[Exposure to aflatoxin B1 in experimental animals and its public health significance]
1Laboratorio de Micotoxinas, Departamento de Biotecnología y Bioquímica, Campus Guanajuato, Centro de Investigación y de Estudios Avanzados del IPN, Irapuato, Guanajuato, México. dguzman@ira.cinvestav.mx
Abstract:
The presence of AFB1 in human beings was detected in Mexico in 1996 both as a mutation of the gene p53 in hepatocellular carcinomas in Monterrey, Mexico, and as the adduct AFB1-lysine in serum from patients in Matamoros, Mexico in 2003. Aflatoxin B1 has been classified as a carcinogenic agent to humans by the International Agency for Research on Cancer. The compound is a natural contaminant produced by Aspergillus flavus and/or A. parasiticus when these fungi grow on different food products. At the molecular level, this review covers the carcinogenic, mutagenic and toxic properties of these mycotoxins and their risk to humans. It also gives insight into the causal relationship between aflatoxins and hepatocellular carcinoma. Information is provided about AFB1-formamidopyrimidine, which is a determinant of the carcinogenic and mutagenic capabilities. The results suggest that the Mexican population ingests food containing low amounts of AFB1. Analyses is presented of AFB1 toxicity, which is a consequence of the carcinogenic activity in liver cells.
Insights
Aflatoxin B1 (AFB1), a potent carcinogen found in food, poses risks to human health. This review details AFB1
Area of Science:
- Molecular toxicology and carcinology
- Food safety and mycotoxin analysis
Context:
- Aflatoxin B1 (AFB1) is a known human carcinogen produced by Aspergillus fungi.
- AFB1 presence in humans in Mexico was documented via p53 gene mutations and serum adducts.
- The International Agency for Research on Cancer classifies AFB1 as a carcinogen.
Purpose:
- To review the molecular mechanisms of AFB1's carcinogenic, mutagenic, and toxic properties.
- To elucidate the link between aflatoxins and hepatocellular carcinoma.
- To assess the risk of AFB1 exposure to the Mexican population.
Summary:
- This review details the molecular basis of aflatoxin B1 (AFB1) toxicity, including its carcinogenic and mutagenic effects.
- It highlights the role of AFB1-formamidopyrimidine in these harmful capabilities.
- Evidence suggests the Mexican population consumes food with low levels of AFB1, with toxicity primarily manifesting in liver cells.
Impact:
- Provides insights into the molecular determinants of AFB1 carcinogenicity.
- Informs public health strategies regarding mycotoxin contamination in food.
- Contributes to understanding the etiology of aflatoxin-induced liver cancer.
Related Concept Videos
Toxicity Testing in Animals
Types of Toxins
Air pollutants, primarily gases, pose significant threats to respiratory health, leading to conditions like hypoxia, lung cancer, and in extreme cases, death.
Environmental pollutants like...
Toxoplasmosis
Inhalation Anthrax

