[Biosciences between ethics and politics]

The increasing role of biosciences in the general organization of the culture and the consequences of this tendency in the society, involve the ridefinition of the concepts of disease and medicine. The need of rigorus informations locking of any false sensations is raising; in this context the role of bioethics, as a bridge between different knowledges to against the presumed idea of neutrality of science and to determinated social relationships based on equity.