Abstract：
PURPOSE:PTEN and KLLN are two tumor suppressor genes located in 10q23, share a bidirectional promoter and have roles in carcinogenesis. Formerly, the role of PTEN mutations and KLLN epimutations were identified in incidence of thyroid lesions in individuals with Cowden syndrome, a rare autosomal dominant inherited disorder. This study is the first of its type to assess PTEN and KLLN circulating levels in patients with sporadic papillary thyroid carcinoma (PTC) and compare to patients with multinodular goiter (MNG) and healthy individuals. METHODS:Plasma levels of PTEN and KLLN were determined by enzyme-linked immunosorbent assay in three groups consisted of PTC (n = 33), MNG (n = 26) and healthy persons (n = 30). The association of demographic/pathological characteristics with the levels of PTEN and KLLN were evaluated. RESULTS:A significant lower plasma levels of PTEN and KLLN were observed in PTC patients compared with those of healthy persons (PTEN, 9.43 ± 3.20 vs. 16.96 ± 1.28 ng/ml, P = 0.000; KLLN, 1.81 ± 0.83 vs. 2.57 ± 1.09 ng/ml, P = 0.005), while no statistical difference was found between PTC and MNG groups. Patients with MNG lesion had significantly lower levels of PTEN/KLLN (PTEN, 9.62 ± 2.97 vs. 16.96 ± 1.28 ng/ml, P = 0.000; KLLN, 1.34 ± 0.86 vs. 2.57 ± 1.09 ng/ml, P = 0.000) compared to the healthy controls. The demographic/pathological characteristics did not demonstrate an association with the levels of PTEN and KLLN. CONCLUSIONS:The study suggests that the lowered levels of PTEN and KLLN are associated with both sporadic PTC and MNG tumorigenesis, but they cannot be considered as circulating biomarkers for differential diagnosis between malignancy and benignity in indeterminate thyroid nodules.
journal_name
Endocrinejournal_title
Endocrineauthors
Razavi SA,Modarressi MH,Yaghmaei P,Tavangar SM,Hedayati Mdoi
10.1007/s12020-017-1368-4subject
Has Abstractpub_date
2017-09-01 00:00:00pages
428-435issue
3eissn
1355-008Xissn
1559-0100pii
10.1007/s12020-017-1368-4journal_volume
57pub_type
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