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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Nudo, Leonora P. Catap, Elena S. |
| Description | Country affiliation: Philippines Author Affiliation: Nudo LP ( Institute of Biology, College of Science, University of the Philippines, Diliman, Quezon City 1101, Philippines.) |
| Abstract | AIMS OF THE STUDY: Crude extract of Uncaria perrottetii (A. Rich.) Merr. vinebark was evaluated for its immunomodulating activity in Balb/C mice. Initially, the immunomodulatory potential of the plant extract was evaluated using in vitro immune response assays at different concentrations of the plant extract (10 µg/mL, 20 µg/mL, 50 µg/mL and 100 µg/mL). Using the optimum concentration determined in the in vitro assays, the protective effect of the plant extract was assessed against drug-induced immunosuppression in vivo. MATERIALS AND METHODS: For the in vivo experiment, thirty-six (36) mice were divided into 3 groups of 12 mice each: (1) cyclophosphamide drug-induced (30 mg/kg BW) immunosuppressed mice (Cy group) served as the positive control; (2) Uncaria perrottetii extract and Cy-treated mice (U+Cy); and (3) PBS-injected mice as the negative control group [(-) CTRL]. RESULTS: The optimum concentration was determined to be 50 µg/mL in the in vitro assays. At this concentration, Uncaria perrottetii extract stimulated peritoneal phagocyte activation, produced a significant increase in the activity of phagocytic cells from the spleen and promoted splenic cellular proliferation with or without lipopolysaccharide (LPS) when compared with the PBS-treated cells (negative control). Moreover, cells treated with 50 µg/mL of Uncaria perrottetii increased macrophage respiratory burst activity that was comparable to that of the phorbol myristate acetate-stimulated splenic macrophages. In all immune assays undertaken in the in vivo experiment, the Cy-treated mice showed significantly lower response when compared with the PBS-treated mice. Significant improvement in peritoneal cell activation, phagocytic activity and cellular proliferation was exhibited by the U+Cy-treated mice when compared with Cy-injected mice. The extract from Uncaria perrottetii also significantly enhanced respiratory burst and plasma lysozyme activity compared with the Cy-injected mice. CONCLUSIONS: Based on the results of both in vitro and in vivo trials, Uncaria perrottetii extract has immunopotentiating activities on the innate immunity of Balb/C mice and the extract could potentially reverse the immunosuppressive effects of Cy. However, the potential of the plant as source of bioactive products and metabolites for drug development still has to be fully investigated. |
| File Format | HTM / HTML |
| ISSN | 03788741 |
| Issue Number | 2 |
| Volume Number | 133 |
| e-ISSN | 18727573 |
| Journal | Journal of Ethnopharmacology |
| Language | English |
| Publisher | Elsevier |
| Publisher Date | 2011-01-27 |
| Publisher Place | Ireland |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Discipline Ethnopharmacology Adjuvants, Immunologic Pharmacology Uncaria Isolation & Purification Animals Cell Proliferation Drug Effects Cyclophosphamide Antagonists & Inhibitors Toxicity Ethnopharmacology Female Immunity, Innate Immunosuppressive Agents In Vitro Techniques Male Mice Mice, Inbred Balb C Phagocytes Cytology Immunology Phagocytosis Phytotherapy Plant Extracts Superoxides Metabolism Chemistry Journal Article Research Support, Non-u.s. Gov't |
| Content Type | Text |
| Resource Type | Article |
| Subject | Drug Discovery Pharmacology |
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