Lotter, H.* ; Helk, E.* ; Bernin, H.* ; Jacobs, T.* ; Prehn, C. ; Adamski, J. ; Gonzáles-Roldán, N.* ; Holst, O.* ; Tannich, E.*
     
    
        
Testosteron increases susceptibility to amebic liver abscess in mice and mediates inhibition of IFNγ secretion in natural killer T cells.
    
    
        
    
    
        
        PLoS ONE 8:e55694 (2013)
    
    
    
      
      
	
	    Amebic liver abscess (ALA), a parasitic disease due to infection with the protozoan Entamoeba histolytica, occurs age and gender dependent with strong preferences for adult males. Using a mouse model for ALA with a similar male bias for the disease, we have investigated the role of female and male sexual hormones and provide evidence for a strong contribution of testosterone. Removal of testosterone by orchiectomy significantly reduced sizes of abscesses in male mice, while substitution of testosterone increased development of ALA in female mice. Activation of natural killer T (NKT) cells, which are known to be important for the control of ALA, is influenced by testosterone. Specifically activated NKT cells isolated from female mice produce more IFNγ compared to NKT cells derived from male mice. This high level production of IFNγ in female derived NKT cells was inhibited by testosterone substitution, while the IFNγ production in male derived NKT cells was increased by orchiectomy. Gender dependent differences were not a result of differences in the total number of NKT cells, but a result of a higher activation potential for the CD4− NKT cell subpopulation in female mice. Taken together, we conclude that the hormone status of the host, in particular the testosterone level, determines susceptibility to ALA at least in a mouse model of the disease.
	
	
	    
	
       
      
	
	    
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        Publication type
        Article: Journal article
    
 
    
        Document type
        Scientific Article
    
 
    
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        Keywords
        Leishmania-donovani Infection ; Entamoeba-histolytica Trophozoites ; Plasmodium-chabaudi Malaria ; Invariant Nkt Cells ; Sexual-dimorphism ; Murine Macrophages ; Dendritic Cells ; Cutting Edge ; Nitric-oxide ; Bone-marrow
    
 
    
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        Language
        english
    
 
    
        Publication Year
        2013
    
 
    
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        HGF-reported in Year
        2013
    
 
    
    
        ISSN (print) / ISBN
        1932-6203
    
 
    
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	    Volume: 8,  
	    Issue: 2,  
	    Pages: ,  
	    Article Number: e55694 
	    Supplement: ,  
	
    
 
    
        
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            Publisher
            Public Library of Science (PLoS)
        
 
        
            Publishing Place
            Lawrence, Kan.
        
 
	
        
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        Reviewing status
        Peer reviewed
    
 
    
        Institute(s)
        Molekulare Endokrinologie und Metabolismus (MEM)
    
 
    
        POF-Topic(s)
        30201 - Metabolic Health
    
 
    
        Research field(s)
        Genetics and Epidemiology
    
 
    
        PSP Element(s)
        G-505600-001
    
 
    
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        Erfassungsdatum
        2013-02-18