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Cherif H, Li L, Snuggs J, Li X, Sammon C, Li J, Beckman L, Haglund L, Le Maitre CL. Injectable hydrogel induces regeneration of naturally degenerate human intervertebral discs in a loaded organ culture model. Acta Biomater 2024; 176:201-220. [PMID: 38160855 DOI: 10.1016/j.actbio.2023.12.041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2023] [Revised: 11/30/2023] [Accepted: 12/22/2023] [Indexed: 01/03/2024]
Abstract
Low back pain resulting from disc degeneration is a leading cause of disability worldwide. However, to date few therapies target the cause and fail to repair the intervertebral disc (IVD). This study investigates the ability of an injectable hydrogel (NPgel), to inhibit catabolic protein expression and promote matrix expression in human nucleus pulposus (NP) cells within a tissue explant culture model isolated from degenerate discs. Furthermore, the injection capacity of NPgel into naturally degenerate whole human discs, effects on mechanical function, and resistance to extrusion during loading were investigated. Finally, the induction of potential regenerative effects in a physiologically loaded human organ culture system was investigated following injection of NPgel with or without bone marrow progenitor cells. Injection of NPgel into naturally degenerate human IVDs increased disc height and Young's modulus, and was retained during extrusion testing. Injection into cadaveric discs followed by culture under physiological loading increased MRI signal intensity, restored natural biomechanical properties and showed evidence of increased anabolism and decreased catabolism with tissue integration observed. These results provide essential proof of concept data supporting the use of NPgel as an injectable therapy for disc regeneration. STATEMENT OF SIGNIFICANCE: Low back pain resulting from disc degeneration is a leading cause of disability worldwide. However, to date few therapies target the cause and fail to repair the intervertebral disc. This study investigated the potential regenerative properties of an injectable hydrogel system (NPgel) within human tissue samples. To mimic the human in vivo conditions and the unique IVD niche, a dynamically loaded intact human disc culture system was utilised. NPgel improved the biomechanical properties, increased MRI intensity and decreased degree of degeneration. Furthermore, NPgel induced matrix production and decreased catabolic factors by the native cells of the disc. This manuscript provides evidence for the potential use of NPgel as a regenerative biomaterial for intervertebral disc degeneration.
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Affiliation(s)
- Hosni Cherif
- Department of Surgery, McGill University, Montreal, QC H3G 1A4, Canada
| | - Li Li
- Department of Surgery, McGill University, Montreal, QC H3G 1A4, Canada
| | - Joseph Snuggs
- Oncology and Metabolism Department, Medical School, & INSIGNEO Institute, University of Sheffield, Sheffield, UK; Biomolecular Sciences Research Centre, Sheffield Hallam University, Sheffield, UK
| | - Xuan Li
- Department of Mechanical Engineering, McGill University, Montreal, QC H3A 0C3, Canada
| | - Christopher Sammon
- Materials and Engineering Research Institute, Sheffield Hallam University, Sheffield, UK
| | - Jianyu Li
- Department of Surgery, McGill University, Montreal, QC H3G 1A4, Canada; Department of Mechanical Engineering, McGill University, Montreal, QC H3A 0C3, Canada; Department of Biomedical Engineering, McGill University, Montreal, QC H3A 2B4, Canada
| | - Lorne Beckman
- Department of Surgery, McGill University, Montreal, QC H3G 1A4, Canada
| | - Lisbet Haglund
- Department of Surgery, McGill University, Montreal, QC H3G 1A4, Canada; Shriners Hospital for Children, Montreal, QC H4A 0A9, Canada
| | - Christine L Le Maitre
- Oncology and Metabolism Department, Medical School, & INSIGNEO Institute, University of Sheffield, Sheffield, UK; Biomolecular Sciences Research Centre, Sheffield Hallam University, Sheffield, UK.
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Quang TT, Yang J, Mikhail AS, Wood BJ, Ramanujam N, Mueller JL. Locoregional Thermal and Chemical Tumor Ablation: Review of Clinical Applications and Potential Opportunities for Use in Low- and Middle-Income Countries. JCO Glob Oncol 2023; 9:e2300155. [PMID: 37625104 PMCID: PMC10581629 DOI: 10.1200/go.23.00155] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2023] [Revised: 05/31/2023] [Accepted: 07/01/2023] [Indexed: 08/27/2023] Open
Abstract
This review highlights opportunities to develop accessible ablative therapies to reduce the cancer burden in LMICs.
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Affiliation(s)
- Tri T. Quang
- Department of Bioengineering, University of Maryland, College Park, MD
| | - Jeffrey Yang
- Department of Bioengineering, University of Maryland, College Park, MD
- Center for Interventional Oncology, Radiology and Imaging Sciences, NIH Clinical Center, National Cancer Institute, National Institutes of Health, Bethesda, MD
| | - Andrew S. Mikhail
- Center for Interventional Oncology, Radiology and Imaging Sciences, NIH Clinical Center, National Cancer Institute, National Institutes of Health, Bethesda, MD
| | - Bradford J. Wood
- Center for Interventional Oncology, Radiology and Imaging Sciences, NIH Clinical Center, National Cancer Institute, National Institutes of Health, Bethesda, MD
| | - Nimmi Ramanujam
- Department of Biomedical Engineering, Duke University, Durham, NC
- Duke Global Health Institute, Duke University, Durham, NC
- Department of Pharmacology and Cancer Biology, Duke University, Durham, NC
| | - Jenna L. Mueller
- Department of Bioengineering, University of Maryland, College Park, MD
- Department of OB-GYN and Reproductive Science, University of Maryland School of Medicine, Baltimore, MD
- Marlene and Stewart Greenebaum Cancer Center, University of Maryland School of Medicine, Baltimore, MD
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Gogos C, Filippiadis DK, Velonakis G, Kelekis N, Papagelopoulos P, Kelekis A. Intradiscal Gelified Ethanol Nucleolysis versus Endoscopic Surgery for Lumbar Disc Herniation Radiculopathy. Diagnostics (Basel) 2023; 13:2164. [PMID: 37443558 DOI: 10.3390/diagnostics13132164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2023] [Revised: 06/02/2023] [Accepted: 06/19/2023] [Indexed: 07/15/2023] Open
Abstract
The purpose of this study was to retrospectively compare efficacy and safety between intradiscal injection of a gelified ethanol product and tubular discectomy in the treatment of intervertebral disk herniation. A bi-central institutional database research identified forty (40) patients suffering from symptomatic contained disc herniation. Nucleolysis Group included 20 patients [mean 50.05 ± 9.27 years-of-age (male/female 14/6-70/30%)] and Surgery Group included 20 patients [mean 48.45 ± 14.53 years-of-age, (male/female 12/8-60/40%)]. Primary outcome was overall 12-month improvement over baseline in leg pain (NVS units). Procedural technical outcomes were recorded, and adverse events were evaluated at all follow-up intervals. CIRSE classification system was used for complications' reporting. Mean pre-operative pain score in Nucleolysis Group was 7.95 ± 0.94 reduced to 1.25 ± 1.11 at month 1 and 0.45 ± 0.75 NVS units at year 1. Mean pre-operative pain score in Surgery Group was 7.65 ± 1.13 reduced to 1.55 ± 1.79 at month 1 and 0.70 ± 1.38 NVS units at year 1. Pain decrease was statistically significant after both procedures (p < 0.001). There was no statistically significant difference between pain reduction in both groups (p = 0.347). The decrease differences of the pain effect upon general activities, sleeping, socializing, walking, and enjoying life in the follow-up period between the two groups were not statistically significant. No complications were noted in both groups. Results from the current study report that intradiscal injection of a gelified ethanol and tubular discectomy were equally effective on terms of efficacy and safety for the treatment of symptomatic lumbar intervertebral disc herniation regarding the 12-month mean leg pain improvement. Both achieved similar rapid significant clinical improvement persisting throughout follow-up period.
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Affiliation(s)
- Christos Gogos
- Neurosurgery Clinic, General Hospital "Asklepieio", 16673 Athens, Greece
| | - Dimitrios K Filippiadis
- 2nd Department of Radiology, University General Hospital "ATTIKON", Medical School, National and Kapodistrian University of Athens, 12462 Athens, Greece
| | - Georgios Velonakis
- 2nd Department of Radiology, University General Hospital "ATTIKON", Medical School, National and Kapodistrian University of Athens, 12462 Athens, Greece
| | - Nikolaos Kelekis
- 2nd Department of Radiology, University General Hospital "ATTIKON", Medical School, National and Kapodistrian University of Athens, 12462 Athens, Greece
| | - Panayiotis Papagelopoulos
- Orthopaedic Surgery & Traumatology, University General Hospital "ATTIKON", Medical School, National and Kapodistrian University of Athens, 12462 Athens, Greece
| | - Alexis Kelekis
- 2nd Department of Radiology, University General Hospital "ATTIKON", Medical School, National and Kapodistrian University of Athens, 12462 Athens, Greece
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Physiological Features of Musculoskeletal System Formation of Adolescents Under the Influence of Directed Physical Training. PHYSICAL ACTIVITY AND HEALTH 2023. [DOI: 10.5334/paah.217] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
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