Bone and Mineral 

TL;DR: Ovariectomy induced bone loss in the rat and postmenopausal bone loss share many similar characteristics, including: increased rate of bone turnover with resorption exceeding formation; and initial rapid phase of bone loss followed by a much slower phase.

TL;DR: The results demonstrate an inverse relationship between the differentiation of adipocytic and osteogenic cells in this culture system and are consistent with the possibility that the regulation of adipogenesis and osteogenesis can occur at the level of a common precursor in vivo.

TL;DR: It is concluded that urinary HP and LP excretion represents the first sensitive and specific marker of bone resorption and should be valuable in the clinical investigation of metabolic bone diseases, especially osteoporosis.

TL;DR: The idea that rats cannot model human osteopenias errs because the same mechanisms control gains in bone mass (longitudinal bone growth and modeling drifts) and losses (BMU-based remodeling) in young and aged rats and humans.