Junctional intercellular communication pattern of cultured human breast cancer cells.

Junctional intercellular communication between several established human breast cancer cell lines and a variety of mammalian cells has been examined. All the cancer cell lines were found to be either noncommunicators or nonselective communicators. This contrasts with normal human mammary epithelium which shows selectivity in junctional communication. Loss of selectivity in junctional communication appears to be a general feature of cultured human breast cancer cells.