Perinatal Bacterial Exposure and Liver Tumors
Author Information
Author(s): Taylor David A.
Primary Institution: National Institute of Environmental Health Sciences
Hypothesis
Perinatal exposure to Helicobacter hepaticus is more important than hepatitis itself in the development of liver tumors.
Conclusion
Perinatal exposure to Helicobacter hepaticus significantly increases the incidence of liver tumors in mice, independent of hepatitis severity.
Supporting Evidence
- 33% of the offspring developed liver tumors after maternal exposure to the bacteria.
- 18% of the offspring developed hepatocellular carcinoma.
- Tumor development was not closely linked to the severity of hepatitis.
Takeaway
Mice that were exposed to a certain bacteria before birth were more likely to get liver tumors later, even if they didn't get sick from hepatitis.
Methodology
Female mice were injected with Helicobacter hepaticus, bred with uninfected males, and their offspring were assessed for liver tumors.
Limitations
The type of additional perinatal event required to induce tumor development is unknown.
Participant Demographics
A/J mice were used in the study.
Statistical Information
Statistical Significance
p<0.05
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