Antibodies to Endometrial Transferrin and Alpha 2‐Heremans Schmidt (HS) Glycoprotein in Patients With Endometriosis

S Pillai, Subbi Mathur, Guangzhao Zhou, GARY X. ZHOU, G X Zhou, Haixiang Jiang, P Arnaud, William J. Butler, H Jiang, W J Butler, HUAMEI ZHANG, Philippe Arnaúd, H Zhang
American journal of reproductive immunology (New York, N.Y. : 1989) · 1996 · vol. 35(5) , pp. 483–494 · doi:10.1111/j.1600-0897.1996.tb00129.x · PMID:8738720 · W1980228750
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This study identified antibodies against endometrial transferrin and alpha 2-HS glycoprotein in patients with endometriosis, suggesting their utility in a diagnostic assay.

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Abstract

PROBLEM: Identifying the endometrial antigens inciting autoimmunity is important in setting up an antibody assay for a non-invasive diagnosis and clinical monitoring of endometriosis. METHODS: Two-dimensional gel electrophoresis of endometrial extracts, Western blot analysis, passive hemagglutination and enzyme-linked immunosorbent assay (ELISA), amino acid sequencing and molecular studies were done on chosen antigens. Forty-six women with endometriosis, 4 women with uterine leiomyomata, 4 with pelvic adhesions, 3 with repeat Cesarean sections (conditions that coexist with or predispose to endometriosis) and 46 controls participated. RESULTS: Antigens with molecular weights (MW) of 64 kDa [isoelectric point (pI) of 3.5-4.0] and 72 kDa (pI of 4.5) bound to IgG in all patients with endometriosis, but not the controls. Amino acid sequencing of the proteins revealed that they had homology to alpha 2-Heremans Schmidt (HS) glycoprotein (MW: 64 kDa) and transferrin (MW: 72 kDa). Endometriosis patients had significant antibody levels to these two proteins (predictive value of 80-90%). The analysis of patients' endometrial RNA detected the message for alpha 2-HS glycoprotein and transferrin. Albumin (pI 5.5) and collagen (pI 3.5) failed to elicit antibody responses. CONCLUSIONS: Patients with endometriosis have significant antibodies to endometrial transferrin and alpha 2-HS-glycoprotein. We can effectively use an antibody assay using these antigens for diagnosing endometriosis.

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Condition tags

endometriosis

MeSH descriptors

Autoantibodies Autoantigens Blood Proteins Endometriosis Transferrin Adult alpha-2-HS-Glycoprotein Amino Acid Sequence Ascitic Fluid Ascitic Fluid Autoantibodies Autoantigens Autoimmunity Blood Proteins Blood Proteins Blotting, Western Collagen Collagen DNA, Complementary Electrophoresis, Gel, Two-Dimensional

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