ABSTRACT
Objective:To explore the application value of urine γ-synuclein (SNCG) in the diagnosis of bladder cancer.Methods:A total of urine samples from 129 patients with bladder cancer (malignant lesion group), 157 patients with urinary system benign lesions (benign lesion group), and 177 healthy people (the healthy control group) from January 2017 to April 2020 in the Fifth Clinical Medical College of Shanxi Medical University and Shanxi Provincial Cancer Hospital were collected. The concentration of SNCG in the collected urine was detected by using enzyme-linked immunosorbent assay. The receiver operating characteristic (ROC) curve was drawn to determine its sensitivity, specificity and accuracy for the diagnosis of bladder cancer.Results:The urine SNCG concentration in malignant lesion group [4.28 ng/ml (0.53-8.79 ng/ml)] was higher than that in healthy controls [1.44 ng/ml (0.56-3.51) ng/ml, H = 122.9, P < 0.01] and benign lesion group [1.97 ng/ml (0.51-5.87) ng/ml, H = 88.2, P < 0.01], and the concentration of urine SNCG in benign lesion group was higher than that in healthy controls ( H = 17.1, P < 0.01). ROC area under the curve (AUC) of urine SNCG in differentiating benign lesion group from healthy controls was 0.871(95% CI 0.819-0.923, P < 0.01), the best cut-off value was 2.79 ng/ml, the diagnostic sensitivity and specificity was 0.798 and 0. 977, respectively. AUC of urine SNCG in differentiating malignant lesion group from benign lesion group was 0.823(95% CI 0.769-0.877, P < 0.01), the best cut-off value was 3.54 ng/ml, the diagnostic sensitivity and specificity was 0.713 and 0.917, respectively. AUC of urine SNCG in differentiating malignant lesion group from healthy controls plus benign lesion group was 0.848 (95% CI 0.797-0.899, P < 0.01), the best cut-off value was 2.87 ng/ml, the diagnostic sensitivity and specificity was 0.791 and 0.901, respectively. Conclusions:The concentration of SNCG in urine of patients with bladder cancer is higher than that of patients with benign urinary lesions and healthy people. Urine SNCG has a good application value in the diagnosis of bladder cancer.