Gene Variants in Components of the microRNA Processing Pathway in Chronic Myeloid Leukemia

Area of Science:

• Genetics and Genomics
• Molecular Biology
• Oncology

Background:

• Current chronic myeloid leukemia (CML) therapies significantly improve patient survival.
• Knowledge of molecular alterations beyond the BCR::ABL1 fusion gene in CML remains limited.
• MicroRNAs (miRNAs) regulate gene expression, and their pathway variants are linked to cancer susceptibility.

Purpose of the Study:

• To investigate the association between variants in microRNA biogenesis genes and susceptibility to chronic myeloid leukemia (CML).
• To explore the correlation of these genetic variants with CML prognosis and clinical characteristics.

Main Methods:

• Genotyping of fifteen variants across eight microRNA biogenesis genes in 296 CML patients and 485 healthy controls using TaqMan probes.
• Statistical analysis including Chi-square tests and logistic regression to evaluate associations with CML and clinical variables.
• Calculation of odds ratios and 95% confidence intervals.

Main Results:

• The rs13078 variant in the DICER1 gene was found at a significantly higher frequency in CML patients compared to healthy individuals.
• The rs7813 and rs2740349 variants showed a significant association with poorer CML prognosis based on Hasford scores.
• The rs2740349 variant was also linked to a later age of diagnosis in CML patients.

Conclusions:

• Genetic variants within the microRNA biogenesis pathway may contribute to the genetic susceptibility of chronic myeloid leukemia (CML).
• Specific variants, such as rs13078 in DICER1, are associated with CML risk, while others (rs7813, rs2740349) may impact disease prognosis and clinical presentation.