Antiphospholid antibodies regulate the expression of trophoblast cell adhesion molecules.
OBJECTIVE
To examine the effect of antiphospholipid antibodies on trophoblast expression of adhesion molecules.


METHODS
Primary cytotrophoblast cell cultures.


METHODS
Department of Obstetrics and Gynecology, Catholic University, Rome, Italy.


METHODS
Five normal pregnant women underwent uncomplicated vaginal delivery at 36 weeks of gestation.


METHODS
IgG antibodies were isolated from a patient with antiphospholipid syndrome and from a normal control subject, using protein-G Sepharose columns. Cytotrophoblast cells were dispersed in bicarbonate buffer containing trypsin and DNAse I.


METHODS
We investigated the effects of antiphospholipid antibodies on trophoblast adhesion molecules (alpha1 and alpha5 integrins, E and VE cadherins), both at the protein and mRNA levels.


RESULTS
The alpha1 and alpha5 integrins were present in trophoblast cells from 24 hours of culture. Treatment with IgG that were obtained from the patient with antiphospholipid syndrome significantly decreased alpha1 integrin and increased alpha5 integrin at both the mRNA and protein levels. Furthermore, IgG with antiphospholipid antibodies activities induced VE-cadherin down-regulation and the E-cadherin up-regulation at protein and mRNA levels compared with control IgG or untreated cells.


CONCLUSIONS
The results suggest that the inadequate trophoblastic invasion, induced by antiphospholipid antibodies, can be the result of abnormal trophoblast adhesion molecules expression.
Di Simone
Nicoletta
N
Department of Obstetrics and Gynecolgy, Universita' Cattolica del S. Cuore, Rome, Italy.
Castellani
Roberta
R
Caliandro
Dario
D
Caruso
Alessandro
A
D017152:Antibodies, Antiphospholipid / Q000097:blood / Q000494:pharmacology*; D015703:Antigens, CD; D016736:Antiphospholipid Syndrome / Q000276:immunology; D015139:Blotting, Southern; D015820:Cadherins / Q000032:analysis / Q000235:genetics; D015815:Cell Adhesion Molecules / Q000032:analysis*; D002478:Cells, Cultured; D005260:Female; D006801:Humans; D007074:Immunoglobulin G / Q000097:blood / Q000494:pharmacology; D039423:Integrin alpha1 / Q000032:analysis / Q000235:genetics; D039482:Integrin alpha5 / Q000032:analysis / Q000235:genetics; D011247:Pregnancy; D012333:RNA, Messenger / Q000032:analysis; D020133:Reverse Transcriptase Polymerase Chain Reaction; D014327:Trophoblasts / Q000737:chemistry*; D000099152:Cadherin 5
D017152:Antibodies, Antiphospholipid; D015703:Antigens, CD; D015820:Cadherins; D015815:Cell Adhesion Molecules; D007074:Immunoglobulin G; D039423:Integrin alpha1; D039482:Integrin alpha5; D012333:RNA, Messenger; D000099152:Cadherin 5