ABSTRACT
We analyzed the binding of P.rβ₂-GPI-DV with ox-LDL by fluorescence, molecular simulation and circular dichroism. We used SDS-PAGE and Western blotting to identify the purity of P.rβ₂-GPI-DV, fluorescence, circular dichroism spectroscopy and molecular docking simulation to analyze the binding between P.rβ₂-GPI-DV and oxLDL. P.rβ₂-GPI-DV was specifically recognized by anti-His antibody at 12 kDa position. The chromophoric groups, the changes of secondary structure and the molecular docking simulations revealed that the active pocket formed by Cys281-Lys-Asn-Lys-Glu-Lys-Lys287 and Leu313-Ala-Phe-Trp316 of P.rβ₂-GPI-DV and the -COOH carboxyl of oxLig-1 were the key for binding. P.rβ₂-GPI combined with ox-LDL via the fifth functional domain and the -COOH group. Our findings provide theoretical basis to further study the binding between β₂-GPI and ox-LDL in serum.
ABSTRACT
Objective To investigate the value of detections of anti‐nuclear antibody (ANA) combined with anti‐cardiolipin anti‐body (ACA) ,anti‐sperm antibody (AsAb) and anti‐beta 2 glycoprotein I (β2 GPI) antibody in the diagnosis of female infertility dis‐ease .Methods A total of 187 female cases of infertility (infertility group) were detected serum ANA and AsAb by the indirect im‐munofluorescence assay ,and ACA andβ2 GPI antibody by the enzyme linked immunosorbent assay (ELISA) .ANA ,ACA ,AsAb andβ2 GPI antibody also were detected in 80 females cases of normal fertility (normal group) .Results Among 187 cases of female infer‐tility ,ANA positive rate was 18 .1% (34/187) and which in the normal group was 2 .5% (2/80) .The ACA positive rate was 22 .3%(43/187) in the infertility group and 5 .0% (4/80) in the normal group ;the AsAb positive rate was 18 .7% (35/187) in the infertil‐ity group and 3 .8% (3/80) in the normal group ;theβ2 GPI positive rate was 20 .3% (38/187) in the infertility group and 3 .8% (3/80) in the normal group;the differences between the two groups had statistical significance (P<0 .05) .Conclusion Infertility is closely correlated with the in vivo existence of ANA ,ACA ,AsAb andβ2 GPI antibody ,the joint detection is conducive to find the e‐tiology of infertility and improve the clinical diagnosis rate .
ABSTRACT
Objective To compare the results of anti-cardiolipin (ACA)measuring by two commercial available kits.Methods ACA in total of 66 serum samples were both determined by kits from Euroimmun and YHLO simultaneously,then the re-sults were analyzed comparatively and correlatively.The Euroimmun kit was applied to determination the level of ACA-IgA/G/M,and the YHLO kit determined ACA-IgG/M and anti-β2-glycoprotein I antibody (β2GPI IgG).Results The positive rate by Euroimmun kit was 37.88% (25/66),while 31.82% (21/66)was positive (one positive among ACA-IgG,IgM andβ2GPI IgG)when determined by YHLO kit,and there was no significant difference between the two kits.The accordance rate of the two kits was 87.88% (58/66).The ACA-IgA/G/M value by Euroimmun kit and the summation of ACA-IgG, IgM andβ2GPI IgG by YHLO kit showed well linear correlation (r 2 =0.892,P <0.01).Conclusion Results from the two kits were consistent and correlated well,and they are suitable for the clinical application;these two kits have their own char-acteristics,which could be used by individual or combination accordingly.