Identification of the Type of Blood-cell Responsible for the Graft-versus-Host Reaction in Chicks
The injection or transplantation of certain adult chicken cells into chicken embryos is known to cause a gross enlargement of the spleen and may often have fatal consequences. The enlargement produced by transplantation of adult spleen cells on to the chorioallantois has been studied by Danchakoff (1916) and by Ebert (1951, 1954). The same effect is produced by the intravenous injection of circulating white blood-cells from adult chickens (Simonsen, 1957; Terasaki, Cannon, & Longmire, 1959). The evidence of Billingham & Brent (1957, 1959), who have studied a similar phenomenon (‘runt disease’) in mice, and of Cock & Simonsen (1958) in chicks, indicates that these effects are due to the grafted adult cells reacting immunologically against the antigens of the helpless host. This type of reaction has been called the ‘graft-versus-host’ or graft against host reaction.