Potassium bromate and DNA damage in human liver cells
What it found
Potassium bromate damaged DNA and chromosomes in human liver cells grown in the lab.
An antioxidant reduced some of that DNA damage.
What they found
Animal and lab studies
DNA and chromosome damage
In human liver cells grown in the lab, potassium bromate caused DNA strand breaks at all tested levels from 1.56 to 12.5 mM. It also caused chromosome damage at levels from 0.12 to 1 mM.
Antioxidant protection
Treating the lab cells with an antioxidant called hydroxytyrosol before exposure sharply lowered the amount of DNA damage seen in the tests.
Oxidative stress markers
In these lab cells, potassium bromate raised levels of reactive oxygen molecules at 12.5 mM. It also lowered natural cell antioxidants at 1.56 to 12.5 mM and increased a marker of DNA oxidation at 6.25 to 12.5 mM.
Lysosome changes
The chemical significantly changed lysosomal membrane stability in the lab cells at levels between 6.25 and 12.5 mM. The authors suggest this may be an early step before DNA damage occurs.
What the authors conclude
- They conclude that potassium bromate causes oxidative stress and gene damage in human liver cells grown in the lab.
- They suggest this harm may start with damage to lysosomes, which happens before the DNA itself is affected.
How it was done
Potassium bromate is a common food additive and a byproduct of water treatment, but little is known about how it harms human genes. The authors wanted to find out how it damages DNA and what drives that harm.
The researchers exposed human liver cancer cells, called HepG2, to potassium bromate at several concentrations. They measured DNA breaks, chromosome damage, and signs of oxidative stress. They also tested whether an antioxidant could reduce the DNA damage.
What it can’t tell you
- We summarised it from the abstract only.
- These are lab tests on human liver cancer cells, not studies in living people. Results in isolated cells cannot show what happens when someone eats or drinks potassium bromate.
- The study used specific concentrations in a dish, so it cannot tell us what levels might cause effects in a whole body.
Who paid
- Authors work at
- Dalian Medical University, China
The paper
- Title
- Possible involvement of oxidative stress in potassium bromate-induced genotoxicity in human HepG2 cells
- Type
- Study
- Evidence
- Animals and lab studies
- Summarised from
- Abstract only
- Cite
- Zhang Y, Jiang L, Jiang L, et al (2011). Possible involvement of oxidative stress in potassium bromate-induced genotoxicity in human HepG2 cells. Chemico-biological interactions. doi:10.1016/j.cbi.2010.12.011PubMed 21182833DOI
Summary written 30 Sep 2026. Check it against the paper before it changes what you eat. How we summarise papers · Report an error