Topical application of 5-fluorouracil on attic cholesteatoma results in downregulation of keratinocyte growth factor and reduction of proliferative activity.
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The original publication is available at www.springerlink.comTo investigate the cell-biological effect of topically applied 5-fluorouracil (5-FU) on middle ear cholesteatoma, 12 attic cholesteatomas were treated with topical application of 5-FU cream, two to five times with an interval of 2 weeks (5-FU group). The control group comprised 65 cholesteatoma that were not treated with 5-FU. All lesions were later excised surgically and processed for immunohistochemical analyses of Ki-67, keratinocyte growth factor (KGF) and its receptor (KGFR). 5-FU significantly reduced the expression of KGF, did not change KGFR expression, and significantly reduced the Ki-67 labeling index, relative to the control group. The effect of 5-FU on cholesteatoma seems to be mediated, at least in part, through downregulation of KGF in stromal cells and reduction of the proliferative activity of epithelial cells.
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