Notch: control of lymphocyte differentiation in the periphery.

The complexity of the Notch signalling pathway has impeded progress in understanding its precise role in differentiation processes of the mature peripheral immune system. Nevertheless, both B and T lymphocyte responses are undoubtedly influenced by Notch ligation, and defining the mechanisms by which this is achieved remains a challenge. How the innate-adaptive interface and interactions between lymphocytes can be affected, together with the potential of this pathway for therapeutic intervention remain important and stimulating issues.