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The Study

Gut microbiota-derived metabolite trimethylamine N-oxide and biomarkers of inflammation are linked to endothelial and coronary microvascular function in patients with inflammatory bowel disease

In simple terms

This study found that people with IBD who had more of a certain gut chemical (TMAO) and more inflammation tended to have worse blood vessel function — but it doesn’t prove that the chemical caused the problem. It’s like noticing that people who eat more ice cream also get more sunburns — they’re linked, but ice cream doesn’t cause sunburn.

44%

Analysis score

44/ 44

Maximum 44 for a cross-sectional study.

Where the score came from

Reporting0
Methodology28
Publication100
Statistical77
Study type (basis of the score)
Cross-Sectional Study
Level 4 - Case series
What’s the bottom line?

People with gut inflammation (IBD) have worse heart blood flow than healthy people. Their gut bacteria make a chemical called TMAO, and their bodies also show more inflammation — both are linked to weaker heart blood vessels.

Where does this study sit?

Systematic Reviews & Meta-analyses

Max 100

Randomized Trials

Max 90

Cohort Studies

Max 72

Case-Control

Max 58

Cross-Sectional

Max 44

Case Reports & Series

Max 30

Expert Opinion

Max 5
StrongerWeaker
Case Reports & Series
Level 4
44

44 / 100

Quality score

Detailed descriptions of individual patients or small groups. Valuable for identifying new conditions or side effects, but cannot establish generalizable conclusions.

Cannot establish causation

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Key takeaways

Summary

Based on the study abstract and findings.

  1. 1Yes — even small drops in heart blood flow can signal early heart disease risk, especially in people with chronic gut inflammation.
  2. 2IBD patients had heart blood flow (CFVR) of 2.07 vs.
  3. 32.30 in healthy people.
  4. 4TMAO levels were linked to worse heart flow (r=-0.30).
  5. 5WBC count was even more linked (r=-0.37).
  6. 6In UC, TMAO was strongly linked to both heart flow (r=-0.55) and artery flexibility (r=-0.60).

Score breakdown, methodology, conflicts of interest, evidence analysis & raw study data

Publication

Journal

Microvascular Research

Year

2023

Authors

Seref Kul, Zuhal Caliskan, Tolga Sinan Guvenc, Fatma Betul Celik, Abdurrahman Sarmis, Adem Atici, Oguz Konal, Mesut Akıl, Ahmet Selin Cumen, Nermin Mutlu Bilgic, Yusuf Yilmaz, Mustafa Caliskan

Analysis v3
DOI:10.1016/j.mvr.2022.104458
PubMed:36471530
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