Naïve | Effector | Memory | |
Surface phenotype | CD45RA | CD45RA/RO | CD45RO |
CD44 lo | CD44 hi | CD44 hi | |
Integrins lo | Integrins hi | Integrins hi | |
CD29 lo | CD29 hi | CD29 hi | |
CD25 lo | CD25 hi | CD25 lo | |
Response to stimulation | |||
Antigen/APC | Low | High | |
Cytokine production | Mainly IL-2 | Th1/Th2 | |
Low concentration anti-CD3 Ab | No | Yes | |
Anti-CD2 Ab | Low | High | |
Need for costimulation | High | Low |