1
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Mariadoss AVA, Wang CZ. Exploring the Cellular and Molecular Mechanism of Discoidin Domain Receptors (DDR1 and DDR2) in Bone Formation, Regeneration, and Its Associated Disease Conditions. Int J Mol Sci 2023; 24:14895. [PMID: 37834343 PMCID: PMC10573612 DOI: 10.3390/ijms241914895] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2023] [Revised: 10/01/2023] [Accepted: 10/02/2023] [Indexed: 10/15/2023] Open
Abstract
The tyrosine kinase family receptor of discoidin domain receptors (DDR1 and DDR2) is known to be activated by extracellular matrix collagen catalytic binding protein receptors. They play a remarkable role in cell proliferation, differentiation, migration, and cell survival. DDR1 of the DDR family regulates matrix-metalloproteinase, which causes extracellular matrix (ECM) remodeling and reconstruction during unbalanced homeostasis. Collagenous-rich DDR1 triggers the ECM of cartilage to regenerate the cartilage tissue in osteoarthritis (OA) and temporomandibular disorder (TMD). Moreover, DDR2 is prominently present in the fibroblasts, smooth muscle cells, myofibroblasts, and chondrocytes. It is crucial in generating and breaking collagen vital cellular activities like proliferation, differentiation, and adhesion mechanisms. However, the deficiency of DDR1 rather than DDR2 was detrimental in cases of OA and TMDs. DDR1 stimulated the ECM cartilage and improved bone regeneration. Based on the above information, we made an effort to outline the advancement of the utmost promising DDR1 and DDR2 regulation in bone and cartilage, also summarizing their structural, biological activity, and selectivity.
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Affiliation(s)
| | - Chau-Zen Wang
- Orthopaedic Research Center, Kaohsiung Medical University, Kaohsiung 80708, Taiwan;
- Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung 80708, Taiwan
- Regeneration Medicine and Cell Therapy Research Center, Kaohsiung Medical University, Kaohsiung 80708, Taiwan
- Department of Physiology, College of Medicine, Kaohsiung Medical University, Kaohsiung 80708, Taiwan
- Department of Medical Research, Kaohsiung Medical University Hospital, Kaohsiung 80708, Taiwan
- College of Professional Studies, National Pingtung University of Science and Technology, Pingtung 912301, Taiwan
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2
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Prasad Shenoy G, Pal R, Gurubasavaraja Swamy P, Singh E, Manjunathaiah Raghavendra N, Sanjay Dhiwar P. Discoidin Domain Receptor Inhibitors as Anticancer Agents: A Systematic Review on Recent Development of DDRs Inhibitors, their Resistance and Structure Activity Relationship. Bioorg Chem 2022; 130:106215. [DOI: 10.1016/j.bioorg.2022.106215] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2022] [Revised: 10/12/2022] [Accepted: 10/15/2022] [Indexed: 11/02/2022]
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3
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Rauner G, Kuperwasser C. Microenvironmental control of cell fate decisions in mammary gland development and cancer. Dev Cell 2021; 56:1875-1883. [PMID: 34256927 DOI: 10.1016/j.devcel.2021.06.016] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2021] [Revised: 06/17/2021] [Accepted: 06/17/2021] [Indexed: 12/28/2022]
Abstract
Cell fate decisions are critical for adequate tissue development, maintenance and regeneration. In the mammary gland, epithelial cell fates are tightly controlled by the microenvironment. Here, we review how cell fate decisions are regulated by components of the microenvironment during mammary gland development and how pathological changes in the microenvironment can alter cell fates, leading to malignancy. Specifically, we describe the current understanding of how mammary cell fate is controlled and directed by three elements: the extracellular matrix, the immune microenvironment, and hormones-and how these elements can converge to create microenvironments that promote a fourth element: DNA damage.
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Affiliation(s)
- Gat Rauner
- Department of Developmental, Molecular and Chemical Biology, Tufts University School of Medicine, Boston, MA 02111, USA
| | - Charlotte Kuperwasser
- Department of Developmental, Molecular and Chemical Biology, Tufts University School of Medicine, Boston, MA 02111, USA; Laboratory for the Convergence of Biomedical, Physical, and Engineering Sciences, Tufts University School of Medicine, Boston, MA 02111, USA.
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4
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Elkamhawy A, Lu Q, Nada H, Woo J, Quan G, Lee K. The Journey of DDR1 and DDR2 Kinase Inhibitors as Rising Stars in the Fight Against Cancer. Int J Mol Sci 2021; 22:ijms22126535. [PMID: 34207360 PMCID: PMC8235339 DOI: 10.3390/ijms22126535] [Citation(s) in RCA: 46] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2021] [Revised: 06/07/2021] [Accepted: 06/13/2021] [Indexed: 12/12/2022] Open
Abstract
Discoidin domain receptor (DDR) is a collagen-activated receptor tyrosine kinase that plays critical roles in regulating essential cellular processes such as morphogenesis, differentiation, proliferation, adhesion, migration, invasion, and matrix remodeling. As a result, DDR dysregulation has been attributed to a variety of human cancer disorders, for instance, non-small-cell lung carcinoma (NSCLC), ovarian cancer, glioblastoma, and breast cancer, in addition to some inflammatory and neurodegenerative disorders. Since the target identification in the early 1990s to date, a lot of efforts have been devoted to the development of DDR inhibitors. From a medicinal chemistry perspective, we attempted to reveal the progress in the development of the most promising DDR1 and DDR2 small molecule inhibitors covering their design approaches, structure-activity relationship (SAR), biological activity, and selectivity.
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Affiliation(s)
- Ahmed Elkamhawy
- College of Pharmacy, Dongguk University-Seoul, Goyang 10326, Korea or (A.E.); (Q.L.); (H.N.); (J.W.); (G.Q.)
- Department of Pharmaceutical Organic Chemistry, Faculty of Pharmacy, Mansoura University, Mansoura 35516, Egypt
| | - Qili Lu
- College of Pharmacy, Dongguk University-Seoul, Goyang 10326, Korea or (A.E.); (Q.L.); (H.N.); (J.W.); (G.Q.)
| | - Hossam Nada
- College of Pharmacy, Dongguk University-Seoul, Goyang 10326, Korea or (A.E.); (Q.L.); (H.N.); (J.W.); (G.Q.)
| | - Jiyu Woo
- College of Pharmacy, Dongguk University-Seoul, Goyang 10326, Korea or (A.E.); (Q.L.); (H.N.); (J.W.); (G.Q.)
| | - Guofeng Quan
- College of Pharmacy, Dongguk University-Seoul, Goyang 10326, Korea or (A.E.); (Q.L.); (H.N.); (J.W.); (G.Q.)
| | - Kyeong Lee
- College of Pharmacy, Dongguk University-Seoul, Goyang 10326, Korea or (A.E.); (Q.L.); (H.N.); (J.W.); (G.Q.)
- Correspondence:
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5
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Laminin-dependent integrin β1 signaling regulates milk protein synthesis via prolactin/STAT5 pathway in bovine mammary epithelial cells. Biochem Biophys Res Commun 2020; 524:288-294. [DOI: 10.1016/j.bbrc.2020.01.086] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2019] [Accepted: 01/14/2020] [Indexed: 11/22/2022]
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6
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Parri E, Kuusanmäki H, van Adrichem AJ, Kaustio M, Wennerberg K. Identification of novel regulators of STAT3 activity. PLoS One 2020; 15:e0230819. [PMID: 32231398 PMCID: PMC7108870 DOI: 10.1371/journal.pone.0230819] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2019] [Accepted: 03/09/2020] [Indexed: 01/05/2023] Open
Abstract
STAT3 mediates signalling downstream of cytokine and growth factor receptors where it acts as a transcription factor for its target genes, including oncogenes and cell survival regulating genes. STAT3 has been found to be persistently activated in many types of cancers, primarily through its tyrosine phosphorylation (Y705). Here, we show that constitutive STAT3 activation protects cells from cytotoxic drug responses of several drug classes. To find novel and potentially targetable STAT3 regulators we performed a kinase and phosphatase siRNA screen with cells expressing either a hyperactive STAT3 mutant or IL6-induced wild type STAT3. The screen identified cell division cycle 7-related protein kinase (CDC7), casein kinase 2, alpha 1 (CSNK2), discoidin domain-containing receptor 2 (DDR2), cyclin-dependent kinase 8 (CDK8), phosphatidylinositol 4-kinase 2-alpha (PI4KII), C-terminal Src kinase (CSK) and receptor-type tyrosine-protein phosphatase H (PTPRH) as potential STAT3 regulators. Using small molecule inhibitors targeting these proteins, we confirmed dose and time dependent inhibition of STAT3-mediated transcription, suggesting that inhibition of these kinases may provide strategies for dampening STAT3 activity in cancers.
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Affiliation(s)
- Elina Parri
- Institute for Molecular Medicine Finland, University of Helsinki, Helsinki, Finland
| | - Heikki Kuusanmäki
- Institute for Molecular Medicine Finland, University of Helsinki, Helsinki, Finland
- Biotech Research & Innovation Centre (BRIC) and Novo Nordisk Foundation Center for Stem Cell Biology (DanStem), University of Copenhagen, Copenhagen, Denmark
| | | | - Meri Kaustio
- Institute for Molecular Medicine Finland, University of Helsinki, Helsinki, Finland
| | - Krister Wennerberg
- Institute for Molecular Medicine Finland, University of Helsinki, Helsinki, Finland
- Biotech Research & Innovation Centre (BRIC) and Novo Nordisk Foundation Center for Stem Cell Biology (DanStem), University of Copenhagen, Copenhagen, Denmark
- * E-mail:
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7
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Wang B, Shi L, Men J, Li Q, Hou X, Wang C, Zhao F. Controlled synchronization of prolactin/STAT5 and AKT1/mTOR in bovine mammary epithelial cells. In Vitro Cell Dev Biol Anim 2020; 56:243-252. [DOI: 10.1007/s11626-020-00432-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2019] [Accepted: 01/27/2020] [Indexed: 01/01/2023]
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8
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Oliveira HR, Lourenco DAL, Masuda Y, Misztal I, Tsuruta S, Jamrozik J, Brito LF, Silva FF, Cant JP, Schenkel FS. Single-step genome-wide association for longitudinal traits of Canadian Ayrshire, Holstein, and Jersey dairy cattle. J Dairy Sci 2019; 102:9995-10011. [PMID: 31477296 DOI: 10.3168/jds.2019-16821] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2019] [Accepted: 07/08/2019] [Indexed: 11/19/2022]
Abstract
Estimating single nucleotide polymorphism (SNP) effects over time is essential to identify and validate candidate genes (or quantitative trait loci) associated with time-dependent variation of economically important traits and to better understand the underlying mechanisms of lactation biology. Therefore, in this study, we aimed to estimate time-dependent effects of SNP and identifying candidate genes associated with milk (MY), fat (FY), and protein (PY) yields, and somatic cell score (SCS) in the first 3 lactations of Canadian Ayrshire, Holstein, and Jersey breeds, as well as suggest their potential pattern of phenotypic effect over time. Random regression coefficients for the additive direct genetic effect were estimated for each animal using single-step genomic BLUP, based on 2 random regression models: one considering MY, FY, and PY in the first 3 lactations and the other considering SCS in the first 3 lactations. Thereafter, SNP solutions were obtained for random regression coefficients, which were used to estimate the SNP effects over time (from 5 to 305 d in lactation). The top 1% of SNP that showed a high magnitude of SNP effect in at least 1 d in lactation were selected as relevant SNP for further analyses of candidate genes, and clustered according to the trajectory of their SNP effects over time. The majority of SNP selected for MY, FY, and PY increased the magnitude of their effects over time, for all breeds. In contrast, for SCS, most selected SNP decreased the magnitude of their effects over time, especially for the Holstein and Jersey breeds. In general, we identified a different set of candidate genes for each breed, and similar genes were found across different lactations for the same trait in the same breed. For some of the candidate genes, the suggested pattern of phenotypic effect changed among lactations. Among the lactations, candidate genes (and their suggested phenotypic effect over time) identified for the second and third lactations were more similar to each other than for the first lactation. Well-known candidate genes with major effects on milk production traits presented different suggested patterns of phenotypic effect across breeds, traits, and lactations in which they were identified. The candidate genes identified in this study can be used as target genes in studies of gene expression.
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Affiliation(s)
- H R Oliveira
- Department of Animal Biosciences, University of Guelph, Guelph, ON, N1G 2W1, Canada; Department of Animal Sciences, Universidade Federal de Viçosa, Viçosa, Minas Gerais, 36570-000, Brazil.
| | - D A L Lourenco
- Department of Animal and Dairy Science, University of Georgia, Athens 30602
| | - Y Masuda
- Department of Animal and Dairy Science, University of Georgia, Athens 30602
| | - I Misztal
- Department of Animal and Dairy Science, University of Georgia, Athens 30602
| | - S Tsuruta
- Department of Animal and Dairy Science, University of Georgia, Athens 30602
| | - J Jamrozik
- Department of Animal Biosciences, University of Guelph, Guelph, ON, N1G 2W1, Canada; Canadian Dairy Network, Guelph, ON, N1K 1E5, Canada
| | - L F Brito
- Department of Animal Biosciences, University of Guelph, Guelph, ON, N1G 2W1, Canada; Department of Animal Sciences, Purdue University, West Lafayette, IN 47907
| | - F F Silva
- Department of Animal Sciences, Universidade Federal de Viçosa, Viçosa, Minas Gerais, 36570-000, Brazil
| | - J P Cant
- Department of Animal Biosciences, University of Guelph, Guelph, ON, N1G 2W1, Canada
| | - F S Schenkel
- Department of Animal Biosciences, University of Guelph, Guelph, ON, N1G 2W1, Canada
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9
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KIBRA Team Up with Partners to Promote Breast Cancer Metastasis. Pathol Oncol Res 2019; 26:627-634. [DOI: 10.1007/s12253-019-00660-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/11/2019] [Accepted: 04/01/2019] [Indexed: 02/06/2023]
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10
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Søgaard PP, Ito N, Sato N, Fujita Y, Matter K, Itoh Y. Epithelial polarization in 3D matrix requires DDR1 signaling to regulate actomyosin contractility. Life Sci Alliance 2019; 2:2/1/e201800276. [PMID: 30760555 PMCID: PMC6374992 DOI: 10.26508/lsa.201800276] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2018] [Revised: 02/07/2019] [Accepted: 02/08/2019] [Indexed: 01/19/2023] Open
Abstract
For epithelial cells to establish epithelial polarity in a 3D matrix, signaling of a collagen receptor tyrosine kinase, DDR1, plays a crucial role. DDR1 signaling controls actomyosin contractility at the cell–cell junction through suppression of ROCK activity. Epithelial cells form sheets and tubules in various epithelial organs and establish apicobasal polarity and asymmetric vesicle transport to provide functionality in these structures. However, the molecular mechanisms that allow epithelial cells to establish polarity are not clearly understood. Here, we present evidence that the kinase activity of the receptor tyrosine kinase for collagen, discoidin domain receptor 1 (DDR1), is required for efficient establishment of epithelial polarity, proper asymmetric protein secretion, and execution of morphogenic programs. Lack of DDR1 protein or inhibition of DDR1 kinase activity disturbed tubulogenesis, cystogenesis, and the establishment of epithelial polarity and caused defects in the polarized localization of membrane-type 1 matrix metalloproteinase (MT1-MMP), GP135, primary cilia, laminin, and the Golgi apparatus. Disturbed epithelial polarity and cystogenesis upon DDR1 inhibition was caused by excess ROCK (rho-associated, coiled-coil-containing protein kinase)-driven actomyosin contractility, and pharmacological inhibition of ROCK was sufficient to correct these defects. Our data indicate that a DDR1-ROCK signaling axis is essential for the efficient establishment of epithelial polarity.
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Affiliation(s)
| | - Noriko Ito
- Kennedy Institute of Rheumatology, University of Oxford, Oxford, UK
| | - Nanami Sato
- Institute for Genetic Medicine, Division of Molecular Oncology, Hokkaido University, Sapporo, Japan
| | - Yasuyuki Fujita
- Institute for Genetic Medicine, Division of Molecular Oncology, Hokkaido University, Sapporo, Japan
| | - Karl Matter
- UCL Institute of Ophthalmology, University College London, London, UK
| | - Yoshifumi Itoh
- Kennedy Institute of Rheumatology, University of Oxford, Oxford, UK
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11
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Jiao B, Zhang X, Wang S, Wang L, Luo Z, Zhao H, Khatib H, Wang X. MicroRNA-221 regulates proliferation of bovine mammary gland epithelial cells by targeting the STAT5a and IRS1 genes. J Dairy Sci 2019; 102:426-435. [DOI: 10.3168/jds.2018-15108] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2018] [Accepted: 08/24/2018] [Indexed: 01/29/2023]
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12
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Sisto M, Lorusso L, Ingravallo G, Lisi S. Exocrine Gland Morphogenesis: Insights into the Role of Amphiregulin from Development to Disease. Arch Immunol Ther Exp (Warsz) 2017; 65:477-499. [DOI: 10.1007/s00005-017-0478-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2016] [Accepted: 06/02/2017] [Indexed: 12/12/2022]
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13
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Extracellular matrix component signaling in cancer. Adv Drug Deliv Rev 2016; 97:28-40. [PMID: 26519775 DOI: 10.1016/j.addr.2015.10.013] [Citation(s) in RCA: 124] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2015] [Revised: 10/19/2015] [Accepted: 10/20/2015] [Indexed: 12/12/2022]
Abstract
Cell responses to the extracellular matrix depend on specific signaling events. These are important from early development, through differentiation and tissue homeostasis, immune surveillance, and disease pathogenesis. Signaling not only regulates cell adhesion cytoskeletal organization and motility but also provides survival and proliferation cues. The major classes of cell surface receptors for matrix macromolecules are the integrins, discoidin domain receptors, and transmembrane proteoglycans such as syndecans and CD44. Cells respond not only to specific ligands, such as collagen, fibronectin, or basement membrane glycoproteins, but also in terms of matrix rigidity. This can regulate the release and subsequent biological activity of matrix-bound growth factors, for example, transforming growth factor-β. In the environment of tumors, there may be changes in cell populations and their receptor profiles as well as matrix constitution and protein cross-linking. Here we summarize roles of the three major matrix receptor types, with emphasis on how they function in tumor progression.
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14
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Toy KA, Valiathan RR, Núñez F, Kidwell KM, Gonzalez ME, Fridman R, Kleer CG. Tyrosine kinase discoidin domain receptors DDR1 and DDR2 are coordinately deregulated in triple-negative breast cancer. Breast Cancer Res Treat 2015; 150:9-18. [PMID: 25667101 DOI: 10.1007/s10549-015-3285-7] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2015] [Accepted: 01/24/2015] [Indexed: 01/16/2023]
Abstract
Receptor kinases Discoidin Domain Receptors (DDRs) 1 and 2 are emerging as new therapeutic targets in breast cancer (BC). However, the expression of DDR proteins during BC progression and their association with BC subtypes remain poorly defined. Herein we report the first comprehensive immunohistochemical analyses of DDR protein expression in a wide range of breast tissues. DDR1 and DDR2 expression was investigated by immunohistochemistry in 218 samples of normal breast (n = 10), ductal carcinoma in situ (DCIS, n = 10), and invasive carcinomas (n = 198), arrayed in tissue microarrays with comprehensive clinical and follow-up information. Staining was evaluated for cell type, subcellular localization, percentage and intensity (scores 1-4), and association with disease subtype and outcome. In normal epithelium and DCIS, DDR1 was highly expressed, while DDR2 was negative in normal epithelium, and in DCIS it localized to cells at the epithelial-stromal interface. Of the 198 invasive carcinomas, DDR1 was high in 87 (44 %) and low in 103 (52 %), and DDR2 was high in 110 (56 %) and low in 87 (44 %). High DDR2 was associated with high tumor grade (P = 0.002), triple-negative subtype (TNBC) (P < 0.0001), and worse survival (P = 0.037). We discovered a novel concordant deregulation of DDR expression, with a DDR1(Low)/DDR2(High) profile significantly associated with TNBC, compared to luminal tumors (P = 0.012), and with worse overall survival. In conclusion, DDR2 upregulation occurs in DCIS, before stromal invasion, and may reflect epithelial-stromal cross-talk. A DDR1(Low)/DDR2(High) protein profile is associated with TNBC and may identify invasive carcinomas with worse prognosis.
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Affiliation(s)
- Kathy A Toy
- Department of Pathology and Comprehensive Cancer Center, University of Michigan, 4217 Comprehensive Cancer Center, 1500 E. Medical Center Drive, Ann Arbor, MI, 48109, USA
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15
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Li Y, Lu X, Ren X, Ding K. Small Molecule Discoidin Domain Receptor Kinase Inhibitors and Potential Medical Applications. J Med Chem 2015; 58:3287-301. [DOI: 10.1021/jm5012319] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yupeng Li
- State Key Laboratory
of Respiratory Diseases, Guangzhou Institutes of Biomedicine and Health,
Chinese Academy of Sciences, No. 190
Kaiyuan Avenue, Guangzhou 510530, China
- University of Chinese Academy of Sciences, No. 19 Yuquan Road, Beijing 100049, China
| | - Xiaoyun Lu
- State Key Laboratory
of Respiratory Diseases, Guangzhou Institutes of Biomedicine and Health,
Chinese Academy of Sciences, No. 190
Kaiyuan Avenue, Guangzhou 510530, China
| | - Xiaomei Ren
- State Key Laboratory
of Respiratory Diseases, Guangzhou Institutes of Biomedicine and Health,
Chinese Academy of Sciences, No. 190
Kaiyuan Avenue, Guangzhou 510530, China
| | - Ke Ding
- State Key Laboratory
of Respiratory Diseases, Guangzhou Institutes of Biomedicine and Health,
Chinese Academy of Sciences, No. 190
Kaiyuan Avenue, Guangzhou 510530, China
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16
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Leitinger B. Discoidin domain receptor functions in physiological and pathological conditions. INTERNATIONAL REVIEW OF CELL AND MOLECULAR BIOLOGY 2014; 310:39-87. [PMID: 24725424 DOI: 10.1016/b978-0-12-800180-6.00002-5] [Citation(s) in RCA: 243] [Impact Index Per Article: 24.3] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The discoidin domain receptors, DDR1 and DDR2, are nonintegrin collagen receptors that are members of the receptor tyrosine kinase family. Both DDRs bind a number of different collagen types and play important roles in embryo development. Dysregulated DDR function is associated with progression of various human diseases, including fibrosis, arthritis, and cancer. By interacting with key components of the extracellular matrix and displaying distinct activation kinetics, the DDRs form a unique subfamily of receptor tyrosine kinases. DDR-facilitated cellular functions include cell migration, cell survival, proliferation, and differentiation, as well as remodeling of extracellular matrices. This review summarizes the current knowledge of DDR-ligand interactions, DDR-initiated signal pathways and the molecular mechanisms that regulate receptor function. Also discussed are the roles of DDRs in development and disease progression.
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Affiliation(s)
- Birgit Leitinger
- National Heart and Lung Institute, Imperial College London, London, United Kingdom.
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17
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Iwai LK, Luczynski MT, Huang PH. Discoidin domain receptors: a proteomic portrait. Cell Mol Life Sci 2014; 71:3269-79. [PMID: 24705941 PMCID: PMC11113481 DOI: 10.1007/s00018-014-1616-1] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2014] [Revised: 03/18/2014] [Accepted: 03/20/2014] [Indexed: 12/19/2022]
Abstract
The discoidin domain receptors (DDRs) are collagen-binding receptor tyrosine kinases that have been implicated in a number of fundamental biological processes ranging from growth and development to immunoregulation. In this review, we examine how recent proteomic technologies have enriched our understanding of DDR signaling mechanisms. We provide an overview on the use of large-scale proteomic profiling and chemical proteomics to reveal novel insights into DDR therapeutics, signaling networks, and receptor crosstalk. A perspective of how proteomics may be harnessed to answer outstanding fundamental questions including the dynamic regulation of receptor activation kinetics is presented. Collectively, these studies present an emerging molecular portrait of these unique receptors and their functional role in health and disease.
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Affiliation(s)
- Leo K. Iwai
- Protein Networks Team, Division of Cancer Biology, Institute of Cancer Research, 237 Fulham Road, London, SW3 6JB UK
- Present Address: Laboratório Especial de Toxinologia Aplicada/CeTICS, Instituto Butantan, Av Vital Brasil 1500, São Paulo, 05503-000 Brazil
| | - Maciej T. Luczynski
- Protein Networks Team, Division of Cancer Biology, Institute of Cancer Research, 237 Fulham Road, London, SW3 6JB UK
| | - Paul H. Huang
- Protein Networks Team, Division of Cancer Biology, Institute of Cancer Research, 237 Fulham Road, London, SW3 6JB UK
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18
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Abstract
Malignant gliomas are characterized by a diffuse infiltration into the surrounding brain parenchyma. Infiltrating glioma cells exist in close proximity with components of the tumor microenvironment, including the extracellular matrix (ECM). Whereas levels of collagens in the normal adult brain are low, in glioma, collagen levels are elevated and play a vital role in driving tumor progression. This article provides a comprehensive overview of the nature of collagens found in gliomas and offers unique insight into the mechanisms by which cancer cells interact with this ECM via cellular factors such as integrins, discoidin domain receptors, and mannose receptors. Also discussed are the major remodeling pathways of brain tumor collagen, mediated primarily by matrix metalloproteinases, and the reciprocal relationship between these enzymes and the collagen receptors. Finally, a concluding perspective is offered on how the biophysical properties of the collagen ECM, in particular, mechanical stiffness and compliance, influence malignant outcome. A better understanding of the complex molecular interactions between glioma cells and the collagen ECM will provide new avenues to combat the rampant tumor progression and chemoresistance in brain cancer patients.
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Affiliation(s)
- Leo S Payne
- Division of Cancer Biology, Institute of Cancer Research, 237 Fulham Road, London SW3 6JB, United Kingdom.
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19
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Valiathan RR, Marco M, Leitinger B, Kleer CG, Fridman R. Discoidin domain receptor tyrosine kinases: new players in cancer progression. Cancer Metastasis Rev 2012; 31:295-321. [PMID: 22366781 DOI: 10.1007/s10555-012-9346-z] [Citation(s) in RCA: 281] [Impact Index Per Article: 23.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Almost all human cancers display dysregulated expression and/or function of one or more receptor tyrosine kinases (RTKs). The strong causative association between altered RTK function and cancer progression has been translated into novel therapeutic strategies that target these cell surface receptors in cancer. Yet, the full spectrum of RTKs that may alter the oncogenic process is not completely understood. Accumulating evidence suggests that a unique set of RTKs known as the discoidin domain receptors (DDRs) play a key role in cancer progression by regulating the interactions of tumor cells with their surrounding collagen matrix. The DDRs are the only RTKs that specifically bind to and are activated by collagen. DDRs control cell and tissue homeostasis by acting as collagen sensors, transducing signals that regulate cell polarity, tissue morphogenesis, and cell differentiation. In cancer, DDRs are hijacked by tumor cells to disrupt normal cell-matrix communication and initiate pro-migratory and pro-invasive programs. Importantly, several cancer types exhibit DDR mutations, which are thought to alter receptor function and contribute to cancer progression. Other evidence suggests that the actions of DDRs in cancer are complex, either promoting or suppressing tumor cell behavior in a DDR type/isoform specific- and context-dependent manner. Thus, there is still a considerable gap in our knowledge of DDR actions in cancer tissues. This review summarizes and discusses the current knowledge on DDR expression and function in cancer. It is hoped that this effort will encourage more research into these poorly understood but unique RTKs, which have the potential of becoming novel therapeutic targets in cancer.
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Affiliation(s)
- Rajeshwari R Valiathan
- Department of Pathology, Wayne State University School of Medicine, Detroit, MI 48201, USA
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Lemeer S, Bluwstein A, Wu Z, Leberfinger J, Müller K, Kramer K, Kuster B. Phosphotyrosine mediated protein interactions of the discoidin domain receptor 1. J Proteomics 2011; 75:3465-77. [PMID: 22057045 DOI: 10.1016/j.jprot.2011.10.007] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2011] [Revised: 09/30/2011] [Accepted: 10/06/2011] [Indexed: 11/24/2022]
Abstract
The receptor tyrosine kinase DDR1 has been implicated in multiple human cancers and fibrosis and is targeted by the leukemia drug Gleevec. This suggests that DDR1 might be a new therapeutic target. However, further insight into the DDR1 signaling pathway is required in order to support its further development. Here, we investigated DDR1 proximal signaling by the analysis of protein-protein interactions using proteomic approaches. All known interactors of DDR1 were identified and localized to specific phosphotyrosine residues on the receptor. In addition, we identified numerous signaling proteins as new putative phosphotyrosine mediated interactors including RasGAP, SHIP1, SHIP2, STATs, PI3K and the SRC family kinases. Most of the new proteins contain SH2 and PTB domains and for all interactors we could directly point the site of interaction to specific phosphotyrosine residues on the receptor. The identified proteins have roles in the early steps of the signaling cascade, propagating the signal from the DDR1 receptor into the cell. The map of phosphotyrosine mediated interactors of DDR1 created in this study will serve as a starting point for functional investigations which will enhance our knowledge on the role of the DDR1 receptor in health and disease. This article is part of a Special Section entitled: Understanding genome regulation and genetic diversity by mass spectrometry.
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Affiliation(s)
- Simone Lemeer
- Chair of Proteomics and Bioanalytics, Technische Universität München, Emil Erlenmeyer Forum 5, 85354 Freising, Germany
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21
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Serra R, Easter SL, Jiang W, Baxley SE. Wnt5a as an effector of TGFβ in mammary development and cancer. J Mammary Gland Biol Neoplasia 2011; 16:157-67. [PMID: 21416313 PMCID: PMC3107509 DOI: 10.1007/s10911-011-9205-5] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/27/2011] [Accepted: 03/03/2011] [Indexed: 01/01/2023] Open
Abstract
Wnt5a is a member of the Wingless-related/MMTV-integration family of secreted growth factors, which are involved in a wide range of cellular processes. Wnt signaling can be broadly divided into two categories the canonical, ß-catenin-dependent pathway and the non-canonical ß-catenin-independent pathway. Wnt5a is a non-canonical signaling member of the Wnt family. Loss of Wnt5a is associated with early relapse of invasive breast cancer, increased metastasis, and poor survival in humans. It has been shown that TGF-ß directly regulates expression of Wnt5a in mammary gland and that Wnt5a mediates the effects of TGF-ß on branching during mammary gland development. Here we review the evidence suggesting Wnt5a acts as an effector of TGF-ß actions in breast cancer. It is suggested that the tumor suppressive functions of TGF-ß involve Wnt5a-mediated antagonism of Wnt/ß-catenin signaling and limiting the stem cell population. Interactions between TGF-ß and Wnt5a in metastasis appear to be more complex, and may depend on specific cues from the microenvironment as well as activation of specific intracellular signaling pathways.
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Affiliation(s)
- Rosa Serra
- Department of Cell Biology, University of Alabama at Birmingham, Birmingham, AL 35294-0005, USA.
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22
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Abstract
Collagen, the most abundant protein in animals, is a key component of extracellular matrices. Not only do collagens provide essential structural support for connective tissues, but they are also intimately involved in controlling a spectrum of cellular functions such as growth, differentiation, and morphogenesis. All collagens possess triple-helical regions through which they interact with a host of other proteins including cell surface receptors. A structurally diverse group of transmembrane receptors mediates the recognition of the collagen triple helix: integrins, discoidin domain receptors, glycoprotein VI, and leukocyte-associated immunoglobulin-like receptor-1. These collagen receptors regulate a wide range of behaviors including cell adhesion and migration, hemostasis, and immune function. Here these collagen receptors are discussed in terms of their molecular basis of collagen recognition, their signaling and developmental functions, and their roles in disease.
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Affiliation(s)
- Birgit Leitinger
- National Heart and Lung Institute, Imperial College London, London SW7 2AZ, United Kingdom.
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Ruiz PA, Jarai G. Collagen I induces discoidin domain receptor (DDR) 1 expression through DDR2 and a JAK2-ERK1/2-mediated mechanism in primary human lung fibroblasts. J Biol Chem 2011; 286:12912-23. [PMID: 21335558 DOI: 10.1074/jbc.m110.143693] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Discoidin domain receptors (DDRs) DDR1 and DDR2 are receptor tyrosine kinases with the unique ability among receptor tyrosine kinases to respond to collagen. Several signaling molecules have been implicated in DDR signaling, including Shp-2, Src, and MAPK pathways, but a detailed understanding of these pathways and their transcriptional targets is still lacking. Similarly, the regulation of the expression of DDRs is poorly characterized with only a few inflammatory mediators, such as lipopolysaccharide and interleukin-1β identified as playing a role in DDR1 expression. DDRs have been reported to induce the expression of various genes including matrix metalloproteinases and bone morphogenetic proteins, but the regulatory mechanisms underlying DDR-induced gene expression remain to be determined. The aim of the present work was to elucidate the molecular mechanisms implicated in the expression of DDRs and to identify DDR-induced signaling pathways and target genes. Our data show that collagen I induces the expression of DDR1 in a dose- and time-dependent manner in primary human lung fibroblasts. Furthermore, activation of DDR2, JAK2, and ERK1/2 MAPK signaling pathways was essential for collagen I-induced DDR1 and matrix metalloproteinase 10 expression. Finally, inhibition of the ERK1/2 pathway abrogated DDR1 expression by blocking the recruitment of the transcription factor polyoma enhancer A-binding protein 3 to the DDR1 promoter. Our data provide new insights into the molecular mechanisms of collagen I-induced DDR1 expression and demonstrate an important role for ERK1/2 activation and the recruitment of polyoma enhancer-A binding protein 3 to the DDR1 promoter.
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Affiliation(s)
- Pedro A Ruiz
- Novartis Institutes of Biomedical Research, Respiratory Disease Area, Horsham, RH12 5AB, United Kingdom
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Huang Y, Arora P, McCulloch CA, Vogel WF. The collagen receptor DDR1 regulates cell spreading and motility by associating with myosin IIA. J Cell Sci 2009; 122:1637-46. [PMID: 19401332 DOI: 10.1242/jcs.046219] [Citation(s) in RCA: 67] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The spreading and migration of cells on adhesive substrates is regulated by the counterbalance of contractile and protrusive forces. Non-muscle myosin IIA, an ubiquitously expressed contractile protein and enzyme, is implicated in the regulation of cell spreading and directional migration in response to various stimuli. Here we show that discoidin domain receptor 1 (DDR1), a tyrosine kinase receptor activated by type I collagen, associates with the non-muscle myosin IIA heavy chain (NMHC-IIA) upon ligand stimulation. An association was also indicated by coimmunoprecipitation of NMHC-IIA with full-length DDR1, but not with the truncated DDR1d-isoform lacking the kinase domain. DDR1 was important for assembly of NMHC-IIA into filaments on cells plated on collagen. DDR1 expression inhibited cell spreading over collagen but promoted cell migration. By contrast, blockade of non-muscle myosin II activity by blebbistatin enhanced cell spreading but inhibited migration over collagen. We propose that myosin and DDR1 impact cell spreading and migration by regulating adhesive contacts with collagen.
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Affiliation(s)
- Yun Huang
- Department of Laboratory Medicine, University of Toronto, Toronto, Ontario M5S 1A8, Canada
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KIBRA interacts with discoidin domain receptor 1 to modulate collagen-induced signalling. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2008; 1783:383-93. [PMID: 18190796 DOI: 10.1016/j.bbamcr.2007.12.007] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2007] [Revised: 11/30/2007] [Accepted: 12/03/2007] [Indexed: 12/29/2022]
Abstract
Mammary gland development is coupled to reproductive events by hormonal cues of ovarian and pituitary origin, which activate a genomic regulatory network. Identification of the components and regulatory links that comprise this network will provide the basis for defining the network's dynamic response during normal development and its perturbation during breast carcinogenesis. In this study KIBRA was identified as a transcript showing decreased expression associated with failed mammary gland development in Prlr knockout mammary epithelium. It is strongly up-regulated during pregnancy, falls during lactation and is again up-regulated during involution of the gland at weaning. A bioinformatic approach was undertaken to identify potential binding partners which interact with the WW domains of KIBRA. We show that KIBRA binds to a WW domain binding motif, PPxY, in the tyrosine kinase receptor DDR1, and dissociates upon treatment with the DDR1 ligands collagen type I or IV. In addition we show that KIBRA and DDR1 also interact with PKCz to form a trimeric complex. Finally, overexpression and knockdown studies demonstrate that KIBRA promotes the collagen-stimulated activation of the MAPK cascade. Thus KIBRA may play a role in how the reproductive state influences the mammary epithelial cell to respond to changing cell-context information, such as experienced during the tissue remodeling events of mammary gland development.
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Abstract
Discoidin domain receptor 1 (DDR1) is a tyrosine kinase receptor that is activated by native collagen. The physiological functions of DDR1 include matrix homeostasis and cell growth, adhesion, branching, and migration, but the specific role of DDR1 in the development and function of the inner ear has not been analyzed. Here, we show that deletion of the DDR1 gene in mouse is associated with a severe decrease in auditory function and substantial structural alterations in the inner ear. Immunohistochemical analysis demonstrated DDR1 expression in several locations in the cochlea, mostly associated with basement membrane and fibrillar collagens; in particular in basal cells of the stria vascularis, type III fibrocytes, and cells lining the basilar membrane of the organ of Corti. In the stria vascularis, loss of DDR1 function resulted in altered morphology of the basal cells and accumulation of electron-dense matrix within the strial epithelial layer in conjunction with a focal and progressive deterioration of strial cells. Cell types in proximity to the basilar membrane, such as Claudius', inner and outer sulcus cells, also showed marked ultrastructural alterations. Changes in the organ of Corti, such as deterioration of the supporting cells, specifically the outer hair cells, Deiters', Hensen's and bordering cells, are likely to interfere with mechanical properties of the organ and may be responsible for the hearing loss observed in DDR1-null mice. These findings may also have relevance to the role of DDR1 in other disease processes, for example, those affecting the kidney.
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Abdulhussein R, Koo DHH, Vogel WF. Identification of disulfide-linked dimers of the receptor tyrosine kinase DDR1. J Biol Chem 2007; 283:12026-33. [PMID: 18065762 DOI: 10.1074/jbc.m704592200] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Discoidin domain receptor 1 (DDR1) is a transmembrane receptor tyrosine kinase activated by triple-helical collagen. So far six different isoforms of DDR1 have been described. Aberrant expression and signaling of DDR1 have been implicated in several human diseases linked to accelerated matrix degradation and remodeling, including tumor invasion, atherosclerosis, and lung fibrosis. Here we show that DDR1 exists as a disulfide-linked dimer in transfected as well as endogenously expressing cells. This dimer formation occurred irrespective of its kinase domain, as dimers were also found for the truncated DDR1d isoform. A deletion analysis of the extracellular domain showed that DDR1 mutants lacking the stalk region failed to form dimers, whereas deletion of the discoidin domain did not prevent dimerization. Point mutagenesis within the stalk region suggested that cysteines 303 and 348 are necessary for dimerization, collagen binding, and activation of kinase function. The identification of DDR1 dimers provides new insights into the molecular structure of receptor tyrosine kinases and suggests distinct signaling mechanisms of each receptor subfamily.
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Affiliation(s)
- Rahim Abdulhussein
- Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Ontario M5S 1A8, Canada.
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Wang W, Morrison B, Galbaugh T, Jose CC, Kenney N, Cutler ML. Glucocorticoid induced expression of connective tissue growth factor contributes to lactogenic differentiation of mouse mammary epithelial cells. J Cell Physiol 2007; 214:38-46. [PMID: 17541935 DOI: 10.1002/jcp.21159] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The response of mammary epithelial cells to basement membrane and stroma induced signals contributes to the degree of differentiation in this tissue. The studies reported here indicate that connective tissue growth factor (CTGF) is highly elevated during lactogenic differentiation of the HC11 mouse mammary epithelial cell line. In addition, CTGF is expressed in the mouse mammary gland during pregnancy and lactation and it is expressed in primary mammary epithelial cell cultures established from pregnant mice. In HC11 cells CTGF is transcriptionally regulated by dexamethasone, but not by estrogen or progesterone, and CTGF expression is not dependent on TGFbeta. CTGF contributes to and is required for lactogenic differentiation of HC11 cells, as demonstrated by increased differentiation following expression of plasmid-encoded CTGF and decreased differentiation following depletion of endogenous CTGF with siRNA. Moreover, HC11 mouse mammary epithelial cells infected with an adenoviral vector encoding CTGF exhibit increased lactogenic differentiation. Plasmid vector-induced elevation of CTGF levels also increased the level of beta1 integrin in HC11 cells. Because the production of stromal factors is an important component of differentiation in mammary epithelial cells, the regulation of CTGF by glucocorticoids may play a critical role in this aspect of the control of differentiation. The studies reported here provide important information on the role of CTGF in mammary epithelial cell differentiation.
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Affiliation(s)
- Weihan Wang
- Department of Pathology, F. Edward Hebert School of Medicine, Uniformed Services University of the Health Sciences, Bethesda, Maryland 20814, USA
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Hansen C, Greengard P, Nairn AC, Andersson T, Vogel WF. Phosphorylation of DARPP-32 regulates breast cancer cell migration downstream of the receptor tyrosine kinase DDR1. Exp Cell Res 2006; 312:4011-8. [PMID: 17027969 DOI: 10.1016/j.yexcr.2006.09.003] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2006] [Revised: 08/31/2006] [Accepted: 09/04/2006] [Indexed: 10/24/2022]
Abstract
Cell migration plays a central role in processes such as development, wound healing and cancer metastasis. Here we describe a novel interaction between DDR1, a receptor tyrosine kinase activated by collagen, and the phosphoprotein DARPP-32 in mammary epithelial cells. DARPP-32 expression was readily detected in non-transformed mammary cell lines, but was strongly reduced or even absent in breast tumor cell lines, such as MCF7. Transfection of MCF7 cells with DARPP-32 resulted in severely impaired cell migration, while DARPP-32 transfection into the DDR1-deficient breast cancer cell line MDA-MB-231 did not alter migration. Co-expression of both DDR1 and DARPP-32 in MDA-MB-231 cells inhibited migration, thereby supporting a critical role of the DDR1/DARPP-32 complex in motility. Mutational substitution of the phosphorylation sites Thr-34 or Thr-75 on DARPP-32 revealed that phosphorylation of Thr-34 is necessary for the ability of DARPP-32 to impair breast tumor cell migration. Thus, DARPP-32 signaling downstream of DDR1 is a potential new target for effective anti-metastatic breast cancer therapy.
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Affiliation(s)
- Christian Hansen
- Experimental Pathology from the Department of Laboratory Medicine, Lund University, University Hospital Malmö, 205 02 Malmö, Sweden
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Avivi-Green C, Singal M, Vogel WF. Discoidin Domain Receptor 1–deficient Mice Are Resistant to Bleomycin-induced Lung Fibrosis. Am J Respir Crit Care Med 2006; 174:420-7. [PMID: 16690978 DOI: 10.1164/rccm.200603-333oc] [Citation(s) in RCA: 95] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
RATIONALE Discoidin domain receptor 1 (DDR1) is a tyrosine kinase activated by native collagens. Based on previous findings showing increased DDR1 expression in bronchoalveolar lavage cells from patients with idiopathic pulmonary fibrosis, we hypothesized that DDR1 mediates disease progression after lung injury. OBJECTIVES To investigate the inflammatory and fibrotic responses of DDR1 knockout and wild-type mice to bleomycin-induced lung injury. METHODS Age- and sex-matched DDR1 knockout and wild-type C57BL/6 mice received a single intratracheal instillation of 2 U/kg bleomycin or saline, respectively. After 2 wk, lung inflammation and fibrosis were assessed using immunohistochemistry, real-time polymerase chain reaction, TUNEL assay, ELISA, fluorescence-activated cell sorting, and Western blot analysis. MEASUREMENTS AND MAIN RESULTS Compared with wild-type animals, DDR1-null mice were largely protected against bleomycin-induced injury. Bleomycin-induced increases in collagen protein levels and tenascin-C mRNA levels were abrogated in knockout animals. Furthermore, myofibroblast expansion and apoptosis were much lower in these animals compared with their wild-type counterparts. Absence of inflammation in knockout mice was confirmed by lavage cell count and a cytokine ELISA. Western blot analysis of injured lung tissue revealed that DDR1-null mice failed to respond to the bleomycin insult with p38 MAPK activation, which was readily observed in wild-type mice. CONCLUSIONS DDR1 expression is a prerequisite for the development of lung inflammation and fibrosis. Blockade of DDR1 may therefore be a novel therapeutic intervention in patients with pulmonary fibrosis.
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Affiliation(s)
- Carmel Avivi-Green
- Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Ontario, Canada
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31
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Vogel WF, Abdulhussein R, Ford CE. Sensing extracellular matrix: an update on discoidin domain receptor function. Cell Signal 2006; 18:1108-16. [PMID: 16626936 DOI: 10.1016/j.cellsig.2006.02.012] [Citation(s) in RCA: 257] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2006] [Accepted: 02/20/2006] [Indexed: 02/06/2023]
Abstract
Discoidin Domain Receptors (DDRs) have recently emerged as non-integrin-type receptors for collagen. The two mammalian gene products Discoidin Domain Receptor 1 and -2 constitute a subfamily of tyrosine kinase receptors that are selectively expressed in a number of different cell types and organs. Upon collagen activation, DDRs regulate cell adhesion, proliferation and extracellular matrix remodeling. Here we review the various signaling pathways and cellular responses evoked by activated DDRs. Additionally, we give an overview of the more recent advances in understanding the role of DDRs in various human diseases, in particular during tumor progression, atherosclerosis, inflammation and tissue fibrosis. Furthermore, we discuss potential roles of genes homologous to mammalian DDRs identified in flies, worms and sponges. We show that the structural organization of these DDR-related genes is highly conserved throughout evolution suggesting that invertebrate DDRs may also function as receptors for collagen. By highlighting current questions about these unusual collagen receptors, we hope to attract new research on DDRs from a variety of different fields.
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Affiliation(s)
- Wolfgang F Vogel
- Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Ontario Canada, M5S 1A8.
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