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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/28632557/vertebral-end-plate-perforation-for-intervertebral-disc-height-preservation-after-single-level-lumbar-discectomy-a-randomized-controlled-trial
#2
Miha Vodičar, Robert Košak, Matevž Gorenšek, Robert Korez, Tomaž Vrtovec, Jadran Koder, Vane Antolič, Rok Vengust
STUDY DESIGN: Pilot single-centre, stratified, prospective, randomized, double-blinded, parallel-group, controlled study. OBJECTIVE: To determine whether vertebral end-plate perforation after lumbar discectomy causes annulus reparation and intervertebral disc volume restoration. To determine that after 6 months there would be no clinical differences between the control and study group. SUMMARY OF BACKGROUND DATA: Low back pain is the most common long-term complication after lumbar discectomy...
July 2017: Clinical Spine Surgery
https://www.readbyqxmd.com/read/28632492/is-the-location-of-the-signal-intensity-weighted-centroid-a-reliable-measurement-of-fluid-displacement-within-the-disc
#3
Vahid Abdollah, Eric C Parent, Michele C Battié
Degenerated discs have shorter T2-relaxation time and lower MR signal. The location of the signal-intensity-weighted-centroid reflects the water distribution within a region-of-interest (ROI). This study compared the reliability of the location of the signal-intensity-weighted-centroid to mean signal intensity and area measurements. L4-L5 and L5-S1 discs were measured on 43 mid-sagittal T2-weighted 3T MRI images in adults with back pain. One rater analysed images twice and another once, blinded to measurements...
June 20, 2017: Biomedizinische Technik. Biomedical Engineering
https://www.readbyqxmd.com/read/28631843/age-related-spontaneous-lumbar-intervertebral-disc-degeneration-in-a-mouse-model
#4
Takashi Ohnishi, Hideki Sudo, Takeru Tsujimoto, Norimasa Iwasaki
The pathogenesis of intervertebral disc degeneration is unclear, but it is a major cause of several spinal diseases. Animal models have historically provided an appropriate benchmark for understanding the human spine. However, there is little information about when intervertebral disc degeneration begins in the mouse or regarding the relationship between magnetic resonance imaging and histological findings. The aim for this study was to obtain information about age-related spontaneous intervertebral disc degeneration in the mouse lumbar spine using magnetic resonance imaging and a histological score regarding when the intervertebral disc degeneration started and how rapidly it progressed, as well as how our histological score detected the degeneration...
June 20, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/28625479/the-change-of-adjacent-segment-after-cervical-disc-arthroplasty-compared-with-anterior-cervical-discectomy-and-fusion-a-meta-analysis-of-randomized-controlled-trials
#5
REVIEW
Liang Dong, Zhengwei Xu, Xiujin Chen, Dongqi Wang, Dichen Li, Tuanjing Liu, Dingjun Hao
BACKGROUD CONTEXT: Many meta-analyses have been performed to study the efficacy of cervical disc arthroplasty (CDA) compared with anterior cervical discectomy and fusion (ACDF); however, there are few data referring to adjacent segment within these meta-analyses, or investigators are unable to arrive at the same conclusion in the few meta-analyses about adjacent segment. With the increased concerns surrounding adjacent segment degeneration (ASDeg) and adjacent segment disease (ASDis) after anterior cervical surgery, it is necessary to perform a comprehensive meta-analysis to analyze adjacent segment parameters...
June 15, 2017: Spine Journal: Official Journal of the North American Spine Society
https://www.readbyqxmd.com/read/28620652/visual-and-morphologic-outcomes-in-eyes-with-hard-exudate-in-the-comparison-of-age-related-macular-degeneration-treatments-trials
#6
Ebenezer Daniel, Juan E Grunwald, Benjamin J Kim, Maureen G Maguire, Glenn J Jaffe, Cynthia A Toth, Frederick L Ferris, Daniel F Martin, James Shaffer, Gui-Shuang Ying
PURPOSE: To compare baseline characteristics, visual acuity (VA) and morphological outcomes between eyes with baseline hard exudates (HE) and all other eyes among patients with neovascular age-related macular degeneration (NVAMD) treated with anti-vascular endothelial growth factors (anti-VEGF). DESIGN: Prospective cohort study within the Comparison of Age-Related Macular Degeneration Treatments Trials (CATT). PARTICIPANTS: Patients with NVAMD...
January 2017: Ophthalmology retina
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
#7
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
#8
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
#9
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/28612187/enhancement-of-energy-production-of-the-intervertebral-disc-by-the-implantation-of-polyurethane-mass-transfer-devices
#10
Yu-Fu Wang, Howard B Levene, Weiyong Gu, C -Y Charles Huang
Insufficient nutrient supply has been suggested to be one of the etiologies for intervertebral disc (IVD) degeneration. We are investigating nutrient transport into the IVD as a potential treatment strategy for disc degeneration. Most cellular activities in the IVD (e.g., cell proliferation and extracellular matrix production) are mainly driven by adenosine-5'-triphosphate (ATP) which is the main energy currency. The objective of this study was to investigate the effect of increased mass transfer on ATP production in the IVD by the implantation of polyurethane (PU) mass transfer devices...
June 13, 2017: Annals of Biomedical Engineering
https://www.readbyqxmd.com/read/28609385/association-between-menopause-and-lumbar-disc-degeneration-an-mri-study-of-1-566-women-and-1-382-men
#11
Chao Lou, Hongliang Chen, Liangwei Mei, Weiyang Yu, Kejun Zhu, Feijun Liu, Zhenzhong Chen, Guangheng Xiang, Minjiang Chen, Qiaoyou Weng, Dengwei He
OBJECTIVE: The aim of this study was to revisit and further investigate the association between menopause and disc degeneration in the lumbar spine using a magnetic resonance imaging-based eight-level grading system. METHODS: This study cohort comprised of 1,566 women and 1,382 age-matched men who were admitted for low back pain from June 2013 to October 2016. Data on age, weight, height, body mass index, age at natural menopause, and years since menopause (YSM) were obtained...
June 12, 2017: Menopause: the Journal of the North American Menopause Society
https://www.readbyqxmd.com/read/28606605/cervical-and-thoracic-intervertebral-disc-hydration-increases-with-recumbency-a-study-in-101-healthy-volunteers
#12
Daniel L Belavy, Matthew Quittner, Yuan Ling, David Connell, Timo Rantalainen
BACKGROUND CONTEXT: Variation in water content and size of the lumbar intervertebral discs (IVDs) is known to occur due to recumbency and has been associated with lumbar IVD herniation risk through the impact of IVD hydration on tissue mechanical properties. It is not clear if similar changes in the cervical or thoracic IVDs occur with recumbency. PURPOSE: Determine whether increases in hydration of thoracic and cervical IVDs occur with short-duration recumbency...
June 9, 2017: Spine Journal: Official Journal of the North American Spine Society
https://www.readbyqxmd.com/read/28606581/the-effect-of-single-level-disc-degeneration-on-dynamic-response-of-the-whole-lumbar-spine-to-vertical-vibration
#13
Li-Xin Guo, Wei Fan
OBJECTIVE: The objective of this study was to investigate the effect of single-level disc degeneration on dynamic response of the whole lumbar spine to vertical whole body vibration that is typically present when driving vehicles. METHODS: Ligamentous finite element models of the lumbar L1-S1 motion segment in different grades of degeneration (healthy, mild and moderate) at L4-L5 level were developed with consideration of changing disc height and material properties of the nucleus pulpous...
June 9, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28604492/a-microstructural-investigation-of-disc-disruption-induced-by-low-frequency-cyclic-loading
#14
Meredith L Schollum, Kelly R Wade, Peter A Robertson, Ashvin Thambyah, Neil D Broom
STUDY DESIGN: Microstructural investigation of low frequency cyclic loading and flexing of the lumbar disc. OBJECTIVE: To explore micro-level structural damage in motion segments subjected to low frequency repetitive loading and flexing at sub-acute loads. SUMMARY OF BACKGROUND DATA: Cumulative exposure to mechanical load has been implicated in low back pain and injury. The mechanical pathways by which cyclic loading physically affects spine tissues remain unclear, in part due to the absence of high quality microstructural evidence...
June 9, 2017: Spine
https://www.readbyqxmd.com/read/28604488/anterior-cervical-discectomy-and-fusion-outcomes-over-10-years-a-prospective-study
#15
Glenn R Buttermann
STUDY DESIGN: Prospective cohort study with >10-year follow-up. OBJECTIVE: To assess the long-term, >10-year, clinical outcomes of anterior cervical discectomy and fusion (ACDF) and to compare outcomes based on primary diagnosis of disc herniation; stenosis or advanced degenerative disc disease (DDD); number of levels treated; and preexisting adjacent level degeneration. SUMMARY OF BACKGROUND DATA: ACDF is a proven treatment for patients with stenosis and disc herniation and results in significantly improved short- and intermediate-term outcomes...
June 9, 2017: Spine
https://www.readbyqxmd.com/read/28603572/fibroblast-transplantation-results-to-the-degenerated-rabbit-lumbar-intervertebral-discs
#16
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
#17
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/28597366/finite-element-model-predicts-the-biomechanical-performance-of-cervical-disc-replacement-and-fusion-hybrid-surgery-with-various-geometry-of-ball-and-socket-artificial-disc
#18
Yang Li, Guy R Fogel, Zhenhua Liao, Weiqiang Liu
PURPOSE: Few finite element studies have investigated changes in cervical biomechanics with various prosthesis design parameters using hybrid surgery (HS), and none have investigated those combined different HS strategies. The aim of our study was to investigate the effect of ball-and-socket prosthesis geometry on the biomechanical performance of the cervical spine combined with two HS constructs. METHODS: Two HS strategies were conducted: (1) ACDF at C4-C5 and anterior cervical disc replacement (ACDR) at C5-C6 (ACDF/ACDR), and (2) ACDR/ACDF...
June 8, 2017: International Journal of Computer Assisted Radiology and Surgery
https://www.readbyqxmd.com/read/28594131/optimization-of-puncture-injury-to-rat-caudal-disc-for-mimicking-early-degeneration-of-intervertebral-disc
#19
Ming-Hsiao Hu, Kai-Chiang Yang, Yeong-Jang Chen, Yuan-Hui Sun, Feng-Huei Lin, Shu-Hua Yang
The caudal discs of rats have been proposed as a puncture model in which intervertebral disc (IVD) degeneration can be induced and novel therapies can be tested. For biological repair, treatments for ongoing IVD degeneration are ideally administered during the earlier stages. The purpose of this study was to elucidate the optimal puncture needle size for creating a model that mimicked the earlier stages of IVD degeneration. According to the disc height index, histologic score and MRI grading, a puncture needle sized 21G or larger induced rapid degenerative processes in rat caudal discs during the initial 2-4 weeks...
June 8, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/28591077/progressive-bone-formation-after-cervical-disc-replacement-minimum-of-5-year-follow-up
#20
Feifei Zhou, Kevin L Ju, Yanbin Zhao, Fengshan Zhang, Shengfa Pan, John G Heller, Yu Sun
OBJECTIVE: Our objective was to examine the prevalence, clinical significance, ramifications, and possible etiology of postoperative bone formation at the index level after Cervical Disc Replacement (CDR) with a minimum of five years of follow-up. SUMMARY OF BACKGROUND DATA: CDR can be complicated by postoperative ossification and unwanted ankylosis at the index level, which some authors have termed "heterotopic ossification". This terminology may be inaccurate as it assumes the postoperative bone formation is unnatural and a consequence of the CDR surgery...
June 6, 2017: Spine
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