Thalidomide suppresses the interleukin 1beta-induced NFkappaB signaling pathway in colon cancer cells
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Updated: Aug 8, 2026

Induction of Murine Intestinal Inflammation by Adoptive Transfer of Effector CD4+CD45RBhigh T Cells into Immunodeficient Mice
Published on: April 21, 2015
Soo Hyun Jin1, Tae Il Kim, Dong Soo Han
1Department of Internal Medicine and Institute of Gastroenterology, Brain Korea 21 Project for Medical Science, Yonsei University College of Medicine, Seoul, Korea.
Insights
Thalidomide, an anti-inflammatory drug, inhibits the NF-kappaB pathway by targeting IKK. This action suppresses key signaling events, offering insights into its therapeutic mechanisms for various diseases.
Area of Science:
- Molecular Biology
- Immunology
- Pharmacology
Background:
- Thalidomide exhibits anti-inflammatory and antiangiogenic properties across diverse diseases.
- The precise cellular targets and mechanisms underlying thalidomide's effects remain largely unelucidated.
Purpose of the Study:
- To investigate the molecular mechanism of thalidomide action.
- To explore the role of the Nuclear Factor kappa B (NF-kappaB) pathway in thalidomide's effects.
Main Methods:
- Utilized Caco-2 colon cancer cells to study thalidomide's impact on NF-kappaB signaling.
- Assessed thalidomide's inhibition of interleukin (IL)-1beta-induced NF-kappaB transcriptional activation and IL-8 production.
- Monitored NF-kappaB nuclear translocation, Inhibitor of kappa B (IkappaB) degradation, and NF-kappaB-inducing kinase (NIK)-induced NF-kappaB activation.
Main Results:
- Thalidomide significantly inhibited IL-1beta-induced NF-kappaB transcriptional activation and IL-8 production in Caco-2 cells.
- The drug suppressed the nuclear translocation of NF-kappaB and the degradation of IkappaB.
- Thalidomide also attenuated NIK-induced NF-kappaB transcriptional activation, indicating an upstream effect.
Conclusions:
- The findings suggest that IkappaB kinase (IKK) phosphorylation of IkappaB is a potential molecular target for thalidomide.
- This phosphorylation event, occurring after NIK activation and before IkappaB degradation, is crucial in the NF-kappaB pathway.
- Understanding this mechanism provides critical insights into thalidomide's anti-inflammatory actions and potential therapeutic applications.
Abstract:
Thalidomide has been shown to have both antiinflammatory and antiangiogenic effects in several diseases. However, its cellular target and mechanism of action are poorly understood. We investigated the action mechanism of thalidomide through the NFkappaB pathway. Thalidomide inhibited interleukin (IL) 1beta-induced NFkappaB transcriptional activation and IL-8 production in Caco-2 colon cancer cells. In addition, thalidomide suppressed NFkappaB nuclear translocation, IkappaB degradation, and NFkappaB-inducing kinase (NIK)-induced NFkappaB transcriptional activation. These results suggest that the molecular target of the effects of thalidomide may be IkappaB phosphorylation by IkappaB kinase (IKK), whose activation follows NIK activation and precedes IkappaB degradation in the NFkappaB pathway.
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