Related Experiment Video
Updated: Aug 15, 2026

Indirect Immunofluorescence on Frozen Sections of Mouse Mammary Gland
Published on: December 1, 2015
Kinetics of mammary and intestinal IgA-producing cells in the lactating rat
IgA-producing B lymphocytes in the lactating mouse mammary gland are thought to be derived from lymphoid tissues associated with the small intestine. By contrast, adoptive transfer studies in the rat have failed to confirm a simple entero-mammary migration of IgA plasma cell precursors during lactation. To explain this discrepancy we postulated that recent cIgA+ cell immigrants undergo extensive local proliferation in the rat mammary gland. The present study tested this hypothesis by determining mitotic indices of cIgA+ cells in the gland during lactation. The results did not support this contention and suggest that rat mammary cIgA+ B cells are not derived from the same pool of precursors providing IgA-producing B cells for the small intestine.
IgA-producing B lymphocytes in the lactating mouse mammary gland are thought to be derived from lymphoid tissues associated with the small intestine. By contrast, adoptive transfer studies in the rat have failed to confirm a simple entero-mammary migration of IgA plasma cell precursors during lactation. To explain this discrepancy we postulated that recent cIgA+ cell immigrants undergo extensive local proliferation in the rat mammary gland. The present study tested this hypothesis by determining mitotic indices of cIgA+ cells in the gland during lactation. The results did not support this contention and suggest that rat mammary cIgA+ B cells are not derived from the same pool of precursors providing IgA-producing B cells for the small intestine.
Related Concept Videos
Transcytosis of IgG
IgG molecules from a mother undergo transcytosis starting around 13 weeks of gestation. The amount of IgG transferred and entering the fetal blood circulation increases with...
Renewal of Intestinal Stem Cells

