Activity of bilobalide, a sesquiterpene from Ginkgo biloba, on Pneumocystis carinii
| Autor: | M Ghione, Massimo Scaglia, E Bombardelli, A. Bruno, Atzori C, G. Chichino |
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| Rok vydání: | 1993 |
| Předmět: |
Letter
Cyclopentanes Biology Pharmacology Acetone Rats Sprague-Dawley chemistry.chemical_compound Bilobalide In vivo Trimethoprim Sulfamethoxazole Drug Combination medicine Animals Humans Pharmacology (medical) Ginkgoales Furans Cells Cultured Plants Medicinal Plant Extracts Pneumocystis Ginkgo biloba Fibroblasts biology.organism_classification Trimethoprim In vitro Rats Pneumocystis Infections Ginkgolides Infectious Diseases Biochemistry chemistry Pneumocystis carinii Toxicity Female Diterpenes medicine.drug |
| Zdroj: | Antimicrobial Agents and Chemotherapy. 37:1492-1496 |
| ISSN: | 1098-6596 0066-4804 |
| DOI: | 10.1128/aac.37.7.1492 |
| Popis: | The sesquiterpene bilobalide, extracted from Ginkgo biloba leaves, was tested in vitro and in vivo for the ability to inhibit Pneumocystis carinii growth. Bilobalide was inhibitory to trophozoites cultured on human embryonic lung fibroblasts (HEL 299) at approximately the same concentration as trimethoprim plus sulfamethoxazole (lowest effective concentration, 50 micrograms of bilobalide per ml versus 9/45 microgram of trimethoprim-sulfamethoxazole per ml), inducing microscopically detectable morphological changes in the cytoplasm of the parasite. In pharmacologically immunosuppressed Sprague-Dawley rats transtracheally infected with a suspension of about 5 x 10(6) P. carinii trophozoites per ml, the daily intraperitoneal administration of bilobalide (10 mg/kg of body weight for 8 days) lowered the number of organisms by approximately 2 logs (that is, about 99%). There was no apparent toxicity either in uninfected HEL 299 feeder cells or in infected and uninfected animals. These studies suggest that the sesquiterpene bilobalide might be useful for therapy of and prophylaxis against P. carinii infections in humans. |
| Databáze: | OpenAIRE |
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