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https://www.readbyqxmd.com/read/27917384/genetic-alterations-in-intervertebral-disc-disease
#1
REVIEW
Nikolay L Martirosyan, Arpan A Patel, Alessandro Carotenuto, M Yashar S Kalani, Evgenii Belykh, Corey T Walker, Mark C Preul, Nicholas Theodore
BACKGROUND: Intervertebral disc degeneration (IVDD) is considered a multifactorial disease that is influenced by both environmental and genetic factors. The last two decades of research strongly demonstrate that genetic factors contribute about 75% of the IVDD etiology. Recent total genome sequencing studies have shed light on the various single-nucleotide polymorphisms (SNPs) that are associated with IVDD. AIM: This review presents comprehensive and updated information about the diversity of genetic factors in the inflammatory, degradative, homeostatic, and structural systems involved in the IVDD...
2016: Frontiers in Surgery
https://www.readbyqxmd.com/read/27913258/an-experimental-study-on-the-effects-of-smoking-in-the-perinatal-period-and-during-lactation-on-the-intervertebral-discs-of-newborns
#2
Idiris Altun, Kasım Z Yuksel
OBJECTIVE: To evaluate the histopathological effects of smoking before, during and after pregnancy on the intervertebral disc structure of the newborns in an experimental rat model. METHODS: Seven adult female Wistar Albino rats were randomly allocated into 7 groups. Nicotine (2 mg/kg/day) was intraperitoneally introduced to these rats in 6 groups before, during and after pregnancy, while the rat in the control group received isotonic saline intraperitoneally. Fourteen newborns delivered by each rat were sacrificed at the end of 9 weeks after being breastfed for 3 weeks after birth...
November 29, 2016: World Neurosurgery
https://www.readbyqxmd.com/read/27903131/hypoxic-expansion-of-human-mesenchymal-stem-cells-enhances-3d-maturation-of-tissue-engineered-intervertebral-discs
#3
Katherine Deline Hudson, Lawrence J Bonassar
Culture of three dimensional (3D) constructs in hypoxic conditions (1-5% O2) has been shown to increase production of extracellular matrix (ECM) components in primary intervertebral disc (IVD) cells, and drive chondrogenesis of human mesenchymal stem cells (MSCs). Growing evidence that suggests that two dimensional (2D) expansion under hypoxic conditions may have an even greater influence on chondrogenesis in MSCs. This study aims to determine the effects of hypoxia during 2D expansion and subsequent 3D culture on the in vitro maturation of tissue engineering IVDs (TE-IVDs) made with human MSCs, using a previously developed TE-IVD system...
November 30, 2016: Tissue Engineering. Part A
https://www.readbyqxmd.com/read/27896778/lab-on-a-chip-multiplex-assays
#4
Harald Peter, Julia Wienke, Frank F Bier
Lab-on-a-chip multiplex assays allow a rapid identification of multiple parameters in an automated manner. Here we describe a lab-based preparation followed by a rapid and fully automated DNA microarray hybridization and readout in less than 10 min using the Fraunhofer in vitro diagnostics (ivD) platform to enable rapid identification of bacterial species and detection of antibiotic resistance. The use of DNA microarrays allows a fast adaptation of new biomarkers enabling the identification of different genes as well as single-nucleotide-polymorphisms (SNPs) within these genes...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/27893652/correlation-between-t2-t2-star-relaxation-time-and-cervical-intervertebral-disc-degeneration-an-observational-study
#5
Minghua Huang, Yong Guo, Qiong Ye, Lei Chen, Kai Zhou, Qingjun Wang, Lixin Shao, Qinglei Shi, Chun Chen
PURPOSE: To demonstrate the potential benefits of T2 relaxation time of intervertebral discs (IVDs) regarding the detection and grading of degenerative disc disease using 3.0-T magnetic resonance imaging (MRI) in a clinical setting. MATERIALS AND METHODS: Cervical sagittal T2-weighted, T2 relaxation MRI was performed at 3.0-T in 61 subjects, covering discs C2-3 to C6-7. All discs were morphologically assessed based on the Pfirrmann grade, and regions of interests (ROIs) were drawn over the T2 mapping...
November 2016: Medicine (Baltimore)
https://www.readbyqxmd.com/read/27885573/poly-%C3%AE-glutamic-acid-and-poly-%C3%AE-glutamic-acid-based-nanocomplexes-enhance-type-ii-collagen-production-in-intervertebral-disc
#6
Joana C Antunes, Catarina Leite Pereira, Graciosa Q Teixeira, Ricardo V Silva, Joana Caldeira, Sibylle Grad, Raquel M Gonçalves, Mário A Barbosa
Intervertebral disc (IVD) degeneration often leads to low back pain, which is one of the major causes of disability worldwide, affecting more than 80% of the population. Although available treatments for degenerated IVD decrease symptoms' progression, they fail to address the underlying causes and to restore native IVD properties. Poly(γ-glutamic acid) (γ-PGA) has recently been shown to support the production of chondrogenic matrix by mesenchymal stem/stromal cells. γ-PGA/chitosan (Ch) nanocomplexes (NCs) have been proposed for several biomedical applications, showing advantages compared with either polymer alone...
January 2017: Journal of Materials Science. Materials in Medicine
https://www.readbyqxmd.com/read/27884153/performance-evaluation-of-the-touchscreen-based-muse%C3%A2-auto-cd4-cd4-single-platform-system-for-cd4-t-cell-numeration-in-absolute-number-and-in-percentage-using-blood-samples-from-children-and-adult-patients-living-in-the-central-african-republic
#7
Christian Diamant Mossoro-Kpinde, André Kouabosso, Ralph-Sydney Mboumba Bouassa, Jean De Dieu Longo, Edouard Kokanzo, Rosine Féissona, Gérard Grésenguet, Laurent Bélec
BACKGROUND: The new microcapillary and fluorescence-based EC IVD-qualified Muse™ Auto CD4/CD4% single-platform assay (EMD Millipore Corporation, Merck Life Sciences, KGaA, Darmstadt, Germany) for CD4 T cell numeration in absolute number and in percentage was evaluated using Central African patients' samples compared against the reference EC IVD-qualified BD FACSCount (Becton-Dickinson, USA) flow cytometer. METHODS: EDTA-blood samples from 124 adults, 10 adolescents, 13 children and 3 infants were tested in parallel at 2 reference laboratories in Bangui...
November 25, 2016: Journal of Translational Medicine
https://www.readbyqxmd.com/read/27879577/potential-involvement-of-the-il-6-jak-stat3-pathway-in-the-pathogenesis-of-intervertebral-disc-degeneration
#8
Satoshi Suzuki, Nobuyuki Fujita, Takeshi Fujii, Kota Watanabe, Mitsuru Yagi, Takashi Tsuji, Ken Ishii, Takeshi Miyamoto, Keisuke Horiuchi, Masaya Nakamura, Morio Matsumoto
STUDY DESIGN: Laboratory study. OBJECTIVE: To elucidate the potential involvement of the Interleukin-6 (IL-6) / Janus kinase (JAK) / Signal Transducers and Activator of Transcription (STAT3) pathway in the development of intervertebral disc (IVD) degeneration. SUMMARY OF BACKGROUND DATA: IL-6 plays a crucial role in IVD degeneration; however, the downstream intracellular signaling of IL-6 in the IVD is not fully understood. METHODS: The expression levels of IL-6 and Suppressors of Cytokine Signaling 3 (SOCS3), a target gene of the IL-6/JAK/STAT3 pathway, were evaluated in rat and human degenerated IVD samples...
November 22, 2016: Spine
https://www.readbyqxmd.com/read/27876065/expression-of-adiponectin-receptors-in-human-and-rat-intervertebral-disc-cells-and-changes-in-receptor-expression-during-disc-degeneration-using-a-rat-tail-temporary-static-compression-model
#9
Yoshiki Terashima, Kenichiro Kakutani, Takashi Yurube, Toru Takada, Koichiro Maeno, Hiroaki Hirata, Shingo Miyazaki, Masaaki Ito, Yuji Kakiuchi, Yoshiki Takeoka, Ryosuke Kuroda, Kotaro Nishida
BACKGROUND: Adipose tissue is a large endocrine organ known to secret adiponectin, which has anti-diabetic, anti-atherogenic, and anti-inflammatory properties. Adiponectin is widely involved in systemic disease, diabetes mellitus, and cardiac infraction. This study aimed to investigate the involvement of adiponectin in intervertebral disc (IVD) degeneration. METHODS: Adipose and IVD tissues were obtained from human patients undergoing surgery (n = 4) and from skeletally mature Sprague-Dawley rats (n = 21)...
November 22, 2016: Journal of Orthopaedic Surgery and Research
https://www.readbyqxmd.com/read/27872846/effect-of-static-load-on-the-nucleus-pulposus-of-rabbit-intervertebral-disc-motion-segment-in-an-organ-culture
#10
Jia-Wen Zhan, Min-Shan Feng, Li-Guo Zhu, Ping Zhang, Jie Yu
The development of mechanically active culture systems helps in understanding of the role of mechanical stress in intervertebral disc (IVD) degeneration. Motion segment cultures facilitate the application and control of mechanical loads. The purpose of this study was to establish a culturing method for rabbit IVD motion segments to observe the effect of static load on the whole disc organ. Segments were cultured in custom-made apparatuses under a constant, compressive load (3 kg) for 2 weeks. Tissue integrity, matrix synthesis, and matrix gene expression profile were assessed and compared with fresh one...
2016: BioMed Research International
https://www.readbyqxmd.com/read/27871028/microstructure-analysis-method-for-evaluating-degenerated-intervertebral-disc-tissue
#11
Andrea Friedmann, Felix Goehre, Christopher Ludtka, Thomas Mendel, Hans-Joerg Meisel, Andreas Heilmann, Stefan Schwan
Degeneration of intervertebral disc (IVD) tissue is characterized by several structural changes that result in variations in disc physiology and loss of biomechanical function. The complex process of degeneration exhibits highly intercorrelated biomechanical, biochemical, and cellular interactions. There is currently some understanding of the cellular changes in degenerated intervertebral disc tissue, but microstructural changes and deterioration of the tissue matrix has previously been rarely explored. In this work, sequestered IVD tissue was successfully characterized using histology, light microscopy, and scanning electron microscopy (SEM) to quantitatively evaluate parameters of interest for intervertebral disc degeneration (IDD) such as delamination of the collagenous matrix, cell density, cell size, and extra cellular matrix (ECM) thickness...
October 21, 2016: Micron: the International Research and Review Journal for Microscopy
https://www.readbyqxmd.com/read/27869311/hypoxia-suppresses-serum-deprivation-induced-degradation-of-the-nucleus-pulposus-cell-extracellular-matrix-through-the-jnk-and-nf-%C3%AE%C2%BAb-pathways
#12
Jianru Wang, Hehai Pan, Xiang Li, Kuibo Zhang, Zemin Li, Hua Wang, Zhaomin Zheng, Hui Liu
Intervertebral disc (IVD) degeneration is associated with the imbalance between anabolism and catabolism of the nucleus pulposus (NP) extracellular matrix (ECM). Serum deprivation (SD) has been reported to exacerbate IVD degeneration; however, the effect of SD on ECM metabolism is not fully understood. Hypoxia plays important roles in maintaining the physiological functions of IVD cells; however, whether hypoxia has any effect on NP ECM production under conditions of SD is still unclear. In the current study, we established an in vitro SD model by exposing NP cells to serum-free medium...
November 21, 2016: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/27864283/tumor-necrosis-factor-%C3%AE-a-key-contributor-to-intervertebral-disc-degeneration
#13
REVIEW
Cheng Wang, Xiaohua Yu, Yiguo Yan, Wei Yang, Shujun Zhang, Yongxiao Xiang, Jian Zhang, Wenjun Wang
Intervertebral disc (IVD) degeneration (IDD) is the most common cause leading to low back pain (LBP), which is a highly prevalent, costly, and crippling condition worldwide. Current treatments for IDD are limited to treat the symptoms and do not target the pathophysiology. Tumor necrosis factor-α (TNF-α) is one of the most potent pro-inflammatory cytokines and signals through its receptors TNFR1 and TNFR2. TNF-α is highly expressed in degenerative IVD tissues, and it is deeply involved in multiple pathological processes of disc degeneration, including matrix destruction, inflammatory responses, apoptosis, autophagy, and cell proliferation...
November 17, 2016: Acta Biochimica et Biophysica Sinica
https://www.readbyqxmd.com/read/27858401/intervertebral-disc-degeneration-ectopic-calcification-advanced-glycation-end-products-nucleus-pulposus-cells
#14
S Illien-Jünger, O M Torre, W F Kindschuh, X Chen, D M Laudier, J C Iatridis
Ectopic calcifications in intervertebral discs (IVDs) are known characteristics of IVD degeneration that are not commonly reported but may be implicated in structural failure and dysfunctional IVD cell metabolic responses. This study investigated the novel hypothesis that ectopic calcifications in the IVD are associated with advanced glycation end products (AGEs) via hypertrophy and osteogenic differentiation. Histological analyses of human IVDs from several degeneration stages revealed areas of ectopic calcification within the nucleus pulposus and at the cartilage endplate...
November 18, 2016: European Cells & Materials
https://www.readbyqxmd.com/read/27853661/cell-therapy-with-human-dermal-fibroblasts-enhances-intervertebral-disk-repair-and-decreases-inflammation-in-the-rabbit-model
#15
Ana Chee, Peng Shi, Thomas Cha, Ting-Hsien Kao, Shu-Hua Yang, Jun Zhu, Ding Chen, Yejia Zhang, Howard S An
Study Design Pilot study using the rabbit model. Objective Low back pain is often associated with disk degeneration. Cell therapy for degenerating disks may promote tissue regeneration and repair. Human dermal fibroblasts, obtained from the patient's skin tissue or donated tissue, may be a promising cell therapy option for degenerating disks. The objective of these studies is to determine the effects of intradiscal transplantation of neonatal human dermal fibroblasts (nHDFs) on intervertebral disk (IVD) degeneration by measuring disk height, magnetic resonance imaging (MRI) signal intensity, gene expression, and collagen immunostaining...
December 2016: Global Spine Journal
https://www.readbyqxmd.com/read/27853274/acidic-ph-promotes-intervertebral-disc-degeneration-acid-sensing-ion-channel-3-as-a-potential-therapeutic-target
#16
Hamish T J Gilbert, Nathan Hodson, Pauline Baird, Stephen M Richardson, Judith A Hoyland
The aetiology of intervertebral disc (IVD) degeneration remains poorly understood. Painful IVD degeneration is associated with an acidic intradiscal pH but the response of NP cells to this aberrant microenvironmental factor remains to be fully characterised. The aim here was to address the hypothesis that acidic pH, similar to that found in degenerate IVDs, leads to the altered cell/functional phenotype observed during IVD degeneration, and to investigate the involvement of acid-sensing ion channel (ASIC) -3 in the response...
November 17, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27848245/inflammatory-mediators-and-signalling-pathways-controlling-intervertebral-disc-degeneration
#17
REVIEW
Stefania Elena Navone, Giovanni Marfia, Amedeo Giannoni, Matteo Beretta, Laura Guarnaccia, Roberta Gualtierotti, Daniele Nicoli, Paolo Rampini, Rolando Campanella
Intervertebral disc (IVD) degeneration (IDD) is one of the major causes of back pain, a condition that represents a serious socio-economic burden. Deeper knowledge of the complex and fine relationship between IVD degeneration, tissue inflammation and pain, appears to be critical to improve the current therapies, which have so far proven themselves ineffective. Upon degeneration, IVD tissues become inflamed, and this inflammatory microenvironment is associated with a cascade of degenerative events that may eventually cause discogenic pain...
November 16, 2016: Histology and Histopathology
https://www.readbyqxmd.com/read/27837499/commercial-molecular-tests-for-fungal-diagnosis-from-a-practical-point-of-view
#18
Michaela Lackner, Cornelia Lass-Flörl
The increasing interest in molecular diagnostics is a result of tremendously improved knowledge on fungal infections in the past 20 years and the rapid development of new methods, in particular polymerase chain reaction. High expectations have been placed on molecular diagnostics, and the number of laboratories now using the relevant technology is rapidly increasing-resulting in an obvious need for standardization and definition of laboratory organization. In the past 10 years, multiple new molecular tools were marketed for the detection of DNA, antibodies, cell wall components, or other antigens...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/27830029/cellular-mechanical-properties-reflect-the-differentiation-potential-of-nucleus-pulposus-derived-progenitor-cells
#19
Ming-Han Liu, You-Hong Cui, Yue Zhou
Mechanical properties of cells reflect differences in cellular subpopulations, differentiation potency, and cell behaviors. Previous study has revealed that intervertebral disc (IVD) degeneration leads to alterations in cell behavior and differentiation potency. Human nucleus pulposus-derived progenitor cells (NPPCs) are an attractive cell sources for IVD regeneration. However, the relationship between mechanical properties and differentiation potential in different NPPC subpopulations is few known. In this study, mechanical properties of different NPPC subpopulations were measured via atomic force microscopy (AFM) and correlated with differentiation potential of NPPCs...
2016: American Journal of Translational Research
https://www.readbyqxmd.com/read/27829314/bone-morphogenetic-protein-2-but-not-mesenchymal-stromal-cells-exert-regenerative-effects-on-canine-and-human-nucleus-pulposus-cells
#20
Frances Bach, Alberto Miranda-Bedate, Ferdi van Heel, Frank Riemers, Margot Muller, Laura Creemers, Keita Ito, Karin Benz, Björn Meij, M Tryfonidou
Chronic back pain is related to intervertebral disc (IVD) degeneration and dogs are employed as animal models to develop growth factor- and cell-based regenerative treatments. In this respect, the differential effects of transforming growth factor beta-1 (TGF-β1) and bone morphogenetic protein-2 (BMP2) on canine and human chondrocyte-like cells (CLCs) derived from the nucleus pulposus of degenerated IVDs were studied. Human and canine CLCs were cultured in 3D micro-aggregates in basal culture medium supplemented with/without TGF-β1 (10 ng/mL) or BMP2 (100 or 250 ng/mL)...
November 9, 2016: Tissue Engineering. Part A
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