Mast cell clones: A model for the analysis of cellular maturation

Stephen J. Galli, Ann M. Dvorak, James A. Marcum, Teruko Ishizaka, Gary Nabel, Harout Der Simonian, Kathryn Pyne, Jerold M. Goldin, Robert D. Rosenberg, Harvey Cantor, Harold F. Dvorak

Research output: Contribution to journalArticlepeer-review

124 Scopus citations


Cloned mouse mast cells resemble, by ultrastructure, immature mast cells observed in vivo. These mast cell clones can be grown in the absence of any other cells, facilitating direct investigations of their biochemistry and function. We find that cloned mast cells express plasma membrane receptors (FcεR) that bind mouse IgE with an equilibrium constant (KA) similar to that of normal mouse peritoneal mast cells. In addition, cloned mast cells do not display detectable la antigens and cannot enhance Ig secretion when added to lymphocyte cultures or mediate natural killer lysis. In the presence of I mM sodium butyrate, cloned mast cells stop dividing and acquire abundant electron-dense cytoplasmic granules similar to those of mature mast cells. Their histamine content increases concomitant with cytoplasmic granule maturation and may exceed that of untreated mast cells by 50-fold. Unlike peritoneal mast cells, cloned mast cells incorporate 35S04 into chondroitin sulfates rather than heparin. 1-hese findings demonstrate that, unlike fully differentiated mouse peritoneal mast cells, cloned immature mouse mast cells contain no heparin and low levels of histamine. In addition, they establish that high-affinity FcεR are expressed early in mast cell maturation, well before completion of cytoplasmic granule synthesis and mediator storage.

Original languageEnglish (US)
Pages (from-to)435-444
Number of pages10
JournalJournal of Cell Biology
Issue number2
StatePublished - Nov 1 1982
Externally publishedYes

ASJC Scopus subject areas

  • Cell Biology


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