Repeated exposure to nanosecond high power pulsed microwaves increases cancer incidence in rat.
High-power microwaves are used to inhibit electronics of threatening military or civilian vehicles. This work aims to assess health hazards of high-power microwaves and helps to define hazard threshold levels of modulated radiofrequency exposures such as those emitted by the first generations of mob...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Public Library of Science (PLoS)
2020-01-01
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| Series: | PLoS ONE |
| Online Access: | https://doi.org/10.1371/journal.pone.0226858 |
| _version_ | 1819019490062499840 |
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| author | René de Seze Carole Poutriquet Christelle Gamez Emmanuelle Maillot-Maréchal Franck Robidel Anthony Lecomte Caroline Fonta |
| author_facet | René de Seze Carole Poutriquet Christelle Gamez Emmanuelle Maillot-Maréchal Franck Robidel Anthony Lecomte Caroline Fonta |
| author_sort | René de Seze |
| collection | DOAJ |
| description | High-power microwaves are used to inhibit electronics of threatening military or civilian vehicles. This work aims to assess health hazards of high-power microwaves and helps to define hazard threshold levels of modulated radiofrequency exposures such as those emitted by the first generations of mobile phones. Rats were exposed to the highest possible field levels, under single acute or repetitive exposures for eight weeks. Intense microwave electric fields at 1 MV m-1 of nanoseconds duration were applied from two sources at different carrier frequencies of 10 and 3.7 GHz. The repetition rate was 100 pps, and the duration of train pulses lasted from 10 s to twice 8 min. The effects on the central nervous system were evaluated, by labelling brain inflammation marker GFAP and by performing different behavioural tests: rotarod, T-maze, beam-walking, open-field, and avoidance test. Long-time survival was measured in animals repeatedly exposed, and anatomopathological analysis was performed on animals sacrificed at two years of life or earlier in case of precocious death. Control groups were sham exposed. Few effects were observed on behaviour. With acute exposure, an avoidance reflex was shown at very high thermal level (22 W kg-1); GFAP was increased some days after exposure. Most importantly, with repeated exposures, survival time was 4-months shorter in the exposed group, with eleven animals exhibiting a large sub-cutaneous tumour, compared to two in the sham group. A residual X-ray exposure was also present in the beam (0.8 Gy), which is probably not a bias for the observed result. High power microwaves below thermal level in average, can increase cancer prevalence and decrease survival time in rats, without clear effects on behaviour. The parameters of this effect need to be further explored, and a more precise dosimetry to be performed. |
| first_indexed | 2024-12-21T03:36:08Z |
| format | Article |
| id | doaj.art-7a5c1d7b4f434bedbf0a1150e7173e3d |
| institution | Directory Open Access Journal |
| issn | 1932-6203 |
| language | English |
| last_indexed | 2024-12-21T03:36:08Z |
| publishDate | 2020-01-01 |
| publisher | Public Library of Science (PLoS) |
| record_format | Article |
| series | PLoS ONE |
| spelling | doaj.art-7a5c1d7b4f434bedbf0a1150e7173e3d2022-12-21T19:17:20ZengPublic Library of Science (PLoS)PLoS ONE1932-62032020-01-01154e022685810.1371/journal.pone.0226858Repeated exposure to nanosecond high power pulsed microwaves increases cancer incidence in rat.René de SezeCarole PoutriquetChristelle GamezEmmanuelle Maillot-MaréchalFranck RobidelAnthony LecomteCaroline FontaHigh-power microwaves are used to inhibit electronics of threatening military or civilian vehicles. This work aims to assess health hazards of high-power microwaves and helps to define hazard threshold levels of modulated radiofrequency exposures such as those emitted by the first generations of mobile phones. Rats were exposed to the highest possible field levels, under single acute or repetitive exposures for eight weeks. Intense microwave electric fields at 1 MV m-1 of nanoseconds duration were applied from two sources at different carrier frequencies of 10 and 3.7 GHz. The repetition rate was 100 pps, and the duration of train pulses lasted from 10 s to twice 8 min. The effects on the central nervous system were evaluated, by labelling brain inflammation marker GFAP and by performing different behavioural tests: rotarod, T-maze, beam-walking, open-field, and avoidance test. Long-time survival was measured in animals repeatedly exposed, and anatomopathological analysis was performed on animals sacrificed at two years of life or earlier in case of precocious death. Control groups were sham exposed. Few effects were observed on behaviour. With acute exposure, an avoidance reflex was shown at very high thermal level (22 W kg-1); GFAP was increased some days after exposure. Most importantly, with repeated exposures, survival time was 4-months shorter in the exposed group, with eleven animals exhibiting a large sub-cutaneous tumour, compared to two in the sham group. A residual X-ray exposure was also present in the beam (0.8 Gy), which is probably not a bias for the observed result. High power microwaves below thermal level in average, can increase cancer prevalence and decrease survival time in rats, without clear effects on behaviour. The parameters of this effect need to be further explored, and a more precise dosimetry to be performed.https://doi.org/10.1371/journal.pone.0226858 |
| spellingShingle | René de Seze Carole Poutriquet Christelle Gamez Emmanuelle Maillot-Maréchal Franck Robidel Anthony Lecomte Caroline Fonta Repeated exposure to nanosecond high power pulsed microwaves increases cancer incidence in rat. PLoS ONE |
| title | Repeated exposure to nanosecond high power pulsed microwaves increases cancer incidence in rat. |
| title_full | Repeated exposure to nanosecond high power pulsed microwaves increases cancer incidence in rat. |
| title_fullStr | Repeated exposure to nanosecond high power pulsed microwaves increases cancer incidence in rat. |
| title_full_unstemmed | Repeated exposure to nanosecond high power pulsed microwaves increases cancer incidence in rat. |
| title_short | Repeated exposure to nanosecond high power pulsed microwaves increases cancer incidence in rat. |
| title_sort | repeated exposure to nanosecond high power pulsed microwaves increases cancer incidence in rat |
| url | https://doi.org/10.1371/journal.pone.0226858 |
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