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The MUC1 gene encodes a mucin glycoprotein and is overexpressed in breast cancer. Knowledge of the mechanisms leading to MUC1 overexpression may help in the development of molecular approaches for breast cancer therapy. In order to study the regulation of the MUC1 gene transcription, we analyzed functional activities of various deletion mutants of the MUC1 promoter. We established that transcriptional...
The tumor promoter TPA is found to inhibit gap junction permeability in monolayer cultures of hamster fibroblasts. This effect is associated with an increase in intracellular pH. Here we show that neither an increase in pH 1 alone nor TPA treatment under conditions preventing pH 1 -shift affect gap junction permeability. It is not the level of pH 1 reached, but rather the pH...
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