Journal
JOURNAL OF ETHNOPHARMACOLOGY
Volume 90, Issue 2-3, Pages 339-346Publisher
ELSEVIER IRELAND LTD
DOI: 10.1016/j.jep.2003.10.016
Keywords
Piper longum; piperine; alpha-esterase; antibody titer; plaque forming cells
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Alcoholic extract of the fruits of the plant Piper longum and its component piperine was studied for their immunomodulatory and antitumor activity. Alcoholic extract of the fruits was 100% toxic at a concentration of 500 mug/ml to Dalton's lymphoma ascites (DLA) cells and 250 mug/ml to Ehrlich ascites carcinoma (EAC) cells. Piperine was found to be cytotoxic towards DLA and EAC cells at a concentration of 250 mug/ml. Alcoholic extract and piperine was also found to produce cytotoxicity towards L929 cells in culture at a concentration of 100 and 50 mug/ml, respectively. Administration of alcoholic extract of Piper longum (10 mg/dose/animal) as well as piperine (1.14 mg/dose/animal) could inhibit the solid tumor development in mice induced with DLA cells and increase the life span of mice bearing Ehrlich ascites carcinoma tumor to 37.3 and 58.8%, respectively. Administration of Piper longum extract and piperine increased the total WBC count to 142.8 and 138.9%, respectively, in Balb/c mice. The number of plaque forming cells also enhanced significantly by the administration of the extract (100.3%) and piperine (71.4%) on 5th day after immunization. Bone marrow cellularity and a.-esterase positive cells were also increased by the administration of Piper longum extract and piperine. (C) 2003 Elsevier Ireland Ltd. All rights reserved.
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