TRPV1 and breast cancer: We therefore determined relative TRPV1 expression in the lumbar DRGs harvested from the 4T1 BC mice, compared with that in 4T1 BC cells, and primary mouse bone marrow stromal cells, and osteoclasts formed from mouse bone marrow macrophages, and mouse primary calvarial osteoblasts, and mouse MLO-Y4 osteocyte-like cells.