The Study
Comparison of gene transcription between subcutaneous and visceral adipose tissue in Chinese adults.
This study is like taking a snapshot of two different types of fat tissue from the same people at one moment in time. Scientists looked at which genes are 'turned on' in each type of fat. They found that some genes are more active in belly fat than in fat under the skin, especially in people who are obese. But because they only looked at one moment, they can't prove that these gene differences actually cause health problems - they can only show that the differences exist.
Analysis score
Maximum 44 for a cross-sectional study.
Where the score came from
Scientists compared genes turned on in fat from the belly (visceral) versus fat under the skin (subcutaneous) in 30 Chinese adults. They found that belly fat in obese people has more inflammation-related genes active, which may explain why storing fat in the belly causes more health problems.
Where does this study sit?
Reviews of RCTs (Meta-analyses)
Max 100Randomized Trials
Max 90Reviews of Cohort Studies
Max 85Cohort Studies
Max 72Reviews of Case-Control Studies
Max 63Case-Control Studies
Max 58Cross-Sectional & Case Series
Max 50Expert Opinion
Max 544 / 100
Quality score
Snapshots of a population at a single point in time, or descriptions of small groups. Can identify correlations and prevalence, but cannot determine cause and effect.
Key takeaways
Summary
Based on the study abstract and findings.
- 1This matters because higher inflammation in belly fat may explain why people with more visceral fat develop diabetes and heart disease more easily.
- 2In obese adults: belly fat has higher TNF-alpha and TLR4 (inflammation signals).
- 3In all people: belly fat has lower leptin (hunger hormone).
- 4Belly fat 11beta-HSD1 levels go up with higher body weight.
- 5Belly fat GR levels match TLR4 levels.
Score breakdown, methodology, conflicts of interest, evidence analysis & raw study data
Publication
Journal
Endocrine journal
Year
2009
Authors
J. M. Zha, W. Di, Ting Zhu, Yu-chun Xie, Jing Yu, Juan Liu, Peng Chen, G. Ding
Related Content
Claims (10)
In people with obesity from China, the genes that make a specific inflammatory marker called TNF-alpha are more active in the fat around the organs inside the belly than in the fat under the skin.
In fat tissue from Chinese adults, higher levels of a specific receptor that responds to stress hormones are linked to higher levels of a receptor that triggers inflammation. They're connected in a way that when one goes up, the other tends to go up too.
In Chinese adults, higher levels of 11beta-HSD1 mRNA in visceral fat are associated with higher body mass index.
Exposure of visceral fat cells from Chinese adults to free fatty acids results in increased production of TNF-alpha mRNA, a molecule involved in inflammatory signaling.
In Chinese adults, the gene that makes the hunger-controlling hormone leptin is less active in fat stored around the organs inside the belly compared to fat stored under the skin, whether someone is lean or obese.
In adults with obesity from China, a gene called TLR4 that helps control inflammation is more active in fat stored deep inside the belly around organs than in fat found just under the skin.
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.