Dermcidin
Also known as: DCD-1L
Dermcidin is a naturally occurring antimicrobial peptide produced by human eccrine sweat glands that provides broad-spectrum protection against bacterial and fungal pathogens on the skin surface.
Dermcidin is a 4756.4 Da research peptide. Dermcidin is a naturally occurring antimicrobial peptide produced by human eccrine sweat glands that provides broad-spectrum protection against bacterial and fungal pathogens on the skin surface.
Also called: DCD-1L
4756.4
Molecular Weight
Daltons
3
Strong Evidence
benefits
4
Studies Cited
peer-reviewed
1-32
Typical Dose
μg/mL
Overview
Dermcidin represents one of the human body's primary antimicrobial defense mechanisms, secreted continuously through sweat to maintain skin barrier function. This 47-amino acid peptide exhibits unique pH-dependent activity, remaining stable and active in the acidic environment of human sweat where most other antimicrobial peptides would denature. Unlike conventional antibiotics, dermcidin disrupts pathogen cell membranes through direct interaction with lipid bilayers, making resistance development significantly more difficult. Research applications focus on understanding natural antimicrobial resistance, developing novel topical treatments, and investigating sweat-based immune responses. The peptide's ability to maintain antimicrobial activity at physiological salt concentrations and acidic pH makes it particularly valuable for studying skin microbiome regulation and developing treatments for antibiotic-resistant skin infections.
Key Takeaways: Dermcidin
- Strongest evidence supports Dermcidin for broad-spectrum antimicrobial activity and ph-stable antimicrobial function
- Research doses typically range from 1 to 32 μg/mL via in vitro
- 3 benefits with strong evidence, 3 moderate, 1 preliminary
- Half-life: 2-4 hours in sweat, 30-60 minutes in serum
- 4 cited research studies in this guide
Mechanism of Action
Dermcidin functions through membrane permeabilization and disruption of bacterial cell wall integrity. The peptide adopts an amphipathic alpha-helical structure that inserts into bacterial membranes, forming oligomeric pores that cause cell lysis. Its cationic nature allows selective targeting of negatively charged bacterial membranes while sparing mammalian cells. The peptide maintains activity across a wide pH range (4.0-7.0) and high salt concentrations, making it uniquely suited for the harsh environment of human sweat.
Research Benefits
Dermcidin at a Glance
Dermcidin functions through membrane permeabilization and disruption of bacterial cell wall integrity.
Broad-spectrum antimicrobial activity
Strong EvidenceDemonstrates potent activity against gram-positive bacteria including Staphylococcus aureus, Enterococcus faecalis, and gram-negative pathogens like Escherichia coli and Pseudomonas aeruginosa with minimum inhibitory concentrations ranging from 2-16 μg/mL
pH-stable antimicrobial function
Strong EvidenceMaintains antimicrobial potency in acidic environments (pH 4.5-6.5) typical of human sweat, unlike most other antimicrobial peptides that lose activity under acidic conditions
Salt-resistant activity
Strong EvidenceRetains antimicrobial effectiveness in high-salt conditions up to 150 mM NaCl, making it functional in physiological sweat concentrations where other peptides become inactive
Antifungal properties
Moderate EvidenceExhibits significant antifungal activity against Candida albicans and dermatophyte species through membrane disruption mechanisms similar to its antibacterial effects
Biofilm disruption
Moderate EvidenceShows ability to penetrate and disrupt established bacterial biofilms, particularly those formed by Staphylococcus epidermidis and other skin commensals that become pathogenic
Resistance to proteolytic degradation
Moderate EvidenceDemonstrates stability against common skin proteases and maintains activity in the presence of sebaceous secretions and keratinocyte debris
Wound healing support
PreliminaryMay promote wound healing through antimicrobial protection and modulation of inflammatory responses, though direct healing mechanisms require further investigation
Research Dosing Protocols
Research Purposes Only: All content is for informational and research purposes only. This site does not provide medical advice, diagnosis, or treatment. Consult a qualified healthcare professional before using any peptide or supplement.
| Research Protocol | Dose Range | Route |
|---|---|---|
| Antimicrobial susceptibility testing | 1–32 μg/mL | in vitro |
| Topical antimicrobial research | 10–100 μg/mL | topical |
| Cell culture studies | 0.5–16 μg/mL | in vitro |
| Biofilm disruption studies | 4–64 μg/mL | in vitro |
Frequency
Single application or continuous exposure depending on research protocol
Timing
Applied directly to test systems or incorporated into culture media
Cycle Length
Duration varies by experimental design, typically 24-72 hours for antimicrobial assays
Research Notes
- 1Peptide activity is pH-dependent and optimal at pH 5.5-6.5
- 2Higher concentrations may be required in high-salt conditions
- 3Store reconstituted solutions at 4°C and use within 48 hours
- 4Avoid freeze-thaw cycles which may reduce activity
Reconstitution Guide
Standard Reconstitution
Vial Size
1 mg
Bacteriostatic Water
1 mL
Concentration
10 mcg
per 0.1 mL (10 units)
Step-by-Step Guide
Gather Materials
Dermcidin vial, bacteriostatic water, alcohol swabs, insulin syringes.
Equilibrate Temperature
Remove the vial from storage and allow it to reach room temperature (5-10 minutes).
Sanitize
Swab the rubber stopper of both the peptide vial and bacteriostatic water vial with alcohol.
Draw Water
Draw 1 mL of bacteriostatic water into a syringe.
Add Water to Vial
Insert the needle into the peptide vial and direct the water stream against the glass wall — not directly onto the powder.
Mix Gently
Swirl the vial gently until the powder is fully dissolved. Never shake. The solution should be clear and colorless.
Store Properly
Refrigerate at 2-8°C. 2 years lyophilized, 48 hours reconstituted at 4°C.
Storage Temperature
2-8°C
Shelf Life
2 years lyophilized, 48 hours reconstituted at 4°C
Important Notes
- •Reconstitute with sterile water or appropriate buffer at pH 6.0
- •Gentle mixing recommended to avoid peptide aggregation
- •Reconstituted solutions should be used promptly
- •Lyophilized powder should be stored with desiccant
Dermcidin Dosing Calculator
Calculate daily intake, cycle totals, and vials needed with pre-filled protocols →
Dermcidin Reconstitution Calculator
Calculate concentration, syringe units, and doses per vial with auto-filled values →
Safety & Side Effects
Reported Side Effects
- !Skin irritation at high concentrations
- !Contact dermatitis in sensitive individuals
- !Local inflammation with repeated application
- !Potential allergic reactions
- !Disruption of beneficial skin microbiome
- !Cytotoxicity to keratinocytes at concentrations >50 μg/mL
- !Hemolysis at very high concentrations
- !Ocular irritation if contact occurs
Potential Interactions
- ⚡Reduced activity in presence of divalent cations (Ca²⁺, Mg²⁺)
- ⚡Potential antagonism with anionic surfactants
- ⚡Activity may be reduced by high protein concentrations
- ⚡Interaction with other cationic antimicrobials may cause precipitation
Important: Side effects and interactions listed here are compiled from published research and community reports. This is not a complete list. No formal drug interaction studies have been conducted for most research peptides. Always consult a qualified healthcare provider.
Research Studies
The following studies are referenced in this profile. PubMed IDs are provided where available for independent verification.
Human dermcidin-derived antimicrobial peptides are active against Staphylococcus aureus
First characterization of dermcidin's antimicrobial properties against major skin pathogens including antibiotic-resistant strains
The antimicrobial peptide dermcidin is constitutively produced by eccrine sweat glands
Demonstrated continuous production of dermcidin in human sweat and its role in maintaining skin antimicrobial barrier
pH-dependent antimicrobial activity of human dermcidin against bacterial skin pathogens
Detailed analysis of dermcidin's pH-dependent activity and mechanism of action against various bacterial species
Structure and mechanism of the dermcidin antimicrobial peptide
Structural analysis revealing dermcidin's membrane interaction mechanisms and oligomerization patterns
Note: This is not an exhaustive list of all published research. Studies are selected for relevance and quality. Click PubMed IDs to verify sources independently. Inclusion does not imply endorsement of the peptide for any clinical use.
Frequently Asked Questions
Dermcidin remains active in acidic, high-salt conditions typical of human sweat, while most antimicrobial peptides lose activity under these conditions. This unique stability allows it to function as a continuous antimicrobial barrier on skin surfaces.
Dermcidin is primarily used for research purposes. While it shows antimicrobial activity against skin pathogens, clinical applications require extensive safety testing and regulatory approval.
Dermcidin disrupts bacterial cell membranes through direct physical interaction, making it difficult for bacteria to develop resistance compared to antibiotics that target specific metabolic pathways.
Research shows antimicrobial activity at concentrations ranging from 2-16 μg/mL against most common skin pathogens, with higher concentrations needed for more resistant strains.
Dermcidin shows cytotoxicity to mammalian cells at concentrations above 50 μg/mL, so research protocols should use appropriate concentrations and include cytotoxicity controls.
Reconstituted dermcidin should be stored at 2-8°C and used within 48 hours. Avoid freeze-thaw cycles which can reduce peptide activity.
Research demonstrates antifungal activity against Candida albicans and certain dermatophytes, though antibacterial activity appears more potent than antifungal effects.
Studies show dermcidin can penetrate and disrupt established biofilms, particularly those formed by Staphylococcus species, making it useful for biofilm research applications.
Research & Educational Use Only
All content is for informational and research purposes only. This site does not provide medical advice, diagnosis, or treatment. Consult a qualified healthcare professional before using any peptide or supplement.
The information presented here is compiled from published research studies and is intended for informational purposes only. Individual results may vary. Always consult with a licensed healthcare provider.