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https://www.readbyqxmd.com/read/28929094/gestational-age-dependent-increase-of-survival-motor-neuron-protein-in-umbilical-cord-derived-mesenchymal-stem-cells
#1
Sota Iwatani, Nur Imma Fatimah Harahap, Dian Kesumapramudya Nurputra, Shinya Tairaku, Akemi Shono, Daisuke Kurokawa, Keiji Yamana, Khin Kyae Mon Thwin, Makiko Yoshida, Masami Mizobuchi, Tsubasa Koda, Kazumichi Fujioka, Mariko Taniguchi-Ikeda, Hideto Yamada, Ichiro Morioka, Kazumoto Iijima, Hisahide Nishio, Noriyuki Nishimura
BACKGROUND: Spinal muscular atrophy (SMA) is the most common genetic neurological disease leading to infant death. It is caused by loss of survival motor neuron (SMN) 1 gene and subsequent reduction of SMN protein in motor neurons. Because SMN is ubiquitously expressed and functionally linked to general RNA metabolism pathway, fibroblasts (FBs) are most widely used for the assessment of SMN expression in SMA patients but usually isolated from skin biopsy samples after the onset of overt symptoms...
2017: Frontiers in Pediatrics
https://www.readbyqxmd.com/read/28928248/carbonic-anhydrase-iii-protects-osteocytes-from-oxidative-stress
#2
Chao Shi, Yuhei Uda, Christopher Dedic, Ehab Azab, Ningyuan Sun, Amira I Hussein, Christopher A Petty, Keertik Fulzele, Maria C Mitterberger-Vogt, Werner Zwerschke, Renata Pereira, Kunzheng Wang, Paola Divieti Pajevic
Osteocytes are master orchestrators of bone remodeling; they control osteoblast and osteoclast activities both directly via cell-to-cell communication and indirectly via secreted factors, and they are the main postnatal source of sclerostin and RANKL (receptor activator of NF-kB ligand), two regulators of osteoblast and osteoclast function. Despite progress in understanding osteocyte biology and function, much remains to be elucidated. Recently developed osteocytic cell lines-together with new genome editing tools-has allowed a closer look at the biology and molecular makeup of these cells...
September 19, 2017: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/28925539/expression-and-functional-proteomic-analyses-of-osteocytes-from-xenopus-laevis-tested-under-mechanical-stress-conditions-preliminary-observations-on-an-appropriate-new-animal-model
#3
Jessika Bertacchini, Marta Benincasa, Marta Checchi, Francesco Cavani, Alberto Smargiassi, Marzia Ferretti, Carla Palumbo
Hitherto, the role of the osteocyte as transducer of mechanical stimuli into biological signals is far from settled. In this study, we used an appropriate model represented by the cortex of Xenopus laevis long bone diaphysis lacking (unlike the mammalian one) of vascular structures and containing only osteocytes inside the bone matrix. These structural features allow any change of protein profile that might be observed upon different experimental conditions, such as bone adaptation to stress/mechanical loading, to be ascribed specifically to osteocytes...
September 19, 2017: Journal of Anatomy
https://www.readbyqxmd.com/read/28921632/elevated-solute-transport-at-sites-of-diffuse-matrix-damage-in-cortical-bone-implications-on-bone-repair
#4
Bin Wang, Xuanhao Sun, Ozan Akkus, Liyun Wang
Diffuse matrix damage in rat cortical bone has been observed to self-repair efficiently in two weeks without activating bone remodeling, and unlike the case with linear cracks, the local osteocytes at the sites of diffuse damage remain healthy. However, the reason(s) for such high efficiency of matrix repair remains unclear. We hypothesized that transport of minerals and other compounds essential for damage repair is enhanced at the damaged sites and further increased by the application of tensile loading. To test our hypothesis, diffuse damage was introduced in notched bovine wafers under cyclic tensile loading and unloading...
September 16, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/28914969/autocrine-and-paracrine-regulation-of-the-murine-skeleton-by-osteocyte-derived-parathyroid-hormone-related-protein
#5
Niloufar Ansari, Patricia W M Ho, Blessing Crimeen-Irwin, Ingrid J Poulton, Athena R Brunt, Mark R Forwood, Paola Divieti Pajevic, Jonathan H Gooi, T John Martin, Natalie A Sims
Parathyroid hormone related-protein (PTHrP) and parathyroid hormone (PTH) have N-terminal domains that bind a common receptor, PTHR1. N-terminal PTH (teriparatide) and now a modified N-terminal PTHrP (abaloparatide) are FDA-approved therapies for osteoporosis. In physiology, 00PTHrP does not normally circulate at significant levels, but acts locally and osteocytes, cells residing within the bone matrix, express both PTHrP and the PTHR1. Since PTHR1 in osteocytes is required for normal bone resorption, we determined how osteocyte-derived PTHrP influences the skeleton...
September 15, 2017: Journal of Bone and Mineral Research: the Official Journal of the American Society for Bone and Mineral Research
https://www.readbyqxmd.com/read/28910744/advanced-glycation-end-products-induced-il-6-and-vegf-a-production-and-apoptosis-in-osteocyte-like-mlo-y4-cells-by-activating-rage-and-erk1-2-p38-and-stat3-signalling-pathways
#6
Helin Chen, Wenjia Liu, Xiangnan Wu, Min Gou, Jiefei Shen, Hang Wang
Advanced glycation end products (AGEs) are involved in osteopenia in people with diabetes and the elderly. Interleukin-6 (IL-6) and vascular endothelial growth factor-A (VEGF-A) are potent regulators of bone metabolism, and in bone tissue, osteocytes are an important source of these regulators. However, whether AGEs can directly regulate IL-6 and VEGF-A secretion by osteocytes is unknown. In this study, we evaluated the effect of AGEs on IL-6 and VEGF- A production as well as apoptosis in osteocyte-like MLO-Y4 cells...
September 11, 2017: International Immunopharmacology
https://www.readbyqxmd.com/read/28900631/single-cell-phosphospecific-flow-cytometric-analysis-of-canine-and-murine-adipose-derived-stem-cells
#7
Harumichi Itoh, Shimpei Nishikawa, Tomoya Haraguchi, Yu Arikawa, Masato Hiyama, Toshie Iseri, Yoshiki Itoh, Munekazu Nakaichi, Yasuho Taura, Kenji Tani, Kazuhito Itamoto
This study aimed to demonstrate single-cell phosphospecific flow cytometric analysis of canine and murine adipose-derived stem/stromal cells (ADSCs). ADSCs were obtained from clinically healthy laboratory beagles and C57BL/6 mice. Cell differentiation into adipocytes, osteocytes, and chondrocytes was observed for the cultured canine ADSCs (cADSCs) and murine ADSCs (mADSCs) to determine their multipotency. We also performed single-cell phosphospecific flow cytometric analysis related to cell differentiation and stemness...
2017: Journal of veterinary medicine
https://www.readbyqxmd.com/read/28892393/micrometre-sized-magnesium-whitlockite-crystals-in-micropetrosis-of-bisphosphonate-exposed-human-alveolar-bone
#8
Furqan Ali A Shah, Bryan E J Lee, James Tedesco, Cecilia L Wexell, Cecilia Persson, Peter Thomsen, Kathryn Grandfield, Anders Palmquist
Osteocytes are contained within spaces called lacunae and play a central role in bone remodelling. Administered frequently to prevent osteoporotic fractures, anti-resorptive agents such as bisphosphonates suppress osteocyte apoptosis and may be localised within osteocyte lacunae. Bisphosphonates also reduce osteoclast viability, and thereby hinder the repair of damaged tissue. Osteocyte lacunae contribute to toughening mechanisms. Following osteocyte apoptosis, the lacunar space undergoes mineralisation, termed 'micropetrosis'...
September 11, 2017: Nano Letters
https://www.readbyqxmd.com/read/28891009/aging-osteocytes-and-mechanotransduction
#9
REVIEW
Haniyeh Hemmatian, Astrid D Bakker, Jenneke Klein-Nulend, G Harry van Lenthe
PURPOSE OF REVIEW: The bone is able to adapt its structure to mechanical signals via the bone remodeling process governed by mechanosensitive osteocytes. With aging, an imbalance in bone remodeling results in osteoporosis. In this review, we hypothesized that changes in lacunar morphology underlie the decreased bone mechanoresponsiveness to mechanical loading with aging. RECENT FINDINGS: Several studies have reported considerable variations in the shape of osteocytes and their lacunae with aging...
September 11, 2017: Current Osteoporosis Reports
https://www.readbyqxmd.com/read/28888391/osteocytes-and-the-bone-lacunar-canalicular-system-insights-into-bone-biology-and-skeletal-function-using-bone-tissue-microstructure
#10
REVIEW
Russell P Main
No abstract text is available yet for this article.
September 2017: International Journal of Paleopathology
https://www.readbyqxmd.com/read/28878383/avascular-necrosis-of-femoral-head-a-metabolomic-biophysical-biochemical-electron-microscopic-and-histopathological-characterization
#11
Aswath Narayanan, Prakash Khanchandani, Roshan M Borkar, Chandrashekar Reddy Ambati, Arun Roy, Xu Han, Ritesh N Bhoskar, Srinivas Ragampeta, Francis Gannon, Vijaya Mysorekar, Balasubramanyam Karanam, Sai Muthukumar V, Venketesh Sivaramakrishnan
Avascular necrosis of the femur head (AVNFH) is a debilitating disease caused due to the use of alcohol, steroids, following trauma or unclear (idiopathic) etiology, affecting mostly the middle aged population. Clinically AVNFH is associated with impaired blood supply to the femoral head resulting in bone necrosis and collapse. Although Homocysteine (HC) has been implicated in AVNFH, levels of homocysteine and its associated pathway metabolites have not been characterized. We demonstrate elevated levels of homocysteine and concomitantly reduced levels of vitamins B6 and B12, in plasma of AVNFH patients...
September 6, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28878136/old-age-causes-de-novo-intracortical-bone-remodeling-and-porosity-in-mice
#12
Marilina Piemontese, Maria Almeida, Alexander G Robling, Ha-Neui Kim, Jinhu Xiong, Jeff D Thostenson, Robert S Weinstein, Stavros C Manolagas, Charles A O'Brien, Robert L Jilka
Decreased cortical thickness and increased cortical porosity are the key anatomic changes responsible for osteoporotic fractures in elderly women and men. The cellular basis of these changes is unbalanced endosteal and intracortical osteonal remodeling by the osteoclasts and osteoblasts that comprise the basic multicellular units (BMUs). Like humans, mice lose cortical bone with age, but unlike humans, this loss occurs in the face of sex steroid sufficiency. Mice are therefore an ideal model to dissect age-specific osteoporotic mechanisms...
September 7, 2017: JCI Insight
https://www.readbyqxmd.com/read/28869591/identification-of-153-new-loci-associated-with-heel-bone-mineral-density-and-functional-involvement-of-gpc6-in-osteoporosis
#13
John P Kemp, John A Morris, Carolina Medina-Gomez, Vincenzo Forgetta, Nicole M Warrington, Scott E Youlten, Jie Zheng, Celia L Gregson, Elin Grundberg, Katerina Trajanoska, John G Logan, Andrea S Pollard, Penny C Sparkes, Elena J Ghirardello, Rebecca Allen, Victoria D Leitch, Natalie C Butterfield, Davide Komla-Ebri, Anne-Tounsia Adoum, Katharine F Curry, Jacqueline K White, Fiona Kussy, Keelin M Greenlaw, Changjiang Xu, Nicholas C Harvey, Cyrus Cooper, David J Adams, Celia M T Greenwood, Matthew T Maurano, Stephen Kaptoge, Fernando Rivadeneira, Jonathan H Tobias, Peter I Croucher, Cheryl L Ackert-Bicknell, J H Duncan Bassett, Graham R Williams, J Brent Richards, David M Evans
Osteoporosis is a common disease diagnosed primarily by measurement of bone mineral density (BMD). We undertook a genome-wide association study (GWAS) in 142,487 individuals from the UK Biobank to identify loci associated with BMD as estimated by quantitative ultrasound of the heel. We identified 307 conditionally independent single-nucleotide polymorphisms (SNPs) that attained genome-wide significance at 203 loci, explaining approximately 12% of the phenotypic variance. These included 153 previously unreported loci, and several rare variants with large effect sizes...
September 4, 2017: Nature Genetics
https://www.readbyqxmd.com/read/28869564/phenolics-isolated-from-aframomum-meleguta-enhance-proliferation-and-ossification-markers-in-bone-cells
#14
Ashraf B Abdel-Naim, Abdullah A Alghamdi, Mardi M Algandaby, Fahad A Al-Abbasi, Ahmed M Al-Abd, Hossam M Abdallah, Ali M El-Halawany, Masao Hattori
Osteoporosis is a serious health problem characterized by decreased bone mineral density and deterioration of bone microarchitecture. Current antiosteoporotic agents exhibit a wide range of adverse effects; meanwhile, phytochemicals are effective and safer alternatives. In the current work, nine compounds belonging to hydroxyphenylalkane and diarylheptanoid groups were isolated from Aframomum meleguea seeds and identified as 6-gingerol (1), 6-paradol (2), 8-dehydrogingerdione (3), 8-gingerol (4), dihydro-6-paradol (5), dihydrogingerenone A (6), dihydrogingerenone C (7), 1,7-bis(3,4-dihydroxy-5-methoxyphenyl)heptane-3,5-diyl diacetate (8), and 1-(3,4-dihydroxy-5-methoxyphenyl)-7-(3,4-dihydroxyphenyl)heptane-3,5-diyl diacetate (9)...
September 4, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28866844/generation-and-characterization-of-transgenic-mouse-mesenchymal-stem-cell-lines-expressing-higf-1-or-hg-csf
#15
Gabrielle V M Gonçalves, Daniela N Silva, Rejane H Carvalho, Bruno S F Souza, Kátia Nunes da Silva, Juliana F Vasconcelos, Bruno D Paredes, Carolina K V Nonaka, Ricardo Ribeiro-Dos-Santos, Milena B P Soares
Mesenchymal stem cells (MSC) are promising tools in the fields of cell therapy and regenerative medicine. In addition to their differentiation potential, MSC have the ability to secrete bioactive molecules that stimulate tissue regeneration. Thus, the overexpression of cytokines and growth factors may enhance the therapeutic effects of MSC. Here we generated and characterized mouse bone marrow MSC lines overexpressing hG-CSF or hIGF-1. MSC lines overexpressing hG-CSF or hIGF-1 were generated through lentiviral vector mediated gene transfer...
September 2, 2017: Cytotechnology
https://www.readbyqxmd.com/read/28863882/evaluation-of-mandibular-bone-after-dental-extraction-in-rats-treated-with-antiresorptive-drugs
#16
Victor Lousan Do Nascimento Poubel, Diogo Lenzi Capella, Adair Roberto Soares Santos, Márcio Correa, Letícia Ruhland Correa, Elena Riet Correa Rivero
PURPOSE: Zoledronic acid (ZOL) and denosumab (Dmab) are commonly used to treat bone pathologies. Because these drugs suppress bone metabolism, this study sought to compare their effect on bone repair after tooth extraction. MATERIALS AND METHODS: Four-week-old male Wistar rats were randomly assigned to 1 of 3 groups: ZOL 0.125 mg/kg, Dmab 0.25 mg/kg, or saline solution 10 mL/kg (control). After 1 week of treatment, the first left molar was extracted; the rats were euthanized at 28 days...
August 3, 2017: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28861876/isolation-of-primary-osteoblast-cell-lines-from-adult-rat-and-rat-embryos-and-their-use-as-models-for-in-vitro-biocompatibility-tests-of-nanostructured-titanium-based-implants
#17
Y Y Khrunyk, I V Vyalykh, A V Korelin, S V Belikov, M S Karabanalov, S B Rakitin, R V Kamalov, A A Popov
Methods for obtaining osteoblast cultures from the calvaria of adult Wistar rats and 12-day-old embryos of these rats have been adapted for studying the biocompatibility and ossointegration of titanium-based implants. The osteoblast morphology and their differentiation into osteocytes on a titanium matrix with specially treated surface have been studied. It has been confirmed that two cultures of diploid rat cells obtained in the study can serve as efficient models for preclinical in vitro testing of nanostructured titanium implants for biocompatibility and osseointegration...
July 2017: Doklady Biological Sciences: Proceedings of the Academy of Sciences of the USSR, Biological Sciences Sections
https://www.readbyqxmd.com/read/28855706/chondrogenesis-and-osteogenesis-are-one-continuous-developmental-and-lineage-defined-biological-process
#18
Yan Jing, Junjun Jing, Ling Ye, Xiaohua Liu, Stephen E Harris, Robert J Hinton, Jian Q Feng
Although chondrogenesis and osteogenesis are considered as two separate processes during endochondral bone formation after birth, recent studies have demonstrated the direct cell transformation from chondrocytes into bone cells in postnatal bone growth. Here we use cell lineage tracing and multiple in vivo approaches to study the role of Bmpr1a in endochondrogenesis. Our data showed profound changes in skeletal shape, size and structure when Bmpr1a was deleted using Aggrecan-Cre (ERT2) in early cartilage cells with a one-time tamoxifen injection...
August 30, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28846679/microgrooved-surface-topography-enhances-cellular-division-and-proliferation-of-mouse-bone-marrow-derived-mesenchymal-stem-cells
#19
Jitendra Kumar Chaudhary, Pramod C Rath
Mesenchymal stem cells' (MSCs) fate is largely determined by the various topographical features and a range of extracellular matrix (ECM) components present in their niches. Apart from maintaining structural stability, they regulate cell morphology, division, proliferation, migration and differentiation among others. Traditional MSC cultures, which are mainly based on two-dimensional smooth surfaces of culture dishes and plates, do not provide topographical cues similar to in vivo three-dimensional niches, impacting various cellular processes...
2017: PloS One
https://www.readbyqxmd.com/read/28836402/umbilical-cord-blood-platelet-lysate-as-serum-substitute-in-expansion-of-human-mesenchymal-stem-cells
#20
Negin Shirzad, Sima Bordbar, Alireza Goodarzi, Monire Mohammad, Pardis Khosravani, Froughazam Sayahpour, Mohamadreza Baghaban Eslaminejad, Marzieh Ebrahimi
OBJECTIVES: The diverse clinical applications for human mesenchymal stem cells (hMSCs) in cellular therapy and regenerative medicine warrant increased focus on developing adequate culture supplements devoid of animal-derived products. In the present study, we have investigated the feasibility of umbilical cord blood-platelet lysate (UCB-PL) as a standard substitute for fetal bovine serum (FBS) and human peripheral blood-PL (PB-PL). MATERIALS AND METHODS: In this experimental study, platelet concentrates (PC) from UCB and human PB donors were frozen, melted, and sterilized to obtain PL...
October 2017: Cell Journal
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