CD47 Expression in Classic Hodgkin Lymphoma and Its Association With Tumor Microenvironment

Area of Science:

• Oncology
• Immunology
• Hematology

Background:

• Cluster of differentiation 47 (CD47) is overexpressed in many cancers, linked to poor outcomes.
• The role of CD47 in classic Hodgkin lymphoma (CHL), its immune checkpoints, and tumor microenvironment (TME) is not well understood.

Purpose of the Study:

• To investigate the expression and prognostic significance of CD47 in CHL.
• To explore the association between CD47, immune checkpoints (PD-1/PD-L1), and the TME in CHL.

Main Methods:

• Immunohistochemistry on CHL tumor tissues and analysis of public datasets (GSE17920).
• Assessment of CD47, PD-1, and PD-L1 expression in tumor cells and TME.
• Kaplan-Meier curves, Cox regression, and bioinformatic analyses (gene expression, immune infiltration via CIBERSORT).

Main Results:

• High CD47 expression in tumor cells (CD47tumor_score) and TME (CD47micro_score) correlated with worse progression-free survival (PFS).
• High CD47micro_score predicted inferior overall survival (OS).
• CD47 expression positively correlated with PD-L1 and was linked to chemokine signaling, immune cell migration, and increased M1 macrophage, neutrophil, and eosinophil infiltration.

Conclusions:

• CD47 expression is associated with disease progression and prognosis in CHL.
• CD47 shows a strong positive correlation with PD-L1 expression.
• Combined targeting of CD47 and PD-1/PD-L1 may represent a promising therapeutic approach for CHL.