Effect of gangliosides on murine megakaryocytopoiesis in a liquid culture system.

Abstract

ABSTRACT.Bovine brain gangliosides were applied to primary cultures of murine bone marrow cells to examine the role of gangliosides in development of megakaryocytes.Megakaryocytes in the cultures were detected by staining for a cytoplasmic enzyme, acetylcholinesterase, and divided into two types, 1)immature megakaryocytes which were stained less intensely, and 2) mature ones which were stained intensely. A medium containing total ganglioside fraction from bovine brain increased the number of both immature and mature megakaryocytes in the presence of pokeweed mitogen-stimulated murine spleen cell conditioned medium. Between the two cell types, the number of the mature cells was more significantly increased than the immature cells. The ganglioside GDla could substitute for the total ganglioside mixture. The results suggested that bovine brain gangliosides potentiated both megakaryocytic proliferation and maturation in vitro.