{"id":41054,"date":"2026-03-03T00:01:14","date_gmt":"2026-03-03T05:01:14","guid":{"rendered":"https:\/\/beyondpesticides.org\/dailynewsblog\/?p=41054"},"modified":"2026-03-03T11:31:46","modified_gmt":"2026-03-03T16:31:46","slug":"studies-again-find-genetic-and-epigenetic-effects-from-pesticide-exposure-threatening-future-generations","status":"publish","type":"post","link":"https:\/\/beyondpesticides.org\/dailynewsblog\/2026\/03\/studies-again-find-genetic-and-epigenetic-effects-from-pesticide-exposure-threatening-future-generations\/","title":{"rendered":"Studies Find Genetic and Epigenetic Effects from Pesticide Exposure, Threatening Future Generations"},"content":{"rendered":"

(Beyond Pesticides<\/em>, March 3, 2026) Research published in Critical Reviews in Toxicology<\/em><\/a> (CRT) and Proceedings of the National Academy of Sciences<\/em><\/a> (PNAS) documents the genetic and epigenetic (changes to gene function without altering the DNA sequence) effects to pesticide-exposed groups through early-life exposure and from transgenerational<\/a> inheritance (passed down through generations). These studies highlight the complex nature of mechanisms of toxicity, as well as the various pesticide exposure routes that begin even prior to conception. The analyses evaluate general and specific pesticide exposure as reported in observational and laboratory research. Through a systematic review and meta-analysis of studies on \u201cDNA damage, cytogenetic damage, DNA methylation, or gene expression outcomes associated with prenatal and early childhood pesticide exposure,\u201d the CRT authors link genotoxic mechanisms and epigenetic alterations to adverse health outcomes while the PNAS study shows pesticide-induced epigenetic alterations in mammals across 20 generations that “suggest the maternal and paternal lineages can both induce and inherit epigenetic alterations that influence disease (e.g., kidney, testis, ovary, prostate) incidence, reproductive health<\/a> (e.g., parturition<\/a>, infertility), and overall fitness generationally.\u201d<\/p>\n

As the CRT study states: \u201cOne of the main ways pesticides can cause harm is through genotoxicity\u2014their ability to damage genetic material. This damage can appear as breaks in DNA strands, structural changes in chromosomes, or epigenetic alterations that modify gene activity without changing the DNA structure itself… [which] may have profound implications for growth, neurodevelopment, and long-term disease risk.\u201d Genotoxicity can occur through multiple pathways, including oxidative stress<\/a> and changes in DNA methylation<\/a> (biochemical controls in the body for\u00a0gene expression, detoxification, and cell repair) patterns. Epigenetic changes, however, are changes in gene function (turning genes on or off) without underlying DNA sequences being altered. These changes can be inherited by subsequent generations (referred to as epigenetic transgenerational inheritance<\/a>) and can lead to developmental effects and increased disease susceptibility.<\/p>\n

Study Methodology and Results<\/strong><\/p>\n

In the Critical Reviews in Toxicology<\/em><\/a> study, a review of observational research, including cross-sectional, case-control, and cohort studies, was performed. Twenty-eight studies were analyzed, which focus on \u201cthe genotoxic consequences of prenatal and early childhood pesticide exposure.\u201d As the authors note, \u201cEligible outcome measurements included biomarkers of DNA damage (e.g. percentage of DNA in comet tail, olive tail moment, tail length), frequency of cytogenetic abnormalities (e.g. micronuclei counts, chromosomal aberrations), DNA methylation levels at specific genomic loci or global methylation status, and expression levels of genes involved in DNA damage response, detoxification, or other relevant pathways.\u201d<\/p>\n

The study populations incorporate embryos, fetuses, infants, and young children up to five\u2009years of age, as well as pregnant mothers if the placenta was investigated, where pesticide exposure was self-reported. As a result, the researchers find \u201csubstantial DNA damage in pesticide-exposed groups, with stronger effects in maternal and cord blood,\u201d as well as cytogenetic<\/a> (chromosome) damage in agricultural areas, \u201csignificant downregulation of DNA damage\/repair genes and distinct biological responses across inflammatory, oxidative stress, and cell signaling pathways,\u201d and changes in DNA methylation. \u201cThe evidence supports substantial genotoxic and epigenetic alterations following early-life pesticide exposure, highlighting mechanistic pathways that may underlie adverse health outcomes and reinforcing the need for precautionary policies during critical developmental windows,\u201d the authors write.<\/p>\n

Noteworthy study results include:<\/p>\n