Endogenous antimicrobial peptide (host defense)
Cathelicidin
A human cathelicidin peptide with antimicrobial and immunomodulatory roles; therapeutic use remains investigational.
- Evidence:
- Early-stage human research
- Status:
- Research-stage
- Reviewed:
- 2026-08-03
Also known as: Cathelicidin, Human cationic antimicrobial peptide
What is Cathelicidin?
A human cathelicidin peptide with antimicrobial and immunomodulatory roles; therapeutic use remains investigational.
This profile is educational. It organizes publicly discussed research context for Cathelicidin and related naming aliases — it is not a treatment guide.
Proposed mechanism
Direct antimicrobial activity, immune cell recruitment, wound healing promotion, and inflammation regulation.
Mechanism language on PepGuide describes how researchers discuss pathways. Proposed mechanisms can change as evidence evolves.
Current research notes
Human evidence grade: Early-stage human research
Preclinical evidence grade: Moderate human evidence
LL-37 is endogenously produced and studied for wound healing, infection defense, and inflammatory diseases. Exogenous therapeutic applications are investigational. Effects are context-dependent with potential pro-inflammatory roles at high concentrations. Human evidence for supplemental use is insufficient.
Key uncertainties
- Safe exogenous use in humans
- Indication-specific effects
Research areas being studied
- Wound healing
- Antimicrobial defense
- Autoimmune skin conditions
Being studied for a topic is not the same as proven benefit in that topic. Prefer primary literature for study design, endpoints, and limitations.
Safety & side-effect notes
Reported or discussed adverse effects
- Local irritation in topical research
- Systemic use not established
Additional risks & considerations
- Dual pro/anti-inflammatory effects
- No approved therapeutic formulation
Regulatory status
Research-stage
Regulatory framing here is educational and can lag policy changes. Check official sources for current status.
Frequently asked questions
What is Cathelicidin?
A human cathelicidin peptide with antimicrobial and immunomodulatory roles; therapeutic use remains investigational.
How does Cathelicidin work (proposed mechanism)?
Direct antimicrobial activity, immune cell recruitment, wound healing promotion, and inflammation regulation.
What is Cathelicidin being researched for?
Cathelicidin has been discussed in research contexts including: Wound healing, Antimicrobial defense, Autoimmune skin conditions.
What does current evidence say about Cathelicidin?
Early-stage human research. LL-37 is endogenously produced and studied for wound healing, infection defense, and inflammatory diseases. Exogenous therapeutic applications are investigational. Effects are context-dependent with potential pro-inflammatory roles at high concentrations. Human evidence for supplemental use is insufficient.
What safety considerations are noted for Cathelicidin?
Reported or discussed considerations include: Local irritation in topical research; Systemic use not established; Dual pro/anti-inflammatory effects; No approved therapeutic formulation. This is educational information, not medical advice.
References & sources
- Overhage J et al. (2008). LL-37: host defense peptide with immunomodulatory properties — Cell Mol Life Sci. Evidence type: review.
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Educational and research information only. PepGuide does not sell or prescribe peptides, diagnose conditions, or provide personalized medical advice. Evidence summaries may include early-stage, animal, or limited human research — none of that is a substitute for primary literature or clinician guidance.