# How does GHRP-6 influence mitochondrial health and bioenergetics in aging?

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Peptide Longevity Q&A · 2023-08-01


    Research indicates that GHRP-6, particularly through its receptor antagonist [D-Lys3]-GHRP-6, enhances hepatic fatty acid oxidation and gluconeogenesis, promoting mitochondrial function and energy metabolism in a growing pig model.

 What the research shows

The study investigated the effects of the ghrelin receptor antagonist [D-Lys3]-GHRP-6 (DLys) on energy metabolism in growing pigs. Over a seven-day period, pigs received intravenous injections of DLys at a dose of 6 mg/kg body weight. The researchers measured various metabolic parameters, including body weight gain, serum levels of non-esterified fatty acids (NEFA), insulin, and glucose, as well as liver transcriptome changes related to metabolic pathways. The results indicated that DLys treatment significantly reduced body weight gain and altered adipose histopathology, specifically reducing adipocyte size. Furthermore, DLys treatment led to increased serum levels of NEFA and insulin, hepatic glucose levels, and HOMA-IR, while decreasing serum total bile acid (TBA) levels after fasting. The liver transcriptome analysis revealed that DLys treatment promoted pathways associated with lipolysis, gluconeogenesis, and fatty acid oxidation.

 Why it matters for longevity

Understanding the role of GHRP-6 in enhancing mitochondrial health and bioenergetics is significant for longevity research. Mitochondrial dysfunction is often associated with aging and metabolic disorders. By promoting hepatic fatty acid oxidation and gluconeogenesis, GHRP-6 may help maintain energy balance and metabolic health as organisms age. Enhanced mitochondrial function can lead to improved cellular energy production, which is essential for maintaining overall health and potentially extending healthspan. The findings suggest that targeting ghrelin activity through GHRP-6 may offer a novel approach to improve metabolic health in aging populations.

 Key findings at a glance

GHRP-6 treatment reduced body weight gain in growing pigs.

Adipocyte size was significantly decreased in the DLys treatment group.

Serum NEFA and insulin levels increased, indicating enhanced fat mobilization.

Hepatic gluconeogenesis and fatty acid oxidation were promoted.

DLys treatment expanded oxidative phosphorylation in the liver.

Activation of the SIRT1 signaling pathway was observed.

 How GHRP-6 works (background)

GHRP-6, a growth hormone-releasing peptide, influences energy metabolism primarily through its action on the ghrelin receptor. By inhibiting ghrelin activity, GHRP-6 alters metabolic pathways that regulate energy intake and expenditure. The study showed that GHRP-6 treatment led to increased levels of proteins involved in fatty acid oxidation (CPT1A) and gluconeogenesis (G6PC), suggesting a shift towards enhanced energy production and utilization. The modulation of the SIRT1 signaling pathway further indicates that GHRP-6 may play a role in promoting mitochondrial function, which is crucial for cellular health and longevity.

 Safety, caveats, and what we don't yet know

While the findings provide insight into the metabolic effects of GHRP-6, it is important to note that this research was conducted in a preclinical model using growing pigs. The implications for human health and longevity remain to be fully understood. Further studies are needed to investigate the long-term effects of GHRP-6 and its safety profile in diverse populations, including older adults. Additionally, the specific mechanisms through which GHRP-6 influences mitochondrial health require further exploration.

 Bottom line

Research suggests that GHRP-6 enhances mitochondrial health and bioenergetics by promoting hepatic fatty acid oxidation and gluconeogenesis, which may have implications for longevity.

 Related questions

 Can GHRP-6 improve metabolic health in older adults?

While research indicates that GHRP-6 enhances metabolic parameters in growing pigs, its effects in older adults remain to be studied. Further research is needed to determine its potential benefits in this population.

 What role does ghrelin play in aging?

Ghrelin is involved in regulating energy balance and metabolism. Its role in aging is complex, as it may influence body weight, appetite, and metabolic health, warranting further investigation.

 How does mitochondrial function affect aging?

Mitochondrial function declines with age, leading to reduced energy production and increased oxidative stress. Maintaining mitochondrial health is crucial for promoting longevity and reducing age-related diseases.

 Source: PubMed · Peptides · published 2023-08-01.

## Sources

- PubMed · Peptides: https://pubmed.ncbi.nlm.nih.gov/37301480/