1. Abbas, A.K., K.M. Murphy, and A. Sher. 1996. Functional diversity of helper T lymphocytes. Nature 383: 787–793.
2. Agresti C., D. D’Urso, and G. Levi. 1996. Reversible inhibitory effects of interferon-gamma and tumor necrosis factor-alpha on oligodendrocyte proliferation and differentiation in vitro. Eur. J. Neurosci. 8: 1106–1116.
3. Aloisi F., G. Penna, J. Cerase, B. Menèndez Iglesias, and L. Adorini. 1997. IL-12 production by central nervous system microglia is inhibited by astrocytes. J. Immunol. 159: 1604–1612.
4. Aloisi F., G. Penna, L. Minghetti, and L. Adorini. 1998a. CD40-CD40 ligand interaction and IFN-γ are required for IL-12 but not prostaglandin E2 secretion by microglia during antigen presentation to Th1 cells. Submitted.
5. Aloisi F., F. Ria, G. Penna, and L. Adorini. 1998b. Microglia are more efficient than astrocytes in antigen processing and in Thl but not Th2 cell activation. J. Immunol. 160: 4671–4680.