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Objective To investigate the clinical significance of heart fatty acid binding protein (H-FABP) and pregnancy associ-ated plasma protein A(PAPP-A) in acute coronary syndrome(ACS) .Methods A case-control study was conducted in 60 patients with ACS ,45 patients with stable angina pectoris (SAP) and50 patients without coronary heart diseases (control group) .All plasma samples were tested H-FABP and PAPP-A .Results Concentrations of H-FABP and PAPP-A were significantly different among the 3 groups(P<0 .01) .H-FABP and PAPP-A in ACS group were significant higher than those of SAP group and control group (P<0 .01) ,however there were no significant differences between SAP and control group (P>0 .05) .The sensitivity and specificity of H-FABP were 91 .7% and 78 .0% respectively analyzed by ROC curve .Similarly ,the sensitivity and specificity of PAPP-A were 48 .3% and 98 .0% respectively .The correlation of H-FABP and PAPP-A was high(r=0 .835 ,P<0 .01) according to the analysis by Pearson correlation analysis .Conclusion Concentrations of plasma H-FABP and PAPP-A had close relationship with ACS ,the sensitivity of H-FABP was much higher ,both of which could be the potential biomarkers and contributed to the diagnosis of exist-ence and progress of ACS .
ABSTRACT
Objective To investigate the clinical significance of heart fatty acid binding protein (H-FABP) and pregnancy associ-ated plasma protein A(PAPP-A) in acute coronary syndrome(ACS) .Methods A case-control study was conducted in 60 patients with ACS ,45 patients with stable angina pectoris (SAP) and50 patients without coronary heart diseases (control group) .All plasma samples were tested H-FABP and PAPP-A .Results Concentrations of H-FABP and PAPP-A were significantly different among the 3 groups(P<0 .01) .H-FABP and PAPP-A in ACS group were significant higher than those of SAP group and control group (P<0 .01) ,however there were no significant differences between SAP and control group (P>0 .05) .The sensitivity and specificity of H-FABP were 91 .7% and 78 .0% respectively analyzed by ROC curve .Similarly ,the sensitivity and specificity of PAPP-A were 48 .3% and 98 .0% respectively .The correlation of H-FABP and PAPP-A was high(r=0 .835 ,P<0 .01) according to the analysis by Pearson correlation analysis .Conclusion Concentrations of plasma H-FABP and PAPP-A had close relationship with ACS ,the sensitivity of H-FABP was much higher ,both of which could be the potential biomarkers and contributed to the diagnosis of exist-ence and progress of ACS .
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Objective: To establish an enzyme linked immunosorbent assay(ELISA)for erythropoietin(EPO) in serum, and observe its clinical application value thereof. Methods: Prepare the EPO polyclonal antibody, wash the plate with isopropyl alcohol, and then choose the suitable concentration of the antibody, enzyme labeled antibody, and antigen. After the reaction, check the sensitivity, recovery, specificity and stability of the method. The serum samples of anaemia and breast carcinoma individuals were detected. The results of radioimmunodetection were compared with that of normal control group. Results: The immo-assay plate showed strong adherence to proteins. The optimal concentrations of the antibody, enzyme labelled antibody and antigen were 1∶1 000, 1∶6 000 and 1∶800 separately. The sensitivity was 0.46 U/L. The cross-reaction with growth hormone and ferritin was low. The mean recoveries of samples with high and low concentrations were 96.3%, 97.3% respectively. The coefficients of variation of intra-assay and inter-assay were just 8.31% and 7.82%, and the stability was good. The EPO levels were higher in anaemia and breast carcinoma groups than that of normal group. There was no significant difference between the results of the radioimmunodetection and ELISA. Conclusion: The double-antibody sandwich ELISA method was established for EPO in serum, which had certain clinical application value.
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Objective To prepare a detective membrane strip for detection of food allergen-specific IgE in serum samples and estimate its clinical application value in allergic diseases. Methods The crude extracts of the food allergens were prepared. Nitrocellulose membrane as the solid support was selected and the coating and the detecting conditions were optimized. The membrane strips were used to detect serum samples in 210 patients with allergic diseases and the results were compared with German Allergy Screentesting system. Results The optima] experimental conditions were as follows: The NC membrane was adopted as the solid support. After being spotted, the food allergens were incubated for 2 hours at room temperature, followed by 2% PVA blocking for 1 hour. After serum samples were diluted (1: 10) and incubated for 2 hours at room temperature, the concentration of anti-human IgE was 2 μg/mL Compared with the German Allergy Screen-testing system, their positive detectical coincidence was 63.6%, and negative detectical coincidence was 94. 6%. The two methods had no difference in detecting the majority of food allergens such as egg white, milk, peanut, soybean, crab and shrimp (X2 2.53, 2.40, 2.08, 2.38, 0.17,1.13, P>0.05). Conclusions The advantages of our method for detecting allergic diseases are little serum needed, multiple detective allergens, simple manipulation and low cost. This method has obvious clinical application value, which should be a new detective method for the allergic diseases with broad perspectives.