Cited by 658Pesticide Exposure and ToxicityEffects and risks of endocrine disrupting chemicalsCarcinogens and Genotoxicity Assessment

Glyphosate-based herbicides are toxic and endocrine disruptors in human cell lines

Gasnier, Céline, Dumont, Coralie, Benachour, Nora, Clair, Emilie, Chagnon, Marie-Christine, Séralini, Gilles-Eric·2009·Toxicology

Abstract

Glyphosate-based herbicides are the most widely used across the world; they are commercialized in different formulations. Their residues are frequent pollutants in the environment. In addition, these herbicides are spread on most eaten transgenic plants, modified to tolerate high levels of these compounds in their cells. Up to 400 ppm of their residues are accepted in some feed. We exposed human liver HepG2 cells, a well-known model to study xenobiotic toxicity, to four different formulations and to glyphosate, which is usually tested alone in chronic in vivo regulatory studies. We measured cytotoxicity with three assays (Alamar Blue, MTT, ToxiLight), plus genotoxicity (comet assay), anti-estrogenic (on ERalpha, ERbeta) and anti-androgenic effects (on AR) using gene reporter tests. We also checked androgen to estrogen conversion by aromatase activity and mRNA. All parameters were disrupted at sub-agricultural doses with all formulations within 24h. These effects were more dependent on the formulation than on the glyphosate concentration. First, we observed a human cell endocrine disruption from 0.5 ppm on the androgen receptor in MDA-MB453-kb2 cells for the most active formulation (R400), then from 2 ppm the transcriptional activities on both estrogen receptors were also inhibited on HepG2. Aromatase transcription and activity were disrupted from 10 ppm. Cytotoxic effects started at 10 ppm with Alamar Blue assay (the most sensitive), and DNA damages at 5 ppm. A real cell impact of glyphosate-based herbicides residues in food, feed or in the environment has thus to be considered, and their classifications as carcinogens/mutagens/reprotoxics is discussed.

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Crossref · 10.1016/j.tox.2009.06.006

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  • Roundup concentrations in the range of 10^3 times below the MRL induced endocrine disturbances in human cells and toxic effects thereafter, including in vivo.

    “it has been demonstrated that R concentrations in the range of 10 3 times below the MRL induced endocrine disturbances in human cells (Gasnier et al., 2009) and toxic effects thereafter (Benachour and Seralini, 2009), including in vivo (Romano et al., 2012).”
  • R has been shown to disrupt aromatase which synthesizes estrogens, but also to interfere with estrogen and androgen receptors in cells.

    “R has been shown to disrupt aromatase which synthesizes estrogens (Richard et al., 2005), but to also interfere with estrogen and androgen receptors in cells (Gasnier et al., 2009).”
  • At low contaminating levels, adjuvants may be better candidates than G to explain the toxicity or endocrine disruptive side effects of R on human cells and also in vivo for acute toxicity.

    “Even if G has shown to interact directly with the active site of aromatase at high levels [19], at low contaminating levels, adjuvants may be better candidates than G to explain the toxicity or endocrine disruptive side effects of R on human cells [8,20] and also in vivo for acute toxicity [21].”
  • R concentrations in the range of 103 times below the MRL can induce endocrine disturbances in human cells and toxic effects thereafter.

    “Indeed, it has been demonstrated that R concentrations in the range of 103 times below the MRL can induce endocrine disturbances in human cells [8] and toxic effects thereafter [9].”
  • This is consistent with the well-documented toxic effect of very low dilutions of R on apoptosis, mitochondrial function, and cell membrane degradation, inducing necrosis of hepatocytes, and in other cell lines.

    “This is consistent with the well-documented toxic effect of very low dilutions of R on apoptosis, mitochondrial function, and cell membrane degradation, inducing necrosis of hepatocytes, and in other cell lines [8,9,44,45].”

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Authors
Gasnier, C., Dumont, C., Benachour, N., Clair, E., Chagnon, M.-C., & Séralini, G.-E.
Affiliations
  • Université de Caen Normandie (FR)
  • Université de Bourgogne (FR)
Venue
Toxicology
Publisher
Elsevier BV
Published
2009-08
Volume
262
Issue
3
Pages
184-191
ISSN
0300-483X (ISSN-L)
OpenAlex
W2120475447
Cited by
658
References
95
Citations by year
2026: 22 · 2025: 35 · 2024: 41 · 2023: 37 · 2022: 38 · 2021: 65 · 2020: 61 · 2019: 60 · 2018: 59 · 2017: 46 · 2016: 44 · 2015: 23 · 2014: 31 · 2013: 25 · 2012: 27
FWCI
26.51
Type
journal article
Language
en
Open access
closed
Locations
  • Toxicology (publishedVersion)
  • PubMed (publishedVersion)
  • HAL (submittedVersion)
Funders
Fondation Denis Guichard
Topics
  • Life Sciences › Agricultural and Biological Sciences › Plant Science › Pesticide Exposure and Toxicity
  • Physical Sciences › Environmental Science › Health, Toxicology and Mutagenesis › Effects and risks of endocrine disrupting chemicals
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › Carcinogens and Genotoxicity Assessment
Keywords
glyphosate-based herbicides, endocrine disruption, cytotoxicity, genotoxicity, estrogen receptor alpha, estrogen receptor beta, androgen receptor, aromatase, herbicide formulation, genetically modified crops, HepG2 cells, DNA damage
MeSH terms
Glyphosate, Adolescent, Aromatase, DNA Damage, Dose-Response Relationship, Drug, Glycine, Herbicides, Humans, Male, Pesticide Residues, Receptors, Androgen, RNA, Messenger, Transcription, Genetic, Genes, Reporter, Toxicity Tests, Comet Assay, Cell Line, Tumor, Estrogen Receptor alpha, Estrogen Receptor beta, Endocrine Disruptors

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