Evidence map›Paper›PMID 34381975›Full record

ArticleiScience2021

Estrous cycle and ovariectomy-induced changes in visceral pain are microbiota-dependent.

Mónica Tramullas, James M Collins, Patrick Fitzgerald, Timothy G Dinan, Siobhain M O' Mahony, John F Cryan

Open access · goldAbstract read
In one paragraph

Article in iScience, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 24 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
24citing papers in PubMed, 1 pooled it
5.4field-weighted citation impact, top 3% 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

24 citing papers in PubMed, 1 synthesis or guideline pooled it, 40 citations in OpenAlex.

  1. Pooled it
  2. Article
  3. Article
  4. GABAExperimental physiology · 2026
    Article
  5. Article
  6. Article
  7. Article
  8. The gut-microbiota-brain axis: Focus on gut steroids.Journal of neuroendocrinology · 2025
    Review
  9. Article
  10. Article
  11. Article
  12. Neuroimmunophysiology of the gastrointestinal tract.American journal of physiology. Gastrointestinal and liver physiology · 2024
    Review
  13. Review
  14. Observational
  15. Review
  16. Review
  17. Article
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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

6 authors at 1 institution in 1 country.

Mónica TramullasAPC Microbiome Ireland, University College Cork, Cork, Ireland.
James M CollinsAPC Microbiome Ireland, University College Cork, Cork, Ireland.
Patrick FitzgeraldAPC Microbiome Ireland, University College Cork, Cork, Ireland.
Timothy G DinanAPC Microbiome Ireland, University College Cork, Cork, Ireland.
Siobhain M O' MahonyAPC Microbiome Ireland, University College Cork, Cork, Ireland.
John F CryanAPC Microbiome Ireland, University College Cork, Cork, Ireland.
University College Cork · IE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Visceral hypersensitivity (VH) is a hallmark of many functional gastrointestinal disorders including irritable bowel syndrome and is categorized by a dull, diffuse sensation of abdominal pain. Recently, the gut microbiota has been implicated in VH in male mice, but the effects in females have yet to be explored fully. To this end, we now show that somewhat surprisingly, female germ-free mice have similar visceral pain responses to colorectal distension (CRD) as their conventional controls. However, we show that although sensitivity to CRD is estrous cycle stage-dependent in conventional mice, it is not in germ-free mice. Further, ovariectomy (OVX) induced VH in conventional but not germ-free mice, and induced weight gain regardless of microbiota status. Finally, we show that estrogen-replacement ameliorated OVX-induced VH. Taken together, this study provides evidence for a major role of female sex hormones and the gut microbiota in sensation of visceral pain in females.

Indexed as

EndocrinologyMicrobiomeNeuroscience

Identifiers

PMID34381975
PMCPMC8333168
OpenAlexW3182782938

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.