Psoriasis: Keratinocytes or Immune Cells - Which Is the Trigger?

Area of Science:

• Dermatology
• Immunology
• Pathogenesis of skin diseases

Background:

• Psoriasis is a prevalent, chronic inflammatory skin condition.
• It significantly affects patients' quality of life.
• The precise sequence of events in psoriatic plaque development is not fully elucidated.

Purpose of the Study:

• To explore the chronological mechanisms in psoriasis pathogenesis.
• To highlight the collaborative roles of various skin-resident cells.

Main Methods:

• Review of current understanding of psoriasis pathogenesis.
• Analysis of evidence from transgenic murine models.
• Investigation of immune cell and cytokine involvement.

Main Results:

• Psoriasis pathogenesis involves a dynamic interplay between immune cells, keratinocytes, and other skin-resident cells.
• T lymphocytes are not the sole contributors; other immune cells and cytokines play crucial roles.
• These interactions are vital in both the initiation and maintenance of psoriatic alterations.

Conclusions:

• Psoriasis is a complex immune-mediated disease.
• The coordinated action of multiple cell types, including keratinocytes and immune cells, drives psoriasis.
• Cytokines and immune cells regulate both early and late stages of the disease.