# Does GHRP-2 reduce inflammaging in older adults?

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Peptide Longevity Q&A · 2009-12-01


    Research indicates that GHRP-2 has antioxidant effects, decreasing vascular oxidative stress and inflammatory markers in a mouse model. However, it does not reduce atherosclerosis, suggesting that while it may combat aspects of inflammaging, its overall antiatherogenic efficacy is limited.

 What the research shows

The study investigated the effects of Growth Hormone-Releasing Peptide-2 (GHRP-2) on oxidative stress and atherosclerosis in ApoE(-/-) mice, a model commonly used to study cardiovascular disease. GHRP-2 was administered subcutaneously at a dose of 20 micrograms twice daily for 12 weeks. The researchers measured circulating levels of insulin-like growth factor 1 (IGF-I), interferon-gamma, and aortic superoxide production, among other parameters. The findings revealed that GHRP-2 significantly increased circulating IGF-I levels and reduced interferon-gamma levels by 66%. Notably, while GHRP-2 decreased aortic superoxide production, it did not significantly alter the area of atherosclerotic plaques.

 Why it matters for longevity

The findings from this research suggest that GHRP-2 may play a role in mitigating oxidative stress, which is a contributing factor to aging and chronic inflammatory conditions, often referred to as inflammaging. By decreasing oxidative stress markers and inflammatory cytokines, GHRP-2 may have potential implications for improving vascular health in aging populations. However, the lack of reduction in atherosclerotic plaque formation indicates that while GHRP-2 may influence some aspects of vascular health, its overall impact on long-term cardiovascular outcomes remains unclear. This highlights the complexity of aging and the multifaceted nature of interventions aimed at promoting longevity.

 Key findings at a glance

GHRP-2 increased circulating IGF-I levels by 1.2 to 1.6-fold.

Interferon-gamma levels were reduced by 66% following GHRP-2 administration.

GHRP-2 decreased aortic superoxide production, indicating antioxidant effects.

No significant reduction in atherosclerotic plaque area was observed.

GHRP-2 reduced gene expression of inflammatory markers in the aorta.

In vitro, GHRP-2 prevented oxidative damage in aortic smooth muscle cells.

 How GHRP-2 works (background)

GHRP-2 is a synthetic peptide that stimulates the release of growth hormone (GH) from the pituitary gland, which in turn increases levels of IGF-I, a hormone with various growth-promoting effects. Additionally, GHRP-2 binds to CD36, a receptor involved in the uptake of oxidized low-density lipoprotein (OxLDL), which is associated with atherosclerosis. By inhibiting the uptake of OxLDL and reducing oxidative stress, GHRP-2 may exert protective effects on vascular tissues. The observed reduction in markers of inflammation and oxidative stress suggests that GHRP-2 could have beneficial effects on vascular health, although its efficacy in preventing atherosclerosis remains limited.

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

While the study provides insights into the potential benefits of GHRP-2, it is important to note that the research was conducted in a specific mouse model. The implications for human health, particularly in older adults, are not yet fully understood. Further research is necessary to investigate the long-term safety and efficacy of GHRP-2 in diverse populations, including those with existing cardiovascular conditions. Additionally, the effects of GHRP-2 on other age-related diseases and its interaction with various biological pathways involved in aging remain to be explored.

 Bottom line

GHRP-2 appears to have antioxidant properties that may help combat aspects of inflammaging, but it does not reduce atherosclerosis in the studied model, indicating limitations in its antiatherogenic potential.

 Related questions

 Can GHRP-2 enhance muscle recovery in aging individuals?

Research suggests that GHRP-2 may promote growth hormone release, potentially aiding muscle recovery. However, studies specifically examining its effects on muscle recovery in aging populations are limited.

 What are the effects of GHRP-2 on metabolic health?

GHRP-2 has been shown to influence insulin-like growth factor levels, which can affect metabolic processes. However, comprehensive studies on its direct effects on metabolic health in aging individuals are still needed.

 Is GHRP-2 safe for long-term use in older adults?

Current research does not provide sufficient data on the long-term safety of GHRP-2 in older adults. Further studies are necessary to evaluate potential risks and benefits over extended periods.

 Source: PubMed · Endocrinology · published 2009-12-01.

## Sources

- PubMed · Endocrinology: https://pubmed.ncbi.nlm.nih.gov/19819949/