PYRROLOQUINOLINE QUINONE (PQQ) AND MITOCHONDRIAL BIOGENESIS - Katiuscia Vella - ETHICA SOCIETAS-Rivista di scienze umane e sociali

New Perspectives for Cellular Metabolism and Longevity

Abstract: Mitochondrial function plays a central role in cellular physiology, energy metabolism, and aging processes. In recent years, pyrroloquinoline quinone (PQQ) has attracted increasing attention in nutritional and metabolic research due to its potential role in regulating mitochondrial function and mitochondrial biogenesis. Although sometimes referred to as “vitamin B14” in popular literature, PQQ is not officially recognized as an essential vitamin in humans. However, experimental evidence suggests that this molecule may modulate oxidative stress and influence the formation of new mitochondria. This article explores the biochemical properties of PQQ, the cellular mechanisms underlying mitochondrial biogenesis, and the potential implications for cellular health and longevity.

Keywords: #PQQ #Mitochondria #MitochondrialBiogenesis #EnergyMetabolism #OxidativeStress #CellularLongevity #KatiusciaVella #ethicasocietas #ethicasocietasjournal #scientificjournal #humansciences #socialsciences #ethicasocietasupli

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Introduction

Over the past decades, biomedical research has highlighted the fundamental role of mitochondria in cellular physiology and aging. These organelles are responsible for producing energy in the form of ATP (adenosine triphosphate) through oxidative phosphorylation.

Alterations in mitochondrial function have been linked to numerous pathological conditions, including neurodegenerative diseases, metabolic disorders, cardiovascular diseases, and age-related decline.

Among emerging bioactive compounds, PQQ has gained attention for its potential impact on mitochondrial metabolism. It is a natural redox compound found in small amounts in foods such as kiwi, green peppers, green tea, and fermented products.

Biochemical Characteristics of PQQ

Pyrroloquinoline quinone (PQQ) belongs to the family of redox-active molecules, characterized by their ability to participate in multiple oxidation–reduction cycles.

Unlike conventional antioxidants, which typically neutralize a single reactive oxygen species, PQQ can undergo repeated catalytic cycles, contributing to the regulation of oxidative stress at the cellular level.

Experimental studies suggest that PQQ may:

regulate oxidative stress
modulate cellular redox signaling
support mitochondrial function
influence gene expression related to energy metabolism

These properties have led to the hypothesis that PQQ may act as a bioactive compound with vitamin-like functions.

PQQ and Mitochondrial Biogenesis

One of the most studied aspects of PQQ is its potential role in mitochondrial biogenesis, the process by which cells generate new mitochondria.

This process is controlled by a network of transcriptional regulators, including:

PGC-1α (peroxisome proliferator-activated receptor gamma coactivator-1 alpha)
NRF-1 (nuclear respiratory factor-1)
TFAM (mitochondrial transcription factor A)

Research suggests that PQQ may activate these signaling pathways, promoting an increase in both the number and efficiency of mitochondria.

In animal models, dietary deficiency of PQQ has been associated with reduced mitochondrial density, while supplementation has shown beneficial effects on energy metabolism and mitochondrial performance.

Relationship Between PQQ and Coenzyme Q10

Coenzyme Q10 (ubiquinone) is a crucial component of the mitochondrial electron transport chain and plays a key role in ATP production.

While coenzyme Q10 primarily enhances the efficiency of existing mitochondria, PQQ appears to act upstream by promoting the formation of new mitochondria through mitochondrial biogenesis.

This complementary mechanism suggests that combining PQQ and coenzyme Q10 may support both mitochondrial efficiency and renewal.

Implications for Metabolic Health

Growing interest in mitochondrial function has led researchers to investigate PQQ in various areas of biomedical research, including:

energy metabolism
cognitive function
cardiovascular health
cellular aging

Preliminary human studies suggest that PQQ supplementation may influence biomarkers related to oxidative stress and mitochondrial activity. However, further large-scale clinical trials are needed to confirm these effects.

Conclusion

Pyrroloquinoline quinone (PQQ) represents an emerging molecule in the study of cellular metabolism and mitochondrial function.

Its redox properties and potential role in mitochondrial biogenesis make it a promising candidate in research on cellular longevity.

Although not classified as an essential vitamin, PQQ may play a significant role in supporting mitochondrial health.

Further clinical research is required to clarify its long-term impact and therapeutic potential.

REFERENCES

Chowanadisai, W. et al. (2010). PQQ stimulates mitochondrial biogenesis through CREB phosphorylation and increased PGC-1α expression. Journal of Biological Chemistry.
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