These results indicate that Pax-8 can promote iodide uptake, and specifically prolong the retention time of iodide in thyroid cancer in vitro and in vivo by promoting the expression of TPO and Tg proteins.
BRAF(V600E) mutation, in both primary and metastatic thyroid cancers, is associated with a marked drop in thyroperoxidase (29-fold) and pendrin (20-fold) expression and a considerable increase (five-fold) in GLUT-1 expression.
As individuals with goitrous hypothyroidism caused by TPO gene mutation develop thyroid cancer, regular and careful follow-up for such patients must be done.
Qualitative analysis of baseline and stimulated TG, NIS and PDS mRNA showed high sensitivity but low specificity in the prediction of thyroid cancer recurrence or metastases (accuracy under THST = 51%, 43% and 54%, respectively), whereas TPO and TSHR mRNA assays had higher specificity but low sensitivity, with accuracy under THST of 67% and 61%, respectively, that improved when these tests were combined.
TPO transcripts were detected in 7/10 (70%) patients with known metastases of thyroid cancer and in 39 of 110 (36%) patients without metastases (P<0.05), in 15/44 (34%) patients with goitre, in 17/41 (41%) cases with GD and in 4/54 (7.4%) subjects in the control group (P<0.05, controls vs all patients with thyroid disease).
To re-evaluate TPO expression in thyroid cancer, TPO mRNA expression was compared with TPO protein expression in 38 samples of thyroid tissue obtained from patients with various thyroid diseases.