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https://www.readbyqxmd.com/read/27933339/efficacy-and-safety-of-osteoporosis-medications-in-a-rat-model-of-late-stage-chronic-kidney-disease-accompanied-by-secondary-hyperparathyroidism-and-hyperphosphatemia
#1
M Ota, M Takahata, T Shimizu, Y Kanehira, H Kimura-Suda, Y Kameda, H Hamano, S Hiratsuka, D Sato, N Iwasaki
: This study showed that bisphosphonate was safe and effective for the treatment of bone disorders in stage 4 chronic kidney disease (CKD) rats. Intermittent teriparatide therapy showed an anabolic action on bone even under secondary hyperparathyroidism conditions without having an adverse effect on mineral metabolism in late-stage CKD. INTRODUCTION: Patients with late-stage CKD are at high risk for fragility fractures. However, there are no consensus on the efficacy and safety of osteoporosis medications for patients with late-stage CKD...
December 8, 2016: Osteoporosis International
https://www.readbyqxmd.com/read/27933189/insulin-resistance-of-protein-anabolism-accompanies-that-of-glucose-metabolism-in-lean-glucose-tolerant-offspring-of-persons-with-type-2-diabetes
#2
Sergio A Burgos, Vikram Chandurkar, Michael A Tsoukas, Stéphanie Chevalier, José A Morais, Marie Lamarche, Errol B Marliss
OBJECTIVE: To test whether protein anabolic resistance is an early defect in type 2 diabetes (T2D). RESEARCH DESIGN AND METHODS: Seven lean, normoglycemic T2D offspring (T2D-O) and eight matched participants without family history (controls; C) underwent a 3-hour hyperinsulinemic (40 mU/m(2)/min), euglycemic (5.5 mmol/L) and isoaminoacidemic clamp. Whole-body glucose and protein kinetics were measured with d-[3-(3)H]glucose and l-[l-(13)C]leucine, respectively...
2016: BMJ Open Diabetes Research & Care
https://www.readbyqxmd.com/read/27930873/preprogrammed-long-term-systemic-pulsatile-delivery-of-parathyroid-hormone-to-strengthen-bone
#3
Ming Dang, Amy J Koh, Theodora Danciu, Laurie K McCauley, Peter X Ma
Parathyroid hormone (PTH) is the only US Food and Drug Administration (FDA)-approved anabolic agent for the treatment of osteoporosis. The anabolic action of PTH depends on the mode of PTH administration. Pulsatile administration promotes bone formation, however continuous PTH exposure results in bone resorption. In addition, the therapeutic effect of PTH is optimal when the dose and duration fit the therapeutic window. Current PTH treatment requires daily injection, which is neither a convenient nor a favorable choice of patients...
December 8, 2016: Advanced Healthcare Materials
https://www.readbyqxmd.com/read/27930760/body-image-disorders-and-abuse-of-anabolic-androgenic-steroids-among-men
#4
Harrison G Pope, Jag H Khalsa, Shalender Bhasin
No abstract text is available yet for this article.
December 8, 2016: JAMA: the Journal of the American Medical Association
https://www.readbyqxmd.com/read/27930536/the-effect-of-sequential-therapy-for-postmenopausal-women-with-osteoporosis-a-prisma-compliant-meta-analysis-of-randomized-controlled-trials
#5
Shenghan Lou, Houchen Lv, Guoqi Wang, Zhirui Li, Ming Li, Licheng Zhang, Peifu Tang
BACKGROUND: Osteoporosis, more likely to occur in postmenopausal women, is a chronic condition that usually requires a long-term treatment strategy, but the use of either antiresorptive or anabolic drugs should be limited to 18 to 24 months. Discontinuing antiosteoporosis drugs may result in rapidly declining bone mineral density (BMD). Therefore, many patients are treated with the sequential use of 2 or more drugs. However, whether switching treatment from anabolic to antiresorptive drugs or the reverse could maintain or further increase BMD; and whether the sequential therapy could outperform the monotherapy under the same treatment duration still remains unclear...
December 2016: Medicine (Baltimore)
https://www.readbyqxmd.com/read/27929434/nutraceutical-supplements-in-the-management-and-prevention-of-osteoarthritis
#6
REVIEW
Paola Castrogiovanni, Francesca Maria Trovato, Carla Loreto, Houda Nsir, Marta Anna Szychlinska, Giuseppe Musumeci
Nutraceuticals are dietary compounds which have a role in the balance of anabolic and catabolic signals in joints. Their regulatory function on homeostasis of cartilage metabolism nutraceuticals is increasingly considered for the management and, above all, the prevention of osteoarthritis (OA). OA is a degenerative disease characterized by cartilage and synovium inflammation that can cause joint stiffness, swelling, pain, and loss of mobility. It is a multifactorial disease and, due to the great percentage of people suffering from it and the general increase in life expectancy, OA is considered as one of the most significant causes of disability in the world...
December 6, 2016: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/27929032/ecdysteroid-containing-food-supplements-from-cyanotis-arachnoidea-on-the-european-market-evidence-for-spinach-product-counterfeiting
#7
Attila Hunyadi, Ibolya Herke, Katalin Lengyel, Mária Báthori, Zoltán Kele, András Simon, Gábor Tóth, Kálmán Szendrei
Phytoecdysteroids like 20-hydroxyecdysone ("ecdysterone") can exert a mild, non-hormonal anabolic/adaptogenic activity in mammals, and as such, are frequently used in food supplements. Spinach is well-known for its relatively low ecdysteroid content. Cyanotis arachnoidea, a plant native in China, is among the richest sources of phytoecdysteroids, and extracts of this plant are marketed in tons per year amounts via the internet at highly competitive prices. Here we report the investigation of a series of food supplements produced in Germany and claimed to contain spinach extracts...
December 8, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27927764/circulating-microrna-are-predictive-of-aging-and-acute-adaptive-response-to-resistance-exercise-in-men
#8
Lee M Margolis, Sarah J Lessard, Yassine Ezzyat, Roger A Fielding, Donato A Rivas
Circulating microRNA (c-miRNA) have the potential to function as novel noninvasive markers of the underlying physiological state of skeletal muscle. This investigation sought to determine the influence of aging on c-miRNA expression at rest and following resistance exercise in male volunteers (Young: n = 9; Older: n = 9). Primary findings were that fasting c-miRNA expression profiles were significantly predictive of aging, with miR-19b-3p, miR-206, and miR-486 distinguishing between age groups. Following resistance exercise, principal component analysis revealed a divergent response in expression of 10 c-miRNA, where expression profiles were upregulated in younger and downregulated in older participants...
December 7, 2016: Journals of Gerontology. Series A, Biological Sciences and Medical Sciences
https://www.readbyqxmd.com/read/27925287/treatment-sequence-matters-anabolic-and-antiresorptive-therapy-for-osteoporosis
#9
Felicia Cosman, Jeri W Nieves, David Dempster
The majority of osteoporosis medications are antiresorptive agents, which reduce the rate of bone remodeling. Within this group are the bisphosphonates, which inhibit protein prenylation in the mature osteoclast, reducing osteoclast capacity to resorb bone(1) and denosumab, a monoclonal antibody to rank ligand that inhibits osteoclast formation, function and survival(2) . Although several new anabolic agents are in development(3-5) , teriparatide is currently the only available anabolic therapy for osteoporosis in the United States, with the addition of only PTH(1-84) in the EU [referred to as PTH)...
December 7, 2016: Journal of Bone and Mineral Research: the Official Journal of the American Society for Bone and Mineral Research
https://www.readbyqxmd.com/read/27924122/a-tomato-plastidic-atp-adp-transporter-gene-slaatp-increases-starch-content-in-transgenic-arabidopsis
#10
Feibing Wang, Yuxiu Ye, Yuan Niu, Faxiang Wan, Bo Qi, Xinhong Chen, Qing Zhou, Boqing Chen
A plastidic ATP/ADP transporter (AATP) is responsible for importing ATP from the cytosol into plastids. Increasing the ATP supply is a potential way to facilitate anabolic synthesis in heterotrophic plastids of plants. In this work, a gene encoding the AATP protein, named SlAATP, was successfully isolated from tomato. Expression of SlAATP was induced by exogenous sucrose treatment in tomato. The coding region of SlAATP was cloned into a binary vector under the control of 35S promoter and then transformed into Arabidopsis to obtain transgenic plants...
October 2016: Physiology and Molecular Biology of Plants: An International Journal of Functional Plant Biology
https://www.readbyqxmd.com/read/27923758/evidence-for-use-of-teriparatide-in-spinal-fusion-surgery-in-osteoporotic-patients
#11
REVIEW
Navjot Chaudhary, Jennifer S Lee, Joy Y Wu, Suzanne Tharin
Osteoporosis is defined as a bone mineral density (BMD) less than 2.5 standard deviations below the mean BMD at peak bone mass, or the presence of a fragility fracture. In the setting of osteoporosis, early hardware loosening is thought to cause decreased spinal fusion rates. The two mainstays of osteoporosis treatment are bisphosphonates and Teriparatide. Teriparatide, a form of synthetic parathyroid hormone (PTH), is an anabolic agent that increases osteoblast activity and, thereby, bone mass. Preclinical studies in animal models show that Teriparatide increases spinal fusion rates...
December 3, 2016: World Neurosurgery
https://www.readbyqxmd.com/read/27922682/gene-expression-profiles-of-cyp24a1-and-cyp27b1-in-malignant-and-normal-breast-tissues
#12
Naghmeh Zhalehjoo, Yadollah Shakiba, Mojtaba Panjehpour
Active vitamin D has several antitumor effects, including prodifferentiative, antiproliferative and proapoptotic functions in a number of tissues via its binding to vitamin D receptor. The 24‑hydroxylase (CYP24A1) and 1‑hydroxylase (CYP27B1) enzymes are considered to be pivotal determinants of the local concentration of active vitamin D. The aim of the present study was to investigate the mRNA expression levels of the CYP24A1 and CYP27B1 genes in malignant and normal breast tissues. The tumor and adjacent normal tissue samples of 30 patients with breast cancer were acquired from the Iran National Tumor Bank, Imam Hospital (Tehran, Iran)...
December 6, 2016: Molecular Medicine Reports
https://www.readbyqxmd.com/read/27921147/can-the-alendronate-dosage-be-altered-when-combined-with-high-frequency-loading-in-osteoporosis-treatment
#13
C B Correa, G V Camargos, M Chatterjee, M F Mesquita, A A Del Bel Cury, I Naert, J Duyck, K Vandamme
: Alendronate therapy has been associated with serious side effects. Altering the alendronate concentration and combining with high-frequency loading as mechanical intervention was explored in this animal study as a treatment for osteoporosis. The bone anabolic potency of high-frequency loading was overruled by the different alendronate dosages applied in the present study. Further exploration of reduced hormonal therapy associated with mechanical interventions in osteoporosis treatment should be sought...
December 5, 2016: Osteoporosis International
https://www.readbyqxmd.com/read/27920805/abaloparatide
#14
REVIEW
Stefano Gonnelli, Carla Caffarelli
Abaloparatide is an investigational analog of human PTHrP (1-34) being developed for the treatment of osteoporosis. The amino-acid sequence of abaloparatide is identical to that of PTHrP in the first 20 amino-acids, while over half of the remaining amino-acids are different. Some studies in animals and in humans reported that abaloparatide presented a potent anabolic activity with reduced effects on bone resorption as compared to that observed with teriparatide. This may be due to a more transient signaling response of abaloparatide related to differing affinities of the two drugs to the specific conformations of the PTH1 receptor...
May 2016: Clinical Cases in Mineral and Bone Metabolism
https://www.readbyqxmd.com/read/27920253/bmp-induces-osteoblast-differentiation-through-both-smad4-and-mtorc1-signaling
#15
Courtney M Karner, Seung-Yon Lee, Fanxin Long
The bone morphogenetic protein (Bmp) family of secreted molecules has been extensively studied in the context of osteoblast differentiation. However, the intracellular signaling cascades mediating the osteoblastogenic function of Bmp have not been fully elucidated. By profiling mRNA expression in the bone marrow mesenchymal progenitor cell line ST2 cells, we discover that BMP2 induces not only genes commonly associated with ossification and mineralization, but also genes important for general protein synthesis...
December 5, 2016: Molecular and Cellular Biology
https://www.readbyqxmd.com/read/27918964/sarcopenia-in-older-mice-is-characterized-by-a-decreased-anabolic-response-to-a-protein-meal
#16
Miriam van Dijk, Jolanda Nagel, Francina J Dijk, Jerôme Salles, Sjors Verlaan, Stephane Walrand, Klaske van Norren, Yvette Luiking
Ageing is associated with sarcopenia, a progressive decline of skeletal muscle mass, muscle quality and muscle function. Reduced sensitivity of older muscles to respond to anabolic stimuli, i.e. anabolic resistance, is part of the underlying mechanisms. Although, muscle parameters have been studied in mice of various ages/strains; the aim was to study if mice display similar deteriorating processes as human ageing. Therefore, 10,16,21 and 25 months-old C57BL6/6J male mice were studied to measure parameters of sarcopenia and factors contributing to its pathophysiology, with the aim of characterizing sarcopenia in old mice...
November 27, 2016: Archives of Gerontology and Geriatrics
https://www.readbyqxmd.com/read/27917836/the-crystal-structure-of-dihydrodipicolinate-reductase-from-the-human-pathogenic-bacterium-bartonella-henselae-strain-houston-1-at-2-3%C3%A2-%C3%A3-resolution
#17
Ali R Cala, Maria T Nadeau, Jan Abendroth, Bart L Staker, Alexandra R Reers, Anthony W Weatherhead, Renwick C J Dobson, Peter J Myler, André O Hudson
In bacteria, the second committed step in the diaminopimelate/lysine anabolic pathways is catalyzed by the enzyme dihydrodipicolinate reductase (DapB). DapB catalyzes the reduction of dihydrodipicolinate to yield tetrahydrodipicolinate. Here, the cloning, expression, purification, crystallization and X-ray diffraction analysis of DapB from the human-pathogenic bacterium Bartonella henselae, the causative bacterium of cat-scratch disease, are reported. Protein crystals were grown in conditions consisting of 5%(w/v) PEG 4000, 200 mM sodium acetate, 100 mM sodium citrate tribasic pH 5...
December 1, 2016: Acta Crystallographica. Section F, Structural Biology Communications
https://www.readbyqxmd.com/read/27917191/tomato-fk506-binding-protein-12kd-fkbp12-mediates-the-interaction-between-rapamycin-and-target-of-rapamycin-tor
#18
Fangjie Xiong, Pan Dong, Mei Liu, Gengxin Xie, Kai Wang, Fengping Zhuo, Li Feng, Lu Yang, Zhengguo Li, Maozhi Ren
Target of Rapamycin (TOR) signaling is an important regulator in multiple organisms including yeast, plants, and animals. However, the TOR signaling in plants is much less understood as compared to that in yeast and animals. TOR kinase can be efficiently suppressed by rapamycin in the presence of functional FK506 Binding Protein 12 KD (FKBP12) in yeast and animals. In most examined higher plants rapamycin fails to inhibit TOR kinase due to the non-functional FKBP12. Here we find that tomato plants showed obvious growth inhibition when treated with rapamycin and the inhibitory phenotype is similar to suppression of TOR causing by active-site TOR inhibitors (asTORis) such as KU63794, AZD8055, and Torin1...
2016: Frontiers in Plant Science
https://www.readbyqxmd.com/read/27916294/high-expression-of-phgdh-predicts-poor-prognosis-in-non-small-cell-lung-cancer
#19
Jinhong Zhu, Jianqun Ma, Xudong Wang, Tianjiao Ma, Shu Zhang, Wei Wang, Xiaoyu Zhou, Jiahai Shi
Tumors have exceptionally high demands for energy and anabolism because of their rapid growth. The de novo serine synthesis pathway initiated by phosphoglycerate dehydrogenase (PHGDH) has been recognized as a hallmark of metabolic adaption in carcinogenesis. The oncogenic role and prognostic value of PHGDH have been investigated in multiple cancer types, including breast cancer, melanoma, cervical cancer, and colon cancer. Due to the importance of PHGDH in cancer, we attempted to determine the clinical significance of PHGDH in 319 patients with non-small cell lung cancer (NSCLC)...
December 2016: Translational Oncology
https://www.readbyqxmd.com/read/27913948/branched-chain-amino-acids-administration-suppresses-endurance-exercise-related-activation-of-ubiquitin-proteasome-signaling-in-trained-human-skeletal-muscle
#20
Evgeny A Lysenko, Tatiana F Vepkhvadze, Egor M Lednev, Olga L Vinogradova, Daniil V Popov
We tested whether post exercise ingestion of branched-chain amino acids (BCAA < 10 g) is sufficient to activate signaling associated with muscle protein synthesis and suppress exercise-induced activation of mechanisms associated with proteolysis in endurance-trained human skeletal muscle. Nine endurance-trained athletes performed a cycling bout with and without BCAA ingestion (0.1 g/kg). Post exercise ACC(Ser79/222) phosphorylation (endogenous marker of AMPK activity) was increased (~3-fold, P < 0...
December 3, 2016: Journal of Physiological Sciences: JPS
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