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https://www.readbyqxmd.com/read/29138859/17%C3%AE-estradiol-attenuates-ovariectomy%C3%A2-induced-bone-deterioration-through-the-suppression-of-the-epha2-ephrina2-signaling-pathway
#1
Lianyong Liu, Lin Zhou, Xiaorong Yang, Qi Liu, Ling Yang, Chao Zheng, Yongling Zhao, Zhenlin Zhang, Xiaohong Luo
The present study aimed to investigate whether 17β‑estradiol (E2) exerts protective effects on bone deterioration induced by ovariectomy (OVX) through the ephA2/ephrinA2 signaling pathway in rats. Female rats were subjected to OVX, sham surgeryor OVX+E2 treatment. Levels of biomarkers were measured in serum and urine. Hematoxylin and eosin staining was performed on paraffin‑embedded bone sections. Expression of genes and proteins was analyzed by reverse transcription‑quantitative polymerase chain reaction and western blotting, respectively...
November 14, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29138818/%C3%AE-%C3%A2-ecdysterone-promotes-autophagy-and-inhibits-apoptosis-in-osteoporotic-rats
#2
Yang-Hua Tang, Zhen-Shuang Yue, Da-Wei Xin, Lin-Ru Zeng, Zhen-Fei Xiong, Zhong-Qing Hu, Can-Da Xu
Osteoporosis is an aging process of skeletal tissues with characteristics of reductions in bone mass and microarchitectural deterioration of bone tissue. The present study aimed to investigate the effects of glucocorticoid‑induced osteoporosis on osteoblasts and to examine the roles of β‑ecdysterone (β‑Ecd) involved. In the present study, an in vivo model of osteoporosis was established through the subcutaneous implantation of prednisolone (PRED) into Sprague‑Dawley rats, with or without a subcutaneous injection of β‑Ecd (5 or 10 mg/kg body weight)...
November 14, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29138637/regulation-of-osteogenic-differentiation-of-placental-derived-mesenchymal-stem-cells-by-insulin-like-growth-factors-and-low-oxygen-tension
#3
Amer Youssef, Victor K M Han
Placental mesenchymal stem cells (PMSCs) are multipotent cells that can differentiate in vitro to multiple lineages, including bone. Insulin-like growth factors (IGFs, IGF-1 and IGF-2) participate in maintaining growth, survival, and differentiation of many stem cells, including osteoprogenitors. Low oxygen tension (PO2) can maintain stem cell multipotency and impede osteogenic differentiation. In this study, we investigated whether PMSC osteogenic differentiation is influenced by low PO2 and by IGFs. Our results indicated that low PO2 decreased osteogenic markers RUNX2 and OPN; however, re-exposure to higher oxygen tension (room air) restored differentiation...
2017: Stem Cells International
https://www.readbyqxmd.com/read/29136778/zuogui-pill-improves-the-dexamethasone-induced-osteoporosis-progression-in-zebrafish-larvae
#4
Heng Yin, Shanfu Wang, Yafeng Zhang, Mao Wu, JianWei Wang, Yong Ma
The current study was to evaluate the protective effects of Chinese medicine prescription Zuogui Pill (ZGP) on osteoporosis (OP) in zebrafish larvae induced by dexamethasone. Alizarin Red staining, calcium and phosphorus determination were performed to evaluate the effect of ZGP on bone mineralization. Hydroxyproline (HP), Alkaline phosphatase (ALP), and tartrate resistant acid phosphatase (TRAP) were also measured by commercial kits. We found that ZGP had positive effects in increasing bone mineral content (BMC), strengthening bone biomechanical, promoting bone formation, inhibiting bone resorption, and mediating protein levels of TGF-β1/Smads signaling pathway...
November 7, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29135229/effects-of-nh4-k-and-mg2-and-ca2-on-the-cesium-adsorption-desorption-in-binding-sites-of-vermiculitized-biotite
#5
Xiangbiao Yin, Xinpeng Wang, Hao Wu, Hideharu Takahashi, Yusuke Inaba, Toshihiko Ohnuki, Kenji Takeshita
The reversibility of cesium adsorption in contaminated soil is largely dependent on its interaction with micaceous minerals, which may be greatly influenced by various cations. Herein, we systematically investigated the effects of NH4+, K+, Mg2+, and Ca2+ on the adsorption/desorption of Cs+ into different binding sites of vermiculitized biotite (VB). Original VB was initially saturated by NH4+, K+, or Mg2+; we then evaluated the adsorption of Cs+ on three treated VBs, and the desorption by extraction with NH4+, K+, Mg2+, or Ca2+ was further evaluated...
November 14, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/29131664/tissue-repair-after-selective-alveolar-corticotomy-in-orthodontic-patients-a-preliminary-study
#6
Raquel Bueno Medeiros, Fabio Ramoa Pires, Alpdogan Kantarci, Jonas Capelli
OBJECTIVES: To analyze histologic findings of bone remodeling at the time of surgery and 90 days later at corticotomized and noncorticotomized sites. MATERIALS AND METHODS: Eight adult patients with bilaterally inclined mandibular molars were included in this split-mouth study. Corticotomy was performed on the test side, and bone was harvested on both mandibular hemi-arches. Bone blocks were shipped to Forsyth Institute lab (Boston, Mass). After surgery, cantilevers were activated to upright inclined mandibular molars on both sides...
November 13, 2017: Angle Orthodontist
https://www.readbyqxmd.com/read/29107906/calcium-phosphate-scaling-during-wastewater-desalination-on-oligoamide-surfaces-mimicking-reverse-osmosis-and-nanofiltration-membranes
#7
Karthik Rathinam, Yoram Oren, Winfried Petry, Dietmar Schwahn, Roni Kasher
Desalinated domestic wastewater is an indispensable water resource in arid regions; however, its recovery can be limited by calcium phosphate scaling and fouling of the membrane. Here we investigated calcium phosphate mineralization on oligoamide surfaces that mimics reverse osmosis (RO) and nanofiltration (NF) membrane surfaces. We used a solution that simulates desalination of secondary treated domestic wastewater effluents for calcium phosphate mineralization experiments with oligoamide-coated gold surfaces...
October 27, 2017: Water Research
https://www.readbyqxmd.com/read/29105393/isolation-characterization-and-osteogenic-potential-of-mouse-digit-tip-blastema-cells-in-comparison-with-bone-marrow-derived-mesenchymal-stem-cells-in-vitro
#8
Leila Taghiyar, Samaneh Hosseini, Mahdi Hesaraki, Forough Azam Sayahpour, Nasser Aghdami, Mohamadreza Baghaban Eslaminejad
OBJECTIVES: Limb regeneration mediated by blastema cells (BlCs) in mammals is limited to the digit tips of neonates. Due to the lack of access to BlCs in adults and the difficulty in isolating and expanding BlCs from neonates, the use of a cellular population with similar features of BlCs would be a valuable strategy to direct a non-regenerative wound towards regeneration. In this study, we have initially isolated and cultured BlCs, and explored their characteristics in vitro. Next, we compared the capability of bone marrow-derived mesenchymal stem cells (BM-MSCs) as an alternative accessible cell source to BlCs for regeneration of appendages...
January 2018: Cell Journal
https://www.readbyqxmd.com/read/29093986/static-magnetic-fields-promote-osteoblastic-cementoblastic-differentiation-in-osteoblasts-cementoblasts-and-periodontal-ligament-cells
#9
Eun-Cheol Kim, Jaesuh Park, Il Keun Kwon, Suk-Won Lee, Su-Jung Park, Su-Jin Ahn
Purpose: Although static magnetic fields (SMFs) have been used in dental prostheses and osseointegrated implants, their biological effects on osteoblastic and cementoblastic differentiation in cells involved in periodontal regeneration remain unknown. This study was undertaken to investigate the effects of SMFs (15 mT) on the osteoblastic and cementoblastic differentiation of human osteoblasts, periodontal ligament cells (PDLCs), and cementoblasts, and to explore the possible mechanisms underlying these effects...
October 2017: Journal of Periodontal & Implant Science
https://www.readbyqxmd.com/read/29088987/effect-of-locally-administered-novel-biodegradable-chitosan-based-risedronate-zinc-hydroxyapatite-intra-pocket-dental-film-on-alveolar-bone-density-in-rat-model-of-periodontitis
#10
Deepak Kumar Khajuria, Saadath Fathima Zahra, Rema Razdan
The aim of this study was to develop a chitosan-based risedronate/zinc-hydroxyapatite intrapocket dental film (CRZHDF) for applications in the treatment of alveolar bone loss in an animal model of periodontitis. The physical characteristics (folding endurance, pH, mucoadhesive strength, risedronate content and release) of CRZHDF, exhibited results within the limit. X-ray diffraction analysis indicates reduced or disappeared crystallinity of risedronate and zinc-hydroxyapatite in presence of chitosan. Further, FTIR studies revealed stability of CRZHDF and compatibility between risedronate, zinc-hydroxyapatite and chitosan...
October 31, 2017: Journal of Biomaterials Science. Polymer Edition
https://www.readbyqxmd.com/read/29079596/erythropoietin-inhibits-osteoblast-function-in-myelodysplastic-syndromes-via-the-canonical-wnt-pathway
#11
Ekaterina Balaian, Manja Wobus, Heike Weidner, Ulrike Baschant, Maik Stiehler, Gerhard Ehninger, Martin Bornhäuser, Lorenz C Hofbauer, Martina Rauner, Uwe Platzbecker
The effects of erythropoietin on osteoblasts and bone formation are controversially discussed. Since patients with myelodysplastic syndromes often display excessively high erythropoietin level, we aimed to analyze the effect of erythropoietin on osteoblast function in myelodysplastic syndromes and define the role of Wnt signaling in this process. Expression of osteoblast-specific genes and subsequent osteoblasts mineralization was increased in mesenchymal stromal cells from healthy young donors by in vitro erythropoietin treatment...
October 27, 2017: Haematologica
https://www.readbyqxmd.com/read/29069393/sclerostin-antibody-reverses-bone-loss-by-increasing-bone-formation-and-decreasing-bone-resorption-in-a-rat-model-of-male-osteoporosis
#12
Xiaodong Li, Michael S Ominsky, Kelly S Villasenor, Qing-Tian Niu, Frank J Asuncion, Xuechun Xia, Mario Grisanti, Thomas J Wronski, W Scott Simonet, Hua Zhu Ke
Sclerostin antibody (Scl-Ab) restored bone mass and strength in the ovariectomized rat model of postmenopausal osteoporosis. Increased bone mineral density (BMD) and decreased skeletal fragility fracture risk have been reported in postmenopausal osteoporotic women receiving Scl-Ab. In males, loss of androgen leads to rapid decreases in BMD and increased risk for fragility fractures. We hypothesized that Scl-Ab could reverse the loss of bone mass and strength caused by androgen ablation in the orchiectomized (ORX) rat model of male osteoporosis...
October 20, 2017: Endocrinology
https://www.readbyqxmd.com/read/29069247/reversal-of-uremic-tumoral-calcinosis-by-optimization-of-clinical-treatment-of-bone-and-mineral-metabolism-disorder
#13
Mariana Espiga Maioli, Vinicius Daher Alvares Delfino, Amanda Carolina Damasceno Zanuto Guerra, Luiz Fernando Kunii, Raquel Ferreira Nassar Frange
Tumoral calcinosis is an uncommon type of extraosseous calcification characterized by large rubbery or cystic masses containing calcium-phosphate deposits. The condition prevails in the periarticular tissue with preservation of osteoarticular structures. Elevated calcium-phosphorus products and severe secondary hyperparathyroidism are present in most patients with uremic tumoral calcionosis (UTC). Case report of an obese secondary to chronic glomerulonephritis, undergoing continuous ambulatory peritoneal dialysis (CAPD) reported the appearance of painless tumors in the medial surface of fifth finger and left arm...
April 2017: Jornal Brasileiro de Nefrologia: ʹorgão Oficial de Sociedades Brasileira e Latino-Americana de Nefrologia
https://www.readbyqxmd.com/read/29067095/bio-oss-%C3%A2-modified-by-calcitonin-gene-related-peptide-promotes-osteogenesis-in-vitro
#14
Yuanjing Li, Lan Yang, Zhichao Zheng, Zhengmao Li, Tian Deng, Wen Ren, Caijuan Wu, Lvhua Guo
Bio-Oss(®) and α-calcitonin gene-related peptide (CGRP) are involved in osteogenesis. However, it has remained to be assessed how α-CGRP affects the effect of Bio-Oss. In the present study, primary osteoblasts were incubated with α-CGRP, Bio-Oss, α-GGRP-Bio-Oss or mimic-α-CGRP. The proliferation rate, mineralization nodules, alkaline phosphatase (ALP) activity and the expression of osteogenic genes were measured by a Cell Counting Kit-8 assay, Alizarin Red-S staining, ALP activity detection and reverse-transcription quantitative PCR as well as western blot analysis, respectively...
November 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29062364/alcohol-inhibits-odontogenic-differentiation-of-human-dental-pulp-cells-by-activating-mtor-signaling
#15
Wei Qin, Qi-Ting Huang, Michael D Weir, Zhi Song, Ashraf F Fouad, Zheng-Mei Lin, Liang Zhao, Hockin H K Xu
Long-term heavy alcohol consumption could result in a range of health, social, and behavioral problems. People who abuse alcohol are at high risks of seriously having osteopenia, periodontal disease, and compromised oral health. However, the role of ethanol (EtOH) in the biological functions of human dental pulp cells (DPCs) is unknown. Whether EtOH affects the odontoblastic differentiation of DPCs through the mechanistic target of rapamycin (mTOR) remains unexplored. The objective of this study was to investigate the effects of EtOH on DPC differentiation and mineralization...
2017: Stem Cells International
https://www.readbyqxmd.com/read/29056184/evidence-for-biofilm-acid-neutralization-by-baking-soda
#16
Domenick T Zero
BACKGROUND: The generating of acids from the microbial metabolism of dietary sugars and the subsequent decrease in biofilm pH below the pH at which tooth mineral begins to demineralize (critical pH) are the key elements of the dental caries process. Caries preventive strategies that rapidly neutralize biofilm acids can prevent demineralization and favor remineralization and may help prevent the development of sugar-induced dysbiosis that shifts the biofilm toward increased cariogenic potential...
November 2017: Journal of the American Dental Association
https://www.readbyqxmd.com/read/29055350/berberine-alleviates-oxidative-stress-in-rats-with-osteoporosis-through-receptor-activator-of-nuclear-factor-%C3%AE%C2%BA-b-receptor-activator-of-nuclear-factor-kappa-b-ligand-osteoprotegerin-rank-rankl-opg-pathway
#17
Xiao-Feng He, Long Zhang, Chun-Hua Zhang, Con-Ran Zhao, Heng Li, Ling-Fei Zhang, Guo-Feng Tian, Ming-Feng Guo, Zheng Dai, Fu-Ge Sui
Previous studies suggested that oxidative stress is related to the onset and development of osteoporosis. Moreover, it was demonstrated that berberine has a protective effect against oxidative stress-induced injuries. In this study, we aimed to investigate the effect and mechanism of action of berberine on rats with induced osteoporosis. Sixty 8-week-old female Wistar rats were randomly divided into the following 6 groups: control saline-treated, osteoporosis saline-treated, 3 osteoporosis berberine-treated groups (Ber 5, 10, and 20 mg/kg/body weight, respectively), and osteoporosis alendronate-treated (ALD) group...
October 22, 2017: Bosnian Journal of Basic Medical Sciences
https://www.readbyqxmd.com/read/29051709/effect-of-androgen-deprivation-therapy-on-bone-mineral-density-in-a-prostate-cancer-cohort-in-new-zealand-a-pilot-study
#18
Alice Wang, Nishi Karunasinghe, Lindsay Plank, Shuotun Zhu, Sue Osborne, Karen Bishop, Charis Brown, Tiffany Schwass, Jonathan Masters, Michael Holmes, Roger Huang, Christine Keven, Lynnette Ferguson, Ross Lawrenson
INTRODUCTION: Reduction in bone mineral density (BMD) is a common side effect of androgen deprivation therapy (ADT). We aimed to examine the cross-sectional and longitudinal variation in BMD and associated bone markers in patients with nonmetastatic prostate cancer (PCa) managed with and without ADT. METHODS: Bone mineral density of the total body, lumbar spine, femoral neck, ultradistal forearm, and one-third distal radius was measured in 88 patients with PCa without bone metastases at baseline and at 6 months...
2017: Clinical Medicine Insights. Oncology
https://www.readbyqxmd.com/read/29046415/skeletal-stiffening-in-an-amphibious-fish-out-of-water-is-a-response-to-increased-body-weight
#19
Andy J Turko, Dietmar Kültz, Douglas Fudge, Roger P Croll, Frank M Smith, Matthew R Stoyek, Patricia A Wright
Terrestrial animals must support their bodies against gravity, while aquatic animals are effectively weightless because of buoyant support from water. Given this evolutionary history of minimal gravitational loading of fishes in water, it has been hypothesized that weight-responsive musculoskeletal systems evolved during the tetrapod invasion of land and are thus absent in fishes. Amphibious fishes, however, experience increased effective weight when out of water - are these fishes responsive to gravitational loading? Contrary to the tetrapod-origin hypothesis, we found that terrestrial acclimation reversibly increased gill arch stiffness (∼60% increase) in the amphibious fish Kryptolebias marmoratus when loaded normally by gravity, but not under simulated microgravity...
October 15, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/29039615/effects-of-deferoxamine-on-the-osteogenic-differentiation-of-human-periodontal-ligament-cells
#20
Sen Mu, Shuanlong Guo, Xiang Wang, Yuanbo Zhan, Ying Li, Ying Jiang, Ruimin Zhang, Bin Zhang
Hypoxia regulates a number of cell biological processes, including cell survival, development and differentiation. Deferoxamine (DFO), an oral chelator for blood transfusion patients, has been demonstrated to induce hypoxia and is frequently used as a hypoxia‑mimicking agent. The purpose of the present study was to investigate the influence of DFO on the proliferation, migration and osteogenic differentiation of human periodontal ligament cells (hPDLCs). The effects of DFO on hPDLC viability and migration were measured using an MTT and wound healing assay...
December 2017: Molecular Medicine Reports
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