Evidence map›Paper›PMID 32594231›Full record

ArticleEuropean spine journal : official publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society2021

Fat infiltration in the multifidus muscle is related to inflammatory cytokine expression in the muscle and epidural adipose tissue in individuals undergoing surgery for intervertebral disc herniation.

Greg James, Xiaolong Chen, Ashish Diwan, Paul W Hodges

Abstract read
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In one paragraph

Article in 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, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 47 papers, 3 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
47citing papers in PubMed, 3 pooled it
6.5field-weighted citation impact, top 2% of its field
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

47 citing papers in PubMed, 3 syntheses or guidelines pooled it, 66 citations in OpenAlex.

  1. Paraspinal muscle quality in chronic low back pain: a systematic review and meta-analysis of muscle atrophy and fat infiltration.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
    Pooled it
  2. Pooled it
  3. The association between changes in multifidus muscle morphology and back pain scores following discectomy surgery for lumbar disc herniation: a systematic review and meta-analysis.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 · 2022
    Pooled it
  4. Article
  5. Altered myogenic and lipid metabolism gene expression in paraspinal muscles of patients with adult spinal deformity who develop proximal junctional failure.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
    Article
  6. Real-world two-year durability of restorative neurostimulation for treatment of multifidus dysfunction in patients with chronic low back pain: an observational German cohort study.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
    Observational
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  15. FAPs orchestrate homeostasis of muscle physiology and pathophysiology.FASEB journal : official publication of the Federation of American Societies for Experimental Biology · 2024
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  18. Targeted multifidus muscle activation reduces fibrosis of multifidus muscle following intervertebral disc injury.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 · 2024
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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

4 authors at 2 institutions in 1 country.

Greg JamesSchool of Health and Rehabilitation Sciences, The University of Queensland, Brisbane, QLD, 4072, Australia.
Xiaolong ChenSpine Service and Spine Labs, St George and Sutherland Clinical School, UNSW Medicine, The University of New South Wales, Sydney, NSW, 2052, Australia.
Ashish DiwanSpine Service and Spine Labs, St George and Sutherland Clinical School, UNSW Medicine, The University of New South Wales, Sydney, NSW, 2052, Australia.
Paul W HodgesSchool of Health and Rehabilitation Sciences, The University of Queensland, Brisbane, QLD, 4072, Australia. p.hodges@uq.edu.au.
University of Queensland · AUUNSW Sydney · AU

Funding

National Health and Medical Research Council APP1091302National Health and Medical Research Council APP1102905
6 · The paper itself

Abstract

purposeRecent animal studies have discovered dysregulation of local inflammatory activity as a novel mechanism to explain fat and connective tissue accumulation in the multifidus muscle in association with intervertebral disc (IVD) degeneration/injury. This study aimed to test whether similar mechanisms are active in humans by investigation of whether expression of inflammatory genes in the multifidus muscle differed between individuals with low and high levels of intra-muscular fat in the muscle. The secondary aims were to compare inflammatory gene expression in the intra-muscular, subcutaneous and epidural fat between groups.

methodsMuscle and fat were procured from 24 individuals undergoing spine surgery for IVD herniation. Gene expression was quantified using qPCR assays. Participants were allocated to high- and low-fat infiltration groups based on clinical assessment of multifidus fat using Kjaer grading of MRI.

resultsTNF expression in the multifidus muscle was greater in participants with high rather than low levels of fat infiltration. This group also had greater expression of leptin, but lower arginase-1 (marker of anti-inflammatory M2 macrophages) in intra-muscular and subcutaneous adipose tissue, and greater expression of TNF, adiponectin and nitric oxide synthase 2 (marker of pro-inflammatory M1 macrophages) in epidural fat.

conclusionThe results support the hypothesis that IVD degeneration is associated with dysregulation of the inflammatory state of the local multifidus muscle, which provides initial evidence for translation of some, but not all, observations from recent animal studies to humans. Discovery of inflammatory dysregulation in epidural adipose tissue has potential for broad impact on tissue health and LBP symptoms.

Indexed as

Intervertebral DiscIntervertebral Disc DegenerationAdipose TissueAnimalsCytokinesHumansLumbar VertebraeParaspinal MusclesCytokinesFat infiltrationIntervertebral disc herniationMultifidus musclePro-inflammatory cytokineTumour necrosis factor

Identifiers

PMID32594231
OpenAlexW3037810330

What OpenQuestion holds

Textmetadata
Read underepoch 390

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.