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    Response of human tumour xenografts to fractionated X-irradiation.
        
        Radiother. Oncol. 6, 15-27 (1986)
    
    
    
				The response of two human tumour xenografts to single dose and fractionated X-rays has been tested using regrowth delay as the assay. The tumours were line transplanted cells from a moderately well-differentiated squamous carcinoma of the tonsillar fossa (XJ) and an undifferentiated carcinoma of the floor of the mouth (XR). Comparison of the dose response curves for single doses in air, clamped, or after misonidazole administration, led to estimates of the hypoxic fraction (∼ 15%) and the sensitizer enhancement ratio (≦1.6). When 5 daily fractions were used, the effect of misonidazole (miso) was lost and reoxygenation appeared to be effective in both tumours. Comparison of single doses and 5 fractions in clamped tumours, and in those sensitized by miso, allowed the sparing effect of fraction to be estimated. When analysed by the linear quadratic model the α/β ratios were found to be in the range of 6.4-9.2 Gy and 6.8-16.0 Gy for the two tumours. These values are in good agreement with murine tumours (assayed in vivo or in vitro), with human tumour cells assayed in vitro, and with analyses of fractionated clinical data for skin cancer.
			
			
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        Publikationstyp
        Artikel: Journalartikel
    
 
    
        Dokumenttyp
        Wissenschaftlicher Artikel
    
 
     
    
    
        Schlagwörter
        Fractionated Radiation ; Human Tumour Xenografts ; Misonidazole ; Reoxygenation ; Repair Of Sublethal Damage
    
 
     
    
    
        Sprache
        englisch
    
 
    
        Veröffentlichungsjahr
        1986
    
 
     
    
        HGF-Berichtsjahr
        0
    
 
    
    
        ISSN (print) / ISBN
        0167-8140
    
 
    
        e-ISSN
        1879-0887
    
 
     
     
     
	     
	 
	 
    
        Zeitschrift
        Radiotherapy and Oncology
    
 
		
    
        Quellenangaben
        
	    Band: 6,  
	    Heft: 1,  
	    Seiten: 15-27 
	    
	    
	
    
 
  
         
        
            Verlag
            Elsevier
        
 
         
	
         
         
         
         
         
	
         
         
         
    
         
         
         
         
         
         
         
    
        Begutachtungsstatus
        Peer reviewed
    
 
    
        Institut(e)
        Abteilung für Strahlenbiologie und Biophysik
    
 
     
     
     
     
     	
    
        PubMed ID
        3715059
    
    
    
        Scopus ID
        0022551834
    
    
        Erfassungsdatum
        1986-12-31