The Cytotoxicity of Aflatoxin B1 in Human Lymphocytes

Overview

Journal Sultan Qaboos Univ Med J

Specialty General Medicine

Date 2014 Feb 12

PMID 24516756

Citations 3

Authors

Suleiman Al-Hammadi

Farida Marzouqi

Aysha Al-Mansouri

Allen Shahin

Mariam Al-Shamsi

Eric Mensah-Brown

Abdul-Kader Souid

Affiliations

Soon will be listed here.

Abstract

Objectives: Aflatoxin B1 (AFB1) is a naturally occurring carcinogenic and immunosuppressive compound. This study was designed to measure its toxic effects on human peripheral blood mononuclear cells (PBMC).

Methods: The study recruited 7 healthy volunteers. PBMC were isolated and cellular respiration was monitored using a phosphorescence oxygen analyser. The intracellular caspase activity was measured by the caspase-3 substrate N-acetyl-asp-glu-val-asp-7-amino-4-methylcoumarin. Phosphatidylserine exposure and membrane permeability to propidium iodide (PI) were measured by flow cytometry.

Results: Cellular oxygen consumption was inhibited by 2.5 μM and 25 μM of AFB1. Intracellular caspase activity was noted after two hours of incubation with 100 μM of AFB1. The number of Annexin V-positive cells increased as a function of AFB1 concentration and incubation time. At 50 μM, a significant number of cells became necrotic after 24 hours (Annexin V-positive and PI-positive).

Conclusion: The results show AFB1 is toxic to human lymphocytes and that its cytotoxicity is mediated by apoptosis and necrosis.

Citing Articles

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Chronic and Acute Toxicities of Aflatoxins: Mechanisms of Action.

Benkerroum N Int J Environ Res Public Health. 2020; 17(2).

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