title: Histone synthesis and differentiation in murine virus-infected erythroleukemia cells.
abstract: The murine virus-infected erythroleukemia cells (MELC) has been used as a useful tool to examine the regulatory mechanism of the cytodifferentiation by the genetic approach. Addition of dimethylsulfoxide (DMSO) to the MELC culture induces erythroid differentiation. A study was made to assess whether stimulation of histone synthesis is associated with DMSO-induced differentiation of MELC during 4 days of culture in vitro. The synthesis of histone increased 2-fold in the 48 hr-incubated cells while the synthesis of non-histone protein was not stimulated. The histone synthesis was maximal at 48 hr and declined by 72 hr. 3H-leucine-labeled cells treated with DMSO was mixed with an equal weight of 14C-labeled control cells. Histones were isolated and fractionated on polyacrylamide gel. A 3.6-fold increase in 3H/14C ratio occurred in histone fraction 3 and 3.4-fold in histone fraction 2b. The data indicate that the stimulation of histone synthesis is an early event following DMSO treatment of MELC cells.
mesh_terms: D000818:Animals; D002454:Cell Differentiation; D002478:Cells, Cultured; D003593:Cytoplasm / Q000378:metabolism; D004591:Electrophoresis, Polyacrylamide Gel; D005622:Friend murine leukemia virus; D006657:Histones / Q000096:biosynthesis*; D004915:Leukemia, Erythroblastic, Acute / Q000378:metabolism* / Q000473:pathology; D007942:Leukemia, Experimental / Q000378:metabolism / Q000473:pathology; D051379:Mice; D009363:Neoplasm Proteins / Q000096:biosynthesis; D013454:Sulfoxides / Q000494:pharmacology
chemical_list: D006657:Histones; D009363:Neoplasm Proteins; D013454:Sulfoxides