Low-dose estrogen treatment suppresses periosteal bone formation in response to mechanical loading

Bone ◽  
2006 ◽  
Vol 39 (6) ◽  
pp. 1261-1267 ◽  
Author(s):  
Leanne K. Saxon ◽  
Charles H. Turner
Keyword(s):  
Bone Formation ◽  
Mechanical Loading ◽  
Low Dose ◽  
Estrogen Treatment ◽  
Periosteal Bone Formation

Exercise and Mechanical Loading Increase Periosteal Bone Formation and Whole Bone Strength in C57BL/6J Mice but Not in C3H/Hej Mice

2000 ◽  
Vol 66 (4) ◽  
pp. 298-306 ◽  
Author(s):  
Y. Kodama ◽  
Y. Umemura ◽  
S. Nagasawa ◽  
W. G. Beamer ◽  
L. R. Donahue ◽  
...  
Keyword(s):  
Bone Formation ◽  
Bone Strength ◽  
Mechanical Loading ◽  
Periosteal Bone Formation

scholarly journals Effect of Mechanical Loading Timeline on Periosteal Bone Formation

2008 ◽  
Vol 3 (2) ◽  
pp. 176-187 ◽  
Author(s):  
Hiroko N. MATSUMOTO ◽  
Yoshihisa KOYAMA ◽  
Kazuo TAKAKUDA
Keyword(s):  
Bone Formation ◽  
Mechanical Loading ◽  
Periosteal Bone Formation

Bisphosphonates do not inhibit periosteal bone formation in estrogen deficient animals and allow enhanced bone modeling in response to mechanical loading

Bone ◽  
2010 ◽  
Vol 46 (1) ◽  
pp. 203-207 ◽  
Author(s):  
Anthony Feher ◽  
Andrew Koivunemi ◽  
Mark Koivunemi ◽  
Robyn K. Fuchs ◽  
David B. Burr ◽  
...  
Keyword(s):  
Bone Formation ◽  
Mechanical Loading ◽  
Bone Modeling ◽  
Periosteal Bone Formation

Mice lacking thrombospondin 2 show an atypical pattern of endocortical and periosteal bone formation in response to mechanical loading

Bone ◽  
2006 ◽  
Vol 38 (3) ◽  
pp. 310-316 ◽  
Author(s):  
Kurt D. Hankenson ◽  
Brandon J. Ausk ◽  
Steven D. Bain ◽  
Paul Bornstein ◽  
Ted S. Gross ◽  
...  
Keyword(s):  
Bone Formation ◽  
Mechanical Loading ◽  
Periosteal Bone Formation

scholarly journals Pharmacological inhibition of TAK1, with the selective inhibitor takinib, alleviates clinical manifestation of arthritis in CIA mice

2019 ◽  
Vol 21 (1) ◽  
Author(s):  
Scott A. Scarneo ◽  
Liesl S. Eibschutz ◽  
Phillip J. Bendele ◽  
Kelly W. Yang ◽  
Juliane Totzke ◽  
...  
Keyword(s):  
Rheumatoid Arthritis ◽  
Bone Resorption ◽  
Bone Formation ◽  
Transforming Growth Factor Beta ◽  
Transforming Growth Factor ◽  
Inflammatory Diseases ◽  
Cartilage Damage ◽  
Cytokine Signaling ◽  
Periosteal Bone Formation ◽  
Bone Width

Abstract Objectives To examine the ability of takinib, a selective transforming growth factor beta-activated kinase 1 (TAK1) inhibitor, to reduce the severity of murine type II collagen-induced arthritis (CIA), and to affect function of synovial cells. Methods Following the induction of CIA, mice were treated daily with takinib (50 mg/kg) and clinical scores assessed. Thirty-six days post-CIA induction, histology was performed on various joints of treated and vehicle-treated animals. Inflammation, pannus, cartilage damage, bone resorption, and periosteal bone formation were quantified. Furthermore, pharmacokinetics of takinib were evaluated by LC-MS in various tissues. Rheumatoid arthritis fibroblast-like synoviocytes (RA-FLS) cells were cultured with 10 μM takinib and cytokine secretion analyzed by cytokine/chemokine proteome array. Cytotoxicity of takinib for RA-FLS was measured with 24 to 48 h cultures in the presence or absence of tumor necrosis factor (TNF). Results Here, we show takinib’s ability to reduce the clinical score in the CIA mouse model of rheumatoid arthritis (RA) (p < 0.001). TAK1 inhibition reduced inflammation (p < 0.01), cartilage damage (p < 0.01), pannus, bone resorption, and periosteal bone formation and periosteal bone width in all joints of treated mice compared to vehicle treated. Significant reduction of inflammation (p < 0.004) and cartilage damage (p < 0.004) were observed in the knees of diseased treated animals, with moderate reduction seen in the forepaws and hind paws. Furthermore, the pharmacokinetics of takinib show rapid plasma clearance (t½ = 21 min). In stimulated RA-FLS cells, takinib reduced GROα, G-CSF, and ICAM-1 pro-inflammatory cytokine signaling. Conclusion Our findings support the hypothesis that TAK1 targeted therapy represents a novel therapeutic axis to treat RA and other inflammatory diseases.

scholarly journals Effect of mechanical loading on insulin-like growth factor-I gene expression in rat tibia

2007 ◽  
Vol 192 (1) ◽  
pp. 131-140 ◽  
Author(s):  
Christianne M A Reijnders ◽  
Nathalie Bravenboer ◽  
Annechien M Tromp ◽  
Marinus A Blankenstein ◽  
Paul Lips
Keyword(s):  
Bone Formation ◽  
Mrna Expression ◽  
Mechanical Loading ◽  
Mechanical Stimulation ◽  
Molecular Mechanisms ◽  
Bone Marrow Cells ◽  
Mechanical Stimuli ◽  
Igf I ◽  
Female Wistar Rats ◽  
Tibia Shaft

Mechanical loading plays an essential role in maintaining skeletal integrity. Mechanical stimulation leads to increased bone formation. However, the cellular and molecular mechanisms that are involved in the translation of mechanical stimuli into bone formation, are not completely understood. Growth factors and osteocytes, which act as mechanosensors, play a key role during the bone formation after mechanical stimulation. The aim of this study was to characterize the role of IGF-I in the translation of mechanical stimuli into bone formation locally in rat tibiae. Fifteen female Wistar rats were randomly assigned to three groups (n = 5): load, sham-loaded, and control. The four-point bending model of Forwood and Turner was used to induce a single period of mechanical loading on the tibia shaft. The effects of mechanical loading on IGF-I mRNA expression were determined with non-radioactive in situ hybridization on decalcified tibiae sections, 6 h after the loading session. Endogenous IGF-I mRNA was expressed in trabecular and cortical osteoblasts, some trabecular and sub-endocortical osteocytes, intracortical endothelial cells of blood vessels, and periosteum. Megakaryocytes, macrophages, and myeloid cells also expressed IGF-I mRNA. In the growth plate, IGF-I mRNA was located in proliferative and hypertrophic chondrocytes. Mechanical loading did not affect the IGF-I mRNA expression in osteoblasts, bone marrow cells, and chondrocytes, but the osteocytes at the endosteal side of the shaft showed a twofold increase of IGF-I mRNA expression. The proportion of IGF-I mRNA positive osteocytes in loaded tibiae was 29.3 ± 12.9% (mean ± s.d.; n = 5), whereas sham-loaded and contra-lateral control tibiae exhibited 16.7 ± 4.4% (n = 5) and 14.7 ± 4.2% (n = 10) respectively (P < 0.05). Lamellar bone formation after a single mechanical loading session was observed at the endosteal side of the shaft. In conclusion, a single loading session results in a twofold up-regulation of IGF-I mRNA synthesis in osteocytes which are present in multiple layers extending into the cortical bone of mechanically stimulated tibia shaft 6 h after loading. This supports the hypothesis that IGF-I, which is located in osteocytes, is involved in the translation of mechanical stimuli into bone formation.

scholarly journals Intermittent PTH stimulates periosteal bone formation by actions on post-mitotic preosteoblasts

Bone ◽  
2009 ◽  
Vol 44 (2) ◽  
pp. 275-286 ◽  
Author(s):  
Robert L. Jilka ◽  
Charles A. O'Brien ◽  
A. Afshan Ali ◽  
Paula K. Roberson ◽  
Robert S. Weinstein ◽  
...  
Keyword(s):  
Bone Formation ◽  
Periosteal Bone Formation ◽  
Intermittent Pth

Odanacatib treatment increases femoral periosteal bone formation in the estrogen-deficient adult rhesus monkeys

Bone ◽  
2010 ◽  
Vol 47 ◽  
pp. S35-S36
Author(s):  
B.L. Pennypacker ◽  
T. Cusick ◽  
G.A. Wesolowski ◽  
D. Kimmel ◽  
L.T. Duong⁎
Keyword(s):  
Bone Formation ◽  
Rhesus Monkeys ◽  
Periosteal Bone Formation

Osteoblast/osteocyte-derived interleukin-11 regulates osteogenesis and systemic adipogenesis

2021 ◽  
Author(s):  
Bingzi Dong ◽  
Masahiro Hiasa ◽  
Itsuro Endo ◽  
Yukiyo Ohnishi ◽  
Takeshi Kondo ◽  
...  
Keyword(s):  
Metabolic Syndrome ◽  
Adipose Tissue ◽  
Bone Formation ◽  
Mechanical Loading ◽  
Therapeutic Approaches ◽  
New Therapeutic Approaches ◽  
Mechanical Unloading ◽  
Enhanced Expression ◽  
Wnt Inhibitors ◽  
Interleukin 11

Abstract Exercise offers mechanical loading to the bone, while it stimulates energy expenditure in the adipose tissue. Thus, bone may secrete a factor to communicate with adipose tissue in response to mechanical loading. Interleukin (IL)-11 is expressed in the bone, upregulated by mechanical loading, enhances osteogenesis and suppresses adipogenesis. Systemic IL-11 deletion (IL-11−/−) exhibited reduced bone mass, suppressed bone formation response to mechanical loading, enhanced expression of Wnt inhibitors, and suppressed Wnt signaling. Enhancement of bone resorption under mechanical unloading was unaffected. Unexpectedly, IL-11−/− mice showed increased systemic adiposity and glucose intolerance. Osteoblast/osteocyte-specific IL-11 deletion in osteocalcin-Cre;IL-11fl/fl mice showed reduced serum IL-11, blunted bone formation under mechanical loading, and increased systemic adiposity similar to IL-11−/− mice. Adipocyte-specific IL-11 deletion in adiponectin-Cre; IL-11fl/fl mice exhibited no abnormality. Thus, IL-11 from osteoblast/osteocyte controls both osteogenesis and systemic adiposity in response to mechanical loading. These findings may bring new therapeutic approaches to osteoporosis and metabolic syndrome.

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