Ändra sökning
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
Integration of in vitro neurotoxicity data with biokinetic modelling for the estimation of in vivo neurotoxicity.
Stockholms universitet, Naturvetenskapliga fakulteten, Institutionen för neurokemi.ORCID-id: 0000-0001-6298-201X
2007 (Engelska)Ingår i: Human and Experimental Toxicology, ISSN 0960-3271, E-ISSN 1477-0903, Vol. 26, nr 4, s. 333-338Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Risk assessment of neurotoxicity is mainly based on in vivo exposure, followed by tests on behaviour, physiology and pathology. In this study, an attempt to estimate lowest observed neurotoxic doses after single or repeated dose exposure was performed. Differentiated human neuroblastoma SH-SY5Y cells were exposed to acrylamide, lindane, parathion, paraoxon, phenytoin, diazepam or caffeine for 72 hours. The effects on protein synthesis and intracellular free Ca2+ concentration were studied as physiological endpoints. Voltage operated Ca2+ channel function, acetylcholine receptor function and neurite degenerative effects were investigated as neurospecific endpoints for excitability, cholinergic signal transduction and axonopathy, respectively. The general cytotoxicity, determined as the total cellular protein levels after the 72 hours exposure period, was used for comparison to the specific endpoints and for estimation of acute lethality. The lowest concentration that induced 20% effect (EC20) obtained for each compound, was used as a surrogate for the lowest neurotoxic level (LOEL) at the target site in vivo. The LOELs were integrated with data on adsorption, distribution, metabolism and excretion of the compounds in physiologically-based biokinetic (PBBK) models of the rat and the lowest observed effective doses (LOEDs) were estimated for the test compounds. A good correlation was observed between the estimated LOEDs and experimental LOEDs found in literature for rat for all test compounds, except for diazepam. However, when using in vitro data from the literature on diazepam's effect on gamma-amino butyric acid (GABA)A receptor function for the estimation of LOED, the correlation between the estimated and experimental LOEDs was improved from a 10,000-fold to a 10-fold difference. Our results indicate that it is possible to estimate LOEDs by integrating in vitro toxicity data as surrogates for lowest observed target tissue levels with PBBK models, provided that some knowledge about toxic mechanisms is known.

Ort, förlag, år, upplaga, sidor
2007. Vol. 26, nr 4, s. 333-338
Nyckelord [en]
Calcium/metabolism, Calpain/*metabolism, Caspases/*metabolism, Cell Differentiation, Cell Line;/pharmacology, Gliotoxin/*pharmacology, Humans, Immunosuppressive Agents/*pharmacology, Neurites/*metabolism, Neuroblastoma/*metabolism, Spectrin/metabolism
Identifikatorer
URN: urn:nbn:se:su:diva-32296DOI: 10.1177/0960327106072994ISI: 000246413500008PubMedID: 17615114OAI: oai:DiVA.org:su-32296DiVA, id: diva2:279981
Tillgänglig från: 2009-12-07 Skapad: 2009-12-07 Senast uppdaterad: 2017-12-12Bibliografiskt granskad

Open Access i DiVA

Fulltext saknas i DiVA

Övriga länkar

Förlagets fulltextPubMed

Sök vidare i DiVA

Av författaren/redaktören
Forsby, Anna
Av organisationen
Institutionen för neurokemi
I samma tidskrift
Human and Experimental Toxicology

Sök vidare utanför DiVA

GoogleGoogle Scholar

doi
pubmed
urn-nbn

Altmetricpoäng

doi
pubmed
urn-nbn
Totalt: 29 träffar
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf