Table 1.

Phenotype of interfollicular (IF) large B cells and other mature B cells




Other B-cell subtypes
Markers
IF large B cells
Naive/mantle zone
Germinal center
Monocytoid
Marginal zone of the spleen
Memory
Plasma cells
B-cell surface        
    CD20   Pos   Pos   Pos   Pos   Pos   Pos   Neg  
    CD75   Pos   Pos (weak)   Pos   Pos   Neg   Pos   Neg  
    CD79a   Pos (cyt)   Pos   Pos   Pos   Pos   Pos   Pos (cyt)  
    J-chain   Neg/(Pos)   Neg   Neg/(Pos)   Neg   Neg   No data   Neg/Pos  
B-cell—associated transcription factors        
    PAX-5   Pos   Pos   Pos   Neg/(Pos)   Pos   No data   Neg  
    BOB-1   Pos   Neg/(Pos)   Pos   Pos   Pos   Pos   Neg  
    OCT-2   Pos   Pos   Pos   Pos   Pos   Pos   Pos  
    PU.1   Neg   Pos   Pos   Pos   Pos   No data   Neg  
Mantle zone        
    IgD   Neg   Pos   Neg   Neg   Neg/(Pos)   Neg/Pos*  Neg/(Pos)  
    CD5   Neg   Pos (weak)   Neg   Neg   Neg   Neg/Pos   Neg  
    CD23   Neg   Pos   Neg   Neg   Neg   Neg   Neg  
Germinal center        
    CD10   Neg   Neg   Pos   Neg   Neg   Neg   Neg  
    BCL-6   Neg   Neg/(Pos)   Pos   Neg   Neg   Neg   Neg  
Memory B cells        
    CD27   Neg/(Pos)   Neg/(Pos)   Neg/(Pos)   Neg   Pos   Pos   Pos  
    IgM   Neg/(Pos)   Pos   Pos   Neg   Pos   Pos   Neg/Pos  
Plasma cells        
    VS38c (p63)   Neg   Neg   Neg   Neg   Neg   Neg   Pos  
    MUM-1/IRF-4   Pos (50%)   Neg   Neg/(Pos)  Neg   Neg   Neg   Pos  
    CD38   Neg   Neg   Pos   Pos (m/w)   Neg   Neg   Pos  
    CD138   Neg   Neg   Neg   Neg   Neg   Neg   Pos  
Activation-related        
    CD30   Neg/(Pos)  Neg   Neg/(Pos)   Neg   Neg   Neg   Neg  
Costimulatory        
    CD40   Pos (weak)   Pos   Pos   Pos (weak)   Pos   Pos   Pos (weak)  
    CD80   Neg   Neg   Pos   NA§  Pos   Pos   Neg  
    CD86   Neg   Neg   Pos   NA§  Pos   Pos   Pos  
Proliferation-related        
    MIB-1   Pos (50%)   Neg   Neg/Pos  Low (10%-15%)   Low (5%-10%)   Neg/Pos   Neg/Pos  
    p27/KIP1   Neg   Pos   Neg/Pos  Pos   Pos   Pos   Pos  
Apoptosis-associated        
    BCL-2   Neg   Pos   Neg/(Pos)   Neg   Pos   Pos   Pos  
    Caspase-3   Pos   Neg   Pos   Pos   ND   Pos   Pos  
B-cell precursor        
    TdT   Neg   Neg   Neg   Neg   Neg   Neg   Neg  
    CD34   Neg   Neg   Neg   Neg   Neg   Neg   Neg  
Complement receptor        
    CD21   Neg   Pos (weak)   Pos   Neg   Pos   Pos   Neg/(Pos)  
    CD35   Neg   Neg   Pos   Neg   Pos   Pos   Neg/(Pos)  
Dendritic cell        
    CD208   Neg   Neg   Neg   Neg   Neg   Neg   Neg  
Miscellaneous        
    MSH2   Pos   Neg/(Pos)   Pos   ND   ND   No data   Neg  
    S-100   Neg   Neg   Neg   Neg   Neg   Neg   Neg  
    CD68
 
Neg
 
Neg
 
Neg
 
Neg
 
Neg
 
Neg
 
Neg
 



Other B-cell subtypes
Markers
IF large B cells
Naive/mantle zone
Germinal center
Monocytoid
Marginal zone of the spleen
Memory
Plasma cells
B-cell surface        
    CD20   Pos   Pos   Pos   Pos   Pos   Pos   Neg  
    CD75   Pos   Pos (weak)   Pos   Pos   Neg   Pos   Neg  
    CD79a   Pos (cyt)   Pos   Pos   Pos   Pos   Pos   Pos (cyt)  
    J-chain   Neg/(Pos)   Neg   Neg/(Pos)   Neg   Neg   No data   Neg/Pos  
B-cell—associated transcription factors        
    PAX-5   Pos   Pos   Pos   Neg/(Pos)   Pos   No data   Neg  
    BOB-1   Pos   Neg/(Pos)   Pos   Pos   Pos   Pos   Neg  
    OCT-2   Pos   Pos   Pos   Pos   Pos   Pos   Pos  
    PU.1   Neg   Pos   Pos   Pos   Pos   No data   Neg  
Mantle zone        
    IgD   Neg   Pos   Neg   Neg   Neg/(Pos)   Neg/Pos*  Neg/(Pos)  
    CD5   Neg   Pos (weak)   Neg   Neg   Neg   Neg/Pos   Neg  
    CD23   Neg   Pos   Neg   Neg   Neg   Neg   Neg  
Germinal center        
    CD10   Neg   Neg   Pos   Neg   Neg   Neg   Neg  
    BCL-6   Neg   Neg/(Pos)   Pos   Neg   Neg   Neg   Neg  
Memory B cells        
    CD27   Neg/(Pos)   Neg/(Pos)   Neg/(Pos)   Neg   Pos   Pos   Pos  
    IgM   Neg/(Pos)   Pos   Pos   Neg   Pos   Pos   Neg/Pos  
Plasma cells        
    VS38c (p63)   Neg   Neg   Neg   Neg   Neg   Neg   Pos  
    MUM-1/IRF-4   Pos (50%)   Neg   Neg/(Pos)  Neg   Neg   Neg   Pos  
    CD38   Neg   Neg   Pos   Pos (m/w)   Neg   Neg   Pos  
    CD138   Neg   Neg   Neg   Neg   Neg   Neg   Pos  
Activation-related        
    CD30   Neg/(Pos)  Neg   Neg/(Pos)   Neg   Neg   Neg   Neg  
Costimulatory        
    CD40   Pos (weak)   Pos   Pos   Pos (weak)   Pos   Pos   Pos (weak)  
    CD80   Neg   Neg   Pos   NA§  Pos   Pos   Neg  
    CD86   Neg   Neg   Pos   NA§  Pos   Pos   Pos  
Proliferation-related        
    MIB-1   Pos (50%)   Neg   Neg/Pos  Low (10%-15%)   Low (5%-10%)   Neg/Pos   Neg/Pos  
    p27/KIP1   Neg   Pos   Neg/Pos  Pos   Pos   Pos   Pos  
Apoptosis-associated        
    BCL-2   Neg   Pos   Neg/(Pos)   Neg   Pos   Pos   Pos  
    Caspase-3   Pos   Neg   Pos   Pos   ND   Pos   Pos  
B-cell precursor        
    TdT   Neg   Neg   Neg   Neg   Neg   Neg   Neg  
    CD34   Neg   Neg   Neg   Neg   Neg   Neg   Neg  
Complement receptor        
    CD21   Neg   Pos (weak)   Pos   Neg   Pos   Pos   Neg/(Pos)  
    CD35   Neg   Neg   Pos   Neg   Pos   Pos   Neg/(Pos)  
Dendritic cell        
    CD208   Neg   Neg   Neg   Neg   Neg   Neg   Neg  
Miscellaneous        
    MSH2   Pos   Neg/(Pos)   Pos   ND   ND   No data   Neg  
    S-100   Neg   Neg   Neg   Neg   Neg   Neg   Neg  
    CD68
 
Neg
 
Neg
 
Neg
 
Neg
 
Neg
 
Neg
 
Neg
 

The data on interfollicular large B cells come from the present study. The data on other B-cell types comprise immunohistologic results from the literature and from the authors' own observations. The data on memory cells refer to studies of intraepithelial and peripheral blood cells. Pos indicates all cells positive; Neg, all cells negative; Pos (cyt), cytoplasmic positivity; Neg/(Pos), only scattered positive cells; Neg/Pos, less than 50% of cells positive; Pos (m/w), all cells show moderate to weak positivity; NA, not available; and ND, not done.

*

As described by Klein et al.

MUM-1 is expressed by scattered cells in the light zone of germinal center.

Large interfollicular cells expressing this marker were often present but the great majority are CD20-.

§

Data are not available as CD80 and CD86 antibodies worked on frozen sections only.

The majority of the cells in the dark zone of germinal centers are MIB-1+.

Some p27+ B cells were found in the light zone of germinal centers.

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