When scientists removed a tiny gene regulator called miR-155 from mice that lacked vitamin D receptors, the mice’s immune systems didn’t go into overdrive anymore. This suggests that too much of this gene regulator is what makes the inflammation worse when vitamin D is low.
See the scientific wording
Deletion of microRNA-155 in mice reduces the hyperinflammatory response induced by vitamin D receptor deficiency, indicating that overexpression of microRNA-155 is necessary for the exaggerated inflammation observed in vitamin D-deficient macrophages.
Correlational — new studies may shift this
ObservationalOne low-scoring study links this claim to the outcome, but causation is not established.
What the research says
1 study reviewedSupporting (1)
Case-Control StudyAnimal2013
When mice don’t have enough vitamin D signaling, their immune cells go into overdrive because a tiny molecule called miR-155 gets too active. When scientists removed miR-155, the overactive inflammation stopped — proving miR-155 is the culprit.
Contradicting (0)
No contradicting studies found yet
That doesn't mean it's settled — it just means no study has tested the opposite.
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Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting study
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When scientists removed a tiny gene regulator called miR-155 from mice that lacked vitamin D receptors, the mice’s immune systems didn’t go into overdrive anymore. This suggests that too much of this gene regulator is what makes the inflammation worse when vitamin D is low.
Evidence from Studies
Supporting (1)
Community contributions welcome
1,25-Dihydroxyvitamin D Promotes Negative Feedback Regulation of TLR Signaling via Targeting MicroRNA-155–SOCS1 in Macrophages
When mice don’t have enough vitamin D signaling, their immune cells go into overdrive because a tiny molecule called miR-155 gets too active. When scientists removed miR-155, the overactive inflammation stopped — proving miR-155 is the culprit.
1 study stuck in processing — a maintainer can requeue it.
Contradicting (0)
Community contributions welcome
1 study has been processing far longer than a normal run. The pipeline may be stuck — a maintainer can requeue it, and the results will appear here once it finishes.
Score Breakdown
No multi-axis breakdown available yet. The overall Pro / Against score above is the best signal.
- No clinical evidence is available; the score reflects mechanistic plausibility only.
What Would Prove This
Per GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this claim, ordered from strongest to weakest.
Systematic Review of MicroRNA-155 Knockout Models in Vitamin D Deficiency-Induced Macrophage Inflammation
Systematic review and meta-analysis of all peer-reviewed studies comparing miR-155 knockout versus wild-type mice with vitamin D receptor deficiency, measuring macrophage inflammatory markers (e.g., TNF-α, IL-6) across multiple labs and protocols.
Randomized Controlled Trial of miR-155 Inhibition vs Control in Vitamin D Receptor Knockout Mice with Induced Macrophage Inflammation
Randomized assignment of vitamin D receptor knockout mice to receive miR-155 inhibitor (e.g., antagomir) or control (scrambled oligonucleotide), with macrophage cytokine output measured after 4 weeks of treatment under standardized vitamin D-deficient diet.
Longitudinal Cohort Study of miR-155 Expression Levels and Inflammatory Markers in Vitamin D-Deficient Mice Over Time
Prospective tracking of miR-155 expression and inflammatory cytokine levels in a cohort of vitamin D receptor-deficient mice over 12 weeks, comparing those with naturally high vs low miR-155 expression.
In Vitro Knockdown of miR-155 in Human Macrophages Under Vitamin D-Deficient Conditions
Human macrophages derived from monocytes cultured in vitamin D-deficient media, with miR-155 knocked down via siRNA, measuring IL-1β, TNF-α, and NF-κB activation over 48 hours.
Case Study of miR-155 Overexpression in Vitamin D-Deficient Mice Leading to Exaggerated Macrophage Inflammation
Vitamin D-deficient mice injected with miR-155 mimics in macrophages, compared to control mice injected with scrambled RNA, measuring inflammatory markers in spleen and peritoneal macrophages after 7 days.