FOXE1 association with differentiated thyroid cancer and its progression

Area of Science:

• Genetics
• Oncology
• Molecular Biology

Background:

• Single nucleotide polymorphisms (SNPs) near thyroid transcription factor genes are associated with differentiated thyroid cancer (DTC) in Caucasoid populations.
• The study investigates the role of FOXE1 rs965513 and NKX2-1 rs944289 SNPs in German DTC patients.
• Analysis extends to tumor stages and tumor-infiltrating lymphocytes (ITL).

Purpose of the Study:

• To investigate the association of specific SNPs (FOXE1 rs965513, NKX2-1 rs944289) with differentiated thyroid cancer (DTC) in a German population.
• To determine if these SNPs correlate with tumor stage, lymph node metastasis, distant metastasis, or lymphocytic infiltration in DTC.
• To confirm or refute the role of these SNPs in DTC pathogenesis in a non-Caucasoid population.

Main Methods:

• Case-control study involving 243 DTC patients (papillary and follicular) and 270 healthy controls.
• Genotyping analysis was performed for the FOXE1 rs965513 and NKX2-1 rs944289 SNPs.
• Subgroup analysis stratified patients by tumor stage, metastasis status, and lymphocytic infiltration.

Main Results:

• The FOXE1 rs965513 SNP, specifically genotypes AA, AG, and allele A, showed a significantly higher frequency in DTC patients compared to controls, particularly in papillary thyroid cancer.
• rs965513 was associated with earlier tumor stages (T1-T2, T1-T3), presence of lymph node metastases (N1), and absence of lymphocytic infiltration (ITL).
• No significant association was found between the NKX2-1 rs944289 SNP and DTC in the German population.

Conclusions:

• The FOXE1 rs965513 SNP is confirmed as a risk factor for differentiated thyroid cancer in the German population.
• Allele A and genotypes AA/AG of rs965513 are particularly associated with increased risk for papillary thyroid cancer.
• The association with advanced tumor stages and lack of lymphocytic infiltration suggests rs965513 may indicate a more aggressive disease course, while NKX2-1 rs944289 plays a minor role.