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Condition: Osteoporosis

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Total 136 results found since Jan 2013.

Hyperglycemia Suppresses RANKL-Induced Osteoclast Differentiation through LXR β Expression in RAW264.7 Cells.
Hyperglycemia Suppresses RANKL-Induced Osteoclast Differentiation through LXRβ Expression in RAW264.7 Cells. J Nutr Sci Vitaminol (Tokyo). 2017;63(1):28-34 Authors: Tanaka T, Takei Y, Zaima N, Moriyama T, Yamanouchi D Abstract There have been reports that hyperglycemia suppresses osteoclast (OCL) differentiation, although the underlying mechanism is poorly understood. Here we demonstrated that high glucose suppresses OCL differentiation through activation of liver X receptor (LXR) β, a recently reported glucose-sensing nuclear receptor. The effect of hyperglycemia on osteoclastogenesis was tested in ...
Source: Journal of Nutritional Science and Vitaminology - April 4, 2017 Category: Nutrition Tags: J Nutr Sci Vitaminol (Tokyo) Source Type: research

Bre Enhances Osteoblastic Differentiation by Promoting the Mdm2 ‐Mediated Degradation of p53
Abstract Bre is a conserved cellular protein expressed in various tissues. Its major function includes DNA damage repair and anti‐apoptosis. Recent studies indicate that Bre is potentially involved in stem cell differentiation although pathophysiological significance along with the molecular mechanisms is still unclear. Here, we report that Bre protein was substantially expressed in the bone tissue and its expression was highly upregulated during the osteogenic differentiation. To test a hypothesis that Bre plays functional roles in the process of osteogenic differentiation, we examined the expression of Bre in an osteop...
Source: Stem Cells - April 24, 2017 Category: Stem Cells Authors: Fujun Jin, Yiliang Wang, Xiaojing Wang, Yanting Wu, Xiaoyan Wang, Qiuying Liu, Yexuan Zhu, Enqi Liu, Jianglin Fan, Yifei Wang Tags: Tissue ‐Specific Stem Cells Source Type: research

MicroRNA-433-3p promotes osteoblast differentiation through targeting DKK1 expression
In this study, mouse primary bone marrow cells and osteoblast cell lines were used. Lucifer ase reporter assay and western blotting methods were employed to validate if miRNA-433-3p epigenetically regulated DKK1 translation. Rat bone marrow derived osteoblasts were infected with lentivirus vector in which miR-433-3p was constructed. The authors constructed lentivirus mediated miRNA-433-3p stable expression and examined the alkaline phosphatase (ALP) activity and mineral deposition level in vitro. In situ hybridization method was used to observe miR-433-3p in primary osteoblasts. We built up an OVX rat model to mimic postme...
Source: PLoS One - June 19, 2017 Category: Biomedical Science Authors: Xiaolin Tang Source Type: research

Mangiferin protects osteoblast against oxidative damage by modulation of ERK5/Nrf2 signaling.
This study indicated that MAN can protect osteoblast against oxidative damage by modulation of ERK5/Nrf2 signaling, which can be new agent for osteoporosis. PMID: 28669729 [PubMed - as supplied by publisher]
Source: Biochemical and Biophysical Research communications - June 29, 2017 Category: Biochemistry Authors: Xia G, Li X, Yin X, Ding H, Qiao Y Tags: Biochem Biophys Res Commun Source Type: research

Liraglutide, a glucagon-like peptide-1 receptor agonist, facilitates osteogenic proliferation and differentiation in MC3T3-E1 cells through phosphoinositide 3-kinase (PI3K)/protein kinase B (AKT), extracellular signal-related kinase (ERK)1/2, and cAMP/protein kinase A (PKA) signaling pathways involving β-catenin.
Abstract Previous studies have proven that Glucagon-like peptide-1 (GLP-1) and its receptor agonist exert favorable anabolic effects on skeletal metabolism. However, whether GLP-1could directly impact osteoblast-mediated bone forming is still controversial, and the underlying molecular mechanism remains to be elucidated. Thus in this paper, we investigated the effects of liraglutide, a glucagon-like peptide-1 (GLP-1) receptor agonist, on murine MC3T3-E1 preosteoblasts proliferation and differentiation and explored the potential cellular basis. Our study confirmed the presence of GLP-1R in MC3T3-E1, and demonstrate...
Source: Experimental Cell Research - September 14, 2017 Category: Cytology Authors: Wu X, Li S, Xue P, Li Y Tags: Exp Cell Res Source Type: research

The flavonol glycoside icariin promotes bone formation in growing rats by activating the cAMP signaling pathway in primary cilia of osteoblasts Signal Transduction
In this study, using rat calvarial osteoblast culture and rat bone growth models, we demonstrated that icariin promotes bone formation by activating the cAMP/protein kinase A (PKA)/cAMP response element–binding protein (CREB) pathway requiring functional primary cilia of osteoblasts. We found that icariin increases the peak bone mass attained by young rats and promotes the maturation and mineralization of rat calvarial osteoblasts. Icariin activated cAMP/PKA/CREB signaling of the osteoblasts by increasing intracellular cAMP levels and facilitating phosphorylation of both PKA and CREB. Blocking cAMP/PKA/CREB signaling wit...
Source: Journal of Biological Chemistry - December 22, 2017 Category: Chemistry Authors: Wengui Shi, Yuhai Gao, Yuanyuan Wang, Jian Zhou, Zhenlong Wei, Xiaoni Ma, Huiping Ma, Cory J. Xian, Jufang Wang, Keming Chen Tags: Molecular Bases of Disease Source Type: research

MiR-30a attenuates osteoclastogenesis via targeting DC-STAMP-c-Fos-NFATc1 signaling.
In conclusion, miR-30a attenuated osteoclastogenesis via suppression of DC-STAMP-c-Fos-NFATc1 signaling pathway. On these grounds, this study may reveal a new promising target for the treatment of osteoporosis and other osteopenic disorders. PMID: 29312525 [PubMed]
Source: American Journal of Translational Research - January 11, 2018 Category: Research Tags: Am J Transl Res Source Type: research

Leukotriene D4 induces cellular senescence in osteoblasts.
Abstract Aging is associated with the development of osteoporosis, in which cellular senescence in osteoblasts plays a key role. Leukotriene D4 (LTD4), an important cysteinyl leukotriene (cysLT), is a powerful pro-inflammatory mediator formed from arachidonic acid. However, little information regarding the effects of LTD4 on the pathogenesis of osteoporosis has been reported before. In the present study, we defined the physiological roles of LTD4 in cellular senescence in osteoblasts. Our results indicate that LTD4 treatment decreased the expression of SIRT1 in a dose-dependent manner in MC3T3-E1 osteoblastic cell...
Source: International Immunopharmacology - March 24, 2018 Category: Allergy & Immunology Authors: Wei J, Chen S, Guo W, Feng B, Yang S, Huang C, Chu J Tags: Int Immunopharmacol Source Type: research

MicroRNA-137 dysregulation predisposes to osteoporotic fracture by impeding ALP activity and expression via suppression of leucine-rich repeat-containing G-protein-coupled receptor 4 expression.
In conclusion, these data prove that the overexpression of miR-137 was associated with an altered risk of fracture in patients with osteoporosis, and can be used as a biomarker for the prediction of risk of fracture in osteoporosis. PMID: 29786747 [PubMed - as supplied by publisher]
Source: International Journal of Molecular Medicine - May 17, 2018 Category: Molecular Biology Authors: Liu X, Xu X Tags: Int J Mol Med Source Type: research

Isoquercitrin promotes the osteogenic differentiation of osteoblasts and BMSCs via the RUNX2 or BMP-pathway.
Authors: Li M, Zhang C, Li X, Lv Z, Chen Y, Zhao J Abstract Isoquercitrin is widely present in fruits, vegetables and medicinal herbs. As a natural phytoestrogen, isoquercitrin has been considered a possible osteoporosis prevention option to avoid the risk of hormone therapy. In this work, we studied the effects of isoquercitrin on the cell proliferation and osteogenic differentiation of osteoblasts and bone mesenchymal stem cells (BMSCs), as well as the molecular mechanism of isoquercitrin action. The cell proliferation of osteoblasts and BMSCs was promoted by isoquercitrin at low concentrations. High concentratio...
Source: Connective Tissue Research - June 4, 2018 Category: Research Tags: Connect Tissue Res Source Type: research

Immunization with Na+/K+ ATPase DR peptide prevents bone loss in an ovariectomized rat osteoporosis model.
Abstract Osteoporosis is characterized by decreased bone strength and microarchitectural deterioration of bone tissue leading to an increase in bone fracture. Here we report a new agent named DR peptide, a conserved sequence of Na+/K+ ATPase (NKA), can be used to prevent osteoporosis. Our results showed that immunization with DR peptide conjunct with Keyhole limpet hemocyanin (DR-KLH) significantly strengthened trabecular bone and improved bone mineral density of femur and the 5th lumbar in the ovariectomized (OVX) rats when compared with those in OVX rats immunized with KLH alone. To study the underlying mechanis...
Source: Biochemical Pharmacology - August 19, 2018 Category: Drugs & Pharmacology Authors: Xiong S, Yang X, Yan X, Hua F, Zhu M, Guo L, Wu Z, Bian JS Tags: Biochem Pharmacol Source Type: research

CRNDE impacts the proliferation of osteoclast by estrogen deficiency in postmenopausal osteoporosis.
CONCLUSIONS: We found that lncRNA CRNDE was closely related to the postmenopausal osteoporosis with estrogen deficiency. CRNDE may be involved in the development and progression of postmenopausal osteoporosis in the absence of estrogen and become a potential target for treating. PMID: 30280760 [PubMed - in process]
Source: European Review for Medical and Pharmacological Sciences - October 5, 2018 Category: Drugs & Pharmacology Tags: Eur Rev Med Pharmacol Sci Source Type: research

Serpina3n, dominantly expressed in female osteoblasts, suppresses the phenotypes of differentiated osteoblasts in mice.
In conclusion, we first found Serpina3n as the most female osteoblast-dominant gene. Serpina3n exerts a suppression of the osteoblast phenotypes such as Col1a1 expression and ALP activity in differentiated osteoblasts, which might partly explain sex differences of the osteoblast phenotypes in mice. PMID: 30304388 [PubMed - as supplied by publisher]
Source: Endocrinology - October 9, 2018 Category: Endocrinology Authors: Ishida M, Kawao N, Okada K, Tatsumi K, Sakai K, Nishio K, Kaji H Tags: Endocrinology Source Type: research

Activation of TGR5 promotes osteoblastic cell differentiation and mineralization
Publication date: December 2018Source: Biomedicine & Pharmacotherapy, Volume 108Author(s): Qingfeng Wang, Guoqiang Wang, Bin Wang, Huilin YangAbstractImpairment of normal osteoblast differentiation has been associated with bone loss-related disorders, such as osteoporosis. Takeda G-protein coupled receptor 5 (TGR5) has been identified as an important modulator of bile acid and energy homeostasis. Little information regarding the effects of TGR5 on osteoblastic bone formation and matrix mineralization has been reported before. In the current study, we found that TGR5 was expressed in osteoblast-like cell line MC3T3-E1 cells...
Source: Biomedicine and Pharmacotherapy - October 16, 2018 Category: Drugs & Pharmacology Source Type: research

Deficiency of lrp4 in zebrafish and human LRP4 mutation induce aberrant activation of Jagged-Notch signaling in fin and limb development.
Abstract Low-density lipoprotein receptor-related protein 4 (LRP4) is a multi-functional protein implicated in bone, kidney and neurological diseases including Cenani-Lenz syndactyly (CLS), sclerosteosis, osteoporosis, congenital myasthenic syndrome and myasthenia gravis. Why different LRP4 mutation alleles cause distinct and even contrasting disease phenotypes remain unclear. Herein, we utilized the zebrafish model to search for pathways affected by a deficiency of LRP4. The lrp4 knockdown in zebrafish embryos exhibits cyst formations at fin structures and the caudal vein plexus, malformed pectoral fins, defectiv...
Source: Cellular and Molecular Life Sciences : CMLS - October 16, 2018 Category: Cytology Authors: Tian J, Shao J, Liu C, Hou HY, Chou CW, Shboul M, Li GQ, El-Khateeb M, Samarah OQ, Kou Y, Chen YH, Chen MJ, Lyu Z, Chen WL, Chen YF, Sun YH, Liu YW Tags: Cell Mol Life Sci Source Type: research