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https://www.readbyqxmd.com/read/28738286/emodin-suppresses-cadmium-induced-osteoporosis-by-inhibiting-osteoclast-formation
#1
Xiao Chen, Shuai Ren, Guoying Zhu, Zhongqiu Wang, Xiaolin Wen
Environmental level of cadmium (Cd) exposure can induce bone loss. Emodin, a naturally compound found in Asian herbal medicines, could influence osteoblast/osteoclast differentiation. However, the effects of emodin on Cd-induced bone damage are not clarified. The aim of this study was to investigate the role of emodin on Cd-induced osteoporosis. Sprague-Dawley male rats were divided into three groups which were given 0mg/L, 50mg Cd/L and 50mg Cd/L plus emodin (50mg/kg body weight). Bone histological investigation, microCT analysis, metabolic biomarker determination and immunohistochemical staining were performed at the 12th week...
July 18, 2017: Environmental Toxicology and Pharmacology
https://www.readbyqxmd.com/read/28738062/analysis-of-novel-runx2-mutations-in-chinese-patients-with-cleidocranial-dysplasia
#2
Xianli Zhang, Yang Liu, Xiaozhe Wang, Xiangyu Sun, Chenying Zhang, Shuguo Zheng
Cleidocranial dysplasia (CCD) is an autosomal dominant inheritable skeletal disorder characterized by cranial dysplasia, clavicle hypoplasia and dental abnormalities. This disease is mainly caused by heterozygous mutations in RUNX2, a gene that encodes an osteoblast-specific transcription factor. In the present study, mutational analyses of RUNX2 gene were performed on four unrelated Chinese patients with CCD. Four different RUNX2 mutations were detected in these patients, including one nonsense mutation (c...
2017: PloS One
https://www.readbyqxmd.com/read/28737765/adrenocorticotropic-hormone-and-1-25-dihydroxyvitamin-d3-enhance-human-osteogenesis-in-vitro-by-synergistically-accelerating-the-expression-of-bone-specific-genes
#3
Irina L Tourkova, Li Liu, Nareerat Sutjarit, Quitterie C Larrouture, Jianhua Luo, Lisa J Robinson, Harry C Blair
To improve definition of the physical and hormonal support of bone formation, we studied differentiation of human osteoblasts in vitro at varying combinations of ACTH, 1α,25-dihydroxyvitamin D3 (1,25(OH)2D), and extracellular calcium, with and without added cortisol. Bone mineralization, alkaline phosphatase activity, and osteoblast-specific markers RunX2, osterix, and collagen I increased with 10 pM ACTH, 10 nM 1,25(OH)2D, or at 2 mM calcium with important synergistic activity of combinations of any of these stimuli...
July 24, 2017: Laboratory Investigation; a Journal of Technical Methods and Pathology
https://www.readbyqxmd.com/read/28737260/answer-to-the-comment-of-manuscript-cbin-20170431-bioinformatics-analysis-in-menopause-transition-promotes-distinct-modulation-in-calvaria-and-bone-marrow-osteoblastic-cells
#4
Karina F B Prado
We thank Dr. Xu for this opportunity to better clarify the use of the t-test for microarray data analysis and we are happy that our results are useful. Firstly, t-test when used for microarray data analysis corresponds to a version adapted for large-scale data and not the classical t-test for experiments that generate a small set of data. The Agilent Gene Spring platform (1) that we used in this study provides the version of t-test suitable for microarray data analysis, including hypothesis test correction (Benjamini-Hochberg correction or FDR)...
July 24, 2017: Cell Biology International
https://www.readbyqxmd.com/read/28737222/bioinformatics-analysis-in-menopause-transition-promotes-distinct-modulation-in-calvaria-and-bone-marrow-osteoblastic-cells
#5
Chenyu Li, Yanfei Wang, Hong Luan, Hui Zhang, Yan Xu
We read with great interest the recent report by Semeghini et al., "Menopause transition promotes distinct modulation of mRNAs and miRNAs expression in calvaria and bone marrow osteoblastic cells," which appeared on 24 May 2017 in Cell Biology International. The results of the report are very helpful for us, however, from our perspective, the author's methods in bioinformatics analysis is inappropriate: Student's t-tests is an inappropriate statistical method for detecting differentially expressed mRNA or miRNA in osteoblastic cells from calvaria of ovariectomized rats compared to control or in osteoblastic cells from bone marrow of ovariectomized rats compared to control...
July 24, 2017: Cell Biology International
https://www.readbyqxmd.com/read/28736908/bmp-7-ameliorates-cobalt-alloy-particle-induced-inflammation-by-suppressing-th17-responses
#6
Fengrong Chen, Ruisong Chen, Haoyuan Liu, Rupeng Sun, Jianming Huang, Zheyuan Huang, Guojian Jian
Metal wear debris has been shown to activate an aseptic osteolytic process that causes failure in total joint arthroplasty (TJA). This osteolysis is characterized by a proinflammatory, self-propagating immune response involving primarily macrophages, dendritic cells, and activated osteoclasts, as well as T cells and B cells. The human bone morphogenic protein (BMP)-7, on the other hand, was shown to promote osteoblast survival, and reversed the downregulation of anabolic Smad proteins and Runx2 following cobalt injury...
July 24, 2017: APMIS: Acta Pathologica, Microbiologica, et Immunologica Scandinavica
https://www.readbyqxmd.com/read/28736799/rankl-induced-osteoclastogenesis-is-suppressed-by-4-o-methylhonokiol-in-bone-marrow-derived-macrophages
#7
Kyung-Ran Park, Ji-Youn Kim, Eun-Cheol Kim, Hyung-Mun Yun, Jin Tae Hong
Magnolol, honokiol, and obovatol are well known bioactive constituents of the bark of Magnolia officinalis and have been reported to have beneficial effects in various diseases. We recently isolated a novel active compound, 4-O-methylhonokiol (4-O-MH) from the ethanol extract of M. officinalis, which was previously reported to have pharmacological effects including anti-inflammatory, anti-oxidative, and anti-aging activities. Here, we examined the pharmacological properties of 4-O-MH on osteoblast (bone-forming cells) and osteoclast (bone-resorbing cells) differentiation, and its underlying signaling pathways in primary cultured pre-osteoblasts and bone marrow macrophages...
July 24, 2017: Archives of Pharmacal Research
https://www.readbyqxmd.com/read/28735148/mechanically-competent-and-cytocompatible-polycaprolactone-borophosphosilicate-hybrid-biomaterials
#8
Dibakar Mondal, S Jeffrey Dixon, Kibret Mequanint, Amin S Rizkalla
Organic-inorganic class II hybrid materials have domain sizes at the molecular level and chemical bonding between the organic and inorganic phases. We have previously reported the synthesis of class II hybrid biomaterials from alkoxysilane-functionalized polycaprolactone (PCL) and borophosphosilicate (B2O3-P2O5-SiO2) glass (BPSG) through a non-aqueous sol-gel process. In the present study, the mechanical properties and degradability of these PCL/BPSG hybrid biomaterials were studied and compared to those of their conventional composite counterparts...
July 5, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/28733136/unexpected-bone-formation-produced-by-rankl-blockade
#9
REVIEW
Sergio Portal-Núñez, Aranzazu Mediero, Pedro Esbrit, Olga Sánchez-Pernaute, Raquel Largo, Gabriel Herrero-Beaumont
Denosumab (Dmab) is a humanized monoclonal antibody that blocks RANKL (receptor activator for nuclear factor κB ligand), thereby exerting a potent bone antiresorptive action. Dmab treatment leads to a dramatic and sustained increase in bone mass through mechanisms that are currently under debate. It is also a matter of controversy whether this potent action of Dmab could lead to intrabone dystrophic mineralization. Recent research has uncovered a possible anabolic role of Dmab involving RANKL-dependent reverse signaling in osteoblasts, and that bone marrow adipocytes can modulate osteoclastogenesis through the production of RANKL...
July 19, 2017: Trends in Endocrinology and Metabolism: TEM
https://www.readbyqxmd.com/read/28733032/pilose-antler-polypeptides-potentiates-osteoblast-differentiation-and-inhibits-osteoclastogenesis-via-manipulating-the-nf-%C3%AE%C2%BAb-pathway
#10
Guangwang Liu, Chao Ma, Peian Wang, Peiying Zhang, Xinhua Qu, Shen Liu, Zanjing Zhai, Degang Yu, Juan Gao, Jun Liang, Weixiang Dai, Lindong Zhou, Mengjiao Xia, Huilin Yang
Bones are inflexible yet ever-changing metabolic organs, and bone homeostasis is maintained through two delicately regulated processes: bone construction and bone reabsorption. An imbalance in bone metabolism is linked to most orthopedic diseases, including osteoporosis and rheumatoid arthritis. Importantly, tumor necrosis factor-α (TNF-α) blocks osteoblast differentiation and stimulates osteoclast formation, resulting in delayed deposition of new bone and accelerated bone resorption, especially in rheumatoid arthritis patients with inflammatory conditions...
July 18, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28732850/promising-bio-composites-of-polypyrrole-and-chitosan-surface-protective-and-in-vitro-biocompatibility-performance-on-316l-ss-implants
#11
A Madhan Kumar, Bharathi Suresh, Soumyadip Das, I B Obot, Akeem Yusuf Adesina, Suresh Ramakrishna
Advanced biomedical materials can potentially be developed from combinations of natural biodegradable polymers and synthetic polymers. We synthesized bioactive composites based on polypyrrole/chitosan through in-situ electrochemical polymerization in oxalic acid medium. Surface characterization results revealed the influence of chitosan inclusion on polypyrrole (PPy) surface morphology. Contact angle results confirmed the enhancement in surface hydrophilicity due to the addition of chitosan into the PPy matrix...
October 1, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28732776/rad-gtpase-is-essential-for-the-regulation-of-bone-density-and-bone-marrow-adipose-tissue-in-mice
#12
Catherine N Withers, Drew M Brown, Innocent Byiringiro, Matthew R Allen, Keith W Condon, Jonathan Satin, Douglas A Andres
The small GTP-binding protein Rad (RRAD, Ras associated with diabetes) is the founding member of the RGK (Rad, Rem, Rem2, and Gem/Kir) family that regulates cardiac voltage-gated Ca(2+) channel function. However, its cellular and physiological functions outside of the heart remain to be elucidated. Here we report that Rad GTPase function is required for normal bone homeostasis in mice, as Rad deletion results in significantly lower bone mass and higher bone marrow adipose tissue (BMAT) levels. Dynamic histomorphometry in vivo and primary calvarial osteoblast assays in vitro demonstrate that bone formation and osteoblast mineralization rates are depressed, while in vitro osteoclast differentiation is increased, in the absence of Rad...
July 18, 2017: Bone
https://www.readbyqxmd.com/read/28732358/lenalidomide-restores-the-osteogenic-differentiation-of-bone-marrow-mesenchymal-stem-cells-from-multiple-myeloma-patients-via-deactivating-notch-signaling-pathway
#13
Juan Guo, Chengming Fei, Youshan Zhao, Sida Zhao, Qingqing Zheng, Jiying Su, Dong Wu, Xiao Li, Chunkang Chang
Multiple myeloma (MM) always presents osteolytic bone lesions, resulting from the abnormal osteoblastic and osteoclastic function in patients. MM patients exhibit the impairment of osteogenic differentiation of BMMSCs (bone marrow mesenchymal stem cells) and osteoblast deficiency. Effects of the drug, lenalidomide on the osteoblastic functions and the involved mechanisms remain unexplored. In the present study, it is observed that the osteogenic differentiation of BMMSCs from MM patients (MM-MSCs) is impaired and activation of Notch signaling pathway in MM-MSCs is abnormal...
July 15, 2017: Oncotarget
https://www.readbyqxmd.com/read/28732226/intermittent-administration-of-parathyroid-hormone-ameliorated-alveolar-bone-loss-in-experimental-periodontitis-in-streptozotocin-induced-diabetic-rats
#14
Helin Chen, Taozi Fu, Yuanyuan Ma, Xiangnan Wu, Xianxian Li, Xinyi Li, Jiefei Shen, Hang Wang
OBJECTIVE: Intermittent administration of parathyroid hormone (PTH) has been demonstrated to have anabolic effects on bone metabolism and is approved for use in the treatment of osteoporosis. This study evaluates the role of intermittent PTH administration on alveolar bone loss in streptozotocin (STZ)-induced diabetic rats. DESIGN: Fifty male Sprague Dawley rats were randomly divided into the following five groups: (1) a control group (saline placebo without ligature and STZ injection), (2) a PTH group (PTH administration without ligature and STZ injection), (3) an L group (saline placebo with ligature), (4) an L+STZ group (saline placebo with ligature and STZ injection), and (5) an L+STZ+PTH group (PTH administration with ligature and STZ injection)...
July 5, 2017: Archives of Oral Biology
https://www.readbyqxmd.com/read/28731788/identification-of-osr2-transcriptional-target-genes-in-palate-development
#15
X Fu, J Xu, P Chaturvedi, H Liu, R Jiang, Y Lan
Previous studies have identified the odd-skipped related 2 (Osr2) transcription factor as a key intrinsic regulator of palatal shelf growth and morphogenesis. However, little is known about the molecular program acting downstream of Osr2 in the regulation of palatogenesis. In this study, we isolated palatal mesenchyme cells from embryonic day 12.5 (E12.5) and E13.5 Osr2(RFP/+) and Osr2(RFP/-) mutant mouse embryos and performed whole transcriptome RNA sequencing analyses. Differential expression analysis of the RNA sequencing datasets revealed that expression of 70 genes was upregulated and expression of 61 genes was downregulated by >1...
July 1, 2017: Journal of Dental Research
https://www.readbyqxmd.com/read/28731328/bisphosphonate-functionalized-hydroxyapatite-nanoparticles-for-the-delivery-of-the-bromodomain-inhibitor-jq1-in-the-treatment-of-osteosarcoma
#16
Victoria Wu, Jarrett Mickens, Vuk Uskokovic
Osteosarcoma (OS) is one of the most common neoplasia among children and its survival statistics have been stagnating since the combinatorial anticancer therapy triad was first introduced. Here we report on the assessment of the effect of hydroxyapatite (HAp) nanoparticles loaded with medronate, the simplest bisphosphonate, as a bone-targeting agent and JQ1, a small-molecule bromodomain inhibitor, as a chemotherapeutic in different 2D and 3D K7M2 OS in vitro models. Both additives decreased the crystallinity of HAp, but the effect was more intense for medronate because of its higher affinity for HAp...
July 21, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28731325/bioinspired-and-biomimetic-agnps-gentamicin-embedded-silk-fibroin-coatings-for-robust-antibacterial-and-osteogenetic-applications
#17
Wenhao Zhou, Zhaojun Jia, Pan Xiong, Jianglong Yan, Yangyang Li, Ming Li, Yan Cheng, Yufeng Zheng
With the progressively increasing demand for orthopedic Ti implants, the balance realization between two primary complications restricting implants applications is imperative needed to be solved that the lack of bone tissue integration and biomedical device-associated infections (BAI), where emergence of multi-resistance bacteria make it worse. Notably, a combination of silver nanoparticles (AgNPs) and a kind of antibiotic can synergistically inhibit bacterial growth, where low concentration of AgNPs has been confirmed to promote the proliferation and osteogenesis of osteoblasts...
July 21, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28731198/gsk-3%C3%AE-inhibition-suppresses-instability-induced-osteolysis-by-a-dual-action-on-osteoblast-and-osteoclast-differentiation
#18
Mehdi Amirhosseini, Rune Vinther Madsen, K Jane Escott, Mathias Bostrom, F Patrick Ross, Anna Fahlgren
Currently, there are no medications available to treat aseptic loosening of orthopedic implants. Using osteoprotegerin fusion protein (OPG-Fc), we previously blocked instability-induced osteoclast differentiation and peri-prosthetic osteolysis. Wnt/β-catenin signaling, which regulates OPG secretion from osteoblasts, also modulates the bone tissue response to mechanical loading. We hypothesized that activating Wnt/β-catenin signaling by inhibiting glycogen synthase kinase-3β (GSK-3β) would reduce instability-induced bone loss through regulation of both osteoblast and osteoclast differentiation...
July 21, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/28731168/osteoclast-regulation-of-osteoblasts-via-rank%C3%A2-rankl-reverse-signal-transduction-in%C3%A2-vitro
#19
Shiqian Zhang, Xiaoyu Wang, Guojun Li, Yang Chong, Jie Zhang, Xinzhen Guo, Baoxin Li, Zhenggang Bi
The treatment of osteoporosis typically inhibits the activity of osteoclasts, which subsequently results in the suppression of bone formation and maintenance, however the underlying mechanism remains to be elucidated. The receptor activator of nuclear factor κ‑B ligand (RANKL)‑receptor activator of nuclear factor κ‑B (RANK) signaling axis is important in the osteoblast regulation of osteoclasts. RANKL surface‑bound molecules expressed on T cells stimulate a reverse signaling transduction in order to regulate the T cells, therefore the present study hypothesized that RANKL expressed on osteoblasts may transfer reverse signals to regulate osteoblasts...
July 20, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28731167/high-expression-of-trim29%C3%A2-atdc-contributes-to-poor-prognosis-and-tumor-metastasis-by-inducing-epithelial%C3%A2-mesenchymal-transition-in-osteosarcoma
#20
Si-Xiang Zeng, Qing-Chun Cai, Chi-Hua Guo, Li-Qiang Zhi, Xing Dai, Dang-Feng Zhang, Wei Ma
The association of TRIM29 overexpression with cancer progression and poor clinical prognosis has been reported in the context of several types of cancers. In the present study, we investigated the prognostic relevance of TRIM29 and its involvement in the progression of human osteosarcoma. To the best of our knowledge, this is the first study to demonstrate a major role of TRIM29 in osteosarcoma. Our results showed that the expression of TRIM29 in osteosarcoma tissues was much higher than that in normal bone tissues...
July 21, 2017: Oncology Reports
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