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Osteoporosis

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https://www.readbyqxmd.com/read/30222069/impact-of-occupational-cadmium-exposure-on-bone-in-sewage-workers
#1
Mona M Taha, Heba Mahdy-Abdallah, Eman M Shahy, Khadiga S Ibrahim, Safaa Elserougy
Cadmium (Cd) is one of the environmental risk factors for bone loss. The present study included 40 sewage workers occupationally exposed to Cd. Forty nonexposed men were included as a control group. Current smokers represented 65% and 47.5% of the exposed and control groups, respectively. The study aimed to investigate the hazard of occupational Cd exposure on bone health. This was achieved through measuring serum and urinary Cd, and calcium (Ca), in addition to serum osteoprotegerin (OPG) and estrogen receptor-α gene...
September 17, 2018: International Journal of Occupational and Environmental Health
https://www.readbyqxmd.com/read/30221714/epigallocatechin%C3%A2-3%C3%A2-gallate-protects-against-secondary-osteoporosis-in-a-mouse-model-via-the-wnt-%C3%AE-%C3%A2-catenin-signaling-pathway
#2
Jiancheng Xi, Qinggui Li, Xiaobo Luo, Jinlong Li, Lixin Guo, Haibin Xue, Guangsen Wu
Epigallocatechin‑3‑gallate (EGCG) is a polyphenolic compound extracted and isolated from green tea, which has a variety of important biological activities in vitro and in vivo, including anti‑tumor, anti‑oxidation, anti‑inflammation and lowering blood pressure. The aim of the present study was to investigate the protective effect of EGCG against secondary osteoporosis in a mouse model via the Wnt/β‑catenin signaling pathway. Reverse transcription‑quantitative polymerase chain reaction (RT‑qPCR) and western blotting were used to analyze runt‑related transcription factor 2 and osterix mRNA expression, and the protein expression of cyclin D1, Wnt and β‑catenin, and suppressed peroxisome proliferator‑activated receptor γ protein expression...
September 3, 2018: Molecular Medicine Reports
https://www.readbyqxmd.com/read/30221712/celastrol-inhibits-glucocorticoid%C3%A2-induced-osteoporosis-in-rat-via-the-pi3k-akt-and-wnt-signaling-pathways
#3
Jiancheng Xi, Qinggui Li, Xiaobo Luo, Yipeng Wang, Jinlong Li, Lixin Guo, Guangsen Wu
Modern pharmacological studies revealed that Celastrol exhibits anti‑inflammation, anti‑bacteria, anti‑virus, anti‑fertility, insect‑resistance functions and has been used for the treatment of rheumatism, rheumatoid arthritis, blood diseases, skin diseases and agricultural insecticide. The present study aimed to investigate the effects of Celastrol on glucocorticoid‑induced osteoporosis (GIOP) and the underlying molecular mechanisms. The findings of the current study revealed that Celastrol reduced body weight, urine calcium/creatinine, tartrate‑resistant acid phosphatase 5b, C‑terminal telopeptide of type I collagen, and induced osteocalcin in GIOP rats...
September 3, 2018: Molecular Medicine Reports
https://www.readbyqxmd.com/read/30219967/bone-morphogenetic-proteins-in-fracture-repair
#4
REVIEW
Ivo Dumic-Cule, Mihaela Peric, Lucija Kucko, Lovorka Grgurevic, Marko Pecina, Slobodan Vukicevic
Bone fractures represent a significant medical morbidity among aged population with osteoporosis. Bone morphogenetic proteins (BMPs) are suggested to have therapeutic potential to enhance fracture healing in such patients. Though BMP-mediated fracture healing has been well-documented in preclinical models, there has been no clinical study that demonstrated unequivocally that indeed a BMP when presented with an appropriate scaffold could provide basis for robust outcome for delayed or non-union diaphyseal bone fractures...
September 15, 2018: International Orthopaedics
https://www.readbyqxmd.com/read/30219513/transcriptome-analysis-reveals-functional-roles-of-nacreous-protein-n16-in-prednisolone-induced-osteoporotic-zebrafish
#5
Jia-Bi Lin, Hao Wu, Yu-Ling Liu, Pang-Chui Shaw, Pei-Bo Li
N16 is an active protein isolated and screened from nacre proteins. Our previous studies have shown that N16 exerted a good effect on osteoporosis caused by dexamethasone on female rats. In order to further confirm the action of N16 against glucocorticoid-induced osteoporosis (GIOP) and clarify its possible mechanisms, prednisolone-treated larval zebrafish (Danio rerio) model was adopted. Administration of N16 resulted in a significant increase of vertebral bone density of osteoporotic zebrafish, indicating a good effect of N16 against GIOP...
September 13, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/30219145/assessing-bone-quality-through-mechanical-properties-in-postmenopausal-trabecular-bone
#6
Manuel Toledano, Manuel Toledano-Osorio, Enrique Guerado, Enrique Caso, Estrella Osorio, Raquel Osorio
BACKGROUND: The inner structure of trabecular bone is a result of structural optimization provided by remodeling processes. Changes in hormonal status related to menopause cause bone tissue loss and micro-architectural deterioration with a consequent susceptibility to fracture. Accumulation of micro-damage in bone, as a function of the rate of production and rate of repair, underlies the development of stress fractures, increasing fragility associated to age and osteoporosis, especially in transmenopausal women...
September 2018: Injury
https://www.readbyqxmd.com/read/30218603/the-influence-of-thyroid-disorders-on-bone-density-and-biochemical-markers-of-bone-metabolism
#7
Konstantinos Tsevis, Eftihios Trakakis, Vasilios Pergialiotis, Eleni Alhazidou, Melpomeni Peppa, Charalampos Chrelias, Nikolaos Papantoniou, Periklis Panagopoulos
Background Thyroid dysfunction, predominantly hyperthyroidism, has been previously linked to impaired bone mass density (BMD) and increased risk of fractures. On the other hand, data in the field of hypothyroidism (HT) are missing. The purpose of the present study was to investigate the impact of thyroid disorders on bone density serum and urine calcium (Ca) and phosphate (P) as well as serum osteocalcin and alkaline phosphatase and urine hydroxyproline in a series of post-menopausal women. Materials and methods The study was conducted in the Reproductive Endocrinology Outpatient Clinic of our hospital...
September 15, 2018: Hormone Molecular Biology and Clinical Investigation
https://www.readbyqxmd.com/read/30218587/osteoanabolic-and-dual-action-drugs
#8
REVIEW
Gaia Tabacco, John P Bilezikian
Teriparatide (TPTD) and Abaloparatide (ABL) are the only osteoanabolic drugs available, at this time, for treatment of osteoporosis. TPTD is a 34-amino acid fragment that is identical in its primary sequence to the 34 amino acids of full-length human parathyroid hormone [hPTH(1-84)]. ABL is identical to parathyroid hormone related peptide (PTHrP) through the first 22 residues with significantly different amino acids inserted thereafter, between residues 22 and 34. The osteoanabolic actions of PTH are due directly to its effects on cells of the osteoblast lineage and indirectly by stimulating IGF-I synthesis and suppressing sclerostin and associated enhancement of Wnt signaling...
September 15, 2018: British Journal of Clinical Pharmacology
https://www.readbyqxmd.com/read/30218375/implementation-of-fed-batch-strategies-for-vitamin-k-menaquinone-7-production-by-bacillus-subtilis-natto-in-biofilm-reactors
#9
Ehsan Mahdinia, Ali Demirci, Aydin Berenjian
Recent studies show the essential health benefits associated with vitamin K, especially menaquinone-7 (MK-7). These benefits include reducing risks of cardiovascular diseases, osteoporosis, and even cancer. However, MK-7 production on an industrial level is only possible through bacterial fermentation and also current static fermentation strategies are not potent enough with difficulties to scale up. Biofilm reactors, however, may be a practical alternative. Biofilm reactors provide a controlled environment for the microorganisms to form mature and robust biofilms that enable them to produce value-added products with enhanced efficiencies...
September 14, 2018: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/30218208/aloin-promotes-osteogenesis-of-bone-marrow-derived-mesenchymal-stem-cells-via-the-erk1-2-dependent-runx2-signaling-pathway
#10
Peng Li, Junchao Kong, Zhuming Chen, Shuai Huang, Guihe Lv, Bo Wei, Jinsong Wei, Kaipeng Jing, Juanhua Quan, Jiaqi Chu
Osteoporosis is characterized by low bone mass and the degeneration of bone structure, conditions which increase the risk of fracture. Aloin has been shown to affect bone metabolism, but its role in osteogenic differentiation of bone marrow-derived mesenchymal stem cells (BMSCs) remains unclear. The aim of our study was to determine whether aloin promotes the proliferation and osteogenic differentiation of BMSCs and, if so, whether it acts via activation of the ERK1/2-Runx2 signaling pathway. We found that the different concentrations of aloin tested had no obvious cytotoxic effects on the viability of BMSCs...
September 14, 2018: Journal of Natural Medicines
https://www.readbyqxmd.com/read/30217737/pictures-in-health-information-and-their-pitfalls-focus-group-study-and-systematic-review
#11
Julia Lühnen, Anke Steckelberg, Susanne Buhse
BACKGROUND: Health information often includes different categories of pictures. This study comprises: A) exploration of the perception of photos presented in a brochure on the prevention of osteoporosis and B) a systematic review on the effects of pictures in health information. METHODS: A) We conducted four focus groups. Participants with heterogeneous cultural and educational background were included. The interviews were subjected to qualitative content analysis...
September 11, 2018: Zeitschrift Für Evidenz, Fortbildung und Qualität Im Gesundheitswesen
https://www.readbyqxmd.com/read/30217450/activation-of-jnk-signaling-in-osteoblasts-is-inversely-correlated-with-collagen-synthesis-in-age-related-osteoporosis
#12
Xin Zhang, Gang Zhao, Ya Zhang, Jian Wang, Yapeng Wang, Long Cheng, Minxuan Sun, Yongjun Rui
The age-related reduction in the function of osteoblasts plays a central role in the pathogenesis of bone loss and osteoporosis. Collagen synthesis is a primary function of differentiated osteoblasts, however, the mechanisms for age-related changes in collagen synthesis in human osteoblasts remain elusive. We use Gene Ontology (GO) analysis and Gene Set Enrichment Analysis (GSEA) analysis to exploit the transcriptional profiles of osteoblasts from young and old donors. A panel of collagen members was downregulated in aged osteoblasts, including COL12A1, COL5A1, COL5A3, COL8A1 and COL8A2...
September 11, 2018: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/30217118/efficacy-of-4-year-denosumab-treatment-alone-or-in-combination-with-teriparatide-in-japanese-postmenopausal-osteoporotic-women
#13
Takako Suzuki, Yukio Nakamura, Hiroyuki Kato
Purpose/Introduction: This extended randomized prospective study aimed to compare the 4-year clinical outcomes of denosumab treatment alone or in combination with teriparatide in treatment-naïve postmenopausal Japanese patients with osteoporosis. METHODS: Between July 2013 and December 2016, 30 eligible women from our previous study were enrolled. After newly adding 17 randomly assigned patients, 47 patients were classified into the denosumab alone group (denosumab group, n = 22) or denosumab plus teriparatide group (combination group, n = 25)...
September 14, 2018: Modern Rheumatology
https://www.readbyqxmd.com/read/30217029/the-beneficial-effect-of-proanthocyanidins-and-icariin-on-biochemical-markers-of-bone-turnover-in-rats
#14
Nada Oršolić, Johann Nemrava, Željko Jeleč, Marina Kukolj, Dyana Odeh, Svjetlana Terzić, Rajko Fureš, Tomica Bagatin, Dinko Bagatin
Nutrition is an important factor that influences bone metabolism, the endocrine and/or paracrine system, and bone-active mineral elements homeostasis. We studied antiosteoporotic effects of grape seed proanthocyanidins extract, icariin or alendronate (ALN) in retinoic acid-induced (13cRA) bone loss in rats. Proanthocyanidins and icariin have beneficial effects on bone health; they have improved the bone weight reduction, the length and the diameter of the bone, calcium, and phosphorus content in bone ash, bone mineral density (BMD), the biochemical markers of bone turnover and uterus atrophy induced by 13cRA...
September 13, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/30217005/sanggenon-c-stimulates-osteoblastic-proliferation-and-differentiation-inhibits-osteoclastic-resorption-and-ameliorates-prednisone-induced-osteoporosis-in-zebrafish-model
#15
Huijuan Wang, Tingting Feng, Donggui Guo, Min Zhang, Lin Chen, Ying Zhou
Sanggenon C (SC), which is a natural flavonoid found in the stem bark of Cortex Mori, has been discovered to have the antioxidant, anti-inflammatory, and antitumor properties. However, its effect in osteoporosis has not yet been reported. In this research, the effect of SC on the proliferation of MC3T3-E1 cells was evaluated by using the MTT assay. Alkaline phosphatase (ALP) activity and the mRNA expression of Runx2 , Collagen I , OPG , and RANKL were examined. TRAP-positive cell counting and bone resorption pits were adopted to observe the effect of SC on the formation and function of osteoclasts...
September 13, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/30216851/novel-bisphosphonates-with-antiresorptive-effect-in-bone-mineralization-and-osteoclastogenesis
#16
Salvatore Savino, Annamaria Toscano, Rosa Purgatorio, Emanuela Profilo, Antonio Laghezza, Paolo Tortorella, Mariacristina Angelelli, Saverio Cellamarea, Rosa Scala, Domenico Tricarico, Carlo Marya Thomas Marobbio, Filippo Perna, Paola Vitale, Mariangela Agamennone, Vincenzo Dimiccoli, Anna Tolomeo, Antonio Scilimati
Bisphosphonates such as zoledronic, alendronic and risedronic acids are a class of drugs clinically used to prevent bone density loss and osteoporosis. Novel P-C-P bisphosphonates were synthesized for targeting human farnesyl pyrophosphate synthase (hFPPS) and human geranylgeranyl pyrophosphate synthase (hGGPPS), key enzymes of the mevalonate pathway, and capable of anti-proliferative action on a number of cell lines (PC3, MG63, MC3T3, RAW 264.7, J774A.1, bone marrow cells and their co-colture with PC3) involved in bone homeostasis, bone formation and death...
August 18, 2018: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/30216504/autophagy-in-osteoporosis-relation-to-oxidative-stress
#17
Sara Ezzat, Manal L Louka, Zeiad M Zakaria, Magda M Nagaty, Radwan G Metwaly
Impaired autophagy and oxidative stress are implicated in the development of many diseases. This study aimed to investigate the involvement of autophagy represented by autophagy-related gene 7 (Atg7) and oxidative stress represented by superoxide dismutase 2 (SOD2) gene expression and enzyme activity in the pathogenesis of osteoporosis. Atg7 and SOD2 gene relative expression were evaluated by SYBR green quantitative real-time-polymerase chain reaction in the osteoporotic group (n = 26) versus the osteoporosis free group (n = 14)...
September 14, 2018: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/30216110/skullcapflavone-ii-inhibits-osteoclastogenesis-by-regulating-reactive-oxygen-species-and-attenuates-the-survival-and-resorption-function-of-osteoclasts-by-modulating-integrin-signaling
#18
Jiae Lee, Han Saem Son, Hye In Lee, Gong-Rak Lee, You-Jin Jo, Seong-Eun Hong, Narae Kim, Minjeong Kwon, Nam Young Kim, Hyun Jin Kim, Yoo Jin Lee, Eun Kyoung Seo, Woojin Jeong
Many bone diseases, such as osteoporosis and rheumatoid arthritis, are attributed to an increase in osteoclast number or activity; therefore, control of osteoclasts has significant clinical implications. This study shows how skullcapflavone II (SFII), a flavonoid with anti-inflammatory activity, regulates osteoclast differentiation, survival, and function. SFII inhibited osteoclastogenesis with decreased activation of MAPKs, Src, and cAMP response element-binding protein (CREB), which have been known to be redox sensitive...
September 14, 2018: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/30215534/the-autophagy-receptor-sqstm1-p62-mediates-anti-inflammatory-actions-of-the-selective-nr3c1-glucocorticoid-receptor-modulator-compound-a-cpda-in-macrophages
#19
Viacheslav Mylka, Julie Deckers, Dariusz Ratman, Lode De Cauwer, Jonathan Thommis, Riet De Rycke, Francis Impens, Claude Libert, Jan Tavernier, Wim Vanden Berghe, Kris Gevaert, Karolien De Bosscher
Glucocorticoids are widely used to treat inflammatory disorders; however, prolonged use of glucocorticoids results in side effects including osteoporosis, diabetes and obesity. Compound A (CpdA), identified as a selective NR3C1/glucocorticoid receptor (nuclear receptor subfamily 3, group C, member 1) modulator, exhibits an inflammation-suppressive effect, largely in the absence of detrimental side effects. To understand the mechanistic differences between the classic glucocorticoid dexamethasone (DEX) and CpdA, we looked for proteins oppositely regulated in bone marrow-derived macrophages using an unbiased proteomics approach...
September 14, 2018: Autophagy
https://www.readbyqxmd.com/read/30214270/prevalence-of-pain-related-diagnoses-in-patients-with-dementia-a-nationwide-study
#20
Pei-Chao Lin, Chien-Hsun Li, Pi-Ling Chou, Yao-Mei Chen, Li-Chan Lin
Purposes: To investigate the prevalence of pain-related diagnoses in patients with dementia and evaluate the association of pain-related diagnoses with demographic characteristics and dementia subtypes. Patients and methods: In this population-based retrospective cohort study, participants were recruited from a cohort of 2 million people randomly sampled from the general population in the National Health Insurance Research Database of Taiwan from 2000 to 2013. The index year was defined as the period of 1 year from the date of the first diagnosis of dementia...
2018: Journal of Pain Research
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