2 documents found, page 1 of 1
The NAD salvage pathway in mesenchymal cells is indispensable for skeletal deve...
Warren, Aaron; Porter, Ryan M; Reyes-Castro, Olivia; Ali, Md Mohsin; Carvalho, Adriana Marques; Kim, Ha-Neui; Gatrell, Landon B; Schipani, ErnestinaNAD is an essential co-factor for cellular energy metabolism and multiple other processes. Systemic NAD+ deficiency has been implicated in skeletal deformities during development in both humans and mice. NAD levels are maintained by multiple synthetic pathways but which ones are important in bone forming cells is unknown. Here, we generate mice with deletion of Nicotinamide Phosphoribosyltransferase (Nampt), a ...
Estrogens decrease osteoclast number by attenuating mitochondria oxidative phos...
Kim, Ha-Neui; Ponte, Filipa; Nookaew, Intawat; Ucer Ozgurel, Serra; Carvalho, Adriana Marques; Iyer, Srividhya; Warren, Aaron; Aykin-Burns, NukhetLoss of estrogens at menopause is a major cause of osteoporosis and increased fracture risk. Estrogens protect against bone loss by decreasing osteoclast number through direct actions on cells of the myeloid lineage. Here, we investigated the molecular mechanism of this effect. We report that 17β-estradiol (E2) decreased osteoclast number by promoting the apoptosis of early osteoclast progenitors, but not matur...