Objective To explore the expressions and clinical values of pro-gastrin-releasing peptide(ProGRP) and carbohydrate antigen 72-4 (CA72-4) in patients with gastric cancer.Methods Ninety patients with gastric cancer and fifty healthy subjects were selected from January 2014 to December 2016 in our hospital.Serum levels of ProGRP and CA72-4 were detected by electrochemiluminescence.The relationships between ProGRP and clinicopathological characteristics,postoperative recurrence and CA72-4 were analyzed.The diagnostic values of ProGRP and CA72-4 in gastric cancer were analyzed by receiver operating characteristic (ROC) curve.Results The expressions of ProGRP and CA72-4 in patients with gastric cancer were (249.3 + 28.9) pg/ml and (148.8 + 33.5) U/ml respectively,which were significantly higher than those of healthy subjects [(14.4 ± 7.6) pg/ml and (3.8 ± 1.4) U/ml],and the differences were statistically sigificant (t =56.320,P ＜ 0.001;t =30.504,P ＜ 0.001).The expression of ProGRP in TNM stage Ⅲ-Ⅳ [(269.1 ±30.9)pg/ml] was obviously higher than that in stage Ⅰ-Ⅱ [(198.5 +23.9)pg/ml],with a significant difference (t =11.200,P ＜ 0.001).The expression of ProGRP in patients with lymph node metastasis [(259.9 ±31.4)pg/ml] was significantly higher than that in patients without lymph node metastasis [(190.3 ±26.8)pg/ml],with a significant difference (t =9.500,P ＜ 0.001).The expression of ProGRP in patients with postoperative recurrence after one year [(181.3 ± 21.7)pg/ml] was higer than that in patients without postoperative recurrence [(26.1 ± 12.8)pg/ml],with a significant difference (t =31.830,P ＜ 0.001).There was a positive correlation between serum ProGRP and CA72-4 (r =0.792,P =0.012).According to the ROC curve,the cut-off point of ProGRP was 23.6 pg/ml,and the diagnostic sensitivity was 80.0％,the specificity was 70.0％.The cut-off point of CA72-4 was 11.2 U/ml,and the diagnostic sensitivity was 60.0％,the specificity was 89.0％.The sensitivity and specificity diagnostic value of combined detection were 89.7％ and 94.8％,better than those of individual detection (x2 =6.028,P =0.009;x2 =4.675,P =0.031).Conclusion ProGRP and CA72-4 are highly expressed in the serum of gastric cancer patients,with a positive correlation.The combined detection of ProGRP and CA72-4 can improve the diagnostic sensitivity and specificity.ProGRP is significantly correlated with tumor stage,lymph node metastasis and prognosis,which may be a mew target for prevention and treatment of gastric cancer.