The Study
Exposure to short-chain chlorinated paraffins inhibited PPARα-mediated fatty acid oxidation and stimulated aerobic glycolysis in vitro in human cells.
This study watched what happened to liver cells in a dish when they were exposed to a chemical. It can show that the chemical was linked to changes in the cells, but it can't prove the chemical caused the changes or that the same thing would happen in a person.
Analysis score
Maximum 44 for a cross-sectional study.
Where the score came from
This study looked at how a chemical called SCCP affects liver cells. At low levels found in people, it stops the cells from burning fat properly and makes them switch to a less efficient way of making energy, like what happens in cancer cells.
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 53 / 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.
- 1Yes, because it shows a pollutant at human-relevant levels can disrupt normal liver metabolism, which might lead to long-term health problems like fatty liver or metabolic disease.
- 2Liver cells exposed to 100 μg/L of SCCPs showed reduced fat burning and more sugar-based energy production.
- 3Fat-related genes were turned down, and fats built up in the cells.
Score breakdown, methodology, conflicts of interest, evidence analysis & raw study data
Publication
Journal
The Science of the total environment
Year
2021
Authors
Yufeng Gong, Ningbo Geng, Haijun Zhang, Yun Luo, J. Giesy, Shuai Sun, Ping Wu, Zhengkun Yu, Jiping Chen
Related Content
Claims (4)
Turning on a protein called PPARα helps cells move fat into tiny energy factories (mitochondria) so it can be burned for fuel.
Being exposed to a certain chemical (SCCPs) at a specific level seems to mess up how liver cells burn fat, based on lab tests with human liver cells in a dish.
A type of industrial chemical might turn on a certain human cell signal at high levels, but actually turns it off at lower levels that are more like what people are exposed to.
When liver cells are exposed to a common pollutant at a certain level, they start changing how they make energy — switching from their normal method to one usually seen in cancer cells, even though they're not cancerous.
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.