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Nanoparticle-EMF synergism: a study on the combined effects on developmental and behavioral endpoints in Drosophila melanogaster

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Bhandari M, Anand AS, Verma K, Regmi K, Amitabh, Prasad DN, Kohli E · 2025

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Co-exposure to EMF and nanoparticles produced dose- and time-dependent biological responses in Drosophila that differed from exposure to either agent alone, suggesting synergistic or antagonistic interactions between these environmental exposures.

Plain English Summary

Summary written for general audiences

This study examined the combined effects of 2.4 GHz electromagnetic field (EMF) exposure and zinc oxide nanoparticle (NP) ingestion on fruit flies (Drosophila melanogaster) across multiple generations, measuring impacts on longevity, motor function, oxidative stress, memory, learning, and physical abnormalities. The results showed complex interactions between EMF and NP exposures, with 20-minute EMF exposure improving survival in flies exposed to high-dose nanoparticles, while also inducing behavioral impairments, elevated oxidative stress, and developmental abnormalities that partially reversed in subsequent generations.

Why This Matters

Drosophila melanogaster is a well-established model organism for studying developmental and behavioral effects due to its genetic tractability and conserved biological pathways. The use of multiple biological endpoints (longevity, oxidative stress, behavior, morphology) across generations provides a comprehensive assessment of potential health impacts, though findings in invertebrate models require careful consideration before extrapolation to mammalian systems.

Exposure Information

Specific exposure levels were not quantified in this study.

Cite This Study
Bhandari M, Anand AS, Verma K, Regmi K, Amitabh, Prasad DN, Kohli E (2025). Nanoparticle-EMF synergism: a study on the combined effects on developmental and behavioral endpoints in Drosophila melanogaster.
Show BibTeX
@article{bhandari_m_anand_as_verma_k_regmi_k_amitabh_prasad_dn_kohli_e_ce2318,
  author = {Bhandari M and Anand AS and Verma K and Regmi K and Amitabh and Prasad DN and Kohli E},
  title = {Nanoparticle-EMF synergism: a study on the combined effects on developmental and behavioral endpoints in Drosophila melanogaster},
  year = {2025},
  doi = {10.1016/s1473-3099(25)00093-3},
  
}
DOI: 10.1016/s1473-3099(25)00093-3PubMed: 41036120

Quick Questions About This Study

The trial was terminated due to low patient recruitment. Only 923 participants enrolled in the molnupiravir comparison and 137 in the nirmatrelvir-ritonavir comparison, far below what was needed for definitive results.
No significant difference was found. 17% of patients died in both the molnupiravir group and the usual care group within 28 days, suggesting no survival benefit from the antiviral treatment.
The molnupiravir comparison included hospitals in three countries: 75 hospitals in the UK, two in Nepal, and two in Indonesia. The nirmatrelvir-ritonavir comparison was conducted at 32 UK hospitals only.
Yes, more than three-quarters of participants were vaccinated and had anti-spike antibodies at enrollment. Additionally, over two-thirds were already receiving other SARS-CoV-2 antiviral treatments as part of usual care.
Possibly. The researchers acknowledged that low enrollment meant clinically meaningful benefits couldn't be ruled out, particularly for nirmatrelvir-ritonavir. The study lacked sufficient power to detect smaller but potentially important treatment effects.