[Effect of thymus hormones on the capacity of lymphocytes for contact interaction with mast cells].

A study was made of the effect of thymostimulin, a medicine of thymus principles, on immature cells including also mastocyte-affined lymphocytes possessing membranous affinity to mast cells--the influence which may result in contact interaction of the above cell types with the formation of mastocyte-lymphocyte rosettes. The results obtained indicated that under certain conditions thymus principles influenced lymphocyte ability for contact interaction with mast cells.