Evidence map›Paper›PMID 30721733›Full record

ArticleOsteoarthritis and cartilage2019

Nutrient supply and nucleus pulposus cell function: effects of the transport properties of the cartilage endplate and potential implications for intradiscal biologic therapy.

J Wong, S L Sampson, H Bell-Briones, A Ouyang, A A Lazar, J C Lotz, A J Fields

Abstract read
In one paragraph

Article in Osteoarthritis and cartilage, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 74 papers.

0numbers the graph read from it
0cells of the map it votes in
74citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

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.

2 · The registry

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.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

74 citing papers in PubMed.

  1. Trial
  2. Article
  3. Article
  4. Advances in the study of macrophage polarization in intervertebral disc degeneration.European spine journal : official publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society · 2026
    Review
  5. Review
  6. Review
  7. Article
  8. Article
  9. Review
  10. DDRGK1 preserves intervertebral disc development through ufmylation.Cellular and molecular life sciences : CMLS · 2025
    Article
  11. Article
  12. Review
  13. Review
  14. Review
  15. Article
  16. Review
  17. Review
  18. Article
  19. Review
  20. Review

14 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

7 authors.

J WongDepartment of Orthopaedic Surgery, University of California San Francisco, USA. Electronic address: jason.wong@ucsf.edu.
S L SampsonDepartment of Orthopaedic Surgery, University of California San Francisco, USA. Electronic address: sara.sampson@ucsf.edu.
H Bell-BrionesDepartment of Orthopaedic Surgery, University of California San Francisco, USA. Electronic address: hibellb@gmail.com.
A OuyangDepartment of Orthopaedic Surgery, University of California San Francisco, USA. Electronic address: ann.ouyang@berkeley.edu.
A A LazarDepartment of Preventative and Restorative Dental Sciences, University of California San Francisco, USA; Department of Epidemiology and Biostatistics, University of California San Francisco, USA. Electronic address: ann.lazar@ucsf.edu.
J C LotzDepartment of Orthopaedic Surgery, University of California San Francisco, USA. Electronic address: jeffrey.lotz@ucsf.edu.
A J FieldsDepartment of Orthopaedic Surgery, University of California San Francisco, USA. Electronic address: aaron.fields@ucsf.edu.

Funding

Clinical and Translational Science InstituteUL1TR001872 · NCATS · UNIVERSITY OF CALIFORNIA, SAN FRANCISCO · PI COLLARD, HAROLD R, JACOBY, VANESSA · 2016 to 2025
$112.1M
UCSF Core Center for Musculoskeletal Biology and MedicineP30AR066262 · NIAMS · UNIVERSITY OF CALIFORNIA, SAN FRANCISCO · PI MAJUMDAR, SHARMILA · 2014 to 2018
$3.0M
Role of the cartilage endplate in spinal disc degenerationR01AR070198 · NIAMS · UNIVERSITY OF CALIFORNIA, SAN FRANCISCO · PI FIELDS, AARON J · 2017 to 2021
$1.7M
NCATS NIH HHS UL1 TR001872NIAMS NIH HHS P30 AR066262NIAMS NIH HHS R01 AR070198
6 · The paper itself

Abstract

objectiveIntradiscal biologic therapy is a promising strategy for managing intervertebral disc degeneration. However, these therapies require a rich nutrient supply, which may be limited by the transport properties of the cartilage endplate (CEP). This study investigated how fluctuations in CEP transport properties impact nutrient diffusion and disc cell survival and function.

designHuman CEP tissues harvested from six fresh cadaveric lumbar spines (38-66 years old) were placed at the open sides of diffusion chambers. Bovine nucleus pulposus (NP) cells cultured inside the chambers were nourished exclusively by nutrients diffusing through the CEP tissues. After 72 h in culture, depth-dependent NP cell viability and gene expression were measured, and related to CEP transport properties and biochemical composition determined using fluorescence recovery after photobleaching and Fourier transform infrared (FTIR) spectroscopy.

resultsSolute diffusivity varied nearly 4-fold amongst the CEPs studied, and chambers with the least permeable CEPs appeared to have lower aggrecan, collagen-2, and matrix metalloproteinase-2 gene expression, as well as a significantly shorter viable distance from the CEP/nutrient interface. Increasing chamber cell density shortened the viable distance; however, this effect was lost for low-diffusivity CEPs, which suggests that these CEPs may not provide enough nutrient diffusion to satisfy cell demands. Solute diffusivity in the CEP was associated with biochemical composition: low-diffusivity CEPs had greater amounts of collagen and aggrecan, more mineral, and lower cross-link maturity.

conclusionsCEP transport properties dramatically affect NP cell survival/function. Degeneration-related CEP matrix changes could hinder the success of biologic therapies that require increased nutrient supply.

Indexed as

AdultAgedAggrecansAnimalsBiological TransportCadaverCartilage, ArticularCattleCell SurvivalCell TransplantationCollagen Type IICulture TechniquesDiffusion Chambers, CultureFluorescence Recovery After PhotobleachingGene ExpressionGenetic TherapyAggrecansCollagen Type IIIntercellular Signaling Peptides and ProteinsMatrix Metalloproteinase 2NutrientsPlant ExtractsREGOPARCartilage endplateDisc degenerationFourier transform infrared imagingLow back painNucleus pulposus cellNutrient transport

Identifiers

PMID30721733
PMCPMC6536352

What OpenQuestion holds

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Registered trials

None linked

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.