Abstract
Phosphatidylinositol 3-kinase (PI3K) and protein kinase B (AKT) signaling pathway play a central role in multiple cellular functions such as cell proliferation and survival. The forkhead box O (FOXO) transcription factors are negatively regulated by the PI3K/AKT signaling pathway and considered to have inhibitory effect on cell proliferation. Psoriasis is a multifactorial disease with a strong genetic background and characterized by hyperproliferative keratinocyte. PI3K signaling regulates proliferation of keratinocyte by activating AKT and other targets, and by inducing FOXO downregulation. The amplification of PI3K and AKT and the loss of the FOXO are gradually being recognized in psoriatic lesions. The upstream and downstream of PI3K/AKT signaling molecules such as tumor suppressor phosphatase and tensin homolog (PTEN) and mammalian target of Rapamycin (mTOR), respectively, are also frequently altered in psoriasis. In this review, we highlight the recent studies on the roles and mechanisms of PI3K and AKT in regulating hyperproliferation of keratinocyte, and the roles of the downstream targets FOXO in psoriasis. Finally, we summarized that PI3K/AKT/FOXO signaling and its upstream and downstream molecule which could be underlying therapeutic target for psoriasis. This article is part of a special issue entitled: PI3K–AKT–FOXO axis in psoriasis.
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Abbreviations
- PI3K:
-
Phosphatidylinositol-4,5-bisphosphate 3-kinase
- AKT/PKB:
-
Protein kinase B
- FOXO:
-
Forkhead box O
- PTEN:
-
Phosphatase and tensin homolog
- mTOR:
-
Mammalian target of Rapamycin complex
- PDK1:
-
Phosphoinositide-dependent kinase-1
- GFR:
-
Growth factor receptor
- PH:
-
Pleckstrin homology
- PIP3:
-
Phosphatidylinositol 3–5 triphosphate
- AFX:
-
Acute-lymphocytic-leukemia-1 fused gene from chromosome X
- FKHR:
-
Forkhead in rhabdomyosarcoma
- FKHR-L1:
-
FKHR-like 1
- IL-22:
-
Interleukin 22
- FasL:
-
Fas ligand
- TRAIL:
-
TNF-related apoptosis-inducing ligand
- TRADD:
-
TNF receptor type 1 associated death domain
- BCL2:
-
B-cell lymphoma 2
- BIM:
-
Bcl-2-like protein 11
- BAD:
-
Bcl-2-associated death promoter
- FLS:
-
Synovial cells
- NHEK:
-
Normal human epidermal keratinocyte
- IMQ:
-
Imiquimod
- ROS:
-
Reactive oxygen species
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This work was supported by a grant from the National Natural Science Foundation of China (Grant numbers: 81573048).
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Zhang, M., Zhang, X. The role of PI3K/AKT/FOXO signaling in psoriasis. Arch Dermatol Res 311, 83–91 (2019). https://doi.org/10.1007/s00403-018-1879-8
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DOI: https://doi.org/10.1007/s00403-018-1879-8