In vitro and in vivo studies on stilbene analogs as potential treatment agents for colon cancer
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Updated: Jun 11, 2026
Evaluating the Effectiveness of Cancer Drug Sensitization In Vitro and In Vivo
Published on: February 6, 2015
Shiby Paul1, Cassia S Mizuno, Hong Jin Lee
1Department of Chemical Biology, Ernest Mario School of Pharmacy, Rutgers, The State University of New Jersey, 164 Frelinghuysen Road, Piscataway, NJ 08854, USA.
Abstract:
Based on the potential of resveratrol as a colon cancer chemopreventive agent, a set of 26 stilbenes were synthesized and tested against the colon cancer cell lines HT-29 and Caco-2. (Z)-4-(3,5-Dimethoxystyryl)aniline (4), (Z)-methyl-4-(3,5-dimethoxystyryl)benzoate (6), and (Z)-1,3-dimethoxy-5-(4-methoxystyryl)benzene (10) showed strong inhibitory activity in vitro. In vivo studies using HT-29 xenografts in immunodeficient mice were conducted with 4, 6 and 10, together with their corresponding trans isomers (3, 5, and 9, respectively), at the dose of 10 mg/kg body weight. Tumor volume was significantly lowered in 3-, 4-, and 9-treated groups. The cis- and trans-amino analogs (4 and 3, respectively) had similar effect on tumor growth, a 40% decrease compared to the control. Analysis of the serum revealed that 4 isomerized to 3, which may explain their similar effects in SCID mice. Stilbenes 5, 6, 9, and 10 retained their configurations in the serum. Stilbenes 6 and 10 lacked tumor-suppressive effect in SCID mice; the serum levels of these analogs were low (18.8 and 15.5 ng/mL, respectively). Stilbene 9, while weakly active in vitro demonstrated good activity in vivo, was found at higher levels in the serum (69.9 ng/mL) compared to 10. The anti-tumorigenic activity of these stilbene analogs may be partly linked to their effects on proteins involved in cell proliferation, as observed by lowered expression of proliferating cell nuclear antigen and upregulation of the cyclin-dependent kinase inhibitor, p27, in the tumor tissues. Overall, identification of the anti-tumorigenic potential of these compounds provides opportunities for their use against colorectal cancer.
Insights
Researchers synthesized 26 stilbenes to combat colon cancer. Several compounds, particularly cis- and trans-amino analogs, showed significant tumor reduction in mice, offering new colorectal cancer treatment avenues.
Area of Science:
- Medicinal Chemistry
- Cancer Biology
- Pharmacology
Background:
- Resveratrol shows promise as a colon cancer chemopreventive agent.
- There is a need for novel therapeutic strategies against colorectal cancer.
Purpose of the Study:
- To synthesize and evaluate a series of stilbene analogs for their anti-colon cancer activity.
- To investigate the in vitro and in vivo efficacy of selected stilbenes against colon cancer cell lines and xenografts.
Main Methods:
- Synthesis of 26 stilbene analogs.
- In vitro testing against HT-29 and Caco-2 colon cancer cell lines.
- In vivo studies using HT-29 xenografts in immunodeficient mice, with serum analysis and tumor tissue examination.
Main Results:
- Compounds (Z)-4-(3,5-Dimethoxystyryl)aniline (4), (Z)-methyl-4-(3,5-dimethoxystyryl)benzoate (6), and (Z)-1,3-dimethoxy-5-(4-methoxystyryl)benzene (10) exhibited strong in vitro activity.
- Significant tumor volume reduction was observed in mice treated with stilbenes 3, 4, and 9.
- Cis- and trans-amino analogs (4 and 3) showed comparable tumor growth inhibition, with evidence of isomerization in vivo.
- Stilbenes 6 and 10 had low serum levels and lacked significant tumor-suppressive effects.
- Stilbene 9 displayed good in vivo activity despite weak in vitro effects, correlating with higher serum levels.
Conclusions:
- Several synthesized stilbene analogs possess significant anti-tumorigenic potential against colorectal cancer.
- The anti-tumor activity appears linked to modulation of cell proliferation markers, including decreased proliferating cell nuclear antigen and increased p27 expression.
- These findings highlight stilbene analogs as promising candidates for further development in colorectal cancer therapy.
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