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Carrasco G, Stavrou I, Treanor-Taylor M, Beetham H, Lee M, Masalmeh R, Carreras-Soldevila A, Hardman D, Bernabeu MO, von Kriegsheim A, Inman GJ, Byron A, Brunton VG. Involvement of Kindlin-1 in cutaneous squamous cell carcinoma. Oncogenesis 2024; 13:24. [PMID: 38982038 PMCID: PMC11233684 DOI: 10.1038/s41389-024-00526-1] [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: 12/26/2023] [Revised: 06/19/2024] [Accepted: 07/01/2024] [Indexed: 07/11/2024] Open
Abstract
Kindler syndrome (KS) is a rare genodermatosis resulting from loss-of-function mutations in FERMT1, the gene that encodes Kindlin-1. KS patients have a high propensity to develop aggressive and metastatic cutaneous squamous cell carcinoma (cSCC). Here we show in non-KS-associated patients that elevation of FERMT1 expression is increased in actinic keratoses compared to normal skin, with a further increase in cSCC supporting a pro-tumorigenic role in this population. In contrast, we show that loss of Kindlin-1 leads to increased SCC tumor growth in vivo and in 3D spheroids, which was associated with the development of a hypoxic tumor environment and increased glycolysis. The metalloproteinase Mmp13 was upregulated in Kindlin-1-depleted tumors, and increased expression of MMP13 was responsible for driving increased invasion of the Kindlin-1-depleted SCC cells. These results provide evidence that Kindlin-1 loss in SCC can promote invasion through the upregulation of MMP13, and offer novel insights into how Kindlin-1 loss leads to the development of a hypoxic environment that is permissive for tumor growth.
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Affiliation(s)
- Giovana Carrasco
- Edinburgh Cancer Research, Institute of Genetics and Cancer, University of Edinburgh, Edinburgh, EH4 2XR, UK.
| | - Ifigeneia Stavrou
- Edinburgh Cancer Research, Institute of Genetics and Cancer, University of Edinburgh, Edinburgh, EH4 2XR, UK
| | | | - Henry Beetham
- Edinburgh Cancer Research, Institute of Genetics and Cancer, University of Edinburgh, Edinburgh, EH4 2XR, UK
| | - Martin Lee
- Edinburgh Cancer Research, Institute of Genetics and Cancer, University of Edinburgh, Edinburgh, EH4 2XR, UK
| | - Roza Masalmeh
- Edinburgh Cancer Research, Institute of Genetics and Cancer, University of Edinburgh, Edinburgh, EH4 2XR, UK
| | - Artur Carreras-Soldevila
- Centre for Medical Informatics, Usher Institute, University of Edinburgh, Edinburgh, EH16 4UX, UK
| | - David Hardman
- Centre for Medical Informatics, Usher Institute, University of Edinburgh, Edinburgh, EH16 4UX, UK
| | - Miguel O Bernabeu
- Centre for Medical Informatics, Usher Institute, University of Edinburgh, Edinburgh, EH16 4UX, UK
- The Bayes Centre, University of Edinburgh, Edinburgh, EH8 9BT, UK
| | - Alex von Kriegsheim
- Edinburgh Cancer Research, Institute of Genetics and Cancer, University of Edinburgh, Edinburgh, EH4 2XR, UK
| | - Gareth J Inman
- CRUK Scotland Institute, Glasgow, G61 1BD, UK
- School of Cancer Sciences, University of Glasgow, Glasgow, G61 1QH, UK
| | - Adam Byron
- Edinburgh Cancer Research, Institute of Genetics and Cancer, University of Edinburgh, Edinburgh, EH4 2XR, UK
- Division of Molecular and Cellular Function, School of Biological Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Manchester Academic Health Science Centre, Manchester, M13 9PT, UK
| | - Valerie G Brunton
- Edinburgh Cancer Research, Institute of Genetics and Cancer, University of Edinburgh, Edinburgh, EH4 2XR, UK
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2
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Webb ER, Dodd GL, Noskova M, Bullock E, Muir M, Frame MC, Serrels A, Brunton VG. Kindlin-1 regulates IL-6 secretion and modulates the immune environment in breast cancer models. eLife 2023; 12:e85739. [PMID: 36883731 PMCID: PMC10023156 DOI: 10.7554/elife.85739] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Accepted: 03/08/2023] [Indexed: 03/09/2023] Open
Abstract
The adhesion protein Kindlin-1 is over-expressed in breast cancer where it is associated with metastasis-free survival; however, the mechanisms involved are poorly understood. Here, we report that Kindlin-1 promotes anti-tumor immune evasion in mouse models of breast cancer. Deletion of Kindlin-1 in Met-1 mammary tumor cells led to tumor regression following injection into immunocompetent hosts. This was associated with a reduction in tumor infiltrating Tregs. Similar changes in T cell populations were seen following depletion of Kindlin-1 in the polyomavirus middle T antigen (PyV MT)-driven mouse model of spontaneous mammary tumorigenesis. There was a significant increase in IL-6 secretion from Met-1 cells when Kindlin-1 was depleted and conditioned media from Kindlin-1-depleted cells led to a decrease in the ability of Tregs to suppress the proliferation of CD8+ T cells, which was dependent on IL-6. In addition, deletion of tumor-derived IL-6 in the Kindlin-1-depleted tumors reversed the reduction of tumor-infiltrating Tregs. Overall, these data identify a novel function for Kindlin-1 in regulation of anti-tumor immunity, and that Kindlin-1 dependent cytokine secretion can impact the tumor immune environment.
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Affiliation(s)
- Emily R Webb
- Cancer Research UK Edinburgh Centre, Institute of Genetics and Cancer, University of EdinburghEdinburghUnited Kingdom
| | - Georgia L Dodd
- Cancer Research UK Edinburgh Centre, Institute of Genetics and Cancer, University of EdinburghEdinburghUnited Kingdom
| | - Michaela Noskova
- Cancer Research UK Edinburgh Centre, Institute of Genetics and Cancer, University of EdinburghEdinburghUnited Kingdom
| | - Esme Bullock
- Cancer Research UK Edinburgh Centre, Institute of Genetics and Cancer, University of EdinburghEdinburghUnited Kingdom
| | - Morwenna Muir
- Cancer Research UK Edinburgh Centre, Institute of Genetics and Cancer, University of EdinburghEdinburghUnited Kingdom
| | - Margaret C Frame
- Cancer Research UK Edinburgh Centre, Institute of Genetics and Cancer, University of EdinburghEdinburghUnited Kingdom
| | - Alan Serrels
- Cancer Research UK Edinburgh Centre, Institute of Genetics and Cancer, University of EdinburghEdinburghUnited Kingdom
| | - Valerie G Brunton
- Cancer Research UK Edinburgh Centre, Institute of Genetics and Cancer, University of EdinburghEdinburghUnited Kingdom
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3
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Lertpatipanpong P, Sillapachaiyaporn C, Oh G, Kang YH, Hwang CY, Baek SJ. Effect of cold atmospheric microwave plasma (CAMP) on wound healing in canine keratinocytes. Front Cell Dev Biol 2023; 11:1105692. [PMID: 36760362 PMCID: PMC9905446 DOI: 10.3389/fcell.2023.1105692] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Accepted: 01/06/2023] [Indexed: 01/26/2023] Open
Abstract
Cutaneous wound healing is a biological process that occurs upon skin injury and involves different mechanisms to repair tissue damage. Improper healing or prolonged curation period of wound lesions may induce unpleasant complications. Cold atmospheric microwave plasma (CAMP) is an upcoming medical therapeutic option for skin infection and wound treatment. However, the molecular mechanisms of CAMP-mediated canine wound healing are not well characterized. Wound-healing activity was examined to elucidate the biological effects and molecular mechanisms of CAMP. Canine keratinocytes (CPEKs) were treated using CAMP, and their wound-healing activities were evaluated. The molecular mechanisms of that effect were examined, based on RNA-Seq analysis data, and verified using immunoblotting and polymerase chain reaction. It was found that the CAMP-treated cells exhibited a significant increase in cell migration evaluated by scratch assay in human keratinocytes (HaCaT) and canine keratinocytes (CPEK). Additionally, CAMP-treated CPEK cells showed a significant positive effect on cell invasion. The RNA-Seq data revealed that CAMP alters different genes and pathways in CPEK cells. Gene expression involved in the cell cycle, cell proliferation, angiogenesis, cell adhesion, and wound healing was upregulated in CAMP-treated cells compared with gas-activated media used as a control. The Hippo pathway was also analyzed, and the protein and mRNA levels of YAP were significantly increased in CAMP-treated cells. CAMP-treated CPEK cells indicated the downregulation of E-cadherin and upregulation of vimentin, Snail, and Slug at transcription and translation levels, contributing to a favorable effect on cell migration. Our findings suggested that CAMP treatment provided beneficial effects on the curative wound process through the induction of genes involved in wound healing, promotion of EMT, and increase in the molecular targets in the Hippo signaling pathway.
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Affiliation(s)
- Pattawika Lertpatipanpong
- Laboratory of Signal Transduction, Research Institute for Veterinary Science, College of Veterinary Medicine, Seoul National University, Seoul, South Korea
| | - Chanin Sillapachaiyaporn
- Laboratory of Signal Transduction, Research Institute for Veterinary Science, College of Veterinary Medicine, Seoul National University, Seoul, South Korea,Program in Clinical Biochemistry and Molecular Medicine, Department of Clinical Chemistry, Faculty of Allied Health Sciences, Chulalongkorn University, Bangkok, Thailand
| | - Garam Oh
- Laboratory of Signal Transduction, Research Institute for Veterinary Science, College of Veterinary Medicine, Seoul National University, Seoul, South Korea
| | - Yeong-Hun Kang
- Laboratory of Veterinary Dermatology, Research Institute for Veterinary Science, College of Veterinary Medicine, Seoul National University, Seoul, South Korea
| | - Cheol-Yong Hwang
- Laboratory of Veterinary Dermatology, Research Institute for Veterinary Science, College of Veterinary Medicine, Seoul National University, Seoul, South Korea
| | - Seung Joon Baek
- Laboratory of Signal Transduction, Research Institute for Veterinary Science, College of Veterinary Medicine, Seoul National University, Seoul, South Korea,*Correspondence: Seung Joon Baek,
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Kindlin-2 loss in condylar chondrocytes causes spontaneous osteoarthritic lesions in the temporomandibular joint in mice. Int J Oral Sci 2022; 14:33. [PMID: 35788130 PMCID: PMC9253313 DOI: 10.1038/s41368-022-00185-1] [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: 01/10/2022] [Revised: 05/25/2022] [Accepted: 05/28/2022] [Indexed: 11/16/2022] Open
Abstract
The progressive destruction of condylar cartilage is a hallmark of the temporomandibular joint (TMJ) osteoarthritis (OA); however, its mechanism is incompletely understood. Here, we show that Kindlin-2, a key focal adhesion protein, is strongly detected in cells of mandibular condylar cartilage in mice. We find that genetic ablation of Kindlin-2 in aggrecan-expressing condylar chondrocytes induces multiple spontaneous osteoarthritic lesions, including progressive cartilage loss and deformation, surface fissures, and ectopic cartilage and bone formation in TMJ. Kindlin-2 loss significantly downregulates the expression of aggrecan, Col2a1 and Proteoglycan 4 (Prg4), all anabolic extracellular matrix proteins, and promotes catabolic metabolism in TMJ cartilage by inducing expression of Runx2 and Mmp13 in condylar chondrocytes. Kindlin-2 loss decreases TMJ chondrocyte proliferation in condylar cartilages. Furthermore, Kindlin-2 loss promotes the release of cytochrome c as well as caspase 3 activation, and accelerates chondrocyte apoptosis in vitro and TMJ. Collectively, these findings reveal a crucial role of Kindlin-2 in condylar chondrocytes to maintain TMJ homeostasis.
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Yilmaz P, Marek SJ, Valari M, He Y, Has C. Characterization of amino acid substitutions and deletions in the kindlin-1 FERM domain: relevance for precision medicine. J Invest Dermatol 2022; 142:2415-2423.e1. [PMID: 35189150 DOI: 10.1016/j.jid.2022.01.032] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2021] [Revised: 12/26/2021] [Accepted: 01/23/2022] [Indexed: 11/30/2022]
Abstract
Kindler epidermolysis bullosa is a genodermatosis that manifests with cutaneous and mucosal fragility, and with photosensitivity. No cure is available to date. Kindlin-1, the deficient protein binds to β intergrin and is required for its activation. Using a previously established experimental workflow we addressed the consequences of three naturally occurring mutations leading either to single amino acid substitutions, p.Y293D and p.W559R, or to a single amino acid deletion p.I623del in kindlin-1. We show that p.Y293D disrupts kindlin-1 localization to focal adhesions and cell spreading. Although, treatment with a chemical chaperone increases the amount of mutant protein, spreading does not improve and cellular stress increases. In contrast, the mutations p.W559R and p.I623del do not interfere with kindlin-1 localization to focal adhesions and support cell adhesion and survival. These mutants are also responsive to the treatment with chemical chaperone, and the increased mutant proteins improve cell spreading. These findings suggest that low levels of mutant kindlins, p.W559R and p.I623del are able to rescue some important cellular functions. Patients carrying these mutations could benefit from treatment with promotors of proteostasis. Our results show that each mutation must be individually tested on genetic, molecular and cellular level to tailor personalized treatments for patients.
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Affiliation(s)
- Pelinsu Yilmaz
- Department of Dermatology, Medical Center - University of Freiburg, Freiburg, Faculty of Medicine, University of Freiburg, Germany; Department of Dermatology and Allergy, University Hospital Augsburg, Germany
| | - Sarah-Jane Marek
- Department of Dermatology, Medical Center - University of Freiburg, Freiburg, Faculty of Medicine, University of Freiburg, Germany
| | - Manthoula Valari
- First Department of Pediatrics, Medical School National and Kapodistrian University of Athens, "Agia Sofia Childrens Hospital", Athens, Greece
| | - Yinghong He
- Department of Dermatology, Medical Center - University of Freiburg, Freiburg, Faculty of Medicine, University of Freiburg, Germany
| | - Cristina Has
- Department of Dermatology, Medical Center - University of Freiburg, Freiburg, Faculty of Medicine, University of Freiburg, Germany.
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Zhao B, Pan Y, Xu H, Song X. Wnt10a/β-catenin signalling is involved in kindlin-1-mediated astrocyte activation in a chronic construction injury rat model. Eur J Neurosci 2021; 54:7409-7421. [PMID: 34618385 DOI: 10.1111/ejn.15488] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2021] [Revised: 09/23/2021] [Accepted: 09/27/2021] [Indexed: 11/28/2022]
Abstract
The activation of spinal astrocytes and release of neuroinflammatory mediators are important events in neuropathic pain (NP) pathogenesis. In this study, we investigated the role of Wnt10a/β-catenin signalling in kindlin-1-mediated astrocyte activation using a chronic constriction injury (CCI) NP rat model. Using kindlin-1 overexpression and knockdown plasmids, we assessed hyperalgesia, changes in spinal astrocyte activation and the release of inflammatory mediators in a NP rat model. We also performed coimmunoprecipitation, Western blotting and real-time polymerase chain reaction (PCR) to characterize the underlying mechanisms of kindlin-1 in astrocyte cultures in vitro. Kindlin-1 was significantly upregulated in CCI rats and promoted hyperalgesia. Moreover, we observed increased kindlin-1, Wnt10a and glial fibrillary acidic protein (GFAP; biomarker for astroglial injury) levels and the release of inflammatory mediators in NP rats (p < 0.05). Inhibiting GFAP in vitro led to decreased kindlin-1 levels, prevented astrocyte activation, decreased Wnt10a level and the release of inflammatory mediators (p < 0.05). Coimmunoprecipitation showed that kindlin-1 can interact with Wnt10a. We showed that kindlin-1-mediated astrocyte activation was associated with Wnt10a/β-catenin signalling and the downstream release of inflammatory mediators in a CCI NP rat model. Our findings provide novel insights into the molecular mechanisms of kindlin-1-mediated astrocyte activation after CCI.
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Affiliation(s)
- Baisong Zhao
- Department of Anesthesiology, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, China
| | - Yongying Pan
- Department of Anesthesiology, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, China
| | - Haiping Xu
- Department of Anesthesiology, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, China
| | - Xingrong Song
- Department of Anesthesiology, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, China
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7
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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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8
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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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9
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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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10
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Distinct expression profiles and functions of Kindlins in breast cancer. JOURNAL OF EXPERIMENTAL & CLINICAL CANCER RESEARCH : CR 2018; 37:281. [PMID: 30477537 PMCID: PMC6260766 DOI: 10.1186/s13046-018-0955-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/06/2018] [Accepted: 11/09/2018] [Indexed: 12/20/2022]
Abstract
Background Kindlin-1, − 2, and − 3 are the three members of the Kindlin family. They are best known as regulators of integrin functions, contributing to fundamental biological processes such as cell survival, adhesion and migration. Their deregulation leads to diverse pathologies including a broad range of cancers in which both, tumor-promoting and tumor-inhibiting functions have been described. Methods To better characterize Kindlins implication in breast cancer, in vitro experiments were performed in a series of cancer cell lines. We first assessed their expression profiles and subcellular distributions. Then, their involvement in breast cancer cell morphology, migration and invasion was verified by examining phenotypic changes induced by the depletion of either isoforms using RNA interference. An expression study was performed in a series of breast cancer patient derived xenografts (n = 58) to define the epithelial and stromal contribution of each Kindlin. Finally, we analyzed the expression levels of the three Kindlins in a large series of human breast tumors, at the RNA (n = 438) and protein (n = 129) levels and we evaluated their correlation with the clinical outcome. Results We determined that Kindlin-1 and Kindlin-2, but not Kindlin-3, were expressed in breast tumor cells. We uncovered the compensatory roles of Kindlin-1 and -2 in focal adhesion dynamics and cell motility. Remarkably, Kindlin-2 had a predominant effect on cell spreading and Kindlin-1 on cell invasion. In line with these experimental observations, Kindlin-1 overexpression was associated with a worse patients’ outcome. Notably, Kindlin-3, expressed by tumor infiltrating leukocytes, also correlated with a poor prognosis of breast cancer patients. Conclusion This study demonstrates that each one of the Kindlin family members has a different expression profile emphasizing their redundant and complementary roles in breast tumor cells. We highlight the specific link between Kindlin-1 and breast cancer progression. In addition, Kindlin-3 overexpression in the tumor microenvironment is associated with more aggressive breast tumors. These results suggest that Kindlins play distinctive roles in breast cancer. Kindlins may be useful in identifying breast cancer patients with a worst prognosis and may offer new avenues for therapeutic intervention against cancer progression. Electronic supplementary material The online version of this article (10.1186/s13046-018-0955-4) contains supplementary material, which is available to authorized users.
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11
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Zhan J, Zhang H. Kindlins: Roles in development and cancer progression. Int J Biochem Cell Biol 2018; 98:93-103. [PMID: 29544897 DOI: 10.1016/j.biocel.2018.03.008] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2017] [Revised: 03/09/2018] [Accepted: 03/12/2018] [Indexed: 12/15/2022]
Abstract
The Kindlins are FERM domain proteins comprising three members (Kindlin-1, -2 and -3) which are evolutionarily conserved. Kindlins bind with β-integrin cytoplasmic tails and execute broad biological functions including directed cell migration, proliferation, differentiation and survival. In light of more and more evidence point to the importance of Kindlin family members in normal development and human diseases especially in cancers, we aim to portrait the profile of Kindlins in the regulation of embryonic development and cancer progression. We first summarize all the known binding proteins for individual member of Kindlin family. We then outline the Kindlin-regulated signaling pathways including Wnt/β-catenin, TGFβ, EGFR, and Hedgehog signalings. Furthermore, we descript the pivotal role of Kindlins in embryonic development in detail with notions that Kindlin-1 is highly expressed in endo/ectodermal originated tissues, Kindlin-2 is highly expressed in mesoderm-derived tissues and Kindlin-3 is highly expressed in mesoderm- and ectoderm-derived tissues. Deregulation of Kindlins is generally reported in cancers from different organs. We also briefly descript the role of Kindlins in other diseases. Finally, we update the recent understanding of how Kindlins are regulated and modified as well as the degradation mechanism of Kindlins, respectively.
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Affiliation(s)
- Jun Zhan
- Peking University Health Science Center, Department of Anatomy, Histology and Embryology, Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), and State Key Laboratory of Natural and Biomimetic Drugs, Beijing 100191, China
| | - Hongquan Zhang
- Peking University Health Science Center, Department of Anatomy, Histology and Embryology, Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), and State Key Laboratory of Natural and Biomimetic Drugs, Beijing 100191, China.
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12
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FERMT2 links cortical actin structures, plasma membrane tension and focal adhesion function to stabilize podocyte morphology. Matrix Biol 2018; 68-69:263-279. [PMID: 29337051 DOI: 10.1016/j.matbio.2018.01.003] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2017] [Revised: 01/03/2018] [Accepted: 01/03/2018] [Indexed: 01/30/2023]
Abstract
Simplification and retraction of podocyte protrusions, generally termed as foot process effacement, is a uniform pathological pattern observed in the majority of glomerular disease, including focal segmental glomerulosclerosis. However, it is still incompletely understood how the interaction of cortical actin structures, actomyosin contractility and focal adhesions, is being orchestrated to control foot process morphology in health and disease. By uncovering the functional role of fermitin family member 2 (FERMT2 or kindlin-2) in podocytes, we provide now evidence, how cell-extracellular matrix (ECM) interactions modulate membrane tension and actomyosin contractility. A genetic modeling approach was applied by deleting FERMT2 in a set of in vivo systems as well as in CRISPR/Cas9 modified human podocytes. Loss of FERMT2 results in altered cortical actin composition, cell cortex destabilization associated with plasma membrane blebbing and a remodeling of focal adhesions. We further show that FERMT2 knockout podocytes have high levels of RhoA activation and concomitantly increased actomyosin contractility. Inhibition of actomyosin tension reverses the membrane blebbing phenotype. Thus, our findings establish a direct link between cell-matrix adhesions, cortical actin structures and plasma membrane tension allowing to better explain cell morphological changes in foot process effacement.
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13
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Has C, He Y. Renal-skin syndromes. Cell Tissue Res 2017; 369:63-73. [DOI: 10.1007/s00441-017-2623-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2017] [Accepted: 04/03/2017] [Indexed: 12/16/2022]
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14
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Shen C, Sun L, Zhu N, Qi F. Kindlin-1 contributes to EGF-induced re-epithelialization in skin wound healing. Int J Mol Med 2017; 39:949-959. [PMID: 28290610 PMCID: PMC5360437 DOI: 10.3892/ijmm.2017.2911] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2016] [Accepted: 02/21/2017] [Indexed: 02/04/2023] Open
Abstract
The commercial use of epidermal growth factor (EGF) is extensive and has been shown to be effective for skin wound healing in clinical practice. There is evidence to indicate that the topical administration of EGF significantly accelerates re-epithelialization by promoting keratinocyte mitogenesis and migration following acute injury; however, the mechanisms involved remain to be elucidated. Thus, in this study, we focused on Kindlin-1, a four-point-one, ezrin, radixin, moesin (FERM)-domain-containing adaptor protein, and report its contribution to EGF-induced re-epithelialization in skin wound healing. In tissue samples, the expression of Kindlin-1 was induced upon EGF treatment compared to that in the natural healing group. In immortalized human keratinocytes (HaCaT cells), we further proved that Kindlin-1 was necessary for mediating EGF-induced activation signals, including integrin β1 activation, focal adhesion kinase (FAK) phosphorylation and actin re-organization, which finally led to enhanced cell proliferation and migration. These results indicate that Kindlin-1 is essential in EGF-induced re-epithelialization in skin wound healing and provide additional rationale for the clinical application of EGF in the treatment of acute wounds.
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Affiliation(s)
- Congcong Shen
- Department of Plastic Surgery, Zhongshan Hospital, Fudan University, Shanghai 200032, P.R. China
| | - Linlin Sun
- Department of Biochemistry and Molecular Biology, Basic Medical College of Fudan University, Shanghai 200032, P.R. China
| | - Ningwen Zhu
- Department of Dermatology, Huashan Hospital, Fudan University, Shanghai 200040, P.R. China
| | - Fazhi Qi
- Department of Plastic Surgery, Zhongshan Hospital, Fudan University, Shanghai 200032, P.R. China
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15
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He Y, Maier K, Leppert J, Hausser I, Schwieger-Briel A, Weibel L, Theiler M, Kiritsi D, Busch H, Boerries M, Hannula-Jouppi K, Heikkilä H, Tasanen K, Castiglia D, Zambruno G, Has C. Monoallelic Mutations in the Translation Initiation Codon of KLHL24 Cause Skin Fragility. Am J Hum Genet 2016; 99:1395-1404. [PMID: 27889062 DOI: 10.1016/j.ajhg.2016.11.005] [Citation(s) in RCA: 61] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2016] [Accepted: 11/07/2016] [Indexed: 11/28/2022] Open
Abstract
The genetic basis of epidermolysis bullosa, a group of genetic disorders characterized by the mechanically induced formation of skin blisters, is largely known, but a number of cases still remain genetically unsolved. Here, we used whole-exome and targeted sequencing to identify monoallelic mutations, c.1A>G and c.2T>C, in the translation initiation codon of the gene encoding kelch-like protein 24 (KLHL24) in 14 individuals with a distinct skin-fragility phenotype and skin cleavage within basal keratinocytes. Remarkably, mutation c.1A>G occurred de novo and was recurrent in families originating from different countries. The striking similarities of the clinical features of the affected individuals point to a unique and very specific pathomechanism. We showed that mutations in the translation initiation codon of KLHL24 lead to the usage of a downstream translation initiation site with the same reading frame and formation of a truncated polypeptide. The pathobiology was examined in keratinocytes and fibroblasts of the affected individuals and via expression of mutant KLHL24, and we found mutant KLHL24 to be associated with abnormalities of intermediate filaments in keratinocytes and fibroblasts. In particular, KLHL24 mutations were associated with irregular and fragmented keratin 14. Recombinant overexpression of normal KLHL24 promoted keratin 14 degradation, whereas mutant KLHL24 showed less activity than the normal molecule. These findings identify KLHL24 mutations as a cause of skin fragility and identify a role for KLHL24 in maintaining the balance between intermediate filament stability and degradation required for skin integrity.
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Affiliation(s)
- Yinghong He
- Department of Dermatology, University Medical Center Freiburg, Freiburg 79104, Germany
| | - Kristin Maier
- Department of Dermatology, University Medical Center Freiburg, Freiburg 79104, Germany
| | - Juna Leppert
- Department of Dermatology, University Medical Center Freiburg, Freiburg 79104, Germany
| | - Ingrid Hausser
- Department of Pathology, University of Heidelberg, Heidelberg 69120, Germany
| | - Agnes Schwieger-Briel
- Department of Paediatric Dermatology, University Children's Hospital Zurich, Zurich 8091, Switzerland; Department of Dermatology, University Hospital Zurich, Zurich 8091, Switzerland
| | - Lisa Weibel
- Department of Paediatric Dermatology, University Children's Hospital Zurich, Zurich 8091, Switzerland; Department of Dermatology, University Hospital Zurich, Zurich 8091, Switzerland
| | - Martin Theiler
- Department of Paediatric Dermatology, University Children's Hospital Zurich, Zurich 8091, Switzerland; Department of Dermatology, University Hospital Zurich, Zurich 8091, Switzerland
| | - Dimitra Kiritsi
- Department of Dermatology, University Medical Center Freiburg, Freiburg 79104, Germany
| | - Hauke Busch
- Systems Biology of the Cellular Microenvironment Group, Institute of Molecular Medicine and Cell Research, Albert-Ludwigs-University Freiburg, Freiburg 79104, Germany; German Cancer Consortium (DKTK), German Cancer Research Center (DKFZ), Heidelberg 69120, Germany; Comprehensive Cancer Center Freiburg, Freiburg 79106, Germany
| | - Melanie Boerries
- Systems Biology of the Cellular Microenvironment Group, Institute of Molecular Medicine and Cell Research, Albert-Ludwigs-University Freiburg, Freiburg 79104, Germany; German Cancer Consortium (DKTK), German Cancer Research Center (DKFZ), Heidelberg 69120, Germany; Comprehensive Cancer Center Freiburg, Freiburg 79106, Germany
| | - Katariina Hannula-Jouppi
- Department of Dermatology and Allergology, University of Helsinki and Helsinki University Hospital, Helsinki 00014, Finland; Folkhälsan Institute of Genetics, University of Helsinki, Helsinki 00014, Finland
| | - Hannele Heikkilä
- Department of Dermatology and Allergology, University of Helsinki and Helsinki University Hospital, Helsinki 00014, Finland
| | - Kaisa Tasanen
- Department of Dermatology, PEDEGO Research Unit, Medical Research Center Oulu, Oulu University Hospital and University of Oulu, Oulu 90014, Finland
| | - Daniele Castiglia
- Laboratory of Molecular and Cell Biology, Istituto Dermopatico dell'Immacolata, Istituto di Ricovero e Cura a Carattere Scientifico, Rome 00167, Italy
| | - Giovanna Zambruno
- Genetic and Rare Diseases Research Area, Bambino Gesù Children's Hospital, Istituto di Ricovero e Cura a Carattere Scientifico, Rome 00165, Italy
| | - Cristina Has
- Department of Dermatology, University Medical Center Freiburg, Freiburg 79104, Germany.
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16
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Rognoni E, Ruppert R, Fässler R. The kindlin family: functions, signaling properties and implications for human disease. J Cell Sci 2016; 129:17-27. [PMID: 26729028 DOI: 10.1242/jcs.161190] [Citation(s) in RCA: 157] [Impact Index Per Article: 19.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
The kindlin (or fermitin) family of proteins comprises three members (kindlin-1,-2 and -3) of evolutionarily conserved focal adhesion (FA) proteins, whose best-known task is to increase integrin affinity for a ligand (also referred as integrin activation) through binding of β-integrin tails. The consequence of kindlin-mediated integrin activation and integrin-ligand binding is cell adhesion, spreading and migration, assembly of the extracellular matrix (ECM), cell survival, proliferation and differentiation. Another hallmark of kindlins is their involvement in disease. Mutations in the KINDLIN-1 (also known as FERMT1) gene cause Kindler syndrome (KS)--in which mainly skin and intestine are affected, whereas mutations in the KINDLIN-3 (also known as FERMT3) gene cause leukocyte adhesion deficiency type III (LAD III), which is characterized by impaired extravasation of blood effector cells and severe, spontaneous bleedings. Also, aberrant expression of kindlins in various forms of cancer and in tissue fibrosis has been reported. Although the malfunctioning of integrins represent a major cause leading to kindlin-associated diseases, increasing evidence also point to integrin-independent functions of kindlins that play an important role in the pathogenesis of certain disease aspects. Furthermore, isoform-specific kindlin functions have been discovered, explaining, for example, why loss of kindlins differentially affects tissue stem cell homeostasis or tumor development. This Commentary focuses on new and isoform-specific kindlin functions in different tissues and discusses their potential role in disease development and progression.
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Affiliation(s)
- Emanuel Rognoni
- Max Planck Institute of Biochemistry, Martinsried 82152, Germany
| | - Raphael Ruppert
- Max Planck Institute of Biochemistry, Martinsried 82152, Germany
| | - Reinhard Fässler
- Max Planck Institute of Biochemistry, Martinsried 82152, Germany
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17
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Zhang G, Gu Y, Begum R, Chen H, Gao X, McGrath JA, Parsons M, Song B. Kindlin-1 Regulates Keratinocyte Electrotaxis. J Invest Dermatol 2016; 136:2229-2239. [PMID: 27427485 PMCID: PMC5756539 DOI: 10.1016/j.jid.2016.05.129] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2015] [Revised: 04/18/2016] [Accepted: 05/10/2016] [Indexed: 12/05/2022]
Abstract
Kindler syndrome (KS) is an autosomal recessive blistering skin disease resulting from pathogenic mutations in FERMT1. This gene encodes kindlin-1, a focal adhesion protein involved in activation of the integrin family of extracellular matrix receptors. Most cases of KS show a marked reduction or complete absence of the kindlin-1 protein in keratinocytes, resulting in defective cell adhesion and migration. Electric fields also act as intrinsic regulators of adhesion and migration in the skin, but the molecular mechanisms by which this occurs are poorly understood. Here we show that keratinocytes derived from KS patients are unable to undergo electrotaxis, and this defect is restored by overexpression of wild-type kindlin-1 but not a W612A mutation that prevents kindlin-integrin binding. Moreover, deletion of the pleckstrin homology domain of kindlin-1 also failed to rescue electrotaxis in KS cells, indicating that both integrin and lipid binding are required for this function. Kindlin-1 was also required for the maintenance of lamellipodial protrusions during electrotaxis via electric field-activated β1 integrin. Indeed, inhibition of β1 integrins also leads to loss of electrotaxis in keratinocytes. Our data suggest that loss of kindlin-1 function may therefore result in epithelial insensitivity to electric fields and contribute to KS disease pathology.
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Affiliation(s)
- Gaofeng Zhang
- Department of Dermatology, No. 1 Hospital of China Medical University, Shenyang, China; School of Dentistry, College of Biomedical and Life Sciences, Cardiff University, Cardiff, UK
| | - Yu Gu
- School of Dentistry, College of Biomedical and Life Sciences, Cardiff University, Cardiff, UK
| | - Rumena Begum
- Randall Division of Cell and Molecular Biophysics, Kings College London, London, UK
| | - Hongduo Chen
- Department of Dermatology, No. 1 Hospital of China Medical University, Shenyang, China
| | - Xinghua Gao
- Department of Dermatology, No. 1 Hospital of China Medical University, Shenyang, China
| | - John A McGrath
- St. Johns Institute of Dermatology, King's College London, Guys Campus, London, UK
| | - Maddy Parsons
- Randall Division of Cell and Molecular Biophysics, Kings College London, London, UK.
| | - Bing Song
- Department of Dermatology, No. 1 Hospital of China Medical University, Shenyang, China; School of Dentistry, College of Biomedical and Life Sciences, Cardiff University, Cardiff, UK.
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18
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Dong JM, Tay FPL, Swa HLF, Gunaratne J, Leung T, Burke B, Manser E. Proximity biotinylation provides insight into the molecular composition of focal adhesions at the nanometer scale. Sci Signal 2016; 9:rs4. [PMID: 27303058 DOI: 10.1126/scisignal.aaf3572] [Citation(s) in RCA: 66] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Focal adhesions are protein complexes that link metazoan cells to the extracellular matrix through the integrin family of transmembrane proteins. Integrins recruit many proteins to these complexes, referred to as the "adhesome." We used proximity-dependent biotinylation (BioID) in U2OS osteosarcoma cells to label proteins within 15 to 25 nm of paxillin, a cytoplasmic focal adhesion protein, and kindlin-2, which directly binds β integrins. Using mass spectrometry analysis of the biotinylated proteins, we identified 27 known adhesome proteins and 8 previously unknown components close to paxillin. However, only seven of these proteins interacted directly with paxillin, one of which was the adaptor protein Kank2. The proteins in proximity to β integrin included 15 of the adhesion proteins identified in the paxillin BioID data set. BioID also correctly established kindlin-2 as a cell-cell junction protein. By focusing on this smaller data set, new partners for kindlin-2 were found, namely, the endocytosis-promoting proteins liprin β1 and EFR3A, but, contrary to previous reports, not the filamin-binding protein migfilin. A model adhesome based on both data sets suggests that focal adhesions contain fewer components than previously suspected and that paxillin lies away from the plasma membrane. These data not only illustrate the power of using BioID and stable isotope-labeled mass spectrometry to define macromolecular complexes but also enable the correct identification of therapeutic targets within the adhesome.
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Affiliation(s)
- Jing-Ming Dong
- sGSK Group, Institute of Molecular and Cell Biology, Agency for Science Technology and Research, Proteos Building, 61 Biopolis Drive, Singapore 138673, Singapore
| | - Felicia Pei-Ling Tay
- sGSK Group, Institute of Molecular and Cell Biology, Agency for Science Technology and Research, Proteos Building, 61 Biopolis Drive, Singapore 138673, Singapore
| | - Hannah Lee-Foon Swa
- Quantitative Proteomics Group, Institute of Molecular and Cell Biology, Agency for Science Technology and Research, Singapore 138673, Singapore
| | - Jayantha Gunaratne
- Quantitative Proteomics Group, Institute of Molecular and Cell Biology, Agency for Science Technology and Research, Singapore 138673, Singapore. Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117597, Singapore
| | - Thomas Leung
- sGSK Group, Institute of Molecular and Cell Biology, Agency for Science Technology and Research, Proteos Building, 61 Biopolis Drive, Singapore 138673, Singapore
| | - Brian Burke
- Institute of Medical Biology, 8A Biomedical Grove, #06-06 Immunos Building, Singapore 138648, Singapore
| | - Ed Manser
- sGSK Group, Institute of Molecular and Cell Biology, Agency for Science Technology and Research, Proteos Building, 61 Biopolis Drive, Singapore 138673, Singapore. Institute of Medical Biology, 8A Biomedical Grove, #06-06 Immunos Building, Singapore 138648, Singapore. Department of Pharmacology, National University of Singapore, Singapore 117597, Singapore.
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19
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Albanova VI, Smolyannikova VA, Golchenko VA. Kindler syndrome - a rare type of hereditary epidermolysis bullosa. VESTNIK DERMATOLOGII I VENEROLOGII 2015. [DOI: 10.25208/0042-4609-2015-91-4-95-104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022] Open
Abstract
The Kindler syndrome is one of the types of hereditary epidermolysis bullosa with its onset related to mutations of the KIND1 gene. The authors describe a case of a family with three members suffering from this rare disease. All of these patients have typical clinical manifestations of the Kindler syndrome such as the formation of blisters on the skin and mucous membranes right after the birth, scarring with the formation of contractures, pseudosyndactyly, microstomia and ankyloglossia, progressive poikiloderma, photosensibility, affections of the gastrointestinal tract - dysphagia, esophagostenosis, stool disorders, dental pathology, phimosis vaginalis in women.
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20
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Has C, Nyström A. Epidermal Basement Membrane in Health and Disease. CURRENT TOPICS IN MEMBRANES 2015; 76:117-70. [PMID: 26610913 DOI: 10.1016/bs.ctm.2015.05.003] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Skin, as the organ protecting the individual from environmental aggressions, constantly meets external insults and is dependent on mechanical toughness for its preserved function. Accordingly, the epidermal basement membrane (BM) zone has adapted to enforce tissue integrity. It harbors anchoring structures created through unique organization of common BM components and expression of proteins exclusive to the epidermal BM zone. Evidence for the importance of its correct assembly and the nonredundancy of its components for skin integrity is apparent from the multiple skin blistering disorders caused by mutations in genes coding for proteins associated with the epidermal BM and from autoimmune disorders in which autoantibodies target these molecules. However, it has become clear that these proteins not only provide mechanical support but are also critically involved in tissue homeostasis, repair, and regeneration. In this chapter, we provide an overview of the unique organization and components of the epidermal BM. A special focus will be given to its function during regeneration, and in inherited and acquired diseases.
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Affiliation(s)
- Cristina Has
- Department of Dermatology, University Medical Center Freiburg, Freiburg, Germany
| | - Alexander Nyström
- Department of Dermatology, University Medical Center Freiburg, Freiburg, Germany
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21
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Zhan J, Yang M, Zhang J, Guo Y, Liu W, Zhang H. Kindler syndrome protein Kindlin-1 is mainly expressed in adult tissues originating from ectoderm/endoderm. SCIENCE CHINA-LIFE SCIENCES 2015; 58:432-41. [PMID: 25591451 DOI: 10.1007/s11427-014-4775-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2014] [Accepted: 10/03/2014] [Indexed: 12/19/2022]
Abstract
Mutations of integrin-interacting protein Kindlin-1 cause Kindler syndrome and deregulation of Kindlin-1 is implicated in human cancers. The Kindlin-1-related diseases are confined in limited tissue types. However, Kindlin-1 tissue distribution and the dogma that governs Kindlin-1 expression in normal human body are elusive. This study examined Kindlin-1 expression in normal human adult organs, human and mouse embryonic organs by immunohistochemical analyses. We identified a general principle that the level of Kindlin-1 expression in tissues is tightly correlated with the corresponding germ layers from which these tissues originate. We compared the expression of Kindlin-1 with Kindlin-2 and found that Kindlin-1 is highly expressed in epithelial tissues derived from ectoderm and endoderm, whereas Kindlin-2 is mainly expressed in mesoderm-derived tissues. Likewise, Kindlin-1 was also found highly expressed in endoderm/ectoderm-derived tissues in human and mouse embryos. Our findings indicate that Kindlin-1 may play an importance role in the development of endoderm/ectoderm related tissues.
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Affiliation(s)
- Jun Zhan
- Key Laboratory of Carcinogenesis and Translational Research, Ministry of Education, State Key Laboratory of Natural and Biomimetic Drugs, Peking University Health Science Center, Beijing, 100191, China
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22
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Abstract
Kindler syndrome (KS) in humans is a severe skin blistering disease associated with inflammation and increased risk of epidermal squamous cell carcinoma (SCC). This disease is known to be caused by loss-of-function mutations in Kindlin-1, a focal adhesion β-integrin binding protein. Thus far, it has been unclear what specific signaling events occur in KS keratinocytes to promote tumorigenesis, especially since loss of β-integrins and focal adhesion complexes has been previously shown to prevent or delay tumor formation. In the April issue of Nature Medicine, Rognoni and colleagues generate a transgenic mouse lacking Kindlin-1 in the epidermis to model the key features of KS, and show that Kindlin-1 regulates Wnt and TGFβ signaling independent of β-integrins. These β1-integrin-independent functions of Kindlin-1 may contribute to the increased SCC risk in KS patients.
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Affiliation(s)
| | - Todd W Ridky
- Department of Dermatology; University of Pennsylvania; Philadelphia, PA USA
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He Y, Sonnenwald T, Sprenger A, Hansen U, Dengjel J, Bruckner-Tuderman L, Schmidt G, Has C. RhoA activation by CNFy restores cell-cell adhesion in kindlin-2-deficient keratinocytes. J Pathol 2014; 233:269-80. [PMID: 24615351 DOI: 10.1002/path.4350] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2014] [Revised: 02/25/2014] [Accepted: 03/03/2014] [Indexed: 12/11/2022]
Abstract
Kindlins are a family of integrin adapter and cell-matrix adhesion proteins causally linked to human genetic disorders. Kindlin-2 is a ubiquitously expressed protein with manifold functions and interactions. The contribution of kindlin-2 to integrin-based cell-matrix adhesions has been extensively explored, while other integrin-independent roles emerge. Because of the early involvement of kindlin-2 in development, no viable animal models with its constitutional knockout are available to study its physiological functions in adult skin. Here, we uncovered a critical physiological role of kindlin-2 in the epidermis by using a skin-equivalent model with shRNA-mediated knock-down of kindlin-2 in keratinocytes. Kindlin-2-deficient keratinocytes built stratified epidermal layers, but displayed impaired dermal-epidermal and intra-epidermal adhesion and barrier function. Co-immunoprecipitation studies demonstrated that kindlin-2 interacts with both integrin- and cadherin-based adhesions. In kindlin-2-deficient keratinocytes, reduced cell-cell adhesion was associated with abnormal cytoplasmic distribution of adherens junctions and desmosomal proteins, which was dependent on RhoA activation. Direct activation of RhoA with recombinant bacterial cytotoxic necrotizing factor y (CNFy) reverted the abnormal phenotype and barrier function of kindlin-2-deficient keratinocytes and skin equivalents. These findings have physiological and pathological significance, since kindlin-2 expression modulates the phenotype in Kindler syndrome, a skin fragility disorder caused by kindlin-1 deficiency. Our results suggest that pharmacological regulation of RhoGTPase activity may represent a therapeutic option for skin fragility.
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Affiliation(s)
- Yinghong He
- Department of Dermatology, Medical Centre-University of Freiburg, Germany
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24
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Rognoni E, Widmaier M, Jakobson M, Ruppert R, Ussar S, Katsougkri D, Böttcher RT, Lai-Cheong JE, Rifkin DB, McGrath JA, Fässler R. Kindlin-1 controls Wnt and TGF-β availability to regulate cutaneous stem cell proliferation. Nat Med 2014; 20:350-9. [PMID: 24681597 PMCID: PMC3982140 DOI: 10.1038/nm.3490] [Citation(s) in RCA: 95] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2013] [Accepted: 02/03/2014] [Indexed: 02/08/2023]
Abstract
Kindlin-1 is an integrin tail binding protein that controls integrin activation. Mutations in the FERMT-1 gene lead to Kindler Syndrome in man, which is characterized by skin blistering, premature skin ageing and skin cancer of unknown etiology. Here we show that loss of Kindlin-1 in mouse keratinocytes recapitulates Kindler Syndrome, and in addition produces enlarged and hyperactive stem cell compartments, which lead to hyperthickened epidermis, ectopic hair follicle development and increased skin tumor susceptibility. Mechanistically, Kindlin-1 controls keratinocyte adhesion through β1-class integrins and proliferation and differentiation of cutaneous epithelial stem cells by promoting αvβ6 integrin-mediated TGFβ activation and by inhibiting Wnt-β-catenin signaling through an integrin-independent regulation of Wnt ligand expression. Our findings assign Kindlin-1 the novel and essential task to control cutaneous epithelial stem cell homeostasis by balancing TGFβ mediated growth inhibitory and Wnt-β-catenin mediated growth-promoting signals.
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Affiliation(s)
- Emanuel Rognoni
- Department of Molecular Medicine, Max Planck Institute of Biochemistry, Martinsried, Germany
| | - Moritz Widmaier
- Department of Molecular Medicine, Max Planck Institute of Biochemistry, Martinsried, Germany
| | - Madis Jakobson
- Department of Molecular Medicine, Max Planck Institute of Biochemistry, Martinsried, Germany
| | - Raphael Ruppert
- Department of Molecular Medicine, Max Planck Institute of Biochemistry, Martinsried, Germany
| | - Siegfried Ussar
- Department of Molecular Medicine, Max Planck Institute of Biochemistry, Martinsried, Germany
| | - Despoina Katsougkri
- Department of Molecular Medicine, Max Planck Institute of Biochemistry, Martinsried, Germany
| | - Ralph T Böttcher
- Department of Molecular Medicine, Max Planck Institute of Biochemistry, Martinsried, Germany
| | - Joey E Lai-Cheong
- 1] Department of Dermatology, King Edward VII Hospital, Windsor, UK. [2] St. John's Institute of Dermatology, King's College London (Guy's Campus), London, UK
| | - Daniel B Rifkin
- New York University, Langone School of Medicine, New York, New York, USA
| | - John A McGrath
- St. John's Institute of Dermatology, King's College London (Guy's Campus), London, UK
| | - Reinhard Fässler
- Department of Molecular Medicine, Max Planck Institute of Biochemistry, Martinsried, Germany
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25
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Hopkinson SB, Hamill KJ, Wu Y, Eisenberg JL, Hiroyasu S, Jones JC. Focal Contact and Hemidesmosomal Proteins in Keratinocyte Migration and Wound Repair. Adv Wound Care (New Rochelle) 2014; 3:247-263. [PMID: 24669360 DOI: 10.1089/wound.2013.0489] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2013] [Accepted: 09/03/2013] [Indexed: 12/12/2022] Open
Abstract
Significance: During wound healing of the skin, keratinocytes should move over while still adhering to their underlying matrix. Thus, mechanistic insights into the wound-healing process require an understanding of the forms and functions of keratinocyte matrix adhesions, specifically focal contacts and hemidesmosomes, and their components. Recent Advances: Although the structure and composition of focal contacts and hemidesmosomes are relatively well defined, the functions of their components are only now being delineated using mouse genetic models and knockdown approaches in cell culture systems. Remarkably, both focal contact and hemidesmosomal proteins appear involved in determining the speed and directional migration of epidermal cells by modulating several signal transduction pathways. Critical Issues: Although many publications are centered on focal contacts, their existence in tissues such as the skin is controversial. Nonetheless, focal contact proteins are central to mechanisms that regulate skin cell motility. Conversely, hemidesmosomes have been identified in intact skin but whether hemidesmosomal components play a positive regulatory function in keratinocyte motility remains debated in the field. Future Directions: Defective wound healing is a developing problem in the aged, hospitalized and diabetic populations. Hence, deriving new insights into the molecular roles of matrix adhesion proteins in wound healing is a prerequisite to the development of novel therapeutics to enhance tissue repair and regeneration.
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Affiliation(s)
- Susan B. Hopkinson
- Department of Cell and Molecular Biology, Northwestern University Medical School, Chicago, Illinois
| | - Kevin J. Hamill
- Department of Cell and Molecular Biology, Northwestern University Medical School, Chicago, Illinois
| | - Yvonne Wu
- Department of Cell and Molecular Biology, Northwestern University Medical School, Chicago, Illinois
| | - Jessica L. Eisenberg
- Department of Cell and Molecular Biology, Northwestern University Medical School, Chicago, Illinois
| | - Sho Hiroyasu
- Department of Cell and Molecular Biology, Northwestern University Medical School, Chicago, Illinois
| | - Jonathan C.R. Jones
- Department of Cell and Molecular Biology, Northwestern University Medical School, Chicago, Illinois
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26
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Duperret EK, Ridky TW. Focal adhesion complex proteins in epidermis and squamous cell carcinoma. Cell Cycle 2013; 12:3272-85. [PMID: 24036537 DOI: 10.4161/cc.26385] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Focal adhesions (FAs) are large, integrin-containing, multi-protein assemblies spanning the plasma membrane that link the cellular cytoskeleton to surrounding extracellular matrix. They play critical roles in adhesion and cell signaling and are major regulators of epithelial homeostasis, tissue response to injury, and tumorigenesis. Most integrin subunits and their associated FA proteins are expressed in skin, and murine genetic models have provided insight into the functional roles of FAs in normal and neoplastic epidermis. Here, we discuss the roles of these proteins in normal epidermal proliferation, adhesion, wound healing, and cancer. While many downstream signaling mechanisms remain unclear, the critically important roles of FAs are highlighted by the development of therapeutics targeting FAs for human cancer.
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Kindlin-1 Mutant Zebrafish as an In Vivo Model System to Study Adhesion Mechanisms in the Epidermis. J Invest Dermatol 2013; 133:2180-90. [DOI: 10.1038/jid.2013.154] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2012] [Revised: 03/01/2013] [Accepted: 03/16/2013] [Indexed: 12/27/2022]
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28
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Disorders of the cutaneous basement membrane zone--the paradigm of epidermolysis bullosa. Matrix Biol 2013; 33:29-34. [PMID: 23917088 DOI: 10.1016/j.matbio.2013.07.007] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2013] [Revised: 07/01/2013] [Accepted: 07/01/2013] [Indexed: 12/19/2022]
Abstract
The cutaneous basement membrane zone (BMZ) is a highly specialized functional complex that provides the skin with structural adhesion and resistance to shearing forces. Its regulatory functions include control of epithelial-mesenchymal interactions under physiological and pathological conditions. Mutations in genes encoding components of the BMZ are associated with inherited skin disorders of the epidermolysis bullosa (EB) group, characterized by skin fragility, mechanically induced blisters and erosions of the skin and mucous membranes. Although most disease-associated genes are known, the genetic basis of new EB subtypes linked to mutations in genes for focal adhesion proteins was uncovered only recently. The molecular mechanisms leading to blistering, abnormal wound healing, predisposition to skin cancer, and other complications in EB have been elucidated using animal models and disease proteomics. The rapid progress in understanding the molecular basis of EB has enabled the development of strategies for biologically valid causal therapies.
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29
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Margadant C, Kreft M, Zambruno G, Sonnenberg A. Kindlin-1 regulates integrin dynamics and adhesion turnover. PLoS One 2013; 8:e65341. [PMID: 23776470 PMCID: PMC3679067 DOI: 10.1371/journal.pone.0065341] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2013] [Accepted: 04/25/2013] [Indexed: 01/08/2023] Open
Abstract
Loss-of-function mutations in the gene encoding the integrin co-activator kindlin-1 cause Kindler syndrome. We report a novel kindlin-1-deficient keratinocyte cell line derived from a Kindler syndrome patient. Despite the expression of kindlin-2, the patient’s cells display several hallmarks related to reduced function of β1 integrins, including abnormal cell morphology, cell adhesion, cell spreading, focal adhesion assembly, and cell migration. Defective cell adhesion was aggravated by kindlin-2 depletion, indicating that kindlin-2 can compensate to a certain extent for the loss of kindlin-1. Intriguingly, β1 at the cell-surface was aberrantly glycosylated in the patient’s cells, and its expression was considerably reduced, both in cells in vitro and in the patient’s epidermis. Reconstitution with wild-type kindlin-1 but not with a β1-binding defective mutant restored the aberrant β1 expression and glycosylation, and normalized cell morphology, adhesion, spreading, and migration. Furthermore, the expression of wild-type kindlin-1, but not of the integrin-binding-defective mutant, increased the stability of integrin-mediated cell-matrix adhesions and enhanced the redistribution of internalized integrins to the cell surface. Thus, these data uncover a role for kindlin-1 in the regulation of integrin trafficking and adhesion turnover.
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Affiliation(s)
- Coert Margadant
- Division of Cell Biology, The Netherlands Cancer Institute, Amsterdam, The Netherlands
| | - Maaike Kreft
- Division of Cell Biology, The Netherlands Cancer Institute, Amsterdam, The Netherlands
| | | | - Arnoud Sonnenberg
- Division of Cell Biology, The Netherlands Cancer Institute, Amsterdam, The Netherlands
- * E-mail:
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30
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'See-saw' expression of microRNA-198 and FSTL1 from a single transcript in wound healing. Nature 2013; 495:103-6. [PMID: 23395958 DOI: 10.1038/nature11890] [Citation(s) in RCA: 153] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2012] [Accepted: 01/03/2013] [Indexed: 12/12/2022]
Abstract
Post-transcriptional switches are flexible effectors of dynamic changes in gene expression. Here we report a new post-transcriptional switch that dictates the spatiotemporal and mutually exclusive expression of two alternative gene products from a single transcript. Expression of primate-specific exonic microRNA-198 (miR-198), located in the 3'-untranslated region of follistatin-like 1 (FSTL1) messenger RNA, switches to expression of the linked open reading frame of FSTL1 upon wounding in a human ex vivo organ culture system. We show that binding of a KH-type splicing regulatory protein (KSRP, also known as KHSRP) to the primary transcript determines the fate of the transcript and is essential for the processing of miR-198: transforming growth factor-β signalling switches off miR-198 expression by downregulating KSRP, and promotes FSTL1 protein expression. We also show that FSTL1 expression promotes keratinocyte migration, whereas miR-198 expression has the opposite effect by targeting and inhibiting DIAPH1, PLAU and LAMC2. A clear inverse correlation between the expression pattern of FSTL1 (pro-migratory) and miR-198 (anti-migratory) highlights the importance of this regulatory switch in controlling context-specific gene expression to orchestrate wound re-epithelialization. The deleterious effect of failure of this switch is apparent in non-healing chronic diabetic ulcers, in which expression of miR-198 persists, FSTL1 is absent, and keratinocyte migration, re-epithelialization and wound healing all fail to occur.
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31
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Patel H, Zich J, Serrels B, Rickman C, Hardwick KG, Frame MC, Brunton VG. Kindlin-1 regulates mitotic spindle formation by interacting with integrins and Plk-1. Nat Commun 2013; 4:2056. [PMID: 23804033 DOI: 10.1038/ncomms3056] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2012] [Accepted: 05/24/2013] [Indexed: 11/08/2022] Open
Abstract
Kindlin-1 binds to integrins and regulates integrin activation at cell adhesions. Here we report a new function of Kindlin-1 in regulating spindle assembly. We show that Kindlin-1 localizes to centrosomes, its concentration peaking during G2/M, where it associates with various pericentriolar material proteins, including Polo-like kinase 1. Short interfering RNA-mediated depletion of Kindlin-1 increases formation of abnormal mitotic spindles and decreases cellular survival. This effect is dependent not only on the ability of Kindlin-1 to bind integrins but also on Polo-like kinase 1-mediated Kindlin-1 phosphorylation. We demonstrate that a subcellular pool of phosphorylated Kindlin-1 is located exclusively at centrosomes. Our work identifies a novel cellular role for Kindlin-1 in ensuring mitotic spindle assembly and cellular survival that is controlled by phosphorylation via Polo-like kinase 1.
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Affiliation(s)
- Hitesh Patel
- Edinburgh Cancer Research UK Centre, Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh EH4 2XR, UK
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32
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Assembly and disassembly of cell matrix adhesions. Curr Opin Cell Biol 2012; 24:569-81. [DOI: 10.1016/j.ceb.2012.06.010] [Citation(s) in RCA: 160] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2012] [Revised: 06/12/2012] [Accepted: 06/28/2012] [Indexed: 11/22/2022]
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33
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Bandyopadhyay A, Rothschild G, Kim S, Calderwood DA, Raghavan S. Functional differences between kindlin-1 and kindlin-2 in keratinocytes. J Cell Sci 2012; 125:2172-84. [PMID: 22328497 DOI: 10.1242/jcs.096214] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Integrin-β1-null keratinocytes can adhere to fibronectin through integrin αvβ6, but form large peripheral focal adhesions and exhibit defective cell spreading. Here we report that, in addition to the reduced avidity of αvβ6 integrin binding to fibronectin, the inability of integrin β6 to efficiently bind and recruit kindlin-2 to focal adhesions directly contributes to these phenotypes. Kindlins regulate integrins through direct interactions with the integrin-β cytoplasmic tail and keratinocytes express kindlin-1 and kindlin-2. Notably, although both kindlins localize to focal adhesions in wild-type cells, only kindlin-1 localizes to the integrin-β6-rich adhesions of integrin-β1-null cells. Rescue of these cells with wild-type and chimeric integrin constructs revealed a correlation between kindlin-2 recruitment and cell spreading. Furthermore, despite the presence of kindlin-1, knockdown of kindlin-2 in wild-type keratinocytes impaired cell spreading. Our data reveal unexpected functional consequences of differences in the association of two homologous kindlin isoforms with two closely related integrins, and suggest that despite their similarities, different kindlins are likely to have unique functions.
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Affiliation(s)
- Aditi Bandyopadhyay
- College of Dental Medicine and Department of Dermatology, Columbia University, New York, NY 10032, USA
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Qu H, Wen T, Pesch M, Aumailley M. Partial loss of epithelial phenotype in kindlin-1-deficient keratinocytes. THE AMERICAN JOURNAL OF PATHOLOGY 2012; 180:1581-92. [PMID: 22326752 DOI: 10.1016/j.ajpath.2012.01.005] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2011] [Revised: 11/25/2011] [Accepted: 01/03/2012] [Indexed: 01/11/2023]
Abstract
Kindlin-1 is an adaptor protein that is expressed by most epithelial cells and has been implicated in integrin bidirectional signaling. Mutations in the gene encoding kindlin-1 are associated with Kindler syndrome, a recessively inherited disorder that is characterized by fragile skin. Functionally, a loss of kindlin-1 impairs the adhesion of basal keratinocytes to the extracellular matrix both in vivo and in vitro. In this study, we show that the phenotype of mutant keratinocytes deficient in kindlin-1 is characterized by the modification of the cortical actin network and increased plasticity of the plasma membrane. At the molecular level, expression of several proteins associated with an epithelial phenotype, such as α6β4 integrin, collagen XVII, E-cadherin, and desmoglein-3, is strongly reduced, whereas, surprisingly, laminin 332 is synthesized in larger amounts than in control keratinocytes. In contrast, mesenchymal markers such as vimentin and fibronectin are increased in keratinocytes lacking kindlin-1. The switch in cell plasticity and protein expression was confirmed by siRNA-mediated down-regulation of kindlin-1 in HaCaT epithelial cells. Furthermore, there was up-regulation of matrix metalloproteinases and pro-inflammatory cytokines in kindlin-1-deficient keratinocytes. These results provide new insights into the pathogenic mechanisms that take place in Kindler syndrome. Moreover, the constellation of molecular defects associated with the loss of kindlin-1 may explain the higher incidence of skin cancer observed in patients affected with this disorder.
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Affiliation(s)
- Haiyan Qu
- Center for Biochemistry, Medical Faculty, University of Cologne, Cologne, Germany
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35
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Has C, Castiglia D, del Rio M, Diez MG, Piccinni E, Kiritsi D, Kohlhase J, Itin P, Martin L, Fischer J, Zambruno G, Bruckner-Tuderman L. Kindler syndrome: extension of FERMT1 mutational spectrum and natural history. Hum Mutat 2011; 32:1204-12. [PMID: 21936020 DOI: 10.1002/humu.21576] [Citation(s) in RCA: 83] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2011] [Accepted: 06/29/2011] [Indexed: 11/08/2022]
Abstract
Mutations in the FERMT1 gene (also known as KIND1), encoding the focal adhesion protein kindlin-1, underlie the Kindler syndrome (KS), an autosomal recessive skin disorder with an intriguing progressive phenotype comprising skin blistering, photosensitivity, progressive poikiloderma with extensive skin atrophy, and propensity to skin cancer. Herein we review the clinical and genetic data of 62 patients, and delineate the natural history of the disorder, for example, age at onset of symptoms, or risk of malignancy. Although most mutations are predicted to lead to premature termination of translation, and to loss of kindlin-1 function, significant clinical variability is observed among patients. There is an association of FERMT1 missense and in-frame deletion mutations with milder disease phenotypes, and later onset of complications. Nevertheless, the clinical variability is not fully explained by genotype-phenotype correlations. Environmental factors and yet unidentified modifiers may play a role. Better understanding of the molecular pathogenesis of KS should enable the development of prevention strategies for disease complications.
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Affiliation(s)
- Cristina Has
- Department of Dermatology, University Medical Center Freiburg, Freiburg, Germany
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36
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Deconstructing the skin: cytoarchitectural determinants of epidermal morphogenesis. Nat Rev Mol Cell Biol 2011; 12:565-80. [PMID: 21860392 DOI: 10.1038/nrm3175] [Citation(s) in RCA: 318] [Impact Index Per Article: 24.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
To provide a stable environmental barrier, the epidermis requires an integrated network of cytoskeletal elements and cellular junctions. Nevertheless, the epidermis ranks among the body's most dynamic tissues, continually regenerating itself and responding to cutaneous insults. As keratinocytes journey from the basal compartment towards the cornified layers, they completely reorganize their adhesive junctions and cytoskeleton. These architectural components are more than just rivets and scaffolds - they are active participants in epidermal morphogenesis that regulate epidermal polarization, signalling and barrier formation.
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