Burger, K.* ; Ilicic, K.* ; Dierolf, M.* ; Günther, B.* ; Walsh, D.W.M.* ; Schmid, E.* ; Eggl, E.* ; Achterhold, K.* ; Gleich, B.* ; Combs, S.E. ; Molls, M. ; Schmid, T.E. ; Pfeiffer, F.* ; Wilkens, J.J.
     
 
    
        
Increased cell survival and cytogenetic integrity by spatial dose redistribution at a compact synchrotron X-ray source.
    
    
        
    
    
        
        PLoS ONE 12:e0186005 (2017)
    
    
    
		
		
			
				X-ray microbeam radiotherapy can potentially widen the therapeutic window due to a geometrical redistribution of the dose. However, high requirements on photon flux, beam collimation, and system stability restrict its application mainly to large-scale, cost-intensive synchrotron facilities. With a unique laser-based Compact Light Source using inverse Compton scattering, we investigated the translation of this promising radiotherapy technique to a machine of future clinical relevance. We performed in vitro colony-forming assays and chromosome aberration tests in normal tissue cells after microbeam irradiation compared to homogeneous irradiation at the same mean dose using 25 keV X-rays. The microplanar pattern was achieved with a tungsten slit array of 50 μm slit size and a spacing of 350 μm. Applying microbeams significantly increased cell survival for a mean dose above 2 Gy, which indicates fewer normal tissue complications. The observation of significantly less chromosome aberrations suggests a lower risk of second cancer development. Our findings provide valuable insight into the mechanisms of microbeam radiotherapy and prove its applicability at a compact synchrotron, which contributes to its future clinical translation.
			
			
				
			
		 
		
			
				
					
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        Publikationstyp
        Artikel: Journalartikel
    
 
    
        Dokumenttyp
        Wissenschaftlicher Artikel
    
 
    
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        Schlagwörter
        Microbeam Radiation-therapy; Bystander; Carcinoma; Protons; Damage
    
 
    
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        Sprache
        englisch
    
 
    
        Veröffentlichungsjahr
        2017
    
 
    
        Prepublished im Jahr 
        
    
 
    
        HGF-Berichtsjahr
        2017
    
 
    
    
        ISSN (print) / ISBN
        1932-6203
    
 
    
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	    Band: 12,  
	    Heft: 10,  
	    Seiten: ,  
	    Artikelnummer: e0186005 
	    Supplement: ,  
	
    
 
  
        
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            Verlag
            Public Library of Science (PLoS)
        
 
        
            Verlagsort
            Lawrence, Kan.
        
 
	
        
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        Begutachtungsstatus
        Peer reviewed
    
 
     
    
        POF Topic(s)
        30203 - Molecular Targets and Therapies
    
 
    
        Forschungsfeld(er)
        Radiation Sciences
    
 
    
        PSP-Element(e)
        G-501300-001
    
 
    
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        Erfassungsdatum
        2017-10-29