Germline PDCDL1 Gene Variants Are Associated with Increased Primary Melanoma Thickness

Area of Science:

• Genetics
• Oncology
• Dermatology

Background:

• Malignant melanoma (MM) incidence is rising, with tumor invasiveness being a key prognostic factor.
• Single-nucleotide polymorphisms (SNPs) are crucial in understanding cancer genetics, affecting susceptibility and prognosis.

Purpose of the Study:

• To investigate the association between specific SNPs in the PDCD1LG1 gene and malignant melanoma invasiveness and prognosis.
• To analyze the relationship between five PDCD1LG1 gene SNPs (rs822336, rs822337, rs822338, rs2297136, rs4143815) and tumor characteristics in MM patients.

Main Methods:

• Analysis of five SNPs in the PDCD1LG1 gene from 377 whole blood samples of MM individuals.
• Genotyping of rs822336, rs822337, rs822338, rs2297136, and rs4143815 SNPs.
• Statistical analysis to determine the association between SNP genotypes and tumor invasiveness, thickness, melanoma-specific survival (MSS), and progression-free survival (PFS).

Main Results:

• Specific genotypes of rs822336, rs822337, and rs822338 were associated with an increased risk of invasive melanomas.
• The AG or GG genotype in rs2297136 was linked to a lower risk of invasive MM, and the AA genotype was associated with thicker tumors.
• No significant associations were found between the studied SNPs and melanoma-specific survival (MSS) or progression-free survival (PFS).

Conclusions:

• SNPs rs822336, rs822337, rs822338, and rs2297136 in the PDCD1LG1 gene are associated with tumor invasiveness and thickness in malignant melanoma.
• These findings highlight the role of specific genetic variations in MM tumor progression.
• Further research incorporating genetic and epigenetic factors is necessary to fully understand MM susceptibility and prognosis.