Lymphoblastoid cell lines do not recapitulate physiological circulating B cell subtypes.

Area of Science:

• Immunology
• Cell Biology

Background:

• Lymphoblastoid cell lines (LCLs), derived from Epstein-Barr virus (EBV) transformed B lymphocytes, are widely used in research.
• The physiological relevance of LCLs for studying B cell function is debated due to inconsistent marker expression compared to primary B cells.

Purpose of the Study:

• To evaluate the physiological representativeness of LCLs by applying a recently proposed consensus panel of B cell subtyping markers.
• To characterize B cell subtypes within LCLs and identify alterations induced by EBV transformation.

Main Methods:

• Application of a consensus panel of core B cell subtyping markers to LCLs.
• Comparative analysis of marker expression in LCLs versus peripheral B cells.

Main Results:

• Most LCLs exhibited marker combinations not found on physiological peripheral B cells.
• Key B cell markers, including CD19 and CD21, were significantly altered during EBV-induced transformation to LCLs.
• While most LCLs secreted IgG, the associated marker profiles were largely artifacts of in vitro EBV transformation.

Conclusions:

• LCLs are generally not physiologically representative of their pre-transformed B cell subtypes.
• Findings necessitate careful interpretation of past research using LCLs and inform the design of future studies.
• The study highlights the profound impact of EBV transformation on B cell marker expression and function.