de Almeida, G.P.* ; Lichtner, P. ; Eckstein, G.N. ; Brinkschmidt, T.* ; Chu, C.F.* ; Sun, S.* ; Reinhard, J.* ; Mädler, S.C.* ; Kloeppel, M.* ; Verbeek, M.* ; Zielinski, C.E.*
     
 
    
        
Human skin-resident host T cells can persist long term after allogeneic stem cell transplantation and maintain recirculation potential.
    
    
        
    
    
        
        Sci. Immunol. 7:eabe2634 (2022)
    
    
    
		
		
			
				Tissue-resident memory T cells (TRM) have recently emerged as crucial cellular players for host defense in a wide variety of tissues and barrier sites. Insights into the maintenance and regulatory checkpoints of human TRM cells remain scarce, especially due to the difficulties associated with tracking T cells through time and space in humans. We therefore sought to identify and characterize skin-resident T cells in humans defined by their long-term in situ lodgment. Allogeneic hematopoietic stem cell transplantation (allo-HSCT) preceded by myeloablative chemotherapy unmasked long-term sequestration of host T cell subsets in human skin despite complete donor T cell chimerism in the blood. Single-cell chimerism analysis paired with single-cell transcriptional profiling comprehensively characterized these bona fide long-term skin-resident T cells and revealed differential tissue maintenance for distinct T cell subsets, specific TRM cell markers such as galectin-3, but also tissue exit potential with retention of the transcriptomic TRM cell identity. Analysis of 26 allo-HSCT patients revealed profound interindividual variation in the tissue maintenance of host skin T cells. The long-term persistence of host skin T cells in a subset of these patients did not correlate with the development of chronic GvHD. Our data exemplify the power of exploiting a clinical situation as a proof of concept for the existence of bona fide human skin TRM cells and reveal long-term persistence of host T cells in a peripheral tissue but not in the circulation or bone marrow in a subset of allo-HSCT patients.
			
			
				
			
		 
		
			
				
					
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        Publikationstyp
        Artikel: Journalartikel
    
 
    
        Dokumenttyp
        Wissenschaftlicher Artikel
    
 
    
        Typ der Hochschulschrift
        
    
 
    
        Herausgeber
        
    
    
        Schlagwörter
        Expression; Lymphocytes; Adhesion; Disease; Blood
    
 
    
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        Sprache
        englisch
    
 
    
        Veröffentlichungsjahr
        2022
    
 
    
        Prepublished im Jahr 
        
    
 
    
        HGF-Berichtsjahr
        2022
    
 
    
    
        ISSN (print) / ISBN
        2470-9468
    
 
    
        e-ISSN
        2470-9468
    
 
    
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	    Band: 7,  
	    Heft: 67,  
	    Seiten: ,  
	    Artikelnummer: eabe2634 
	    Supplement: ,  
	
    
 
  
        
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            Verlag
            American Association for the Advancement of Science (AAAS)
        
 
        
            Verlagsort
            Washington, DC
        
 
	
        
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        Begutachtungsstatus
        Peer reviewed
    
 
    
        Institut(e)
        CF Genomics (CF-GEN)
    
 
    
        POF Topic(s)
        30501 - Systemic Analysis of Genetic and Environmental Factors that Impact Health
    
 
    
        Forschungsfeld(er)
        
    
 
    
        PSP-Element(e)
        A-632700-001
    
 
    
        Förderungen
        TRR FungiNet
Carl-Zeiss Stiftung
Deutsche Forschungsgemeinschaft (Excellence Cluster Balance of the Microverse)
German Center of Infection Research (DZIF)
German Federal Ministry of Research (BMBF)
Deutsche Forschungsgemeinschaft
    
 
    
        Copyright
        
    
 	
    
    
    
    
    
        Erfassungsdatum
        2022-02-08