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Spinal cord injury can reshape gut microbes that influence whole-body health (opens in a new tab)

medicalxpress.com · 2026-10-29

Short answerEvidenceSource

Short answer

Not supported

Not supported.

One key claim is not backed by the study. 4 other points were not covered by the paper.

  • 1 not supported
  • 4 not covered

Checked against the study summary. The full text wasn't available, so some details couldn't be settled either way.

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NewsLink checks it

Not supported

One claim isn't supported by the study. Four claims the study doesn't address.

  • 1 not supported
  • 4 not covered
Open claim evidence
3
Source paper

Source layer

The 2 papers the story cites

Source study separated from background citations.

The research anchor for the report.

Then inspect each claim

Evidence layer

Claim by claim

Each claim gets a verdict. Expand it to see the evidence directly below.

5 claims in this story

Showing all 5 claimsChoose a verdict to focus the list.

Claim 1 of 5Not supportedA second study identified 19 microbial species in the mouse gut with the strongest links to the body's loss of nitrogen after spinal cord injury, which is associated with muscle wasting in humans.View evidenceHide evidence

As stated19 microbial species

Why this verdict

The supplied paper profile contains no evidence about a second study identifying 19 microbial species linked to nitrogen loss after spinal cord injury, nor any nitrogen-loss or muscle-wasting analysis. This may concern another paper, but it is not supported by the supplied PaperScientificProfile.

Claim 2 of 5Not coveredIn mice, refeeding a strain of bacteria that was depleted after spinal cord injury lowered inflammation and stabilized weight loss.View evidenceHide evidence

Why this verdict

The abstract-level profile supports that Lactobacillus johnsonii was depleted after spinal cord–gut disruption and that feeding purified L. johnsonii to spinal cord–injured mice prevented systemic inflammation and metabolic defects. However, the specific story framing that it 'stabilized weight loss' is not present in the abstract-level evidence provided. The causal animal-intervention part is directionally supported for inflammation/metabolic outcomes, but the weight-loss component is not verifiable at this depth.

1

Study evidence

Surgical disruption of the spinal cord–gut axis produced persistent, lesion-severity-, sex-, and time-specific shifts in gut microbial community composition in C57BL/6 mice.

“333 samples from male and female C57BL/6 mice collected before and up to six months after surgical disruption of the spinal cord-gut axis.”
2

Study evidence

Feeding purified Lactobacillus johnsonii to spinal cord–injured mice prevented metabolic defects and systemic inflammation caused by disruption of the spinal cord–gut axis.

“Feeding purified L. johnsonii to spinal cord-injured mice prevented metabolic defects and systemic inflammation caused by disruption of the spinal cord-gut axis.”
Claim 3 of 5Not coveredThe research was reported in recent articles appearing in npj Biofilms and Microbiomes and Communications Biology.View evidenceHide evidence

Why this verdict

The supplied profile is an abstract-level scientific profile and does not provide enough bibliographic/journal information to verify that the research appeared in npj Biofilms and Microbiomes and Communications Biology. It also profiles only one document, so the two-article framing cannot be verified from the supplied evidence.

Claim 4 of 5Not coveredThe studies used genome-resolved metagenomics and 333 fecal samples from mice to assemble 6,635 microbial draft genomes representing much of the mouse gut microbiome after spinal cord injury.View evidenceHide evidence

As stated333 fecal samples; 6,635 microbial draft genomes; 80% of the gut microbiome

Why this verdict

The profile supports genome-resolved metagenomics, 333 fecal samples, and assembly of 6,635 microbial draft genomes into a Mouse B6 Gut Catalog. However, the presentation's stated magnitude includes '80% of the gut microbiome,' which is not in the abstract-level profile. Thus the main counts are supported, but the coverage claim is not verifiable at this depth.

1

Study evidence

Surgical disruption of the spinal cord–gut axis produced persistent, lesion-severity-, sex-, and time-specific shifts in gut microbial community composition in C57BL/6 mice.

“333 samples from male and female C57BL/6 mice collected before and up to six months after surgical disruption of the spinal cord-gut axis.”
2

Study evidence

A new "Mouse B6 Gut Catalog" of 6,635 microbial draft genomes was produced and is described as significantly expanding species- and strain-level representation for C57BL/6 mice.

“This resulted in 6,635 microbial draft genomes as a foundation for a new ‘Mouse B6 Gut Catalog’ that significantly expands species and strain representation for this widely used laboratory mouse strain.”
Claim 5 of 5Not coveredThe article says the findings differed by injury level, sex, and time after injury, and that restoring Lactobacillus johnsonii alone may not be enough because microbial partners may also be needed.View evidenceHide evidence

Why this verdict

The profile supports that microbiome shifts differed by lesion severity, sex, and time after injury. It also supports genome-inferred altered carbohydrate sharing/utilization among microbes as a hypothesis related to L. johnsonii depletion. But the stronger interpretation that restoring L. johnsonii alone may not be enough and that microbial partners may be needed is not directly established in the abstract-level profile; the abstract instead reports that purified L. johnsonii feeding prevented metabolic defects and systemic inflammation in mice.

1

Study evidence

Surgical disruption of the spinal cord–gut axis produced persistent, lesion-severity-, sex-, and time-specific shifts in gut microbial community composition in C57BL/6 mice.

“333 samples from male and female C57BL/6 mice collected before and up to six months after surgical disruption of the spinal cord-gut axis.”
2

Study evidence

Feeding purified Lactobacillus johnsonii to spinal cord–injured mice prevented metabolic defects and systemic inflammation caused by disruption of the spinal cord–gut axis.

“Feeding purified L. johnsonii to spinal cord-injured mice prevented metabolic defects and systemic inflammation caused by disruption of the spinal cord-gut axis.”
Then look for missing context

Context layer

What the story carried across

Nothing material from the study was dropped.

7 things the story did carry across
  • Surgical disruption of the spinal cord–gut axis in C57BL/6 mice caused persistent microbiome shifts that varied by lesion severity, sex, and time, with consistent depletion of Lactobacillus johnsonii.
  • The study used genome-resolved metagenomics on 333 longitudinal fecal samples collected before and up to six months after surgery.
  • The paper generated 6,635 microbial draft genomes as a Mouse B6 Gut Catalog expanding species- and strain-level representation for C57BL/6 mice.
  • Feeding purified Lactobacillus johnsonii to spinal cord–injured mice prevented metabolic defects and systemic inflammation.
  • Genome-resolved and community metabolic profiling inferred altered carbohydrate sharing and utilization among gut microbes as a possible mechanism contributing to L. johnsonii depletion.
  • All findings are from an experimental C57BL/6 mouse model and may not generalize to humans.
  • Mechanistic interpretations about carbohydrate sharing and L. johnsonii depletion are genome-inferred hypotheses rather than experimentally demonstrated causal mechanisms.
Then read the study layer

Study layer

Study at a glance

Scan the study first. Expand only the parts you want to inspect.

Pieces of work

4

Evidence read

study summary

Lead result

in vivo animal

1Lead resultin vivo animalSurgical disruption of the spinal cord–gut axis in C57BL/6 mice causes persistent, lesion-severity-, sex-, and time-specific shifts in gut microbiome composition, including consistent depletion of Lactobacillus johnsonii, characterized with genome-resolved metagenomics over 6 months.Longitudinal in vivo mouse surgical perturbation with genome-resolved metagenomicsExpand

In plain English

Longitudinal in vivo study in C57BL/6 mice using genome-resolved metagenomics on 333 fecal samples collected before and up to six months after surgical disruption of the spinal cord–gut axis. The intervention produced persistent, lesion-severity-, sex-, and time-specific shifts in gut community composition with a consistent depletion of Lactobacillus johnsonii, and yielded 6,635 microbial draft genomes comprising a new Mouse B6 Gut Catalog.

Key findings

  • Surgical disruption of the spinal cord–gut axis produced persistent, lesion-severity-, sex-, and time-specific shifts in gut microbial community composition in C57BL/6 mice.
  • There was a consistent depletion of Lactobacillus johnsonii following disruption of spinal cord–gut signaling.
“333 samples from male and female C57BL/6 mice collected before and up to six months after surgical disruption of the spinal cord-gut axis.”
What this piece can’t prove
  • All results derive from an experimental C57BL/6 mouse model and may not generalize to other mouse strains or to humans.
  • The abstract does not provide quantitative effect sizes, detailed statistical methods, or full breakdowns of sample numbers across lesion severity, sex, and time strata.

1 further detail could not be confirmed from the summary.

2in silicoA large genome-resolved metagenomics effort yields a substantially expanded reference resource (“Mouse B6 Gut Catalog”) comprising thousands of microbial draft genomes from longitudinal mouse gut samples.Metagenome assembly, binning, and catalog curationExpand

In plain English

The study reports creation of a genome-resolved reference resource, the "Mouse B6 Gut Catalog", built from metagenomes of C57BL/6 mouse gut samples (333 longitudinal samples) and comprising 6,635 microbial draft genomes; the catalog is presented as substantially expanding species- and strain-level representation for this laboratory mouse strain.

Key findings

  • A new "Mouse B6 Gut Catalog" of 6,635 microbial draft genomes was produced and is described as significantly expanding species- and strain-level representation for C57BL/6 mice.
“This resulted in 6,635 microbial draft genomes as a foundation for a new ‘Mouse B6 Gut Catalog’ that significantly expands species and strain representation for this widely used laboratory mouse strain.”
What this piece can’t prove

3 further details could not be confirmed from the summary.

3in vivo animalOral administration of purified Lactobacillus johnsonii to spinal cord–injured mice mitigates metabolic defects and systemic inflammation attributed to spinal cord–gut axis disruption.in vivo mouse probiotic interventionExpand

In plain English

In C57BL/6 mice with surgically disrupted spinal cord–gut signaling, oral administration of purified Lactobacillus johnsonii prevented metabolic defects and systemic inflammation attributed to the spinal cord–gut axis disruption, as reported in the abstract.

Key findings

  • Feeding purified Lactobacillus johnsonii to spinal cord–injured mice prevented metabolic defects and systemic inflammation caused by disruption of the spinal cord–gut axis.
“Feeding purified L. johnsonii to spinal cord-injured mice prevented metabolic defects and systemic inflammation caused by disruption of the spinal cord-gut axis.”
What this piece can’t prove

3 further details could not be confirmed from the summary.

4in silicoGenome-resolved and community metabolic profiling support a mechanism in which spinal cord–gut axis disruption alters carbohydrate cross-feeding/sharing and utilization among gut microbes, potentially contributing to L. johnsonii depletion.Expand

In plain English

Genome-resolved and community-level metabolic analyses of metagenomes from mice with disrupted spinal cord–gut signaling inferred altered carbohydrate sharing and utilization among gut microbes; these changes are proposed as a genome-inferred mechanism that could contribute to depletion of Lactobacillus johnsonii and motivate future experimental testing.

Key findings

  • Genome-resolved and community metabolic profiling indicated altered carbohydrate sharing and utilization among gut microbes after disruption of the spinal cord–gut axis.
  • The inferred alterations in carbohydrate utilization were proposed as a mechanism that could potentially contribute to depletion of Lactobacillus johnsonii.
“Analyses using genome-resolved and community-based metabolic profiling indicated altered carbohydrate sharing and utilization of gut microbes, potentially depleting L. johnsonii, providing a genome-inferred mechanism for future hypothesis testing.”
What this piece can’t prove
  • Analyses are genome-inferred and model-based; they do not provide direct experimental validation of altered carbohydrate fluxes or cross-feeding interactions.
  • Results depend on the quality, completeness, and taxonomic/functional annotation of reconstructed genomes used for metabolic inference.
  • Community metabolic profiling typically requires assumptions about metabolite exchange, resource availability, and growth conditions that may not fully reflect in vivo gut environments.
  • The abstract does not report quantitative effect sizes, validation experiments, or details of the modeling approaches, limiting assessment of robustness from abstract-only information.
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Papers considered

The selected paper, plus nearby candidates.

Crossref, Europe PMC, PubMed · 40 candidate papers

Candidate

Precision Prediction of Microbial Ecosystem Impact on Host Metabolism Using Genome-Resolved Metagenomics

Npj Biofilms and Microbiomes · 2026 · Crossref

Source (opens in a new tab)
Candidate

Electrical impedance for studying microbial biofilms: dynamics, disruption, and susceptibility

Npj Biofilms and Microbiomes · 2026 · Crossref

Source (opens in a new tab)
Candidate

A validation framework for translating ethnomicrobiology into microbiome-enabled desert restoration

Npj Biofilms and Microbiomes · 2026 · Crossref

Source (opens in a new tab)

And 34 more candidates considered.