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Triple-negative breast cancer is one of the deadliest diseases for women, according to the World Health Organization. The most common drugs used and in development for this disease are based upon the proteomics approach, but this so far has not accounted for the whole repertoire of human genome expression. However, a novel approach is currently under development to model the molecular interaction between miR-145 and the 3' untranslated region (UTR) of ARF6 mRNA. This approach should eventually be useful for transcriptomics-based drug development. The utilized methods are molecular-docking and dynamics based, using open-source software. It was found that there was a fine-grained molecular interaction between miR-145 and the 3' UTR of ARF6 mRNA. It is concluded that the information from the interaction could be utilized as the basis for drug development.