[The financialization of medical laboratories in France: what are the risks for the profession and public health?].

Medical laboratories in France have always adapted to technical and medical progress, as well as to the regulations imposed by the supervisory authorities. However, over the last ten years, this evolution has been so important that biologists are witnessing a revolution in their mode of practice. The supervisory authorities wanted to increase and harmonize the quality of laboratory results.

Endothelin as a neuroprotective factor in the olfactory epithelium.

In mammals, the olfactory sensory neurons are the only ones directly in contact with an aggressive environment. Thus, the olfactory mucosa is one of the few neuronal zones which are continuously renewed during adulthood. We have previously shown that endothelin is locally matured in the olfactory mucosa and that olfactory sensory neurons preferentially express ETB receptors, while ETA receptors are rather present in non neuronal olfactory mucosa cells.

Pharmaceutical analysis beyond compendial requirements.

Recent ICH recommendations on test procedures and acceptance criteria for new drug substances of synthetic chemical origin and new drug products produced from them (Q6A) sets the frame for registration of new chemical entities. These requirements are automatically applied by all pharmaceutical companies to products in late developmental phases. Furthermore, and justifiably so, they do not provide any guideline for setting specifications other than those for residual solvents and residues of heavy metal catalysts.

Yeast system as a screening tool for pharmacological assessment of g protein coupled receptors.

G-protein-coupled receptors (GPCRs) constitute the largest but the most divergent class of cell surface proteins. Although they are thought to share a common 3D-structure composed of seven transmembrane helical domains, they can be activated by extracellular signals as diverse as light, peptides, proteins, lipids, organic odorants, taste molecules, nucleotides or nucleosides. They are involved in an extraordinarily large number of physiological functions and are therefore potential drug targets for many human diseases.

[Contribution of the medical biology laboratory to follow-up of HIV infection].

A statistical analysis of the results obtained over a 5-year period from 1997 to 2001 and the partial results from 2002 demonstrated the role of the medical biology laboratory in studying spread of the HIV virus. The pertinence of prevention campaigns was also evaluated.