Anticancer research
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Anticancer research · May 1999
Comparative StudyImmunohistochemical localization of metallothionein in human breast cancer in comparison with cathepsin D, stromelysin-1, CD44, extracellular matrix components, P53, Rb, C-erbB-2, EGFR, steroid receptor content and proliferation.
Metallothionein (MT) is a low molecular weight, cysteine-rich, zinc-binding protein that may have a function in cellular repair processes, growth and differentiation. Using a monoclonal antibody (E9) to metallothionein, we investigated the immunohistochemical expression of MT in routinely fixed and paraffin-embedded tissue from 98 cases of female breast carcinomas. The MT expression was studied in comparison with the expression of the basement membrane (BM) antigens (type IV collagen, laminin), fibronectin, cathepsin D, adhesion molecule CD44, p53 protein, the pRb, c-erbB-2 oncoprotein, EGFR, stromelysin-1, proliferation indices (Ki-67, PCNA), steroid receptor content as well as with other conventional clinicopathological parameters of breast cancer. ⋯ High values of MT were correlated with low steroid receptor status (p = 0.08 for ER receptor and p = 0.019 for PgR receptor content). MT positive cases were correlated with stromelysin-1 expression (p = 0.059) and cathepsin D (p = 0.058). These findings suggest that MT expression is characteristic of the early phase of breast carcinogenesis, possibly regulated by hormones, and could be a new potential prognostic marker in breast cancer.
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Anticancer research · May 1999
Multicenter Study Clinical Trial Controlled Clinical TrialCombined irinotecan, docetaxel and conventionally fractionated radiotherapy in locally advanced head and neck cancer. A phase I dose escalation study.
Both docetaxel and irinotecan have shown strong radiosensitizing properties in vitro. Encouraging results have been reported by phase I/II studies on combined docetaxel or irinotecan with radiotherapy. In the present study we investigated the feasibility of double radiosensitization with weekly docetaxel and irinotecan in head and neck cancer. ⋯ Of interest, the lowest CR rate was observed in the 3rd dose level (2/4; 50%), which may be a consequence of overall treatment time prolongation. It is concluded that docetaxel and irinotecan combination with radiotherapy is feasible and, a high CR rate can be expected. Combination of the regimen with cytoprotective agents warrant further investigation.