Related Experiment Video
Updated: Apr 21, 2026
A Mouse Model of Orthopedic Surgery to Study Postoperative Cognitive Dysfunction and Tissue Regeneration
Published on: February 27, 2018
The antiaging activity and cerebral protection of rapamycin at micro-doses
Haiyan Qi1, Feng-Yun Su, Shan Wan
1Springcell Corporation, Dayton, NJ, USA.
Background And Purpose:
The immunosuppressant drug rapamycin was reported to have an antiaging activity, which was attributed to the TORC1 inhibition that inhibits cell proliferation and increases autophagy. However, rapamycin also exhibits a number of harmful adverse effects. Whether rapamycin can be developed into an antiaging agent remains unclear.
Methods And Results:
We demonstrated that rapamycin at micro-doses (below the TORC1 inhibiting concentration) exhibits a cell-protective activity: (1) It protects cultured neurons against neurotoxin MPP(+) and H2O2. (2) It increases survival time of neuron in culture. (3) It maintains the nonproliferative state of cultured senescent human fibroblasts and prevents cell death induced by telomere dysfunction. (4) In animal models, it decreased the cerebral infarct sizes induced by acute ischemia and dramatically extended the life span of stroke prone spontaneously hypertensive rats (SHR-SPs).
Conclusion:
We propose that rapamycin at micro-dose can be developed into an antiaging agent with a novel mechanism.
Insights
Micro-doses of rapamycin show cell-protective and antiaging effects by preserving neurons and extending lifespan in animal models, suggesting a novel therapeutic approach.
Area of Science:
- Gerontology
- Pharmacology
- Neuroscience
Background:
- Rapamycin, an immunosuppressant, has shown antiaging potential via TORC1 inhibition, but adverse effects limit its use.
- The precise mechanism and therapeutic viability of rapamycin as an antiaging agent remain under investigation.
Purpose of the Study:
- To investigate the potential of rapamycin at micro-doses as an antiaging agent.
- To explore the cell-protective and life-extending properties of low-dose rapamycin.
Main Methods:
- Assessed rapamycin's effects on cultured neurons exposed to neurotoxins.
- Evaluated rapamycin's impact on senescent human fibroblasts and telomere dysfunction.
- Tested rapamycin's efficacy in animal models of ischemia and stroke.
Main Results:
- Micro-dose rapamycin protected cultured neurons from MPP(+) and H2O2-induced toxicity.
- It extended neuronal survival in vitro and maintained senescent fibroblasts.
- In vivo, it reduced infarct size and significantly extended lifespan in stroke-prone rats.
Conclusions:
- Rapamycin at micro-doses exhibits significant cell-protective and antiaging activities.
- This suggests a novel therapeutic strategy for developing rapamycin into an antiaging agent.
