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Gaspar D, Peixoto R, De Pieri A, Striegl B, Zeugolis DI, Raghunath M. Local pharmacological induction of angiogenesis: Drugs for cells and cells as drugs. Adv Drug Deliv Rev 2019; 146:126-154. [PMID: 31226398 DOI: 10.1016/j.addr.2019.06.002] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2018] [Revised: 05/12/2019] [Accepted: 06/16/2019] [Indexed: 12/12/2022]
Abstract
The past decades have seen significant advances in pro-angiogenic strategies based on delivery of molecules and cells for conditions such as coronary artery disease, critical limb ischemia and stroke. Currently, three major strategies are evolving. Firstly, various pharmacological agents (growth factors, interleukins, small molecules, DNA/RNA) are locally applied at the ischemic region. Secondly, preparations of living cells with considerable bandwidth of tissue origin, differentiation state and preconditioning are delivered locally, rarely systemically. Thirdly, based on the notion, that cellular effects can be attributed mostly to factors secreted in situ, the cellular secretome (conditioned media, exosomes) has come into the spotlight. We review these three strategies to achieve (neo)angiogenesis in ischemic tissue with focus on the angiogenic mechanisms they tackle, such as transcription cascades, specific signalling steps and cellular gases. We also include cancer-therapy relevant lymphangiogenesis, and shall seek to explain why there are often conflicting data between in vitro and in vivo. The lion's share of data encompassing all three approaches comes from experimental animal work and we shall highlight common technical obstacles in the delivery of therapeutic molecules, cells, and secretome. This plethora of preclinical data contrasts with a dearth of clinical studies. A lack of adequate delivery vehicles and standardised assessment of clinical outcomes might play a role here, as well as regulatory, IP, and manufacturing constraints of candidate compounds; in addition, completed clinical trials have yet to reveal a successful and efficacious strategy. As the biology of angiogenesis is understood well enough for clinical purposes, it will be a matter of time to achieve success for well-stratified patients, and most probably with a combination of compounds.
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Affiliation(s)
- Diana Gaspar
- Regenerative, Modular & Developmental Engineering Laboratory (REMODEL), Biomedical Sciences Building, National University of Ireland Galway (NUI Galway), Galway, Ireland; Science Foundation Ireland (SFI) Centre for Research in Medical Devices (CÚRAM), Biomedical Sciences Building, National University of Ireland Galway (NUI Galway), Galway, Ireland
| | - Rita Peixoto
- Regenerative, Modular & Developmental Engineering Laboratory (REMODEL), Biomedical Sciences Building, National University of Ireland Galway (NUI Galway), Galway, Ireland; Science Foundation Ireland (SFI) Centre for Research in Medical Devices (CÚRAM), Biomedical Sciences Building, National University of Ireland Galway (NUI Galway), Galway, Ireland
| | - Andrea De Pieri
- Regenerative, Modular & Developmental Engineering Laboratory (REMODEL), Biomedical Sciences Building, National University of Ireland Galway (NUI Galway), Galway, Ireland; Science Foundation Ireland (SFI) Centre for Research in Medical Devices (CÚRAM), Biomedical Sciences Building, National University of Ireland Galway (NUI Galway), Galway, Ireland; Proxy Biomedical Ltd., Coilleach, Spiddal, Galway, Ireland
| | - Britta Striegl
- Competence Centre Tissue Engineering for Drug Development (TEDD), Centre for Cell Biology & Tissue Engineering, Institute for Chemistry and Biotechnology, Zurich University of Applied Sciences, Zurich, Switzerland
| | - Dimitrios I Zeugolis
- Regenerative, Modular & Developmental Engineering Laboratory (REMODEL), Biomedical Sciences Building, National University of Ireland Galway (NUI Galway), Galway, Ireland; Science Foundation Ireland (SFI) Centre for Research in Medical Devices (CÚRAM), Biomedical Sciences Building, National University of Ireland Galway (NUI Galway), Galway, Ireland
| | - Michael Raghunath
- Competence Centre Tissue Engineering for Drug Development (TEDD), Centre for Cell Biology & Tissue Engineering, Institute for Chemistry and Biotechnology, Zurich University of Applied Sciences, Zurich, Switzerland.
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Biela S, Striegl B, Frey K, Spatz JP, Kemkemer R. Distance-dependent adhesion of vascular cells on biofunctionalized nanostructures. Current Directions in Biomedical Engineering 2017. [DOI: 10.1515/cdbme-2017-0144] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
AbstractCell-cell and cell-extracellular matrix (ECM) adhesion regulates fundamental cellular functions and is crucial for cell-material contact. Adhesion is influenced by many factors like affinity and specificity of the receptor-ligand interaction or overall ligand concentration and density. To investigate molecular details of cell-ECM and cadherins (cell-cell) interaction in vascular cells functional nanostructured surfaces were used Ligand-functionalized gold nanoparticles (AuNPs) with 6-8 nm diameter, are precisely immobilized on a surface and separated by non-adhesive regions so that individual integrins or cadherins can specifically interact with the ligands on the AuNPs. Using 40 nm and 90 nm distances between the AuNPs and functionalized either with peptide motifs of the extracellular matrix (RGD or REDV) or vascular endothelial-cadherins (VEC), the influence of distance and ligand specificity on spreading and adhesion of endothelial cells (ECs) and smooth muscle cells (SMCs) was investigated. We demonstrate that RGD-dependent adhesion of vascular cells is similar to other cell types and that the distance dependence for integrin binding to ECM-peptides is also valid for the REDV motif. VEC-ligands decrease adhesion significantly on the tested ligand distances. These results may be helpful for future improvements in vascular tissue engineering and for development of implant surfaces.
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Affiliation(s)
- Sarah Biela
- Max Planck Institute (MPI) for Intelligent Systems, Stuttgart, Germany
| | - Britta Striegl
- MPI for Intelligent Systems, Stuttgart, Germany; Currently: ZAHW Zuerich, Switzerland
| | | | - Joachim P. Spatz
- MPI for Medical Research, Stuttgart, Germany; Heidelberg University, Germany
| | - Ralf Kemkemer
- Reutlingen University, Germany
- MPI for Medical Research, Stuttgart, Germany
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Hirsch C, Striegl B, Mathes S, Adlhart C, Edelmann M, Bono E, Gaan S, Salmeia KA, Hoelting L, Krebs A, Nyffeler J, Pape R, Bürkle A, Leist M, Wick P, Schildknecht S. Multiparameter toxicity assessment of novel DOPO-derived organophosphorus flame retardants. Arch Toxicol 2016; 91:407-425. [PMID: 26928308 PMCID: PMC5225203 DOI: 10.1007/s00204-016-1680-4] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2015] [Accepted: 02/09/2016] [Indexed: 01/06/2023]
Abstract
Halogen-free organophosphorus flame retardants are considered as replacements for the phased-out class of polybrominated diphenyl ethers (PBDEs). However, toxicological information on new flame retardants is still limited. Based on their excellent flame retardation potential, we have selected three novel 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) derivatives and assessed their toxicological profile using a battery of in vitro test systems in order to provide toxicological information before their large-scale production and use. PBDE-99, applied as a reference compound, exhibited distinct neuro-selective cytotoxicity at concentrations ≥10 µM. 6-(2-((6-oxido-6H-dibenzo[c,e][1,2]oxaphosphinin-6-yl)amino)ethoxy)-6H-dibenzo[c,e][1,2]oxaphosphinine 6-oxide (ETA-DOPO) and 6,6′-(ethane-1,2-diylbis(oxy))bis(6H-dibenzo[c,e][1,2]oxaphosphinine-6-oxide) (EG-DOPO) displayed adverse effects at concentrations >10 µM in test systems reflecting the properties of human central and peripheral nervous system neurons, as well as in a set of non-neuronal cell types. DOPO and its derivative 6,6′-(ethane-1,2-diylbis(azanediyl))bis(6H-dibenzo[c,e][1,2]oxaphosphinine-6-oxide) (EDA-DOPO) were neither neurotoxic, nor did they exhibit an influence on neural crest cell migration, or on the integrity of human skin equivalents. The two compounds furthermore displayed no inflammatory activation potential, nor did they affect algae growth or daphnia viability at concentrations ≤400 µM. Based on the superior flame retardation properties, biophysical features suited for use in polyurethane foams, and low cytotoxicity of EDA-DOPO, our results suggest that it is a candidate for the replacement of currently applied flame retardants.
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Affiliation(s)
- Cordula Hirsch
- Particles-Biology Interactions Laboratory, Swiss Federal Laboratories for Materials Science and Technology (Empa), Lerchenfeldstrasse 5, 9014, St. Gallen, Switzerland.
| | - Britta Striegl
- ZHAW, Life Sciences and Facility Management, Einsiedlerstr. 31, 8820, Waedenswil, Switzerland
| | - Stephanie Mathes
- ZHAW, Life Sciences and Facility Management, Einsiedlerstr. 31, 8820, Waedenswil, Switzerland
| | - Christian Adlhart
- ZHAW, Life Sciences and Facility Management, Einsiedlerstr. 31, 8820, Waedenswil, Switzerland
| | - Michael Edelmann
- ZHAW, Life Sciences and Facility Management, Einsiedlerstr. 31, 8820, Waedenswil, Switzerland
| | - Epifania Bono
- ZHAW, Life Sciences and Facility Management, Einsiedlerstr. 31, 8820, Waedenswil, Switzerland
| | - Sabyasachi Gaan
- Additives and Chemistry Group, Advanced Fibers, Swiss Federal Laboratories for Materials Science and Technology (Empa), Lerchenfeldstrasse 5, 9014, St. Gallen, Switzerland
| | - Khalifah A Salmeia
- Additives and Chemistry Group, Advanced Fibers, Swiss Federal Laboratories for Materials Science and Technology (Empa), Lerchenfeldstrasse 5, 9014, St. Gallen, Switzerland
| | - Lisa Hoelting
- University of Konstanz, Universitaetsstr. 10, 78457, Konstanz, Germany
| | - Alice Krebs
- University of Konstanz, Universitaetsstr. 10, 78457, Konstanz, Germany
| | - Johanna Nyffeler
- University of Konstanz, Universitaetsstr. 10, 78457, Konstanz, Germany
| | - Regina Pape
- University of Konstanz, Universitaetsstr. 10, 78457, Konstanz, Germany
| | - Alexander Bürkle
- University of Konstanz, Universitaetsstr. 10, 78457, Konstanz, Germany
| | - Marcel Leist
- University of Konstanz, Universitaetsstr. 10, 78457, Konstanz, Germany
| | - Peter Wick
- Particles-Biology Interactions Laboratory, Swiss Federal Laboratories for Materials Science and Technology (Empa), Lerchenfeldstrasse 5, 9014, St. Gallen, Switzerland
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Uhl M, Mellert K, Striegl B, Deibler M, Lamla M, Spatz JP, Kemkemer R, Kaufmann D. Cyclic stretch increases splicing noise rate in cultured human fibroblasts. BMC Res Notes 2011; 4:470. [PMID: 22040907 PMCID: PMC3220655 DOI: 10.1186/1756-0500-4-470] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2011] [Accepted: 10/31/2011] [Indexed: 01/07/2023] Open
Abstract
Background Mechanical forces are known to alter the expression of genes, but it has so far not been reported whether they may influence the fidelity of nucleus-based processes. One experimental approach permitting to address this question is the application of cyclic stretch to cultured human fibroblasts. As a marker for the precision of nucleus-based processes, the number of errors that occur during co-transcriptional splicing can then be measured. This so-called splicing noise is found at low frequency in pre-mRNA splicing. Findings The amount of splicing noise was measured by RT-qPCR of seven exon skips from the test genes AATF, MAP3K11, NF1, PCGF2, POLR2A and RABAC1. In cells treated by altered uniaxial cyclic stretching for 18 h, a uniform and significant increase of splicing noise was found for all detectable exon skips. Conclusion Our data demonstrate that application of cyclic stretch to cultured fibroblasts correlates with a reduced transcriptional fidelity caused by increasing splicing noise.
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Affiliation(s)
- Michael Uhl
- Institute of Human Genetics, University of Ulm, Albert Einstein Allee 11, D 89070 Ulm, Germany.
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