title: Isolation of cellular membranes from rat mast cells.
abstract: Large amounts of membranes enriched either in perigranular membranes or in plasma membranes have been successfully isolated from rat peritoneal mast cells. A cycle consisting of a single sonication pulse to disrupt the mast cells followed by centrifugation to separate the released granules was repeated until 90% of the mast cells were disrupted. This technique resulted in a high yield of intact granules since the released granules were only exposed to the single sonication pulse. The intact granules were separated from plasma membrane fragments by centrifugation through a Percoll gradient. The perigranular membranes were then obtained by osmotic lysis of the purified intact granules. The plasma membrane fraction was enriched 4.5-fold (range, 4.1-6.1) in 5'-nucleotidase activity, a plasma membrane marker enzyme. No suitable marker enzyme activity was found for the perigranular membrane fraction. An important aspect of this procedure is its potential for obtaining both a plasma and perigranular membrane preparation in high yield and purity from the same mast cell preparation.
authors.forename: L M
authors.initials: LM
authors.lastname: Amende
authors.forename: M A
authors.initials: MA
authors.lastname: Donlon
mesh_terms: D000818:Animals; D002118:Calcium / Q000494:pharmacology; D002458:Cell Fractionation / Q000379:methods; D002462:Cell Membrane / Q000648:ultrastructure*; D002499:Centrifugation, Density Gradient; D006636:Histamine Release; D008297:Male; D008407:Mast Cells / Q000648:ultrastructure*; D051381:Rats; D011919:Rats, Inbred Strains; D012710:Serum Albumin, Bovine / Q000494:pharmacology; D013010:Sonication
chemical_list: D012710:Serum Albumin, Bovine; D002118:Calcium