Related Experiment Videos
Is 2,3,7,8-TCDD (dioxin) a carcinogen for humans?
Environmental Health Perspectives
|October 1, 1985
Summary
2,3,7,8-Tetrachlorodibenzo-p-dioxin (TCDD) is a chemical waste linked to human health concerns, particularly cancer. While human evidence is limited, animal studies suggest TCDD
Area of Science:
- Environmental Toxicology
- Chemical Carcinogenesis
Background:
- 2,3,7,8-Tetrachlorodibenzo-p-dioxin (TCDD) is a contaminant of concern regarding chemical waste and human health.
- Potential association between TCDD exposure and human malignancy is under investigation.
Purpose of the Study:
- To review the evidence for TCDD's association with human cancer.
- To evaluate the toxicological mechanisms and epidemiological data concerning TCDD carcinogenicity.
Main Methods:
- Review of subcellular, cellular, and whole-animal experimental data.
- Analysis of conventional mutagenicity tests and animal tumor development studies.
- Examination of human epidemiological evidence from occupational, military, and environmental exposures.
Main Results:
- TCDD is a potent inducer of aryl hydrocarbon hydroxylase, with species-specific variations.
- Mutagenicity tests for TCDD have yielded conflicting results.
- Animal studies show tumor development after chronic TCDD ingestion; human studies suggest potential links to sarcoma and herbicides.
Conclusions:
- Despite limited direct human evidence for chronic disability or premature death, experimental data strongly suggest TCDD's carcinogenicity.
- A small number of human malignancies may be attributable to TCDD action.
- Elimination of TCDD as an unwanted contaminant could be achieved with minimal adverse consequences.