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Osteoclast formation in bone marrow cultures from two inbred strains of mice with different bone densities. 1999

T A Linkhart, and S G Linkhart, and Y Kodama, and J R Farley, and H P Dimai, and K R Wright, and J E Wergedal, and M Sheng, and W G Beamer, and L R Donahue, and C J Rosen, and D J Baylink
J.L. Pettis VA Medical Center, Loma Linda University, Loma Linda, California, USA; Department of Biochemistry, Loma Linda University, Loma Linda, California, USA; Department of Pediatrics, Loma Linda University, Loma Linda, California 92357, USA.

For the purpose of identifying genes that affect bone volume, we previously identified two inbred mouse strains (C57BL/6J and C3H/HeJ) with large differences in femoral bone density and medullary cavity volume. The lower density and larger medullary cavity volume in C57BL/6J mice could result from either decreased formation or increased resorption or both. We recently reported evidence suggesting that bone formation was increased in vivo and that osteoblast progenitor cells are more numerous in the bone marrow of C3H/HeJ compared with C57BL/6J mice. In the present study, we determined whether osteoclast numbers in vivo and osteoclast formation from bone marrow cells in vitro might also differ between the two mouse strains. We have found that the number of osteoclasts on bone surfaces of distal humerus secondary spongiosa was 2-fold higher in 5.5-week-old C57BL/6J mice than in C3H/HeJ mice of the same age (p < 0.001). Bone marrow cells of C57BL/6J mice cocultured with Swiss/Webster mouse osteoblasts consistently produced more osteoclasts than did C3H/HeJ bone marrow cells at all ages tested from 3.5-14 weeks of age (p < 0.001). Osteoclast formation was also greater from spleen cells of 3.5-week-old C57BL/6J mice than C3H/HeJ mice. The distribution of nuclei per osteoclast and the 1, 25-dihydroxyvitamin D3 dose dependence of osteoclast production from bone marrow cells were similar. Osteoclasts that developed from both C57BL/6J and C3H/HeJ marrow cells formed pits in dentin slices. Cultures from C57BL/6J marrow cells formed 2.5-fold more pits than cultures from C3H/HeJ marrow cells (p < 0.02). We compared the abilities of C57BL/6J and C3H/HeJ osteoblasts to support osteoclast formation. When bone marrow cells from either C57BL/6J or C3H/HeJ mice were cocultured with osteoblasts from either C57BL/6J or C3H/HeJ newborn calvaria, the strain from which osteoblasts were derived did not affect the number of osteoclasts formed from marrow cells of either strain. Together, these observations suggest that genes affecting the bone marrow osteoclast precursor population may contribute to the relative differences in bone density that occur between C3H/HeJ and C57BL/6J mouse strains.

UI MeSH Term Description Entries
D008297 Male Males
D008809 Mice, Inbred C3H An inbred strain of mouse that is used as a general purpose strain in a wide variety of RESEARCH areas including CANCER; INFECTIOUS DISEASES; sensorineural, and cardiovascular biology research. Mice, C3H,Mouse, C3H,Mouse, Inbred C3H,C3H Mice,C3H Mice, Inbred,C3H Mouse,C3H Mouse, Inbred,Inbred C3H Mice,Inbred C3H Mouse
D008810 Mice, Inbred C57BL One of the first INBRED MOUSE STRAINS to be sequenced. This strain is commonly used as genetic background for transgenic mouse models. Refractory to many tumors, this strain is also preferred model for studying role of genetic variations in development of diseases. Mice, C57BL,Mouse, C57BL,Mouse, Inbred C57BL,C57BL Mice,C57BL Mice, Inbred,C57BL Mouse,C57BL Mouse, Inbred,Inbred C57BL Mice,Inbred C57BL Mouse
D010010 Osteoclasts A large multinuclear cell associated with the BONE RESORPTION. An odontoclast, also called cementoclast, is cytomorphologically the same as an osteoclast and is involved in CEMENTUM resorption. Odontoclasts,Cementoclast,Cementoclasts,Odontoclast,Osteoclast
D001854 Bone Marrow Cells Cells contained in the bone marrow including fat cells (see ADIPOCYTES); STROMAL CELLS; MEGAKARYOCYTES; and the immediate precursors of most blood cells. Bone Marrow Cell,Cell, Bone Marrow,Cells, Bone Marrow,Marrow Cell, Bone,Marrow Cells, Bone
D001862 Bone Resorption Bone loss due to osteoclastic activity. Bone Loss, Osteoclastic,Osteoclastic Bone Loss,Bone Losses, Osteoclastic,Bone Resorptions,Loss, Osteoclastic Bone,Losses, Osteoclastic Bone,Osteoclastic Bone Losses,Resorption, Bone,Resorptions, Bone
D002452 Cell Count The number of CELLS of a specific kind, usually measured per unit volume or area of sample. Cell Density,Cell Number,Cell Counts,Cell Densities,Cell Numbers,Count, Cell,Counts, Cell,Densities, Cell,Density, Cell,Number, Cell,Numbers, Cell
D005260 Female Females
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia
D013045 Species Specificity The restriction of a characteristic behavior, anatomical structure or physical system, such as immune response; metabolic response, or gene or gene variant to the members of one species. It refers to that property which differentiates one species from another but it is also used for phylogenetic levels higher or lower than the species. Species Specificities,Specificities, Species,Specificity, Species

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