4 results on '"Salzer, Elias"'
Search Results
2. A bovine nucleus pulposus explant culture model
- Author
-
Salzer, Elias, primary, Mouser, Vivian H. M., additional, Tryfonidou, Marianna A., additional, and Ito, Keita, additional
- Published
- 2021
- Full Text
- View/download PDF
3. A comprehensive tool box for large animal studies of intervertebral disc degeneration
- Author
-
Lee, Naomi N, Salzer, Elias, Bach, Frances C, Bonilla, Andres F, Cook, James L, Gazit, Zulma, Grad, Sibylle, Ito, Keita, Smith, Lachlan J, Vernengo, Andrea, Wilke, Hans-Joachim, Engiles, Julie B, Tryfonidou, Marianna A, Chirurgie, dCSCA RMSC-1, Chirurgie, dCSCA RMSC-1, Orthopaedic Biomechanics, Eindhoven MedTech Innovation Center, and ICMS Core
- Subjects
pig ,Special Issue Articles: Jor Spine Histopathology Series ,sheep ,disc disease ,spine research ,neck pain ,Context (language use) ,Degeneration (medical) ,Research community ,medicine ,Orthopedics and Sports Medicine ,low back pain ,Orthopedic surgery ,business.industry ,Regeneration (biology) ,goat ,Special Issue Article ,biomechanical testing ,Intervertebral disc ,clinical assessment ,spine disorders ,Spinal pain ,medicine.anatomical_structure ,dog ,histopathology ,Gross morphology ,intervertebral disc ,business ,Neuroscience ,RD701-811 ,Large animal - Abstract
Preclinical studies involving large animal models aim to recapitulate the clinical situation as much as possible and bridge the gap from benchtop to bedside. To date, studies investigating intervertebral disc (IVD) degeneration and regeneration in large animal models have utilized a wide spectrum of methodologies for outcome evaluation. This paper aims to consolidate available knowledge, expertise, and experience in large animal preclinical models of IVD degeneration to create a comprehensive tool box of anatomical and functional outcomes. Herein, we present a Large Animal IVD Scoring Algorithm based on three scales: macroscopic (gross morphology, imaging, and biomechanics), microscopic (histological, biochemical, and biomolecular analyses), and clinical (neurologic state, mobility, and pain). The proposed algorithm encompasses a stepwise evaluation on all three scales, including spinal pain assessment, and relevant structural and functional components of IVD health and disease. This comprehensive tool box was designed for four commonly used preclinical large animal models (dog, pig, goat, and sheep) in order to facilitate standardization and applicability. Furthermore, it is intended to facilitate comparison across studies while discerning relevant differences between species within the context of outcomes with the goal to enhance veterinary clinical relevance as well. Current major challenges in pre‐clinical large animal models for IVD regeneration are highlighted and insights into future directions that may improve the understanding of the underlying pathologies are discussed. As such, the IVD research community can deepen its exploration of the molecular, cellular, structural, and biomechanical changes that occur with IVD degeneration and regeneration, paving the path for clinically relevant therapeutic strategies., The basic tool box entailing clinical, macroscopic, and microscopic scale outcomes was developed to guide preclinical large animal studies in the field of disc‐related spinal pain. In depth understanding of the intricate relationship between molecular, cellular, structural, and biomechanical changes that occur with IVD degeneration and regeneration will help pave the path for clinically relevant therapeutic strategies in the field.
- Published
- 2021
- Full Text
- View/download PDF
4. A bovine nucleus pulposus explant culture model.
- Author
-
Salzer E, Mouser VHM, Tryfonidou MA, and Ito K
- Subjects
- Animals, Cattle, Glycosaminoglycans metabolism, Proteoglycans metabolism, Intervertebral Disc pathology, Intervertebral Disc Degeneration pathology, Low Back Pain pathology, Nucleus Pulposus metabolism
- Abstract
Low back pain is a global health problem that is frequently caused by intervertebral disc degeneration (IVDD). Sulfated glycosaminoglycans (sGAGs) give the healthy nucleus pulposus (NP) a high fixed charge density (FCD), which creates an osmotic pressure that enables the disc to withstand high compressive forces. However, during IVDD sGAG reduction in the NP compromises biomechanical function. The aim of this study was to develop an ex vivo NP explant model with reduced sGAG content and subsequently investigate biomechanical restoration via injection of proteoglycan-containing notochordal cell-derived matrix (NCM). Bovine coccygeal NP explants were cultured in a bioreactor chamber and sGAG loss was induced by chondroitinase ABC (chABC) and cultured for up to 14 days. Afterwards, diurnal loading was studied, and explant restoration was investigated via injection of NCM. Explants were analyzed via histology, biochemistry, and biomechanical testing via stress relaxation tests and height measurements. ChABC injection induced dose-dependent sGAG reduction on Day 3, however, no dosing effects were detected after 7 and 14 days. Diurnal loading reduced sGAG loss after injection of chABC. NCM did not show an instant biomechanical (equilibrium pressure) or biochemical (FCD) restoration, as the injected fixed charges leached into the medium, however, NCM stimulated proliferation and increased Alcian blue staining intensity and matrix organization. NCM has biological repair potential and biomaterial/NCM combinations, which could better entrap NCM within the NP tissue, should be investigated in future studies. Concluding, chABC induced progressive, time-, dose- and loading-dependent sGAG reduction that led to a loss of biomechanical function. Keywords biomechanics | intervertebral disc | matrix degradation | low back pain | proteoglycans., (© 2021 The Authors. Journal of Orthopaedic Research® published by Wiley Periodicals LLC on behalf of Orthopaedic Research Society.)
- Published
- 2022
- Full Text
- View/download PDF
Catalog
Discovery Service for Jio Institute Digital Library
For full access to our library's resources, please sign in.