ELF-009Original text reviewed

Life-span exposure to sinusoidal-50 Hz magnetic field and acute low-dose γ radiation induce carcinogenic effects in Sprague-Dawley rats

Soffritti et al. · 2016 · International Journal of Radiation Biology

The reported finding

At 1000 µT+gamma, female mammary adenocarcinoma 18/112 vs 8/105 gamma-only (p≤.05); male haemolymphoreticular neoplasia 28/110 vs 18/118 (p≤.05). Male cardiac schwannomas 2/105 and 3/110 vs 1/500 untreated were significant; comparison against gamma-only 0/118 was nonsignificant.

Reading it carefully

Coexposure; large shared untreated control and smaller gamma-only comparator; not an RF-alone or below-limit cancer demonstration; combined atypia/carcinoma endpoints distinct from carcinoma alone.

Inside the study

Exposure conditions

50 Hz sinusoidal magnetic field, 20 or 1000 µT, 19 h/day, gestational day 12 to natural death; additional whole-body 0.1 Gy gamma dose at 6 weeks. ELF plus ionising coexposure, not RF.

Design & controls

1658 rats including 1001 shared untreated controls; gamma-only 118 M/105 F; 20 µT+gamma 105 M/107 F; 1000 µT+gamma 110 M/112 F. Cox survival-adjusted models; Mantel-Haenszel for some zero-case endpoints. Survival unchanged. Same pathology team/supervisor review; masking not documented in reviewed methods.

Related research & shared cohorts

RI ELF megaexperiment; 1001 untreated controls shared with ELF-alone and formaldehyde arms. Distinct animals/exposure from RF-002; Soffritti 2019 mini-review repeats data.

The protection question raised

Can combined exposures modify cancer outcomes? Comparisons with gamma-only animals are essential: selected mammary and haemolymphoid findings differed, whereas the heart-schwannoma comparison did not. This is a power-frequency coexposure experiment.

Source verification

Original 14-page early online journal PDF reviewed: methods, Tables 2-6, results, funding; final citation checked with Scite/PubMed.

Where to find the result

PDF pp 3-4 treatment/pathology/statistics; p 7 Tables 4-6; p 9 heart comparison; p 12 funding. Final journal pp 202-214.

Editorial notices

No editorial notice located in Scite/PubMed/targeted title searches 2026-10-20; not certification of no possible future notice.

Funding

RI; ARPA Emilia-Romagna; UK Children With Cancer; Cassa di Risparmio Bologna; INAIL; Fondazione del Monte Bologna/Ravenna; Municipality of Bologna. No conflicts declared; funders no direct role.

Conflicts of interest

Authors declare no conflicts or competing interests, as documented in the retrieved source disclosure.

Original publication

Soffritti M, Tibaldi E, Padovani M, Hoel DG, Giuliani L, Bua L, Lauriola M, Falcioni L, Manservigi M, Manservisi F, Panzacchi S, Belpoggi F. Life-span exposure to sinusoidal-50 Hz magnetic field and acute low-dose γ radiation induce carcinogenic effects in Sprague-Dawley rats. International Journal of Radiation Biology. 2016;92(4):202-214. doi:10.3109/09553002.2016.1144942.

Plain-text record