Anticancer Mechanisms

Primary Mechanisms

1. NF-κB inhibition

• Blocks upstream signalling that activates NF-κB

• Reduces inflammatory transcription programs that support tumour survival

• Lowers expression of anti-apoptotic proteins in multiple models

2. Multi-kinase and growth signalling inhibition

• Modulates EGFR, HER2, and VEGF-related signalling

• Suppresses PI3K/Akt/mTOR activity

• Inhibits MAPK/ERK and JAK/STAT3 pathways in several cancer models

3. Apoptosis induction

• Activates caspase-dependent cell death pathways

• Increases Bax/Bcl-2 ratio

• Promotes mitochondrial dysfunction in cancer cells

4. Cell-cycle arrest

• Modulates cyclins and cyclin-dependent kinases

• Can induce G1/S or G2/M arrest depending on the model

5. Anti-metastatic effects

• Inhibits MMP-2 and MMP-9

• Suppresses EMT-related signalling

• Reduces invasion and migration markers

6. Anti-angiogenic effects

• Lowers VEGF expression

• Reduces tumour-supporting blood vessel signalling

Secondary Mechanisms

• Epigenetic modulation

• Cancer stem-cell targeting

• Autophagy regulation

• Telomerase-related effects

• Immune-modulating activity

• Redox-dependent cytotoxicity

Mechanism Summary

Curcumin is best understood as a multi-pathway modulator rather than a single-target agent. That broad activity is part of its appeal, but it also means effects may vary by dose, cancer type, and tumour biology.

Key References

Curcumin (diferuloylmethane) inhibits NF-κB and IκK in mantle cell lymphoma
https://pubmed.ncbi.nlm.nih.gov/16023083/

Receptor Tyrosine Kinases and Curcumin in Cancer Therapy
https://www.frontiersin.org/journals/pharmacology/articles/10.3389/fphar.2021.772510/full

Curcumin induces apoptosis in HT-29 colon cancer cells
https://pmc.ncbi.nlm.nih.gov/articles/PMC2644749/

Anti-cancer Effects of Curcumin: Cycle of Life and Death
https://pmc.ncbi.nlm.nih.gov/articles/PMC2572158/

Antimetastatic Effects of Curcumin in Oral and Gastrointestinal Cancers
https://www.frontiersin.org/journals/pharmacology/articles/10.3389/fphar.2021.668567/full

Mechanistic insights of curcumin and its analogues in cancer
https://pubmed.ncbi.nlm.nih.gov/37649266/