Open AccessInhibition of Lymphocyte Proliferation by Polyamines Requires Ruminant‐Plasma Polyamine Oxidase
Author(s) -
ALLEN John C.,
SMITH Christopher J.,
HUSSAIN Javaid I.,
THOMAS J. Marc,
GAUGAS Joseph M.
Publication year - 1979
Publication title -
european journal of biochemistry
Language(s) - English
Resource type - Journals
eISSN - 1432-1033
pISSN - 0014-2956
DOI - 10.1111/j.1432-1033.1979.tb06275.x
Subject(s) - spermidine , putrescine , spermine , phytohaemagglutinin , polyamine , polyamine oxidase , in vitro , lymphocyte , diamine oxidase , amine oxidase (copper containing) , biochemistry , chemistry , microbiology and biotechnology , biology , enzyme , immunology
Spermine and spermidine in vitro are potent inhibitors of proliferation of phytohaemagglutinin‐stimulated rat thymic lymphocytes, lymphoma cells and human lymphoblastic leukaemia cells, but only in media supplemented by foetal calf serum. This inhibition is shown to be due to a bovine plasma polyamine oxidase, with a high specificity for these polyamines. Spontaneously dividing lymphocytes are not subject to this inhibition. This, plus direct evidence from synchronous cultures of EB2 cells demonstrates that the inhibition is expressed in the late G 1 or G 1 /S interface of the cell cycle. Putrescine was not an inhibitor in the presence of foetal calf serum but became so in the presence of human pregnancy serum, possibly due to the action of diamine oxidase.