The value of detection of systemic and local oxidation antioxidation of ascites in the differential diagnosis of benign and malignant ascites / 中国综合临床

ABSTRACT

Objective To explore the value of detection of systemic and local oxidation antioxidation level of ascites in the differential diagnosis of benign and malignant ascites.Methods Thirty-five patients with malignant ascites hospitalized in the Yidu Central Hospital of Weifang from December 2012 to November 2013 as the malignant ascites, and 35 cases of benign ascites as the control group.The ascites of malignant ascites group and plasma total antioxidant capacity (T-AOC) level of two group were detected by ferric ion reduction method.Plasma malonaldehyde (MDA) level of two group were detected by thiobarbituric acid content assay.Peripheral blood mononuclear cell (PBMCs) and tumor associated lymphocytes (TALS) in ascites were isolated by Ficoll density gradient centrifugation,the DNA damage of PBMCs and TALS were detected by single cell gel electrophoresis (SCGE) , expressed in the tailing rate.The value in the diagnosis of benign and malignant ascites was judged according to the analysis of above indexes.Results (1) The difference analysis: the levels of T-AOC in plasma in malignant ascites group was (9.26 ± 1.88)mM, significantly lower than that in benign ascites group((11.26± 1.78) mM, t =16.520,P =0.000);T-AOC levels of malignant ascites group ascites was (6.59± 1.38) mM, significantly lower than the plasma levels of T-AOC ((9.22± 1.86) mM, t =13.869, P =0.000);the MDA level of malignant ascites group was (6.26± 1.83) nM, significantly higher than that of serum benign ascites((3.26±1.12) nM,t=18.267,P=0.000);tailing rate of PBMCS in malignant ascites group was (17.9 ± 6.7) ％, significantly higher than that in benign ascites group ((9.6 ± 5.3) ％, P＜ 0.01);tailing rate of TALS in malignant ascites group was (442.6± 10.8) ％, significantly higher than that of PBMCS ((17.2±6.1)％ ,P＜0.01).(2)The correlation analysis: there was a negative correlation between plasma T-AOC and MDA in malignant ascites group (r =-0.518, P ＜ 0.01), tailing rate of T-AOC and TALS ascites (r =-0.566,P＜0.01) ,tailing rate of plasma T-AOC and PBMCS(t =-0.472,P＜0.01);there was a positive correlation between the tailing rate of plasma MDA and PBMCS (r =0.476, P ＜ 0.05).Conclusion In the malignant ascites group, there is oxidative stress in the whole body and the ascites, and the local oxidative stress in the ascites is more obvious.The sensitivity and accuracy of the diagnosis of malignant ascites can be increases by detected by the detection of the local oxidation resistance of the whole body and the ascites.