Cited by 1,960Antimicrobial Peptides and ActivitiesDermatology and Skin DiseasesContact Dermatitis and Allergies

Endogenous Antimicrobial Peptides and Skin Infections in Atopic Dermatitis

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Ong, Peck Y., Ohtake, Takaaki, Brandt, Corinne, Strickland, Ian, Boguniewicz, Mark, Ganz, Tomas, Gallo, Richard L., Leung, Donald Y.M.·2002·New England Journal of Medicine

Abstract

BACKGROUND: The innate immune system of human skin contains antimicrobial peptides known as cathelicidins (LL-37) and beta-defensins. In normal skin these peptides are negligible, but they accumulate in skin affected by inflammatory diseases such as psoriasis. We compared the levels of expression of LL-37 and human beta-defensin 2 (HBD-2) in inflamed skin from patients with atopic dermatitis and from those with psoriasis. METHODS: The expression of LL-37 and HBD-2 protein in skin-biopsy specimens from patients with psoriasis, patients with atopic dermatitis, and normal subjects was determined by immunohistochemical analysis. The amount of antimicrobial peptides in extracts of skin samples was also analyzed by immunodot blot analysis (for LL-37) and Western blot analysis (for HBD-2). Quantitative, real-time reverse-transcriptase-polymerase-chain-reaction (RT-PCR) assays were used to confirm the relative expression of HBD-2 and LL-37 messenger RNA (mRNA) in the skin-biopsy specimens. These peptides were also tested for antimicrobial activity against Staphylococcus aureus with the use of a colony-forming assay. RESULTS: Immunohistochemical analysis confirmed the presence of abundant LL-37 and HBD-2 in the superficial epidermis of all patients with psoriasis. In comparison, immunostaining for these peptides was significantly decreased in acute and chronic lesions from patients with atopic dermatitis (P=0.006 and P=0.03, respectively). These results were confirmed by immunodot blot and Western blot analyses. Real-time RT-PCR showed significantly lower expression of HBD-2 mRNA and LL-37 mRNA in atopic lesions than in psoriatic lesions (P=0.009 and P=0.02, respectively). The combination of LL-37 and HBD-2 showed synergistic antimicrobial activity by effectively killing S. aureus. CONCLUSIONS: A deficiency in the expression of antimicrobial peptides may account for the susceptibility of patients with atopic dermatitis to skin infection with S. aureus.

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  • AMPs can amplify the proinflammatory cytokine response and can thus, in some circumstances, assume pathogenic roles as in psoriasis, rosacea, and other skin diseases.

    “AMPs can amplify the proinflammatory cytokine response and can thus, in some circumstances, assume pathogenic roles as in psoriasis, rosacea, and other skin diseases.36–38”

    From The Innate Immune System in Acute and Chronic Wounds (2016) · cites this paper as [37]

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  1. Leung DYM, Tharp M, Boguniewicz M. Atopic dermatitis (atopic ec- zema). In: Freedberg IM, Eisen AZ, Wolff K, et al., eds. Fitzpatrick's der- matology in general medicine. 5th ed. Vol. 1. New York: McGraw-Hill, 1998:1464-80.

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Authors
Ong, P. Y., Ohtake, T., Brandt, C., Strickland, I., Boguniewicz, M., Ganz, T., Gallo, R. L., & Leung, D. Y. M.
Affiliations
  • National Jewish Health (US)
  • VA San Diego Healthcare System (US)
  • University of California, Los Angeles (US)
Venue
New England Journal of Medicine
Published
2002-10-10
Volume
347
Issue
15
Pages
1151-1160
ISSN
  • 0028-4793 (ISSN-L)
  • 1533-4406
OpenAlex
W2094036101
Cited by
1,960
References
29
Citations by year
2026: 30 · 2025: 49 · 2024: 48 · 2023: 64 · 2022: 67 · 2021: 64 · 2020: 61 · 2019: 75 · 2018: 83 · 2017: 89 · 2016: 93 · 2015: 78 · 2014: 91 · 2013: 81 · 2012: 111
FWCI
58.99
Type
journal article
Language
en
Open access
Locations
  • New England Journal of Medicine (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Cancer Center, University of Colorado
  • National Heart, Lung, and Blood Institute (HL 36577, R01HL046809, P01HL036577, HL46809, HL 37260)
  • National Institute of Allergy and Infectious Diseases (T32AI007365, AI48176, R21AI048176)
  • National Institute of Arthritis and Musculoskeletal and Skin Diseases (AR 41256, R01AR041256)
  • National Center for Research Resources (M01RR000051)
Topics
  • Life Sciences › Immunology and Microbiology › Microbiology › Antimicrobial Peptides and Activities
  • Health Sciences › Medicine › Dermatology › Dermatology and Skin Diseases
  • Health Sciences › Medicine › Dermatology › Contact Dermatitis and Allergies
Keywords
antimicrobial peptides, atopic dermatitis, psoriasis, LL-37, cathelicidin, human beta-defensin 2, Staphylococcus aureus, skin infections, innate immunity, epidermis, antimicrobial activity, gene expression
MeSH terms
Adult, Cell Line, Dermatitis, Atopic, Gene Expression Regulation, Humans, Psoriasis, RNA, Messenger, Skin, Staphylococcus aureus, Tumor Necrosis Factor-alpha, Immunoblotting, Keratinocytes, Gene Expression, beta-Defensins, Antimicrobial Cationic Peptides, Cathelicidins

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