Mayo Clinic Research • Zombie Cell Clearance

Senolytics: Clearing Zombie Cells

Dasatinib + Quercetin clears senescent cells that accumulate with age and drive chronic inflammation. The 2015 breakthrough that's changing how we think about aging.

Last updated: March 2026

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D+Q Protocol
Per Day
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On Per Cycle
Then Weeks Off
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First Senolytic
Paper Year
Background

What Are Senolytics?

Senolytics are drugs that selectively clear senescent cells — "zombie cells" that have stopped dividing but refuse to die. Instead, they secrete inflammatory factors (the senescence-associated secretory phenotype, or SASP) that drive age-related diseases.

🧟 Zombie Cells

Senescent cells accumulate with age. They don't function but also don't die — hence "zombie." They secrete IL-6, TNF-α, and other inflammatory factors that accelerate aging.

💊 Dasatinib + Quercetin

The most studied senolytic combo. D (cancer drug) + Q (flavonoid). First shown to clear senescent cells in 2015 by Kirkland & Tchkonia at Mayo Clinic.

🔄 Hit-and-Run Protocol

Senolytics are not taken continuously. Protocol: 3 days on, weeks off. This allows new senescent cells to accumulate before the next cycle.

🧪 SASP Reduction

Senolytic treatment reduces SASP factors by ~50% in mouse studies. This lowers systemic inflammation and improves physical function.

Research

What the Research Shows

Senescent Cell Clearance (Mouse)
Mayo Clinic — multiple tissues
Significant
Physical Function Improvement (Mouse)
treadmill, grip strength
+30-40%
Human Pilot Study (IPF)
Idiopathic pulmonary fibrosis — improved walking distance
Positive
Human Pilot (Diabetic Kidney)
Reduced senescent cell markers
Positive

Breakthrough: The 2015 paper (Kirkland & Tchkonia) showed that clearing just 30% of senescent cells extended lifespan by 30% in mice. This launched the senolytic field.

Protocol

Dosing Protocol

📅 Standard D+Q Protocol
  • Dasatinib: 100mg (or 50-100mg)
  • Quercetin: 1000mg (or 500-1000mg)
  • • Take once daily for 3 consecutive days
  • • Then take 2-3 WEEKS off
  • • Repeat monthly or as needed
🔬 Alternative: Fisetin
  • • Natural senolytic (strawberries)
  • 20mg/kg once (or 500-2000mg)
  • • 2 consecutive days, then 2 weeks off
  • • See fisetin page for details

Important: Dasatinib requires prescription. Quercetin is OTC. Start low to assess tolerance. Must have medical supervision for D portion.

Safety

Side Effects

⚠️ Medical Supervision Required

Dasatinib: Prescription cancer drug — requires doctor oversight
Bone marrow suppression: Possible cytopenias
Fluid retention: Monitor for edema
Quercetin: Generally well-tolerated
Off-label use: Senolytic protocols are experimental

Bottom Line

Key Takeaways

✅ What We Know
  • First senolytic combo (D+Q) proven in 2015
  • 30% lifespan extension in mice
  • Reduces SASP inflammation markers
  • Improves physical function in animal models
  • Early human trials show safety signal
⚠️ What We Don't Know
  • Optimal dosing frequency in humans
  • Long-term effects of repeated clearing
  • Whether it extends human lifespan
  • Ideal age to start
Products

🛒 Recommended Products

🧪 QuercetinSenolytic flavonoid
🍓 Fisetin
Natural senolytic
Related

Related Resources

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⚠️ Disclaimer

This page is for educational purposes only. Dasatinib is a prescription cancer drug. Never use without medical supervision. Consult a healthcare provider.