TABLE 3.
Constitutive TLR mRNA expression patterns in human leukocytesa
| Receptor | Expression of receptor inb:
|
||||
|---|---|---|---|---|---|
| T-lymphocytes | B-lymphocytes | NK cells | Monocytes | Dendritic cells | |
| TLR1 | + | + | + | + | + |
| TLR2 | ± | − | − | + | − |
| TLR3 | − | ± | + | − | − |
| TLR4 | − | − | − | + | − |
| TLR5 | + | − | + | ± | − |
| TLR6 | ± | + | + | ± | ± |
| TLR9 | − | − | − | − | + |
a
Data from reference 219.
b
All levels within one cell type are related to the highest level of TLR expression for that particular cell type. Of the listed cell types, T cells have the lowest expression levels and monocytes have the highest.