scholarly journals Evaluation of injectable nucleus augmentation materials for the treatment of intervertebral disc degeneration

2022 ◽  
Author(s):  
Matthew Philip Culbert ◽  
James P Warren ◽  
Andrew R Dixon ◽  
Hazel Louise Fermor ◽  
Paul A. Beales ◽  
...  
Keyword(s):  
Back Pain ◽  
Intervertebral Disc ◽  
Disc Degeneration ◽  
Lower Back Pain ◽  
Intervertebral Disc Degeneration ◽  
Economic Cost ◽  
Lower Back

Lower back pain affects a person’s health and mobility as well as creating a large economic cost. This is often caused by degeneration of the intervertebral disc. Current operative and...

Injection of a Novel Biomimetic Aggrecan for the Restoration of Intervertebral Disc Tissue Mechanics

2013 ◽  
Author(s):  
Katsiaryna Prudnikova ◽  
David Jamison ◽  
Michele Marcolongo
Keyword(s):  
Extracellular Matrix ◽  
Back Pain ◽  
Intervertebral Disc ◽  
Disc Degeneration ◽  
Lower Back Pain ◽  
Mechanical Stability ◽  
Early Stage ◽  
Tissue Mechanics ◽  
Lower Back ◽  
Bottle Brush

Intervertebral disc degeneration and associated lower back pain is one of the leading musculoskeletal disorders confronting our health system with 15%–20% of the population experiencing lower back pain annually [1–4]. It has been shown that early in disc degeneration, the extracellular matrix of the nucleus pulposus is depleted of the proteoglycan aggrecan, resulting in loss of disc hydration, osmotic pressure and mechanical stability which leads to lower back pain [2, 5]. Early-stage restoration of the proteoglycan content within normal levels with natural aggrecan may help to restore disc functionality but it is cost prohibitive. We propose a new strategy to restore the extracellular matrix of the degenerated disc and mitigate lower back pain by molecularly engineering the disc matrix with an injection of a biomimetic aggrecan (BA) novel class of molecules that mimics the 3D bottle brush structure and physical properties of natural aggrecan.

scholarly journals Author response: Senotherapeutic drugs for human intervertebral disc degeneration and low back pain

2020 ◽  
Author(s):  
Hosni Cherif ◽  
Daniel G Bisson ◽  
Matthew Mannarino ◽  
Oded Rabau ◽  
Jean A Ouellet ◽  
...  
Keyword(s):  
Low Back Pain ◽  
Back Pain ◽  
Intervertebral Disc ◽  
Disc Degeneration ◽  
Intervertebral Disc Degeneration ◽  
Author Response ◽  
Low Back

scholarly journals Ectopic expression of Smurf2 and acceleration of age-related intervertebral disc degeneration in a mouse model

2017 ◽  
Vol 27 (1) ◽  
pp. 116-126 ◽  
Author(s):  
Qiuqian Wu ◽  
Jason H. Huang
Keyword(s):  
Low Back Pain ◽  
Back Pain ◽  
Transgenic Mice ◽  
Intervertebral Disc ◽  
Disc Degeneration ◽  
Intervertebral Disc Degeneration ◽  
Ectopic Expression ◽  
Cell Phenotype ◽  
Low Back ◽  
Age Related

OBJECTIVELumbar intervertebral disc degeneration, an age-related process, is a major cause of low-back pain. Although low-back pain is a very common clinical problem in the aging population, no effective treatment is available, largely owing to lack of understanding of the molecular mechanisms underlying disc degeneration. The goal of this study was to characterize how ectopic expression of Smurf2 driven by the collagen Type II alpha 1 (Col2a1) promoter alters disc cell phenotype and associated cellular events, matrix synthesis, and gene expression during disc degeneration in mice.METHODSTo characterize how ectopic expression of Smurf2 in Col2a1-promoter working cells affects the disc degeneration process, the authors performed histological and immunohistochemical analysis of lumbar spine specimens harvested from wild-type (WT) and Col2a1-Smurf2 transgenic mice at various ages (n ≥ 6 in each age group). To elucidate the molecular mechanism underlying Smurf2-mediated disc degeneration, the authors isolated cells from WT and Col2a1-Smurf2 transgenic lumbar intervertebral discs and performed Western blot and real-time RT-PCR (reverse transcription polymerase chain reaction) to examine the protein and mRNA levels of interesting targets.RESULTSThe authors demonstrated that approximately 30% of WT mice at 10–12 months of age had started to show disc degeneration and that the disc degeneration process was accelerated by 3–6 months in Col2a1-Smurf2 transgenic mice. Chondrocyte-like cell proliferation, maturation, and fibrotic tissue formation in the inner annulus were often accompanied by fibroblast-to-chondrocyte differentiation in the outer annulus in transgenic discs. The chondrocyte-like cells in transgenic discs expressed higher levels of connective tissue growth factor (CTGF) than were expressed in WT counterparts.CONCLUSIONSThe findings that ectopic expression of Smurf2 driven by the Col2a1 promoter accelerated disc degeneration in Col2a1-Smurf2 transgenic mice, and that higher levels of CTGF protein and mRNA were present in Col2a1-Smurf2 transgenic discs, indicate that Smurf2 accelerates disc degeneration via upregulation of CTGF.

Does elite swimming accelerate lumbar intervertebral disc degeneration and increase low back pain? A cross-sectional comparison

2016 ◽  
Vol 25 (9) ◽  
pp. 2849-2855 ◽  
Author(s):  
Steffen Folkvardsen ◽  
Erland Magnussen ◽  
Jaro Karppinen ◽  
Juha Auvinen ◽  
Rasmus Hertzum Larsen ◽  
...  
Keyword(s):  
Low Back Pain ◽  
Back Pain ◽  
Intervertebral Disc ◽  
Disc Degeneration ◽  
Intervertebral Disc Degeneration ◽  
Low Back ◽  
Lumbar Intervertebral Disc ◽  
Cross Sectional

Study of the Feasibility of Conventional MR Images and Magnetic Resonance (MR)/Ultra-Short Echo Time (UTE) Technique in the Evaluation of Lumbar Disc Degeneration in the Axial Plane

2021 ◽  
Vol 11 (3) ◽  
pp. 817-821
Author(s):  
Peng Tang ◽  
Jingtao Xu ◽  
Wei Liu ◽  
Yu Li ◽  
Wei Fan ◽  
...  
Keyword(s):  
Low Back Pain ◽  
Back Pain ◽  
Intervertebral Disc ◽  
Disc Degeneration ◽  
Intervertebral Disc Degeneration ◽  
Structural Integrity ◽  
Low Back ◽  
Pain Group ◽  
Cartilage Endplate ◽  
Significant Difference

The advantage and value of magnetic resonance (MR)-ultra-short echo time (UTE) technique in the displaying the structures of degenerative intervertebral discs were observed through evaluating the lumbar disc degeneration in the axial plane by conventional MR image and MR-UTE technique. A total of 160 examinees screened by inclusion and exclusion criteria were enrolled, and a total of 800 intervertebral disks were involved, and the degree of intervertebral disc degeneration was classified by conventional MR image classification method. After the first echo image of MR-UTE technique was integrated with the contour, the image entered UTE cartilage endplate, fibrous ring and osseous endplate. The integrity of the intervertebral disc from the above and below the intervertebral disc and the correlation of the structural endplate with the integrities of cartilage endplate, fibrous ring and osseous endplate under double echo sequence were analyzed, and the correlation analysis of the two categorical variables was conducted using rank correlation analysis. Under the MR-UTE sequence, there was no statistical significant difference in structural integrity constituent ratio (intact structure only on one side, incomplete structure on both side) between the non-low back pain group and the low back pain group (P > 0.05), the proportion of complete structure disappearance was lowest, and the proportion of partial structure disappearance was highest; there was a significant difference in the structural integrity of fibrous ring between the non-low back pain group and the low back pain group (P < 0.05), there was a statistical significant difference in structural integrity of fibrous rings between the two groups (P < 0.05); there was a statistical significant difference in pain degree between the partial structure disappearance group and the complete structure disappearance group (P < 0.05). There was no significant difference in pain degree between the groups (intact structure only on one side and incomplete structure on both side); conventional MR images showed no significant difference in the intervertebral disc degeneration degree between the non-low back pain group and low back pain group (P > 0.05), and the intervertebral disc degeneration degree had no significant correlation with the lower back pain. MR-UTE sequence and T2WI sequence showed that there was a correlation between different intervertebral disc degeneration degrees and the structural integrity distributions of cartilage endplate, osseous endplate and fibrous rings in two groups of patients with or without low back pain (P < 0.05). Whether low back pain exists or not has little effect on the intervertebral disc degeneration degree on T2WI. MR-UTE double echo sequence scan reveals that the intervertebral disc degeneration degree is positively related to the integrity and integrity distribution of cartilage endplate, fibrous ring and bone endplate.

Nucleus Implant Parameters Significantly Change the Compressive Stiffness of the Human Lumbar Intervertebral Disc

2005 ◽  
Vol 127 (3) ◽  
pp. 536-540 ◽  
Author(s):  
Abhijeet Joshi ◽  
Samir Mehta ◽  
Edward Vresilovic ◽  
Andrew Karduna ◽  
Michele Marcolongo
Keyword(s):  
Back Pain ◽  
Intervertebral Disc ◽  
Lower Back Pain ◽  
Recent Trend ◽  
Intervertebral Discs ◽  
Geometric Parameters ◽  
Synthetic Material ◽  
Lumbar Intervertebral Disc ◽  
Compressive Stiffness ◽  
Lower Back

Nucleus replacement by a synthetic material is a recent trend for treatment of lower back pain. Hydrogel nucleus implants were prepared with variations in implant modulus, height, and diameter. Human lumbar intervertebral discs (IVDs) were tested in compression for intact, denucleated, and implanted condition. Implantation of nucleus implants with different material and geometric parameters into a denucleated IVD significantly altered the IVD compressive stiffness. Variations in the nucleus implant parameters significantly change the compressive stiffness of the human lumbar IVD. Implant geometrical variations were more effective than those of implant modulus variations in the range examined.

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