transplant rejection

(redirected from Rejection reaction)

transplant rejection

Graft rejection, organ rejection, tissue rejection Immunology The constellation of host immune responses evoked when an allograft tissue is transplanted into a recipient; rejection phenomena may be minimized by optimal matching of MHC antigens and ABO blood groups and ameliorated with immunosuppressants–eg, cyclosporin, tacrolimus, rapamycin Exceptions of TR Corneal transplants, identical twins. See Graft-versus-host disease, HLA, MHC, Tissue typing.


1. an organ or tissue taken from the body and grafted into another area of the same individual or another individual.
2. to transfer tissue from one part to another or from one individual to another.

ovum transplant
see ovum transplant.
transplant rejection
References in periodicals archive ?
For example, giving group B blood to someone with group O would have a massive rejection reaction.
Dental pulp stem cells has relatively low immunogenicity with rare rejection reaction, thus it can be used for oneself and their immediate family members, which ultimately bring health to families.
Patients did not experience any rejection reaction or require long-term immune suppression, which are serious side effects associated with the use of human donor tissue.
The allospecific rejection reaction occurred at the contact site between the growing edges of incompatible colonies.
In a study involving nearly 4,000 patients published last year in the Journal of the American Society of Nephrology, Professor Gerhard Opelz, Caner Suesal, MD, and colleagues of the Heidelberg University Hospital found that the higher the soluble CD30 level, the more likely a rejection reaction.
Gray was the first coach of the modern era to suffer the ultimate Welsh Rugby Union rejection reaction - a mere three months after a side including the likes of Jonathan Davies, Robert Jones, Robert Norster and Paul Thorburn took Wales to their first - and last - Triple Crown since 1979.
During a rejection reaction between two colonies, classic cytotoxic responses are visible under the light microscope (e.
Colony specificity is a type of self-nonself recognition and rejection reaction against conspecifics that occurs in many colonial forms of animals; allogeneic colonies fuse to form a single mass or reject each other when the colonies come into contact at their growing edges, whereas syngeneic colonies always fuse with each other.
None of the patients experienced any rejection reaction or required long-term immunosuppressive therapy, serious issues associated with the use of human donor tissue.
Interestingly, cells that appear to be able to transfer from one colony to another during a rejection reaction have recently been observed (Rinkevich et al.
In contrast, the rejection reaction in each species is initiated at a specific stage of the fusion process.