Dermcidin
Evidence: C+Antimicrobial / Innate-Defense Peptides
Evidence Snapshot
What this grade covers
Stream 1 (antimicrobial/sweat-gland biology, the only graded/claim-bearing stream) composite: identity/processing B; DCD-1/DCD-1L antimicrobial activity B-; DCD-1L mechanism B; human atopic-dermatitis association C. Stream 2 (cancer-biology) and Stream 3 (SPP/neuroprotective) are NOT graded -- Stream 2 is risk/context only, Stream 3 generates no public content at all.
Regulatory Context
Endogenous human peptide; no native dermcidin drug product approval record identified in this review.
Research Takeaway
Dermcidin is a 110-amino-acid preproprotein constitutively expressed and secreted by human eccrine sweat glands, proteolytically processed in sweat into at least 14 distinct peptide forms, of which DCD-1 and DCD-1L are the two best-characterized antimicrobial fragments.
Evidence boundary: Must not be simplified to imply only two fragments exist -- at least 14 are documented.
See all 5 evidence claims →Quick Summary
Dermcidin is a human eccrine-sweat-gland-secreted antimicrobial peptide precursor, proteolytically processed into at least 14 distinct peptide fragments, of which DCD-1 and DCD-1L (one additional C-terminal leucine) are the two best-characterized antimicrobial forms. A separate, unrelated proteolytic product of the same gene has its own distinct cancer-biology research literature, presented here only as risk/context, never as supportive of dermcidin's antimicrobial role.
Mechanism & Research Overview
Dermcidin is a human eccrine-sweat-gland-secreted antimicrobial peptide precursor, proteolytically processed into at least 14 distinct peptide fragments, of which DCD-1 and DCD-1L (one additional C-terminal leucine) are the two best-characterized antimicrobial forms. A separate, unrelated proteolytic product of the same gene has its own distinct cancer-biology research literature, presented here only as risk/context, never as supportive of dermcidin's antimicrobial role.
Evidence Claims
Individual scientific statements drawn from the sources cited below, each shown with the specific evidence boundary that statement does not establish.
Supported
Dermcidin is a 110-amino-acid preproprotein constitutively expressed and secreted by human eccrine sweat glands, proteolytically processed in sweat into at least 14 distinct peptide forms, of which DCD-1 and DCD-1L are the two best-characterized antimicrobial fragments.
Does not establish
Evidence boundary: Must not be simplified to imply only two fragments exist -- at least 14 are documented.
Sources: Dermcidin: a novel human antibiotic peptide secreted by sweat glands; Generation of multiple stable dermcidin-derived antimicrobial peptides in sweat of different body sites
Supported
Cathepsin D, present in human eccrine sweat, is involved in the postsecretory proteolytic processing that generates DCD-1L from its precursor.
Does not establish
Evidence boundary: Processing-mechanism finding, not an efficacy finding.
Supported
DCD-1, the originally characterized processed dermcidin peptide, shows antimicrobial activity that remains functional across the salt concentrations and pH range found in human sweat.
Does not establish
Evidence boundary: This claim is FORM-SPECIFIC to DCD-1 as tested; not automatically evidence for DCD-1L's specific mechanism.
Sources: Dermcidin: a novel human antibiotic peptide secreted by sweat glands
Supported
DCD-1L forms zinc-dependent oligomeric ion channels in bacterial-mimetic lipid bilayers, with its positively-charged N-terminus embedding in the membrane and its anionic C-terminus surface-exposed, stabilized by a zinc bridge.
Does not establish
Evidence boundary: Mechanism is DCD-1L-specific; must not be generalized to DCD-1 or the other 12 known fragments.
Supported
Patients with atopic dermatitis show a deficiency of dermcidin-derived antimicrobial peptides in their sweat, correlating with impaired innate cutaneous defense in vivo.
Does not establish
Evidence boundary: Correlative, single study; does not establish causation or that restoring dermcidin levels treats atopic dermatitis.
Safety & Evidence Limitations
Considerations reported in the sources cited on this page — not a complete list of every possible risk, and not medical advice.
Safety Consideration
Content must never imply DCD-1/DCD-1L are the only dermcidin-derived peptides.Safety Consideration
Must not be generalized to DCD-1 or other dermcidin fragments without independent support.Safety Consideration
A distinct proteolytic product of the same dermcidin gene (a 'neural survival factor') has been found elevated in some breast cancer tissue in one gene-expression study -- an entirely different research context from dermcidin's antimicrobial role. This must never be framed as supportive of, or related to, dermcidin's antimicrobial biology; it is presented purely as background/risk context.
Research Areas Being Studied
Research areas discussed on this page reflect the Antimicrobial / Innate-Defense Peptides category and the sources cited below.
Findings Reported in Studies
Educational summary only — reported in cited studies, not a claim of proven benefit.
- Structure-Activity Analysis of the Dermcidin-derived Peptide DCD-1L, an Anionic Antimicrobial Peptide Present in Human Sweat (2012):
- Cathepsin D is present in human eccrine sweat and involved in the postsecretory processing of the antimicrobial peptide DCD-1L (2006):
- Generation of multiple stable dermcidin-derived antimicrobial peptides in sweat of different body sites (2006):
- Deficiency of dermcidin-derived antimicrobial peptides in sweat of patients with atopic dermatitis correlates with an impaired innate defense of human skin in vivo (2005):
- A neural survival factor is a candidate oncogene in breast cancer (2003):
- Dermcidin: a novel human antibiotic peptide secreted by sweat glands (2001):
Study Tables by Evidence Type
Human Studies & Clinical Data
| Title | Year | Population / Model | Dose / Duration / Finding | Safety Notes | Source |
|---|---|---|---|---|---|
| Structure-Activity Analysis of the Dermcidin-derived Peptide DCD-1L, an Anionic Antimicrobial Peptide Present in Human Sweat | 2012 | DCD-1L peptide, biophysical/lipid-bilayer membrane model | DCD-1L forms zinc-dependent oligomeric ion channels in bacterial-mimetic lipid bilayers via a specific N-terminus-embedding, zinc-bridge-stabilized conformation. | ||
| Cathepsin D is present in human eccrine sweat and involved in the postsecretory processing of the antimicrobial peptide DCD-1L | 2006 | human eccrine sweat, enzymatic/processing study | Cathepsin D is present in human eccrine sweat and is involved in the postsecretory proteolytic processing that generates DCD-1L. | ||
| Generation of multiple stable dermcidin-derived antimicrobial peptides in sweat of different body sites | 2006 | human eccrine sweat, multiple body sites, SELDI-TOF-MS/HPLC analysis | Identified 14 distinct proteolytically processed dermcidin peptide forms in eccrine sweat, varying by body site. | ||
| Deficiency of dermcidin-derived antimicrobial peptides in sweat of patients with atopic dermatitis correlates with an impaired innate defense of human skin in vivo | 2005 | human sweat samples, atopic dermatitis patients vs. controls | Patients with atopic dermatitis show reduced dermcidin-derived antimicrobial peptides in sweat, correlating with impaired innate cutaneous defense. | ||
| A neural survival factor is a candidate oncogene in breast cancer | 2003 | human breast carcinoma tissue, gene-expression (SAGE) study | A dermcidin (DCD) transcript, encoding a distinct proteolytic product from the antimicrobial DCD-1/DCD-1L peptides, was found overexpressed in invasive breast carcinoma and lymph node metastases. | ||
| Dermcidin: a novel human antibiotic peptide secreted by sweat glands | 2001 | human eccrine sweat glands / sweat | Discovery of dermcidin, constitutively expressed and secreted by human eccrine sweat glands, proteolytically processed into the 47-aa DCD-1 peptide with broad, salt- and pH-stable antimicrobial activity. |
Animal / Cell / Preclinical Data
No Animal / Cell / Preclinical Data Listed Yet
This section will be updated as sources are added.
Regulatory Documents & Official Trial Registries
No Regulatory Documents & Official Trial Registries Listed Yet
This section will be updated as sources are added.
Anecdotal Reported Patterns — Not Medical Advice
Anecdotal Reported Patterns — Not Medical Advice
Reported dosing patterns are included for educational context only. They are self-reported, unverified, not medical advice, and not instructions for human use. Community-submitted patterns are not yet available in this Phase 1 prototype; this section is a placeholder reserved for moderated, aggregated community data.
Lab Markers to Discuss With a Clinician
Educational topics only — not self-monitoring instructions.
FAQ
Disclaimer
Educational information only. This page summarizes published research on endogenous human dermcidin/DCD-1L and does not constitute medical advice, a treatment recommendation, or dosing guidance for any related substance.
Educational use only. This content is provided for informational and research-summary purposes only. It is not medical advice, not a treatment recommendation, not a dosing guide, and not a substitute for care from a licensed medical professional. Nothing here is intended to diagnose, treat, cure, prevent, or mitigate disease. Reported dosing patterns, when shown elsewhere on the site, must be labeled either as Study / Trial Dosing or Anecdotal Reported Patterns — Not Medical Advice. Community reports are self-reported, unverified, and not scientific proof.
Community-reported experiences, once enabled, must be displayed only as moderated, anonymized, or aggregated data. They are anecdotal, self-reported, unverified, and should never be presented as proof of safety, efficacy, or expected results.
Content status: Published. Last updated 2026-08-29.
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