Comment on

• A conditioned dendritic cell can be a temporal bridge between a CD4+ T-helper and a T-killer cell.

  Ridge JP, Di Rosa F, Matzinger P. Ridge JP, et al. Nature. 1998 Jun 4;393(6684):474-8. doi: 10.1038/30989. Nature. 1998. PMID: 9624003
• Help for cytotoxic-T-cell responses is mediated by CD40 signalling.

  Bennett SR, Carbone FR, Karamalis F, Flavell RA, Miller JF, Heath WR. Bennett SR, et al. Nature. 1998 Jun 4;393(6684):478-80. doi: 10.1038/30996. Nature. 1998. PMID: 9624004
• T-cell help for cytotoxic T lymphocytes is mediated by CD40-CD40L interactions.

  Schoenberger SP, Toes RE, van der Voort EI, Offringa R, Melief CJ. Schoenberger SP, et al. Nature. 1998 Jun 4;393(6684):480-3. doi: 10.1038/31002. Nature. 1998. PMID: 9624005