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Disk Degeneration

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https://www.readbyqxmd.com/read/28437328/is-an-isolated-intervertebral-disk-with-significant-degeneration-magnetic-resonance-imaging-a-cause-of-low-back-pain-that-requires-no-confirmatory-diagnostic-tests
#1
George M Ghobrial, Joshua Heller, Daniel Cataldo, Christopher K Kepler
No abstract text is available yet for this article.
May 2017: Clinical Spine Surgery
https://www.readbyqxmd.com/read/28415293/two-component-dark-bright-solitons-in-three-dimensional-atomic-bose-einstein-condensates
#2
Wenlong Wang, P G Kevrekidis
In the present work, we revisit two-component Bose-Einstein condensates in their fully three-dimensional (3D) form. Motivated by earlier studies of dark-bright solitons in the 1D case, we explore the stability of these structures in their fully 3D form in two variants. In one the dark soliton is planar and trapping a planar bright (disk) soliton. In the other case, a dark spherical shell soliton creates an effective potential in which a bright spherical shell of atoms is trapped in the second component. We identify these solutions as numerically exact states (up to a prescribed accuracy) and perform a Bogolyubov-de Gennes linearization analysis that illustrates that both structures can be dynamically stable in suitable intervals of sufficiently low chemical potentials...
March 2017: Physical Review. E
https://www.readbyqxmd.com/read/28351047/postsurgical-cystoid-macular-edema
#3
Dinah Zur, Anat Loewenstein
Cystoid macular edema (CME) is a primary cause of reduced vision following both cataract and successful vitreoretinal surgery. The incidence of clinical CME following modern cataract surgery is 0.1-2.35%. Preexisting conditions such as diabetes mellitus and uveitis as well as intraoperative complications can raise the risk of postsurgical CME. The etiology of CME is not completely understood. Prolapsed or incarcerated vitreous and postoperative inflammatory processes have been proposed as causative agents. Pseudophakic CME is characterized by poor postoperative visual acuity...
2017: Developments in Ophthalmology
https://www.readbyqxmd.com/read/28350945/intervertebral-disk-degeneration-and-repair
#4
James Dowdell, Mark Erwin, Theodoe Choma, Alexander Vaccaro, James Iatridis, Samuel K Cho
Intervertebral disk (IVD) degeneration is a natural progression of the aging process. Degenerative disk disease (DDD) is a pathologic condition associated with IVD that has been associated with chronic back pain. There are a variety of different mechanisms of DDD (genetic, mechanical, exposure). Each of these pathways leads to a final common result of unbalancing the anabolic and catabolic environment of the extracellular matrix in favor of catabolism. Attempts have been made to gain an understanding of the process of IVD degeneration with in Vitro studies...
March 1, 2017: Neurosurgery
https://www.readbyqxmd.com/read/28326305/implications-for-a-stem-cell-regenerative-medicine-based-approach-to-human-intervertebral-disk-degeneration
#5
REVIEW
Petra Kraus, Thomas Lufkin
The human body develops from a single cell, the zygote, the product of the maternal oocyte and the paternal spermatozoon. That 1-cell zygote embryo will divide and eventually grow into an adult human which is comprised of ~3.7 × 10(13) cells. The tens of trillions of cells in the adult human can be classified into approximately 200 different highly specialized cell types that make up all of the different tissues and organs of the human body. Regenerative medicine aims to replace or restore dysfunctional cells, tissues and organs with fully functional ones...
2017: Frontiers in Cell and Developmental Biology
https://www.readbyqxmd.com/read/28323703/biomechanical-effects-of-human-lumbar-discography-in-vitro-experiments-and-their-finite-element-validation
#6
Kristen E Lipscomb, Nesrin Sarigul-Klijn, Eric Klineberg, Vivek Mohan
STUDY DESIGN: An experimental and computational finite element analysis of human lumbar spine discography and its resulting effects on disk biomechanics. OBJECTIVE: To characterize the changes in stress and displacement of the human lumbar spine disks after puncture due to discography. SUMMARY OF BACKGROUND DATA: Discography of the intervertebral disk (IVD) may be used to diagnose pathology of the disk and determine whether it may be a source for chronic back pain...
April 2017: Clinical Spine Surgery
https://www.readbyqxmd.com/read/28229533/expansion-of-myeloid-derived-suppressor-cells-with-aging-in-the-bone-marrow-of-mice-through-a-nf-%C3%AE%C2%BAb-dependent-mechanism
#7
Rafael R Flores, Cheryl L Clauson, Joonseok Cho, Byeong-Chel Lee, Sara J McGowan, Darren J Baker, Laura J Niedernhofer, Paul D Robbins
With aging, there is progressive loss of tissue homeostasis and functional reserve, leading to an impaired response to stress and an increased risk of morbidity and mortality. A key mediator of the cellular response to damage and stress is the transcription factor NF-κB. We demonstrated previously that NF-κB transcriptional activity is upregulated in tissues from both natural aged mice and in a mouse model of a human progeroid syndrome caused by defective repair of DNA damage (ERCC1-deficient mice). We also demonstrated that genetic reduction in the level of the NF-κB subunit p65(RelA) in the Ercc1(-/∆) progeroid mouse model of accelerated aging delayed the onset of age-related pathology including muscle wasting, osteoporosis, and intervertebral disk degeneration...
February 23, 2017: Aging Cell
https://www.readbyqxmd.com/read/28198469/garp2-accelerates-retinal-degeneration-in-rod-cgmp-gated-cation-channel-%C3%AE-subunit-knockout-mice
#8
Marci L DeRamus, Delores A Stacks, Youwen Zhang, Carrie E Huisingh, Gerald McGwin, Steven J Pittler
The Cngb1 locus-encoded β-subunit of rod cGMP-gated cation channel and associated glutamic acid rich proteins (GARPs) are required for phototransduction, disk morphogenesis, and rod structural integrity. To probe individual protein structure/function of the GARPs, we have characterized several transgenic mouse lines selectively restoring GARPs on a Cngb1 knockout (X1(-/-)) mouse background. Optical coherence tomography (OCT), light and transmission electron microscopy (TEM), and electroretinography (ERG) were used to analyze 6 genotypes including WT at three and ten weeks postnatal...
February 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28188410/simvastatin-inhibits-il-1%C3%AE-induced-apoptosis-and-extracellular-matrix-degradation-by-suppressing-the-nf-kb-and-mapk-pathways-in-nucleus-pulposus-cells
#9
Ji Tu, Wentian Li, Yukun Zhang, Xinghuo Wu, Yu Song, Liang Kang, Wei Liu, Kun Wang, Shuai Li, Wenbin Hua, Cao Yang
Statins are widely used hypocholesterolemic drugs that block the mevalonate pathway. Some studies have shown that statins may have the potential to inhibit intervertebral disk (IVD) degeneration (IDD). Interleukin (IL)-1β, a catabolic cytokine, is a key regulator of IDD. This study aimed to investigate the mechanism underlying the effect of simvastatin on IDD. The viability of nucleus pulposus (NP) cells was determined by the methyl-thiazolyl-tetrazolium (MTT) assay. The apoptosis of NP cells was measured by flow cytometric analysis, terminal deoxynucleotidyl transferase dUTP nick end labeling (TUNEL), and western blotting of relevant apoptotic proteins...
February 10, 2017: Inflammation
https://www.readbyqxmd.com/read/28152249/feasibility-study-for-evaluating-early-lumbar-facet-joint-degeneration-using-axial-t1-%C3%AF-t2-and-t2-mapping-in-cartilage
#10
Jianzhong Hu, Yi Zhang, Chunyue Duan, Xianjing Peng, Ping Hu, Hongbin Lu
PURPOSE: To assess the feasibility of axial T2 , T2*, and T1 ρ mapping of lumbar facet joint (LFJ) cartilage for evaluation of early degeneration. MATERIALS AND METHODS: We examined a total of 176 LFJs from 21 volunteers using axial T2 , T2*, and T1 ρ mapping with a 3.0T magnetic resonance imaging (MRI) scanner. All LFJs were measured and grouped according to the presence of low back pain (LBP), the Weishaupt grading system, and the Pfirrmann grade of the adjacent intervertebral disk (IVD)...
February 2, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28141749/thickness-of-the-macula-retinal-nerve-fiber-layer-and-ganglion-cell-inner-plexiform-layer-in-the-age-related-macular-degeneration-the-repeatability-study-of-spectral-domain-optical-coherence-tomography
#11
Il-Hwan Shin, Woo-Hyuk Lee, Jong-Joo Lee, Young-Joon Jo, Jung-Yeul Kim
PURPOSE: To determine the repeatability of measuring the thickness of the central macula, retinal nerve fiber layer, and ganglion cell-inner plexiform layer (GC-IPL) using spectral domain optical coherence tomography (Cirrus HD-OCT) in eyes with age-related macular degeneration. METHODS: One hundred and thirty-four eyes were included. The measurement repeatability was assessed by an experienced examiner who performed two consecutive measurements using a 512 × 128 macular cube scan and a 200 × 200 optic disk cube scan...
January 30, 2017: Retina
https://www.readbyqxmd.com/read/28127375/predictors-of-reoperation-after-microdecompression-in-lumbar-spinal-stenosis
#12
Hee-Jong Hwang, Hyung-Ki Park, Gwang-Soo Lee, June-Young Heo, Jae-Chil Chang
OBJECTIVE: The risk factors of reoperation after microdecompression (MD) for lumbar spinal stenosis (LSS) are unclear. In this study, we presented the outcomes of MD for degenerative LSS and investigated the risk factors associated with reoperation. METHODS: A retrospective review was conducted using the clinical records and radiographs of patients with LSS who underwent MD. For clinical evaluation, we used the Japanese Orthopedic Association (JOA) scoring system for low back pain, body mass index, and Charlson comorbidity index...
December 2016: Korean Journal of Spine
https://www.readbyqxmd.com/read/28101174/protective-effects-of-resveratrol-on-autologous-nucleus-pulposus-model-of-radiculopathy
#13
Bin Lin, Hui Yu, Yongzhi He, Yang Xu, Wenbin Zhang, Chengwu Lu, Qingfang Ao
Nucleus pulposus (NP) has been suggested to trigger an autoimmune response if exposed to the immune system, which plays a key role in neuropathic pain. Therefore, appropriate suppression of inflammation is a key factor for treating the radiculopathy caused by intervertebral disk (IVD) degeneration. Resveratrol, a key component of red wine, has been suggested to exhibit anti-inflammatory properties in vitro and in vivo. However, the effects of resveratrol on NP-mediated pain in vivo have not been studied. The aim of the present study was to investigate whether resveratrol may be useful in treating NP-mediated pain in an autologous NP model of radiculopathy...
December 2016: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28098731/choroidal-structure-altered-by-degeneration-of-retina-in-eyes-with-retinitis-pigmentosa
#14
Hiroki Kawano, Shozo Sonoda, Shiro Saito, Hiroto Terasaki, Taiji Sakamoto
PURPOSE: To compare the structural characteristics of the choroid in the areas with greater retinal degeneration to the areas with less retinal degeneration in eyes with retinitis pigmentosa (RP). METHODS: Patients with RP who had a hyperautofluorescent ring were studied. The choroidal images obtained by enhanced depth imaging optical coherence tomography located 7,500 μm from the optic disk in the horizontal plane were analyzed. The cross-sectional areas of the total, luminal, and stromal choroid were measured...
January 16, 2017: Retina
https://www.readbyqxmd.com/read/28096690/the-relationship-between-findings-on-magnetic-resonance-imaging-and-previous-history-of-low-back-pain
#15
Juichi Tonosu, Hiroyuki Oka, Ko Matsudaira, Akiro Higashikawa, Hiroshi Okazaki, Sakae Tanaka
The objective of this study was to evaluate the relationship between magnetic resonance imaging (MRI) findings and previous low back pain (LBP) in participants without current LBP. Current LBP was defined as LBP during the past month. Previous LBP was defined as a history of medical consultation for LBP. Ninety-one participants without current LBP were included. Sagittal T2-weighted MRI was used to assess the intervertebral space from T12/L1 to L5/S1. These images were classified into five grades based on the Pfirrmann grading system...
2017: Journal of Pain Research
https://www.readbyqxmd.com/read/28050718/national-trends-following-decompression-discectomy-and-fusion-in-octogenarians-and-nonagenarians
#16
Doniel Drazin, Carlito Lagman, Siddharth Bhargava, Miriam Nuño, Terrence T Kim, J Patrick Johnson
BACKGROUND: The National Inpatient Sample (NIS) database is used to evaluate a wide variety of surgical procedures across a range of specialties. The authors of this study assess national trends of the three commonest spine procedures performed (decompression, fusion, and discectomy) in patients between the ages of 80 and 100 years (octogenarians and nonagenarians). METHODS: The NIS database was queried to identify patients between the ages of 80 and 100 with a primary diagnosis of spinal stenosis, disk herniation without myelopathy, or protrusion due to degeneration of spine/disk disorders and who have undergone spinal decompression, fusion, or discectomy between the years 1998 and 2011...
March 2017: Acta Neurochirurgica
https://www.readbyqxmd.com/read/28050544/influence-of-mononuclear-cell-therapy-on-disc-degeneration-in-rabbits
#17
Rodrigo Caldonazzo Fávaro, André de Oliveira Arruda, Luiz Roberto Gomes Vialle, Emiliano Neves Vialle
OBJECTIVE: The objective of this research was to evaluate the influence of autologous mononuclear stem cells injections on histological changes of collagen in the fibrous annulus of the intervertebral disk after experimental injury. METHODS: 32 New Zealand rabbits were submitted to intervertebral disk puncture, followed by intradiscal injection of mononuclear cells from the iliac crest versus saline injection in the following time periods: two months after the injury (SC2M and SS2M), two weeks (SC2W and SS2W) immediately after injury (SCCP and SSCP), and without inducing degeneration (SCSP and SSSP)...
November 2016: Revista Brasileira de Ortopedia
https://www.readbyqxmd.com/read/28039673/evaluation-of-the-effect-of-fluorescein-angiography-on-retinal-vessel-diameter-an-optical-coherence-tomography-study
#18
Metin Unlu, Duygu Gülmez Sevim, Cagatay Karaca, Bahadir Duzgun, Ayse Ozturk Oner, Ertugrul Mirza
PURPOSE: To evaluate the effect of fluorescein angiography on retinal vessel diameter with Optical Coherence Tomography (OCT). METHODS: In this cross-sectional study, a total of 81 eyes of 81 patients who were performed fluorescein angiography (FA) procedure were included. Retinal vessels were examined with the Spectral-domain OCT at baseline and immediately after FA procedure. A cube scan consisting of seven horizontal scans were placed at the inferior border of the disk to include the inferior temporal retinal vessels...
December 30, 2016: International Ophthalmology
https://www.readbyqxmd.com/read/28005616/five-year-reoperation-rates-of-2-level-lumbar-total-disk-replacement-versus-fusion-results-of-a-prospective-randomized-clinical-trial
#19
Kris Radcliff, Jeffrey Spivak, Bruce Darden, Michael Janssen, Thierry Bernard, Jack Zigler
STUDY DESIGN: Long-term analysis of prospective randomized clinical trial data. SUMMARY OF BACKGROUND DATA: Lumbar total disk replacement (TDR) has been found to have equivalent or superior clinical outcomes compared with fusion and decreased radiographic incidence of adjacent level degeneration in single-level cases. OBJECTIVE: The purpose of this particular analysis was to determine the incidence and risk factors for secondary surgery in patients treated with TDR or circumferential fusion at 2 contiguous levels of the lumbar spine...
December 21, 2016: Clinical Spine Surgery
https://www.readbyqxmd.com/read/27918900/differential-gene-expression-in-the-condylar-cartilage-of-growing-rabbits-with-temporomandibular-joint-anterior-disk-displacement-a-transcriptomic-study
#20
Shuhua Wang, Liquan Deng, Ye Li, Huiling Wu, Zhiyuan Gu
Internal derangement (ID) in the temporomandibular joint (TMJ) comprises a group of clinical problems with relatively high prevalence. However, the temporal changes in gene expression of condylar cartilage during continuous ID remain unclear. The aim of the current study is to investigate by microarray analysis, the differentially-expressed gene pattern in condylar cartilage of rabbits with ID from one to eight weeks of ID progression. Histological results (hematoxylin and eosin staining) indicated that abnormal collagen fiber arrangements, fragmentation of fibrils, and inflammatory cell-infiltration were detected from one to four weeks in joint disc specimens, while newly formed vessels, mucoid degeneration, meniscal tears, and the presence of osteoclasts and osteoblasts were observed at later time points...
February 2017: Archives of Oral Biology
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