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- Wikell, CeciliaLund University,Lunds universitet,Avdelningen för klinisk kemi och farmakologi,Institutionen för laboratoriemedicin,Medicinska fakulteten,Division of Clinical Chemistry and Pharmacology,Department of Laboratory Medicine,Faculty of Medicine (author)
Effects on drug disposition, brain monoamines and behavior after chronic treatment with the antidepressant venlafaxine in rats with experimental hepatic encephalopathy
- Article/chapterEnglish2002
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- 2002
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- LIBRIS-ID:oai:DiVA.org:liu-27665
- https://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-27665URI
- https://doi.org/10.1016/S0924-977X(02)00044-5DOI
- https://lup.lub.lu.se/record/109499URI
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- Language:English
- Summary in:English
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- Patients with chronic hepatic encephalopathy (HE) may present affective symptoms and antidepressant drug treatment in this condition is not uncommon. The present microdialysis study investigated treatment with the chronic antidepressant venlafaxine (VEN) in experimental HE with regard to tentative changes in pharmacokinetic and/or pharmacodynamic parameters. Three weeks after portacaval shunt (PCS) or sham operation in rats, VEN (10 mg/kg daily) was administered by implanted osmotic minipumps. VEN treatment for 14 days resulted in higher concentrations of VEN in PCS rats than in sham controls in serum and brain compartments, and the VEN levels in serum and brain were strongly inter-correlated. The serum N-desmethylvenlafaxine concentration did not differ between the groups, but correlated with the serum VEN levels. The other VEN metabolites were below the quantification limits. VEN treatment for 9-12 days significantly stimulated locomotion and rearing in the open field in sham controls, but failed to do so in the PCS rats. The concentrations of noradrenaline, dopamine, 5-HT, and 5-HIAA in neocortical dialysates were higher in PCS than in sham rats after 14 days of VEN treatment, but the elevations reached statistical significance only in the case of dopamine and 5-HIAA. In summary, there were significant pharmacokinetic and pharmacodynamic alterations in rats with experimental HE as compared to controls. The described experimental HE model may be useful for continued pharmacokinetic/pharmacodynamic interaction studies to unravel the pathophysiological consequences of HE on the CNS. Copyright ⌐ 2002 Elsevier Science B.V.
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- Apelqvist, Gustav (author)
- Hjorth, Stefan (author)
- Kullingsjö, J (author)
- Bergqvist, PB (author)
- Bengtsson, Finn,1956-Östergötlands Läns Landsting,Linköpings universitet,Hälsouniversitetet,Psykiatri,Psykiatriska kliniken(Swepub:liu)finbe20 (author)
- Avdelningen för klinisk kemi och farmakologiInstitutionen för laboratoriemedicin (creator_code:org_t)
Related titles
- In:European Neuropsychopharmacology12:4, s. 327-3360924-977X1873-7862
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- http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12126872&dopt=AbstractFULLTEXT
- http://dx.doi.org/10.1016/S0924-977X(02)00044-5FULLTEXT
- https://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-27665
- https://doi.org/10.1016/S0924-977X(02)00044-5
- https://lup.lub.lu.se/record/109499
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