Thymus-dependent and thymus-independent subpopulations of intestinal
intraepithelial lymphocytes: a granular subpopulation of probable bone
marrow origin and relationship to mucosal mast cells
G Mayrhofer
Intraepithelial lymphocytes have been examined histochemically in the small
intestines of normal rats and mice and in thymus-deficient animals (B rats
and nude mice). It is concluded that these cells are heterogeneous,
consisting of at least two subpopulations. One population contains
granules, is thymus-independent, and is probably bone-marrow-derived. The
other population does not contain granules and appears to be
thymus-dependent. It is suggested that the granular cell, which may be a
precursor of mucosal mast cells, is more properly a previously unrecognized
nonlymphoid leukocyte of bone marrow origin.
Volume 55,
Issue 3,
pp. 532-535,
03/01/1980
Copyright © 1980 by The American Society of Hematology