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Kuemper M, Hessenthaler S, Zamek J, Mauch C, Zigrino P. 434 Deletion of endothelial cell MMP14 reduces melanoma growth and skin fibrosis. J Invest Dermatol 2022. [DOI: 10.1016/j.jid.2022.09.448] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Pach E, Brinckmann J, Rübsam M, Kümper M, Mauch C, Zigrino P. 274 Role of fibroblast-MMP14 in melanoma growth. J Invest Dermatol 2021. [DOI: 10.1016/j.jid.2021.08.280] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Kümper M, Hessenthaler S, Zamek J, Niland S, Pach E, Mauch C, Zigrino P. 252 Loss of endothelial cell MMP14 reduces melanoma growth and metastasis by increasing tumor vessel stability. J Invest Dermatol 2021. [DOI: 10.1016/j.jid.2021.08.258] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Fromme JE, Zigrino P. Melanoma metastasis, BRAF mutation and GJB5 connexin expression: a new prognostic factor. Br J Dermatol 2021; 186:13-14. [PMID: 34590708 DOI: 10.1111/bjd.20756] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2021] [Accepted: 08/25/2021] [Indexed: 11/30/2022]
Affiliation(s)
- J E Fromme
- Department of Dermatology and Venereology, Faculty of Medicine, University Hospital of Cologne, University of Cologne, Cologne, 50937, Germany.,Mildred Scheel School of Oncology Aachen Bonn Cologne Düsseldorf (MSSO ABCD), Faculty of Medicine and University Hospital of Cologne, Cologne, 50937, Germany
| | - P Zigrino
- Department of Dermatology and Venereology, Faculty of Medicine, University Hospital of Cologne, University of Cologne, Cologne, 50937, Germany
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Fromme J, Mauch C, Zigrino P. 515 Potential mediators of melanoma cell resistance. J Invest Dermatol 2019. [DOI: 10.1016/j.jid.2019.07.565] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Pach E, Brinckmann J, Fox J, Mauch C, Zigrino P. 449 Deletion of fibroblast MMP-14 in the skin leads to reduced melanoma growth. J Invest Dermatol 2019. [DOI: 10.1016/j.jid.2019.07.499] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Giebeler N, Schönefuß A, Landsberg J, Tueting T, Mauch C, Zigrino P. 525 ADAM9 modulates melanoma development and metastasis. J Invest Dermatol 2017. [DOI: 10.1016/j.jid.2017.07.722] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Zigrino P, Brinckmann J, Niehoff A, Lu Y, Giebeler N, Eckes B, Kadler K, Mauch C. 573 Fibroblast derived MMP-14 is the main collagenase for skin homeostasis. J Invest Dermatol 2016. [DOI: 10.1016/j.jid.2016.06.597] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Heuser S, Hufbauer M, Steiger J, Marshall J, Sterner-Kock A, Mauch C, Zigrino P, Akgül B. The fibronectin/α3β1 integrin axis serves as molecular basis for keratinocyte invasion induced by βHPV. Oncogene 2016; 35:4529-39. [PMID: 26804167 DOI: 10.1038/onc.2015.512] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2015] [Revised: 12/09/2015] [Accepted: 12/11/2015] [Indexed: 12/18/2022]
Abstract
Organ-transplant-recipients exhibit cancerization of the skin from which multiple human papillomavirus (HPV)-positive squamous cell carcinomas (SCCs) arise. However, the molecular basis for HPV-induced invasion of skin keratinocytes is not known. We generated a transgenic mouse model expressing the E7 oncoprotein of HPV8 in the murine epidermis under the control of the keratin-14 promoter and showed that E7 is carcinogenic in mice. We further showed that both, the E7-expressing keratinocyte and mesenchymal components of the extracellular matrix as critical in eliciting the invasive behavior. E7 expression in basal keratinocytes, grown on fibronectin, led to epithelial-mesenchymal transition mediated by a cadherin switch. E7-positive keratinocytes displayed enhanced EDA-fibronectin expression and secretion and stimulated dermal fibroblasts to express EDA-fibronectin. Deposition of fibronectin was also detected in the peritumoral stroma of HPV8-positive skin SCC. When grown on fibronectin, E7-positive keratinocytes, in particular stem cell-like cells, exhibited increased cell surface levels of the α3-integrin chain. Functional blocking confirmed α3 as a critical molecule sufficient to induce E7-mediated invasion. This mechanistic link is further supported by expression of an E7-mutant, impaired in targeting α3 to the cell surface. These findings highlight the importance of epithelial-extracellular matrix interaction required for keratinocyte invasion and provide further mechanistic evidence for a role of HPV in skin carcinogenesis.
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Affiliation(s)
- S Heuser
- Institute of Virology, University of Cologne, Cologne, Germany
| | - M Hufbauer
- Institute of Virology, University of Cologne, Cologne, Germany
| | - J Steiger
- Department of Dermatology and Venerology, University of Cologne, Cologne, Germany
| | - J Marshall
- Barts Cancer Institute, Centre for Tumour Biology, Queen Mary University of London, John Vane Science Centre, London, UK
| | - A Sterner-Kock
- Center for Experimental Medicine, University Hospital, University of Cologne, Cologne, Germany
| | - C Mauch
- Department of Dermatology and Venerology, University of Cologne, Cologne, Germany
| | - P Zigrino
- Department of Dermatology and Venerology, University of Cologne, Cologne, Germany
| | - B Akgül
- Institute of Virology, University of Cologne, Cologne, Germany
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Batinica M, Akgül B, Silling S, Mauch C, Zigrino P. Correlation of Merkel cell polyomavirus positivity with PDGFRα mutations and survivin expression in Merkel cell carcinoma. J Dermatol Sci 2015; 79:43-9. [DOI: 10.1016/j.jdermsci.2015.04.002] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2015] [Revised: 03/26/2015] [Accepted: 04/07/2015] [Indexed: 12/17/2022]
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Abken H, Schmidt P, Schlaak M, Hombach A, Bangard C, Kurschat P, Zigrino P. 62 Proffered Paper: Regression of Metastatic Melanoma by Targeting Melanoma Stem Cells. Eur J Cancer 2012. [DOI: 10.1016/s0959-8049(12)70766-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Akgul B, Bauer B, Zigrino P, Storey A, Mauch C, Pfister H. Upregulation of lipocalin-2 in human papillomavirus-positive keratinocytes and cutaneous squamous cell carcinomas. J Gen Virol 2010; 92:395-401. [DOI: 10.1099/vir.0.025064-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
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Eberle J, Spangler B, Becker JC, Heinemann SH, Klein CA, Kunz M, Kuphal S, Langer P, Mauch C, Meierjohann S, Paschen A, Schadendorf D, Schartl M, Schittek B, Schönherr R, Tüting T, Zigrino P, Bosserhoff AK. Multicentre study on standardisation of melanoma cell culture--an initiative of the German Melanoma Research Network. Pigment Cell Melanoma Res 2010; 23:296-8. [PMID: 20137059 DOI: 10.1111/j.1755-148x.2010.00684.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Abstract
The development and progression of tumors result from the concerted activity not only of tumor cells with neighboring cells e.g., fibroblasts and inflammatory cells. Host-tumor interactions are considered critical in tumor invasion and metastasis. In vitro studies as well as established in vivo models have analysed the reciprocal effects of tumor-host interactions for the tumor invasion process. These studies have shown that modifications in the extracellular matrix composition surrounding the tumors as well as alterations in the expression of tumor cell receptors or in the expression of growth factors/cytokines and proteases, are critical regulators of a developing tumor. We shortly review the most important and well characterized mechanisms involved in the progression of tumor cells through tissues, especially those participating in cellular communication, cell adhesion, and proteolysis.
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Affiliation(s)
- P Zigrino
- Department of Dermatology and Center for Molecular Medicine (CMMC), University of Cologne, Joseph-Stelzmann strasse, 50931 Cologne, Germany
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Zigrino P, Drescher C, Mauch C. Collagen-induced proMMP-2 activation by MT1-MMP in human dermal fibroblasts and the possible role of alpha2beta1 integrins. Eur J Cell Biol 2001; 80:68-77. [PMID: 11211937 DOI: 10.1078/0171-9335-00134] [Citation(s) in RCA: 86] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Culture of human dermal fibroblasts within a three-dimensional matrix composed of native type I collagen fibrils is widely used to study the cellular responses to the extracellular matrix. Upon contact with native type I collagen fibrils human skin fibroblasts activate latent 72-kDa type IV collagenase/ gelatinase (MMP-2) to its active 59- and 62-kDa forms. This activation did not occur when cells were cultured on plastic dishes coated with monomeric type I collagen or its denatured form, gelatin. Activation could be inhibited by antibodies against MT1-MMP, by the addition of TIMP-2 and by prevention of MT1-MMP processing. MT1-MMP protein was detected at low levels as active protein in fibroblasts cultured as monolayers. In collagen gel cultures, an increase of the active, 60-kDa MT1-MMP and an additional 63-kDa protein corresponding to inactive MT1-MMP was detected. Incubation of medium containing latent MMP-2 with cell membranes isolated from fibroblasts grown in collagen gels caused activation of the enzyme. Furthermore, regulation of MT1-MMP expression in collagen cultures seems to be mediated by alpha2beta1 integrins. These studies suggest that activation of the proMMP-2 is regulated at the cell surface by a mechanism which is sensitive to cell culture in contact with physiologically relevant matrices and which depends on the ratio of proenzyme and the specific inhibitor TIMP-2.
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Affiliation(s)
- P Zigrino
- Department of Dermatology, University of Cologne, Germany
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Baumann P, Zigrino P, Mauch C, Breitkreutz D, Nischt R. Membrane-type 1 matrix metalloproteinase-mediated progelatinase A activation in non-tumorigenic and tumorigenic human keratinocytes. Br J Cancer 2000; 83:1387-93. [PMID: 11044366 PMCID: PMC2408778 DOI: 10.1054/bjoc.2000.1454] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Elevated expression of type IV collagenases (MMP-2 and MMP-9) has been strongly correlated with tumour progression and metastasis in various tumours. Here, we analysed expression and activation of these MMPs in non-tumourigenic HaCaT cells and the malignant HaCaT variant II-4(rt). In monolayer cultures, both cell types secreted latent MMP-2 (proMMP-2) in comparable amounts, while MMP-9 production was clearly higher in II-4(rt)cells. Upon contact with fibrillar collagen type I the malignant II-4(rt)cells, but not the HaCaT cells, gained the capability to activate proMMP-2. This process is shown to be membrane-associated and mediated by MT1-MMP. Surprisingly, all membrane preparations from either HaCaT cells or II-4(rt)cells grown as monolayers, as well as within collagen gels, contained considerable amounts of active MT1-MMP. However, within collagen gels HaCaT cells showed significantly higher TIMP-2 levels compared to II-4(rt)cells. This indicates that TIMP-2 might play a central role for MT1-MMP-mediated gelatinolytic activity. Indeed, collagen type I-induced MT1-MMP-mediated proMMP-2 activation by II-4(rt)membranes could be completely abolished by an excess of TIMP-2. In conclusion, our data suggest that MT1-MMP-mediated proMMP-2 activation might be associated with malignant progression of epidermal tumour cells.
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Affiliation(s)
- P Baumann
- Department of Dermatology, University of Cologne, Köln, 50924, USA
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Abstract
The regulation of matrix deposition is a key event in many physiological and pathological situations. It involves the activity of mediators in autocrine and paracrine fashions and the contact of cells with the surrounding extracellular matrix as well. The tightly regulated balance of both mechanisms guarantees rapid and adaptive cellular responses to meet changes in the biological requirements of the environment. Disturbances lead to wound healing defects or the development of fibrosis. The molecular mechanisms for these regulatory events are only partially understood, but involve the activity of integrins and a structural continuum of extracellular matrix-receptor-cytoskeleton-nucleus for transfer of information and the regulation of activated genes.
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Affiliation(s)
- B Eckes
- Department of Dermatology, University of Cologne, Joseph Stelzmann Strasse 9, 50931, Köln, Germany
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Kurschat P, Zigrino P, Nischt R, Breitkopf K, Steurer P, Klein CE, Krieg T, Mauch C. Tissue inhibitor of matrix metalloproteinase-2 regulates matrix metalloproteinase-2 activation by modulation of membrane-type 1 matrix metalloproteinase activity in high and low invasive melanoma cell lines. J Biol Chem 1999; 274:21056-62. [PMID: 10409657 DOI: 10.1074/jbc.274.30.21056] [Citation(s) in RCA: 125] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Activation of pro-matrix metalloproteinase (MMP)-2 on the surface of malignant cells by membrane-bound MT1-MMP is believed to play a critical role during tumor progression and metastasis. In this study we present evidence that MT1-MMP plays a key role for the in vitro invasiveness of malignant melanoma. Melanoma cell lines secreted latent MMP-2 when cultured on plastic. However, when cells were grown in floating type I collagen lattices, only high invasive melanoma cells activated proMMP-2. Activation could be inhibited by antibodies against MT1-MMP, by addition of recombinant tissue inhibitor of metalloproteinases (TIMP)-2 and by inhibition of MT1-MMP cleavage. MT1-MMP protein was detected as an inactive protein in all cell lines cultured as monolayers, whereas in collagen gels, active MT1-MMP protein was detected in the membranes of both high and low invasive melanoma cells. Production of TIMP-2 was about 10-fold higher in low invasive cells as compared with high invasive melanoma cells and was further increased in the low invasive cells upon contact to collagen. Thus, in melanoma cells TIMP-2 expression levels might regulate MT1-MMP-mediated activation of proMMP-2. High invasive melanoma cells displayed increased in vitro invasiveness, which was inhibited by TIMP-2. These data indicate the importance of these enzymes for the invasion processes and support a role for MT1-MMP as an activator of proMMP-2 in malignant melanoma.
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Affiliation(s)
- P Kurschat
- Department of Dermatology, University of Cologne, 50924 Cologne, Germany
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Kurschat P, Röckel D, Faust A, Zigrino P, Nischt R, Klein E, Mauch C. MMP-2 activation by membrane-type-1-MMP (MT1-MMP) in melanoma cells is dependent on TIMP-2 expression. J Dermatol Sci 1998. [DOI: 10.1016/s0923-1811(98)83732-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Breitkopf K, Sudbeck B, Kurschat P, Zigrino P, Mauch C. Regulation of MMP expression by 3-dimensional fibrin and collagen matrices. J Dermatol Sci 1998. [DOI: 10.1016/s0923-1811(98)83742-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Zigrino P, Gaietta G, Zambonin-Zallone A, Pelletier AJ, Quaranta V. Evidence for a K+ channel requirement in spreading of rat basophilic leukemia cells on fibronectin-coated surfaces. Biochem Biophys Res Commun 1996; 221:51-8. [PMID: 8660342 DOI: 10.1006/bbrc.1996.0543] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
We investigated the ionic requirements for the early events of cell-extracellular matrix interactions leading to cell spreading. We found that potassium ions were required specifically in several cell types. Adhesion to fibronectin- (FN) coated surfaces was independent of K+ in the medium. In contrast, cells that adhered to FN in the absence of K+ failed to spread. This requirement for K+ occurred only during a discrete time frame: in the first 15 minutes following adhesion. Moreover, we identified a specific trans-membrane flux of the radioactive K+ analog 86Rb+, the kinetics of which correlated with this requirement. Both this ion flux and cell spreading were blocked by the K+ -channel inhibitors tetraethylammonium (TEA) and 4-aminopyridine (4-AP). Our results suggest that this K+ ion flux and the channels that regulate it are important in regulating the initial responses to adhesion that lead to spreading.
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Affiliation(s)
- P Zigrino
- The Scripps Research Institute, Department of Cell Biology, La Jolla, California 92037, USA
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Paniccia R, Riccioni T, Zani BM, Zigrino P, Scotlandi K, Teti A. Calcitonin down-regulates immediate cell signals induced in human osteoclast-like cells by the bone sialoprotein-IIA fragment through a postintegrin receptor mechanism. Endocrinology 1995; 136:1177-86. [PMID: 7867571 DOI: 10.1210/endo.136.3.7867571] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Calcitonin (CT) is a peptide hormone that interacts with the cAMP-and phospholipase C-associated CT receptor subtypes. We investigated whether CT modulates the interaction of human tumoral osteoclast-like (GCT23) cells with a protein of the bone matrix, bone sialoprotein-II (BSP-II). Single GCT23 cells loaded with the intracellular Ca2+ indicator fura-2 were treated with the maximal active dose (300 micrograms/ml) of the 18-mer Arg-Gly-Asp (RGD)-containing BSP-IIA fragment, and the cytosolic free Ca2+ concentration ([Ca2+]i) was measured by dual wavelength microfluorometry. BSP-IIA stimulated an elevation in [Ca2+]i, consisting mainly of a peak, followed by a rapid return toward baseline. Pretreatment with CT induced a modest elevation of [Ca2+]i. However, CT significantly inhibited the response to BSP-IIA in a dose-dependent manner. Maximal inhibition (90% vs. untreated) was observed in the micromolar range. The intracellular mechanisms leading to this effect were investigated by pretreatment of GCT23 cells with the cAMP permeant analog, (Bu2)cAMP, and the protein kinase-C-activating agent, 12-O-tetradecanoylphorbol 13-acetate. Similar to CT, both agents inhibited the response to 300 micrograms/ml BSP-IIA. The effect induced by CT was specific, because an increase in the extracellular Ca2+ concentration, which is also known to inhibit bone resorption, failed to modify the ability of BSP-IIA to alter [Ca2+]i in GCT23 cells. To investigate whether the CT-induced alteration of BSP-IIA-dependent cell signals was due to a modification in the synthesis of cell surface receptors (integrins) for the extracellular matrix macromolecules, 1-h CT-treated [35S]methionine metabolically labeled GCT23 cell lysates were immunoprecipitated with anti-alpha 3-, -alpha v-, -beta 1-, and -beta 3-integrin subunit antibodies. Autoradiography demonstrated that 10(-7)-10(-6) M CT did not alter new synthesis of the alpha v beta 3 and the alpha 3 beta 1 receptors. Similarly, CT did not affect surface expression of these receptors, assessed by enzyme-linked immunosorbent assay. Finally, no alteration of the adhesion rate and spreading of GCT23 cells onto BSP-IIA-coated substrates was observed. This indicates that CT-induced down-regulation of immediate cell signals prompted by BSP-IIA in GCT23 cells is a postintegrin receptor event.
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Affiliation(s)
- R Paniccia
- Department of Experimental Medicine, University of L'Aquila, Italy
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Chenu C, Colucci S, Grano M, Zigrino P, Barattolo R, Zambonin G, Baldini N, Vergnaud P, Delmas PD, Zallone AZ. Osteocalcin induces chemotaxis, secretion of matrix proteins, and calcium-mediated intracellular signaling in human osteoclast-like cells. J Biophys Biochem Cytol 1994; 127:1149-58. [PMID: 7962073 PMCID: PMC2200057 DOI: 10.1083/jcb.127.4.1149] [Citation(s) in RCA: 115] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
Osteocalcin, also called Bone Gla Protein (BGP), is the most abundant of the non-collagenous proteins of bone produced by osteoblasts. It consists of a single chain of 46-50 amino acids, according to the species, and contains three vitamin K-dependent gamma-carboxyglutamic acid residues (GLA), involved in its binding to calcium and hydroxylapatite. Accumulating evidences suggest its involvement in bone remodeling, its physiological role, however, is still unclear. In this study the adhesion properties and the biological effects of osteocalcin on osteoclasts have been analyzed using as an experimental model, human osteoclast-like cells derived from giant cell tumors of bone (GCT). Osteocalcin promoted adhesion and spreading of these cells, triggering the release of bone sialoprotein (BSP), osteopontin (OPN) and fibronectin (FN), that in turn induced the clustering in focal adhesions of beta 1 and beta 3 integrin chains. Spreading was dependent upon the synthesis of these proteins. In fact, when the cells were incubated in the presence of monensin during the adhesion assay, they still adhered but spreading did not occur, focal adhesions disappeared and BSP, OPN, and FN were accumulated in intracellular granules. Furthermore osteocalcin induced chemotaxis in a dose-dependent manner. The action of BGP on osteoclasts was mediated by an intracellular calcium increase due to release from thapsigargin-sensitive stores. These results provide evidences that BGP exerts a role in the resorption process, inducing intracellular signaling, migration and adhesion, followed by synthesis and secretion of endogenous proteins.
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Affiliation(s)
- C Chenu
- Institut National de la Sante et de la Recherche Medicale Unit 403 Lyon, France
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Grano M, Colucci S, De Bellis M, Zigrino P, Argentino L, Zambonin G, Serra M, Scotlandi K, Teti A, Zambonin Zallone A. New model for bone resorption study in vitro: human osteoclast-like cells from giant cell tumors of bone. J Bone Miner Res 1994; 9:1013-20. [PMID: 7942147 DOI: 10.1002/jbmr.5650090708] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Cells harvested from 12 human giant cell tumors of bone and kept in culture for several passages were characterized for bone-resorbing capability, total and tartrate-resistant acid phosphatase activity, response to the calciotropic hormone calcitonin, cell proliferation, multinucleation after passages, and presence of calcium sensing. Cells obtained from three tumors presented a complete panel of osteoclast characteristics and maintained their multinuclearity after several passages. Cells from four other tumors increased their cAMP levels after treatment with calcitonin, and the other five apparently consisted of cells of stromal origin. These human cell populations with osteoclast characteristics may provide valid in vitro models for the investigation of osteoclastic differentiation and activity.
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Affiliation(s)
- M Grano
- Institute of Human Anatomy, University of Bari, Italy
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Grano M, Zigrino P, Colucci S, Zambonin G, Trusolino L, Serra M, Baldini N, Teti A, Marchisio PC, Zallone AZ. Adhesion properties and integrin expression of cultured human osteoclast-like cells. Exp Cell Res 1994; 212:209-18. [PMID: 8187815 DOI: 10.1006/excr.1994.1136] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Osteoclast interaction with extracellular matrix drives the sequential events that end with bone resorption. However, the role of matrix proteins is not yet fully understood. We studied this problem on human osteoclast-like cells derived from giant cell tumors of bone (GCT cells). On GCT cells we considered cytoskeletal organization, adhesion properties, and integrin expression upon plating in serum-free medium onto fibronectin (FN), collagen (COL), thrombospondin (TSP), bone sialoprotein (BSPII), and osteopontin (OPN). GCT cells promptly adhered and spread on FN, BSPII, and OPN, while only 50% adhered on COL and none on TSP. The integrin beta 1 chain was always associated to focal adhesions, while the alpha v beta 3 heterodimer was detected in focal contacts only upon plating on BSPII, OPN, and FN. The focal clustering of beta 1 was impaired by monensin treatment, indicating that endogenous FN secretion was required to drive beta 1 into focal contacts. Conversely, alpha v beta 3 clustering was also not affected by monensin when cells were plated onto plasma FN. Immunoprecipitation of metabolically labeled GCT cell lysates showed that three different heterodimers (alpha v beta 3, alpha 3 beta 1, and alpha 5 beta 1) were assembled. Adhesion to FN was completely inhibited by beta 1 antibodies at dilutions up to 1:400, while beta 3 antibodies, at similar dilutions, impaired spreading but not adhesion. We conclude that alpha v beta 3 is the main integrin used by GCT cells in bone recognition. We also suggest that selected substrata may induce the release and the organization of endogenous FN that eventually drives the recruitment of a beta 1 integrin receptor into focal contacts.
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Affiliation(s)
- M Grano
- Istituto di Anatomia Umana Normale, Università di Bari, Italy
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Colucci S, Grano M, Zigrino P, Santacroce G, Zambonin G, Teti A, Zambonin Zallone A. Human osteoclast-like cells recognize laminin via an RGD independent mechanism. Boll Soc Ital Biol Sper 1993; 69:295-300. [PMID: 7510504] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Interactions between cells from human giant cell tumors of bone and the extracellular matrix protein laminin were studied. Cells were capable of recognizing this substratum via a RGD-independent mechanism. Recognition induces adhesion and spreading onto laminin. This protein triggered the release of cellular FN which in turn enhanced recruitment of the beta 1 chain-containing integrin receptor.
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Affiliation(s)
- S Colucci
- Istituto di Anatomia Umana Normale, Università di Bari
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