Luteolin and Cellular Senescence: Evidence for a Natural Senolytic
Expert Summary
Luteolin inhibits BCL-2 at IC50 ~16 μM and BCL-XL at ~20 μM — similar potency to quercetin for BCL-2 family inhibition. It also inhibits NF-κB and NLRP3, providing direct SASP suppression alongside its senolytic mechanism. Human bioavailability is low (~5%) from standard forms but is improved with fat co-administration.
Key Facts
- BCL-2 family inhibition: Luteolin inhibits BCL-2 at concentrations achievable with high-dose supplementation. Its binding profile overlaps significantly with quercetin, making them mechanistically similar but not identical.
- SASP suppression: Luteolin is one of the most potent natural NF-κB inhibitors, with IC50 for NF-κB nuclear translocation around 2 μM. This direct SASP suppression is independent of its senolytic mechanism.
- NLRP3 inhibition: Luteolin inhibits NLRP3 inflammasome assembly at 10–25 μM — similar to quercetin. This gives it dual anti-inflammatory coverage (NF-κB + NLRP3).
- Food sources: Celery (338 μg/g), parsley (1282 μg/g), artichoke (900 μg/g), thyme (1200 μg/g), and chamomile tea contain luteolin in meaningful amounts.
- Neuroprotection: Luteolin crosses the blood-brain barrier and reduces neuroinflammation via microglial suppression. It has been studied specifically for autism-spectrum neuroinflammation and has a clean safety record.
- Combination with quercetin: Luteolin and quercetin share mechanisms and food sources. Some practitioners use luteolin as an alternative or addition to quercetin in natural senolytic protocols.
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Frequently Asked Questions
Should I use luteolin instead of quercetin?
Quercetin has significantly more clinical senolytic evidence (D+Q trials) than luteolin. Luteolin may be used as a supplementary agent alongside quercetin or as a quercetin complement for anti-inflammatory purposes.
What dose of luteolin is needed for senolytic effects?
No established human senolytic dose exists. Based on BCL-2 IC50 values, doses of 500–1,000 mg/day would be needed to approach relevant plasma concentrations — above typical supplement doses.
Scientific References
- Dirscherl K et al. Luteolin triggers global changes in the microglial transcriptome leading to a unique anti-inflammatory and neuroprotective gene expression profile. Journal of Neuroinflammation. 2010. PMID: 20074346