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https://www.readbyqxmd.com/read/28727709/transforaminal-percutaneous-endoscopic-discectomy-and-foraminoplasty-after-lumbar-spinal-fusion-surgery
#1
Jian-Jun Wu, Hui-Zhen Chen, Changkun Zheng
BACKGROUND: The most common causes of pain following lumbar spinal fusions are residual herniation, or foraminal fibrosis and foraminal stenosis that is ignored, untreated, or undertreated. The original surgeon may advise his patient that nothing more can be done in his opinion that the nerve was visually decompressed by the original surgery. Post-operative imaging or electrophysiological assessment may be inadequate to explain all the reasons for residual or recurrent symptoms. Treatment of failed lumbar spinal fusions by repeat traditional open revision surgery usually incorporates more extensive decompression causing increased instability and back pain...
July 2017: Pain Physician
https://www.readbyqxmd.com/read/28727705/activation-of-the-rage-stat3-pathway-in-the-dorsal-root-ganglion-contributes-to-the-persistent-pain-hypersensitivity-induced-by-lumbar-disc-herniation
#2
Xin-Sheng Zhang, Xiao Li, Hai-Jie Luo, Zhu-Xi Huang, Cui-Cui Liu, Qing Wan, Shu-Wei Xu, Shao-Ling Wu, Song-Jian Ke, Chao Ma
BACKGROUND: Clinically, chronic low back pain and sciatica associated with lumbar disc herniation (LDH) is a common musculoskeletal disorder. Due to the unawareness of detailed mechanisms, it is difficult to get an effective therapy. OBJECTIVE: The aim of the present study was to identify the role of the RAGE/STAT3 pathway in the dorsal root ganglion (DRG) on the formation and development of persistent pain hypersensitivity induced by LDH. STUDY DESIGN: Controlled animal study...
July 2017: Pain Physician
https://www.readbyqxmd.com/read/28719551/annulus-fibrosus-repair-using-high-density-collagen-gel-an-in-vivo-ovine-model
#3
Brenton Pennicooke, Ibrahim Hussain, Connor Berlin, Stephen R Sloan, Brandon Borde, Yu Moriguchi, Gernot Lang, Rodrigo Navarro-Ramirez, Jonathan Cheetham, Lawrence J Bonassar, Roger Härtl
STUDY DESIGN: Ovine in vivo study. OBJECTIVE: To perform lateral approach lumbar surgery in an ovine model to administer an injectable riboflavin (RF) cross-linked high-density collagen (HDC) gel and to assess its ability to mitigate intervertebral disc (IVD) degeneration after induced annulus fibrosus (AF) injury. SUMMARY OF BACKGROUND DATA: Biological-based injectable gels have shown efficacy in restoring biomechanical, radiographic, and histological parameters in IVD-injured animal models...
July 17, 2017: Spine
https://www.readbyqxmd.com/read/28719035/melatonin-inhibits-nucleus-pulposus-np-cell-proliferation-and-extracellular-matrix-ecm-remodeling-via-the-melatonin-membrane-receptors-mediated-pi3k-akt-pathway
#4
Zheng Li, Xingye Li, Chong Chen, Matthew T V Chan, William Ka Kei Wu, Jianxiong Shen
Pinealectomy in vertebrates accelerated intervertebral disc degeneration (IDD). However, the potential mechanisms, particularly, melatonin's role is still to be clarified. In this study, for first time, melatonin membrane receptors of MT1 and MT2 were found to be present in the human intervertebral disc tissues and nucleus pulposus (NP) cells, respectively. Melatonin treatment significantly inhibited NP cell proliferation in dose- dependent manner. Accordingly, melatonin down-regulated gene expression of cyclin D1, PCNA, matrix metallopeptidases-3 and -9 and upregulated gene expression of collagen type II alpha 1 chain and aggrecan in NP cells...
July 18, 2017: Journal of Pineal Research
https://www.readbyqxmd.com/read/28716711/epigenetic-silencing-of-mirna-143-regulates-apoptosis-by-targeting-bcl2-in-human-intervertebral-disc-degeneration
#5
Kangcheng Zhao, Yukun Zhang, Kang Liang, Yu Song, Kun Wang, Shuai Li, Xinghuo Wu, Wenbin Hua, Zengwu Shao, Shuhua Yang, Cao Yang
Accumulating evidence indicates that microRNAs can regulate the apoptosis of various cells. Apoptosis of nucleus pulposus cells plays an important role in the progression of intervertebral disc degeneration. The aim of this study is to investigate whether microRNA-143 (miRNA-143) is involved in the progression of intervertebral disc degeneration. In this study, the expression of miRNA-143 and its biological modulatory effects were examined. Messenger RNA and protein expression of miRNA-143 and B-cell lymphoma-2 (BCL2) in both normal and degenerative disc tissues was determined by using RT-PCR and western-blot assays...
July 14, 2017: Gene
https://www.readbyqxmd.com/read/28715865/chitosan-oligosaccharides-protect-nucleus-pulposus-cells-from-hydrogen-peroxide-induced-apoptosis-in-a-rat-experimental-model
#6
Peng Jia, Ling Yu, Chunjie Tao, Guo Dai, Zhengpei Zhang, Shiqing Liu
Chitosan has been investigated for its protective effect on nucleus pulposus (NP) cells against intervertebral disc degeneration(IDD), but its high molecular weight prohibits its clinical application. The low molecular derivatives, chitosan oligosaccharides (COS) are easier to absorb; however, the protective effect of COS against IDD remains unclear. In this study, we investigated the effects of COS on NP degeneration. NP cells derived from rats were treated with H2O2 to induce an IDD-like transition. Then, COS was used to pre-treat cells before administering H2O2 and changes occurring in the cells were observed...
July 13, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28709868/protective-effect-of-p53-on-the-viability-of-intervertebral-disc-nucleus-pulposus-cells-under-low-glucose-condition
#7
Xifeng Xiong, Libing Dai, Weiguo Liang, Jinli Zhang, Shengnan Qin, Wenjuan Cao, Dongping Ye, Peihong Liang, Zhihe Liu
P53 is a famous cancer suppressor and plays key roles in metabolism. Intervertebral disc (IVD) is the largest avascular cartilaginous structure in humans and its degeneration is a common cause of spine diseases initiated from damaged nucleus pulposus (NP) cells. The potential cause of disc degeneration has been attributed to aging, genetic factors, mechanical factors and nutrition. In this study, we found that p53 decreased and leaked to the cytoplasm in NP cells as the glucose level decreases, in contrast to cancer cells in which p53 increases and concentrates to the nuclei...
July 11, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28705727/the-piezo1-protein-ion-channel-functions-in-human-nucleus-pulposus-cell-apoptosis-by-regulating-mitochondrial-dysfunction-and-the-endoplasmic-reticulum-stress-signal-pathway
#8
Xiao-Fei Li, Ping Leng, Zhao Zhang, Hai-Ning Zhang
The Piezo1 protein ion channel is a novel mechanical stretch-activated ion channel (SAC) closely related to mechanical signals. Mechanotransduction plays a crucial role in organ development and homeostasis. Previous studies identified Piezo1 and demonstrated that it is distinct from other ion channels with well-established roles in lower organisms. Mechanical stretch-activated ion channels from other organisms are not conserved in mammals or do not act as mechanically activated channels in mammals. In the current study, we explored the role of the Piezo1 ion channel in human nucleus pulposus cell (NP cell) apoptosis through mechanical force-induced mitochondrial dysfunction and endoplasmic reticulum stress...
July 10, 2017: Experimental Cell Research
https://www.readbyqxmd.com/read/28699925/quantifying-baseline-fixed-charge-density-in-healthy-human-cartilage-endplate-a-two-point-electrical-conductivity-method
#9
Yongren Wu, Sarah E Cisewski, Yi Sun, Brooke J Damon, Barton L Sachs, Vincent D Pellegrini, Elizabeth H Slate, Hai Yao
STUDY DESIGN: Regional measurements of fixed charge densities (FCDs) of healthy human cartilage endplate (CEP) using a two-point electrical conductivity approach. OBJECTIVE: To determine the FCDs at four different regions (central, lateral, anterior, and posterior) of human CEP, and correlate the FCDs with tissue biochemical composition. SUMMARY OF BACKGROUND DATA: The CEP, a thin layer of hyaline cartilage on the cranial and caudal surfaces of the intervertebral disc, plays an irreplaceable role in maintaining the unique physiological mechano-electrochemical environment inside the disc...
January 5, 2017: Spine
https://www.readbyqxmd.com/read/28693076/-high-mechanical-stretch-stress-promotes-degeneration-of-the-human-nucleus-pulposus-cells-through-nf-%C3%AE%C2%BAb-signaling-pathway
#10
S J Wang, Z Y Sun, C Liu, P Yan, H Liang, K Huang, D G Wang, Y Li, J W Tian
Objective: To investigate the effect of high mechanical stretch stress(HMS)on human nucleus pulposus cells and its regulatory mechanism. Methods: The non-degenerated nucleus pulposus tissue (Pfirrmann<grade Ⅲ) removed from the patient's surgery was harvested and the human nucleus pulposus cells were isolated and cultured. In the presence or absence of pretreatment with the NF-κB specific blocker Bay11-7082, the cultured human nucleus pulposus cells were loaded cyclic mechanical stretch stress(CMS) with different parameters using the Flexercell system...
July 4, 2017: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/28679056/self-healing-dynamic-hydrogel-as-injectable-shock-absorbing-artificial-nucleus-pulposus
#11
Adrián Pérez-San Vicente, Marianna Peroglio, Manuela Ernst, Pablo Casuso, Iraida Loinaz, Hans-Jürgen Grande, Mauro Alini, David Eglin, Damien Dupin
The intervertebral discs (IVDs) provide unique flexibility to the spine and exceptional shock absorbing properties under impact. The inner core of the IVD, the nucleus pulposus (NP) is responsible for this adaptive behavior. Herein, we evaluate an injectable, self-healing dynamic hydrogel (DH) based on gold(I)-thiolate/disulfide (Au-S/SS) exchange as NP replacement in a spine motion segment model. For the first time, we report the application of dynamic covalent hydrogels inside biological tissues. The dynamic exchange between Au-S species and disulfide bonds (SS) resulted in self-healing ability and frequency-dependent stiffness of the hydrogel, which was also confirmed in spine motion segments...
July 19, 2017: Biomacromolecules
https://www.readbyqxmd.com/read/28674787/the-transpedicular-surgical-approach-for-the-development-of-intervertebral-disc-targeting-regenerative-strategies-in-an-ovine-model
#12
Luc Le Fournier, Marion Fusellier, Boris Halgand, Julie Lesoeur, Olivier Gauthier, Philippe Menei, Claudia Montero-Menei, Jérôme Guicheux, Johann Clouet
PURPOSE: To investigate the suitability of the transpedicular approach (TPA) in a sheep model of IVD regenerative strategies METHODS: 24 IVD from four sheep were used. TPA and biopsies of the Nucleus pulposus (NP) were performed in 18 IVD (6 IVD control). Seven discographies were performed to assess the feasibility of injecting contrast agent. MRI, micro-CT scan, and histological analyses were performed and the accuracy of the TPA was evaluated. The effects on the vertebra and endplates were analyzed...
July 3, 2017: European Spine Journal
https://www.readbyqxmd.com/read/28674405/lack-of-evidence-for-involvement-of-tonebp-and-hyperosmotic-stimulus-in-induction-of-autophagy-in-the-nucleus-pulposus
#13
Chao Liu, Hyowon Choi, Zariel I Johnson, Jiwei Tian, Irving M Shapiro, Makarand V Risbud
Nucleus pulposus (NP) cells reside in a physiologically hyperosmotic environment within the intervertebral disc. TonEBP/NFAT5 is an osmo-sensitive transcription factor that controls expression of genes critical for cell survival under hyperosmotic conditions. A recent report on NP and studies of other cell types have shown that hyperosmolarity triggers autophagy. However, little is known whether such autophagy induction occurs through TonEBP. The goal of this study was to investigate the role of TonEBP in hyperosmolarity-dependent autophagy in NP...
July 3, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28670405/intradiscal-injection-of-autologous-platelet-rich-plasma-releasate-to-treat-discogenic-low-back-pain-a-preliminary-clinical-trial
#14
Koji Akeda, Kohshi Ohishi, Koichi Masuda, Won C Bae, Norihiko Takegami, Junichi Yamada, Tomoki Nakamura, Toshihiko Sakakibara, Yuichi Kasai, Akihiro Sudo
STUDY DESIGN: Preliminary clinical trial. PURPOSE: To determine the safety and initial efficacy of intradiscal injection of autologous platelet-rich plasma (PRP) releasate in patients with discogenic low back pain. OVERVIEW OF LITERATURE: PRP, which is comprised of autologous growth factors and cytokines, has been widely used in the clinical setting for tissue regeneration and repair. PRP has been shown in vitro and in vivo to potentially stimulate intervertebral disc matrix metabolism...
June 2017: Asian Spine Journal
https://www.readbyqxmd.com/read/28670402/disc-rehydration-after-dynamic-stabilization-a-report-of-59-cases
#15
Atilla Yilmaz, Salim Senturk, Mehdi Sasani, Tunc Oktenoglu, Onur Yaman, Hakan Yildirim, Tuncer Suzer, Ali Fahir Ozer
STUDY DESIGN: A retrospective study investigating decrease in the nucleus pulposus signal intensity or disc height on magnetic resonance imaging (MRI) and disc degeneration. PURPOSE: Although a degenerated disc cannot self-regenerate, distraction or stabilization may provide suitable conditions for rehydration and possible regeneration. This study aimed to evaluate clinical outcomes and disc regeneration via MRI in a series of patients with degenerative disc disease (DDD) who underwent lumbar stabilization with a dynamic stabilization system (DSS)...
June 2017: Asian Spine Journal
https://www.readbyqxmd.com/read/28669721/initial-investigation-of-individual-and-combined-annulus-fibrosus-and-nucleus-pulposus-repair-ex-vivo
#16
Stephen R Sloan, Devis Galesso, Cynthia Secchieri, Connor Berlin, Roger Hartl, Lawrence J Bonassar
Novel tissue engineered and biomaterial approaches to treat intervertebral disc (IVD) degeneration focus on single aspects of the progressive disease and hence are insufficient repair strategies. In this study, annulus fibrosus (AF) and nucleus pulposus (NP) biomaterial repair strategies were used individually and combined to treat IVD degeneration modeled in ex vivo rat-tail motion segments by annulotomy and nucleotomy. An injectable riboflavin cross-linked high-density collagen gel patched defects in the AF, while NP repair consisted of injections of a modified hyaluronic acid (HA) hydrogel...
June 29, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28667916/mir-210-facilitates-ecm-degradation-by-suppressing-autophagy-via-silencing-of-atg7-in-human-degenerated-np-cells
#17
Cheng Wang, Zi-Zhen Zhang, Wei Yang, Zhi-Hua Ouyang, Jing-Bo Xue, Xue-Lin Li, Jian Zhang, Wen-Kang Chen, Yi-Guo Yan, Wen-Jun Wang
Intervertebral disc degeneration (IDD) is thought to be the most common cause of low back pain. Dysregulation of microRNAs (miRNAs) is involved in the development of IDD. The aim of this study was to explore the influence of miR-210 on type II collagen (Col II) and aggrecan expression and possible mechanisms in human degenerated nucleus pulposus (NP) cells. Our results showed that miR-210 levels were significantly increased in degenerated NP tissues compared with healthy controls, and positively correlated with disc degeneration grade...
June 28, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28662011/-the-assessment-of-the-impact-of-rehabilitation-on-the-pain-intensity-level-in-patients-with-herniated-nucleus-pulposus-of-the-intervertebral-disc
#18
Kamil Koszela, Sylwia Krukowska, Marta Woldańska-Okońska
Back disorders are very common phenomena in modern society. One of the methods of spinal pain treatment is performing surgery. Unfortunately, this method is not one hundred percent effective. Some patients show no improvement after surgery, the pain persists and even increases. In these cases, it is reasonable to use the term Failed Back Surgery Syndrome (FBSS), i.e. back pain syndrome after unsuccessful spine surgery. AIM: The aim of the study is to assess the impact of rehabilitation on the pain intensity level in patients with FBSS...
June 23, 2017: Polski Merkuriusz Lekarski: Organ Polskiego Towarzystwa Lekarskiego
https://www.readbyqxmd.com/read/28658037/investigation-of-the-effect-of-diabetes-on-radiculopathy-induced-by-nucleus-pulposus-application-to-the-drg-in-a-spontaneously-diabetic-rat-model
#19
Takuya Kameda, Miho Sekiguchi, Yoichi Kaneuchi, Shin-Ichi Konno
STUDY DESIGN: Controlled, interventional animal study. OBJECTIVE: To evaluate the effect of diabetes mellitus (DM) on radiculopathy due to lumbar disc herniation (LDH), by investigating pain-related behavior and the expression of tumor necrosis factor-alpha (TNF-α) and growth-associated protein 43 (GAP43) in type 2 diabetic rats following application of nucleus pulposus (NP) to the dorsal root ganglion (DRG). SUMMARY OF BACKGROUND DATA: Previous clinical studies suggested negative effects of DM on radiculopathy due to LDH, and that inflammation and nerve regeneration could interact with DM and radiculopathy...
June 27, 2017: Spine
https://www.readbyqxmd.com/read/28651128/local-up-regulation-of-interferon-%C3%AE-ifn-%C3%AE-following-disc-herniation-is-involved-in-the-inflammatory-response-underlying-acute-lumbar-radicular-pain
#20
Gunn-Helen Moen, Aurora Moen, Elina I Schistad, Johannes Gjerstad
Lumbar radicular pain after disc herniation may be associated with release of pro-inflammatory cytokines from nucleus pulposus (NP) tissue. In the present study we examined the role of interferon-γ (IFN-γ) and cluster of differentiation 68 (CD68) in the acute phase of this process. First, in an animal model mimicking the clinical situation after disc herniation, the role of IFN-γ close to the dorsal nerve roots was studied. Next, in patients with lumbar radicular pain due to disc herniation, we examined how two single nucleotide polymorphisms (SNPs; rs2069705 and rs2069718) are important for the IFN-γ expression influenced the pain behavior...
June 23, 2017: Cytokine
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