Cellular Interaction Analysis Characterizing Immunosuppressive Microenvironment Functions in MM Tumorigenesis From...

Area of Science:

• Immunology
• Oncology
• Bioinformatics

Background:

• Dysregulation of cell-cell interaction events (CCEs) contributes to tumor microenvironment (TME) heterogeneity.
• Understanding immune microenvironment alterations in multiple myeloma (MM) is crucial for therapeutic strategies.

Purpose of the Study:

• To investigate changes in the immune microenvironment and CCEs during the progression of MM from a healthy state.
• To identify CCEs associated with MM prognosis and drug response.

Main Methods:

• Analysis of scRNA-seq data from normal bone marrow (NBM) and MM disease states (MGUS, SMM, MM).
• Reconstruction of the immune microenvironment and identification of dysregulated CCEs.
• Correlation analysis of CCEs with patient prognosis and drug response.

Main Results:

• Increased percentages of NK cells, CD8+ T cells, and CD4+ T cells in disease states correlate with MM prognosis.
• Significant changes in CCEs were observed between disease states and NBM.
• Dysregulated CCEs, such as MIF-TNFRSF14, are involved in immune cell regulation and drug response (bortezomib, melphalan).
• A prognostic signature based on CCEs stratified MM patients into three risk groups.

Conclusions:

• Intercellular communication plays a critical role in MM evolution and progression.
• Dysregulated CCEs offer potential therapeutic targets for MM treatment.
• CD4+ T cell activation patterns reflect MM progression and risk stratification.