Fig. 1From: Inducible Nitric Oxide Synthase and Proinflammatory Cytokine Expression by Human Keratinocytes during Acute Urticaria iNOS expression in healthy and pathological skin (A) PCR showing HPRT (upper lanes) and iNOS bands (lower bands) in 11 patients with acute urticaria (for each patient: healthy skin followed by lesional skin; Patient 4 is negative for iNOs mRNA). (B) iNOS immunoreactivity in pathological skin, showing staining all along the basal layer of keratinocytes. (C) Negative (anti-CD3 moAb) and (D) positive control (anticytokeratin Ab) from the same biopsy. Magnification: ×240 (B), ×60 (C, D).Back to article page