Abstract:
BACKGROUND:Development of agents that specifically kill cancer cells and simultaneously elicit antitumor immune response is a step forward in cancer therapy. In the present study, we investigated whether the administration of artemether contributes to the augmentation of antitumor immunity and the regression of tumor tissues in a mouse model of breast cancer. METHODS:An optimal immunostimulatory dose of artemether (ART) was defined by DTH reaction and antibody production in sRBC-challenged mice. Subsequent experiments were carried out on tumor-bearing BALB/c mice. In the first group of tumor-bearing mice, the dose of 10 mg/kg/day of artemether were intraperitoneally administered to each animal for six times. The second group was treated with 20 mg/kg/day of cyclophosphamide as a positive control, and the last group (negative control) received the ART diluents. Tumor size was measured during the 10-day experiment; on the last day, mice were sacrificed and their splenocytes and tumor infiltrating lymphocytes were harvested. The concentration of IL-4 and IFN-γ cytokines (using ELISA assay) and the percentage of splenic and tumor Treg cells (using Flowcytometry analysis) were measured. RESULTS:Artemether could increase both DTH reaction and the production of hemagglutinating antibody in normal mice. Administration of ART profoundly suppressed the progression of tumor tissues. As well, it was significantly effective in the depletion of splenic CD4+ CD25+ Foxp3+ Treg cells (p-value>0.05). ART also increased the production of IL-4 (p-value<0.05) and IFN-γ (p-value>0.05). As a conclusion, the cytotoxic and immunomodulatory properties of artemether were acknowledged in vivo.
journal_name
Int Immunopharmacoljournal_title
International immunopharmacologyauthors
Farsam V,Hassan ZM,Zavaran-Hosseini A,Noori S,Mahdavi M,Ranjbar Mdoi
10.1016/j.intimp.2011.07.008subject
Has Abstractpub_date
2011-11-01 00:00:00pages
1802-8issue
11eissn
1567-5769issn
1878-1705pii
S1567-5769(11)00285-2journal_volume
11pub_type
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