Cited by 73Skin Protection and AgingNonmelanoma Skin Cancer StudiesPsoriasis: Treatment and Pathogenesis

RETRACTED: IL-12 Deficiency Exacerbates Inflammatory Responses in UV-Irradiated Skin and Skin Tumors

Open access
Meeran, Syed M., Punathil, Thejass, Katiyar, Santosh K.·2008·Journal of Investigative Dermatology

Abstract

IL-12 deficiency has been shown to promote photocarcinogenesis in mice. As UVB-induced inflammation is an important tumor-promoting event in the development of skin tumors, we determined the effects of IL-12-deficiency on UVB-induced inflammatory responses in mice. For this purpose, IL-12-knockout (IL-12 KO) and their wild-type counterparts were subjected to a photocarcinogenesis protocol; skin and tumor samples were collected at the termination of the experiment, and analyzed for biomarkers of inflammation and their mediators. We found that the levels of infiltrating leukocytes, myeloperoxidase, proliferating cell-nuclear antigen (PCNA), COX-2, PGE2, and the proinflammatory cytokines IL-1beta, TNF-alpha, and IL-6 were higher in the UVB-exposed skin of IL-12 KO than in that of wild-type mice. In a short-term experiment, pretreatment of IL-12 KO mice with rIL-12 (50 ng per mouse) before each exposure to UVB increased the repair rate of UVB-induced cyclobutane pyrimidine dimers, while inhibiting UVB-induced increases in myeloperoxidase, COX-2, PGE2, PCNA, TNF-alpha, and IL-1beta in the skin as compared with non-rIL-12-treated IL-12 KO mice. Similarly, tumors of IL-12 KO mice expressed higher levels of inflammatory responses than those of wild-type mice. Together, our data suggest that IL-12 KO mice are more susceptible to both UVB-induced inflammation and photocarcinogenesis because of the deficiency in the repair of UVB-induced DNA damage.

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Crossref · 10.1038/jid.2008.140This paper is marked retracted.

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  • The MPO system has been involved in various skin pathologies, either serving as a causative factor or biomarker in inflammation, contact hypersensitivity and irritation, psoriasis, UV-damage, photoaging, and carcinogenesis.

    “beyond a role in cutaneous innate immunity, the MPO system has also been involved in various skin pathologies, either serving as a causative factor or biomarker in inflammation, contact hypersensitivity and irritation, psoriasis, UV-damage, photoaging, and carcinogenesis (51–59).”

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Authors
Meeran, S. M., Punathil, T., & Katiyar, S. K.
Affiliations
University of Alabama at Birmingham (US)
Venue
Journal of Investigative Dermatology
Publisher
Elsevier BV
Published
2008-11
Volume
128
Issue
11
Pages
2716-2727
ISSN
0022-202X (ISSN-L)
OpenAlex
W2032449786
Cited by
73
References
42
Citations by year
2026: 1 · 2025: 1 · 2024: 2 · 2023: 3 · 2022: 1 · 2021: 5 · 2020: 1 · 2019: 5 · 2018: 5 · 2017: 4 · 2016: 3 · 2015: 6 · 2014: 3 · 2013: 10 · 2012: 1
FWCI
7.84
Type
journal article
Language
en
Status
Retracted
Open access
Locations
  • Journal of Investigative Dermatology (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • Nurses Organization of Veterans Affairs
  • National Center for Complementary and Alternative Medicine (1 RO1 AT002536)
Topics
  • Health Sciences › Medicine › Dermatology › Skin Protection and Aging
  • Health Sciences › Medicine › Epidemiology › Nonmelanoma Skin Cancer Studies
  • Life Sciences › Immunology and Microbiology › Immunology › Psoriasis: Treatment and Pathogenesis
Keywords
UVB-induced skin inflammation, photocarcinogenesis, skin tumors, DNA repair, cyclobutane pyrimidine dimers, myeloperoxidase, cyclooxygenase-2, prostaglandin E2, inflammatory cytokines, TNF-α, IL-1β, interleukin-6, retracted article
MeSH terms
Animals, Cell Movement, DNA Damage, Female, Inflammation, Leukocytes, Neoplasms, Radiation-Induced, Skin, Skin Neoplasms, Dinoprostone, Mice, Knockout, Interleukin-12, Proliferating Cell Nuclear Antigen, Cyclin D1, Genetic Predisposition to Disease, Mice, Cyclooxygenase 2

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