Inhibition of induced lymphocyte proliferation by lipid and protein components of the syncytiotrophoblast plasma membrane.
OBJECTIVE
The aim of this work was to define the respective responsibilities of the lipid and protein components of syncytiotrophoblast plasma membranes on the inhibition of lymphocyte proliferation induced in vitro.


METHODS
A fractionation method using octyl-beta-D-glucopyranoside enabled lipoprotein, lipid, and protein fractions to be isolated from the membrane.


RESULTS
The lipid fraction was shown nonspecifically to inhibit lymphocyte proliferation, to a lower extent compared with the native membrane. Alternatively, the protein fraction used as a proteoliposome contained the totality of the cytostatic effect of the native fraction.


CONCLUSIONS
These results are discussed generally in the context of the immunoregulatory role of membrane lipids and proteins and in relation to the local properties of syncytiotrophoblast plasma membrane components in fetal graft tolerance.
Lalmanach Girard
A C
AC
Laboratoire d'Immunologie, Faculté de Médecine, Tours, France.
Guillaumin
J M
JM
Thibault
G
G
Rupin
A
A
De Russé
J
J
Bardos
P
P
D002462:Cell Membrane / Q000737:chemistry / Q000276:immunology; D005260:Female; D015726:Giant Cells / Q000648:ultrastructure*; D006801:Humans; D008081:Liposomes / Q000302:isolation & purification; D008213:Lymphocyte Activation / Q000187:drug effects*; D008563:Membrane Lipids / Q000276:immunology / Q000302:isolation & purification / Q000494:pharmacology*; D008565:Membrane Proteins / Q000276:immunology / Q000302:isolation & purification / Q000494:pharmacology*; D011247:Pregnancy; D014327:Trophoblasts / Q000648:ultrastructure*
D008081:Liposomes; D008563:Membrane Lipids; D008565:Membrane Proteins