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https://www.readbyqxmd.com/read/29164771/functional-self-assembled-peptide-scaffold-inhibits-tnf-alpha-induced-inflammation-and-apoptosis-in-nucleus-pulposus-cells-by-suppressing-nf-%C3%AE%C2%BAb-signaling
#1
Xiaochuan Li, Shi Cheng, Yaohong Wu, Jingwei Ying, Chaofeng Wang, Tianyong Wen, Xuedong Bai, Wei Ji, Deli Wang, Dike Ruan
Although nucleus pulposus (NP) tissue engineering has achieved tremendous success, researches still face the huge obstacles in maintaining cell survival and function. A novel functional self-assembled peptide RADA-KPSS was constructed by conjugating BMP-7 short active fragment (KPSS) to the C-terminus of RADA16-I that displays anti-inflammatory and anti-apoptosis effects. However, whether this functional self-assembled RADA-KPSS peptide can alleviate inflammation and NPC apoptosis induced by TNF-α has not been studied...
November 22, 2017: Journal of Biomedical Materials Research. Part A
https://www.readbyqxmd.com/read/29162138/predictability-of-the-effects-of-facet-joint-infiltration-in-the-degenerate-lumbar-spine-when-assessing-mri-scans
#2
Ulf Krister Hofmann, Ramona Luise Keller, Christian Walter, Falk Mittag
BACKGROUND: Imaging results are frequently considered as hallmarks of disease by spine surgeons to plan their future treatment strategy. Numerous classification systems have been proposed to quantify or grade lumbar magnetic resonance imaging (MRI) scans and thus objectify imaging findings. The clinical impact of the measured parameters remains, however, unclear. To evaluate the pathological significance of imaging findings in patients with multisegmental degenerative findings, clinicians can perform image-guided local infiltrations to target defined areas such as the facet joints...
November 21, 2017: Journal of Orthopaedic Surgery and Research
https://www.readbyqxmd.com/read/29162082/spatial-geometric-and-magnetic-resonance-signal-intensity-changes-with-advancing-stages-of-nucleus-pulposus-degeneration
#3
Shu-Hua Yang, Alejandro A Espinoza Orías, Chien-Chou Pan, Issei Senoo, Gunnar B J Andersson, Howard S An, Nozomu Inoue
BACKGROUND: With advancing stages of degeneration, denaturation and degradation of proteoglycans in the nucleus pulposus (NP) lead to tissue dehydration and signal intensity loss on T2-weighted MR images. Pfirrmann grading is widely used for grading degeneration of intervertebral discs (IVDs). The criterion to differentiate IVDs of Pfirrmann Grade I from the other grades is NP homogeneity. Pfirrmann grading is qualitative and its assessment may be subjective. Therefore, assessment of quantitative objective measures correlating with early disc degeneration may complement the grading...
November 21, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/29157342/molecular-biological-effects-of-weightlessness-and-hypergravity-on-intervertebral-disc-degeneration
#4
Di Wu, Chao Zheng, Ji Wu, Rongrong Huang, Xuanyu Chen, Tong Zhang, Lili Zhang
INTRODUCTION: The rate of intervertebral disc degeneration (IVDD) is influenced by environmental factors. Extracellular matrix (ECM) destruction and apoptosis of intervertebral disc cells are major characteristics of IVDD. ECM degradation is closely linked to up-regulation of matrix metalloproteinases (MMPs) and tissue inhibitors of MMPs (TIMP). This study aimed to elucidate the molecular biological changes during IVDD under conditions of weightlessness and hypergravity. METHODS: A total of 120 rabbits were divided randomly into four groups: control group, weightlessness group, hypergravity group, and mixed (hypergravity + weightlessness) group...
December 1, 2017: Aerospace Medicine and Human Performance
https://www.readbyqxmd.com/read/29156793/methylation-of-microrna-129-5p-modulates-nucleus-pulposus-cell-autophagy-by-targeting-beclin-1-in-intervertebral-disc-degeneration
#5
Kangcheng Zhao, Yukun Zhang, Liang Kang, Yu Song, Kun Wang, Shuai Li, Xinghuo Wu, Wenbin Hua, Zengwu Shao, Shuhua Yang, Cao Yang
MicroRNAs play an important role in the etiology and progression of many diseases, including intervertebral disc degeneration (IVDD). The miRNA miR-129-5P regulates autophagy in various cancers, but its role in human nucleus pulposus (NP) cells is unclear. The present study investigated whether miR-129-5p regulates the expression of Beclin-1 which is known to induce autophagy in NP cells by evaluating their levels in normal and degenerative disc tissues and human NP cells transfected with miR-129-5P mimic or inhibitor by quantitative real-time (qRT-)PCR, western blotting, flow cytometry, and immunofluorescence analysis...
October 17, 2017: Oncotarget
https://www.readbyqxmd.com/read/29150945/development-of-an-in-vivo-mouse-model-of-discogenic-low-back-pain
#6
Changgui Shi, Vaskar Das, Xin Li, Ranjan Kc, Sujun Qiu, InSug O-Sullivan, Richard L Ripper, Jeffrey S Kroin, Fackson Mwale, Atiyayein A Wallace, Bingqian Zhu, Lan Zhao, Andre J van Wijnen, Mingliang Ji, Jun Lu, Gina Votta-Velis, Wen Yuan, Hee-Jeong Im
Discogenic Low back pain (DLBP) is extremely common and costly. Effective treatments are lacking due to DLBP's unknown pathogenesis. Currently, there are no in vivo mouse models of DLBP, which restricts research in this field. The aim of this study was to establish a reliable DLBP model in mouse that captures the pathological changes in the disc and allows longitudinal pain testing. The model was generated by puncturing the mouse lumbar discs (L4/5, L5/6, and L6/S1) and removing the nucleus pulposus using a microscalpel under the microscope...
November 18, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/29147797/is-it-appropriate-to-measure-age-related-lumbar-disc-degeneration-on-the-mid-sagittal-mr-image-a-quantitative-image-study
#7
Xiaojian Hu, Mingjian Chen, Jianjiang Pan, Liang Liang, Yue Wang
PURPOSE: Even though phenotypes of disc degeneration vary on different sagittal magnetic resonance images (MRI), measurements typically are acquired on the mid-sagittal MRI. This study investigated the appropriateness of using the mid-sagittal MRI to measure various phenotypes of age-related disc degeneration. METHODS: Lumbar spine MRIs of 66 subjects (mean age 50.3 years, standard deviation 16.5 years, range 22-84 years) were studied. An image analysis program Spine Explorer was used to obtain quantitative measurements for disc height, bulging, and signal on para- and mid-sagittal T2-weighted MRIs...
November 17, 2017: European Spine Journal
https://www.readbyqxmd.com/read/29147669/cervical-intervertebral-disc-degeneration-and-low-cervical-extension-independently-associated-with-a-history-of-stinger-syndrome
#8
Takayoshi Hakkaku, Koichi Nakazato, Koji Koyama, Karina Kouzaki, Kenji Hiranuma
Background: Stinger syndrome frequently occurs in athletes who compete in collision sports. Sharp pain and impairment of neck motion are major symptoms. Cervical intervertebral disc degeneration (CIDD) is also frequently observed in those who compete in collision sports. Purpose/Hypothesis: To investigate whether CIDD and neck functionality are related to a history of stinger syndrome. The hypothesis was that a significant relationship exists between CIDD and neck motion and a history of stinger syndrome in Japanese collegiate football players...
November 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/29147462/oxygen-sensing-nox4-generates-genotoxic-ros-to-induce-premature-senescence-of-nucleus-pulposus-cells-through-mapk-and-nf-%C3%AE%C2%BAb-pathways
#9
Chencheng Feng, Yang Zhang, Minghui Yang, Minghong Lan, Huan Liu, Bo Huang, Yue Zhou
Senescence is a crucial driver of intervertebral disc degeneration (IDD). Disc cells are exposed to high oxygen tension due to neovascularization in degenerative discs. However, the effect of oxygen tension on disc cell senescence was unknown. Herein, rat nucleus pulposus (NP) cells were cultured under 20% O2 or 1% O2. Consequently, ROS induced by 20% O2 caused DNA damage and then activated p53-p21-Rb and p16-Rb pathways via ERK signaling to induce NP cell senescence. It also induced catabolic and proinflammatory phenotype of NP cells via MAPK and NF-κB pathways...
2017: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/29145636/localization-and-functional-characterization-of-the-p-asn965ser-n965s-abca4-variant-in-mice-reveal-pathogenic-mechanisms-underlying-stargardt-macular-degeneration
#10
Laurie L Molday, Daniel Wahl, Marinko Sarunic, Robert S Molday
ABCA4 is a member of the superfamily of ATP-binding cassette (ABC) proteins that transports N-retinylidene-phosphatidylethanolamine (N-Ret-PE) across outer segment disc membranes thereby facilitating the removal of potentially toxic retinoid compounds from photoreceptor cells. Mutations in the gene encoding ABCA4 are responsible for Stargardt disease (STGD1), an autosomal recessive retinal degenerative disease that causes severe vision loss. To define the molecular basis for STGD1 associated with the p.Asn965Ser (N965S) mutation in the Walker A motif of nucleotide binding domain 1 (NBD1), we generated a p...
November 14, 2017: Human Molecular Genetics
https://www.readbyqxmd.com/read/29145437/assessment-of-the-suitability-of-biodegradable-rods-for-use-in-posterior-lumbar-fusion-an-in-vitro-biomechanical-evaluation-and-finite-element-analysis
#11
Fon-Yih Tsuang, Yueh-Ying Hsieh, Yi-Jie Kuo, Chia-Hsien Chen, Feng-Huei Lin, Chen-Sheng Chen, Chang-Jung Chiang
Interbody fusion with posterior instrumentation is a common method for treating lumbar degenerative disc diseases. However, the high rigidity of the fusion construct may produce abnormal stresses at the adjacent segment and lead to adjacent segment degeneration (ASD). As such, biodegradable implants are becoming more popular for use in orthopaedic surgery. These implants offer sufficient stability for fusion but at a reduced stiffness. Tailored to degrade over a specific timeframe, biodegradable implants could potentially mitigate the drawbacks of conventional stiff constructs and reduce the loading on adjacent segments...
2017: PloS One
https://www.readbyqxmd.com/read/29142627/a-comparison-of-anterior-cervical-discectomy-and-fusion-versus-fusion-combined-with-artificial-disc-replacement-for-treating-3-level-cervical-spondylotic-disease
#12
Seo-Ryang Jang, Sang-Bok Lee, Kyoung-Suok Cho
Objective: The purpose of this study is to evaluate the efficacy and safety of 3-level hybrid surgery (HS), which combines fusion and cervical disc replacement (CDR), compared to 3-level fusionin patient with cervical spondylosis involving 3 levels. Methods: Patients in the anterior cervical discectomy and fusion (ACDF) group (n=30) underwent 3-level fusion and the HS group (n=19) underwent combined surgery with fusion and CDR. Clinical outcomes were evaluated using the visual analogue scale for the arm, the neck disability index (NDI), Odom criteria and postoperative complications...
November 2017: Journal of Korean Neurosurgical Society
https://www.readbyqxmd.com/read/29141001/the-associations-between-magnetic-resonance-imaging-findings-and-low-back-pain-a-10-year-longitudinal-analysis
#13
Juichi Tonosu, Hiroyuki Oka, Akiro Higashikawa, Hiroshi Okazaki, Sakae Tanaka, Ko Matsudaira
PURPOSE: To conduct a 10-year longitudinal analysis of the relationship between magnetic resonance imaging (MRI) findings and low back pain (LBP). MATERIALS AND METHODS: Ninety-one volunteers with a history of LBP, but without current LBP were recruited between 2005 and 2006. Participants' baseline demographics and MRI findings were recorded. All volunteers were invited for a follow-up MRI in 2016; of these, 49 volunteers (53.8%) participated in the follow-up. We enquired whether they had LBP history during the 10 years between the baseline and follow-up examinations...
2017: PloS One
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
#14
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/29128087/-platelet-rich-plasma-prp-and-disc-lesions-a-review-of-the-literature
#15
REVIEW
L Charneux, C Demoulin, M Vanderthomment, M Tomasella, M-A Ferrara, S Grosdent, S Bethlen, R Fontaine, P Gillet, T Racaru, J-F Kaux
The spine has been the subject of extensive clinical research since it is the source of many painful complaints. However, there is little scientific evidence concerning the therapeutic proposals. During the course of life, the intervertebral disc degenerates, which over time diminishes its damping capacity and facilitates the expulsion of the nucleus pulposus through the annulus fibrosus. The degeneration of the intervertebral disc (DDI) is the origin of some back pain and various specific treatments have been developed...
November 8, 2017: Neuro-Chirurgie
https://www.readbyqxmd.com/read/29122605/phenotypic-characterization-of-p23h-and-s334ter-rhodopsin-transgenic-rat-models-of-inherited-retinal-degeneration
#16
Matthew M LaVail, Shimpei Nishikawa, Roy H Steinberg, Muna I Naash, Jacque L Duncan, Nikolaus Trautmann, Michael T Matthes, Douglas Yasumura, Cathy Lau-Villacorta, Jeannie Chen, Ward M Peterson, Haidong Yang, John G Flannery
We produced 8 lines of transgenic (Tg) rats expressing one of two different rhodopsin mutations in albino Sprague-Dawley (SD) rats. Three lines were generated with a proline to histidine substitution at codon 23 (P23H), the most common autosomal dominant form of retinitis pigmentosa in the United States. Five lines were generated with a termination codon at position 334 (S334ter), resulting in a C-terminal truncated opsin protein lacking the last 15 amino acid residues and containing all of the phosphorylation sites involved in rhodopsin deactivation, as well as the terminal QVAPA residues important for rhodopsin deactivation and trafficking...
November 6, 2017: Experimental Eye Research
https://www.readbyqxmd.com/read/29121960/non-invasive-quantification-of-age-related-changes-in-the-vertebral-endplate-in-rats-using-in-vivo-dce-mri
#17
Hui Li, Jia-Zhi Yan, Yong-Jie Chen, Wei-Bo Kang, Jia-Xi Huang
BACKGROUND: Small animal models that can mimic degenerative disc disease (DDD) are commonly used to examine DDD progression. However, assessments such as histological studies and macroscopic measurements do not allow for longitudinal studies because they can only be completed after the animal is sacrificed. Dynamic contrast-enhanced MRI (DCE-MRI) may provide a reliable, non-invasive in vivo method for detecting the progression. METHODS: The present study investigated the progression of changes in lumbar discs and the effect of endplate conditions on diffusion into the lumbar discs of aging sand rats after intravenous administration of gadolinium-containing contrast medium through the tail vein...
November 9, 2017: Journal of Orthopaedic Surgery and Research
https://www.readbyqxmd.com/read/29117254/link-n-the-missing-link-towards-intervertebral-disc-repair-is-species-specific
#18
Frances C Bach, Lisanne T Laagland, Michael P Grant, Laura B Creemers, Keita Ito, Björn P Meij, Fackson Mwale, Marianna A Tryfonidou
INTRODUCTION: Degeneration of the intervertebral disc (IVD) is a frequent cause for back pain in humans and dogs. Link-N stabilizes proteoglycan aggregates in cartilaginous tissues and exerts growth factor-like effects. The human variant of Link-N facilitates IVD regeneration in several species in vitro by inducing Smad1 signaling, but it is not clear whether this is species specific. Dogs with IVD disease could possibly benefit from Link-N treatment, but Link-N has not been tested on canine IVD cells...
2017: PloS One
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
#19
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
#20
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
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