ArticleEnvironmental science and pollution research international2026
Exploring oxidative stress and epigenetic biomarkers in bees: insights into health effects of air pollution and diet - a pilot study.
Article in Environmental science and pollution research international, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Bees are vulnerable to environmental pollution, including toxic emissions from fire events, which can impact oxidative balance. This study was conducted as a pilot investigation with a relatively limited sample size and aimed to assess the levels of specific biomarkers [8-oxo-7,8-dihydroguanine (8-oxoGua), 8-oxo-7,8-dihydroguanosine (8-oxoGuo), 8-oxo-2'-deoxyguanosine (8-oxodGuo), 3-nitrotyrosine (3-NO₂Tyr), and 5-methylcytidine (5-MeCyt)] by HPLC‒MS/MS analysis in bees sampled before (May) and after (June) a landfill fire. The bees were divided into three groups: untreated (control), supplemented with Quassia amara, or fed probiotics. HPLC‒MS/MS analysis revealed no significant differences in the total bee population before and after fire. However, 8-oxoGua significantly increased in the control bees postfire (p < 0.05). Conversely, bees treated with Q. amara or probiotics tended to exhibit lower levels of oxidative and epigenetic biomarkers. However, only the Q. amara group showed a significant post-fire decrease in 8-oxoGua (p < 0.010). These observations should be considered preliminary and hypothesis-generating given the pilot nature and limited sample size of the study. Further investigations are required to elucidate their interaction mechanisms and long-term effects on pollinator health. Overall, this study highlights the potential of honeybees as early sentinels of oxidative stress, providing valuable insights for environmental monitoring and ecosystem health assessment.
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