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Intervertebral Disc Mechanics

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https://www.readbyqxmd.com/read/29152560/effects-of-inflammation-on-multiscale-biomechanical-properties-of-cartilaginous-cells-and-tissues
#1
REVIEW
Q T Nguyen, T D Jacobsen, N O Chahine
Cells within cartilaginous tissues are mechanosensitive and thus require mechanical loading for regulation of tissue homeostasis and metabolism. Mechanical loading plays critical roles in cell differentiation, proliferation, biosynthesis, and homeostasis. Inflammation is an important event occurring during multiple processes, such as aging, injury, and disease. Inflammation has significant effects on biological processes as well as mechanical function of cells and tissues. These effects are highly dependent on cell/tissue type, timing, and magnitude...
November 13, 2017: ACS Biomaterials Science & Engineering
https://www.readbyqxmd.com/read/29150639/in-vitro-maturation-and-in-vivo-integration-and-function-of-an-engineered-cell-seeded-disc-like-angle-ply-structure-daps-for-total-disc-arthroplasty
#2
J T Martin, S E Gullbrand, D H Kim, K Ikuta, C G Pfeifer, B G Ashinsky, L J Smith, D M Elliott, H E Smith, R L Mauck
Total disc replacement with an engineered substitute is a promising avenue for treating advanced intervertebral disc disease. Toward this goal, we developed cell-seeded disc-like angle ply structures (DAPS) and showed through in vitro studies that these constructs mature to match native disc composition, structure, and function with long-term culture. We then evaluated DAPS performance in an in vivo rat model of total disc replacement; over 5 weeks in vivo, DAPS maintained their structure, prevented intervertebral bony fusion, and matched native disc mechanical function at physiologic loads in situ...
November 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29133001/effects-of-low-bone-mineral-status-on-biomechanical-characteristics-in-idiopathic-scoliotic-spinal-deformity
#3
Xiao-Xing Song, Lin-Yu Jin, Xin-Feng Li, Lie Qian, Hong-Xing Shen, Zu-De Liu, Bu-Wei Yu
BACKGROUND: Low bone mass in adolescent idiopathic scoliosis patients has been well reported. Poor bone quality was regarded as a new and unique prognostic factor in aggravating the curve progression. However, the potential biomechanical correlation between them remains unclear. METHODS: Three-dimensional finite element models of idiopathic scoliotic spine with different bone mineral status were created for axial loading simulation. Axial load of three different body weights were applied on different bone mineral mass models...
November 10, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/29131030/n-cadherin-mediated-activation-of-pi3k-akt-gsk-3%C3%AE-signaling-attenuates-nucleus-pulposus-cell-apoptosis-under-high-magnitude-compression
#4
Pei Li, Zherui Liang, Gang Hou, Lei Song, Ruijie Zhang, Yibo Gan, Chengmin Zhang, Yichun Xu, Qiang Zhou
BACKGROUND/AIMS: Mechanical overloading-induced nucleus pulposus (NP) apoptosis plays an important role in the pathogenesis of intervertebral disc degeneration. N-cadherin (N-CDH)-mediated signaling preserves normal NP cell phenotype. This study aims to investigate the effects of N-CDH on NP cell apoptosis under high-magnitude compression and the underlying mechanism behind this process. METHODS: Rat NP cells seeded on scaffold were perfusion-cultured using a self-developed perfusion bioreactor for 5 days and experienced different magnitudes (2% and 20% compressive deformation, respectively) of compression at a frequency of 1...
November 9, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/29115481/sparstolonin-b-prevents-lumbar-intervertebral-disc-degeneration-through-toll-like-receptor-4-nadph-oxidase-activation-and-the-protein-kinase-b-signaling-pathway
#5
Jianhua Ge, Long Chen, Yunkang Yang, Xiaobo Lu, Zhou Xiang
Intervertebral disc degeneration (IVDD) is the most common pathogeny of lumbago. It is the pathological basis for a series of spinal degenerative diseases. For a long time, the diagnosis and treatment of lumbago have rendered difficult, since the pathogeny has not been identified. Therefore, the present study aimed to investigate the protective effect of Sparstolonin B in preventing lumbar intervertebral disc degeneration, and explored its potential mechanism in rats. Firstly, Sparstolonin B effectively reduced the histological score of disc degeneration and increased endplate porosity of L2 superior endplates in a lumbar IVDD rat model...
November 6, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29105592/biologic-annulus-fibrosus-repair-a-review-of-preclinical-in-vivo-investigations
#6
Stephen Rogers Sloan, Marianne Lintz, Ibrahim Hussain, Roger Härtl, Lawrence J Bonassar
Lower back pain, the leading cause of workplace absences and disability, is often attributed to intervertebral disc (IVD) degeneration in which nucleus pulposus (NP) herniates through lesions in the annulus fibrosus (AF) and impinges on the spinal cord and surrounding nerves. Surgeons remove extruded NP via discectomy when indicated by local/radicular pain supported by radiographic evidence, however current interventions do not alter the underlying disease or seal the AF. The reported rates of recurrent herniation or pain following discectomy cases range from 5-25%, which has pushed spine research in recent years towards annular repair and closure strategies...
November 4, 2017: Tissue Engineering. Part B, Reviews
https://www.readbyqxmd.com/read/29097182/comparison-of-nucleus-pulposus-stem-progenitor-cells-isolated-from-degenerated-intervertebral-discs-with-umbilical-cord-derived-mesenchymal-stem-cells
#7
Hao Wu, Xiaoli Zeng, Jiayue Yu, Yupan Shang, Mei Tu, Lek Hang Cheang, Jiaqing Zhang
Mesenchymal stem-cell based therapies have been proposed as novel treatments for intervertebral disc (IVD) degeneration. The development of these treatment strategies, however, has been hindered by the incomplete understanding of the origin, biological properties of nucleus pulposus (NP) derived stem/progenitor cells and their effects on the IVD degeneration. The goal of this study is to explore the biological properties of NP stem/progenitor cells isolated from degenerated IVD (D-NPMSCs) regarding immunotype, proliferative capacity, multi-lineage differentiation abilities, and the expression of NP specific cell surface markers compared to human umbilical cord mesenchymal stem cells (UCMSCs)...
October 31, 2017: Experimental Cell Research
https://www.readbyqxmd.com/read/29096981/osmosis-and-viscoelasticity-both-contribute-to-time-dependent-behaviour-of-the-intervertebral-disc-under-compressive-load-a-caprine-in-vitro-study
#8
Kaj S Emanuel, Albert J van der Veen, Christine M E Rustenburg, Theodoor H Smit, Idsart Kingma
The mechanical behaviour of the intervertebral disc highly depends on the content and transport of interstitial fluid. It is unknown, however, to what extent the time-dependent behaviour can be attributed to osmosis. Here we investigate the effect of both mechanical and osmotic loading on water content, nucleus pressure and disc height. Eight goat intervertebral discs, immersed in physiological saline, were subjected to a compressive force with a pressure needle inserted in the nucleus. The loading protocol was: 10 N (6 h); 150 N (42 h); 10 N (24 h)...
October 25, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/29080003/percutaneous-posterolateral-approach-for-the-simulation-of-a-far-lateral-disc-herniation-in-an-ovine-model
#9
Stefan Schwan, Christopher Ludtka, Ingo Wiesner, Andre Baerthel, Andrea Friedmann, Felix Göhre
PURPOSE: This work describes a minimally invasive damage model for ovine lumbar discs via partial nucleotomy using a posterolateral approach. METHODS: Two cadavers were dissected to analyze the percutaneous corridor. Subsequently, 28 ovine had their annulus fibrosus punctured via awl penetration under fluoroscopic control and nucleus pulposus tissue removed via rongeur. Efficacy was assessed by animal morbidity, ease of access to T12-S1 disc spaces, and production of a mechanical injury as verified by discography, radiography, and histology...
October 27, 2017: European Spine Journal
https://www.readbyqxmd.com/read/29074297/hierarchical-imbalanced-pro-inflammatory-cytokine-networks-govern-the-pathogenesis-of-chronic-arthropathies
#10
REVIEW
G Livshits, A Kalinkovich
BACKGROUND: Chronic inflammatory arthropathies, such as rheumatoid arthritis (RA), spondyloarthritis, including psoriatic arthritis (PsA), ankylosing spondyloarthritis (AS), osteoarthritis (OA), and intervertebral disc degenerative disease (DDD) constitute major public health problems that are anticipated to grow significantly as the human population ages. However, many aspects concerning the molecular mechanisms underlying their onset and progression remain unclear. DESIGN: This narrative review critically analyzes the molecular mechanisms underlying the inflammation-associated pathogenesis of the aforementioned joint diseases...
October 24, 2017: Osteoarthritis and Cartilage
https://www.readbyqxmd.com/read/29072013/-effects-of-chiropractics-on-intervertebral-disk-extracell-matrix-and-metabolic-enzymes-in-rats-with-cervical-spondylosis
#11
Li-Shan Huang, Ping-Ping Huang, Xiu-Bing Tong, Zhong-Li Li, Yan-Ping Fang, Jun Liao
OBJECTIVE: To observe the effect of chiropractics on intervertebral disk extracell matrix metalloproteinase (MMP)-1, MMP-3, MMP-13, cellular collagen type Ⅱ (COL-Ⅱ), tissue inhibitor 1 of metalloproteinase (TIMP-1) and extracellular matrix (ECM) in the rats with cervical spondylosis, so as to explore its mechanism underlying improvement of cervical spondylosis. METHODS: A total of 40 SD rats were randomized into a sham group, a model group, a chiropractics group and a mobic group, 8 rats in each one...
August 25, 2017: Zhen Ci Yan Jiu, Acupuncture Research
https://www.readbyqxmd.com/read/29072008/-effect-of-nape-seven-needles-on-expression-of-dll-4-and-hes-1-in-cervical-intervertebral-disc-degeneration-rats
#12
Yan Lu, Qing-Si Shen, Meng Tian, Hong-Ling Jia, Yong-Chen Zhang
OBJECTIVE: To observe the effect of "Nape Seven Needles" on the expressions of Delta-like ligand 4 (Dll 4) and hairy and enhancer of split homolog 1(Hes 1) in cervical intervertebral disc degeneration(IVDD) rats, so as to explore its mechanism of deferring the degeneration of cervical intervertebral disc. METHODS: SD male rats were randomly divided into a normal group, a model group and a nape seven needles group (n=11 in each group). The IVDD model was established by static-dynamic imbalance method...
August 25, 2017: Zhen Ci Yan Jiu, Acupuncture Research
https://www.readbyqxmd.com/read/29067127/inhibition-of-mir-27a-suppresses-the-inflammatory-response-via-the-p38-mapk-pathway-in-intervertebral-disc-cells
#13
Zhenguo Cao, Liang Chen
The current study aimed to investigate the role of miR-27a in intervertebral disc degeneration (IDD) and to examine the underlying mechanisms. Quantitative polymerase chain reaction (qPCR) was performed to detect the expression level of miR-27a in the nucleus pulposus (NP) tissues of patients with IDD, and the results revealed an increasing expression of miR-27a in IDD compared with the control. To further investigate the role of miR-27a in IDD, a stable human NP cell line with low miR-27a expression was generated by transfecting cells with a lentiviral antigomiR-27a inhibitor...
November 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29065144/substantial-vertebral-body-osteophytes-protect-against-severe-vertebral-fractures-in-compression
#14
Eric Wagnac, Carl-Éric Aubin, Kathia Chaumoître, Jean-Marc Mac-Thiong, Anne-Laure Ménard, Yvan Petit, Anaïs Garo, Pierre-Jean Arnoux
Recent findings suggest that vertebral osteophytes increase the resistance of the spine to compression. However, the role of vertebral osteophytes on the biomechanical response of the spine under fast dynamic compression, up to failure, is unclear. Seventeen human spine specimens composed of three vertebrae (from T5-T7 to T11-L1) and their surrounding soft tissues were harvested from nine cadavers, aged 77 to 92 years. Specimens were imaged using quantitative computer tomography (QCT) for medical observation, classification of the intervertebral disc degeneration (Thomson grade) and measurement of the vertebral trabecular density (VTD), height and cross-sectional area...
2017: PloS One
https://www.readbyqxmd.com/read/29064532/a-review-of-the-application-of-reinforced-hydrogels-and-silk-as-biomaterials-for-intervertebral-disc-repair
#15
D A Frauchiger, A Tekari, M Wöltje, G Fortunato, L M Benneker, B Gantenbein
The degeneration of the intervertebral disc (IVD) within the spinal column represents a major pain source for many patients. Biological restoration or repair of the IVD using "compressive-force-resistant" and at the same time "cytocompatible" materials would be desirable over current purely mechanical solutions, such as spinal fusion or IVD implants. This review provides an overview of recent research on the repair of the inner (nucleus pulposus = NP) and the outer (annulus fibrous = AF) parts of the IVD tissue...
October 24, 2017: European Cells & Materials
https://www.readbyqxmd.com/read/29063365/intervertebral-disc-degeneration-an-experimental-and-numerical-study-using-a-rabbit-model
#16
Andrea Calvo-Echenique, José Cegoñino, Laura Correa-Martín, Luciano Bances, Amaya Pérez-Del Palomar
Animal models have been extensively used for the study of degenerative diseases and evaluation of new therapies to stop or even reverse the disease progression. The aim of this study is to reproduce lumbar intervertebral disc degeneration in a rabbit model by performing a percutaneous annular puncture at L4L5 level. The effect of this damage on the spine behaviour was analysed combining three different techniques: imaging processing, mechanical testing and computational modelling. Twenty New Zealand white rabbits were divided into control and experimental groups and followed up during 6 months...
October 23, 2017: Medical & Biological Engineering & Computing
https://www.readbyqxmd.com/read/29057356/anterior-cervical-spine-surgery-associated-complications-in-a-retrospective-case-control-study
#17
REVIEW
Anastasia Tasiou, Theofanis Giannis, Alexandros G Brotis, Ioannis Siasios, Iordanis Georgiadis, Haralampos Gatos, Eleni Tsianaka, Konstantinos Vagkopoulos, Konstantinos Paterakis, Kostas N Fountas
Anterior cervical spine procedures have been associated with satisfactory outcomes. However, the occurrence of troublesome complications, although uncommon, needs to be taken into consideration. The purpose of our study was to assess the actual incidence of anterior cervical spine procedure-associated complications and identify any predisposing factors. A total of 114 patients undergoing anterior cervical procedures over a 6-year period were included in our retrospective, case-control study. The diagnosis was cervical radiculopathy, and/or myelopathy due to degenerative disc disease, cervical spondylosis, or traumatic cervical spine injury...
September 2017: Journal of Spine Surgery (Hong Kong)
https://www.readbyqxmd.com/read/29053719/total-disc-replacement-using-tissue-engineered-intervertebral-discs-in-the-canine-cervical-spine
#18
Yu Moriguchi, Jorge Mojica-Santiago, Peter Grunert, Brenton Pennicooke, Connor Berlin, Thamina Khair, Rodrigo Navarro-Ramirez, Rodolfo J Ricart Arbona, Joseph Nguyen, Roger Härtl, Lawrence J Bonassar
The most common reason that adults in the United States see their physician is lower back or neck pain secondary to degenerative disc disease. To date, approaches to treat degenerative disc disease are confined to purely mechanical devices designed to either eliminate or enable flexibility of the diseased motion segment. Tissue engineered intervertebral discs (TE-IVDs) have been proposed as an alternative approach and have shown promise in replacing native IVD in the rodent tail spine. Here we demonstrate the efficacy of our TE-IVDs in the canine cervical spine...
2017: PloS One
https://www.readbyqxmd.com/read/29042621/postnatal-development-of-the-murine-notochord-remnants-quantified-by-high-resolution-contrast-enhanced-microct
#19
Sameer Bhalla, Kevin H Lin, Simon Y Tang
The notochord gives rise to spinal segments during development, and it becomes embedded within the nucleus pulposus of the intervertebral disc (IVD) during maturation. The disruption of the notochord band has been observed with IVD degeneration. Since the mechanical competence of the IVD relies on its structural constituents, defining the structure of the notochord during aging is critical for investigations relating to IVD function and homeostasis. The assessment and imaging of the notochord has classically relied on histological techniques, which introduces sectioning artifacts during preparation and spatial biases...
October 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29039595/caveolin%C3%A2-1-regulates-oxidative-stress%C3%A2-induced-senescence-in-nucleus-pulposus-cells-primarily-via-the-p53-p21-signaling-pathway-in%C3%A2-vitro
#20
Lei Ding, Qingmin Zeng, Jingping Wu, Defang Li, Houlei Wang, Wei Lu, Zengxin Jiang, Guoxiong Xu
Previous studies have indicated that cellular senescence is a critical underlying mechanism of intervertebral disc degeneration. However, the precise mechanism by which cellular senescence accelerates disc degeneration has not been fully elucidated. Caveolin‑1 has recently emerged as an important regulator of cellular senescence. Therefore, the aim of the present study was to investigate whether caveolin‑1 is involved in nucleus pulposus (NP) cellular senescence during oxidative stress. PCR was used to detect caveolin‑1 mRNA expression and protein expression was detected by western blotting...
December 2017: Molecular Medicine Reports
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