Cover: The MAK Collection for Occupational Health and Safety

The MAK Collection for Occupational Health and Safety

German Research Foundation – Permanent Senate Commission for the Investigation of Health Hazards of Chemical Compounds in the Work Area
(MAK Commission)

ISSN 2509-2383



Acetylcholinesterase-Hemmer – Addendum: Aussetzung des BAT-Wertes und Weiterführung als BLW

Beurteilungswerte in biologischem Material

Wobbeke Weistenhöfer1
  Hans Drexler1 (Leitung der Arbeitsgruppe „Beurteilungswerte in biologischem Material“ der Ständigen Senatskommission zur Prüfung gesundheitsschädlicher Arbeitsstoffe, Deutsche Forschungsgemeinschaft)
  Andrea Hartwig2 (Vorsitz der Ständigen Senatskommission zur Prüfung gesundheitsschädlicher Arbeitsstoffe, Deutsche Forschungsgemeinschaft)
  MAK Commission3

1 Friedrich-Alexander-Universität Erlangen-Nürnberg, Institut und Poliklinik für Arbeits-, Sozial- und Umweltmedizin, Henkestraße 9–11, 91054 Erlangen, Deutschland
2 Institut für Angewandte Biowissenschaften, Abteilung Lebensmittelchemie und Toxikologie, Karlsruher Institut für Technologie (KIT), Adenauerring 20a, Geb. 50.41, 76131 Karlsruhe, Deutschland
3 Ständige Senatskommission zur Prüfung gesundheitsschädlicher Arbeitsstoffe, Deutsche Forschungsgemeinschaft, Kennedyallee 40, 53175 Bonn, Deutschland

Abstract

The German Senate Commission for the Investigation of Health Hazards of Chemical Compounds in the Work Area (MAK Commission) re-evaluated the biological tolerance value (BAT value) of acetylcholinesterase inhibitors, defined as a reduction in activity of no less than 70% of the reference value in erythrocytes. The BAT value is defined as a concentration at which the health of an employee generally is not adversely affected. However, it is not always clear whether the inhibition of acetylcholinesterase is the most sensitive toxicological endpoint of a substance or this has usually not been explicitly tested. The BAT value for the activity of acetylcholinesterase in erythrocytes is therefore suspended and continued as a biological guidance value (BLW). For substances for which it has been conclusively demonstrated that acetylcholinesterase inhibition in erythrocytes is the most sensitive endpoint, 70% of the reference value continues to be the BAT value.


Keywords

biological guidance value, BLW, biological tolerance value, BAT value, acetylcholinesterase, acetylcholinesterase inhibitors