Sammanfattning

Recent evidences indicate an important role of tissue inflammatory responses by innate immune cells in allograft acceptance and survival. Here we investigated the role of mast cells (MC) in an acute male to female skin allograft rejection model using red MC and basophil (RMB) mice enabling conditional MC depletion. Kinetic analysis showed that MCs markedly accelerate skin rejection. They induced an early inflammatory response through degranulation and boosted local synthesis of KC, MIP-2, and TNF. This enhanced early neutrophil infiltration compared to a female-female graft-associated repair response. The uncontrolled neutrophil influx accelerated rejection as antibody-mediated depletion of neutrophils delayed skin rejection. Administration of cromolyn, a MC stabilizer and to a lesser extent ketotifen, a histamine type I receptor antagonist, and absence of MCPT4 chymase also delayed graft rejection. Together our data indicate that mediators contained in secretory granules of MC promote an inflammatory response with enhanced neutrophil infiltration that accelerate graft rejection.

Nyckelord

mast cells; neutrophils; degranulation; skin; transplantation

Publicerad i

Frontiers in Immunology
2018, Volym: 9, artikelnummer: 2690
Utgivare: FRONTIERS MEDIA SA

SLU författare

• Åbrink, Magnus

  • Institutionen för husdjurens biovetenskaper, Sveriges lantbruksuniversitet
    

• Pejler, Gunnar

  • Institutionen för husdjurens biovetenskaper, Sveriges lantbruksuniversitet
    
  • Uppsala universitet

UKÄ forskningsämne

Immunologi inom det medicinska området


Publikationens identifierare

DOI: https://doi.org/10.3389/fimmu.2018.02690

Permanent länk till denna sida (URI)

https://res.slu.se/id/publ/97724