通过检测乳腺癌患者术前、术后和健康体检者的血清中miR-1825相对表达水平，评估血清miR-1825对乳腺癌患者术前和术后的临床应用价值。采用回顾性研究，收集2018年10月至2021年3月南部战区总医院住院的乳腺癌术前患者血清92例、乳腺癌术后患者血清64例和健康体检者血清60例，年龄（49.6±11.7）岁，运用实时荧光定量PCR技术，检测miR-1825在乳腺癌患者术前、术后和健康体检者血清中的相对表达水平；结合相关临床病理资料，分析其表达与血清糖类抗原15-3（cancer antigen 15-3，CA15-3）、血清糖类抗原125（cancer antigen 125，CA-125）、癌胚抗原（carcinoembryonic antigen，CEA）的相关性；运用受试者工作特征曲线（receiver operating characteristic curve，ROC）评价miR-1825、CA15-3单独及两两联合检测对乳腺癌诊断价值。采用Mann-Whitney n U检验比较两组间指标水平差异，采用Krudkal-Wallis n H检验比较多组间指标水平差异。相关性分析采用Spearman法。miR-1825在乳腺癌患者术前血清中的相对表达水平1.290（0.705，1.793）比健康对照组0.18（-0.876，0.725）显著增高，而在乳腺癌患者术后化疗-0.080（-0474，0.405）中显著降低（n H=92.300，n P<0.001）；临床病理特征分析发现，处于Ⅲ~Ⅳ期、组织分化程度低、肿瘤≥2 cm的患者miR-1825表达水平更高［Ⅰ~Ⅱ期：0.975（0.458，1.380），Ⅲ~Ⅳ期：1.955（1.663，2.535），n U=98.000，n P<0.001；低分化：1.685（1.448，2.143），高/中分化：0.700（0.395，0.898），n U=15.500，n P<0.001；肿瘤<2 cm：0.935（0.438，1.370），肿瘤≥2 cm：1.915（1.580，2.288），n U=215.500，n P<0.001］。相关性分析发现乳腺癌患者血清miR-1825表达与CEA（n r=0.274，n P=0.008）、CA15-3（n r=0.587，n P<0.001）表达呈线性相关性；ROC曲线结果显示，血清miR-1825用于区别乳腺癌术前患者与健康者和术后患者时，均具有较好的诊断价值，其用于分析乳腺癌术前患者和术后患者时的AUC最高（AUC=0.914，95n %CI：0.872~0.956）。miR-1825可能是辅助诊断乳腺癌以及治疗效果监测的血清标志物之一。n “,”By measuring the relative expression level of miR-1825 in serum of pre-operative and post-operative patients with breast cancer and healthy subjects, the clincal value of miR-1825 for pre-operative and post-operative breast cancer patients was evaluated.The serum of pre-operative breast cancer patients(n n=92), post-operative breast cancer patients(n n=64) and healthy subjects(n n=60) were collected from General Hospital of Southern Theatre Command of PLA from October 2018 to March 2021. Real-time quantitative PCR was used to detect the relative expression of miR-1825 in the serum of breast cancer patients and healthy controls. The clinicopathological data were used to analyze the correlation between the expression level of miR-1825 and serum tumor markers level. The receiver operating characteristic curve (ROC) was used to evaluate the diagnosis value of breast cancer with miR-1825, CA15-3. Mann-Whitney n U test was used for comparisons between two groups,and Kruskal-Wallis n H test was used for multiple group comparisons. The correlation between miR-1825 and CEA, CA15-3, CA-125 expression were analyzed using Spearman correlation test.The relative expression level of miR-1825 in serum of pre-operative patients with breast cancer 1.290(0.705, 1.793) was significantly higher than that of healthy controls 0.18(-0.876, 0.725), but decreased after surgery and chemotherapy -0.080(-0474, 0.405). The analysis of clinicopathological characteristics found that the expression level of miR-1825 was higher in patients with stage Ⅲ-Ⅳ, low degree of tissue differentiation, and tumor larger than 2 cm[stageⅠ-Ⅱ:0.975(0.458, 1.380), stageⅢ-Ⅳ: 1.955(1.663, 2.535), n U=98.000, n P<0.001;low degree of tissue differentiation:1.685(1.448, 2.143), high/medium degree of tissue differentiation:0.700(0.395, 0.898), n U=15.500, n P<0.001; tumor smaller than 2 cm:0.935(0.438, 1.370), tumor larger than 2 cm:1.915(1.580, 2.288), n U=215.500, n P<0.001].Spearman analysis result showed that the expression of serum miR-1825 in breast cancer patients was linearly correlated with the expression of CEA (n r=0.274, n P=0.008) and CA15-3 (n r=0.587, n P<0.001); ROC curve result showed that miR-1825 was able to distinguish preoperative breast cancer patients from healthy people and postoperative patients. When using one biomarker to discriminate pre-operation and post-operation patients,miR-1825 had the best diagnostic efficiency,with an area under the ROC curve(AUC) of 0.914(95n %CI: 0.872-0.956). miR-1825 may become a potential serum marker for the diagnosis of breast cancer and monitoring of therapeutic efficacy.n