Skip to main content
Aller à la page d’accueil de la Commission européenne (s’ouvre dans une nouvelle fenêtre)
français fr
CORDIS - Résultats de la recherche de l’UE
CORDIS
Contenu archivé le 2024-04-30

Biomarkers for the assessment of health risk from occupational exposure to isocyanates

Objectif

- To develop improved ways of monitoring exposure to isocyanates
- To examine the role of genetic polymorphism in isocyanate-metabolizing enzymes indetermining individual susceptibility to developing bronchial asthma
- To develop biomarkers (protein, haemoglobin, DNA adducts, cytogenetic changes) which can be used in assessing the relative hazards to allergic, mutagenic and/or carcinogenic diseases after exposure to isocyanates.

Isocyanates (with the general chemical formula R-(N=C=O)n are highly reactive industrial chemicals, widely used and produced by European chemical industries. Their principal use is in the manufacture of polyurethane foams, elastomers, adhesives, paints, and coatings. Workers who are exposed to isocyanates have a risk of developing chronic airway disorder, especially bronchial asthma. The incidence of occupational asthma in isocyanate exposed workers depends on the degree of exposure, and 5 -10 % of the exposed workers are affected. Isocyanates can react with proteins and form immunogenic protein complexes causing allergenic responses. Isocyanates can also react with water to form corresponding amines. Acetylated (di)amines are found in urine after occupational exposure to (di)isocyanates. Aromatic amines may also react with proteins and with DNA, after having been oxidised by the proper cytochrome P450 isozyme(s) and acetylated by N-acetyl transferase(s). Oxidation and conjugation reactions can thus play a role in determining the availability of activated amine metabolites. About 50% of Caucasians are slow N-acetylators, which could be an important determinant of individual responses to isocyanate exposure. It is unclear, however, to what extent the observed respiratory effects of isocyanates are caused by the parent compound, or by conjugates formed upon reaction with biological molecules. Isocyanates can also react with glutathione. Two glutathione S-transferases (GSTs), important enzymes in the conjugation of a number of electrophilic substances, are polymorphic. A large proportion of Caucasians lack both alleles of one or both of the GST genes. It is to be examined whether people with a slow N-acetylation associated genotype or with homozygous deletion of one or both of the GST genes have an increased susceptibility for diisocyanate-induced asthma.
One difficulty in measuring exposure to allergenic chemicals, such as isocyanates, is that the relevant exposure is often low and sometimes only of short duration. Adduct-formation with plasma proteins and with haemoglobin would allow integration of the dose over time, providing a better average of the daily exposure, and the ability to detect exposure some time after its occurrence.

Champ scientifique (EuroSciVoc)

CORDIS classe les projets avec EuroSciVoc, une taxonomie multilingue des domaines scientifiques, grâce à un processus semi-automatique basé sur des techniques TLN. Voir: Le vocabulaire scientifique européen.

Vous devez vous identifier ou vous inscrire pour utiliser cette fonction

Programme(s)

Programmes de financement pluriannuels qui définissent les priorités de l’UE en matière de recherche et d’innovation.

Thème(s)

Les appels à propositions sont divisés en thèmes. Un thème définit un sujet ou un domaine spécifique dans le cadre duquel les candidats peuvent soumettre des propositions. La description d’un thème comprend sa portée spécifique et l’impact attendu du projet financé.

Appel à propositions

Procédure par laquelle les candidats sont invités à soumettre des propositions de projet en vue de bénéficier d’un financement de l’UE.

Données non disponibles

Régime de financement

Régime de financement (ou «type d’action») à l’intérieur d’un programme présentant des caractéristiques communes. Le régime de financement précise le champ d’application de ce qui est financé, le taux de remboursement, les critères d’évaluation spécifiques pour bénéficier du financement et les formes simplifiées de couverture des coûts, telles que les montants forfaitaires.

CON - Coordination of research actions

Coordinateur

FINNISH INSTITUTE OF OCCUPATIONAL HEALTH
Contribution de l’UE
Aucune donnée
Adresse
41 A,Topeliuksenkatu 41 A
00250 HELSINKI
Finlande

Voir sur la carte

Coût total

Les coûts totaux encourus par l’organisation concernée pour participer au projet, y compris les coûts directs et indirects. Ce montant est un sous-ensemble du budget global du projet.

Aucune donnée
Mon livret 0 0