ArticleJOR spine2023
Harmonization and standardization of nucleus pulposus cell extraction and culture methods.
Article in JOR spine, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 39 papers.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
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Who cites it
39 citing papers in PubMed, 51 citations in OpenAlex.
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- Defining the Human Nucleus Pulposus Microenvironment and Its Impact on Cell Matrix Synthesis and Metabolic Activity.JOR spine · 2026Article
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- The notochord: development, disease and stem cell-based modelling.Development (Cambridge, England) · 2026Review
- Restoring disc matrix homeostasis: Dual-miRNA and human platelet lysate as a novel therapeutic strategy.Materials today. Bio · 2026Article
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- Natural photosynthetic system for restoring homeostasis of animal organelle interaction network.Nature communications · 2026Article
- TIE2-positive cells in the nucleus pulposus with a purpose: the who, what and why.Journal of biomedical science · 2026Review
- Influence of the Intervertebral Disc Microenvironment on Matrix Synthesis and Metabolism in Goat Nucleus Pulposus Cells.JOR spine · 2026Article
- Cell-based therapies for intervertebral disc degeneration: Navigating the path from promise to clinical reality.Journal of orthopaedic translation · 2026Review
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- Macrophage Subtypes Distinctly Impact Intervertebral Disc Inflammation and Extracellular Matrix Composition.JOR spine · 2025Article
- Understanding the Physiological Behavior of Disc Cells in an In Vitro Imitation of the Healthy and Degenerated Disc Niche.JOR spine · 2025Article
- Intracellular Detection ofJOR spine · 2025Article
- Advancing Intervertebral Disc Biology via Omics: Implications for Nucleus Pulposus Progenitor Cell-Based Regeneration.JOR spine · 2025Review
- Safety of autologous nucleus pulposus cell transplantation with fibrin glue following endoscopic discectomy in chronic low back pain: a preliminary phase I trial.BMC musculoskeletal disorders · 2025Article
- Article
- Pure platelet-rich plasma delays intervertebral disc degeneration by activating SIRT1-mediated autophagy in nucleus pulposus cells.Journal of orthopaedic surgery and research · 2025Article
- Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
52 authors at 20 institutions in 9 countries.
Funding
Abstract
Background: In vitro studies using nucleus pulposus (NP) cells are commonly used to investigate disc cell biology and pathogenesis, or to aid in the development of new therapies. However, lab-to-lab variability jeopardizes the much-needed progress in the field. Here, an international group of spine scientists collaborated to standardize extraction and expansion techniques for NP cells to reduce variability, improve comparability between labs and improve utilization of funding and resources. Methods: The most commonly applied methods for NP cell extraction, expansion, and re-differentiation were identified using a questionnaire to research groups worldwide. NP cell extraction methods from rat, rabbit, pig, dog, cow, and human NP tissue were experimentally assessed. Expansion and re-differentiation media and techniques were also investigated. Results: Recommended protocols are provided for extraction, expansion, and re-differentiation of NP cells from common species utilized for NP cell culture. Conclusions: This international, multilab and multispecies study identified cell extraction methods for greater cell yield and fewer gene expression changes by applying species-specific pronase usage, 60-100 U/ml collagenase for shorter durations. Recommendations for NP cell expansion, passage number, and many factors driving successful cell culture in different species are also addressed to support harmonization, rigor, and cross-lab comparisons on NP cells worldwide.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.