Major histocompatibility complex control of NK-related allogeneic lymphocyte cytotoxicity in rats. The contributions of strong and medial transplantation antigens.

Abstract:

:Allogeneic lymphocyte cytotoxicity (ALC) describes the elimination of allogeneic lymphocytes in vivo by an NK-related activity. There is evidence that ALC is demonstrable between donor and recipient when these are incompatible at MHC gene loci alone. Since ALC is a property of T cell-deficient nude rats, the role of the MHC in this rejection process needs further study. We have determined the contribution of the MHC to ALC using congenic and recombinant rats. In our analysis we have assumed that ALC involves the recognition of classic alloantigens by clonally distributed effector cells as for other examples of transplant rejection, although this is not yet proved. Strong ALC was measured between congenic rats that differed for MHC genes only. Non-MHC incompatibility alone did not elicit ALC. In the presence of MHC incompatibility the strength of ALC generated in a recipient was dependent on non-MHC genes. The PVG background generated high ALC responses whereas ALC was not measured in the DA rat. However ALC was measured in the congenic PVG-RT1avl (DA) rat. The contributions of classic class I (RT1.A), class II (RT1.B/D), and medial transplantation (RT1.C) regions of the rat MHC were determined by comparing different recombinant donors into the same recipient strain. Single region differences alone in any of these three MHC regions did not elicit full ALC. In two sets of transfers a combination of RT1.B/D and RT1.C region incompatibility was sufficient to generate a full allogeneic response. It can be concluded that the controlling element for allogeneic lymphocyte cytotoxicity is in the RT1.B/D-RT1.C region of the rat MHC.

journal_name

Transplantation

journal_title

Transplantation

authors

Ager A,Fajumi J,Sparshott SM,Ford WL,Butcher GW

doi

10.1097/00007890-198811000-00025

subject

Has Abstract

pub_date

1988-11-01 00:00:00

pages

762-7

issue

5

eissn

0041-1337

issn

1534-6080

journal_volume

46

pub_type

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