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Object

To clarify involvement of mast cells in pathological process of scleroderma.

Methods

Histology:
Skin biopsy was performed for diagnostic purposes;

  • ・Scleroderma (systemic sclerosis; SSc):54 cases
  • ・Non-SSc (Collagen disease): 29 cases
  • ・Control:10 cases- Autopsy, Healthy skin histology in median section

Increased mast cells in the dermis of a SSc patient

Increased mast cells in the dermis of SSc patients

The association of the number of dermis mast cells with the severity of skin sclerosis

The association of the number of dermis mast cells with the severity of PAH

Increased dermis mast cells of SSc patients with PAH

Increase pulmonary interstitium mast cells co-localizing with pulmonary artery in SSc-PAH

SSc-PAH (one case) lung tissue findings with intimal thickening with increase of elastic fiber / collagen fiber

TGF-b and PDGF production from dermis mast cell in SSc

TGF-b and PDGF production by mast cells in pulmonary interstitium of SSc-PAH