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https://www.readbyqxmd.com/read/29352392/impact-of-dexamethasone-concentration-on-cartilage-tissue-formation-from-human-synovial-derived-stem-cells-in-vitro
#1
Ryota Chijimatsu, Masato Kobayashi, Kosuke Ebina, Toru Iwahashi, Yosuke Okuno, Makoto Hirao, Atsunori Fukuhara, Norimasa Nakamura, Hideki Yoshikawa
Human synovial mesenchymal stem cells (hSMSCs) are a promising cell source for cartilage regeneration because of their superior chondrogenic potential in vitro. This study aimed to further optimize the conditions for inducing chondrogenesis of hSMSCs, focusing on the dose of dexamethasone in combination with transforming growth factor-β3 (TGFβ3) and/or bone morphogenetic protein-2 (BMP2). When hSMSCs-derived aggregates were cultured with TGFβ3, dexamethasone up to 10 nM promoted chondrogenesis, but attenuated it with heterogeneous tissue formation when used at concentrations over than 100 nM...
January 19, 2018: Cytotechnology
https://www.readbyqxmd.com/read/29349300/tensile-forces-drive-a-reversible-fibroblast-to-myofibroblast-transition-during-tissue-growth-in-engineered-clefts
#2
Philip Kollmannsberger, Cécile M Bidan, John W C Dunlop, Peter Fratzl, Viola Vogel
Myofibroblasts orchestrate wound healing processes, and if they remain activated, they drive disease progression such as fibrosis and cancer. Besides growth factor signaling, the local extracellular matrix (ECM) and its mechanical properties are central regulators of these processes. It remains unknown whether transforming growth factor-β (TGF-β) and tensile forces work synergistically in up-regulating the transition of fibroblasts into myofibroblasts and whether myofibroblasts undergo apoptosis or become deactivated by other means once tissue homeostasis is reached...
January 2018: Science Advances
https://www.readbyqxmd.com/read/29346060/a-combination-with-probiotic-complex-zinc-and-coenzyme-q10-attenuates-autoimmune-arthritis-by-regulation-of-th17-treg-balance
#3
Seon-Young Lee, Seung Hoon Lee, JooYeon Jhun, Hyeon-Beom Seo, Kyung Ah Jung, Chul Woo Yang, Sung-Hwan Park, Mi-La Cho
Probiotic complex, zinc, and coenzyme Q10 (CoQ10) are recognized dietary supplements with an anti-inflammatory role. Although these supplementations are individually known to benefit rheumatoid arthritis (RA), there is no evidence suggesting any synergic effect. The primary goal of this study is to determine whether probiotic complex, zinc, and CoQ10 attenuate the development of collagen-induced arthritis (CIA). The combination of probiotic complex, zinc, and CoQ10 reduced CIA severity by downregulating the levels of IgG, IgG1, and IgG2a in serum...
January 2018: Journal of Medicinal Food
https://www.readbyqxmd.com/read/29345167/dietary-supplements-for-health-adaptation-and-recovery-in-athletes
#4
Eric S Rawson, Mary P Miles, D Enette Larson-Meyer
Some dietary supplements are recommended to athletes based on data that supports improved exercise performance. Other dietary supplements are not ergogenic per se, but may improve health, adaptation to exercise, or recovery from injury, and so could help athletes to train and/or compete more effectively. In this review, we describe several dietary supplements that may improve health, exercise adaptation, or recovery. Creatine monohydrate may improve: recovery from and adaptation to intense training, recovery from periods of injury with extreme inactivity, cognitive processing, and reduce severity of or enhance recovery from mild traumatic brain injury (mTBI)...
January 18, 2018: International Journal of Sport Nutrition and Exercise Metabolism
https://www.readbyqxmd.com/read/29337906/specific-collagen-peptides-improve-bone-mineral-density-and-bone-markers-in-postmenopausal-women-a-randomized-controlled-study
#5
Daniel König, Steffen Oesser, Stephan Scharla, Denise Zdzieblik, Albert Gollhofer
Introduction: Investigations in rodents as well as in vitro experiments have suggested an anabolic influence of specific collagen peptides (SCP) on bone formation and bone mineral density (BMD). The goal of the study was to investigate the effect of 12-month daily oral administration of 5 g SCP vs. placebo (CG: control group) on BMD in postmenopausal women with primary, age-related reduction in BMD. Methods: 131 women were enrolled in this randomized, placebo-controlled double-blinded investigation. The primary endpoint was the change in BMD of the femoral neck and the spine after 12 months...
January 16, 2018: Nutrients
https://www.readbyqxmd.com/read/29337188/abrogation-of-fam20c-altered-cell-behaviors-and-bmp-signaling-of-immortalized-dental-mesenchymal-cells
#6
Chao Liu, Nan Zhou, Yu Wang, Hua Zhang, Priyam Jani, Xiaofang Wang, Yongbo Lu, Nan Li, Jing Xiao, Chunlin Qin
FAM20C mutations compromise the mineralization of skeleton and tooth in both human and mouse. Putatively, the mineralization disorder is attributed to the elevated fibroblast growth factor 23 (FGF23), which reduced the serum phosphorus by suppressing the reabsorption of phosphorus in kidney. Besides the regulation on systemic phosphorus homeostasis, FAM20C was also implicated to regulate cell behaviors and gene expression through a cell-autonomous manner. To identify the primary effects of Fam20c on dental mesenchymal cells, mouse Fam20c-deficient dental mesenchymal cells were generated by removing the floxed alleles from the immortalized mouse Fam20cf/f dental mesenchymal cells with Cre-expressing lentivirus...
January 11, 2018: Experimental Cell Research
https://www.readbyqxmd.com/read/29329415/establishment-of-a-three-dimensional-model-to-study-human-uterine-angiogenesis
#7
Camille L Duran, Colette A Abbey, Kayla J Bayless
STUDY QUESTION: Can primary human uterine microvascular endothelial cells (UtMVECs) be used as a model to study uterine angiogenic responses in vitro that are relevant in pregnancy? SUMMARY ANSWER: UtMVECs demonstrated angiogenic responses when stimulated with proangiogenic factors, including sphingosine 1-phosphate (S1P), vascular endothelial growth factor (VEGF), basic fibroblast growth factor (bFGF), physiological levels of wall shear stress (WSS), human chorionic gonadotropin (hCG) and various combinations of estrogen and progesterone...
December 21, 2017: Molecular Human Reproduction
https://www.readbyqxmd.com/read/29326062/functional-effects-of-an-interpenetrating-polymer-network-on-articular-cartilage-mechanical-properties
#8
Janne Ta Mäkelä, Benjamin G Cooper, Rami K Korhonen, Mark W Grinstaff, Brian D Snyder
OBJECTIVE: Depletion of glycosaminoglycans (GAGs) and degradation of collagen network are early hallmarks of osteoarthritis. Currently, there are no chondroprotective therapies that mitigate the loss of GAGs or effectively restore the collagen network. Recently, a novel polymeric cartilage supplement was described that forms a charged interpenetrating polymer network (IPN) reconstituting the hydrophilic properties of the extracellular matrix. To investigate the mechanism by which this hydrophilic IPN improves articular cartilage material properties, a finite element (FE) model is used to evaluate the IPN's effect on the fibrillar collagen network, nonfibrillar matrix, and interstitial fluid flow...
January 8, 2018: Osteoarthritis and Cartilage
https://www.readbyqxmd.com/read/29307496/dithiothreitol-supplementation-mitigates-hepatic-and-renal-injury-in-bile-duct-ligated-mice-potential-application-in-the-treatment-of-cholestasis-associated-complications
#9
Reza Heidari, Vahid Ghanbarinejad, Hamidreza Mohammadi, Asrin Ahmadi, Athena Esfandiari, Negar Azarpira, Hossein Niknahad
Cholestasis is a disorder characterized by impaired bile flow and accumulation of cytotoxic bile acids in the liver. On the other hand, oxidative stress and its deleterious consequences seem to have a significant role in cholestasis-induced organ injury. Hence, antioxidants and thiol-reducing agents could have potential protective effect against this complication. The current investigation was designed to evaluate the effect of dithiothreitol (DTT) as a safe and clinically applicable thiol-reductant in cholestatic animals...
January 4, 2018: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29278652/parp1-induces-cardiac-fibrosis-by-mediating-mtor-activity
#10
Shuya Sun, Yuehuai Hu, Qiyao Zheng, Zhen Guo, Duanping Sun, Shaorui Chen, Yiqiang Zhang, Peiqing Liu, Jing Lu, Jianmin Jiang
Cardiac fibrosis is involved in nearly all forms of heart diseases, and is characterized by excessive deposition of extracellular matrix (ECM) proteins by cardiac fibroblasts (CFs). We and others have reported the possibility of poly(ADP-ribose) polymerase 1 (PARP1), the founding subtype of the PARPs enzyme family, as a novel therapeutic target of heart diseases. The cardiac fibrotic induction of mTOR (mammalian target of rapamycin) is mainly due to collagen expression, Smad3 and p53/JNK-mediated apoptosis...
December 26, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/29274979/effects-of-prepartum-dietary-cation-anion-difference-and-source-of-vitamin-d-in-dairy-cows-vitamin-d-mineral-and-bone-metabolism
#11
R M Rodney, N Martinez, E Block, L L Hernandez, P Celi, C D Nelson, J E P Santos, I J Lean
Pregnant Holstein cows, 28 nulliparous and 51 parous, were blocked by parity and milk yield and randomly allocated to receive diets that differed in dietary cation-anion difference (DCAD), +130 or -130 mEq/kg, and supplemented with either calcidiol or cholecalciferol at 3 mg/11 kg of dry matter from 255 d of gestation until parturition. Blood was sampled thrice weekly prepartum, and on d 0, 1, 2, 3, 6, 9, 12, 15, 18, 21, 24, 27, and 30 postpartum to evaluate effects of the diets on vitamin D, mineral and bone metabolism, and acid-base status...
December 20, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/29274033/supplementation-with-an-insoluble-fiber-obtained-from-carob-pod-ceratonia-siliqua-l-rich-in-polyphenols-prevents-dyslipidemia-in-rabbits-through-sirt1-pgc-1%C3%AE-pathway
#12
María Valero-Muñoz, Sandra Ballesteros, Baltasar Ruiz-Roso, Lourdes Pérez-Olleros, Beatriz Martín-Fernández, Vicente Lahera, Natalia de Las Heras
PURPOSE: To investigate the mechanism implicated in the effect of an insoluble fiber (obtained from carob pod) rich in polyphenols (IFCP) in lipid metabolism in the liver. METHODS: Male New Zealand rabbits were fed with the following diets for 8 weeks: control diet (CT group), dyslipidemic diet supplemented with 0.5% cholesterol + 14% coconut oil (DL group) and dyslipidemic diet containing 0.5% cholesterol + 14% coconut oil plus 3% IFCP (DL + IFCP group)...
December 22, 2017: European Journal of Nutrition
https://www.readbyqxmd.com/read/29260292/vitamin-d-supplementation-and-bone-turnover-in-advanced-heart-failure-the-evita-trial
#13
A Zittermann, J B Ernst, S Prokop, U Fuchs, J Dreier, J Kuhn, H K Berthold, S Pilz, I Gouni-Berthold, J F Gummert
Low vitamin D status is common in patients with heart failure and may influence bone health. A daily vitamin D dose of 4000 IU (moderately high dose) for 3 years had however no effect on parameters of bone metabolism, even in patients with very low vitamin D status. INTRODUCTION: Low vitamin D status is common in patients with heart failure (HF) and has been related to disturbed bone turnover. The present study investigated the effect of a daily vitamin D3 dose of 4000 IU on bone turnover markers (BTMs) in patients with advanced HF and 25-hydroxyvitamin D (25OHD) concentrations < 75 nmol/L...
December 19, 2017: Osteoporosis International
https://www.readbyqxmd.com/read/29251111/fully-dedifferentiated-chondrocytes-expanded-in-specific-mesenchymal-stem-cell-growth-medium-with-fgf2-obtains-mesenchymal-stem-cell-phenotype-in-vitro-but-retains-chondrocyte-phenotype-in-vivo
#14
Jungsun Lee, Jin-Yeon Lee, Byung-Chul Chae, Jeongho Jang, EunAh Lee, Youngsook Son
Given recent progress in regenerative medicine, we need a means to expand chondrocytes in quantity without losing their regenerative capability. Although many reports have shown that growth factor supplementation can have beneficial effects, the use of growth factor-supplemented basal media has widespread effect on the characteristics of chondrocytes. Chondrocytes were in vitro cultured in the 2 most widely used chondrocyte growth media, conventional chondrocyte culture medium and mesenchymal stem cell (MSC) culture medium, both with and without fibroblast growth factor-2 (FGF2) supplementation...
October 2017: Cell Transplantation
https://www.readbyqxmd.com/read/29249464/yap-taz-dependent-reprogramming-of-colonic-epithelium-links-ecm-remodeling-to-tissue-regeneration
#15
Shiro Yui, Luca Azzolin, Martti Maimets, Marianne Terndrup Pedersen, Robert P Fordham, Stine L Hansen, Hjalte L Larsen, Jordi Guiu, Mariana R P Alves, Carsten F Rundsten, Jens V Johansen, Yuan Li, Chris D Madsen, Tetsuya Nakamura, Mamoru Watanabe, Ole H Nielsen, Pawel J Schweiger, Stefano Piccolo, Kim B Jensen
Tissue regeneration requires dynamic cellular adaptation to the wound environment. It is currently unclear how this is orchestrated at the cellular level and how cell fate is affected by severe tissue damage. Here we dissect cell fate transitions during colonic regeneration in a mouse dextran sulfate sodium (DSS) colitis model, and we demonstrate that the epithelium is transiently reprogrammed into a primitive state. This is characterized by de novo expression of fetal markers as well as suppression of markers for adult stem and differentiated cells...
November 28, 2017: Cell Stem Cell
https://www.readbyqxmd.com/read/29249017/teriparatide-therapy-for-severe-refractory-osteoradionecrosis-of-the-jaw
#16
Y H Cha, N Hong, Y Rhee, I-H Cha
Although osteoradionecrosis (ORN) is a serious complication of craniofacial radiotherapy, the current management methods remain suboptimal. Teriparatide (TPTD), a recombinant human parathyroid hormone (1-34), has shown beneficial effects on osseous regeneration in medication-related osteonecrosis of the jaw or periodontitis. However, TPTD therapy in irradiated bones has not been indicated yet because of the theoretical risk of osteosarcoma seen in rat models. Hence, we first report here two patients with tongue cancer with late-emerging ORN who were successfully treated with TPTD for 4-6 months with serum calcium and vitamin D supplementation...
December 16, 2017: Osteoporosis International
https://www.readbyqxmd.com/read/29244251/effect-of-combination-folic-acid-vitamin-b6-and-vitamin-b12-supplementation-on-fracture-risk-in-women-a-randomized-controlled-trial
#17
Katie L Stone, Li-Yung Lui, William G Christen, Aron M Troen, Douglas C Bauer, Deborah Kado, Christopher Schambach, Steven R Cummings, JoAnn E Manson
Epidemiologic studies have demonstrated an association of elevated plasma homocysteine levels with greater bone resorption and fracture risk. Vitamins B12 , B6 , and folic acid are cofactors in homocysteine metabolism, and supplementation with B vitamins is effective in lowering homocysteine levels in humans. However, randomized trials of supplemental B vitamins for reduction of fracture risk have been limited. Therefore, we performed an ancillary study to the Women's Antioxidant and Folic Acid Cardiovascular Study (WAFACS), a large randomized trial of women with preexisting cardiovascular disease or three or more coronary risk factors, to test whether a daily B vitamin intervention including folic acid (2...
December 2017: Journal of Bone and Mineral Research: the Official Journal of the American Society for Bone and Mineral Research
https://www.readbyqxmd.com/read/29237353/role-of-geometrical-cues-in-bone-marrow-derived-mesenchymal-stem-cell-survival-growth-and-osteogenic-differentiation
#18
Dhanak Gupta, David M Grant, Kazi M Zakir Hossain, Ifty Ahmed, Virginie Sottile
Mesenchymal stem cells play a vital role in bone formation process by differentiating into osteoblasts, in a tissue that offers not a flat but a discontinuous three-dimensional (3D) topography in vivo. In order to understand how geometry may be affecting mesenchymal stem cells, this study explored the influence of 3D geometry on mesenchymal stem cell-fate by comparing cell growth, viability and osteogenic potential using monolayer (two-dimensional, 2D) with microsphere (3D) culture systems normalised to surface area...
January 1, 2017: Journal of Biomaterials Applications
https://www.readbyqxmd.com/read/29211866/association-of-urinary-citrate-with-acid-base-status-bone-resorption-and-calcium-excretion-in-older-men-and-women
#19
M Kyla Shea, Bess Dawson-Hughes
Context: Elevated urine net acid excretion (NAE), indicative of subclinical metabolic acidosis, has been associated with higher bone turnover. While NAE is the gold-standard clinical measure of acid-base status, it is impractical to measure in most clinical/research settings. Urine citrate, which is commonly measured, changes in response to acid-base status, but its association with bone turnover is uncertain. Objective: To evaluate the association between change in urine citrate and change in bone turnover and calcium excretion...
December 1, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/29208555/hollow-mesoporous-zirconia-delivery-system-for-biomineralization-precursors
#20
Xue-Qing Huang, Hong-Ye Yang, Tao Luo, Cui Huang, Franklin R Tay, Li-Na Niu
Strategies based on the combination of nanocarrier delivery systems and scaffolds provide bone tissue engineering scaffolds with multifunctional capability. Zirconia, a biocompatible ceramic commonly used in orthopedic and dental implants, was used to synthesize hollow mesoporous nanocapsules for loading, storage and sustained release of a novel polyamine-stabilized liquid precursor phase of amorphous calcium phosphate (PAH-ACP) for collagen biomineralization and bone marrow stromal cells osteoinduction. Hollow mesoporous zirconia (hmZrO2) nanocapsules loaded with biomimetic precursors exhibited pH-sensitive release capability and good biocompatibility...
December 2, 2017: Acta Biomaterialia
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