 Efficacy and tolerability of a GD2-directed trifunctional bispecific antibody in a preclinical model: Subcutaneous administration is superior to intravenous delivery.
        Efficacy and tolerability of a GD2-directed trifunctional bispecific antibody in a preclinical model: Subcutaneous administration is superior to intravenous delivery.
     
    
        
    
    
        
        Mol. Cancer Ther. 14, 1877-1883 (2015)
    
    
 	
    
	
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			Open Access Green as soon as Postprint is submitted to ZB.
		
     
    
      
      
	
	    Trifunctional bispecific antibodies (trAb) are novel anticancer drugs that recruit and activate different types of immune effector cells at the targeted tumor. Thus, tumor cells are effectively eliminated and a long-lasting tumor-specific T-cell memory is induced. The trAb Ektomab is directed against human CD3 on T cells and the tumor-associated ganglioside GD2, which is an attractive target for immunotherapy of melanoma in humans. To optimize clinical applicability, we studied different application routes with respect to therapeutic efficacy and tolerability by using the surrogate trAb Surek (anti-GD2 x anti-murine CD3) and a murine melanoma engineered to express GD2. We show that subcutaneous injection of the trAb is superior to the intravenous delivery pathway, which is the standard application route for therapeutic antibodies. Despite lower plasma levels after subcutaneous administration, the same tumor-protective potential was observed in vivo compared to intravenous administration of Surek. However, subcutaneously delivered Surek showed better tolerability. This could be explained by a continuous release of the antibody leading to constant plasma levels and a delayed induction of proinflammatory cytokines. Importantly, the induction of counter-regulatory mechanisms was reduced after subcutaneous application. These findings are relevant for the clinical application of trifunctional bispecific antibodies and possibly also other immunoglobulin constructs.
	
	
	    
	
       
      
	
	    
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        Publication type
        Article: Journal article
    
 
    
        Document type
        Scientific Article
    
 
    
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        Keywords
        Epcam X Anti-cd3; Monoclonal-antibody; T-cells; Peritoneal Carcinomatosis; Antitumor Immunity; Malignant Ascites; Accessory Cells; Dendritic Cells; Cancer-patients; Breast-cancer
    
 
    
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        english
    
 
    
        Publication Year
        2015
    
 
    
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        HGF-reported in Year
        2015
    
 
    
    
        ISSN (print) / ISBN
        1535-7163
    
 
    
        e-ISSN
        1538-8514
    
 
    
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	    Volume: 14,  
	    Issue: 8,  
	    Pages: 1877-1883 
	    Article Number: ,  
	    Supplement: ,  
	
    
 
    
        
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            Publisher
            American Association for Cancer Research (AACR)
        
 
        
            Publishing Place
            Philadelphia
        
 
	
        
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        Reviewing status
        Peer reviewed
    
 
     
    
        POF-Topic(s)
        30504 - Mechanisms of Genetic and Environmental Influences on Health and Disease
    
 
    
        Research field(s)
        Immune Response and Infection
Enabling and Novel Technologies
    
 
    
        PSP Element(s)
        G-501700-006
G-500300-001
G-520300-001
    
 
    
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        Erfassungsdatum
        2015-06-14