5 years ago

In vitro targeting of colon cancer cells using spiropyrazoline oxindoles

In vitro targeting of colon cancer cells using spiropyrazoline oxindoles
We report on the synthesis and biological evaluation of a library of twenty-three spiropyrazoline oxindoles. The antiproliferative activity of the chemical library was evaluated in HCT-116 p53 (+/+) human colon cancer cell line with eight derivatives displaying good activities (IC50<15 μM). To characterize the molecular mechanisms involved in compound antitumoral activity, two spiropyrazoline oxindoles were selected for further studies. Both compounds were able to induce apoptosis and cell cycle arrest at G0/G1 phase and upregulated p53 steady-state levels, while decreasing its main inhibitor MDM2. Importantly, cytotoxic effects induced by spiropyrazolines oxindoles occurred in cancer cells without eliciting cell death in non-malignant CCD-18Co human colon fibroblasts. Additionally, we demonstrated that the combination of spiropyrazoline oxindole 2e with sub-toxic concentrations of the chemotherapeutic agent 5-fluorouracil (5-FU) exerted a synergistic inhibitory effect on HCT-116 colon cancer cell proliferation. Collectively, our results show the potential of spiropyrazoline oxindoles for development of novel anticancer agents.

Publisher URL: www.sciencedirect.com/science

DOI: S0223523417305792

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