ZNF750 Loss of Function Drives Spontaneous Psoriasiform Skin Inflammation

Area of Science:

• Dermatology and immunology
• Molecular biology and genetics

Background:

• Epidermal keratinocytes are vital for skin barrier function and inflammation.
• ZNF750 is an epithelial-specific transcription factor crucial for keratinocyte differentiation.
• Human ZNF750 variants are linked to psoriasis-like skin disease.

Purpose of the Study:

• To investigate the role of ZNF750 in maintaining epidermal homeostasis and preventing skin inflammation.
• To elucidate the molecular mechanisms underlying ZNF750's function in keratinocytes.

Main Methods:

• Utilized a genetic mouse model with ZNF750 deficiency.
• Performed molecular dissection to analyze cellular and molecular changes.
• Examined epidermal homeostasis, keratinocyte proliferation and differentiation, and immune cell infiltration.

Main Results:

• Loss of ZNF750 activity led to rapid development of psoriasiform skin lesions.
• Observed an imbalance in epidermal cell proliferation and differentiation.
• Detected induction of proinflammatory factors and significant immune cell infiltration in ZNF750-deficient skin.

Conclusions:

• ZNF750 activity is essential for preventing skin inflammation.
• ZNF750 loss-of-function is sufficient to drive severe psoriasiform skin inflammation.
• These findings underscore the critical role of keratinocytes and ZNF750 in inflammatory skin disease pathogenesis, mirroring human conditions.