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Curcumin can suppress metastasis of colorectal most cancers cells by activating a particular signaling pathway

LMU researchers have recognized a signaling pathway by way of which curcumin can suppress the metastasis of colorectal most cancers cells.

Colorectal most cancers is without doubt one of the commonest kinds of most cancers worldwide. In over half of all circumstances, an necessary protecting mechanism in cells is inactivated by mutations – the tumor suppressor gene p53. The product of this gene, a transcription issue, induces a microRNA molecule referred to as miR-34, which performs a important position in tumor suppression. A workforce led by Heiko Hermeking, Professor of Experimental and Molecular Pathology at LMU, has now demonstrated in cell cultures and in a mouse mannequin that curcumin, a pure substance discovered within the spice turmeric, can bridge this silenced protecting mechanism by activating an alternate, particular signaling pathway that induces the expression of miR-34.

There have been already indications within the literature that curcumin can induce miR-34, however there was no systematic investigation of the phenomenon prior to now. Furthermore, it was unclear what mechanism could possibly be behind it.”

Heiko Hermeking, Professor of Experimental and Molecular Pathology at LMU

Utilizing genetically-modified human colorectal most cancers cell strains, the researchers have now demonstrated that curcumin will increase the manufacturing of so-called reactive oxygen species (ROS) in tumor cells. These ROS activate a signaling pathway that results in the manufacturing of miR-34 by way of the transcription issue NRF2 – which then induces untimely growing older of the tumor cells and programmed cell demise. “Moreover, the power of tumor cells emigrate and invade into surrounding tissue is impaired,” says Hermeking. “We had been additionally in a position to affirm in our mouse mannequin that the curcumin-induced expression of miR-34 suppresses the metastasis of colorectal most cancers cells into the lung.” As well as, curcumin made tumor cells extra delicate to the chemotherapeutic substance 5-FU via miR-34.

An necessary facet of the outcomes is that these results are impartial of p53, which is commonly misplaced within the majority of tumor varieties and can be tough to reconstitute in all tumor cells. “With curcumin, we have discovered a substance with which we may intervene within the sign cascade beneath p53 by activating miR-34,” says Hermeking. In accordance with the authors, the outcomes of the research may give rise to attention-grabbing approaches for brand spanking new therapeutic choices, which ought to be pursued in additional research.


Ludwig-Maximilians-Universitaet Muenchen (LMU)

Journal reference:

Liu, C., et al. (2023). Curcumin prompts a ROS/KEAP1/NRF2/miR-34a/b/c cascade to suppress colorectal most cancers metastasis. Cell Loss of life & Differentiation.


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