Lifespan and Healthspan Impact of PQQ and IPQ
Researchers in Japan explored the effects of lifelong supplementation with PQQ (Pyrroloquinoline quinone) and IPQ (Imidazopyrroloquinoline) on lifespan and healthspan in mice. They also evaluated whether initiating supplementation in middle age could enhance muscle function and decrease age-related fat accumulation.
Key Findings
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Lifespan and Physical Activity:
- Mice consuming PQQ had longer lifespans, increased physical activity, and better neuromuscular function according to Atsushi Sugimoto from Mitsubishi Gas Chemical.
- PQQ not only extended lifespan but also improved quality of life, which is significant in aging research.
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Mechanisms of Action:
- PQQ acts as a potent antioxidant, promotes the formation of new mitochondria, and supports brain health.
- IPQ, formed from PQQ and glycine, retains several biological effects but lacks PQQ’s redox activity.
Experimental Design
- Test Subjects:
- The study used SAMP8 mice, which have shorter lifespans and age-related conditions similar to older humans.
- Supplementation:
- Two experiments were conducted: lifelong supplementation starting shortly after weaning and midlife supplementation beginning around seven months of age.
Results
- Healthy Aging Markers:
- Lifelong supplementation with either PQQ or IPQ reduced midlife mortality, delayed aging signs, and preserved muscle function. This included maintaining a healthy coat and reducing physical aging indicators.
- Both compounds restored muscle performance in middle-aged mice to levels comparable to younger mice after just six weeks of supplementation.
- PQQ appeared to maintain healthy fat stores, while IPQ was linked to reduced fat accumulation, especially in the liver.
Mechanisms of Action
- Inflammation and Muscle Function:
- Both PQQ and IPQ may combat aging by mitigating ‘inflammaging.’ PQQ’s anti-inflammatory properties may arise from its ability to suppress NF-κB, a critical inflammatory regulator.
- PQQ also helps protect mitochondria and reduce cellular oxidative stress. Although IPQ’s specific mechanisms are less studied, it has been shown to protect nerve and liver cells from oxidative damage and promote mitochondrial health.
Conclusion and Future Directions
While PQQ and IPQ exhibited distinct effects regarding lifespan extension, both effectively reduced early mortality rates in mice. Further research is necessary to clarify optimal dosages, long-term safety, and their precise mechanisms of action before human applications can be considered.
Source: Food & Function; doi: 10.1039/D6FO00788K
“Pyrroloquinoline quinone and imidazopyrroloquinoline intake diminish mortality risk during midlife and improve muscular dysfunctions with age in mice.”
