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Anticonvulsant activity of paeonimetabolin-I adducts obtained by incubation of paeoniflorin and thiol compounds with Lactobacillus brevis
- Source :
- Biologicalpharmaceutical bulletin. 22(5)
- Publication Year :
- 1999
-
Abstract
- Seventeen thiopaeonimetabolin-1 adducts were obtained as mixtures of diastereoisomers after incubation of paeoniflorin with Lactobacillus brevis in the presence of various thiols. The anticonvulsant activity of the adducts was investigated in mice using the maximal subcutaneous pentylenetetrazol seizure test and sodium valproate (1.5 mmol/kg) as a positive control. Thirteen adducts showed dose-dependent prolongation of latencies of clonic and tonic convulsions. Maximal protection against convulsions was effectively demonstrated by 8-(n-hexylthio)paeonimetabolin I (8) and 8-benzoylthiopaeonimetabolin I (18) at doses of 0.125 and 0.25 mmol/kg, respectively, while 100% protection was only achieved at 0.5 mmol/kg of 8-cyclopentylthiopaeonimetabolin I and 8-(p-tolylthio)paeonimetabolin I. The principal anticonvulsant activity of the diastereoisomers of 8 and 18 was attributed to their 7S-isomers [ED 50 values of 0.09 and 0.12 mmol/kg, and protective indices of 5.0 and 4.0 for 8 (75) and 18 (75), respectively], while the 7R counterparts [8 (7R) and 18 (7R)] showed a muscle relaxation effect.
- Subjects :
- Bridged-Ring Compounds
Male
Stereochemistry
medicine.medical_treatment
Sodium
Pharmaceutical Science
chemistry.chemical_element
Pharmacology
Benzoates
chemistry.chemical_compound
Mice
Glucosides
Seizures
medicine
Animals
Sulfhydryl Compounds
Pentylenetetrazol
Incubation
chemistry.chemical_classification
Analysis of Variance
biology
Lactobacillus brevis
Chemistry
General Medicine
biology.organism_classification
Paeoniflorin
Disease Models, Animal
Lactobacillus
Muscle relaxation
Anticonvulsant
Thiol
Monoterpenes
Pentylenetetrazole
Anticonvulsants
medicine.drug
Subjects
Details
- ISSN :
- 09186158
- Volume :
- 22
- Issue :
- 5
- Database :
- OpenAIRE
- Journal :
- Biologicalpharmaceutical bulletin
- Accession number :
- edsair.doi.dedup.....60a708921257fefff7f665a1fca03098