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Phosphodiesterase-4 Inhibition Reduces Cutaneous Inflammation and IL-1β Expression in a Psoriasiform Mouse Model but Does Not Inhibit Inflammasome Activation
- Source :
- International Journal of Molecular Sciences, International Journal of Molecular Sciences, Vol 22, Iss 12878, p 12878 (2021)
- Publication Year :
- 2021
-
Abstract
- Apremilast (Otezla®) is an oral small molecule phosphodiesterase 4 (PDE4) inhibitor approved for the treatment of psoriasis, psoriatic arthritis, and oral ulcers associated with Behçet’s disease. While PDE4 inhibition overall is mechanistically understood, the effect of apremilast on the innate immune response, particularly inflammasome activation, remains unknown. Here, we assessed the effect of apremilast in a psoriasis mouse model and primary human cells. Psoriatic lesion development in vivo was studied in K5.Stat3C transgenic mice treated with apremilast for 2 weeks, resulting in a moderate (2 mg/kg/day) to significant (6 mg/kg/day) resolution of inflamed plaques after 2-week treatment. Concomitantly, epidermal thickness dramatically decreased, the cutaneous immune cell infiltrate was reduced, and proinflammatory cytokines were significantly downregulated. Additionally, apremilast significantly inhibited lipopolysaccharide- or anti-CD3-induced expression of proinflammatory cytokines in peripheral mononuclear cells (PBMCs). Notably, inflammasome activation and secretion of IL-1β were not inhibited by apremilast in PBMCs and in human primary keratinocytes. Collectively, apremilast effectively alleviated the psoriatic phenotype of K5.Stat3 transgenic mice, further substantiating PDE4 inhibitor-efficiency in targeting key clinical, histopathological and inflammatory features of psoriasis. Despite lacking direct effect on inflammasome activation, reduced priming of inflammasome components upon apremilast treatment reflected the indirect benefit of PDE4 inhibition in reducing inflammation.
- Subjects :
- QH301-705.5
Inflammasomes
1503 Catalysis
PDE4 inhibition
Interleukin-1beta
Drug Evaluation, Preclinical
1607 Spectroscopy
Mice, Transgenic
610 Medicine & health
Article
Catalysis
Inorganic Chemistry
inflammasome
1312 Molecular Biology
1706 Computer Science Applications
Animals
Humans
Psoriasis
Biology (General)
Physical and Theoretical Chemistry
QD1-999
Molecular Biology
Spectroscopy
1604 Inorganic Chemistry
Organic Chemistry
10177 Dermatology Clinic
General Medicine
cytokines
Immunity, Innate
Thalidomide
Computer Science Applications
Chemistry
Phosphodiesterase 4 Inhibitors
1606 Physical and Theoretical Chemistry
1605 Organic Chemistry
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Journal :
- International Journal of Molecular Sciences, International Journal of Molecular Sciences, Vol 22, Iss 12878, p 12878 (2021)
- Accession number :
- edsair.pmid.dedup....29d2d05e9d0226e583c857dc1092523f