Piperlongumine — The Senolytic Alkaloid
Piperlongumine is a natural alkaloid derived from the long pepper plant that has recently been identified as a senolytic agent. By selectively clearing senescent cells, it holds potential for mitigating age-related tissue dysfunction and promoting longevity.
Mechanism of Action
Piperlongumine acts as a senolytic by selectively inducing apoptosis in senescent cells. It modulates intracellular reactive oxygen species (ROS) and inhibits the PI3K/Akt/mTOR signaling pathway. Furthermore, it downregulates anti-apoptotic proteins such as those in the Bcl-2 family, lowering the apoptotic threshold of senescent cells. The exact mechanism of action in humans remains poorly characterised.
Human Trial Evidence
No published human longevity trials. Animal/in-vitro evidence only.
Dosing Protocol
Unestablished in humans. Preclinical animal models typically use oral doses ranging from 2.5 to 5 mg/kg/day. Clinical dose-finding and safety protocols are yet to be determined.
Safety & Contraindications
Safety, adverse effects, and contraindications in humans are unestablished. Given its mechanism of ROS modulation, it may interact with antioxidant supplements or chemotherapeutic agents. It should be avoided by pregnant or breastfeeding women and those with liver impairment until clinical safety is proven.