Review Article
Connexin’s Connection in Breast Cancer Growth and Progression
Table 3
Drugs, their mode of action, and reported effects on GJIC and breast tumor.
| Drug | Mode of action | Anti-breast tumor effect |
| Organochlorine compound TCDD | Nonspecific, increases phosphorylated Cx43 and GJIC | Decreases GJIC | PQ1 quinolone derivative | Nonspecific, increases Cx43 expression and increases GJIC | Decreases colony formation ability and xenograft tumor growth of T47D cells | PQ1 + cisplatin | Combination treatment, bystander effect | Reduces T47D cell proliferation synergizing with cytotoxic effects of cisplatin | Peptide ACT1 | Increases gap junction aggregation by redirecting uncoupled Cx43 hemichannels into the membrane | Reduces MCF-7 and MDA-MB-231 cell proliferation in vitro | ACT1 + tamoxifen | Combination treatment, bystander effect | Augments tamoxifen cytotoxic effects on MCF-7 cells | All-trans-retinoic acid (ATRA) + VEGFP-TK/CD gene suicide system | ATRA increases GJIC and mediates bystander effects to induce cell killing by gene suicide system | Increases apoptotic MCF-7 cell death | Anti-Cx46 | Knocks down Cx46 | Reduces MCF-7 viability under hypoxia and inhibits xenograft tumor growth |
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