NFKB1 and breast cancer: The NF-κB (nuclear factor kappa-light-chain-enhancer of activated B cells) pathway is responsible for the development and maintenance of the inflammatory process within excessive adipose tissue, which through pro-inflammatory cytokines has an inhibitory effect on the process of apoptosis, and at a later stage promotes the proliferation of breast cancer cells, cancer invasion, angiogenesis, and metastasis [63,64].