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Bomfim LM, Neves SP, Coelho AMRM, Nogueira ML, Dias RB, Valverde LDF, Rocha CAG, Soares MBP, Batista AA, Correa RS, Bezerra DP. Ru(II)-based complexes containing 2-thiouracil derivatives suppress liver cancer stem cells by targeting NF-κB and Akt/mTOR signaling. Cell Death Discov 2024; 10:270. [PMID: 38830859 PMCID: PMC11148080 DOI: 10.1038/s41420-024-02036-w] [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: 08/15/2023] [Revised: 05/16/2024] [Accepted: 05/21/2024] [Indexed: 06/05/2024] Open
Abstract
Cancer stem cells (CSCs) are defined as a rare population of cancer cells related to tumor initiation and maintenance. These cells are primarily responsible for tumor growth, invasion, metastasis, recurrence, and resistance to chemotherapy. In this paper, we demonstrated the ability of Ru(II)-based complexes containing 2-thiouracil derivatives with the chemical formulas trans-[Ru(2TU)(PPh3)2(bipy)]PF6 (1) and trans-[Ru(6m2TU)(PPh3)2(bipy)]PF6 (2) (where 2TU = 2-thiouracil and 6m2TU = 6-methyl-2-thiouracil) to suppress liver CSCs by targeting NF-κB and Akt/mTOR signaling. Complexes 1 and 2 displayed potent cytotoxic effects on cancer cell lines and suppressed liver CSCs from HepG2 cells. Increased phosphatidylserine exposure, loss of mitochondrial transmembrane potential, increased PARP (Asp214) cleavage, DNA fragmentation, chromatin condensation and cytoplasmic shrinkage were detected in HepG2 cells treated with these complexes. Mechanistically, complexes 1 and 2 target NF-κB and Akt/mTOR signaling in HepG2 cells. Cell motility inhibition was also detected in HepG2 cells treated with these complexes. Complexes 1 and 2 also inhibited tumor progression in mice with HepG2 cell xenografts and exhibited tolerable systemic toxicity. Taken together, these results indicate that these complexes are new anti-HCC drug candidates that can suppress liver CSCs.
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Affiliation(s)
- Larissa M Bomfim
- Gonçalo Moniz Institute, Oswaldo Cruz Foundation (IGM-FIOCRUZ/BA), Salvador, Bahia, 40296-710, Brazil
| | - Sara P Neves
- Gonçalo Moniz Institute, Oswaldo Cruz Foundation (IGM-FIOCRUZ/BA), Salvador, Bahia, 40296-710, Brazil
| | - Amanda M R M Coelho
- Gonçalo Moniz Institute, Oswaldo Cruz Foundation (IGM-FIOCRUZ/BA), Salvador, Bahia, 40296-710, Brazil
| | - Mateus L Nogueira
- Gonçalo Moniz Institute, Oswaldo Cruz Foundation (IGM-FIOCRUZ/BA), Salvador, Bahia, 40296-710, Brazil
| | - Rosane B Dias
- Gonçalo Moniz Institute, Oswaldo Cruz Foundation (IGM-FIOCRUZ/BA), Salvador, Bahia, 40296-710, Brazil
- Department of Propedeutics, School of Dentistry of the Federal University of Bahia, Salvador, Bahia, 40110-909, Brazil
- Department of Biological Sciences, State University of Feira de Santana, Feira de Santana, Bahia, 44036-900, Brazil
| | - Ludmila de F Valverde
- Gonçalo Moniz Institute, Oswaldo Cruz Foundation (IGM-FIOCRUZ/BA), Salvador, Bahia, 40296-710, Brazil
- Department of Dentistry, Federal University of Sergipe, Lagarto, Sergipe, 49400-000, Brazil
| | - Clarissa A G Rocha
- Gonçalo Moniz Institute, Oswaldo Cruz Foundation (IGM-FIOCRUZ/BA), Salvador, Bahia, 40296-710, Brazil
- Department of Propedeutics, School of Dentistry of the Federal University of Bahia, Salvador, Bahia, 40110-909, Brazil
- Department of Pathology, School of Medicine of the Federal University of Bahia, Salvador, Bahia, 40110-909, Brazil
- Center for Biotechnology and Cell Therapy, D'Or Institute for Research and Education (IDOR), Salvador, Bahia, 41253-190, Brazil
| | - Milena B P Soares
- Gonçalo Moniz Institute, Oswaldo Cruz Foundation (IGM-FIOCRUZ/BA), Salvador, Bahia, 40296-710, Brazil
- SENAI Institute of Innovation (ISI) in Health Advanced Systems, University Center SENAI/CIMATEC, Salvador, Bahia, 41650-010, Brazil
| | - Alzir A Batista
- Department of Chemistry, Federal University of São Carlos, São Paulo, São Carlos, 13561-901, Brazil
| | - Rodrigo S Correa
- Department of Chemistry, Federal University of Ouro Preto, Ouro Preto, Minas Gerais, 35400-000, Brazil
| | - Daniel P Bezerra
- Gonçalo Moniz Institute, Oswaldo Cruz Foundation (IGM-FIOCRUZ/BA), Salvador, Bahia, 40296-710, Brazil.
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2
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Silva VR, Santos LDS, de Castro MVL, Dias RB, Valverde LDF, Rocha CAG, Soares MBP, Quadros CA, Correa RS, Batista AA, Bezerra DP. A novel ruthenium complex with 5-fluorouracil suppresses colorectal cancer stem cells by inhibiting Akt/mTOR signaling. Cell Death Discov 2023; 9:460. [PMID: 38104089 PMCID: PMC10725484 DOI: 10.1038/s41420-023-01759-6] [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: 06/19/2023] [Revised: 11/20/2023] [Accepted: 11/30/2023] [Indexed: 12/19/2023] Open
Abstract
[Ru(5-FU)(PPh3)2(bipy)]PF6 (Ru/5-FU) is a novel ruthenium complex with 5-fluorouracil with promising potential against colorectal cancer (CRC). In the present study, we investigated the molecular mechanism of Ru/5-FU action in HCT116 CRC cells. Ru/5-FU exhibited potent cytotoxicity on a panel of cancer cell lines and on primary cancer cells and induced apoptosis in HCT116 CRC cells. Ru/5-FU reduced AKT1 gene transcripts, as well as the expression of Akt1 and Akt (pS473) and downstream Akt proteins mTOR (pS2448), S6 (pS235/pS236), 4EBP1 (pT36/pT45), GSK-3β (pS9) and NF-κB p65 (pS529), but not Akt upstream proteins Hsp90 and PI3K p85/p55 (pT458/pT199), indicating an inhibitory action of Akt/mTOR signaling. Ru/5-FU increased LC3B expression and reduced p62/SQSTM1 levels, indicating autophagy induction. Curiously, the autophagy inhibitors 3-methyladenine and chloroquine increased Ru/5-FU-induced cell death, indicating an induction of cytoprotective autophagy by this compound. Ru/5-FU also reduced clonogenic survival, as well as the percentage of CD133+ cells and colonosphere formation, indicating that Ru/5-FU can suppress stem cells in HCT116 cells. Ru/5-FU inhibited cell migration and invasion in wound healing assays and Transwell cell invasion assays, along with a reduction in vimentin expression and an increase in E-cadherin levels, indicating that Ru/5-FU can interfere with epithelial-mesenchymal transition. Ru/5-FU also inhibited in vivo HCT116 cell development and experimental lung metastases in mouse xenograft models. Altogether, these results indicate that Ru/5-FU is an anti-CRC chemotherapy drug candidate with the ability to suppress stemness in CRC cells by inhibiting Akt/mTOR signaling.
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Affiliation(s)
- Valdenizia R Silva
- Gonçalo Moniz Institute, Oswaldo Cruz Foundation (IGM-FIOCRUZ/BA), Salvador, Bahia, 40296-710, Brazil
| | - Luciano de S Santos
- Gonçalo Moniz Institute, Oswaldo Cruz Foundation (IGM-FIOCRUZ/BA), Salvador, Bahia, 40296-710, Brazil
| | - Maria V L de Castro
- Gonçalo Moniz Institute, Oswaldo Cruz Foundation (IGM-FIOCRUZ/BA), Salvador, Bahia, 40296-710, Brazil
| | - Rosane B Dias
- Gonçalo Moniz Institute, Oswaldo Cruz Foundation (IGM-FIOCRUZ/BA), Salvador, Bahia, 40296-710, Brazil
- Department of Propedeutics, School of Dentistry of the Federal University of Bahia, Salvador, Bahia, 40110-909, Brazil
| | - Ludmila de F Valverde
- Gonçalo Moniz Institute, Oswaldo Cruz Foundation (IGM-FIOCRUZ/BA), Salvador, Bahia, 40296-710, Brazil
| | - Clarissa A G Rocha
- Gonçalo Moniz Institute, Oswaldo Cruz Foundation (IGM-FIOCRUZ/BA), Salvador, Bahia, 40296-710, Brazil
- Department of Propedeutics, School of Dentistry of the Federal University of Bahia, Salvador, Bahia, 40110-909, Brazil
| | - Milena B P Soares
- Gonçalo Moniz Institute, Oswaldo Cruz Foundation (IGM-FIOCRUZ/BA), Salvador, Bahia, 40296-710, Brazil
- SENAI Institute of Innovation (ISI) in Health Advanced Systems, University Center SENAI/CIMATEC, Salvador, Bahia, 41650-010, Brazil
| | - Claudio A Quadros
- São Rafael Hospital, Rede D'Or/São Luiz, Salvador, Bahia, 41253-190, Brazil
- Bahia State University, Salvador, Bahia, 41150-000, Brazil
| | - Rodrigo S Correa
- Department of Chemistry, Federal University of Ouro Preto, Ouro Preto, Minas Gerais, 35400-000, Brazil
| | - Alzir A Batista
- Department of Chemistry, Federal University of São Carlos, São Carlos, São Paulo, 13561-901, Brazil
| | - Daniel P Bezerra
- Gonçalo Moniz Institute, Oswaldo Cruz Foundation (IGM-FIOCRUZ/BA), Salvador, Bahia, 40296-710, Brazil.
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3
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Santos LDS, Silva VR, de Castro MVL, Dias RB, Valverde LDF, Rocha CAG, Soares MBP, Quadros CA, Dos Santos ER, Oliveira RMM, Carlos RM, Nogueira PCL, Bezerra DP. New ruthenium-xanthoxylin complex eliminates colorectal cancer stem cells by targeting the heat shock protein 90 chaperone. Cell Death Dis 2023; 14:832. [PMID: 38102125 PMCID: PMC10724293 DOI: 10.1038/s41419-023-06330-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2023] [Revised: 11/14/2023] [Accepted: 11/23/2023] [Indexed: 12/17/2023]
Abstract
In this work, we describe a novel ruthenium-xanthoxylin complex, [Ru(phen)2(xant)](PF6) (RXC), that can eliminate colorectal cancer (CRC) stem cells by targeting the chaperone Hsp90. RXC exhibits potent cytotoxicity in cancer cell lines and primary cancer cells, causing apoptosis in HCT116 CRC cells, as observed by cell morphology, YO-PRO-1/PI staining, internucleosomal DNA fragmentation, mitochondrial depolarization, and PARP cleavage (Asp214). Additionally, RXC can downregulate the HSP90AA1 and HSP90B1 genes and the expression of HSP90 protein, as well as the expression levels of its downstream/client elements Akt1, Akt (pS473), mTOR (pS2448), 4EBP1 (pT36/pT45), GSK-3β (pS9), and NF-κB p65 (pS529), implying that these molecular chaperones can be molecular targets for RXC. Moreover, this compound inhibited clonogenic survival, the percentage of the CRC stem cell subpopulation, and colonosphere formation, indicating that RXC can eliminate CRC stem cells. RXC reduced cell migration and invasion, decreased vimentin and increased E-cadherin expression, and induced an autophagic process that appeared to be cytoprotective, as autophagy inhibitors enhanced RXC-induced cell death. In vivo studies showed that RXC inhibits tumor progression and experimental metastasis in mice with CRC HCT116 cell xenografts. Taken together, these results highlight the potential of the ruthenium complex RXC in CRC therapy with the ability to eliminate CRC stem cells by targeting the chaperone Hsp90.
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Affiliation(s)
- Luciano de S Santos
- Gonçalo Moniz Institute, Oswaldo Cruz Foundation (IGM-FIOCRUZ/BA), Salvador, BA, 40296-710, Brazil
| | - Valdenizia R Silva
- Gonçalo Moniz Institute, Oswaldo Cruz Foundation (IGM-FIOCRUZ/BA), Salvador, BA, 40296-710, Brazil
| | - Maria V L de Castro
- Gonçalo Moniz Institute, Oswaldo Cruz Foundation (IGM-FIOCRUZ/BA), Salvador, BA, 40296-710, Brazil
| | - Rosane B Dias
- Gonçalo Moniz Institute, Oswaldo Cruz Foundation (IGM-FIOCRUZ/BA), Salvador, BA, 40296-710, Brazil
- Department of Propedeutics, School of Dentistry of the Federal University of Bahia, Salvador, BA, 40110-909, Brazil
| | - Ludmila de F Valverde
- Gonçalo Moniz Institute, Oswaldo Cruz Foundation (IGM-FIOCRUZ/BA), Salvador, BA, 40296-710, Brazil
| | - Clarissa A G Rocha
- Gonçalo Moniz Institute, Oswaldo Cruz Foundation (IGM-FIOCRUZ/BA), Salvador, BA, 40296-710, Brazil
- Department of Propedeutics, School of Dentistry of the Federal University of Bahia, Salvador, BA, 40110-909, Brazil
| | - Milena B P Soares
- Gonçalo Moniz Institute, Oswaldo Cruz Foundation (IGM-FIOCRUZ/BA), Salvador, BA, 40296-710, Brazil
- SENAI Institute of Innovation (ISI) in Health Advanced Systems, University Center SENAI/CIMATEC, Salvador, BA, 41650-010, Brazil
| | - Claudio A Quadros
- São Rafael Hospital, Rede D'Or/São Luiz, Salvador, BA, 41253-190, Brazil
- Bahia State University, Salvador, BA, 41150-000, Brazil
| | - Edjane R Dos Santos
- Institute of Natural, Human and Social Sciences, Federal University of Mato Grosso, Sinop, MT, 78557-267, Brazil
| | - Regina M M Oliveira
- Coordination of Science and Technology, Balsas Science Center, Federal University of Maranhão, Balsas, MA, 65800-000, Brazil
| | - Rose M Carlos
- Department of Chemistry, Federal University of São Carlos, São Carlos, SP, 13561-901, Brazil
| | - Paulo C L Nogueira
- Department of Chemistry, Federal University of Sergipe, São Cristóvão, SE, 49100-000, Brazil
| | - Daniel P Bezerra
- Gonçalo Moniz Institute, Oswaldo Cruz Foundation (IGM-FIOCRUZ/BA), Salvador, BA, 40296-710, Brazil.
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da Silva JLG, Viana AR, Passos DF, Krause LMF, Miron VV, Schetinger MRC, Pillat MM, Palma TV, Leal DBR. Istradefylline modulates purinergic enzymes and reduces malignancy-associated factors in B16F10 melanoma cells. Purinergic Signal 2023; 19:633-650. [PMID: 36522571 PMCID: PMC10754812 DOI: 10.1007/s11302-022-09909-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2022] [Accepted: 11/26/2022] [Indexed: 12/23/2022] Open
Abstract
ATP and adenosine exert pivotal roles in the development, maintenance, and metastatic spreading of melanoma. The action of such key melanoma tumor microenvironment (TME) constituents might be complementary or opposed, and their effects are not exclusive to immune cells but also to other host cells and tumor cells. The effects of ATP are controlled by the axis CD39/73, resulting in adenosine, the main actor in the TME, and A2A is the crucial mediator of its effects. We evaluated ATP and adenosine signaling through A2A on B16F10 melanoma cells using istradefylline (IST) (antiparkinsonian A2A antagonist) and caffeine (CAF) treatments after exposure to ATP and adenosine. Adenosine increased melanoma cell viability and proliferation in a concentration-dependent manner. ATP increases viability only as a substrate by CD39 to produce adenosine. Both IST and CAF are toxic to B16F10 cells, but only IST potentialized paclitaxel-induced cytotoxic effects, even decreasing its IC50 value. IST positively modulated CD39 and CD73 expression. CD39 activity was increased, and E-ADA was reduced, indicating that the melanoma cells promoted compensatory feedback in the production and maintenance of adenosine levels. A2A antagonism by IST reduced the factors associated with malignancy, like migration, adhesion, colony formation, and the capacity to produce melanin. Moreover, IST significantly increases nitric oxide (NO) production, which correlates to a decline in melanoma cell viability by apoptotic events. Altogether, our results suggest that adenosine signaling through A2A is essential for B16F10 cells, and its inhibition by IST causes compensatory purinergic enzymatic modulations. Furthermore, IST is a promising therapy that provides new ways to improve current melanoma treatments.
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Affiliation(s)
- Jean Lucas Gutknecht da Silva
- Laboratório de Imunobiologia Experimental e Aplicada (LABIBIO), Departamento de Microbiologia E Parasitologia, Centro de Ciências da Saúde, Universidade Federal de Santa Maria, Av. Roraima, 1000, Prédio 20, Santa Maria, RS, 97105-900, Brazil
- Programa de Pós-Graduação Em Bioquímica Toxicológica, Centro de Ciências Naturais E Exatas, Universidade Federal de Santa Maria, Santa Maria, RS, Brazil
| | - Altevir Rossato Viana
- Programa de Pós-Graduação Em Nanociências, Laboratório de Biociências, Universidade Franciscana, Santa Maria, RS, Brazil
| | - Daniela Ferreira Passos
- Laboratório de Imunobiologia Experimental e Aplicada (LABIBIO), Departamento de Microbiologia E Parasitologia, Centro de Ciências da Saúde, Universidade Federal de Santa Maria, Av. Roraima, 1000, Prédio 20, Santa Maria, RS, 97105-900, Brazil
- Programa de Pós-Graduação Em Bioquímica Toxicológica, Centro de Ciências Naturais E Exatas, Universidade Federal de Santa Maria, Santa Maria, RS, Brazil
| | | | - Vanessa Valéria Miron
- Programa de Pós-Graduação Em Bioquímica Toxicológica, Centro de Ciências Naturais E Exatas, Universidade Federal de Santa Maria, Santa Maria, RS, Brazil
| | - Maria Rosa Chitolina Schetinger
- Programa de Pós-Graduação Em Bioquímica Toxicológica, Centro de Ciências Naturais E Exatas, Universidade Federal de Santa Maria, Santa Maria, RS, Brazil
| | - Micheli Mainardi Pillat
- Laboratório de Imunobiologia Experimental e Aplicada (LABIBIO), Departamento de Microbiologia E Parasitologia, Centro de Ciências da Saúde, Universidade Federal de Santa Maria, Av. Roraima, 1000, Prédio 20, Santa Maria, RS, 97105-900, Brazil
| | - Taís Vidal Palma
- Programa de Pós-Graduação Em Bioquímica Toxicológica, Centro de Ciências Naturais E Exatas, Universidade Federal de Santa Maria, Santa Maria, RS, Brazil
| | - Daniela Bitencourt Rosa Leal
- Laboratório de Imunobiologia Experimental e Aplicada (LABIBIO), Departamento de Microbiologia E Parasitologia, Centro de Ciências da Saúde, Universidade Federal de Santa Maria, Av. Roraima, 1000, Prédio 20, Santa Maria, RS, 97105-900, Brazil.
- Programa de Pós-Graduação Em Bioquímica Toxicológica, Centro de Ciências Naturais E Exatas, Universidade Federal de Santa Maria, Santa Maria, RS, Brazil.
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Dow LP, Parmar T, Marchetti MC, Pruitt BL. Engineering tools for quantifying and manipulating forces in epithelia. BIOPHYSICS REVIEWS 2023; 4:021303. [PMID: 38510344 PMCID: PMC10903508 DOI: 10.1063/5.0142537] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2023] [Accepted: 04/20/2023] [Indexed: 03/22/2024]
Abstract
The integrity of epithelia is maintained within dynamic mechanical environments during tissue development and homeostasis. Understanding how epithelial cells mechanosignal and respond collectively or individually is critical to providing insight into developmental and (patho)physiological processes. Yet, inferring or mimicking mechanical forces and downstream mechanical signaling as they occur in epithelia presents unique challenges. A variety of in vitro approaches have been used to dissect the role of mechanics in regulating epithelia organization. Here, we review approaches and results from research into how epithelial cells communicate through mechanical cues to maintain tissue organization and integrity. We summarize the unique advantages and disadvantages of various reduced-order model systems to guide researchers in choosing appropriate experimental systems. These model systems include 3D, 2D, and 1D micromanipulation methods, single cell studies, and noninvasive force inference and measurement techniques. We also highlight a number of in silico biophysical models that are informed by in vitro and in vivo observations. Together, a combination of theoretical and experimental models will aid future experiment designs and provide predictive insight into mechanically driven behaviors of epithelial dynamics.
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Affiliation(s)
| | - Toshi Parmar
- Department of Physics, University of California Santa Barbara, Santa Barbara, California 93106, USA
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Brusco I, Becker G, Palma TV, Pillat MM, Scussel R, Steiner BT, Sampaio TB, Ardisson-Araújo DMP, de Andrade CM, Oliveira MS, Machado-De-Avila RA, Oliveira SM. Kinin B 1 and B 2 receptors mediate cancer pain associated with both the tumor and oncology therapy using aromatase inhibitors. Sci Rep 2023; 13:4418. [PMID: 36932156 PMCID: PMC10023805 DOI: 10.1038/s41598-023-31535-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2022] [Accepted: 03/14/2023] [Indexed: 03/19/2023] Open
Abstract
Pain caused by the tumor or aromatase inhibitors (AIs) is a disabling symptom in breast cancer survivors. Their mechanisms are unclear, but pro-algesic and inflammatory mediators seem to be involved. Kinins are endogenous algogenic mediators associated with various painful conditions via B1 and B2 receptor activation, including chemotherapy-induced pain and breast cancer proliferation. We investigate the involvement of the kinin B1 and B2 receptors in metastatic breast tumor (4T1 breast cancer cells)-caused pain and in aromatase inhibitors (anastrozole or letrozole) therapy-associated pain. A protocol associating the tumor and antineoplastic therapy was also performed. Kinin receptors' role was investigated via pharmacological antagonism, receptors protein expression, and kinin levels. Mechanical and cold allodynia and muscle strength were evaluated. AIs and breast tumor increased kinin receptors expression, and tumor also increased kinin levels. AIs caused mechanical allodynia and reduced the muscle strength of mice. Kinin B1 (DALBk) and B2 (Icatibant) receptor antagonists attenuated these effects and reduced breast tumor-induced mechanical and cold allodynia. AIs or paclitaxel enhanced breast tumor-induced mechanical hypersensitivity, while DALBk and Icatibant prevented this increase. Antagonists did not interfere with paclitaxel's cytotoxic action in vitro. Thus, kinin B1 or B2 receptors can be a potential target for treating the pain caused by metastatic breast tumor and their antineoplastic therapy.
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Affiliation(s)
- Indiara Brusco
- Graduate Program in Biological Sciences: Biochemistry Toxicology, Department of Biochemistry and Molecular Biology, Federal University of Santa Maria, Av. Roraima 1000, Camobi, Santa Maria, RS, 97105-900, Brazil.
| | - Gabriela Becker
- Graduate Program in Biological Sciences: Biochemistry Toxicology, Department of Biochemistry and Molecular Biology, Federal University of Santa Maria, Av. Roraima 1000, Camobi, Santa Maria, RS, 97105-900, Brazil
| | - Tais Vidal Palma
- Graduate Program in Biological Sciences: Biochemistry Toxicology, Department of Biochemistry and Molecular Biology, Federal University of Santa Maria, Av. Roraima 1000, Camobi, Santa Maria, RS, 97105-900, Brazil
| | - Micheli Mainardi Pillat
- Department of Microbiology and Parasitology, Federal University of Santa Maria, Santa Maria, RS, Brazil
| | - Rahisa Scussel
- Graduate Program in Health Sciences, University of Extreme South Catarinense, Criciuma, SC, Brazil
| | - Bethina Trevisol Steiner
- Graduate Program in Health Sciences, University of Extreme South Catarinense, Criciuma, SC, Brazil
| | - Tuane Bazanella Sampaio
- Graduate Program in Pharmacology, Department of Physiology and Pharmacology, Federal University of Santa Maria, Santa Maria, RS, Brazil
| | - Daniel Mendes Pereira Ardisson-Araújo
- Graduate Program in Biological Sciences: Biochemistry Toxicology, Department of Biochemistry and Molecular Biology, Federal University of Santa Maria, Av. Roraima 1000, Camobi, Santa Maria, RS, 97105-900, Brazil
- Department of Cell Biology, Institute of Biological Sciences, University of Brasilia, Brasilia, DF, Brazil
| | - Cinthia Melazzo de Andrade
- Graduate Program in Biological Sciences: Biochemistry Toxicology, Department of Biochemistry and Molecular Biology, Federal University of Santa Maria, Av. Roraima 1000, Camobi, Santa Maria, RS, 97105-900, Brazil
| | - Mauro Schneider Oliveira
- Graduate Program in Pharmacology, Department of Physiology and Pharmacology, Federal University of Santa Maria, Santa Maria, RS, Brazil
| | | | - Sara Marchesan Oliveira
- Graduate Program in Biological Sciences: Biochemistry Toxicology, Department of Biochemistry and Molecular Biology, Federal University of Santa Maria, Av. Roraima 1000, Camobi, Santa Maria, RS, 97105-900, Brazil.
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7
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MCT4 Promotes Tumor Malignancy in F98 Glioma Cells. JOURNAL OF ONCOLOGY 2021; 2021:6655529. [PMID: 33936203 PMCID: PMC8060090 DOI: 10.1155/2021/6655529] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/20/2020] [Revised: 03/16/2021] [Accepted: 03/25/2021] [Indexed: 12/31/2022]
Abstract
Monocarboxylate transporter 4 (MCT4, SLC16A3) is elevated under hypoxic conditions in many malignant tumors including gliomas. Moreover, MCT4 expression is associated with shorter overall survival. However, the functional consequences of MCT4 expression on the distinct hallmarks of cancer have not yet been explored at the cellular level. Here, we investigated the impact of MCT4 overexpression on proliferation, survival, cell death, migration, invasion, and angiogenesis in F98 glioma cells. Stable F98 glioma cell lines with MCT4 overexpression, normal expression, and knockdown were generated. Distinct hallmarks of cancer were examined using in silico analysis, various in vitro cell culture assays, and ex vivo organotypic rat brain slice culture model. Consistent with its function as lactate and proton exporter, MCT4 expression levels correlated inversely with extracellular pH and proportionally with extracellular lactate concentrations. Our results further indicate that MCT4 promotes proliferation and survival by altered cell cycle regulation and cell death mechanisms. Moreover, MCT4 overexpression enhances cell migration and invasiveness via reorganization of the actin cytoskeleton. Finally, MCT4 inhibition mitigates the induction of angiogenesis, suggesting that MCT4 also plays a crucial role in tumor-related angiogenesis. In summary, our data highlight MCT4/SLC16A3 as a key gene for distinct hallmarks of tumor malignancy in glioma cells.
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Kobelt D, Walther W, Stein US. Real-Time Cell Migration Monitoring to Analyze Drug Synergism in the Scratch Assay Using the IncuCyte System. Methods Mol Biol 2021; 2294:133-142. [PMID: 33742398 DOI: 10.1007/978-1-0716-1350-4_9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/28/2023]
Abstract
Drug-mediated interference with metastasis represents a key approach to improve cancer therapy. In this regard, appropriate in vitro assays are needed to identify drugs, which inhibit cell migration as one feature for metastatic potential of cancer cells. One such migration assay is the wound healing or scratch assay, designed to allow cells for closure of an artificially generated gap (wound/scratch) in the monolayer. To identify possibly effective anti-migratory drugs as monotherapy or as synergistic drug combination, novel screening tools besides viability measurements at the experimental endpoint are needed. In this context, particularly drug combinations allow to increase treatment efficacy paralleled by lowered side effects. Here, a protocol for real-time monitoring cellular motility and its inhibition by anti-migratory drugs and combinations by the IncuCyte system and a 96-well scratch assay is described. A pipetting scheme allowing data collection for synergy calculation using one plate per replicate is provided. Using the IncuCyte System 2, drug combinations built of three biological replicates each using three technical replicates can be tested in parallel within hours to few days to accelerate identification of efficient antimetastatic drugs.
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Affiliation(s)
- Dennis Kobelt
- Experimental and Clinical Research Center, Charité - Universitätsmedizin Berlin, Berlin, Germany. .,Max-Delbrück-Center for Molecular Medicine, AG Translational Oncology of Solid Tumors, Berlin, Germany. .,German Cancer Consortium (DKTK), Heidelberg, Heidelberg, Germany.
| | - Wolfgang Walther
- Experimental and Clinical Research Center, Charité - Universitätsmedizin Berlin, Berlin, Germany.,Max-Delbrück-Center for Molecular Medicine, AG Translational Oncology of Solid Tumors, Berlin, Germany
| | - Ulrike S Stein
- Translational Oncology of Solid Tumors Experimental and Clinical Research Center, Charité - Universitätsmedizin Berlin, and Max-Delbrück-Center for Molecular Medicine, Berlin, Germany
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Aqueous ethanol extract of Libidibia ferrea (Mart. Ex Tul) L.P. Queiroz (juca) exhibits antioxidant and migration-inhibiting activity in human gastric adenocarcinoma (ACP02) cells. PLoS One 2020; 15:e0226979. [PMID: 31952077 PMCID: PMC6968947 DOI: 10.1371/journal.pone.0226979] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2019] [Accepted: 12/10/2019] [Indexed: 01/24/2023] Open
Abstract
Libidibia ferrea (juca) is a plant belonging to the Fabaceae (Leguminosae) family, whose antioxidant activity has been widely described in the literature. We evaluated this parameter of Aqueous ethanol extract (AE), ethyl acetate (ACO), chloroform (CLO) and hexane (HEX) extracts of L. ferrea. We then tested the most active extract for its toxicity and ability to inhibit migratory activity in the ACP02 gastric adenocarcinoma cell line in vitro. The AE and ACO extracts both had antioxidant activity, the AE extract showing greater potential. This may reflect that both extracts contained phenolic compounds. Although AE extract showed no cytotoxic, mutagenic or genotoxic effect, it altered cell morphology and migration activity. Analysis of apoptosis/necrosis indicated that this parameter does not appear to account for the apparent ability of AE to inhibit cancer cell migration. We speculate that the morphological changes in AE-treated cells could be due to cytoskeleton alterations related to the presence of myo-inositol in AE extract. Together, our results demonstrate this extract of L. ferrea can act as an exogenous antioxidant and might prove useful in efforts to fight secondary tumors.
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Pinto MEF, Najas JZG, Magalhães LG, Bobey AF, Mendonça JN, Lopes NP, Leme FM, Teixeira SP, Trovó M, Andricopulo AD, Koehbach J, Gruber CW, Cilli EM, Bolzani VS. Inhibition of Breast Cancer Cell Migration by Cyclotides Isolated from Pombalia calceolaria. JOURNAL OF NATURAL PRODUCTS 2018; 81:1203-1208. [PMID: 29757646 PMCID: PMC5974699 DOI: 10.1021/acs.jnatprod.7b00969] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
Two new bracelet cyclotides from roots of Pombalia calceolaria with potential anticancer activity have been characterized in this work. The cyclotides Poca A and B (1 and 2) and the previously known CyO4 (3) were de novo sequenced by MALDI-TOF/TOF mass spectrometry (MS). The MS2 spectra were examined and the amino acid sequences were determined. The purified peptides were tested for their cytotoxicity and effects on cell migration of MDA-MB-231, a triple-negative breast cancer cell line. The isolated cyclotides reduced the number of cancer cells by more than 80% at 20 μM, and the concentration-related cytotoxic responses were observed with IC50 values of 1.8, 2.7, and 9.8 μM for Poca A (1), Poca B (2), and CyO4 (3), respectively. Additionally, the inhibition of cell migration (wound-healing assay) exhibited that CyO4 (3) presents an interesting activity profile, in being able to inhibit cell migration (50%) at a subtoxic concentration (2 μM). The distribution of these cyclotides in the roots was analyzed by MALDI imaging, demonstrating that all three compounds are present in the phloem and cortical parenchyma regions.
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Affiliation(s)
- Meri Emili F. Pinto
- Institute
of Chemistry, São Paulo State University−UNESP, 14800-060, Araraquara, SP, Brazil
- Tel: 55-16-33019510. Fax: 55-16-33222308. E-mail:
| | - Jhenny Z. G. Najas
- Institute
of Chemistry, Federal University of Rio
de Janeiro−UFRJ, 21940-910, Rio de Janeiro, RJ, Brazil
| | - Luma G. Magalhães
- Computational
and Medicinal Chemistry Laboratory, Physics Institute of São
Carlos, The University of São Paulo−USP, 13563-120, São
Carlos, SP, Brazil
| | - Antonio F. Bobey
- Institute
of Chemistry, São Paulo State University−UNESP, 14800-060, Araraquara, SP, Brazil
| | - Jacqueline N. Mendonça
- Faculty
of Pharmaceutical Sciences of Ribeirão Preto, The University of São Paulo−USP, 14040-903, Ribeirão Preto, SP, Brazil
| | - Norberto P. Lopes
- Faculty
of Pharmaceutical Sciences of Ribeirão Preto, The University of São Paulo−USP, 14040-903, Ribeirão Preto, SP, Brazil
| | - Flávia M. Leme
- Faculty
of Pharmaceutical Sciences of Ribeirão Preto, The University of São Paulo−USP, 14040-903, Ribeirão Preto, SP, Brazil
| | - Simone P. Teixeira
- Faculty
of Pharmaceutical Sciences of Ribeirão Preto, The University of São Paulo−USP, 14040-903, Ribeirão Preto, SP, Brazil
| | - Marcelo Trovó
- Institute
of Chemistry, Federal University of Rio
de Janeiro−UFRJ, 21940-910, Rio de Janeiro, RJ, Brazil
| | - Adriano D. Andricopulo
- Computational
and Medicinal Chemistry Laboratory, Physics Institute of São
Carlos, The University of São Paulo−USP, 13563-120, São
Carlos, SP, Brazil
| | - Johannes Koehbach
- Center
for Physiology and Pharmacology, Medical
University of Vienna, 1090, Vienna, Austria
- Institute
for Molecular Bioscience, The University
of Queensland, 4072, St. Lucia, Queensland, Australia
| | - Christian W. Gruber
- Center
for Physiology and Pharmacology, Medical
University of Vienna, 1090, Vienna, Austria
| | - Eduardo Maffud Cilli
- Institute
of Chemistry, São Paulo State University−UNESP, 14800-060, Araraquara, SP, Brazil
| | - Vanderlan S. Bolzani
- Institute
of Chemistry, São Paulo State University−UNESP, 14800-060, Araraquara, SP, Brazil
- Tel: 55-16-33019660. Fax: 55-16-33222308. E-mail:
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Soares ER, Monteiro EB, de Bem GF, Inada KO, Torres AG, Perrone D, Soulage CO, Monteiro MC, Resende AC, Moura-Nunes N, Costa CA, Daleprane JB. Up-regulation of Nrf2-antioxidant signaling by Açaí (Euterpe oleracea Mart.) extract prevents oxidative stress in human endothelial cells. J Funct Foods 2017. [DOI: 10.1016/j.jff.2017.07.035] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
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Lenz P, Brückner M, Ketelhut S, Heidemann J, Kemper B, Bettenworth D. Multimodal Quantitative Phase Imaging with Digital Holographic Microscopy Accurately Assesses Intestinal Inflammation and Epithelial Wound Healing. J Vis Exp 2016. [PMID: 27685659 DOI: 10.3791/54460] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
The incidence of inflammatory bowel disease, i.e., Crohn's disease and Ulcerative colitis, has significantly increased over the last decade. The etiology of IBD remains unknown and current therapeutic strategies are based on the unspecific suppression of the immune system. The development of treatments that specifically target intestinal inflammation and epithelial wound healing could significantly improve management of IBD, however this requires accurate detection of inflammatory changes. Currently, potential drug candidates are usually evaluated using animal models in vivo or with cell culture based techniques in vitro. Histological examination usually requires the cells or tissues of interest to be stained, which may alter the sample characteristics and furthermore, the interpretation of findings can vary by investigator expertise. Digital holographic microscopy (DHM), based on the detection of optical path length delay, allows stain-free quantitative phase contrast imaging. This allows the results to be directly correlated with absolute biophysical parameters. We demonstrate how measurement of changes in tissue density with DHM, based on refractive index measurement, can quantify inflammatory alterations, without staining, in different layers of colonic tissue specimens from mice and humans with colitis. Additionally, we demonstrate continuous multimodal label-free monitoring of epithelial wound healing in vitro, possible using DHM through the simple automated determination of the wounded area and simultaneous determination of morphological parameters such as dry mass and layer thickness of migrating cells. In conclusion, DHM represents a valuable, novel and quantitative tool for the assessment of intestinal inflammation with absolute values for parameters possible, simplified quantification of epithelial wound healing in vitro and therefore has high potential for translational diagnostic use.
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Affiliation(s)
- Philipp Lenz
- Department of Medicine B, University Hospital Münster; Institute of Palliative Care, University Hospital Münster
| | | | | | | | - Björn Kemper
- Biomedical Technology Center, University of Münster;
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Magalhaes LG, Marques FB, da Fonseca MB, Rogério KR, Graebin CS, Andricopulo AD. Discovery of a Series of Acridinones as Mechanism-Based Tubulin Assembly Inhibitors with Anticancer Activity. PLoS One 2016; 11:e0160842. [PMID: 27508497 PMCID: PMC4980028 DOI: 10.1371/journal.pone.0160842] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2016] [Accepted: 07/26/2016] [Indexed: 12/16/2022] Open
Abstract
Microtubules play critical roles in vital cell processes, including cell growth, division, and migration. Microtubule-targeting small molecules are chemotherapeutic agents that are widely used in the treatment of cancer. Many of these compounds are structurally complex natural products (e.g., paclitaxel, vinblastine, and vincristine) with multiple stereogenic centers. Because of the scarcity of their natural sources and the difficulty of their partial or total synthesis, as well as problems related to their bioavailability, toxicity, and resistance, there is an urgent need for novel microtubule binding agents that are effective for treating cancer but do not have these disadvantages. In the present work, our lead discovery effort toward less structurally complex synthetic compounds led to the discovery of a series of acridinones inspired by the structure of podophyllotoxin, a natural product with important microtubule assembly inhibitory activity, as novel mechanism-based tubulin assembly inhibitors with potent anticancer properties and low toxicity. The compounds were evaluated in vitro by wound healing assays employing the metastatic and triple negative breast cancer cell line MDA-MB-231. Four compounds with IC50 values between 0.294 and 1.7 μM were identified. These compounds showed selective cytotoxicity against MDA-MB-231 and DU-145 cancer cell lines and promoted cell cycle arrest in G2/M phase and apoptosis. Consistent with molecular modeling results, the acridinones inhibited tubulin assembly in in vitro polymerization assays with IC50 values between 0.9 and 13 μM. Their binding to the colchicine-binding site of tubulin was confirmed through competitive assays.
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Affiliation(s)
- Luma G. Magalhaes
- Laboratório de Química Medicinal e Computacional, Centro de Pesquisa e Inovação em Biodiversidade e Fármacos, Instituto de Física de São Carlos, Universidade de São Paulo, 13563–120, São Carlos-SP, Brazil
| | - Fernando B. Marques
- Laboratório de Diversidade Molecular e Química Medicinal, Departamento de Química, Universidade Federal Rural do Rio de Janeiro, 23897–000, Seropédica-RJ, Brazil
| | - Marina B. da Fonseca
- Laboratório de Diversidade Molecular e Química Medicinal, Departamento de Química, Universidade Federal Rural do Rio de Janeiro, 23897–000, Seropédica-RJ, Brazil
| | - Kamilla R. Rogério
- Laboratório de Diversidade Molecular e Química Medicinal, Departamento de Química, Universidade Federal Rural do Rio de Janeiro, 23897–000, Seropédica-RJ, Brazil
| | - Cedric S. Graebin
- Laboratório de Diversidade Molecular e Química Medicinal, Departamento de Química, Universidade Federal Rural do Rio de Janeiro, 23897–000, Seropédica-RJ, Brazil
| | - Adriano D. Andricopulo
- Laboratório de Química Medicinal e Computacional, Centro de Pesquisa e Inovação em Biodiversidade e Fármacos, Instituto de Física de São Carlos, Universidade de São Paulo, 13563–120, São Carlos-SP, Brazil
- * E-mail:
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Combination of lapatinib with isothiocyanates overcomes drug resistance and inhibits migration of HER2 positive breast cancer cells. Breast Cancer 2016; 24:271-280. [PMID: 27154770 PMCID: PMC5318491 DOI: 10.1007/s12282-016-0700-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2015] [Accepted: 04/25/2016] [Indexed: 10/28/2022]
Abstract
BACKGROUND Lapatinib is a commonly used drug that interrupts signaling from the epidermal growth factor receptors, EGFR and HER2/neu. Long-term exposure to lapatinib during therapy eliminates cells that are sensitive to the drug; however, at the same time it increases probability of lapatinib-resistant cell selection. The aim of this study was to verify whether combinations of lapatinib with one of isothiocyanates (sulforaphane, erucin or sulforaphene), targeting different levels of HER2 signaling pathway, exert stronger cytotoxic effect than therapy targeting the receptor only, using heterogeneous populations consisting of lapatinib-sensitive and lapatinib-resistant breast cancer cells. METHODS Lapatinib-sensitive HER2 overproducing SKBR-3 breast cancer cells and their lapatinib-resistant derivatives were combined at different proportions to simulate enrichment of cancer cell population in a drug-resistant fraction during lapatinib therapy. Effects of treatments on cell survival (MTT), apoptosis induction (PARP cleavage), prosurvival signaling (p-Akt, p-S6) as well as cell motility (wound healing assay) and invasion (Boyden chamber assay) were investigated. RESULTS Combination of lapatinib with any of isothiocyanates significantly decreased cell viability and inhibited migration of populations consisting of different amounts of drug-sensitive and drug-resistant cells. In case of population entirely composed of lapatinib-resistant cells the most effective was combination of lapatinib with erucin which decreased cell viability and motility, phosphorylation of Akt, S6 and VEGF level more efficiently than each agent alone. CONCLUSIONS Combination of lapatinib and isothiocyanates, especially erucin, might be considered as an effective treatment reducing metastatic potential of breast cancer cells, even these with the drug resistance phenotype.
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da Costa PM, da Costa MP, Carvalho AA, Cavalcanti SMT, de Oliveira Cardoso MV, de Oliveira Filho GB, de Araújo Viana D, Fechine-Jamacaru FV, Leite ACL, de Moraes MO, Pessoa C, Ferreira PMP. Improvement of in vivo anticancer and antiangiogenic potential of thalidomide derivatives. Chem Biol Interact 2015; 239:174-83. [DOI: 10.1016/j.cbi.2015.06.037] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2015] [Revised: 06/22/2015] [Accepted: 06/26/2015] [Indexed: 11/27/2022]
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Post-transcriptional control of Amblyomin-X on secretion of vascular endothelial growth factor and expression of adhesion molecules in endothelial cells. Toxicon 2015; 101:1-10. [PMID: 25912945 DOI: 10.1016/j.toxicon.2015.04.002] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2015] [Revised: 03/20/2015] [Accepted: 04/21/2015] [Indexed: 12/12/2022]
Abstract
Angiogenesis is a pivotal process of homeostasis and tissue repair, but it also favours neovascularisation syndromes and cancer nutrition. The chemical mediation of angiogenesis is complex, involving a balance between serine proteases and their inhibitors. We addressed the mechanisms of action of a Kunitz serine protease inhibitor (KPI) on spontaneous angiogenesis, using Amblyomin-X, a KPI designed from the cDNA library of the Amblyomma cajennense tick. Amblyomin-X treatment (10-1000 ng/10 μL; each 48 h; 3 times) reduced the number of vessels in the subcutaneous dorsal tissue of male Swiss mice, as measured by intravital microscopy, haematoxylin-eosin staining, and PECAM-1 immunofluorescence labeling. Incubation of Amblyomin-X with t-End endothelial cells, a murine endothelial microvascular lineage, did not alter cell proliferation, cell-cycle phases, necrosis and apoptosis, and the production of nitric oxide and prostaglandin E2. Nevertheless, Amblyomin-X treatment reduced t-End migration and adhesion to Matrigel(®), and inhibited the VEGF-A secretion and VCAM-1 and β3 integrin expressions by posttranscriptional pathways. Together, data herein outline novel posttranscriptional mechanisms of KPIs on endothelial cells during angiogenesis and point out the possible application of Amblyomin-X as a local inhibitor to undesired neovascularisation process.
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Bettenworth D, Lenz P, Krausewitz P, Brückner M, Ketelhut S, Domagk D, Kemper B. Quantitative stain-free and continuous multimodal monitoring of wound healing in vitro with digital holographic microscopy. PLoS One 2014; 9:e107317. [PMID: 25251440 PMCID: PMC4174518 DOI: 10.1371/journal.pone.0107317] [Citation(s) in RCA: 63] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2014] [Accepted: 08/08/2014] [Indexed: 12/12/2022] Open
Abstract
Impaired epithelial wound healing has significant pathophysiological implications in several conditions including gastrointestinal ulcers, anastomotic leakage and venous or diabetic skin ulcers. Promising drug candidates for accelerating wound closure are commonly evaluated in in vitro wound assays. However, staining procedures and discontinuous monitoring are major drawbacks hampering accurate assessment of wound assays. We therefore investigated digital holographic microscopy (DHM) to appropriately monitor wound healing in vitro and secondly, to provide multimodal quantitative information on morphological and functional cell alterations as well as on motility changes upon cytokine stimulation. Wound closure as reflected by proliferation and migration of Caco-2 cells in wound healing assays was studied and assessed in time-lapse series for 40 h in the presence of stimulating epidermal growth factor (EGF) and inhibiting mitomycin c. Therefore, digital holograms were recorded continuously every thirty minutes. Morphological changes including cell thickness, dry mass and tissue density were analyzed by data from quantitative digital holographic phase microscopy. Stimulation of Caco-2 cells with EGF or mitomycin c resulted in significant morphological changes during wound healing compared to control cells. In conclusion, DHM allows accurate, stain-free and continuous multimodal quantitative monitoring of wound healing in vitro and could be a promising new technique for assessment of wound healing.
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Affiliation(s)
- Dominik Bettenworth
- Department of Medicine B, University Hospital Münster, Münster, Germany
- * E-mail: (DB); (BK)
| | - Philipp Lenz
- Department of Medicine B, University Hospital Münster, Münster, Germany
| | | | - Markus Brückner
- Department of Medicine B, University Hospital Münster, Münster, Germany
| | - Steffi Ketelhut
- Center for Biomedical Optics and Photonics, University of Münster, Münster, Germany
- Biomedical Technology Center, University of Münster, Münster, Germany
| | - Dirk Domagk
- Department of Medicine B, University Hospital Münster, Münster, Germany
| | - Björn Kemper
- Center for Biomedical Optics and Photonics, University of Münster, Münster, Germany
- Biomedical Technology Center, University of Münster, Münster, Germany
- * E-mail: (DB); (BK)
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Brückner M, Lenz P, Nowacki TM, Pott F, Foell D, Bettenworth D. Murine endoscopy for in vivo multimodal imaging of carcinogenesis and assessment of intestinal wound healing and inflammation. J Vis Exp 2014. [PMID: 25226434 DOI: 10.3791/51875] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Mouse models are widely used to study pathogenesis of human diseases and to evaluate diagnostic procedures as well as therapeutic interventions preclinically. However, valid assessment of pathological alterations often requires histological analysis, and when performed ex vivo, necessitates death of the animal. Therefore in conventional experimental settings, intra-individual follow-up examinations are rarely possible. Thus, development of murine endoscopy in live mice enables investigators for the first time to both directly visualize the gastrointestinal mucosa and also repeat the procedure to monitor for alterations. Numerous applications for in vivo murine endoscopy exist, including studying intestinal inflammation or wound healing, obtaining mucosal biopsies repeatedly, and to locally administer diagnostic or therapeutic agents using miniature injection catheters. Most recently, molecular imaging has extended diagnostic imaging modalities allowing specific detection of distinct target molecules using specific photoprobes. In conclusion, murine endoscopy has emerged as a novel cutting-edge technology for diagnostic experimental in vivo imaging and may significantly impact on preclinical research in various fields.
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Affiliation(s)
| | - Philipp Lenz
- Department of Medicine B, University Hospital Münster
| | | | | | - Dirk Foell
- Department of Pediatric Rheumatology and Immunology, University Children's Hospital Münster
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Andrade Carvalho A, da Costa PM, Da Silva Souza LG, Lemos TLG, Alves APNN, Pessoa C, de Moraes MO. Inhibition of metastatic potential of B16-F10 melanoma cell line in vivo and in vitro by biflorin. Life Sci 2013; 93:201-7. [DOI: 10.1016/j.lfs.2013.05.018] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2013] [Revised: 05/08/2013] [Accepted: 05/21/2013] [Indexed: 10/26/2022]
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Actions of the Kunitz-type serine protease inhibitor Amblyomin-X on VEGF-A-induced angiogenesis. Toxicon 2012; 60:333-40. [PMID: 22575283 DOI: 10.1016/j.toxicon.2012.04.349] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2012] [Revised: 04/17/2012] [Accepted: 04/24/2012] [Indexed: 11/22/2022]
Abstract
Amblyomin-X is a Kunitz-type serine protease inhibitor (Kunitz-type SPI) designed from the cDNA library of the Amblyomma cajennense tick, which displays in vivo anti-tumor activities. Here, the mechanisms of actions of Amblyomin-X in vascular endothelial growth factor A (VEGF-A)-induced angiogenesis were characterized. Topical application of Amblyomin-X (10 or 100 ng/10 μl; each 48 h) inhibited VEGF-A-induced (10 ng/10 μl; each 48 h) angiogenesis in the dorsal subcutaneous tissue in male Swiss mice. Moreover, similar effect was observed in the VEGF-A-induced angiogenesis in the chicken chorioallantoic membrane (CAM). Additional in vitro assays in t-End cells showed that Amblyomin-X treatment delayed the cell cycle, by maintaining them in G0/G1 phase, and inhibited cell proliferation and adhesion, tube formation and membrane expression of the adhesion molecule platelet-endothelial cell adhesion molecule-1 (PECAM-1), regardless of mRNA synthesis. Together, results herein reveal the role of Kunitz-type SPI on in vivo VEGF-A-induced angiogenesis, by exerting modulatory actions on endothelial cell proliferation and adhesion, especially on membrane expression of PECAM-1. These data provide further mechanisms of actions of Kunitz-type SPI, corroborating their relevance as scientific tools in the design of therapeutic molecules.
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Riahi R, Yang Y, Zhang DD, Wong PK. Advances in Wound-Healing Assays for Probing Collective Cell Migration. ACTA ACUST UNITED AC 2012; 17:59-65. [DOI: 10.1177/2211068211426550] [Citation(s) in RCA: 109] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Murrell M, Kamm R, Matsudaira P. Tension, free space, and cell damage in a microfluidic wound healing assay. PLoS One 2011; 6:e24283. [PMID: 21915305 PMCID: PMC3167843 DOI: 10.1371/journal.pone.0024283] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2011] [Accepted: 08/09/2011] [Indexed: 12/20/2022] Open
Abstract
We use a novel, microfluidics-based technique to deconstruct the classical wound healing scratch assay, decoupling the contribution of free space and cell damage on the migratory dynamics of an epithelial sheet. This method utilizes multiple laminar flows to selectively cleave cells enzymatically, and allows us to present a 'damage free' denudation. We therefore isolate the influence of free space on the onset of sheet migration. First, we observe denudation directly to measure the retraction in the cell sheet that occurs after cell-cell contact is broken, providing direct and quantitative evidence of strong tension within the sheet. We further probe the mechanical integrity of the sheet without denudation, instead using laminar flows to selectively inactivate actomyosin contractility. In both cases, retraction is observed over many cell diameters. We then extend this method and complement the enzymatic denudation with analogies to wounding, including gradients in signals associated with cell damage, such as reactive oxygen species, suspected to play a role in the induction of movement after wounding. These chemical factors are evaluated in combination with the enzymatic cleavage of cells, and are assessed for their influence on the collective migration of a non-abrasively denuded epithelial sheet. We conclude that free space alone is sufficient to induce movement, but this movement is predominantly limited to the leading edge, leaving cells further from the edge less able to move towards the wound. Surprisingly, when coupled with a gradient in ROS to simulate the chemical effects of abrasion however, motility was not restored, but further inhibited.
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Affiliation(s)
- Michael Murrell
- Department of Biological Engineering/Massachusetts Institute of Technology, Cambridge, Massachusetts, United States of America.
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Bettenworth D, Buyse M, Böhm M, Mennigen R, Czorniak I, Kannengiesser K, Brzoska T, Luger TA, Kucharzik T, Domschke W, Maaser C, Lügering A. The tripeptide KdPT protects from intestinal inflammation and maintains intestinal barrier function. THE AMERICAN JOURNAL OF PATHOLOGY 2011; 179:1230-42. [PMID: 21741932 DOI: 10.1016/j.ajpath.2011.05.013] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2010] [Revised: 05/13/2011] [Accepted: 05/23/2011] [Indexed: 12/20/2022]
Abstract
Treatment options for inflammatory bowel disease (IBD) are incompletely helpful, and surgery is often needed. One promising class of future therapeutic agents for IBD is melanocortin-related peptides, which exhibit potent immunomodulatory effects. We investigated KdPT, a tripeptide derivative of the C-terminus of α-melanocyte-stimulating hormone, as an anti-inflammatory small molecule in vivo and in vitro. Intestinal inflammation was studied after oral administration of dextran sodium sulfate and in IL-10 gene-deficient mice. The effects of KdPT on key colonic epithelial cell functions were studied in vitro and in vivo by evaluating proliferation, wound healing, transepithelial resistance, and expression of tight junction proteins. Melanin assays were performed to determine the melanotropic effects of KdPT. KdPT-treated animals showed markedly reduced severity of inflammation in both colitis models. In colonic epithelial cells, KdPT increased proliferation, accelerated closure of wounds, and improved transepithelial electrical resistance after stimulation with interferon-γ/tumor necrosis factor-α. Moreover, treatment with KdPT also prevented the loss of tight junction protein expression and improved barrier function in vivo. KdPT acted independently of IL-1 receptor type I in vivo and did not affect melanogenesis in vitro. KdPT is capable of attenuating the course of experimental colitis in different models and maintains epithelial cell function. Furthermore, KdPT does not induce pigmentation, emphasizing the potential of this small molecule for the future treatment of IBD.
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N-benzyl-5-phenyl-1H-pyrazole-3-carboxamide promotes vascular endothelial cell angiogenesis and migration in the absence of serum and FGF-2. Acta Pharmacol Sin 2011; 32:209-16. [PMID: 21293473 DOI: 10.1038/aps.2010.201] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
AIM To investigate the effect of N-benzyl-5-phenyl-1H-pyrazole-3-carboxamide (BPC) on angiogenesis in human umbilical vein endothelial cells (HUVECs). METHODS Capillary-like tube formation on matrigel and cell migration analyses were performed in the absence of serum and fibroblast growth factor (FGF-2). Reactive oxygen species (ROS) were measured using a fluorescent probe, 2', 7'- dichlorodihydrofluorescein (DCHF). The nitric oxide (NO) production of HUVECs was examined using a NO detection kit. Morphological observation under a phase contrast microscope, a viability assay using 3-[4, 5-dimethylthiazol-2-yl]-2, 5-diphenyl-tetrazolium (MTT) and a lactate dehydrogenase (LDH) activity analysis by a detection kit were performed to evaluate the toxicity of BPC on HUVECs in the presence of serum and FGF-2. The level of hypoxia-inducible factor 1α (HIF-1α) and the release of vascular endothelial growth factor (VEGF) were measured by Western blot and ELISA, respectively. RESULTS In the absence of serum and FGF-2, cells treated with BPC (5-20 μmol/L) rapidly aligned with one another and formed tube-like structures within 12 h. In the presence of serum and FGF-2, cells treated with BPC for 24, 48 and 72 h had no changes in morphology, viability or LDH release compared with the control group. Cell migration in the BPC-treated group was significantly increased compared with the control group. During this process, NO production and ROS level were elevated dramatically, and the levels of HIF-1α and VEGF were increased dependent on the generation of ROS. CONCLUSION BPC most effectively promoted angiogenesis and migration in HUVECs in the absence of FGF-2 and serum.
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Discovery of a pyrazole derivative promoting angiogenesis through modulating reactive oxygen species and interferon-inducible protein 10 levels. Mol Biol Rep 2010; 38:1491-7. [DOI: 10.1007/s11033-010-0256-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2010] [Accepted: 09/02/2010] [Indexed: 01/01/2023]
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Sandoval MJ, Cutini PH, Rauschemberger MB, Massheimer VL. The soyabean isoflavone genistein modulates endothelial cell behaviour. Br J Nutr 2010; 104:171-9. [PMID: 20187999 DOI: 10.1017/s0007114510000413] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
The aim of the present study was to investigate the direct action of the phyto-oestrogen genistein (Gen) on vascular endothelial behaviour, either in the presence or absence of proinflammatory agents. In rat aortic endothelial cell (EC) cultures, 24 h of treatment with Gen significantly increased cell proliferation in a wide range of concentration (0.001-10 nm). This mitogenic action was prevented by the oestrogen receptor (ER) antagonist ICI 182780 or by the presence of the specific NO synthase inhibitor l-nitro-arginine methyl ester. When monocytes adhesion to EC was measured, Gen partially attenuated leucocyte adhesion not only under basal conditions, but also in the presence of bacterial lipopolysaccharides (LPS). The effect of the phyto-oestrogen on the expression of EC adhesion molecules was evaluated. Gen down-regulated the enhancement in mRNA levels of E-selectin, vascular cell adhesion molecule-1 and P-selectin elicited by the proinflammatory agent bacterial LPS. The regulation of EC programmed death induced by the isoflavone was also demonstrated. Incubation with 10 nm Gen prevented DNA fragmentation induced by the apoptosis inductor H2O2. The results presented suggest that Gen would exert a protective effect on vascular endothelium, due to its regulatory action on endothelial proliferation, apoptosis and leucocyte adhesion, events that play a critical role in vascular diseases. The molecular mechanism displayed by the phyto-oestrogen involved the participation of the ER and the activation of the NO pathway.
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Affiliation(s)
- Marisa J Sandoval
- Departamento de Biología, Bioquímica y Farmacia, Cátedra de Bioquímica Clínica II, Universidad Nacional del Sur, San Juan 670, B8000ICN Bahía Blanca, Argentina
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Cutini PH, Massheimer VL. Role of progesterone on the regulation of vascular muscle cells proliferation, migration and apoptosis. Steroids 2010; 75:355-61. [PMID: 20132833 DOI: 10.1016/j.steroids.2010.01.017] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/31/2009] [Revised: 12/18/2009] [Accepted: 01/25/2010] [Indexed: 10/19/2022]
Abstract
The purpose of this study was to investigate the effect of progesterone (Pg) on cellular growth, migration, apoptosis, and the molecular mechanism of action displayed by the steroid. To that end, rat aortic vascular smooth muscle cell (VSMC) cultures were employed. Pg (10nM) significantly increased [(3)H]thymidine incorporation after 24h of treatment. The enhancement in DNA synthesis was blunted in the presence of an antagonist of Pg receptor (RU486 compound). The mitogenic action of the steroid was suppressed by the presence of the compounds PD98059 (MEK inhibitor), chelerythrine (PKC inhibitor), and indomethacin (cyclooxygenase antagonist) suggesting that the stimulation of DNA synthesis involves MAPK, PKC, and cyclooxygenase transduction pathways. The proliferative effect of the hormone depends on the presence of endothelial cells (EC). When muscle cells were incubated with conditioned media obtained of EC treated with Pg, the mitogenic action of the steroid declined. Wounding assays shows that 10nM Pg enhances VSMC migration and motility. The role of the steroid on programmed cell death was measured using DNA fragmentation technique. Four hours of treatment with 10nM Pg enhanced DNA laddering in a similarly extent to the apoptotic effect induced by the apoptogen hydrogen peroxide (H(2)O(2)). In summary the results presented provide evidence that Pg enhances cell proliferation, migration, and apoptosis of VSMC. The modulation of cell growth elicited by the steroid involves integration between genomic and signal transduction pathways activation.
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Affiliation(s)
- Pablo H Cutini
- Cátedra de Bioquímica Clínica II, Departamento de Biología, Bioquímica y Farmacia, Universidad Nacional del Sur, San Juan 670, B8000ICN Bahía Blanca, Argentina
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PKCα-MAPK/ERK-phospholipase A2 signaling is required for human melanoma-enhanced brain endothelial cell proliferation and motility. Microvasc Res 2009; 78:338-57. [DOI: 10.1016/j.mvr.2009.09.001] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2008] [Revised: 07/08/2009] [Accepted: 09/01/2009] [Indexed: 12/28/2022]
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Cutini P, Sellés J, Massheimer V. Cross-talk between rapid and long term effects of progesterone on vascular tissue. J Steroid Biochem Mol Biol 2009; 115:36-43. [PMID: 19429459 DOI: 10.1016/j.jsbmb.2009.02.014] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/06/2008] [Revised: 02/10/2009] [Accepted: 02/12/2009] [Indexed: 02/07/2023]
Abstract
We tested the hypothesis whether; the non-genomic action of progesterone (Pg) on vascular tissue would be associated with hormonal long term effect on the modulation of cell growth. Using rat aortic strips, we showed that the stimulatory effect of Pg on nitric oxide synthesis involved both kinase and phosphatase pathways. The increase in the vasoactive production was prevented by the MAPK inhibitor (PD98059). In addition, preincubation with a phosphatase antagonist potentiated the hormonal effect. Pg increased PKC activity, but the inhibition of PKC did not alter the stimulatory action of the hormone on nitric oxide generation. In endothelial cell cultures (EC), 24h treatment with Pg significantly diminished cell proliferation. This antiproliferative effect was suppressed by the PKC inhibitor chelerythrine (chel) and l-NAME (nitric oxide synthase inhibitor). We also observed that Pg stimulates EC migration. In summary, the present findings provide evidence of an integration of genomic and non-genomic effects in the mechanism of action displayed by Pg in vascular tissue. The fast effects elicited by the hormone implies signal transduction activation required for the regulation of vasoactive production, but also necessary for the modulation of endothelial cells growth.
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Affiliation(s)
- Pablo Cutini
- Cátedra de Bioquímica Clínica II, Departamento de Biología, Bioquímica y Farmacia, Universidad Nacional del Sur, San Juan, Bahía Blanca, Argentina
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Christgen M, Bruchhardt H, Ballmaier M, Krech T, Länger F, Kreipe H, Lehmann U. KAI1/CD82 is a novel target of estrogen receptor-mediated gene repression and downregulated in primary human breast cancer. Int J Cancer 2008; 123:2239-46. [PMID: 18712725 DOI: 10.1002/ijc.23806] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
The cell-surface glycoprotein KAI1 suppresses tumor growth and metastasis in various animal models. Downregulation of KAI1 has been implicated in the progression of cancer. However, the mechanisms of KAI1 inactivation are poorly understood. This is the first study that investigates expression and regulation of KAI1 in human breast cancer. KAI1 expression was analyzed on custom-made tissue microarrays comprising 209 well-characterized breast cancers and normal mammary gland tissue. Strong KAI1 immunoreactivity was observed throughout the normal mammary gland epithelium. In breast cancer tissue, KAI1 immunoreactivity was lost in 161/209 (77%) cases. Strikingly, KAI1 was preferentially lost in estrogen receptor (ER)-positive breast cancers (p < 0.001). This was validated by real-time RT-PCR analyses showing a 7.5-fold downregulation of KAI1 mRNA in ER-positive relative to ER-negative tumors (p = 0.028). Notably, this was also corroborated by Affymetrix microarray expression data of an independent cohort of 49 breast cancers. Class comparison analysis identified KAI1 as downregulated in ER-positive tumors. Subsequently, human breast cancer cell lines were employed to test a potential role of ER-activity in the downregulation of KAI1, as suggested by our expression analyses. Exposure of ER-positive breast cancer cells to fulvestrant, a clinically approved ER-antagonist that reverses ER-mediated gene repression, induced a significant upregulation of KAI1 and inhibited cell proliferation as well as migration. In summary, we demonstrate for the first time that KAI1 is a target of ER-mediated gene-repression, and thus, it is downregulated in ER-positive breast cancer. Importantly, KAI1 might be reinducible by endocrine therapy with ER-antagonists in patients suffering from ER-positive breast cancer.
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The direct action of estrone on vascular tissue involves genomic and non-genomic actions. Life Sci 2008; 82:115-23. [DOI: 10.1016/j.lfs.2007.10.020] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2007] [Revised: 10/11/2007] [Accepted: 10/22/2007] [Indexed: 11/15/2022]
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Büth H, Luigi Buttigieg P, Ostafe R, Rehders M, Dannenmann SR, Schaschke N, Stark HJ, Boukamp P, Brix K. Cathepsin B is essential for regeneration of scratch-wounded normal human epidermal keratinocytes. Eur J Cell Biol 2007; 86:747-61. [PMID: 17651862 DOI: 10.1016/j.ejcb.2007.03.009] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2006] [Revised: 03/12/2007] [Accepted: 03/13/2007] [Indexed: 02/08/2023] Open
Abstract
Migration, proliferation and differentiation of keratinocytes are important processes during tissue regeneration and wound healing of the skin. Here, we focussed on proteases that contribute to extracellular matrix (ECM) remodeling as a prerequisite of keratinocyte migration. In particular, we assessed the significance of the mammalian cysteine peptidase cathepsin B for human keratinocytes during regeneration from scratch wounding. We describe the construction of a scratch apparatus that allows applying scratches of defined length, width and depth to cultured cells in a reproducible fashion. The rationale for our approach derived from our previous work where we have shown that HaCaT keratinocytes secrete cathepsin B into the extracellular space during spontaneous and induced migration. Here, we observed rapid removal of type IV collagen from underneath lamellipodial extensions of keratinocytes at the advancing fronts of regenerating monolayers, indicating that proteolytic ECM remodeling starts upon initiation of keratinocyte migration. Furthermore, we verified our previous results with HaCaT cells by using normal human epidermal keratinocytes (NHEK) and show that non-cell-permeant cathepsin B-specific inhibitors delayed full regeneration of the monolayers from scratch wounding in both cell systems, HaCaT and NHEK. Application of a single dose of cathepsin B inhibitor directly after scratch wounding of keratinocytes demonstrated that cathepsin B is essential during initial stages of wound healing, while its contribution to the subsequent processes of proliferation and differentiation of keratinocytes was of less significance. This notion was supported by our observation that the cathepsin B inhibitors used in this study did not affect proliferation rates of keratinocytes of regenerating cultures. Thus, we conclude that cathepsin B is indeed involved in ECM remodeling after its secretion from migrating keratinocytes. Cathepsin B might directly cleave ECM constituents or it may initiate proteolytic cascades that involve other proteases with the ability to degrade ECM components. Because cathepsin B is important for enabling migration of both, HaCaT cells and NHEK, our results support the notion that HaCaT keratinocytes represent an excellent cell culture model for analysis of human epidermal skin keratinocyte migration.
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Affiliation(s)
- Heiko Büth
- School of Engineering and Science, Jacobs University Bremen (formerly International University Bremen), Campus Ring 6, Research II-107, D-28759 Bremen, Germany
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Abstract
In an investigation of endogenous regulation of epithelial interaction, it was found that cultured embryo fibroblasts release an activity which causes loss of junctional attachment and separation of contiguous epithelial cells. This activity was originally observed in freshly cultured human mammary cells, but the MDCK cell line is also sensitive and has been used to develop an assay of activity. The activity is due to a protein that is heat-labile and sensitive to reducing agents and has a relative molecular mass of approximately 50,000 by gel filtration in the presence of 6 M-guanidinium hydrochloride or 8 M-urea. We term the agent 'epithelial scatter factor'. It is not known whether the factor acts directly or indirectly on junctional components. Besides its effect on cell relationships, the factor causes a change in cell morphology and local movement. In investigations so far, the scatter factor has been released only by fibroblasts of embryonic origin. Some but not all epithelial cells are sensitive; other cell types are not. The factor may be involved in morphogenetic changes involving the epithelium in embryonic or adult life. There is as yet no evidence for a role in the spread of tumour cells.
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Jensen LDE, Hansen AJ, Lundbaek JA. Regulation of endothelial cell migration by amphiphiles—are changes in cell membrane physical properties involved? Angiogenesis 2007; 10:13-22. [PMID: 17265099 DOI: 10.1007/s10456-006-9060-y] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2006] [Accepted: 12/11/2006] [Indexed: 12/24/2022]
Abstract
Endothelial cell (EC) migration is an integral part of angiogenesis and a prerequisite for malignant tumor growth. Recent studies suggest that amphiphilic compounds can regulate migration of bovine aortic ECs by altering the physical properties of the cell membrane lipid bilayers. A number of structurally different amphiphiles thus regulate the migration in quantitative correlation with their effects on the plasma membrane microviscosity. Many amphiphiles that affect EC migration and angiogenesis alter the physical properties of lipid bilayers, suggesting that such a regulatory mechanism may be of general importance. To investigate this notion, we studied the effects of lysophospholipids that inhibit migration of bovine aortic ECs and decrease cell membrane microviscosity, and of other amphiphiles that decrease membrane microviscosity (Triton X-100, octyl-beta-glucoside, arachidonic acid, docosahexaenoic acid, ETYA, capsaicin) on the migration of porcine aortic ECs. We further studied whether the enzyme secretory phospholipase A(2) (sPLA(2)) would affect migration in accordance with the changes in membrane microviscosity induced by its hydrolysis products lysophospholipids and polyunsaturated fatty acids. Arachidonic acid, at low concentrations, promoted cell migration by a mechanism involving metabolic products of this compound. Apart from this effect, all the amphiphiles, as well as sPLA(2), inhibited cell migration. A semi-quantitative analysis found a similar correlation between the effects on migration and on lipid bilayer stiffness measured using gramicidin channels as molecular force transducers. These results suggest that changes in cell membrane physical properties may generally contribute to the effects of amphiphiles on EC migration.
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Affiliation(s)
- Lasse D E Jensen
- Department of Cancer and Immunobiology, Novo Nordisk A/S, Novo Nordisk Park, Måløv, Denmark
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Meloni MA, Galleri G, Pippia P, Cogoli-Greuter M. Cytoskeleton changes and impaired motility of monocytes at modelled low gravity. PROTOPLASMA 2006; 229:243-9. [PMID: 17180508 DOI: 10.1007/s00709-006-0210-2] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2005] [Accepted: 11/02/2005] [Indexed: 05/13/2023]
Abstract
Investigations performed in space have shown that gravity changes affect important cellular mechanisms like proliferation, differentiation, genetic expression, cytoskeletal architecture, and motility in lymphocytes, monocytes, and other mammalian cells. In particular, a dramatic depression of the mitogenic in vitro activation of human peripheral blood lymphocytes was observed at low gravity. The hypothesis of the present work is that a reduced interaction between T lymphocytes and monocytes, essential for the second signalling pathway, might be one of the reasons for the observed depression of the in vitro activation of human lymphocytes. Cell motility and with it a continuous rearrangement of the cytoskeletal network within the cell is essential for cell-to-cell contacts. Whereas nonactivated lymphocytes in suspension are highly motile at low gravity, no data are available so far on the motility of adherent monocytes. It thus can be argued that impaired monocyte locomotion and cytoskeletal changes could be responsible for a reduced interaction of monocytes with T lymphocytes. In this study, the locomotion ability of J-111 cells, an adherent monocyte cell line, attached to colloidal gold particles on coverslips and exposed to modelled low gravity in the random positioning machine was found to be severely reduced compared with that of controls and the structures of actin, tubulin, and vinculin were affected.
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Affiliation(s)
- M A Meloni
- Dipartimento di Scienze Fisiologiche, Biochimiche e Cellulari, Universita di Sassari, Sassari, Italy
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Ho SB, Dvorak LA, Moor RE, Jacobson AC, Frey MR, Corredor J, Polk DB, Shekels LL. Cysteine-rich domains of muc3 intestinal mucin promote cell migration, inhibit apoptosis, and accelerate wound healing. Gastroenterology 2006; 131:1501-17. [PMID: 17101324 DOI: 10.1053/j.gastro.2006.09.006] [Citation(s) in RCA: 85] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/20/2005] [Accepted: 07/19/2006] [Indexed: 12/12/2022]
Abstract
BACKGROUND & AIMS Muc3 intestinal mucin contains an extracellular cysteine-rich domain with 2 epidermal growth factor (EGF)-like motifs. The aim of this study was to determine the functional properties of Muc3 proteins. METHODS Glutathione S-transferase-fusion proteins containing both Muc3 EGF-like domains (m3EGF1,2) or truncated versions (m3EGF1 and m3EGF2) were purified from Escherichia coli. Mouse colon (young adult mouse colon) and human A431 and LoVo cells were examined for migration and tyrosine phosphorylation in response to recombinant proteins. LoVo cells were transfected with a human MUC3A transmembrane-EGF1,2 construct and a stable clone was isolated (LhM3c14). Endogenous MUC3A in LoVo was inhibited by specific small interfering RNA transfection. Apoptosis was quantitated by nuclear morphology or terminal deoxynucleotidyl transferase-mediated deoxyuridine triphosphate biotin nick-end labeling assay. Colitis was induced in mice by oral 5% dextran sodium sulfate or rectal 5% acetic acid, followed by enema treatments. RESULTS m3EGF1,2 stimulated cell migration in all cell lines, but did not induce proliferation. Migration was inhibited by a tyrosine phosphorylation inhibitor, genistein, but not by the EGF receptor inhibitor, tyrphostin (AG1478). Inhibition of endogenous MUC3A in LoVo reduced baseline migration. Tyrosine phosphorylation of ErbB receptors was not observed after treatment of cells with m3EGF1,2. LoVo cells pretreated with m3EGF1,2 and transfected LhM3c14 cells showed reduced apoptosis in response to tumor necrosis factor alpha or Fas-receptor stimulation. Administration of m3EGF1,2 per rectum significantly reduced mucosal ulceration and apoptosis in experimental acute colitis. Truncated proteins m3EGF1 and m3EGF2 had no effect. CONCLUSIONS The Muc3 mucin cysteine-rich domain plays an active role in epithelial restitution, and represents a potential novel therapeutic agent for intestinal wound healing.
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Affiliation(s)
- Samuel B Ho
- Department of Medicine, Veterans Affairs Medical Center and University of Minnesota, Minneapolis, Minnesota, USA.
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Voisard R, Alan M, Müller LV, Baur R, Hombach V. Effects of abciximab on key pattern of human coronary restenosis in vitro: impact of the SI/MPL-ratio. BMC Cardiovasc Disord 2006; 6:14. [PMID: 16595000 PMCID: PMC1475639 DOI: 10.1186/1471-2261-6-14] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2005] [Accepted: 04/04/2006] [Indexed: 11/10/2022] Open
Abstract
Background The significant reduction of angiographic restenosis rates in the ISAR-SWEET study (intracoronary stenting and antithrombotic regimen: is abciximab a superior way to eliminate elevated thrombotic risk in diabetes) raises the question of whether abciximab acts on clopidogrel-independent mechanisms in suppressing neointimal hyperplasia. The current study investigates the direct effect of abciximab on ICAM-1 expression, migration and proliferation. Methods ICAM-1: Part I of the study investigates in cytoflow studies the effect of abciximab (0.0002, 0.002, 0.02, 0.2, 2.0, and 20.0 μg/ml) on TNF-α induced expression of intercellular adhesion molecule 1 (ICAM-1). Migration: Part II of the study explored the effect of abciximab (0.0002, 0.002, 0.02, 0.2, 2.0, and 20.0 μg/ml) on migration of HCMSMC over a period of 24 h. Proliferation: Part III of the study investigated the effect of abciximab (0.0002, 0.002, 0.02, 0.2, 2.0, and 20.0 μg/ml) on proliferation of HUVEC, HCAEC, and HCMSMC after an incubation period of 5 days. Results ICAM-1: In human venous endothelial cells (HUVEC), human coronary endothelial cells (HCAEC) and human coronary medial smooth muscle cells (HCMSMC) no inhibitory or stimulatory effect on expression of ICAM-1 was detected. Migration: After incubation of HCMSMC with abciximab in concentrations of 0.0002 – 2 μg/ml a stimulatory effect on cell migration was detected, statistical significance was achieved after incubation with 0.002 μg/ml (p < 0.05), 0.002 μg/ml (p < 0.001), and 0.2 μg/ml (p < 0.05). Proliferation: Small but statistically significant antiproliferative effects of abciximab were detected after incubation of HUVEC (0.02 and 2.0 μg/ml; p = 0.01 and p < 0.01), HCAEC (2.0 and 20.0 μg/ml; p < 0.05 and p < 0,01), and HCMSMC (2.0 and 20.0 μg/ml; p < 0.05 and p < 0.05). The significant inhibition (SI) of cell proliferation found in HCAEC and HCMSMC was achieved with drug concentrations more than 10 times beyond the maximal plasma level (MPL), resulting in a SI/MPL-ratio > 1. Conclusion Thus, the anti-restenotic effects of systemically administered abciximab reported in the ISAR-SWEET-study were not caused by a direct inhibitory effect on ICAM-1 expression, migration or proliferation.
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Affiliation(s)
- Rainer Voisard
- Department of Internal Medicine II – Cardiology, University of Ulm, Robert-Kochstrasse 8, D-89081 Ulm, (Rainer Voisard, M.D., Mustafa Alan, Regine Baur, Vinzenz Hombach, M.D.), Germany
| | - Mustafa Alan
- Department of Internal Medicine II – Cardiology, University of Ulm, Robert-Kochstrasse 8, D-89081 Ulm, (Rainer Voisard, M.D., Mustafa Alan, Regine Baur, Vinzenz Hombach, M.D.), Germany
| | - Lutz von Müller
- Department of Virology, Institute of Mikrobiology and Immunology, University of Ulm, Robert-Kochstrasse 8, D-89081 Ulm, (Lutz von Müller, M.D.), Germany
| | - Regine Baur
- Department of Internal Medicine II – Cardiology, University of Ulm, Robert-Kochstrasse 8, D-89081 Ulm, (Rainer Voisard, M.D., Mustafa Alan, Regine Baur, Vinzenz Hombach, M.D.), Germany
| | - Vinzenz Hombach
- Department of Internal Medicine II – Cardiology, University of Ulm, Robert-Kochstrasse 8, D-89081 Ulm, (Rainer Voisard, M.D., Mustafa Alan, Regine Baur, Vinzenz Hombach, M.D.), Germany
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Büth H, Wolters B, Hartwig B, Meier-Bornheim R, Veith H, Hansen M, Sommerhoff CP, Schaschke N, Machleidt W, Fusenig NE, Boukamp P, Brix K. HaCaT keratinocytes secrete lysosomal cysteine proteinases during migration. Eur J Cell Biol 2005; 83:781-95. [PMID: 15679122 DOI: 10.1078/0171-9335-00428] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
Cathepsin B, a lysosomal cysteine proteinase, was detected within vesicles of cellular protrusions forming cell-cell contact sites between keratinocytes of the stratum spinosum of human skin. This observation suggested the possibility that secretion of the protease into the pericellular spaces could be involved in the dissociation of cell-cell contacts to enable intraepidermal keratinocyte migration. To determine whether cathepsin B is indeed secreted from migrating keratinocytes, we first used subconfluent HaCaT cells as a culture model to study spontaneous keratinocyte migration. A cathepsin B-specific fluorescent affinity label proved the association of mature cathepsin B with the surfaces of HaCaT cells at the leading edges of growing cells. Second, we used scratch-wounds of confluent HaCaT monolayers as a model of induced keratinocyte migration. Cathepsin B was detected within lysosomes, i.e. vesicles within the perinuclear region of non-wounded cells. Expression of cathepsin B was up-regulated and cathepsin B-positive vesicles showed a redistribution from perinuclear to peripheral regions of keratinocytes at the wound margins within 4 h after wounding. Enzyme cytochemistry further showed that cell surface-associated cathepsin B was proteolytically active at the leading fronts of migrating keratinocytes. In addition, increased amounts of mature forms of cathepsin B were detected within the conditioned media of HaCaT cells during the first 4 h after scratch-wounding. In contrast, and as a control, the activity of the cytosolic enzyme lactate dehydrogenase was not significantly higher in media of wounded cells as compared with non-wounded controls, arguing for a specific induction of cathepsin B secretion upon wounding and migration of the cells. This was further substantiated by applying various cathepsin B-specific inhibitors after wounding. These experiments showed that the migration ability of keratinocytes was reduced due to the blockage of functional cathepsin B. Thus, our results strongly suggest that cell surface-associated cathepsin B is a protease that contributes to the remodelling of the extracellular matrix and thereby promotes keratinocyte migration during wound healing.
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Affiliation(s)
- Heiko Büth
- School of Engineering and Science, International University Bremen, Bremen, Germany
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Wang T, Xia D, Li N, Wang C, Chen T, Wan T, Chen G, Cao X. Bone marrow stromal cell-derived growth inhibitor inhibits growth and migration of breast cancer cells via induction of cell cycle arrest and apoptosis. J Biol Chem 2004; 280:4374-82. [PMID: 15569677 DOI: 10.1074/jbc.m408708200] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
Genes encoding growth-inhibitory proteins are postulated to be candidate tumor suppressors. The identification of such proteins may benefit the early diagnosis and therapy of tumors. Here we report the cloning and functional characterization of a novel human bone marrow stromal cell (BMSC)-derived growth inhibitor (BDGI) by large scale random sequencing of a human BMSC cDNA library. Human BDGI cDNA encodes a 477-amino acid residue protein that shares high homology with rat and mouse pregnancy-induced growth inhibitors. The C-terminal of BDGI is identical to a novel human pregnancy-induced growth inhibitor, OKL38. BDGI is also closely related to many other eukaryotic proteins, which together form a novel and highly conserved family of BDGI-like proteins. BDGI overexpression inhibits the proliferation, decreases anchorage-dependent growth, and reduces migration of MCF-7 human breast cancer cells, whereas down-regulation of BDGI expression promotes the proliferation of MCF-7 and HeLa cervix epitheloid carcinoma cells. Interestingly, the inhibitory effect of BDGI on MCF-7 cells is more potent than that of OKL38. We demonstrate that BDGI induces cell cycle arrest in S phase and subsequent apoptosis of MCF-7 cells, which is likely to account for the antiproliferative effects of BDGI. This process may involve up-regulation of p27Kip1 and down-regulation of cyclin A, Bcl-2, and Bcl-xL. The inhibitory effect of BDGI on cell proliferation and the induction of apoptosis were also observed in A549 lung cancer cells but not HeLa cells. These results indicate that BDGI might be a growth inhibitor for human tumor cells, especially breast cancer cells, possibly contributing to the development of new therapeutic strategies for breast cancer.
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Affiliation(s)
- Tao Wang
- Institute of Immunology, Zhejiang University, Hangzhou 310031, China and Institute of Immunology, Second Military Medical University, Shanghai 200433, China
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Bayes-Genis A, Schwartz RS, Bale LK, Conover CA. Effects of insulin-like growth factor-I on cultured human coronary artery smooth muscle cells. Growth Horm IGF Res 2003; 13:246-253. [PMID: 12932745 DOI: 10.1016/s1096-6374(03)00013-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
The growth-promoting effects of insulin-like growth factor-I (IGF-I) appear to be different in vascular smooth muscle cells from various segments of the arterial tree. Little information exists on human coronary artery smooth muscle cells (CoSMC), the primary elements of coronary atherosclerosis and post-angioplasty restenosis. In this study we determined the effects of IGF-I on cultured human CoSMC. Type I IGF receptors (IGF-R) were present on CoSMC as assessed by affinity cross-linking of 125I-IGF-I to monolayer cultures. IGF-I was a weak mitogen, 1.5-fold increase in [3H]thymidine incorporation, for CoSMC. However, IGF-I had a potent motility effect on CoSMC with a 314+/-12% increase in cell migration (P<0.001), comparable to that of 5% FBS. IGF-I-stimulated motility was partially inhibited by alphaIR-3, a specific IGF-R inhibitor (P<0.05). Addition of kistrin, a disintegrin, or LM609, a specific alpha(V)beta(3) integrin neutralizing antibody, abolished IGF-I-stimulated migration (P<0.001). This study indicates that IGF-I is a potent motility agent for human CoSMC via the alpha(V)beta(3) integrin receptor, but exerts little mitogenic effect. Because CoSMC migration plays a crucial role in atherosclerosis and restenosis, IGF-I blockade has the potential to limit lumen reduction.
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MESH Headings
- Cell Movement
- Cells, Cultured
- Coronary Vessels/cytology
- Humans
- Insulin-Like Growth Factor I/pharmacology
- Insulin-Like Growth Factor I/physiology
- Muscle, Smooth, Vascular/cytology
- Muscle, Smooth, Vascular/drug effects
- Muscle, Smooth, Vascular/physiology
- Myocytes, Smooth Muscle/cytology
- Myocytes, Smooth Muscle/drug effects
- Receptor, IGF Type 1/metabolism
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Affiliation(s)
- Antoni Bayes-Genis
- Division of Cardiovascular Diseases and Endocrine Research Unit , Mayo Clinic and Foundation, 200 First Street SW, 5-194 Joseph, Rochester, MN 55905, USA
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Kazarian T, Jabbar AA, Wen FQ, Patel DA, Valentino LA. Gangliosides regulate tumor cell adhesion to collagen. Clin Exp Metastasis 2003; 20:311-9. [PMID: 12856718 DOI: 10.1023/a:1024021707604] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
The ability of tumor cells to adhere to extracellular matrix proteins is critical for migration and invasion. The factors that regulate tumor cell adhesion are poorly characterized. Gangliosides promote platelet adhesion and may also play a role in the adhesion of other cell types. We hypothesized that pharmacological depletion of membrane gangliosides from adherent cells would abrogate adhesion to collagen and promote migration and invasion. To test these hypotheses, LA-N1 neuroblastoma cells, which avidly adhere to collagen and are rich with membrane gangliosides (43.69 nmol/10(8) cells), were cultured in the presence of D-threo-1-phenyl-2-decanoylamino-3-morpholino-1-propanol-HCl. Endogenous gangliosides were reduced by 98% (0.76 nmol/10(8) cells) and adhesion to collagen decreased by 67%. There were no changes in cell morphology, viability, proliferation rate or apoptosis. Pre-incubation of ganglioside-depleted cells in conditioned medium from control cells restored adhesion to collagen (0.45 +/- 0.002), comparable to that of control cells (0.49 +/- 0.035). Similarly, pre-incubation of ganglioside-depleted cells with purified GD2 completely restored adhesion in a concentration-dependent manner. When LA-N1 cells were cultured with retinoic acid, a biological response modifier known to increase endogenous gangliosides, adhesion to collagen increased. Next, we questioned whether changes in adhesion would be reflected as changes in migration and invasion. Cells depleted of endogenous cellular gangliosides migrated more than control cells. Finally, control cells replete with their endogenous gangliosides demonstrated less invasive potential than control cells. The data demonstrate that endogenous tumor gangliosides increase neuroblastoma cell adhesion to collagen and reduce migration and invasion in vitro.
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Affiliation(s)
- Tamara Kazarian
- Department of Pediatrics, Rush Children's Hospital, Rush University, Chicago, Illinois 60612, USA
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Darmoul D, Gratio V, Devaud H, Lehy T, Laburthe M. Aberrant expression and activation of the thrombin receptor protease-activated receptor-1 induces cell proliferation and motility in human colon cancer cells. THE AMERICAN JOURNAL OF PATHOLOGY 2003; 162:1503-13. [PMID: 12707033 PMCID: PMC1851194 DOI: 10.1016/s0002-9440(10)64283-6] [Citation(s) in RCA: 143] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
The traditional view on the role of serine proteases in tumor biology has changed with the recent discovery of a family of protease-activated receptors (PARs). In this study we explored the expression and functional role of the thrombin receptor PAR-1 in human colon cancer cells. Reverse transcriptase-polymerase chain reaction analysis showed that PAR-1 mRNAs are present in 11 of 14 human colon cancer cell lines tested but not in normal human colonic epithelial cells. This is in line with the immunolocalization of PAR-1 in human colon tumors and its absence in normal human colonic mucosa. The functional significance of the aberrant expression of PAR-1 in colon cancer cells was then investigated. We found that 1) a prompt increase in intracellular calcium concentration was observed on thrombin (10 nmol/L) or PAR-1 agonist AP1 (100 micro mol/L) challenge of HT29 cells; 2) HT29 quiescent cells treated with thrombin (0.01 to 20 nmol/L) or AP1 (1 to 300 micro mol/L) exhibited dramatic mitogenic responses (3.5-fold increase in cell number). Proliferative effects of thrombin or AP1 were also observed in other colon cancer cell lines expressing PAR-1. This effect was reversed by the MEK inhibitor PD98059 in consonance with the ability of thrombin or AP1 to induce phosphorylation of p42/p44 extracellular-regulated protein kinases. 3) PAR-1 activation by thrombin or AP1 led to a two-fold increase in cell motility of wounded HT29-D4. Our results demonstrate for the first time the aberrant expression of the functional thrombin receptor PAR-1 in colon cancers and its important involvement in cell proliferation and motility. Thrombin should now be considered as a growth factor for human colon cancer.
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Affiliation(s)
- Dalila Darmoul
- Neuroendocrinologie et Biologie Cellulaire Digestives, INSERM U410, Institut National de la Santé et de la Recherche Médicale, Paris, France.
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43
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Katz RW, Teng SY, Thomas S, Landesberg R. Paracrine activation of extracellular signal-regulated kinase in a simple in vitro model of wounded osteoblasts. Bone 2002; 31:288-95. [PMID: 12151081 DOI: 10.1016/s8756-3282(02)00824-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The immediate signal-transduction response of osteoblasts to acute trauma is poorly characterized. We have developed a simple in vitro model for osteoblast trauma to investigate aspects of the molecular mechanisms of wound healing in bone. Herein we report the specific, rapid, and transient phosphorylation of extracellular signal-regulated kinase (ERK) 1 and 2 in osteoblasts as a response to disruption ("wounding") of a confluent monolayer. The mitogen-activated protein kinase (MAPK) cascades of p38 and stress-activated protein kinase/c-jun N-terminal kinase (SAPK/JNK) were not activated by this perturbation. The response to wounding was equivalent to the activation of ERK by the addition of exogenous growth factors, and the perturbation-dependent phosphorylation of ERK can be suppressed by an inhibitor of heparin-binding growth factors. Conditioned media from wounded monolayers can induce the phosphorylation of ERK in unperturbed monolayers. Using immunohistochemistry, it was demonstrated that the cells with increased levels of phosphorylated ERK were not localized to the wound edges. These results indicate that ERK activation is the result of an autocrine/paracrine response by osteoblasts to trauma. We speculate that osteoblasts respond to trauma with the release of soluble factors as part of an autocrine/paracrine modulation of the wound-healing process in bone.
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Affiliation(s)
- R W Katz
- Division of Oral Biology, School of Dental and Oral Surgery, Columbia University, New York, NY 10032, USA.
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Kim HH, Ha HJ, Kim SO, Ki SK, Yoo SE, Hong KW. KR 31372, a benzopyran derivative, inhibits oxidized LDL-stimulated proliferation and migration of vascular smooth muscle cells. Fundam Clin Pharmacol 2000; 14:469-76. [PMID: 11129087 DOI: 10.1111/j.1472-8206.2000.tb00429.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
KR 31372 is a benzopyran derivative. Both [3H]thymidine incorporation and migrations (chemotactic and wound-edge) of cultured smooth muscle cells (SMCs) were greatly stimulated by oxidized low-density lipoprotein (LDL). These effects were significantly suppressed by KR 31372 (10(7) - 10(6) M) and PDGF-BB antibody (10(8) - 10(6) M). Preincubation with KR 31372 led to a decrease in the synthesis of PDGF-BB-like immunoreactivity (PDGF-BB-LI) that had been stimulated by oxidized LDL. Otherwise, KR 31372 and probucol strongly inhibited the production of thiobarbituric acid reactive substances (TBARS) caused by the incubation of LDL with Cu2+ ion, and significantly reduced the intracellular oxidative stress when stimulated with H,O2. Taken together, it is suggested that KR 31372 may inhibit the oxidized LDL-stimulated syntheses of DNA and PDGF-BB, and migration of the SMCs, in part, via the antioxidant activity.
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MESH Headings
- Animals
- Anticholesteremic Agents/pharmacology
- Antioxidants/pharmacology
- Aorta/cytology
- Aorta/drug effects
- Becaplermin
- Benzopyrans/pharmacology
- Cell Division/drug effects
- Cell Movement/drug effects
- Cells, Cultured
- DNA/biosynthesis
- DNA/drug effects
- Drug Interactions
- Humans
- Lipoproteins, LDL/pharmacology
- Male
- Muscle, Smooth, Vascular/cytology
- Muscle, Smooth, Vascular/drug effects
- Muscle, Smooth, Vascular/metabolism
- Muscle, Smooth, Vascular/physiology
- Platelet-Derived Growth Factor/metabolism
- Probucol/pharmacology
- Proto-Oncogene Proteins c-sis
- Rats
- Rats, Inbred WKY
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Affiliation(s)
- H H Kim
- Department of Pharmacology, College of Medicine, Pusan National University, South Korea
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Gottrup F, Agren MS, Karlsmark T. Models for use in wound healing research: a survey focusing on in vitro and in vivo adult soft tissue. Wound Repair Regen 2000; 8:83-96. [PMID: 10810034 DOI: 10.1046/j.1524-475x.2000.00083.x] [Citation(s) in RCA: 123] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Many different factors must be considered before selecting a wound healing model to use for a specific study. A wide variety of models have been developed that examine different aspects of the repair response, both in vitro and in vivo. In this review article, we focus on those systems that are most widely used for studies on adult soft tissue healing. Advantages and disadvantages of each are discussed, along with relevant background information to help guide decision-making.
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Affiliation(s)
- F Gottrup
- Copenhagen Wound Healing Center, Bispebjerg University Hospital, Copenhagen, Denmark.
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Soubeyran P, André F, Lissitzky JC, Mallo GV, Moucadel V, Roccabianca M, Rechreche H, Marvaldi J, Dikic I, Dagorn JC, Iovanna JL. Cdx1 promotes differentiation in a rat intestinal epithelial cell line. Gastroenterology 1999; 117:1326-38. [PMID: 10579974 DOI: 10.1016/s0016-5085(99)70283-0] [Citation(s) in RCA: 89] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
BACKGROUND & AIMS Homeobox genes are involved in establishing and maintaining differentiated patterns in adult tissues. Cdx1 might carry out that function in the intestinal epithelium because its expression is specific to that tissue and increases during development. METHODS Cdx1 expression was induced in IEC-6 intestinal epithelial cells by stable transfection, and subsequent changes in cell growth, resistance to apoptosis, migration, and differentiation were monitored. RESULTS Compared with control, IEC-6/Cdx1 cells proliferated more rapidly, were more resistant to apoptosis, and migrated 3-4 times faster, as shown by an in vitro wound assay. IEC-6/Cdx1 cells in culture formed multilayers. Morphology of the top layer was similar to that of columnar epithelium, with cells showing typical features of differentiated enterocytes, including complex junctions and well-developed microvilli with glycocalix. Expression of 2 markers of enterocyte differentiation, aminopeptidase N and villin, was induced in IEC-6/Cdx1 cells. Aminopeptidase N was targeted to the basolateral membrane, and villin was localized to the cytoplasm. Actin filaments, which were mostly present in transcytoplasmic stress fibers in control cells, were redistributed to the cortex in Cdx1-transfected cells. CONCLUSIONS Cdx1 expression in IEC-6 cells induces phenotypic changes characteristic of differentiating enterocytes, suggesting an important role for Cdx1 in the transition from stem cells to proliferating/transit cells.
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Affiliation(s)
- P Soubeyran
- INSERM Unité 315, Laboratoire de Physiologie et Pathologie Digestives, Marseille, France
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Kim HH, Yoo SE, Lee WS, Rhim BY, Hong KW. SKP-450 inhibits migration and DNA synthesis stimulated by oxidized low density lipoprotein in smooth muscle cells. Eur J Pharmacol 1999; 383:373-9. [PMID: 10594331 DOI: 10.1016/s0014-2999(99)00552-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
This study was carried out to examine the inhibitory effects of SKP-450 (2-[2"(1", 3"-dioxolone)-2-methyl]-4-(2'-oxo-1'-pyrrolidinyl)-6-nitro-2H-1-be nzo pyran), a potassium channel opener, on the proliferation and migration stimulated by oxidized low density lipoprotein (LDL) of cultured smooth muscle cells of Wistar Kyoto rat aorta. SKP-450 (10(-7) and 10(-6) M) as well as probucol (10(-7)-10(-5) M) reduced the production of thiobarbituric acid reactive substances from LDL submitted to CuSO(4) (10 microM). The increased [3H]thymidine incorporation and migration (chemotactic and wound-edge) of the cultured smooth muscle cells in association with increased production of platelet-derived growth factor (PDGF)-BB-like immunoreactivity stimulated by oxidized LDL were significantly reduced by SKP-450 (10(-7)-10(-6) M). Inhibition by SKP-450 of the oxidized LDL-stimulated [3H]thymidine incorporation was antagonized by iberiotoxin (10(-7) M), but not by glibenclamide (10(-6) M), suggestive of mediation of Ca(2+)-activated K(+) channel opening in the action of SKP-450. Taken together, SKP-450 inhibited the proliferation and migration of the smooth muscle cells as well as PDGF production stimulated by oxidized LDL, accompanying with its antiperoxidative action.
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Affiliation(s)
- H H Kim
- Department of Pharmacology, College of Medicine, Pusan National University, Pusan, South Korea
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48
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Cohly HH, Stephens JW, Angel MF, Johnson JC, Markov AK. The role of fructose-1,6-diphosphate in cell migration and proliferation in an in vitro xenograft blood vessel model of vascular wound healing. In Vitro Cell Dev Biol Anim 1999; 35:510-4. [PMID: 10548432 DOI: 10.1007/s11626-999-0061-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Both smooth muscle cells and endothelial cells play an important role in vascular wound healing. To elucidate the role of fructose-1,6-diphosphate, cell proliferation and cell migration studies were performed with human endothelial cells and rat smooth muscle cells. To mimic blood vessels, endothelial and smooth muscle cells were used in 1:10, 1:5, and 1:1 concentrations, respectively, mimicking large-, mid-, and capillary-sized blood vessels. Cell migration was studied with fetal bovine serum-starved cells. For cell proliferation assay, cells were plated at 30-50% confluency and then starved. The cells were incubated for 48 h with fructose-1,6-diphosphate at (per ml) 10 mg, 1 mg, 500 microg, 250 microg, 100 microg, and 10 microg, pulsed with tritiated-thymidine and incubated with 1 N NaOH for 30 min at room temperature, harvested, and counted. For migration assay, confluent cells were starved, wounded, and incubated for 24 h with same concentrations of fructose-1,6-diphosphate as in proliferation assay. The cells were fixed and counted. Smooth muscle cell proliferation was inhibited by fructose-1,6-diphosphate at 10 mg/ml. In the xenograft models of 1:10, 1:5, and 1:1 fructose-1,6-diphosphate inhibited proliferation at 10 mg/ml. In migration studies 10 mg fructose-1,6-diphosphate per ml was inhibitory to both cell types. In large-, mid-, and capillary-sized blood vessels, fructose-1,6-diphosphate inhibited proliferation of both cell types at 10 mg/ml. At the individual cell level, fructose-1,6-diphosphate is nonstimulatory to proliferation of endothelial cells while inhibiting migration, and it acts on smooth muscle cells by inhibiting both proliferation and migration.
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Affiliation(s)
- H H Cohly
- Department of Surgery, University of Mississippi Medical Center, Jackson 39216-4505, USA
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49
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Carreiras F, Rigot V, Cruet S, Andre F, Gauduchon P, Marvaldi J. Migration properties of the human ovarian adenocarcinoma cell line IGROV1: importance of alpha(v)beta3 integrins and vitronectin. Int J Cancer 1999; 80:285-94. [PMID: 9935212 DOI: 10.1002/(sici)1097-0215(19990118)80:2<285::aid-ijc19>3.0.co;2-l] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Cell migration of ovarian tumoral cells is essential for cell dissemination and for invasion of the submesothelial extracellular matrix (ECM). We have conducted a study of the migratory properties of an ovarian adenocarcinoma cell line (IGROV1) by using 2 distinct methods for the evaluation of cell migration. We found that in a short-term transfilter migration assay, IGROV1 cells migrated toward vitronectin, fibronectin, type IV collagen and laminin in an integrin-dependent manner. When migration was evaluated in a wound healing assay, the restitution of the wounded area was stimulated solely by added, exogenous vitronectin and was almost totally dependent on alpha(v)beta3 integrin function. Moreover, we demonstrated that alpha(v)beta3 was localized in focal contacts restricted to the leading edge of migrating cells, whereas vitronectin notably localized with actin stress fibers and cortical actin. On the other hand, several kinase inhibitors were found to impede migration of IGROV1 induced by vitronectin. It thus appears that alpha(v)beta3-vitronectin interactions lead to the activation of multiple signaling pathway including activation of protein kinase C, phosphatidyl-inositol-3-phosphate kinase and protein tyrosine kinase. The "alpha(v)beta3-vitronectin system" is therefore essential to the migration of human ovarian carcinoma cells.
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Affiliation(s)
- F Carreiras
- UPRES-A 6032, Laboratoire de Biochimie Cellulaire, Faculté de Pharmacie, Marseille, France
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50
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André F, Rigot V, Remacle-Bonnet M, Luis J, Pommier G, Marvaldi J. Protein kinases C-gamma and -delta are involved in insulin-like growth factor I-induced migration of colonic epithelial cells. Gastroenterology 1999; 116:64-77. [PMID: 9869604 DOI: 10.1016/s0016-5085(99)70230-1] [Citation(s) in RCA: 62] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
Abstract
BACKGROUND & AIMS The mechanisms by which epithelial cells migrate during the repair of damaged colonic mucosa are poorly understood. This study investigated the insulin-like growth factor I (IGF-I) signaling pathway leading to HT29-D4 human colonic epithelial cell line migration. METHODS IGF-stimulated cell migration was determined using a wound model in the presence or absence of kinase inhibitors. Activation of protein kinase C (PKC) was determined by immunodetection. RESULTS IGF-I and insulin induce cell migration without affecting cell proliferation through their cognate receptors. Des(1-3)-IGF-I, a truncated analogue of IGF-I, was more potent than IGF-I, suggesting that IGF-binding proteins secreted in the medium modulated IGF-I-induced cell migration. Inhibition of phosphatidylinositol 3-kinase, PKC, and mitogen-activated protein kinases eliminated cell restitution. Long-term exposure of cells to phorbol myristate acetate caused the depletion of PKC-delta and -gamma and prevented also IGF-I-induced cell motility. IGF-I also induced activation of PKC-delta and -gamma only. CONCLUSIONS IGF-I stimulates colonic restitution through the activation of multiple signaling pathways including activation of phosphatidylinositol 3-kinase, PKC-delta and -gamma, and mitogen-activated protein kinases.
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Affiliation(s)
- F André
- ESA CNRS 6032, Laboratoire de Biochimie Cellulaire, Universités d'Aix-Marseille I et II, Faculté de Pharmacie, Marseille, France
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