ITPR2 Promotes Acute Myeloid Leukemia Progression Through Calcium-Mediated Mitochondrial Dysfunction

Area of Science:

• Hematology
• Molecular Biology
• Cancer Research

Background:

• Acute myeloid leukemia (AML) is a challenging hematological malignancy with limited targeted therapies.
• Inositol 1,4,5-trisphosphate receptor type 2 (ITPR2) plays a critical role in cellular processes.
• This study investigates the role of ITPR2 in AML pathogenesis and its clinical significance.

Purpose of the Study:

• To elucidate the function of ITPR2 in regulating apoptosis in AML.
• To investigate the mechanism by which ITPR2 modulates mitochondrial calcium levels.
• To assess the clinical significance and prognostic value of ITPR2 in AML.

Main Methods:

• Quantitative real-time PCR (RT-qPCR) to measure ITPR2 expression in AML patients and controls.
• Bioinformatics analyses to explore ITPR2's role in AML and its association with immune infiltration.
• ITPR2 knockdown using siRNA and inhibition with 2-APB in THP-1 cells, followed by molecular characterization (RT-qPCR, WB, CCK-8, flow cytometry).

Main Results:

• ITPR2 expression is significantly elevated in AML patients and correlates with poor prognosis and risk stratification.
• ITPR2 is implicated in calcium signaling and mitochondrial function, with its expression negatively correlating with immune infiltration.
• ITPR2 knockdown or inhibition reduces cellular and mitochondrial calcium, induces mitochondrial dysfunction (increased ROS, decreased MMP, reduced mtDNA copy number), and promotes AML cell apoptosis.

Conclusions:

• ITPR2 promotes AML progression through the calcium-mitochondrial axis.
• ITPR2 serves as a potential prognostic biomarker for AML.
• ITPR2 represents a promising therapeutic target for acute myeloid leukemia.