Experimental human cell and tissue models of pemphigus

Area of Science:

• Dermatology
• Immunology
• Cell Biology

Background:

• Pemphigus is a chronic autoimmune blistering disease affecting skin and mucous membranes.
• Loss of cell-cell contact (acantholysis) is a hallmark of pemphigus.
• Desmosomes are identified as targets, with IgG binding initiating acantholysis, but mechanisms remain unclear.

Purpose of the Study:

• To evaluate the suitability of human cell and tissue models for studying pemphigus pathogenesis.
• To assess how well these models represent the in vivo situation of pemphigus.

Main Methods:

• Review of experimental model systems for pemphigus research.
• Analysis of organ cultures of human skin.
• Evaluation of keratinocyte cultures.
• Assessment of human skin grafted onto mice.

Main Results:

• Organ cultures mimic epidermal architecture but are limited for biochemical studies.
• Keratinocyte monolayers are useful for biochemical analysis but lack accurate in vivo desmosomal composition.
• Reconstituted skin models offer an improved approach.
• Human skin grafted onto mice allows in vivo acantholysis study within a human tissue context.

Conclusions:

• Various human cell and tissue models offer distinct advantages for pemphigus research.
• Model selection depends on the specific research question, balancing in vivo relevance with experimental tractability.
• Grafted human skin on mice presents a promising model for studying pemphigus pathogenesis.