCA: 41] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2020] [Accepted: 12/31/2020] [Indexed: 12/13/2022] Open
Abstract
Neutrophils are the most prevalent leukocytes in the human body. They have a pivotal role in the innate immune response against invading bacterial and fungal pathogens, while recent emerging evidence also demonstrates their role in cancer progression and anti-tumor responses. The efficient execution of many neutrophil effector responses requires the presence of β2 integrins, in particular CD11a/CD18 or CD11b/CD18 heterodimers. Although extensively studied at the molecular level, the exact signaling cascades downstream of β2 integrins still remain to be fully elucidated. In this review, we focus mainly on inside-out and outside-in signaling of these two β2 integrin members expressed on neutrophils and describe differences between various neutrophil stimuli with respect to integrin activation, integrin ligand binding, and the pertinent differences between mouse and human studies. Last, we discuss how integrin signaling studies could be used to explore the therapeutic potential of targeting β2 integrins and the intracellular signaling cascade in neutrophils in several, among other, inflammatory conditions in which neutrophil activity should be dampened to mitigate disease.
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Affiliation(s)
- Panagiota Bouti
- Sanquin Research and Landsteiner Laboratory, Department of Blood Cell Research, Amsterdam University Medical Center, University of Amsterdam, Amsterdam, Netherlands
| | - Steven D S Webbers
- Sanquin Research and Landsteiner Laboratory, Department of Blood Cell Research, Amsterdam University Medical Center, University of Amsterdam, Amsterdam, Netherlands.,Department of Pediatric Immunology, Rheumatology and Infectious Disease, Amsterdam University Medical Center (AUMC), Emma Children's Hospital, University of Amsterdam, Amsterdam, Netherlands
| | - Susanna C Fagerholm
- Research Program of Molecular and Integrative Biosciences, Faculty of Biological and Environmental Sciences, University of Helsinki, Helsinki, Finland
| | - Ronen Alon
- Department of Immunology, The Weizmann Institute of Science, Rehovot, Israel
| | - Markus Moser
- Institute of Experimental Hematology, School of Medicine, Technical University of Munich, Munich, Germany
| | - Hanke L Matlung
- Sanquin Research and Landsteiner Laboratory, Department of Blood Cell Research, Amsterdam University Medical Center, University of Amsterdam, Amsterdam, Netherlands
| | - Taco W Kuijpers
- Sanquin Research and Landsteiner Laboratory, Department of Blood Cell Research, Amsterdam University Medical Center, University of Amsterdam, Amsterdam, Netherlands.,Department of Pediatric Immunology, Rheumatology and Infectious Disease, Amsterdam University Medical Center (AUMC), Emma Children's Hospital, University of Amsterdam, Amsterdam, Netherlands
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31
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Yang H, Lin L, Sun K, Zhang T, Chen W, Li L, Xie Y, Wu C, Wei Z, Yu C. Complex structures of Rsu1 and PINCH1 reveal a regulatory mechanism of the ILK/PINCH/Parvin complex for F-actin dynamics. eLife 2021; 10:64395. [PMID: 33587032 PMCID: PMC7909951 DOI: 10.7554/elife.64395] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Accepted: 02/12/2021] [Indexed: 12/20/2022] Open
Abstract
Communications between actin filaments and integrin-mediated focal adhesion (FA) are crucial for cell adhesion and migration. As a core platform to organize FA proteins, the tripartite ILK/PINCH/Parvin (IPP) complex interacts with actin filaments to regulate the cytoskeleton-FA crosstalk. Rsu1, a Ras suppressor, is enriched in FA through PINCH1 and plays important roles in regulating F-actin structures. Here, we solved crystal structures of the Rsu1/PINCH1 complex, in which the leucine-rich-repeats of Rsu1 form a solenoid structure to tightly associate with the C-terminal region of PINCH1. Further structural analysis uncovered that the interaction between Rsu1 and PINCH1 blocks the IPP-mediated F-actin bundling by disrupting the binding of PINCH1 to actin. Consistently, overexpressing Rsu1 in HeLa cells impairs stress fiber formation and cell spreading. Together, our findings demonstrated that Rsu1 is critical for tuning the communication between F-actin and FA by interacting with the IPP complex and negatively modulating the F-actin bundling.
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Affiliation(s)
- Haibin Yang
- Department of Biology, Southern University of Science and Technology, Shenzhen, China.,Faculty of Health Sciences, University of Macau, Macau, China
| | - Leishu Lin
- Department of Biology, Southern University of Science and Technology, Shenzhen, China
| | - Kang Sun
- Department of Biology, Southern University of Science and Technology, Shenzhen, China
| | - Ting Zhang
- Department of Biology, Southern University of Science and Technology, Shenzhen, China.,Academy for Advanced Interdisciplinary Studies, Southern University of Science and Technology, Shenzhen, China
| | - Wan Chen
- Department of Biology, Southern University of Science and Technology, Shenzhen, China
| | - Lianghui Li
- Department of Biology, Southern University of Science and Technology, Shenzhen, China
| | - Yuchen Xie
- Department of Biology, Southern University of Science and Technology, Shenzhen, China
| | - Chuanyue Wu
- Department of Pathology, School of Medicine and University of Pittsburgh Cancer Institute, University of Pittsburgh, Pittsburgh, United States
| | - Zhiyi Wei
- Department of Biology, Southern University of Science and Technology, Shenzhen, China
| | - Cong Yu
- Department of Biology, Southern University of Science and Technology, Shenzhen, China.,Guangdong Provincial Key Laboratory of Cell Microenvironment and Disease Research, and Shenzhen Key Laboratory of Cell Microenvironment, Shenzhen, China
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32
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Pulous FE, Carnevale JC, Al-Yafeai Z, Pearson BH, Hamilton JAG, Henry CJ, Orr AW, Petrich BG. Talin-dependent integrin activation is required for endothelial proliferation and postnatal angiogenesis. Angiogenesis 2021; 24:177-190. [PMID: 33113074 PMCID: PMC8441968 DOI: 10.1007/s10456-020-09756-4] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2020] [Accepted: 10/20/2020] [Indexed: 12/11/2022]
Abstract
Integrin activation contributes to key blood cell functions including adhesion, proliferation and migration. An essential step in the cell signaling pathway that activates integrin requires the binding of talin to the β-integrin cytoplasmic tail. Whereas this pathway is understood in platelets in detail, considerably less is known regarding how integrin-mediated adhesion in endothelium contributes to postnatal angiogenesis. We utilized an inducible EC-specific talin1 knock-out mouse (Tln1 EC-KO) and talin1 L325R knock-in mutant (Tln1 L325R) mouse, in which talin selectively lacks the capacity to activate integrins, to assess the role of integrin activation during angiogenesis. Deletion of talin1 during postnatal days 1-3 (P1-P3) caused lethality by P8 with extensive defects in retinal angiogenesis and widespread hemorrhaging. Tln1 EC-KO mice displayed reduced retinal vascular area, impaired EC sprouting and proliferation relative to Tln1 CTRLs. In contrast, induction of talin1 L325R in neonatal mice resulted in modest defects in retinal angiogenesis and mice survived to adulthood. Interestingly, deletion of talin1 or expression of talin1 L325R in ECs increased MAPK/ERK signaling. Strikingly, B16-F0 tumors grown in Tln1 L325R adult mice were 55% smaller and significantly less vascularized than tumors grown in littermate controls. EC talin1 is indispensable for postnatal development angiogenesis. The role of EC integrin activation appears context-dependent as its inhibition is compatible with postnatal development with mild defects in retinal angiogenesis but results in marked defects in tumor growth and angiogenesis. Inhibiting EC pan-integrin activation may be an effective approach to selectively target tumor blood vessel growth.
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Affiliation(s)
- Fadi E Pulous
- Department of Pediatrics, Aflac Cancer and Blood Disorders Center, Emory University School of Medicine, Atlanta, GA, USA
| | - Jamie C Carnevale
- Department of Pediatrics, Aflac Cancer and Blood Disorders Center, Emory University School of Medicine, Atlanta, GA, USA
| | - Zaki Al-Yafeai
- Department of Molecular and Cellular Physiology, LSU Health Sciences Center, Shreveport, LA, USA
| | - Brenna H Pearson
- Department of Molecular and Cellular Physiology, LSU Health Sciences Center, Shreveport, LA, USA
| | - Jamie A G Hamilton
- Department of Pediatrics, Aflac Cancer and Blood Disorders Center, Emory University School of Medicine, Atlanta, GA, USA
| | - Curtis J Henry
- Department of Pediatrics, Aflac Cancer and Blood Disorders Center, Emory University School of Medicine, Atlanta, GA, USA
| | - A Wayne Orr
- Department of Molecular and Cellular Physiology, LSU Health Sciences Center, Shreveport, LA, USA
- Department of Cell Biology and Anatomy, LSU Health Sciences Center, Shreveport, LA, USA
- Pathology and Translational Pathobiology, LSU Health Sciences Center, Shreveport, LA, USA
| | - Brian G Petrich
- Department of Pediatrics, Aflac Cancer and Blood Disorders Center, Emory University School of Medicine, Atlanta, GA, USA.
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33
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Liu J, Liu Z, Chen K, Chen W, Fang X, Li M, Zhou X, Ding N, Lei H, Guo C, Qian T, Wang Y, Liu L, Chen Y, Zhao H, Sun Y, Deng Y, Wu C. Kindlin-2 promotes rear focal adhesion disassembly and directional persistence during cell migration. J Cell Sci 2021; 134:jcs244616. [PMID: 33277381 DOI: 10.1242/jcs.244616] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2020] [Accepted: 11/22/2020] [Indexed: 01/13/2023] Open
Abstract
Cell migration involves front-to-rear asymmetric focal adhesion (FA) dynamics, which facilitates trailing edge detachment and directional persistence. Here, we show that kindlin-2 is crucial for FA sliding and disassembly in migrating cells. Loss of kindlin-2 markedly reduced FA number and selectively impaired rear FA sliding and disassembly, resulting in defective rear retraction and reduced directional persistence during cell migration. Kindlin-2-deficient cells failed to develop serum-induced actomyosin-dependent tension at FAs. At the molecular level, kindlin-2 directly interacted with myosin light chain kinase (MYLK, hereafter referred to as MLCK), which was enhanced in response to serum stimulation. Serum deprivation inhibited rear FA disassembly, which was released in response to serum stimulation. Overexpression of the MLCK-binding kindlin-2 F0F1 fragment (amino acid residues 1-167), which inhibits the interaction of endogenous kindlin-2 with MLCK, phenocopied kindlin-2 deficiency-induced migration defects. Inhibition of MLCK, like loss of kindlin-2, also impaired trailing-edge detachment, rear FA disassembly and directional persistence. These results suggest a role of kindlin-2 in promoting actomyosin contractility at FAs, leading to increased rear FA sliding and disassembly, and directional persistence during cell migration.
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Affiliation(s)
- Jie Liu
- Department of Biology, Guangdong Provincial Key Laboratory of Cell Microenvironment and Disease Research, and Shenzhen Key Laboratory of Cell Microenvironment, Southern University of Science and Technology, Shenzhen 518055, China
| | - Zhongzhen Liu
- Department of Biology, Guangdong Provincial Key Laboratory of Cell Microenvironment and Disease Research, and Shenzhen Key Laboratory of Cell Microenvironment, Southern University of Science and Technology, Shenzhen 518055, China
| | - Keng Chen
- Department of Biology, Guangdong Provincial Key Laboratory of Cell Microenvironment and Disease Research, and Shenzhen Key Laboratory of Cell Microenvironment, Southern University of Science and Technology, Shenzhen 518055, China
| | - Wei Chen
- Department of Biology, Guangdong Provincial Key Laboratory of Cell Microenvironment and Disease Research, and Shenzhen Key Laboratory of Cell Microenvironment, Southern University of Science and Technology, Shenzhen 518055, China
| | - Xiyuan Fang
- Department of Biology, Guangdong Provincial Key Laboratory of Cell Microenvironment and Disease Research, and Shenzhen Key Laboratory of Cell Microenvironment, Southern University of Science and Technology, Shenzhen 518055, China
| | - Meng Li
- Department of Biology, Guangdong Provincial Key Laboratory of Cell Microenvironment and Disease Research, and Shenzhen Key Laboratory of Cell Microenvironment, Southern University of Science and Technology, Shenzhen 518055, China
| | - Xuening Zhou
- Department of Biology, Guangdong Provincial Key Laboratory of Cell Microenvironment and Disease Research, and Shenzhen Key Laboratory of Cell Microenvironment, Southern University of Science and Technology, Shenzhen 518055, China
| | - Ning Ding
- Department of Biology, Guangdong Provincial Key Laboratory of Cell Microenvironment and Disease Research, and Shenzhen Key Laboratory of Cell Microenvironment, Southern University of Science and Technology, Shenzhen 518055, China
| | - Huan Lei
- Department of Biology, Guangdong Provincial Key Laboratory of Cell Microenvironment and Disease Research, and Shenzhen Key Laboratory of Cell Microenvironment, Southern University of Science and Technology, Shenzhen 518055, China
| | - Chen Guo
- Department of Biology, Guangdong Provincial Key Laboratory of Cell Microenvironment and Disease Research, and Shenzhen Key Laboratory of Cell Microenvironment, Southern University of Science and Technology, Shenzhen 518055, China
| | - Tao Qian
- Department of Biology, Guangdong Provincial Key Laboratory of Cell Microenvironment and Disease Research, and Shenzhen Key Laboratory of Cell Microenvironment, Southern University of Science and Technology, Shenzhen 518055, China
| | - Yilin Wang
- Core Research Facilities, Southern University of Science and Technology, Shenzhen 518055, China
| | - Lin Liu
- Department of Cell Biology and Genetics, College of Life Sciences, Nan Kai University, Tianjin, 300071, China
| | - Yonglong Chen
- Department of Biology, Guangdong Provincial Key Laboratory of Cell Microenvironment and Disease Research, and Shenzhen Key Laboratory of Cell Microenvironment, Southern University of Science and Technology, Shenzhen 518055, China
| | - Hui Zhao
- School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong
| | - Ying Sun
- Department of Biology, Guangdong Provincial Key Laboratory of Cell Microenvironment and Disease Research, and Shenzhen Key Laboratory of Cell Microenvironment, Southern University of Science and Technology, Shenzhen 518055, China
| | - Yi Deng
- Department of Biology, Guangdong Provincial Key Laboratory of Cell Microenvironment and Disease Research, and Shenzhen Key Laboratory of Cell Microenvironment, Southern University of Science and Technology, Shenzhen 518055, China
| | - Chuanyue Wu
- Department of Pathology, University of Pittsburgh School of Medicine, Pittsburgh, PA 15261, USA
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34
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Plow EF, Pluskota E, Bialkowska K. Kindlins as modulators of breast cancer progression. JOURNAL OF BREAST CANCER RESEARCH 2021; 1:20-29. [PMID: 35936112 PMCID: PMC9352049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Kindlin-1 (K1, FERMT1), Kindlin-2 (K2, FERMT2), and Kindlin-3 (K3, FERMT3) are the three members of the kindlin family of adapter proteins found in mammals. One or more kindlins are found in most cell types, K1 primarily in epithelial cells, K3 in primarily hematopoietic cells and also endothelial cells, and K2 is very broadly distributed. The kindlins consist primarily of a 4.1-erzin-radixin-moiesin (FERM) domain, which is transected by a lipid-binding plextrin-homology (PH) domain. Deficiencies of each kindlin in mice and/ or humans have profound pathogenic consequences. The most well-established function of kindlins depends on their ability to participate in the activat integrin adhesion receptors. This function depends on the binding of each kindlin to the beta subunit of integrins where it cooperates with talin to enhance avidity of interactions with cognate extracellular matrix ligands. Deficiencies of many different integrins are lethal, are critical for normal development of mammary tissue, and excessive expression and/or activation of certain integrins are associated with progression and metastasis of breast cancer. However, via its interaction with many other intracellular proteins, kindlins can influence numerous cellular responses. Changes in expression of each of the three kindlins have been reported in association with breast cancer, with several studies indicating that kindlins are among the most upregulated genes in breast cancer. The association of abnormal functions of K2 with breast cancer is particularly extensive with many reports indicating that it is a major driver of breast cancer via its promotion of cancer cell proliferation, survival, adhesion, migration, invasion, the epithelial-to-mesenchymal transition and its influence on macrophage recruitment and phenotype. These associations suggest that the kindlins and their functions represent an intriguing therapeutic target for exploration of breast cancer therapy.
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35
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Godbout E, Son DO, Hume S, Boo S, Sarrazy V, Clément S, Kapus A, Wehrle-Haller B, Bruckner-Tuderman L, Has C, Hinz B. Kindlin-2 Mediates Mechanical Activation of Cardiac Myofibroblasts. Cells 2020; 9:cells9122702. [PMID: 33348602 PMCID: PMC7766948 DOI: 10.3390/cells9122702] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2020] [Revised: 12/11/2020] [Accepted: 12/14/2020] [Indexed: 02/07/2023] Open
Abstract
We identify the focal adhesion protein kindlin-2 as player in a novel mechanotransduction pathway that controls profibrotic cardiac fibroblast to myofibroblast activation. Kindlin-2 is co-upregulated with the myofibroblast marker α-smooth muscle actin (α-SMA) in fibrotic rat hearts and in human cardiac fibroblasts exposed to fibrosis-stiff culture substrates and pro-fibrotic TGF-β1. Stressing fibroblasts using ferromagnetic microbeads, stretchable silicone membranes, and cell contraction agonists all result in kindlin-2 translocation to the nucleus. Overexpression of full-length kindlin-2 but not of kindlin-2 missing a putative nuclear localization sequence (∆NLS kindlin-2) results in increased α-SMA promoter activity. Downregulating kindlin-2 with siRNA leads to decreased myofibroblast contraction and reduced α-SMA expression, which is dependent on CC(A/T)-rich GG(CArG) box elements in the α-SMA promoter. Lost myofibroblast features under kindlin-2 knockdown are rescued with wild-type but not ∆NLS kindlin-2, indicating that myofibroblast control by kindlin-2 requires its nuclear translocation. Because kindlin-2 can act as a mechanotransducer regulating the transcription of α-SMA, it is a potential target to interfere with myofibroblast activation in tissue fibrosis.
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Affiliation(s)
- Elena Godbout
- Laboratory of Tissue Repair and Regeneration, Faculty of Dentistry, University of Toronto, Toronto, ON M5G 1G6, Canada; (E.G.); (D.O.S.); (S.H.); (S.B.); (V.S.)
| | - Dong Ok Son
- Laboratory of Tissue Repair and Regeneration, Faculty of Dentistry, University of Toronto, Toronto, ON M5G 1G6, Canada; (E.G.); (D.O.S.); (S.H.); (S.B.); (V.S.)
| | - Stephanie Hume
- Laboratory of Tissue Repair and Regeneration, Faculty of Dentistry, University of Toronto, Toronto, ON M5G 1G6, Canada; (E.G.); (D.O.S.); (S.H.); (S.B.); (V.S.)
| | - Stellar Boo
- Laboratory of Tissue Repair and Regeneration, Faculty of Dentistry, University of Toronto, Toronto, ON M5G 1G6, Canada; (E.G.); (D.O.S.); (S.H.); (S.B.); (V.S.)
| | - Vincent Sarrazy
- Laboratory of Tissue Repair and Regeneration, Faculty of Dentistry, University of Toronto, Toronto, ON M5G 1G6, Canada; (E.G.); (D.O.S.); (S.H.); (S.B.); (V.S.)
| | - Sophie Clément
- Division of Clinical Pathology, University Hospital, University of Geneva School of Medicine, 1211 Geneva 4, Switzerland;
| | - Andras Kapus
- Keenan Centre for Biomedical Science, St. Michael’s Hospital, Toronto, ON M5B 1W8, Canada;
- Department of Surgery, University of Toronto, Toronto, ON M5T 1P5, Canada
| | - Bernhard Wehrle-Haller
- Department of Cell Physiology and Metabolism, Faculty of Medicine, Centre Médical Universitaire, University of Geneva, 1211 Geneva 4, Switzerland;
| | - Leena Bruckner-Tuderman
- Medical Center and Medical Faculty, University of Freiburg, 79104 Freiburg, Germany; (L.B.-T.); (C.H.)
| | - Cristina Has
- Medical Center and Medical Faculty, University of Freiburg, 79104 Freiburg, Germany; (L.B.-T.); (C.H.)
| | - Boris Hinz
- Laboratory of Tissue Repair and Regeneration, Faculty of Dentistry, University of Toronto, Toronto, ON M5G 1G6, Canada; (E.G.); (D.O.S.); (S.H.); (S.B.); (V.S.)
- Correspondence: ; Tel.: +1-416-978-8728
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36
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Chen D, Zhang C, Chen J, Yang M, Afzal TA, An W, Maguire EM, He S, Luo J, Wang X, Zhao Y, Wu Q, Xiao Q. miRNA-200c-3p promotes endothelial to mesenchymal transition and neointimal hyperplasia in artery bypass grafts. J Pathol 2020; 253:209-224. [PMID: 33125708 PMCID: PMC7839516 DOI: 10.1002/path.5574] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2020] [Revised: 09/17/2020] [Accepted: 10/22/2020] [Indexed: 12/11/2022]
Abstract
Increasing evidence has suggested a critical role for endothelial‐to‐mesenchymal transition (EndoMT) in a variety of pathological conditions. MicroRNA‐200c‐3p (miR‐200c‐3p) has been implicated in epithelial‐to‐mesenchymal transition. However, the functional role of miR‐200c‐3p in EndoMT and neointimal hyperplasia in artery bypass grafts remains largely unknown. Here we demonstrated a critical role for miR‐200c‐3p in EndoMT. Proteomics and luciferase activity assays revealed that fermitin family member 2 (FERM2) is the functional target of miR‐200c‐3p during EndoMT. FERMT2 gene inactivation recapitulates the effect of miR‐200c‐3p overexpression on EndoMT, and the inhibitory effect of miR‐200c‐3p inhibition on EndoMT was reversed by FERMT2 knockdown. Further mechanistic studies revealed that FERM2 suppresses smooth muscle gene expression by preventing serum response factor nuclear translocation and preventing endothelial mRNA decay by interacting with Y‐box binding protein 1. In a model of aortic grafting using endothelial lineage tracing, we observed that miR‐200c‐3p expression was dramatically up‐regulated, and that EndoMT contributed to neointimal hyperplasia in grafted arteries. MiR‐200c‐3p inhibition in grafted arteries significantly up‐regulated FERM2 gene expression, thereby preventing EndoMT and reducing neointimal formation. Importantly, we found a high level of EndoMT in human femoral arteries with atherosclerotic lesions, and that miR‐200c‐3p expression was significantly increased, while FERMT2 expression levels were dramatically decreased in diseased human arteries. Collectively, we have documented an unexpected role for miR‐200c‐3p in EndoMT and neointimal hyperplasia in grafted arteries. Our findings offer a novel therapeutic opportunity for treating vascular diseases by specifically targeting the miR‐200c‐3p/FERM2 regulatory axis. © 2020 The Authors. The Journal of Pathology published by John Wiley & Sons, Ltd. on behalf of The Pathological Society of Great Britain and Ireland.
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Affiliation(s)
- Dan Chen
- Department of Cardiothoracic Surgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing, PR China
| | - Cheng Zhang
- Department of Cardiothoracic Surgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing, PR China
| | - Jiangyong Chen
- Centre for Clinical Pharmacology, William Harvey Research Institute, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London, UK.,Department of Cardiothoracic Surgery, Yongchuan Hospital of Chongqing Medical University, Chongqing, PR China
| | - Mei Yang
- Centre for Clinical Pharmacology, William Harvey Research Institute, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London, UK
| | - Tayyab A Afzal
- Centre for Clinical Pharmacology, William Harvey Research Institute, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London, UK
| | - Weiwei An
- Centre for Clinical Pharmacology, William Harvey Research Institute, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London, UK
| | - Eithne M Maguire
- Centre for Clinical Pharmacology, William Harvey Research Institute, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London, UK
| | - Shiping He
- Centre for Clinical Pharmacology, William Harvey Research Institute, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London, UK
| | - Jun Luo
- Department of Cardiothoracic Surgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing, PR China.,Centre for Clinical Pharmacology, William Harvey Research Institute, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London, UK
| | - Xiaowen Wang
- Department of Cardiothoracic Surgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing, PR China
| | - Yu Zhao
- Vascular Surgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing, PR China
| | - Qingchen Wu
- Department of Cardiothoracic Surgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing, PR China
| | - Qingzhong Xiao
- Centre for Clinical Pharmacology, William Harvey Research Institute, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London, UK.,Key Laboratory of Cardiovascular Diseases at The Second Affiliated Hospital, School of Basic Medical Sciences, Guangzhou Medical University, Guangzhou, PR China.,Guangzhou Municipal and Guangdong Provincial Key Laboratory of Protein Modification and Degradation, School of Basic Medical Sciences, Guangzhou Medical University, Guangzhou, PR China
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37
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Kindlin-2 Inhibits the Hippo Signaling Pathway by Promoting Degradation of MOB1. Cell Rep 2020; 29:3664-3677.e5. [PMID: 31825843 DOI: 10.1016/j.celrep.2019.11.035] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2019] [Revised: 09/27/2019] [Accepted: 11/07/2019] [Indexed: 01/03/2023] Open
Abstract
The Hippo signaling pathway plays a key role in development and cancer progression. However, molecules that intrinsically inhibit this pathway are less well known. Here, we report that the focal adhesion molecule Kindlin-2 inhibits Hippo signaling by interacting with and degrading MOB1 and promoting the interaction between MOB1 and the E3 ligase praja2. Kindlin-2 thus inhibits the phosphorylation of LATS1 and YAP and promotes YAP translocation into the nucleus, where it activates downstream Hippo target gene transcription. Kindlin-2 depletion activates Hippo/YAP signaling and alleviates renal fibrosis in Kindlin-2 knockout mice with unilateral ureteral occlusion (UUO). Moreover, Kindlin-2 levels are negatively correlated with MOB1 and phosphorylated (p) YAP in samples from patients with renal fibrosis. Altogether, these results demonstrate that Kindlin-2 inhibits Hippo signaling through degradation of MOB1. A specific long-lasting siRNA against Kindlin-2 effectively alleviated UUO-induced renal fibrosis and could be a potential therapy for renal fibrosis.
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38
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Zhang Y, Lin Z, Fang Y, Wu J. Prediction of Catch-Slip Bond Transition of Kindlin2/β3 Integrin via Steered Molecular Dynamics Simulation. J Chem Inf Model 2020; 60:5132-5141. [PMID: 32877187 DOI: 10.1021/acs.jcim.0c00837] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Kindlin2 is believed to be crucial in integrin activation, which mediates the cell-extracellular matrix adhesion and signaling, but the mechanoregulation of the interaction between Kindlin2 and integrin remains unclear. Here, we performed the so-called "ramp-clamp" steered molecular dynamics simulation on the crystal structure of Kindlin2 bound with β3 integrin. The results showed that the complex had a better mechanical strength for its rupture force of about 200 pN under pulling with the velocity of 1 Å/ns, and was mechanostable for its conformational conservation under constant tensile force (≤60 pN). The catch-slip bond transition with a force threshold of 20 pN was demonstrated by the dissociation probability, the interaction energy, the interface H-bond number, and the force-induced allostery of the complex. This study might provide a novel insight into force-dependent Kindlin2/integrin-related signaling and its structural basis in cellular processes as well as a rational SMD-based computer strategy for predicting the structure-function relationship of the stretched complex.
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Affiliation(s)
- Yan Zhang
- Institute of Biomechanics, School of Bioscience and Bioengineering, South China University of Technology, Guangzhou 510006, China
| | - Zhanyi Lin
- Department of Cardiology, Institute of Geriatric Medicine, Guangdong Academy of Medical Sciences, Guangdong General Hospital, Guangzhou 510080, China
| | - Ying Fang
- Institute of Biomechanics, School of Bioscience and Bioengineering, South China University of Technology, Guangzhou 510006, China
| | - Jianhua Wu
- Institute of Biomechanics, School of Bioscience and Bioengineering, South China University of Technology, Guangzhou 510006, China
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39
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Actin polymerization downstream of integrins: signaling pathways and mechanotransduction. Biochem J 2020; 477:1-21. [PMID: 31913455 DOI: 10.1042/bcj20170719] [Citation(s) in RCA: 45] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2019] [Revised: 11/17/2019] [Accepted: 12/16/2019] [Indexed: 01/04/2023]
Abstract
A cell constantly adapts to its environment. Cell decisions to survive, to proliferate or to migrate are dictated not only by soluble growth factors, but also through the direct interaction of the cell with the surrounding extracellular matrix (ECM). Integrins and their connections to the actin cytoskeleton are crucial for monitoring cell attachment and the physical properties of the substratum. Cell adhesion dynamics are modulated in complex ways by the polymerization of branched and linear actin arrays, which in turn reinforce ECM-cytoskeleton connection. This review describes the major actin regulators, Ena/VASP proteins, formins and Arp2/3 complexes, in the context of signaling pathways downstream of integrins. We focus on the specific signaling pathways that transduce the rigidity of the substrate and which control durotaxis, i.e. directed migration of cells towards increased ECM rigidity. By doing so, we highlight several recent findings on mechanotransduction and put them into a broad integrative perspective that is the result of decades of intense research on the actin cytoskeleton and its regulation.
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Bu W, Levitskaya Z, Loh ZY, Jin S, Basu S, Ero R, Yan X, Wang M, Ngan SFC, Sze SK, Tan SM, Gao YG. Structural basis of human full-length kindlin-3 homotrimer in an auto-inhibited state. PLoS Biol 2020; 18:e3000755. [PMID: 32644996 PMCID: PMC7373317 DOI: 10.1371/journal.pbio.3000755] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2019] [Revised: 07/21/2020] [Accepted: 06/22/2020] [Indexed: 01/07/2023] Open
Abstract
Kindlin-1, -2, and -3 directly bind integrin β cytoplasmic tails to regulate integrin activation and signaling. Despite their functional significance and links to several diseases, structural information on full-length kindlin proteins remains unknown. Here, we report the crystal structure of human full-length kindlin-3, which reveals a novel homotrimer state. Unlike kindlin-3 monomer, which is the major population in insect and mammalian cell expression systems, kindlin-3 trimer does not bind integrin β cytoplasmic tail as the integrin-binding pocket in the F3 subdomain of 1 protomer is occluded by the pleckstrin homology (PH) domain of another protomer, suggesting that kindlin-3 is auto-inhibited upon trimer formation. This is also supported by functional assays in which kindlin-3 knockout K562 erythroleukemia cells reconstituted with the mutant kindlin-3 containing trimer-disrupting mutations exhibited an increase in integrin-mediated adhesion and spreading on fibronectin compared with those reconstituted with wild-type kindlin-3. Taken together, our findings reveal a novel mechanism of kindlin auto-inhibition that involves its homotrimer formation. The crystal structure of a human full-length kindlin protein (kindlin-3) reveals a homotrimeric complex; together with in vitro and in vivo data, this suggests an auto-inhibition model for kindlins in integrin activation.
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Affiliation(s)
- Wenting Bu
- School of Biological Sciences, Nanyang Technological University, Singapore, Singapore
| | - Zarina Levitskaya
- School of Biological Sciences, Nanyang Technological University, Singapore, Singapore
| | - Zhi Yang Loh
- School of Biological Sciences, Nanyang Technological University, Singapore, Singapore
| | - Shengyang Jin
- School of Biological Sciences, Nanyang Technological University, Singapore, Singapore
- NTU Institute of Structural Biology, Nanyang Technological University, Singapore, Singapore
| | - Shibom Basu
- Swiss Light Source, Paul Scherrer Institute, Villigen, Switzerland
| | - Rya Ero
- School of Biological Sciences, Nanyang Technological University, Singapore, Singapore
| | - Xinfu Yan
- School of Biological Sciences, Nanyang Technological University, Singapore, Singapore
| | - Meitian Wang
- Swiss Light Source, Paul Scherrer Institute, Villigen, Switzerland
| | - So Fong Cam Ngan
- School of Biological Sciences, Nanyang Technological University, Singapore, Singapore
| | - Siu Kwan Sze
- School of Biological Sciences, Nanyang Technological University, Singapore, Singapore
| | - Suet-Mien Tan
- School of Biological Sciences, Nanyang Technological University, Singapore, Singapore
- * E-mail: (YGG); (SMT)
| | - Yong-Gui Gao
- School of Biological Sciences, Nanyang Technological University, Singapore, Singapore
- NTU Institute of Structural Biology, Nanyang Technological University, Singapore, Singapore
- Institute of Molecular and Cell Biology, Agency for Science, Technology and Research, Singapore, Singapore
- * E-mail: (YGG); (SMT)
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41
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Kadry YA, Maisuria EM, Huet-Calderwood C, Calderwood DA. Differences in self-association between kindlin-2 and kindlin-3 are associated with differential integrin binding. J Biol Chem 2020; 295:11161-11173. [PMID: 32546480 DOI: 10.1074/jbc.ra120.013618] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2020] [Revised: 06/03/2020] [Indexed: 12/15/2022] Open
Abstract
The integrin family of transmembrane adhesion receptors coordinates complex signaling networks that control the ability of cells to sense and communicate with the extracellular environment. Kindlin proteins are a central cytoplasmic component of these networks, directly binding integrin cytoplasmic domains and mediating interactions with cytoskeletal and signaling proteins. The physiological importance of kindlins is well established, but how the scaffolding functions of kindlins are regulated at the molecular level is still unclear. Here, using a combination of GFP nanotrap association assays, pulldown and integrin-binding assays, and live-cell imaging, we demonstrate that full-length kindlins can oligomerize (self-associate) in mammalian cells, and we propose that this self-association inhibits integrin binding and kindlin localization to focal adhesions. We show that both kindlin-2 and kindlin-3 can self-associate and that kindlin-3 self-association is more robust. Using chimeric mapping, we demonstrate that the F2PH and F3 subdomains are important for kindlin self-association. Through comparative sequence analysis of kindlin-2 and kindlin-3, we identify kindlin-3 point mutations that decrease self-association and enhance integrin binding, affording mutant kindlin-3 the ability to localize to focal adhesions. Our results support the notion that kindlin self-association negatively regulates integrin binding.
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Affiliation(s)
- Yasmin A Kadry
- Department of Pharmacology, Yale University, New Haven, Connecticut, USA
| | - Eesha M Maisuria
- Department of Molecular Biophysics and Biochemistry, Yale College, Yale University, New Haven, Connecticut, USA
| | | | - David A Calderwood
- Department of Pharmacology, Yale University, New Haven, Connecticut, USA .,Department of Cell Biology, Yale University, New Haven, Connecticut, USA
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Rohena C, Kalogriopoulos N, Rajapakse N, Roy S, Lopez-Sanchez I, Ablack J, Sahoo D, Ghosh P. GIV•Kindlin Interaction Is Required for Kindlin-Mediated Integrin Recognition and Activation. iScience 2020; 23:101209. [PMID: 32535026 PMCID: PMC7300163 DOI: 10.1016/j.isci.2020.101209] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2020] [Revised: 04/15/2020] [Accepted: 05/24/2020] [Indexed: 11/16/2022] Open
Abstract
Cells perceive and respond to the extracellular matrix via integrin receptors; their dysregulation has been implicated in inflammation and cancer metastasis. Here we show that a guanine nucleotide-exchange modulator of trimeric-GTPase Gαi, GIV (a.k.a Girdin), directly binds the integrin adaptor Kindlin-2. A non-canonical short linear motif within the C terminus of GIV binds Kindlin-2-FERM3 domain at a site that is distinct from the binding site for the canonical NPxY motif on the -integrin tail. Binding of GIV to Kindlin-2 allosterically enhances Kindlin-2's affinity for β1-integrin. Consequently, integrin activation and clustering are maximized, which augments cell adhesion, spreading, and invasion. Findings elucidate how the GIV•Kindlin-2 complex has a 2-fold impact: it allosterically synergizes integrin activation and enables β1-integrins to indirectly access and modulate trimeric GTPases via the complex. Furthermore, Cox proportional-hazard models on tumor transcriptomics provide trans-scale evidence of synergistic interactions between GIV•Kindlin-2•β1-integrin on time to progression to metastasis. GIV and Kindlin (K2), two integrin adaptors that promote metastasis, bind each other Binding of GIV or integrin to K2 allosterically enhances GIV•K2•integrin complexes Binding is required for the maximal recruitment of GIV and K2 to active integrins Binding facilitates integrin clustering, activation, tumor cell adhesion, invasion
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Affiliation(s)
- Cristina Rohena
- Department of Medicine, University of California San Diego, 9500 Gilman Drive (MC 0651), George E. Palade Bldg, Rm 239, La Jolla, CA 92093, USA
| | - Nicholas Kalogriopoulos
- Department of Medicine, University of California San Diego, 9500 Gilman Drive (MC 0651), George E. Palade Bldg, Rm 239, La Jolla, CA 92093, USA; Department of Cellular and Molecular Medicine, University of California San Diego, CA 92093, USA
| | - Navin Rajapakse
- Department of Cellular and Molecular Medicine, University of California San Diego, CA 92093, USA
| | - Suchismita Roy
- Department of Cellular and Molecular Medicine, University of California San Diego, CA 92093, USA
| | - Inmaculada Lopez-Sanchez
- Department of Medicine, University of California San Diego, 9500 Gilman Drive (MC 0651), George E. Palade Bldg, Rm 239, La Jolla, CA 92093, USA
| | - Jailal Ablack
- Department of Medicine, University of California San Diego, 9500 Gilman Drive (MC 0651), George E. Palade Bldg, Rm 239, La Jolla, CA 92093, USA
| | - Debashis Sahoo
- Department of Pediatrics, University of California San Diego, CA 92093, USA; Department of Computer Science and Engineering, Jacob's School of Engineering, University of California San Diego, CA 92093, USA; Rebecca and John Moore Comprehensive Cancer Center, University of California San Diego, CA 92093, USA
| | - Pradipta Ghosh
- Department of Medicine, University of California San Diego, 9500 Gilman Drive (MC 0651), George E. Palade Bldg, Rm 239, La Jolla, CA 92093, USA; Department of Cellular and Molecular Medicine, University of California San Diego, CA 92093, USA; Rebecca and John Moore Comprehensive Cancer Center, University of California San Diego, CA 92093, USA; Veterans Affairs Medical Center, 3350 La Jolla Village Drive, San Diego, CA 92161, USA.
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43
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Xue X, Xue S, Wan W, Li J, Shi H. HIF-1α interacts with Kindlin-2 and influences breast cancer elasticity: A study based on shear wave elastography imaging. Cancer Med 2020; 9:4971-4979. [PMID: 32436609 PMCID: PMC7367621 DOI: 10.1002/cam4.3130] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2019] [Revised: 04/20/2020] [Accepted: 04/22/2020] [Indexed: 12/24/2022] Open
Abstract
Breast cancer was the most frequent and the second most deadly cancer in women in 2018 in China; thus, early diagnosis of breast cancer is important. Studies have reported that tissue stiffness promotes cancer progression through increased collagen or fibrosis. Shear wave elastography (SWE) is a technique for measuring tissue stiffness. However, the mechanisms underlying cancer tissue stiffness or fibrosis are not entirely clear. Hypoxia‐inducible factor 1 (HIF‐1α) is expressed in response to hypoxia and contributes to tumor progression and metastasis. Kindlin‐2 is an important co‐activator of integrin. We have reported that Kindlin‐2 influences breast cancer stiffness and metastasis. In this study, SWE was used to determine the maximum elasticity (Emax) of patients before operation or core needle biopsy. The specimens were used for staining. Knockdown, overexpression, co‐immunoprecipitation, and immunofluorescence assays were used to explore the relationship between HIF‐1α and Kindlin‐2. We found that HIF‐1α and Kindlin‐2 were highly expressed in invasive breast cancer and that the expression levels of HIF‐1α and Kindlin‐2 were correlated with Emax. HIF‐1α interacts with Kindlin‐2. Besides, HIF‐1α and Kindlin‐2 influence the expression of P4HA1, an important protein in collagen biogenesis through the integrin/FAK pathway. Our study first identified a new mechanism of invasive breast cancer stiffness by linking HIF‐1α and Kindlin‐2 to collagen biogenesis. Therefore, based on SWE, Emax could be a physical biomarker of invasive breast cancer for early, noninvasive diagnosis, and HIF‐1α and Kindlin‐2 could be pathological markers for early diagnosis and targeted therapy.
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Affiliation(s)
- Xiaowei Xue
- Department of Ultrasound, The Second Medical Center of Chinese PLA General Hospital, Beijing, China
| | - Shaowei Xue
- Department of Ultrasound, The First Medical Center of Chinese PLA General Hospital, Beijing, China
| | - Wenbo Wan
- Department of Ultrasound, The First Medical Center of Chinese PLA General Hospital, Beijing, China
| | - Junlai Li
- Department of Ultrasound, The Second Medical Center of Chinese PLA General Hospital, Beijing, China
| | - Huaiyin Shi
- Department of Pathology, The First Medical Center of Chinese PLA General Hospital, Beijing, China
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He X, Song J, Cai Z, Chi X, Wang Z, Yang D, Xie S, Zhou J, Fu Y, Li W, Kong W, Zhan J, Zhang H. Kindlin-2 deficiency induces fatal intestinal obstruction in mice. Am J Cancer Res 2020; 10:6182-6200. [PMID: 32483447 PMCID: PMC7255029 DOI: 10.7150/thno.46553] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Accepted: 04/22/2020] [Indexed: 02/06/2023] Open
Abstract
Rationale: Smooth muscle-motility disorders are mainly characterized by impaired contractility and functional intestinal obstruction. Some of these cases are caused by genetic mutations of smooth muscle genes ACTA2, ACTG2, MYH11, MYLK and LMOD1. Still the etiology is complex and multifactorial and the underlying pathology is poorly understood. Integrin interaction protein Kindlin-2 is widely expressed in striated and smooth muscle cells (SMC). However, the function of Kindlin-2 in the smooth muscle remains elusive. Methods: We generated two mouse models using different cre promoter transgenic mice, Kindlin-2fl/fl SM22α-cre+ (cKO mice) and Kindlin-2fl/fl; MYH-cre+ (iKO mice). Embryos and adult tissues were prepared for hematoxylin and eosin (H&E) staining, immunohistochemistry (IHC) and terminal deoxynucleotidyl transferase dUTP nick-end labeling (TUNEL) apoptosis assay. We investigated ultrastructure changes of mouse smooth muscle using transmission electron microscopy (TEM) and measured smooth muscle contractile force in mounting aortic and intestinal rings using the multiwire myograph system (DMT 620M). In addition, cell traction force microscopy (CTFM) was applied to observe the functional change of primary SMC after Kindlin-2 depletion by RNAi. Results: Depletion of Kindlin-2 encoding gene Fermt2 in embryonic smooth muscles leads to apoptosis, downregulates the key components of SMC, impairs smooth muscle development, and finally causes embryonic death at E14.5. Tamoxifen-induced Kindlin-2-specific knockout in adult mouse smooth muscle showed decreased blood pressure, intestinal hypoperistalsis, and eventually died of intestinal obstruction. Kindlin-2 depletion also leads to downregulated Myh11, α-SMA, and CNN, shortened myofilament, broken myofibrils, and impaired contractility of the smooth muscles in iKO mice. Mechanistically, loss of Kindlin-2 decreases Ca2+ influx in primary vascular smooth muscle cells (PVSMC) by downregulating the expression of calcium-binding protein S100A14 and STIM1. Conclusion: We demonstrated that Kindlin-2 is essential for maintaining the normal structure and function of smooth muscles. Loss of Kindlin-2 impairs smooth muscle formation during embryonic development by inducing apoptosis and jeopardizes the contraction of adult smooth muscle by blocking Ca2+ influx that leads to intestinal obstruction. Mice with Kindlin-2 depletion in adult smooth muscle could be a potent animal model of intestinal obstruction for disease research, drug treatment and prognosis.
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45
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Kadry YA, Calderwood DA. Chapter 22: Structural and signaling functions of integrins. BIOCHIMICA ET BIOPHYSICA ACTA. BIOMEMBRANES 2020; 1862:183206. [PMID: 31991120 PMCID: PMC7063833 DOI: 10.1016/j.bbamem.2020.183206] [Citation(s) in RCA: 91] [Impact Index Per Article: 22.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/16/2019] [Revised: 01/21/2020] [Accepted: 01/22/2020] [Indexed: 02/06/2023]
Abstract
The integrin family of transmembrane adhesion receptors is essential for sensing and adhering to the extracellular environment. Integrins are heterodimers composed of non-covalently associated α and β subunits that engage extracellular matrix proteins and couple to intracellular signaling and cytoskeletal complexes. Humans have 24 different integrin heterodimers with differing ligand binding specificities and non-redundant functions. Complex structural rearrangements control the ability of integrins to engage ligands and to activate diverse downstream signaling networks, modulating cell adhesion and dynamics, processes which are crucial for metazoan life and development. Here we review the structural and signaling functions of integrins focusing on recent advances which have enhanced our understanding of how integrins are activated and regulated, and the cytoplasmic signaling networks downstream of integrins.
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Affiliation(s)
- Yasmin A Kadry
- Department of Pharmacology, Yale University School of Medicine, New Haven, CT 06520, United States of America
| | - David A Calderwood
- Department of Pharmacology, Yale University School of Medicine, New Haven, CT 06520, United States of America; Department of Cell Biology, Yale University School of Medicine, New Haven, CT 06520, United States of America..
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46
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Liu H, Zhu L, Dudiki T, Gabanic B, Good L, Podrez EA, Cherepanova OA, Qin J, Byzova TV. Macrophage Migration and Phagocytosis Are Controlled by Kindlin-3's Link to the Cytoskeleton. THE JOURNAL OF IMMUNOLOGY 2020; 204:1954-1967. [PMID: 32094207 DOI: 10.4049/jimmunol.1901134] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2019] [Accepted: 01/15/2020] [Indexed: 01/08/2023]
Abstract
Major myeloid cell functions from adhesion to migration and phagocytosis are mediated by integrin adhesion complexes, also known as adhesome. The presence of a direct integrin binding partner Kindlin-3 is crucial for these functions, and its lack causes severe immunodeficiency in humans. However, how Kindlin-3 is incorporated into the adhesome and how its function is regulated is poorly understood. In this study, using nuclear magnetic resonance spectroscopy, we show that Kindlin-3 directly interacts with paxillin (PXN) and leupaxin (LPXN) via G43/L47 within its F0 domain. Surprisingly, disruption of Kindlin-3-PXN/LPXN interactions in Raw 264.7 macrophages promoted cell spreading and polarization, resulting in upregulation of both general cell motility and directed cell migration, which is in a drastic contrast to the consequences of Kindlin-3 knockout. Moreover, disruption of Kindlin-3-PXN/LPXN binding promoted the transition from mesenchymal to amoeboid mode of movement as well as augmented phagocytosis. Thus, these novel links between Kindlin-3 and key adhesome members PXN/LPXN limit myeloid cell motility and phagocytosis, thereby providing an important immune regulatory mechanism.
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Affiliation(s)
- Huan Liu
- Department of Neurosciences, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195
| | - Liang Zhu
- Department of Cardiovascular and Metabolic Sciences, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195; and
| | - Tejasvi Dudiki
- Department of Neurosciences, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195
| | - Benjamin Gabanic
- Department of Neurosciences, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195
| | - Logan Good
- Department of Neurosciences, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195
| | - Eugene A Podrez
- Department of Inflammation and Immunity, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195
| | - Olga A Cherepanova
- Department of Cardiovascular and Metabolic Sciences, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195; and
| | - Jun Qin
- Department of Cardiovascular and Metabolic Sciences, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195; and
| | - Tatiana V Byzova
- Department of Neurosciences, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195;
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Bialkowska K, Sossey-Alaoui K, Pluskota E, Izem L, Qin J, Plow EF. Site-specific phosphorylation regulates the functions of kindlin-3 in a variety of cells. Life Sci Alliance 2020; 3:3/3/e201900594. [PMID: 32024667 PMCID: PMC7010036 DOI: 10.26508/lsa.201900594] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2019] [Revised: 01/22/2020] [Accepted: 01/23/2020] [Indexed: 12/12/2022] Open
Abstract
Studies of isolated cells, mice, and humans have demonstrated the vital role of the FERM domain protein kindlin-3 in integrin activation in certain hematopoietic and non-hematopoietic cells, consequent to binding to integrin β-subunits. To explore regulatory mechanisms, we developed a monoclonal antibody that selectively recognizes the phosphorylated form of Ser484 (pS484) in kindlin-3. Activation of platelets, HEL megakaryocytic-like cells and BT549 breast cancer cells led to enhanced expression of pS484 as assessed by immunofluorescence or Western blotting. In platelets, pS484 rose rapidly and transiently upon stimulation. When a mutant form of kindlin-3, T482S484/AA kindlin-3, was transduced into mouse megakaryocytes, it failed to support activation of integrin αIIbβ3, whereas wild-type kindlin-3 did. In MDA-MB231 breast cancer cells, expression of T482S484/AA kindlin-3 suppressed cell spreading, migration, invasion, and VEGF production. Wild-type kindlin-3 expressing cells markedly increased tumor growth in vivo, whereas T482S484/AA kindlin-3 significantly blunted tumor progression. Thus, our data establish that a unique phosphorylation event in kindlin-3 regulates its cellular functions.
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Affiliation(s)
- Katarzyna Bialkowska
- Department of Cardiovascular and Metabolic Sciences, Lerner Research Institute Cleveland Clinic, Cleveland, OH, USA
| | - Khalid Sossey-Alaoui
- Department of Molecular Medicine, School of Medicine, Case Western Reserve University, Cleveland, OH, USA
| | - Elzbieta Pluskota
- Department of Cardiovascular and Metabolic Sciences, Lerner Research Institute Cleveland Clinic, Cleveland, OH, USA
| | - Lahoucine Izem
- Department of Cardiovascular and Metabolic Sciences, Lerner Research Institute Cleveland Clinic, Cleveland, OH, USA
| | - Jun Qin
- Department of Cardiovascular and Metabolic Sciences, Lerner Research Institute Cleveland Clinic, Cleveland, OH, USA
| | - Edward F Plow
- Department of Cardiovascular and Metabolic Sciences, Lerner Research Institute Cleveland Clinic, Cleveland, OH, USA
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Zhu K, Lai Y, Cao H, Bai X, Liu C, Yan Q, Ma L, Chen D, Kanaporis G, Wang J, Li L, Cheng T, Wang Y, Wu C, Xiao G. Kindlin-2 modulates MafA and β-catenin expression to regulate β-cell function and mass in mice. Nat Commun 2020; 11:484. [PMID: 31980627 PMCID: PMC6981167 DOI: 10.1038/s41467-019-14186-y] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2018] [Accepted: 12/16/2019] [Indexed: 12/11/2022] Open
Abstract
β-Cell dysfunction and reduction in β-cell mass are hallmark events of diabetes mellitus. Here we show that β-cells express abundant Kindlin-2 and deleting its expression causes severe diabetes-like phenotypes without markedly causing peripheral insulin resistance. Kindlin-2, through its C-terminal region, binds to and stabilizes MafA, which activates insulin expression. Kindlin-2 loss impairs insulin secretion in primary human and mouse islets in vitro and in mice by reducing, at least in part, Ca2+ release in β-cells. Kindlin-2 loss activates GSK-3β and downregulates β-catenin, leading to reduced β-cell proliferation and mass. Kindlin-2 loss reduces the percentage of β-cells and concomitantly increases that of α-cells during early pancreatic development. Genetic activation of β-catenin in β-cells restores the diabetes-like phenotypes induced by Kindlin-2 loss. Finally, the inducible deletion of β-cell Kindlin-2 causes diabetic phenotypes in adult mice. Collectively, our results establish an important function of Kindlin-2 and provide a potential therapeutic target for diabetes. Beta cell dysfunction and reduction in beta cell mass are hallmark events in the pathogenesis of diabetes mellitus. We identify focal adhesion protein Kindlin-2 as a key factor that controls insulin synthesis and secretion and beta cell mass by modulating MafA and beta-catenin proteins in pancreatic beta cells.
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Affiliation(s)
- Ke Zhu
- Department of Orthopedic Surgery, Rush University Medical Center, Chicago, IL, 60612, USA
| | - Yumei Lai
- Department of Orthopedic Surgery, Rush University Medical Center, Chicago, IL, 60612, USA
| | - Huiling Cao
- Guangdong Provincial Key Laboratory of Cell Microenvironment and Disease Research, Shenzhen Key Laboratory of Cell Microenvironment, and Department of Biology, Southern University of Science and Technology, 518055, Shenzhen, China
| | - Xiaochun Bai
- Department of Cell Biology, School of Basic Medical Sciences, Southern Medical University, 510515, Guangzhou, China
| | - Chuanju Liu
- Department of Orthopedic Surgery, New York University School of Medicine, New York, NY, 10003, USA.,Department of Cell Biology, New York University School of Medicine, New York, NY, 10016, USA
| | - Qinnan Yan
- Guangdong Provincial Key Laboratory of Cell Microenvironment and Disease Research, Shenzhen Key Laboratory of Cell Microenvironment, and Department of Biology, Southern University of Science and Technology, 518055, Shenzhen, China
| | - Liting Ma
- Guangdong Provincial Key Laboratory of Cell Microenvironment and Disease Research, Shenzhen Key Laboratory of Cell Microenvironment, and Department of Biology, Southern University of Science and Technology, 518055, Shenzhen, China
| | - Di Chen
- Department of Orthopedic Surgery, Rush University Medical Center, Chicago, IL, 60612, USA
| | - Giedrius Kanaporis
- Department of Molecular Biophysics and Physiology, Rush University Medical Center, Chicago, IL, 60612, USA
| | - Junqi Wang
- Guangdong Provincial Key Laboratory of Cell Microenvironment and Disease Research, Shenzhen Key Laboratory of Cell Microenvironment, and Department of Biology, Southern University of Science and Technology, 518055, Shenzhen, China
| | - Luyuan Li
- State Key Laboratory of Medicinal Chemical Biology and Nankai University College of Pharmacy, 300071, Tianjin, China
| | - Tao Cheng
- State Key Laboratory of Experimental Hematology, Institute of Hematology and Blood Disease Hospital, Center for Stem Cell Medicine, Chinese Academy of Medical Sciences & Peking Union Medical College, 300020, Tianjin, China
| | - Yong Wang
- UVA Islet Microfluidic Laboratory, Department of Surgery, the University of Virginia, Charlottesville, VA, 22908, USA
| | - Chuanyue Wu
- Department of Pathology, University of Pittsburgh, Pittsburgh, PA, 15261, USA.
| | - Guozhi Xiao
- Guangdong Provincial Key Laboratory of Cell Microenvironment and Disease Research, Shenzhen Key Laboratory of Cell Microenvironment, and Department of Biology, Southern University of Science and Technology, 518055, Shenzhen, China. .,Department of Orthopedic Surgery, Rush University Medical Center, Chicago, IL, 60612, USA.
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Regulation of cell adhesion: a collaborative effort of integrins, their ligands, cytoplasmic actors, and phosphorylation. Q Rev Biophys 2019; 52:e10. [PMID: 31709962 DOI: 10.1017/s0033583519000088] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Integrins are large heterodimeric type 1 membrane proteins expressed in all nucleated mammalian cells. Eighteen α-chains and eight β-chains can combine to form 24 different integrins. They are cell adhesion proteins, which bind to a large variety of cellular and extracellular ligands. Integrins are required for cell migration, hemostasis, translocation of cells out from the blood stream and further movement into tissues, but also for the immune response and tissue morphogenesis. Importantly, integrins are not usually active as such, but need activation to become adhesive. Integrins are activated by outside-in activation through integrin ligand binding, or by inside-out activation through intracellular signaling. An important question is how integrin activity is regulated, and this topic has recently drawn much attention. Changes in integrin affinity for ligand binding are due to allosteric structural alterations, but equally important are avidity changes due to integrin clustering in the plane of the plasma membrane. Recent studies have partially solved how integrin cell surface structures change during activation. The integrin cytoplasmic domains are relatively short, but by interacting with a variety of cytoplasmic proteins in a regulated manner, the integrins acquire a number of properties important not only for cell adhesion and movement, but also for cellular signaling. Recent work has shown that specific integrin phosphorylations play pivotal roles in the regulation of integrin activity. Our purpose in this review is to integrate the present knowledge to enable an understanding of how cell adhesion is dynamically regulated.
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Abstract
The endothelium physically separates blood from surrounding tissue and yet allows for the regulated passage of nutrients, waste, and leukocytes into and out of the circulation. Trans-endothelium flux occurs across endothelial cells (transcellular) and between endothelial cells (paracellular). Paracellular endothelial barrier function depends on the regulation of cell-cell junctions. Interestingly, a functional relationship between cell-cell junctions and cell-matrix adhesions has long been appreciated but the molecular mechanisms underpinning this relationship are not fully understood. Here we review the evidence that supports the notion that cell-matrix interactions contribute to the regulation of cell-cell junctions, focusing primarily on the important adherens junction protein VE-cadherin. In particular, we will discuss recent insights gained into how integrin signaling impacts VE-cadherin stability in adherens junctions and endothelial barrier function.
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Affiliation(s)
- Fadi E Pulous
- Department of Pediatrics, Aflac Cancer and Blood Disorders Center (FEP, BGP) and Cancer Biology Graduate Program (FEP), Emory University School of Medicine, Atlanta, GA, USA
| | - Brian G Petrich
- Department of Pediatrics, Aflac Cancer and Blood Disorders Center (FEP, BGP) and Cancer Biology Graduate Program (FEP), Emory University School of Medicine, Atlanta, GA, USA
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