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Osteoprotegerin

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https://www.readbyqxmd.com/read/28092862/protective-effects-of-total-flavonoids-of-astragalus-against-adjuvant-induced-arthritis-in-rats-by-regulating-opg-rankl-nf-%C3%AE%C2%BAb-pathway
#1
Xin-Yu Liu, Lu Xu, Ying Wang, Jin-Xia Li, Yu Zhang, Chong Zhang, Sha-Sha Wang, Xue-Mei Zhang
BACKGROUND: Astragalus membranaceus Bunge is one of the oldest and most frequently used crude herbs in traditional Chinese medicine. The total flavonoids of Astragalus (TFA) are the main active components isolated from Astragalus membranaceus Bunge. Our recent study has shown its potential immunomodulatory and anti-inflammatory effects in vivo and in vitro. However, its anti-arthritic effects and mechanisms of action involved have not been elucidated. The aim of this study was to evaluate the protective effects and possible mechanisms of TFA on Freund's complete adjuvant (FCA)-induced arthritis in rats...
January 13, 2017: International Immunopharmacology
https://www.readbyqxmd.com/read/28091892/bariatric-roux-en-y-gastric-bypass-surgery-adipocyte-proteins-involved-in-increased-bone-remodeling-in-humans
#2
Maria Fernanda G Biagioni, Adriana L Mendes, Célia Regina Nogueira, Celso V Leite, Loraine Gollino, Gláucia Mfs Mazeto
PURPOSE: Bariatric surgery has been associated with bone remodeling changes. The action of adipokines on the expression of receptor activator of nuclear factor kappa β ligand (RANKL) and osteoprotegerin (OPG) and on an increase in sclerostin could be related to these changes. MATERIALS AND METHODS: This study aimed to assess the repercussions of weight loss, fat mass (FM), and fat-free mass (FFM) loss and biochemical and hormonal changes on bone remodeling markers after Roux-en-Y gastric bypass (RYGB)...
January 13, 2017: Obesity Surgery
https://www.readbyqxmd.com/read/28088671/melatonin-attenuates-titanium-particle-induced-osteolysis-via-activation-of-wnt-%C3%AE-catenin-signaling-pathway
#3
Zichuan Ping, Xuanyang Hu, Liangliang Wang, Jiawei Shi, Yunxia Tao, Xiexing Wu, Zhenyang Hou, Xiaobin Guo, Wen Zhang, Huilin Yang, Yaozeng Xu, Zhirong Wang, Dechun Geng
: Wear debris-induced inhibition of bone regeneration and extensive bone resorption were common features in peri-prosthetic osteolysis (PPO). Here, we investigated the effect of melatonin on titanium particle-stimulated osteolysis in a murine calvariae model and mouse-mesenchymal-stem cells (mMSCs) culture system. Melatonin inhibited titanium particle-induced osteolysis and increased bone formation at osteolytic sites, confirmed by radiological and histomorphometric data. Furthermore, osteoclast numbers decreased dramatically in the low- and high-melatonin administration mice, as respectively, compared with the untreated animals...
January 11, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28079506/response-of-human-rheumatoid-arthritis-osteoblasts-and-osteoclasts-to-adiponectin
#4
Grit Krumbholz, Susann Junker, Florian M P Meier, Markus Rickert, Jürgen Steinmeyer, Stefan Rehart, Uwe Lange, Klaus W Frommer, Georg Schett, Ulf Müller-Ladner, Elena Neumann
OBJECTIVES: Adiponectin is an effector molecule in the pathophysiology of rheumatoid arthritis, e.g. by inducing cytokines and matrix degrading enzymes in synovial fibroblasts. There is growing evidence that adiponectin affects osteoblasts and osteoclasts although the contribution to the aberrant bone metabolism in rheumatoid arthritis is unclear. Therefore, the adiponectin effects on rheumatoid arthritis-derived osteoblasts and osteoclasts were evaluated. METHODS: Adiponectin and its receptors were examined in bone tissue...
January 5, 2017: Clinical and Experimental Rheumatology
https://www.readbyqxmd.com/read/28078844/a-natural-formula-containing-lactoferrin-equisetum-arvensis-soy-isoflavones-and-vitamin-d3-modulates-bone-remodeling-and-inflammatory-markers-in-young-and-aged-rats
#5
L Menghini, C Ferrante, L Leporini, L Recinella, A Chiavaroli, S Leone, G Pintore, M Vacca, G Orlando, L Brunetti
A pivotal role in osteoporosis development is played by radical oxygen species (ROS), the increased production of which is related to inhibited osteoblastic activity and bone formation. A new field of research could involve medicinal plants with antioxidant and protective effects in osteoporosis. Furthermore, considering the multifactorial metabolic aspects of osteoporosis, the pharmacological association of multiple medicinal plants could improve patient response. The aim of the present study is to evaluate in vitro and in vivo the protective effects of a natural formula containing lactoferrin 12%, Equisetum arvensis ES 54%, soy isoflavones 34% and vitamin D3 0...
October 2016: Journal of Biological Regulators and Homeostatic Agents
https://www.readbyqxmd.com/read/28077433/osteoprotegerin-disruption-attenuates-hysu-induced-pulmonary-hypertension-through-integrin-%C3%AE-v%C3%AE-3-fak-akt-pathway-suppression
#6
Daile Jia, Qian Zhu, Huan Liu, Caojian Zuo, Yuhu He, Guilin Chen, Ankang Lu
BACKGROUND: Pulmonary arterial remodeling characterized by increased vascular smooth muscle proliferation is commonly seen in life-threatening disease, pulmonary arterial hypertension (PAH). Clinical studies have suggested a correlation between osteoprotegerin serum levels and PAH severity. Here, we aimed to invhestigate vascular osteoprotegerin expression and its effects on pulmonary arterial smooth muscle cell proliferation in vitro and in vivo, as well as examine the signal transduction pathways mediating its activity...
February 2017: Circulation. Cardiovascular Genetics
https://www.readbyqxmd.com/read/28062506/wnt-signaling-pathway-inhibitor-sclerostin-inhibits-angiotensin-ii-induced-aortic-aneurysm-and-atherosclerosis
#7
Smriti Murali Krishna, Sai-Wang Seto, Roby J Jose, Jiaze Li, Susan K Morton, Erik Biros, Yutang Wang, Vianne Nsengiyumva, Jan H N Lindeman, Gabriela G Loots, Catherine M Rush, Jeffrey M Craig, Jonathan Golledge
OBJECTIVE: Sclerostin (SOST) has been identified as an important regulator of bone formation; however, it has not been previously implicated in arterial disease. The aim of this study was to assess the role of SOST in aortic aneurysm (AA) and atherosclerosis using human samples, a mouse model, and in vitro investigations. APPROACH AND RESULTS: SOST protein was downregulated in human and mouse AA samples compared with controls. Transgenic introduction of human SOST in apolipoprotein E-deficient (ApoE(-/-)) mice (SOST(Tg)...
December 22, 2016: Arteriosclerosis, Thrombosis, and Vascular Biology
https://www.readbyqxmd.com/read/28057161/-the-study-on-the-inhibitive-effects-of-recombinant-parathyroid-hormone-1-34-on-osteolysis-in-a-murine-calvarial-model-induced-by-wear-particles
#8
Y B Yu, R X He
Objective: To investigate the effect of different doses of recombinant parathyroid hormone (PTH) (1-34) on osteolysis in a murine calvarial model. Methods: In total, 48 adult male C57BL/J6 mice were randomly divided into four groups: the sham group, the vehicle group, the low dose-, and high dose PTH group (n=12 each group). Mice in the PTH groups were treated with local injection of recombinant PTH at 30 or 60 μg·kg(-1)·d(-1,) intermittent injection 3 times per week for two weeks. Mice in the sham and vehicle groups received local injection of saline daily...
December 27, 2016: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/28056805/endurance-training-significantly-increases-serum-endocan-but-not-osteoprotegerin-levels-a-prospective-observational-study
#9
Michael Sponder, Ioana-Alexandra Campean, Michael Emich, Monika Fritzer-Szekeres, Brigitte Litschauer, Jutta Bergler-Klein, Senta Graf, Jeanette Strametz-Juranek
BACKGROUND: Endocan (EN) was suggested a potential inflammatory and cardiovascular disease (CVD) marker which might also be involved in renal failure and/or renal failure-associated vascular events. It is not clear whether osteoprotegerin (OPG) is a pro- or anti-atherogenic factor, however, it is agreed upon that OPG is elevated in subjects with increased calcification status. The aim of the study was to investigate the influence of long-term physical activity on serum endocan (EN) and osteoprotegerin-levels...
January 5, 2017: BMC Cardiovascular Disorders
https://www.readbyqxmd.com/read/28049653/mechanisms-in-endocrinology-diabetes-mellitus-a-state-of-low-bone-turnover-a-systematic-review-and-meta-analysis
#10
REVIEW
Katrine Hygum, Jakob Starup-Linde, Torben Harsløf, Peter Vestergaard, Bente L Langdahl
OBJECTIVE: To investigate the differences in bone turnover between diabetic patients and controls. DESIGN: A systematic review and meta-analysis. METHODS: A literature search was conducted using the databases Medline at PubMed and EMBASE. The free text search terms 'diabetes mellitus' and 'bone turnover', 'sclerostin', 'RANKL', 'osteoprotegerin', 'tartrate-resistant acid' and 'TRAP' were used. Studies were eligible if they investigated bone turnover markers in patients with diabetes compared with controls...
March 2017: European Journal of Endocrinology
https://www.readbyqxmd.com/read/28041995/osteoprotegerin-and-%C3%AE-2-agonists-mitigate-muscular-dystrophy-in-slow-and-fast-twitch-skeletal-muscles
#11
Sébastien S Dufresne, Antoine Boulanger-Piette, Jérôme Frenette
Our recent work showed that daily injections of osteoprotegerin (OPG)-immunoglobulin fragment complex (OPG-Fc) completely restore the function of fast-twitch extensor digitorum longus muscles in dystrophic mdx mice, a murine model of Duchenne muscular dystrophy. However, despite marked improvements, OPG-Fc was not as effective in preventing the loss of function of slow-twitch soleus and diaphragm muscles. Because β2-agonists enhance the function of slow- and fast-twitch dystrophic muscles and because their use is limited by their adverse effects on bone and cardiac tissues, we hypothesized that OPG-Fc, a bone and skeletal muscle protector, acts synergistically with β2-agonists and potentiates their positive effects on skeletal muscles...
December 30, 2016: American Journal of Pathology
https://www.readbyqxmd.com/read/28035998/tgf-%C3%AE-and-physiological-root-resorption-of-deciduous-teeth
#12
Emi Shimazaki, Takeo Karakida, Ryuji Yamamoto, Saeko Kobayashi, Makoto Fukae, Yasuo Yamakoshi, Yoshinobu Asada
The present study was performed to examine how transforming growth factor β (TGF-β) in root-surrounding tissues on deciduous teeth regulates the differentiation induction into odontoclasts during physiological root resorption. We prepared root-surrounding tissues with (R) or without (N) physiological root resorption scraped off at three regions (R1-R3 or N1-N3) from the cervical area to the apical area of the tooth and measured both TGF-β and the tartrate-resistant acid phosphatase (TRAP) activities. The TGF-β activity level was increased in N1-N3, whereas the TRAP activity was increased in R2 and R3...
December 27, 2016: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28030842/loss-of-runx3-expression-inhibits-bone-invasion-of-oral-squamous-cell-carcinoma
#13
Junhee Park, Hyun-Jeong Kim, Ki Rim Kim, Sun Kyoung Lee, Hyungkeun Kim, Kwang-Kyun Park, Won-Yoon Chung
High recurrence and lower survival rates in patients with oral squamous cell carcinoma (OSCC) are associated with its bone invasion. We identified the oncogenic role of RUNX3 during bone invasion by OSCC. Tumor growth and the generation of osteolytic lesions were significantly inhibited in mice that were subcutaneously inoculated with RUNX3-knockdown human OSCC cells. RUNX3 knockdown enhanced TGF-β-induced growth arrest and inhibited OSCC cell migration and invasion in the absence or presence of transforming growth factor-β (TGF-β), a major growth factor abundant in the bone microenvironment...
December 21, 2016: Oncotarget
https://www.readbyqxmd.com/read/28028419/the-effect-of-orthognathic-surgery-on-osteoprotegerin-as-immunological-caliper-of-bone-healing
#14
Sara Soliman, Mamdouh Ahmed
BACKGROUND: Osteoprotegerin (OPG) is considered to be the cytokine that plays an important role in the healing process. OPG regulates bone cell biology, osteoblast-osteoclast, bone-immune cross-talk and maintenance of bone mass. It plays an important role in the development, induction, and repair of bone. Orthognathic surgery as multiples segmental osteotomies has been taken as a model surgery to assess the changes in osteoprotegerin levels in the post-operative bone healing period. AIM: The aim of the study was to evaluate OPG as immunological caliper of bone healing...
December 15, 2016: Open Access Macedonian Journal of Medical Sciences
https://www.readbyqxmd.com/read/28025385/prognostic-value-of-bone-and-vascular-derived-molecular-biomarkers-in-hemodialysis-and-renal-transplant-patients-a-systematic-review-and-meta-analysis
#15
Gernot Pichler, Maria C Haller, Alexander Kainz, Myles Wolf, Josep Redon, Rainer Oberbauer
BACKGROUND: Patients undergoing hemodialysis and kidney graft recipients are high-risk populations for cardiovascular and all-cause mortality. Fibroblast growth factor 23 (FGF23), osteoprotegerin (OPG), RANK ligand, osteopontin (OPN), Klotho protein and bone morphogenetic protein-7 (BMP-7) are bone- and vascular-derived molecular biomarkers that have been shown to be associated with cardiovascular surrogate end points; however, currently available data on the prognostic value of these biomarkers is inconsistent...
December 26, 2016: Nephrology, Dialysis, Transplantation
https://www.readbyqxmd.com/read/28013554/the-emerging-roles-of-b-cells-as-partners-and-targets-in-periodontitis
#16
Moncef Zouali
Initial studies of periodontal disease suggested that T cell-mediated immunity against oral Gram-negative microorganisms is a key player in the pathogenesis of this inflammatory disease. Recent investigations, however, revealed that B cells are also engaged. Given their chief role in innate-like and adaptive immune responses, B cells could exert protective functions in periodontitis. However, the periodontal bacteria-specific antibody response is generally unable to halt disease progression in affected subjects, suggesting that the antibodies produced could exhibit low anti-bacterial blocking functions or opsonophagocytic potential, and/or unfavorable effects...
December 26, 2016: Autoimmunity
https://www.readbyqxmd.com/read/28011809/safety-and-efficacy-of-tocotrienol-supplementation-for-bone-health-in-postmenopausal-women-protocol-for-a-dose-response-double-blinded-placebo-controlled-randomised-trial
#17
Chwan-Li Shen, Huanbiao Mo, Shengping Yang, Shu Wang, Carol K Felton, Michael D Tomison, Ima Nirwana Soelaiman
INTRODUCTION: Osteoporosis is a major health concern in postmenopausal women, and oxidative stress contributes to the development of bone loss. Cellular studies and ovariectomised rat model mimicking bone loss in postmenopausal women show the bone-protective effect of tocotrienols (TTs) with antioxidant capability. We aim to access the safety and efficacy of TT consumption for bone health in postmenopausal women. METHODS AND ANALYSIS: In this 12-week randomised double-blinded placebo-controlled trial for the effects of dietary TT supplementation in postmenopausal women, postmenopausal women aged 45 years and older with at least 1 year after menopause and bone mineral density T-score at the spine and/or hip 2...
December 23, 2016: BMJ Open
https://www.readbyqxmd.com/read/28005569/updates-on-the-role-of-receptor-activator-of-nuclear-factor-%C3%AE%C2%BAb-receptor-activator-of-nuclear-factor-%C3%AE%C2%BAb-ligand-osteoprotegerin-pathway-in-breast-cancer-risk-and-treatment
#18
Christian M Bayer, Matthias W Beckmann, Peter A Fasching
PURPOSE OF REVIEW: Treatment with bisphosphonates and denosumab is the standard of care in bone metastatic disease. In addition, the adjuvant therapy of denosumab or bisphosphonates is very effective to prevent loss of bone mineral density, for example in osteoporosis. However, it is still unclear if this therapy has an influence on preventing cancer. RECENT FINDINGS: Since the identification of novel genes in the 1980s, it took about 30 years until denosumab, as a fully human mAb against receptor activator of nuclear factor (NF)-κB ligand (RANKL), could be introduced to clinical practice...
December 21, 2016: Current Opinion in Obstetrics & Gynecology
https://www.readbyqxmd.com/read/28004300/effect-of-wenhua-juanbi-recipe-on-expression-of-receptor-activator-of-nuclear-factor-kappa-b-ligand-osteoprotegerin-and-tumor-necrosis-factor-receptor-superfamily-member-14-in-rats-with-collagen-induced-arthritis
#19
Xi-de Liu, Yun-Qing Wang, Long Cai, Li-Hong Ye, Fang Wang, Ying-Ying Feng
OBJECTIVE: To study the effect of Wenhua Juanbi Recipe (, WJR) on expression of receptor activator of nuclear factor kappa-B ligand (RANKL), osteoprotegerin (OPG), and tumor necrosis factor receptor superfamily member 14 (TNFRSF14, also known as LIGHT) in rats with collagen-induced arthritis (CIA). METHODS: CIA rats were generated by subcutaneous injection of bovine collagen type-II at the tail base. Sixty CIA rats were randomly assigned (10 animals/group) to: model, methotrexate (MTX)-treated (0...
December 21, 2016: Chinese Journal of Integrative Medicine
https://www.readbyqxmd.com/read/28002811/aberrant-regulation-of-rankl-opg-in-women-at-high-risk-of-developing-breast-cancer
#20
Stefan Kiechl, Daniel Schramek, Martin Widschwendter, Evangelia-Ourania Fourkala, Alexey Zaikin, Allison Jones, Bernadette Jaeger, Brigitte Rack, Wolfgang Janni, Christoph Scholz, Johann Willeit, Siegfried Weger, Agnes Mayr, Andrew Teschendorff, Adam Rosenthal, Lindsay Fraser, Susan Philpott, Louis Dubeau, Mohammed Keshtgar, Rebecca Roylance, Ian J Jacobs, Usha Menon, Georg Schett, Josef M Penninger
Breast cancer is the most common female cancer, affecting approximately one in eight women during their lifetime in North America and Europe. Receptor Activator of NF-kB Ligand (RANKL), its receptor RANK and the natural antagonist osteoprotegerin (OPG) are essential regulators of bone resorption. We have initially shown that RANKL/RANK are essential for hormone-driven mammary epithelial proliferation in pregnancy and RANKL/RANK have been implicated in mammary stem cell biology. Using genetic mouse-models, we and others identified the RANKL/RANK system as a key regulator of sex hormone, BRCA1-mutation, and oncogene-driven breast cancer and we proposed that RANKL/RANK might be involved in the initiation of breast tumors...
December 18, 2016: Oncotarget
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