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  • Title: Chemo-immunotherapy using saffron and its ingredients followed by E7-NT (gp96) DNA vaccine generates different anti-tumor effects against tumors expressing the E7 protein of human papillomavirus.
    Author: Khavari A, Bolhassani A, Alizadeh F, Bathaie SZ, Balaram P, Agi E, Vahabpour R.
    Journal: Arch Virol; 2015 Feb; 160(2):499-508. PubMed ID: 25395243.
    Abstract:
    Saffron and its components have been suggested as promising candidates for cancer prevention. Carotenoids and monoterpene aldehydes are two potent ingredients of saffron. The goal of the current study was to investigate the anti-tumor effect of chemo-immunotherapy using saffron and its ingredients followed by E7-NT (gp96) DNA vaccine against tumors expressing the E7 protein of human papillomavirus. The in vitro cytotoxic and apoptotic effects of aqueous saffron extract and its components were evaluated in malignant TC-1 and non-malignant COS-7 cell lines. Then, multimodality treatments using E7-NT (gp96) DNA vaccine combined with saffron extract and its ingredients as well as single-modality treatments were tested for their efficacy in inhibiting large and bulky tumor growth. Saffron and its components exerted a considerable anti-tumor effect through prevention of cell growth and stimulation of programmed cell death. Furthermore, 100 % of mice treated with crocin were tumor-free, in contrast to DNA vaccine alone (~66.7 %) and DNA + crocin (~33.3 %) indicating the high potency of crocin as a chemotherapeutic agent. Interestingly, the multimodality treatment using DNA vaccine along with picrocrocin augmented the anti-tumor effects of picrocrocin. Thus, the combination of DNA vaccine with saffron extract and crocin at certain concentrations did not potentiate protective and therapeutic effects compared to mono-therapies for the control of TC-1 tumors.
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