Expression of PDK-1 and DMBT1 in the thyroid carcinoma and its clinicopathological significance

This study was designed to explore the expression of phosphoinositide-dependent protein kinase 1 (PDK-1), deleted in malignant brain tumors (DMBT1) in the thyroid carcinoma. A total of 87 fresh samples of thyroid carcinoma from surgical resection in The Second People's Hospital of Lianyungang from June 2016 to March 2018 were collected for the ELISA to detect the protein expression of PDK-1 and DMBT1. Then the pathological significance of the expression of PDK-1 and DMBT1 in the thyroid carcinoma and the correlation between them were analyzed, using the ROC curve to study the diagnostic value of each index. The expression of PDK-1 in the thyroid carcinoma tissue was significantly higher than that in the normal thyroid tissue with a statistical difference between them (P<0.05); the expression of DMBT1 in the thyroid carcinoma was statistically significantly lower than that in the normal thyroid tissue (P<0.05); the PDK-1 and DMBT1 expressions were in negative correlation in the thyroid carcinoma (r=−0.889, P<0.001). The AUG, specificity and the sensitivity of the PDK-1 in diagnosing the thyroid carcinoma were 0.862, 86.21% and 78.16%, respectively; the AUG, specificity and the sensitivity of the DMBT1 in diagnosing the thyroid carcinoma were 0.708, 66.67% and 67.82%, respectively; while the AUG, the specificity and the sensitivity of the combination of PDK-1 and DMBT1 in diagnosing the thyroid carcinoma were 0.888, 89.66% and 81.61%. In conclusion, the occurrence and progression of the thyroid carcinoma were related to the high expression of the PDK-1 and the low expression of the DMBT1 in the thyroid carcinoma tissues, the two of which were in connection with factors involving lymph node metastasis, pathological type, neoplasm staging, and clinical staging. Thus, the combined detection of PDK-1 and DMBT1 could be used as an effective index to determine the occurrence of thyroid carcinoma.