Tuberculosis vaccination needs to avoid 'decoy' immune reactions.

Current search for a new effective vaccine against tuberculosis involves selected antigens, vectors and adjuvants. These are being evaluated usually by their booster inoculation following priming with Bacillus Calmette-Guerin. The purpose of this article is to point out, that despite being attenuated of virulence, priming with BCG may still involve immune mechanisms, which are not favourable for protection against active disease.

A novel human IgA monoclonal antibody protects against tuberculosis.

Abs have been shown to be protective in passive immunotherapy of tuberculous infection using mouse experimental models. In this study, we report on the properties of a novel human IgA1, constructed using a single-chain variable fragment clone (2E9), selected from an Ab phage library. The purified Ab monomer revealed high binding affinities for the mycobacterial α-crystallin Ag and for the human FcαRI (CD89) IgA receptor.

Milan Hasek and the discovery of immunological tolerance.

This year is the 50th anniversary of the publication of a paper by Milan Hasek, in which he showed the phenomenon of immunological tolerance by the selective failure of chimaeric chick-embryo parabionts to produce antibodies against the red blood cells of each other. The discovery of tolerance was credited by the Nobel prize, but excluded Hasek, because he misinterpreted his original experimental results. Hasek exuded an impressive personality and a much admired joie de vivre.