Complement components in blood serum and, suction blister fluid in erythropoietic protoporphyria

SUMMARY Complement factors C3c, C4, factor B, C3d and the immunoglobulin IgA were determined in suction blister fluid of patients with erythropoictic protoporphyria and in normal controls. The levels increased when the skin of the patients had been previously irradiated with ‘white light’, but not with Kromayer radiation, and were interpreted as being the result of increased vasopermeability.