Objective:To explore the expressions and clinical significances of tripartite motif-containing protein 28 (TRIM28), 3-phosphoinositide-dependent protein kinase-1 (PDK1), and N-cadherin in pancreatic carcinoma.Methods:A total of 72 patients diagnosed with pancreatic carcinoma underwent radical resection in the Department of Hepatobiliary Surgery, Binzhou People′s Hospital from January 2009 to November 2022 were selected, all of which were pathologically diagnosed as pancreatic ductal adenocarcinoma (PDAC). Immunohistochemistry was used to detect the expression of TRIM28, PDK1, and N-cadherin in 72 cases of pancreatic carcinoma and paracancerous tissues, to explore the correlation between the expression of them and the clinicopathological features of pancreatic carcinoma, and to analyze the influence of their expression and clinicopathological characteristics on the prognosis of patients. The count data were expressed as the number of cases and percentage, and the Chi-square test was used for comparison between groups. Spearman method was used for correlation analysis. Kaplan-Meier method was used for survival analysis, and Log-rank test was used to compare the survival rate, and univariate and multivariate Cox regression analysis were used to analyze the risk factors affecting prognosis.Results:The positive rates of TRIM28 (72.22%), PDK1 (65.28%) and N-cadherin (61.11%) in PDAC were significantly higher than those in para-cancerous tissues (26.39%, 33.33%, 34.72%). Moreover, the patients with high expression of the three had the characteristics of low differentiation, late stage, and lymph node metastasis ( P<0.05). TRIM28 was positively correlated with PDK1 and N-cadherin expression in PDAC ( r=0.720, P<0.001; r=0.714, P<0.001), N-cadherin and PDK1 expression in PDAC was also positively correlated ( r=0.854, P<0.001). Kaplan-Meier survival curve showed that the 2-year survival rate of patients with positive TRIM28, PDK1 and N-cadherin (13.46%, 14.89%, 13.64%) was significantly lower than that of patients with negative tumor (50.00%, 40.00%, 39.29%), the differences were statistically significant ( P<0.05). Univariate Cox regression analysis showed that patients with poor differentiation, nerve infiltration and lymph node metastasis, TNM stage Ⅲ+ Ⅳ, TRIM28 positive, PDK1 positive and N-cadherin positive had a significantly increased risk of death within 2 years after surgery ( P<0.05). Multivariate Cox regression analysis showed that poor differentiation, nerve infiltration, TNM stage Ⅲ+ Ⅳ and TRIM28 positive were independent risk factors for poor prognosis of patients with PDAC ( P<0.05). Conclusions:TRIM28, PDK1 and N-cadherin are highly expressed in PDAC, and the expression level is significantly correlated with the malignant degree of PDAC. TRIM28 is an independent risk factor for the prognosis of patients with PDAC.