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Oxidative Stress Osteoporosis

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https://www.readbyqxmd.com/read/30318050/overexpression-of-sirt1-in-mesenchymal-stem-cells-protects-against-bone-loss-in-mice-by-foxo3a-deacetylation-and-oxidative-stress-inhibition
#1
Wen Sun, Wanxin Qiao, Bin Zhou, Zixuan Hu, Quanquan Yan, Jun Wu, Rong Wang, Qian Zhang, Dengshun Miao
OBJECTIVE: B cell-specific Moloney murine leukemia virus integration site 1 (Bmi-1) deficiency (Bmi-1-/- ) leads to an osteoporotic phenotype with a significant downregulation of Sirt1 protein expression. Sirtuin 1 (Sirt1) haploinsufficiency results in a bone loss by decreased bone formation; however, it is unclear whether Sirt1 overexpression in mesenchymal stem cells (MSCs) plays an anti-osteoporotic role. The aim of the study is to identify whether the overexpression of Sirt1 in MSCs could restore skeletal growth retardation and osteoporosis in Bmi-1 deficient mice...
November 2018: Metabolism: Clinical and Experimental
https://www.readbyqxmd.com/read/30315933/the-multiple-protective-roles-and-molecular-mechanisms-of-melatonin-and-its-precursor-n-acetylserotonin-in-targeting-brain-injury-and-liver-damage-and-in-maintaining-bone-health
#2
REVIEW
Chengliang Luo, Qiang Yang, Yuancai Liu, Shuanhu Zhou, Jiying Jiang, Russel J Reiter, Pallab Bhattacharya, Yongchun Cui, Hongwei Yang, He Ma, Jiemin Yao, Sean E Lawler, Xinmu Zhang, Jianfang Fu, Renato Rozental, Hany Aly, Mark D Johnson, E Antonio Chiocca, Xin Wang
Melatonin is a neurohormone associated with sleep and wakefulness and is mainly produced by the pineal gland in animals. Numerous physiological functions of melatonin have been demonstrated including anti-inflammation, suppressing neoplastic growth, circadian and endocrine rhythm regulation, and its potent antioxidant activity as well as its role in regeneration of various tissues including the nervous system, liver, bone, kidney, bladder, skin, and muscle, among others. In this review, we summarize the recent advances related to the multiple protective roles of melatonin receptor agonists, melatonin and N-acetylserotonin (NAS) in brain injury, liver damage, and bone health...
October 10, 2018: Free Radical Biology & Medicine
https://www.readbyqxmd.com/read/30279143/fisetin-is-a-senotherapeutic-that-extends-health-and-lifespan
#3
Matthew J Yousefzadeh, Yi Zhu, Sara J McGowan, Luise Angelini, Heike Fuhrmann-Stroissnigg, Ming Xu, Yuan Yuan Ling, Kendra I Melos, Tamar Pirtskhalava, Christina L Inman, Collin McGuckian, Erin A Wade, Jonathon I Kato, Diego Grassi, Mark Wentworth, Christin E Burd, Edgar A Arriaga, Warren L Ladiges, Tamara Tchkonia, James L Kirkland, Paul D Robbins, Laura J Niedernhofer
BACKGROUND: Senescence is a tumor suppressor mechanism activated in stressed cells to prevent replication of damaged DNA. Senescent cells have been demonstrated to play a causal role in driving aging and age-related diseases using genetic and pharmacologic approaches. We previously demonstrated that the combination of dasatinib and the flavonoid quercetin is a potent senolytic improving numerous age-related conditions including frailty, osteoporosis and cardiovascular disease. The goal of this study was to identify flavonoids with more potent senolytic activity...
September 29, 2018: EBioMedicine
https://www.readbyqxmd.com/read/30277667/alox12-gene-polymorphisms-and-serum-selenium-status-in-elderly-osteoporotic-patients
#4
Atiyeh Al-E-Ahmad, Hadi Parsian, Mojtaba Fathi, Soghrat Faghihzadeh, Seyed Reza Hosseini, Haji Ghorban Nooreddini, Abbas Mosapour
BACKGROUND: Osteoporosis is a systemic bone disease which leads to a reduction in bone mass. Many studies have shown that up to 80% of bone mineral density (BMD) variations are attributed to genetic factors. Arachidonate 12-lipoxygenase enzyme, encoded by the ALOX12 gene, produces lipid peroxides as reactive oxygen species (ROS), leading to oxidative stress and the development of osteoporosis. Selenium (Se) is incorporated into selenoproteins, which may reduce the risk of osteoporosis...
October 2, 2018: Advances in Clinical and Experimental Medicine: Official Organ Wroclaw Medical University
https://www.readbyqxmd.com/read/30271665/glycation-damage-a-possible-hub-for-major-pathophysiological-disorders-and-aging
#5
REVIEW
Maxime Fournet, Frédéric Bonté, Alexis Desmoulière
Glycation is both a physiological and pathological process which mainly affects proteins, nucleic acids and lipids. Exogenous and endogenous glycation produces deleterious reactions that take place principally in the extracellular matrix environment or within the cell cytosol and organelles. Advanced glycation end product (AGE) formation begins by the non-enzymatic glycation of free amino groups by sugars and aldehydes which leads to a succession of rearrangements of intermediate compounds and ultimately to irreversibly bound products known as AGEs...
October 2018: Aging and Disease
https://www.readbyqxmd.com/read/30235855/antioxidative-1-4-dihydropyridine-derivatives-modulate-oxidative-stress-and-growth-of-human-osteoblast-like-cells-in-vitro
#6
Lidija Milkovic, Tea Vukovic, Neven Zarkovic, Franz Tatzber, Egils Bisenieks, Zenta Kalme, Imanta Bruvere, Zaiga Ogle, Janis Poikans, Astrida Velena, Gunars Duburs
Oxidative stress has been implicated in pathophysiology of different human stress- and age-associated disorders, including osteoporosis for which antioxidants could be considered as therapeutic remedies as was suggested recently. The 1,4-dihydropyridine (DHP) derivatives are known for their pleiotropic activity, with some also acting as antioxidants. To find compounds with potential antioxidative activity, a group of 27 structurally diverse DHPs, as well as one pyridine compound, were studied. A group of 11 DHPs with 10-fold higher antioxidative potential than of uric acid, were further tested in cell model of human osteoblast-like cells...
September 19, 2018: Antioxidants (Basel, Switzerland)
https://www.readbyqxmd.com/read/30225503/icariin-and-icaritin-recover-uvb-induced-photoaging-by-stimulating-nrf2-are-and-reducing-ap-1-and-nf-%C3%AE%C2%BAb-signaling-pathways-a-comparative-study-on-uvb-irradiated-human-keratinocytes
#7
Eunson Hwang, Pei Lin, Hien T T Ngo, Wei Gao, Yu-Shuai Wang, Hong-Shan Yu, Tae-Hoo Yi
Icariin (ICA) and icaritin (ICT) exhibit many pharmacological functions including anti-osteoporosis, anti-cardiovascular, and anti-cancer activities; however, there are few comprehensive studies that track the detailed effects on UVB-induced photoaging. The recovery effects of ICA and ICT were investigated in UVB-irradiated human keratinocytes (HaCaTs). The results indicated that ICT and ICA showed strong radical scavenging activity, and the reactive oxygen species (ROS) scavenging activity of ICT was superior...
October 10, 2018: Photochemical & Photobiological Sciences
https://www.readbyqxmd.com/read/30216504/autophagy-in-osteoporosis-relation-to-oxidative-stress
#8
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/30212470/ginsenoside-rb1-does-not-halt-osteoporotic-bone-loss-in-ovariectomized-rats
#9
JiaXin Bei, XinLe Zhang, JingKai Wu, ZhuoQing Hu, BiLian Xu, Sien Lin, Liao Cui, Tie Wu, LiYi Zou
Osteoporosis (OP) is a systemic skeletal disorder, manifesting with a reduction in bone mass and deterioration of the microarchitecture. Mesenchymal stem cells (MSCs) have an innate ability to differentiate into several cell types, including osteoblasts (OB). Ginsenoside Rb1 (GRb1) is an ethanol extract from ginseng and contains a highly concentrated form of ginsenoside. GRb1 shows extensive beneficial health effects such as anti-oxidative and anti-inflammatory functions, modulating the immune system and inhibiting osteoclastogenesis...
2018: PloS One
https://www.readbyqxmd.com/read/30209244/anp32a-regulates-atm-expression-and-prevents-oxidative-stress-in-cartilage-brain-and-bone
#10
Frederique M F Cornelis, Silvia Monteagudo, Laura-An K A Guns, Wouter den Hollander, Rob G H H Nelissen, Lies Storms, Tine Peeters, Ilse Jonkers, Ingrid Meulenbelt, Rik J Lories
Osteoarthritis is the most common joint disorder with increasing global prevalence due to aging of the population. Current therapy is limited to symptom relief, yet there is no cure. Its multifactorial etiology includes oxidative stress and overproduction of reactive oxygen species, but the regulation of these processes in the joint is insufficiently understood. We report that ANP32A protects the cartilage against oxidative stress, preventing osteoarthritis development and disease progression. ANP32A is down-regulated in human and mouse osteoarthritic cartilage...
September 12, 2018: Science Translational Medicine
https://www.readbyqxmd.com/read/30192012/luteolin-attenuates-glucocorticoid-induced-osteoporosis-by-regulating-erk-lrp-5-gsk-3%C3%AE-signaling-pathway-in-vivo-and-in-vitro
#11
Zheng Jing, Changyuan Wang, Qining Yang, Xuelian Wei, Yue Jin, Qiang Meng, Qi Liu, Zhihao Liu, Xiaodong Ma, Kexin Liu, Huijun Sun, Mozhen Liu
Glucocorticoid-induced osteoporosis (GIO) is a secondary osteoporosis with extensive use of glucocorticoids (GCs). GCs can increase bone fragility and fracture via inhibiting osteoblastic proliferation and differentiation. Luteolin (LUT), a kind of plant flavonoid, has been reported to exhibit the antioxidant activity, but the effects of LUT on GIO still remain unclear. This study aimed to investigate the effects of LUT on GIO both in vivo and in vitro and elaborate the potential molecular mechanisms. LUT increased the superoxide dismutase activity, glutathione level and decreased reactive oxygen species (ROS) level and lactate dehydrogenase release in GIO...
September 7, 2018: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/30187446/colloidally-stable-small-unilamellar-stearyl-amine-lipoplexes-for-effective-bmp-9-gene-delivery-to-stem-cells-for-osteogenic-differentiation
#12
Imran Vhora, Rohan Lalani, Priyanka Bhatt, Sushilkumar Patil, Hinal Patel, Vivek Patel, Ambikanandan Misra
The biocompatibility of cationic liposomes has led to their clinical translation in gene delivery and their application apart from cancer to cardiovascular diseases, osteoporosis, metabolic diseases, and more. We have prepared PEGylated stearyl amine (pegSA) lipoplexes meticulously considering the physicochemical properties and formulation parameters to prepare single unilamellar vesicles (SUV) of < 100 nm size which retain their SUV nature upon complexation with pDNA rather than the conventional lipoplexes which show multilamellar nature...
September 5, 2018: AAPS PharmSciTech
https://www.readbyqxmd.com/read/30173080/inflammatory-and-metabolic-mechanisms-underlying-the-calcific-aortic-valve-disease
#13
REVIEW
Kyoung Im Cho, Ichiro Sakuma, Il Suk Sohn, Sang-Ho Jo, Kwang Kon Koh
Although calcific aortic stenosis is a very common disease with major adverse cardiovascular events and healthcare costs, there are no effective medical interventions to delay or halt its progression. Cardiometabolic risk factors, including smoking and male sex, are linked to aortic stenosis. Emerging studies have identified important regulatory roles for immunological and inflammatory responses, including oxidized lipids, various cytokines, and biomineralization. Recent clinical and experimental studies in atherosclerosis and osteoporosis have demonstrated that oxidative stress and oxidized lipids decrease bone formation in the skeletal system while they increase bone formation in the cardiovascular system...
October 2018: Atherosclerosis
https://www.readbyqxmd.com/read/30146742/protective-effects-of-2-3-5-4-tetrahydroxystilbene-2-o-%C3%AE-d-glucoside-against-osteoporosis-current-knowledge-and-proposed-mechanisms
#14
Jinkang Zhang, Songlin Li, Linlan Wei, Ye Peng, Ziyang Zheng, Jing Xue, Yukun Cao, Bin Wang, Junjie Du
AIM: The aim of this study was to explore the mechanism underlying the protective effects of 2,3,5,4-tetrahydroxystilbene-2-o-β-D-glucoside (TSG) against osteoporosis. METHOD: MC3T3-E1 mouse osteoblast precursor cells were used to analyze the protective effects of TSG on osteoblast apoptosis and differential inhibition induced by oxidative stress to determine the gene expression of forkhead transcription factor FKHRL1 (FoxO3a), T cell factors (TCFs), and downstream genes...
August 2018: International Journal of Rheumatic Diseases
https://www.readbyqxmd.com/read/30116976/the-effects-of-homocysteine-on-the-skeleton
#15
REVIEW
Mitsuru Saito, Keishi Marumo
PURPOSE OF REVIEW: Homocystinuria is a congenital metabolic disorder in which cystathionine β-synthase deficiency results in a prominent increase in homocysteine (serum levels > 100 μM), causing mental retardation, atherosclerotic cerebral infarction, and osteoporosis accompanied by fragility fractures. Encountering a case with excessive homocysteinemia such as that seen in hereditary homocystinuria is unlikely during usual medical examinations. However, in individuals who have vitamin B or folate deficiency, serum homocysteine concentrations are known to increase...
October 2018: Current Osteoporosis Reports
https://www.readbyqxmd.com/read/30114641/postmenopausal-osteoporosis-and-breast-cancer-the-biochemical-links-and-beneficial-effects-of-functional-foods
#16
REVIEW
Aliyu Muhammad, Sanusi Bello Mada, Ibrahim Malami, Gilead E Forcados, Ochuko L Erukainure, Hadiza Sani, Ibrahim Babangida Abubakar
Breast cancer as a multifactorial disease has been classified among the major causes of morbidity and mortality in women across the world, with a higher prevalence among post-menopausal women. Osteoporosis, a condition characterized by altered bone mineralization is also commonly found among post-menopausal women. Consequently, post-menopausal women are at risk of morbidity and mortality associated with breast cancer and postmenopausal osteoporosis. This may not be unconnected to the fact that, there may be existent biochemical links between the two mayhems, which might rally round between the cellular and molecular connectivity based on the actions and inactions of RANKL, estrogen, free radicals-induced oxidative stress and metabolic implications of age related obesity among others...
November 2018: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/30098424/sarcopenia
#17
Anne Tournadre, Gaelle Vial, Frédéric Capel, Martin Soubrier, Yves Boirie
Sarcopenia is defined as a combination of low muscle mass with low muscle function. The term was first used to designate the loss of muscle mass and performance associated with aging. Now, recognized causes of sarcopenia also include chronic disease, a physically inactive lifestyle, loss of mobility, and malnutrition. Sarcopenia should be differentiated from cachexia, which is characterized not only by low muscle mass but also by weight loss and anorexia. Sarcopenia results from complex and interdependent pathophysiological mechanisms that include aging, physical inactivity, neuromuscular compromise, resistance to postprandial anabolism, insulin resistance, lipotoxicity, endocrine factors, oxidative stress, mitochondrial dysfunction, and inflammation...
August 8, 2018: Joint, Bone, Spine: Revue du Rhumatisme
https://www.readbyqxmd.com/read/30060293/cytoprotective-effect-of-taurine-against-hydrogen-peroxide-induced-oxidative-stress-in-umr-106-cells-through-the-wnt-%C3%AE-catenin-signaling-pathway
#18
Jing Lou, Donghe Han, Huihui Yu, Guang Yu, Meihua Jin, Sung-Jin Kim
Osteoporosis development is closely associated with oxidative stress and reactive oxygen species (ROS). Taurine has potential antioxidant effects, but its role in osteoblasts is not clearly understood. The aim of this study was to determine the protective effects and mechanisms of actions of taurine on hydrogen peroxide (H2 O2 )-induced oxidative stress in osteoblast cells. UMR-106 cells were treated with taurine prior to H2 O2 exposure. After treatment, cell viability, apoptosis, intracellular ROS production, malondialdehyde content, and alkaline phosphate (ALP) activity were measured...
July 30, 2018: Biomolecules & Therapeutics
https://www.readbyqxmd.com/read/30055190/hiv-antiretroviral-therapy-drugs-induce-premature-senescence-and-altered-physiology-in-huvecs
#19
Justin Cohen, Luca D'Agostino, Ferit Tuzer, Claudio Torres
Developments in medicine have led to a significant increase in the average human lifespan. This increase in aging is most readily apparent in the case of HIV where antiretroviral therapy has shifted infection from a terminal to a chronic but manageable disease. Despite this advance, patients suffer from co-morbidities best described as an accelerated aging phenotype. A potential contributor is cellular senescence, an aging-associated growth arrest, which has already been linked to other HIV co-morbidities such as lipodystrophies and osteoporosis in response to antiretroviral drugs...
October 2018: Mechanisms of Ageing and Development
https://www.readbyqxmd.com/read/30049915/-fragility-fractures-in-hemodialysis-patients-frailty-and-fragility-fractures-among-dialysis-patients
#20
Kenichi Akiyama, Norio Hanafusa
According to the current status of chronic dialysis therapy in Japan 2016, the average age at the time of dialysis initiation is 68.57 years for males and 71.19 years for females, which has been rising continuously. Frailty is a geriatric syndrome that is frequently seen in the elderly. It is known that frailty among dialysis patients are more common than the general population of the same age, and that frailty is associated with life prognosis. As eGFR decreases, BMD decreases and fracture risk increase, and dialysis patients are at the highest risk of fracture in CKD patients...
2018: Clinical Calcium
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