# How does LL-37 contribute to tissue regeneration and wound repair with age?

Canonical source: https://retacompare.com/research/how-does-ll-37-contribute-to-tissue-regeneration-and-wound-repair-with-age

Peptide Longevity Q&A · 2026-02-01


    Research indicates that LL-37, an antimicrobial peptide produced by mesenchymal stem cells, plays a significant role in tissue regeneration and wound repair, particularly in the context of infectious diseases such as HACEK endocarditis.

 What the research shows

The narrative review explores the therapeutic potential of mesenchymal stem cells (MSCs) in treating HACEK endocarditis, emphasizing their immunomodulatory properties and ability to aid tissue repair. The study highlights the antimicrobial peptides (AMPs) produced by MSCs, including LL-37, which demonstrate efficacy against a wide range of microorganisms. It discusses how LL-37 and other AMPs can influence MSC behavior, including their proliferation and migration, which is critical for effective tissue regeneration and repair in the face of infection.

 Why it matters for longevity

The findings regarding LL-37 and its role in tissue regeneration are significant for longevity as they suggest that enhancing the function of MSCs and their AMPs might mitigate age-related tissue damage. As individuals age, the body's ability to repair tissues decreases, leading to various health issues. LL-37's involvement in promoting tissue repair and reducing inflammation could potentially improve healthspan by maintaining tissue integrity and function in older adults.

 Key findings at a glance

LL-37 is an antimicrobial peptide produced by mesenchymal stem cells (MSCs).

MSCs possess immunomodulatory properties that aid in tissue repair.

LL-37 demonstrates efficacy against a broad spectrum of microorganisms.

AMPs, including LL-37, influence MSC proliferation and migration.

Preclinical studies suggest LL-37 can reduce inflammation and enhance cardiac function.

These findings indicate a broader biological impact of LL-37 beyond antimicrobial activity.

 How LL-37 works (background)

LL-37 is a member of the cathelicidin family of antimicrobial peptides, known for their ability to combat infections and modulate immune responses. It is produced by various cells, including mesenchymal stem cells, and plays a crucial role in the innate immune system. LL-37 not only exhibits direct antimicrobial activity against bacteria, fungi, and viruses but also interacts with immune cells to promote healing and tissue regeneration. This dual function makes LL-37 a focal point in research related to infectious diseases and tissue repair.

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

While the research highlights the potential benefits of LL-37 in tissue regeneration, it is important to note that the findings are primarily based on preclinical studies. There is limited data regarding the long-term safety and efficacy of LL-37 in human populations, particularly in older adults. Further research is needed to understand the full implications of LL-37 in various contexts of aging and to establish appropriate dosing and delivery methods for therapeutic use.

 Bottom line

LL-37 contributes to tissue regeneration and wound repair, particularly in the context of infections like HACEK endocarditis, suggesting its potential role in enhancing healthspan and mitigating age-related tissue damage.

 Related questions

 Can LL-37 enhance recovery from age-related injuries?

Research suggests that LL-37 may support recovery from injuries by promoting tissue repair mechanisms, although specific studies in age-related contexts are still needed.

 Does LL-37 have a role in reducing inflammation in older adults?

LL-37 has been shown to reduce inflammation in various models, indicating potential benefits for older adults, but further research is necessary to confirm these effects in human populations.

 What is the relationship between LL-37 and mesenchymal stem cells?

LL-37 is produced by mesenchymal stem cells and plays a role in their function, influencing their ability to proliferate and migrate, which is critical for tissue repair.

 Source: PubMed · J Cardiothorac Surg · published 2026-02-01.

## Sources

- PubMed · J Cardiothorac Surg: https://pubmed.ncbi.nlm.nih.gov/41622193/