beta2-Glycoprotein 1 as a marker of antiphospholipid syndrome in women with recurrent pregnancy loss.
OBJECTIVE
To determine if beta2-glycoprotein 1 (beta2-GP1) antibodies are a better marker of the antiphospholipid antibody syndrome (APS) in women with recurrent pregnancy loss (RPL).


METHODS
Evaluation and testing of sera from women with RPL.


METHODS
A university-affiliated reproductive endocrinology practice.


METHODS
90 women with RPL; 45 women met criteria for APS and 45 women met criteria for RPL without antiphospholipid antibodies (APA). Both groups were of similar age and had a similar history of RPL.


METHODS
Patient sera were obtained from women with RPL and were tested for APA and beta2-GP1.


METHODS
A standard antiphospholipid antibody assay was employed to detect the presence of immunoglobulin (Ig)G, IgM, and IgA antibodies in serum against cardiolipin, phosphatidyl inositol, phosphatidyl glycerol, phosphatidyl serine, and phosphatidyl ethanolamine. Samples were also assayed with a commercial beta2-GP1 assay for IgG antibodies.


RESULTS
Among the 45 women with APS, 10 (22.2%) had positive IgG antibodies for beta2-GP1. Only 1 woman (2.2%) of 45 was positive for beta2-GP1 among the control group of women with RPL but negative APA. There was no correlation noted among the beta2-GP1-positive patients for a specific phospholipid antibody or isotype.


CONCLUSIONS
These data suggest that IgG beta2-GP1 antibodies are less sensitive than antiphospholipid antibodies for the diagnosis of APS.
Franklin
R D
RD
Division of Reproductive Endocrinology and Immunology, Department of Obstetrics & Gynecology, University of Tennessee, Memphis, Tennessee, 38163-2116, USA.
Hollier
N
N
Kutteh
W H
WH
D000026:Abortion, Habitual / Q000150:complications / Q000276:immunology*; D000328:Adult; D017152:Antibodies, Antiphospholipid / Q000097:blood; D016736:Antiphospholipid Syndrome / Q000097:blood / Q000175:diagnosis*; D015415:Biomarkers / Q000097:blood; D004797:Enzyme-Linked Immunosorbent Assay; D005260:Female; D006023:Glycoproteins / Q000097:blood*; D006801:Humans; D007074:Immunoglobulin G / Q000097:blood; D011237:Predictive Value of Tests; D011247:Pregnancy; D013223:Statistics as Topic; D053482:beta 2-Glycoprotein I
D017152:Antibodies, Antiphospholipid; D015415:Biomarkers; D006023:Glycoproteins; D007074:Immunoglobulin G; D053482:beta 2-Glycoprotein I