TISSUE ALPHA-GLOBULINS IN KELOID FORMATION

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Abstract
The deposition of alpha-1-antitrypsin and alpha-2-macroglobulin, both known to be inhibitors of human skin collagenase, is significantly increased in keloids and in hypertrophic scars (as compared to normal skin). However, following intralesional triamcinolone treatment, a marked resorption of these abnormal scars occurs along with a significant reduction of the alpha-1-antitrypsin deposits. These findings suggest that alpha-globulins are involved in abnormal scar formation, and that triamcinolone may remove collagenase and/or protease inhibitors--thereby allowing activation of the collagenase with subsequent breakdown and resorption of the excessive collagen.

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