Figure 2.
Effect of doxycycline treatment on bone histomorphometric parameters in a mouse bone metastasis model of human breast cancer (MDA-MB-231). Longitudinal sections of the femora were analysed to determine (A) eroded bone surface as a fraction of the trabecular bone surface (%), and (B) osteoid surface as a fraction of the trabecular bone surface (%), (C) number of osteoclasts per mm trabecular bone surface, and (D) number of osteoblasts per mm of trabecular bone surface. Data represent means±s.e. of the combined values of all animals in each of the groups in at least two separate experiments (n⩾3). * Significantly different from corresponding control group (no tumour cells injected) (P<0.05). ** Significantly different from placebo control animals (no tumour cells injected) (P<0.05). oSignificantly different from placebo tumour-bearing animals (P<0.05). aSignificantly different from corresponding doxycycline-alone group (P<0.05). bSignificantly different from corresponding zoledronic acid-alone group (P<0.05).