Serum miR-101-3p combined with pepsinogen contribute to the early diagnosis of gastric cancer
Abstract Background This study aimed to explore the effect of serum miR-101-3p combined with pepsinogen (PG) on early diagnosis of gastric cancer (GC).Methods The peripheral blood was isolated from patients with atrophic gastritis (AG), GC and healthy individuals respectively. RT-qPCR was used to detect the expression of miR-101-3p. Electrochemiluminescence (ECL) was used to reveal the carcinoembryonic antigen (CEA) expression level. Moreover, the expression of PGI and PGII was detected by ELISA. Furthermore, the area under the receiver operating characteristic (ROC) curve (AUC) was used to analyze the diagnostic efficacy of miR-101-3p and PG in early GC patients, AG patients and healthy individuals.Results There were significant differences in the expression levels of miR-101-3p, PGI and PGI/II ratio among groups (all P < 0.05). Serum miR-101-3p expression was correlated with process of invasion (P = 0.03). The miR-101-3p + PGI/II and miR-101-3p + PGI + PGI/PGII have higher diagnostic value (AUC) in AG (all P < 0.05). Meanwhile, miR-101-3p + PGI, miR-101-3p + PGI/II and miR-101-3p + PGI + PGI/II have higher AUC in GC (all P < 0.05). Moreover, miR-101-3p + PGI + PGI/II significantly (P < 0.05) improved the value of each indicator in individual diagnosis (sensitivity: 80.23, specificity: 77.05)Conclusions The miR-101-3p might take part in the progression of GC via influencing cell invasion. Furthermore, miR-101-3p + PG might be used as a novel marker for clinical diagnosis of GC.