Mendelian randomization analysis reveals the causal relationship between immune cells and leukemia

Area of Science:

• Immunology
• Genetics
• Oncology

Background:

• Emerging evidence suggests a connection between specific immune cell types and leukemia.
• The causal nature of this link has remained an area of active investigation.

Purpose of the Study:

• To investigate the causal relationship between 731 immune cell traits and leukemia.
• To identify specific immune cell traits that act as risk or protective factors for different types of leukemia.

Main Methods:

• A two-sample Mendelian randomization (MR) analysis was employed.
• Inverse variance weighted (IVW), weighted median, and MR-Egger methods were used for data analysis.
• Sensitivity analyses were performed to validate instrumental variables for heterogeneity and pleiotropy.

Main Results:

• A total of 58 immune cell traits showed a causal relationship with leukemia.
• Fifteen immune cell traits were identified as risk factors across acute myeloid leukemia (AML), acute lymphoblastic leukemia (ALL), chronic myeloid leukemia (CML), and chronic lymphocytic leukemia (CLL).
• Forty-three immune cell traits were identified as protective factors, with specific distributions across ALL, AML, CLL, and CML subtypes. Terminally differentiated CD4+ T cell absolute count was found to be protective for CLL.

Conclusions:

• Leukemia development is significantly associated with specific immune cell types.
• These findings provide a foundation for future research into immunotherapeutic strategies for leukemia.