The expression of five different claudins in invasive breast carcinomas: Comparison of pT1pN1 and pT1pN0 tumors

As a preliminary result, our observations suggest that the analyzed CLDNs do not promote tumor metastasis. On the basis of our findings, it seems that CLDN 1, CLDN 4, and CLDN 7 may rather have an important role in tumorigenesis or in cell-to-cell adhesion.