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https://www.readbyqxmd.com/read/28634047/the-study-of-the-intervertebral-disc-microstructure-in-matured-rats-with-diffusion-kurtosis-imaging
#1
Li Li, Wenzhen Zhu, Weiwei Chen, Jicheng Fang, Jing Li
OBJECTIVES: The aim of this study was to use DKI to detect the microstructural change of the discs in matured normal rats. METHODS: Total 24 normal SD rats (12 males/12 females) underwent DWI/DKI and T2 sequences with a 3T MRI scanner to get the values of ADC, FA, MD, Da, Dr, MK, Ka and Kr. The discs were categorized using a five-grade degeneration grading system in the T2-images. The height of the discs and the parameters in DWI/DKI were measured to compare between the different grades and sexes...
June 17, 2017: Magnetic Resonance Imaging
https://www.readbyqxmd.com/read/28622016/endoplasmic-reticulum-stress-is-involved-in-nucleus-pulposus-degeneration-and-attenuates-low-ph-induced-apoptosis-of-rat-nucleus-pulposus-cells
#2
Zhi-Yang Xie, Lu Chen, Feng Wang, Lei Liu, Cong Zhang, Kun Wang, Feng Cai, Arjun Sinkemanni, Xin Hong, Xiao-Tao Wu
The microenvironment of degenerative intervertebral disk (IVD) is characteristic of a high concentration of lactic acid and low pH levels, whereas the underlying mechanism has not been clearly defined. Endoplasmic reticulum (ER) is the hub of interactions between environmental signals and cellular biological functions, the malfunction of which is closely involved in the pathogenesis of multiple disorders, including IVD degeneration (IVDD). This research mainly aims at exploring what role ER stress plays in the natural process of IVDD and pH-induced apoptosis of rat nucleus pulposus (NP) cells (NPCs)...
June 16, 2017: DNA and Cell Biology
https://www.readbyqxmd.com/read/28621199/sciatic-nerve-regeneration-by-transplantation-of-in-vitro-differentiated-nucleus-pulposus-progenitor-cells
#3
Takayuki Ishii, Daisuke Sakai, Jordy Schol, Tomoko Nakai, Kaori Suyama, Masahiko Watanabe
AIM: To assess the applicability of mouse intervertebral disc-derived nucleus pulposus (NP) progenitor cells as a cell source for sciatic nerve regeneration. MATERIALS & METHODS: P0-Cre/Floxed-EGFP-transgenic mouse-derived NP progenitor cells were differentiated to Schwann-like cells in conventional induction medium. Schwann-like cells were subsequently transplanted into a mouse model of sciatic nerve transection, and nerve regeneration assessed by immunohistochemistry, electron microscopy and functional walking track analysis and heat stimulus reflex...
June 16, 2017: Regenerative Medicine
https://www.readbyqxmd.com/read/28620118/role-of-p38-mapk-pathway-in-the-effects-of-high-magnitude-compression-on-nucleus-pulposus-cell-senescence-in-a-disc-perfusion%C3%A2-culture
#4
Pei Li, Ruijie Zhang, Yuan Xu, Lei Song, Qiang Zhou
Nucleus pulposus (NP) cell senescence is a typical pathological feature within the degenerative intervertebral disc. As a potential inducing and aggregating factor of disc degeneration, mechanical overloading affects disc biology in multiple ways. This study was to investigate the NP cell senescence-associated phenotype under intermittent high compression in an ex vivo disc bioreactor culture, and the role of the p38-MAPK pathway in this regulatory process. Porcine discs were cultured in culture chambers of a self-developed mechanically active bioreactor and subjected to different magnitudes of dynamic compression (low-magnitude and high-magnitude: 0...
June 15, 2017: Bioscience Reports
https://www.readbyqxmd.com/read/28619001/icariin-attenuates-interleukin-1%C3%AE-induced-inflammatory-response-in-human-nucleus-pulposus-cells
#5
Wen-Bin Hua, Yu-Kun Zhang, Xing-Huo Wu, Liang Kang, Ji Tu, Kang-Cheng Zhao, Shuai Li, Kun Wang, Yu Song, Rong-Jin Luo, Zeng-Wu Shao, Cao Yang
BACKGROUND: Low back pain is a common problem, mainly caused by intervertebral disc degeneration (IDD). An important pathophysiological characteristic of IDD is the loss of homeostatic balance of the extracellular matrix metabolism. Interleukin-1β (IL-1β) is one of the inflammatory mediators stimulating the degradation of extracellular matrix in the nucleus pulposus (NP) and contributing to IDD pathogenesis. Icariin, which is isolated from Epimedium brevicornum, acts as an anti-inflammatory drug...
June 15, 2017: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/28615510/formation-function-and-exhaustion-of-notochordal-cytoplasmic-vacuoles-within-intervertebral-disc-current-understanding-and-speculation
#6
REVIEW
Feng Wang, Zeng-Xin Gao, Feng Cai, Arjun Sinkemani, Zhi-Yang Xie, Rui Shi, Ji-Nan Wei, Xiao-Tao Wu
Notochord nucleus pulposus cells are characteristic of containing abundant and giant cytoplasmic vacuoles. This review explores the embryonic formation, biological function, and postnatal exhaustion of notochord vacuoles, aiming to characterize the signal network transforming the vacuolated nucleus pulposus cells into the vacuole-less chondrocytic cells. Embryonically, the cytoplasmic vacuoles within vertebrate notochord originate from an evolutionarily conserved vacuolation process during neurulation, which may continue to provide mechanical and signal support in constructing a mammalian intervertebral disc...
May 23, 2017: Oncotarget
https://www.readbyqxmd.com/read/28615337/accumulation-of-methylglyoxal-increases-the-advanced-glycation-end-products-levels-in-drg-and-contributes-to-lumbar-disc-herniation-induced-persistent-pain
#7
Cui-Cui Liu, Xin-Sheng Zhang, Yu-Ting Ruan, Zhu-Xi Huang, Su-Bo Zhang, Meng Liu, Hai-Jie Luo, Shao-Ling Wu, Chao Ma
Lumbar disc herniation (LDH) with discogenic low back pain and sciatica is a common and complicated musculoskeletal disorder. The underlying mechanisms are poorly understood and there are no effective therapies for LDH-induced pain. In the present study, we found that the patients who suffered from LDH-induced pain had elevated plasma methylglyoxal (MG) levels. In rats, implantation of autologous nucleus pulposus (NP) to the left lumbar 5 spinal nerve root, which mimicked LDH, induced mechanical allodynia and increased MG level in plasma and dorsal root ganglion (DRG) and enhanced the excitability of small DRG neurons (< 30μm in diameter)...
June 14, 2017: Journal of Neurophysiology
https://www.readbyqxmd.com/read/28608941/tgf-%C3%AE-stimulates-expression-of-chondroitin-polymerizing-factor-in-nucleus-pulposus-cells-through-the-smad3-rhoa-rock1-and-mapk-signaling-pathways
#8
Bo Hu, Chen Xu, Peng Cao, Ye Tian, Ying Zhang, Changgui Shi, Jun Xu, Wen Yuan, Huajiang Chen
The enzyme chondroitin polymerizing factor (ChPF) is primarily involved in extension of the chondroitin sulfate backbone required for the synthesis of sulfated glycosaminoglycan (sGAG). Transforming growth factor beta (TGF-β) upregulates sGAG synthesis in nucleus pulposus cells; however, the mechanisms mediating this induction are incompletely understood. Our study demonstrated that ChPF expression was negatively correlated with the grade of degenerative intervertebral disc disease. Treatment of nucleus pulposus cells with TGF-β induced ChPF expression and enhanced Smad2/3, RhoA/ ROCK activation, and the JNK, p38 and ERK1/2 MAPK signaling pathways...
June 13, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/28603572/fibroblast-transplantation-results-to-the-degenerated-rabbit-lumbar-intervertebral-discs
#9
Ibrahim Halil Ural, Kerem Alptekin, Aysegul Ketenci, Seyhun Solakoglu, Hasan Alpak, Süleyman Özyalçın
BACKGROUND: Our study is an analysis of the histological and radiological changes in degenerated lumbar intervertebral discs, after transplantation of fibroblasts in rabbits. With that study we aimed to show the viability of the fibroblasts injected to the degenerated discs, and observe their potential for further studies. METHOD: The apoptosis of the cell is one of the factors at the disc degeneration process. Fibroblasts may act as mesenchymal stem cells at the tissue to which they are injected and they may replace the apoptotic cells...
2017: Open Orthopaedics Journal
https://www.readbyqxmd.com/read/28600230/cytokine-and-chemokine-profile-changes-in-patients-with-lower-segment-lumbar-degenerative-spondylolisthesis
#10
Juraj Sutovsky, Martin Benco, Martina Sutovska, Michaela Kocmalova, Lenka Pappova, Juraj Miklusica, Andrej Frano, Egon Kurca
BACKGROUND: Lumbar degenerative spondylolisthesis (DS) develops as a result of inflammatory and remodeling processes in facet joints (FJs). Several inflammatory cytokines are involved in the osteoarthritic and remodeling changes that occur and in low-back and/or radicular pain, the most prevalent clinical symptom of disease. This study improves knowledge related to the roles that 27 cytokines, chemokines and growth factors play in the pathophysiology of lumbar DS. MATERIAL AND METHODS: Cytokine levels were examined using capture sandwich immunoassay using the Bio-Plex(®) 200 System and the Bio-PlexTM Human Cytokine Standard 27-Plex, Group I (Bio-Rad, Hercules, California, USA) separately in intervertebral discs (IVDs) and FJ bone tissue...
June 6, 2017: International Journal of Surgery
https://www.readbyqxmd.com/read/28588682/comparison-of-biological-characteristics-of-nucleus-pulposus-mesenchymal-stem-cells-derived-from-non-degenerative-and-degenerative-human-nucleus-pulposus
#11
Zhiwei Jia, Pushan Yang, Yaohong Wu, Yong Tang, Yachao Zhao, Jianhong Wu, Deli Wang, Qing He, Dike Ruan
Cell therapy using mesenchymal stem cells provides a promising approach for the treatment of intervertebral disc degeneration (IDD). In recent years, human nucleus pulposus mesenchymal stem cells (NPMSCs) have been identified in nucleus pulposus tissue and displayed great potential for the regeneration of IDD. However, biological differences between non-degenerative and degenerative nucleus pulposus-derived NPMSCs have remained to be defined. The aim of the present study was to compare the biological characteristics of human NPMSCs derived from non-degenerative and degenerative nucleus pulposus...
June 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28587986/angle-ply-biomaterial-scaffold-for-annulus-fibrosus-repair-replicates-native-tissue-mechanical-properties-restores-spinal-kinematics-and-supports-cell-viability
#12
Ryan Borem, Allison Madeline, Joshua Walters, Henry Mayo, Sanjitpal Gill, Jeremy Mercuri
Annulus fibrosus (AF) damage commonly occurs due to intervertebral disc (IVD) degeneration/herniation. The dynamic mechanical role of the AF is essential for proper IVD function and thus it is imperative that biomaterials developed to repair the AF withstand the mechanical rigors of the native tissue. Furthermore, these biomaterials must resist accelerated degradation within the proteolytic environment of degenerate IVDs while supporting integration with host tissue. We have previously reported a novel approach for developing collagen-based, multi-laminate AF repair patches (AFRPs) that mimic the angle-ply architecture and basic tensile properties of the human AF...
June 3, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28586059/identification-of-critical-genes-in-nucleus-pulposus-cells-isolated-from-degenerated-intervertebral-discs-using-bioinformatics-analysis
#13
Zhuangchen Zhu, Guang Chen, Wei Jiao, Defeng Wang, Yan Cao, Qingfu Zhang, Junqin Wang
Intervertebral disc (IVD) degeneration is a pathological process, which may lead to lower back pain. The present study aimed to investigate the pathogenesis of IVD degeneration. GSE42611 was downloaded from Gene Expression Omnibus, including 4 nucleus pulposus samples isolated from degenerated IVDs and 4 nucleus pulposus samples separated from normal IVDs. The differentially expressed genes (DEGs) between the degenerated and normal samples were screened using the limma package in R. Functional and pathway enrichment analyses were conducted separately for the upregulated and downregulated genes, using Database for Annotation, Visualization and Integrated Discovery software...
July 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28586025/protective-role-of-17%C3%AE-estradiol-on-tumor-necrosis-factor-%C3%AE-induced-apoptosis-in-human-nucleus-pulposus-cells
#14
Huan Liu, Si-Dong Yang, Ying Xu, Sheng-Hua Ning, Tao Wang, Da-Long Yang, Wen-Yuan Ding
The molecular mechanisms underlying protection and pathogenesis in spinal degenerative diseases remain unclear. Tumor necrosis factor-α (TNF-α) has been demonstrated to induce apoptosis of inte rvertebral disc (IVD) cells during IVD degeneration, and 17β‑estradiol (17β‑E2) has a protective effect against IVD cell apoptosis. However, the underlying molecular mechanism by which 17β‑E2 protects nucleus pulposus (NP) cells remains to be investigated. The aim of the present study was to evaluate whether 17β‑E2 modulates apoptosis of human NP cells induced by TNF‑α...
June 6, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28583105/characteristics-and-potentials-of-stem-cells-derived-from-human-degenerated-nucleus-pulposus-potential-for-regeneration-of-the-intervertebral-disc
#15
Xiao-Chuan Li, Yong Tang, Jian-Hong Wu, Pu-Shan Yang, De-Li Wang, Di-Ke Ruan
BACKGROUND: Eliminating the symptoms during treatment of intervertebral disc degeneration (IVDD) is only a temporary solution that does not cure the underlying cause. A biological method to treat this disorder may be possible by the newly discovered nucleus pulposus derived stem cells (NPDCs). However, the uncertain characteristics and potential of NPDCs calls for a comprehensive study. METHODS: In the present study, nucleus pulposus samples were obtained from 5 patients with IVDD undergoing discectomy procedure and NPDCs were harvested using fluorescence activated cell sorting (FACS) by the co-expression of GD2(+) and Tie2(+)...
June 5, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/28576140/rank-rankl-opg-system-in-the-intervertebral-disc
#16
Norihiko Takegami, Koji Akeda, Junichi Yamada, Tomohiko Sano, Koichiro Murata, Jenny Huang, Koichi Masuda, Akihiro Sudo
BACKGROUND: The receptor activator of NF-κB ligand (RANKL), a member of the TNF ligand superfamily, is known to regulate bone metabolism. The expression of each component of the RANK/RANKL/osteoprotegerin (OPG) system in the intervertebral disc (IVD) has not been examined in detail. The purposes of this study were to examine the expression of the RANK/RANKL/OPG system and to evaluate the function of RANKL in the matrix metabolism of the rat IVD. METHODS: Sprague-Dawley, 12-week-old, male rats were used in this study...
June 2, 2017: Arthritis Research & Therapy
https://www.readbyqxmd.com/read/28572152/temporal-evolution-of-disc-in-young-patients-with-low-back-pain-and-stress-reaction-in-lumbar-vertebrae
#17
A Sharma, K Sargar, A Salter
BACKGROUND AND PURPOSE: Although stress-induced bony changes often resolve with conservative treatment, the long-term effects of such mechanical stresses on intervertebral discs have not been studied. We aimed to assess the differences in the temporal evolution of disc in segments of the lumbar spine with and without signs of increased mechanical stresses. MATERIALS AND METHODS: Using MR imaging performed >6 months apart, 2 radiologists evaluated lumbar intervertebral discs for degenerative changes affecting the annulus fibrosus, the nucleus pulposus, and the endplates in 42 patients (22 male, 20 female; mean age, 16...
June 1, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/28570641/correlation-study-between-facet-joint-cartilage-and-intervertebral-discs-in-early-lumbar-vertebral-degeneration-using-t2-t2-and-t1%C3%AF-mapping
#18
Yi Zhang, Jianzhong Hu, Chunyue Duan, Ping Hu, Hongbin Lu, Xianjing Peng
Recent advancements in magnetic resonance imaging have allowed for the early detection of biochemical changes in intervertebral discs and articular cartilage. Here, we assessed the feasibility of axial T2, T2* and T1ρ mapping of the lumbar facet joints (LFJs) to determine correlations between cartilage and intervertebral discs (IVDs) in early lumbar vertebral degeneration. We recruited 22 volunteers and examined 202 LFJs and 101 IVDs with morphological (sagittal and axial FSE T2-weighted imaging) and axial biochemical (T2, T2* and T1ρ mapping) sequences using a 3...
2017: PloS One
https://www.readbyqxmd.com/read/28570511/ovine-lumbar-intervertebral-disc-degeneration-model-utilizing-a-lateral-retroperitoneal-drill-bit-injury
#19
Kai-Zheong Lim, Christopher D Daly, Peter Ghosh, Graham Jenkin, David Oehme, Justin Cooper-White, Taryn Naidoo, Tony Goldschlager
Intervertebral disc degeneration is a significant contributor to the development of back pain and the leading cause of disability worldwide. Numerous animal models of intervertebral disc degeneration have been developed. The ideal animal model should closely mimic the human intervertebral disc with regard to morphology, biomechanical properties and the absence of notochordal cells. The sheep lumbar intervertebral disc model fulfils these criteria. We present an ovine model of intervertebral disc degeneration utilizing a drill bit injury through a lateral retroperitoneal approach...
May 25, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28570296/adamts5-deficiency-protects-mice-from-chronic-tobacco-smoking-induced-intervertebral-disc-degeneration
#20
Kevin Ngo, Pedro Pohl, Adriana S Leme, Joon Lee, Peter Di, Peter Roughley, Paul D Robbins, Laura J Niedernhofer, Gwendolyn Sowa, James D Kang, Steven S Shapiro, Nam V Vo
STUDY DESIGN: ADAMTS5-deficient and WT mice were chronically exposed to tobacco smoke to investigate effects on intervertebral disc degeneration (IDD). OBJECTIVE: To demonstrate a role for ADAMTS5 in mediating tobacco smoking-induced IDD SUMMARY OF BACKGROUND DATA.: We previously demonstrated that chronic tobacco smoking causes IDD in mice due, in part, to proteolytic destruction of disc aggrecan. However, it was unknown which matrix proteinase(s) drive these detrimental effects...
May 31, 2017: Spine
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