IFT88 and breast cancer: Using siRNA for intraflagellar transport protein 88 (IFT88) to knockdown osteocyte primary cilia, we found that this disrupted osteocyte mechanosensitivity did indeed abrogate the mechano‐regulated control of breast cancer cell proliferation, as we observed previously.[19] However, no effect on prostate cancer cells was observed (Figure S6B, Supporting Information).