研究のタイプ: 医学/生物学の研究 (experimental study)

[単一雌系統ショウジョウバエの超低周波磁界(50Hz、0.5mT)に対するさまざまな反応:適応度要素および運動活動度] med./bio.

Different responses of Drosophila subobscura isofemale lines to extremely low frequency magnetic field (50 Hz, 0.5 mT): fitness components and locomotor activity.

掲載誌: Int J Radiat Biol 2017; 93 (5): 544-552

この研究は、ショウジョウバエの単一雌(IF)系統5種類の適応度成分および運動活動度に対する超低周波磁界(ELF)の影響を調べた。5つのIF系統は、ミトコンドリアDNA変異性に基づいて遺伝的構造が決定されたものである。各系統の卵—第1齢幼虫および1日齢ハエにELF(50Hz、0.5mT)の48時間ばく露を与え、ばく露後のオープンフィルド試験で、雌雄別に、適応度成分および運動活動度を測定した。その結果、卵—第1齢幼虫へのばく露の場合、発生時間が短縮したが、生存率および性比への影響は見られなかった;1日齢の雌雄のハエへのばく露の場合、いくつかのIF系統では、雄よりも雌において、運動活動量が有意に低下し、その影響が長時間継続した、と報告している。

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研究目的(著者による)

The effects of exposure to a 50 Hz magnetic field on development and motor activity Drosophila subobscura at various developmental stages should be investigated.

詳細情報

Five strains of the fruit fly Drosophila subobscura (named B16/1, B24/4, B39/1, B57/2 and B69/5) were prepared with each strain derived from a single pair of flies (isofemale strains) and defined via mitochondrial DNA variability. The flies were exposed either in egg-first instar larval stage (group 1, number not mentioned) or as 1-day-old adult animals (group 2, n=30). For each exposure group, a control group without any treatment and a sham exposure group (n=30 each for adult animals, no number stated for larvae) were examined in the same developmental stages.

影響評価項目

ばく露

ばく露 パラメータ
ばく露1: 50 Hz

ばく露1

主たる特性
周波数 50 Hz
タイプ
  • magnetic field
ばく露装置
ばく露の発生源/構造
  • 詳細不明
Sham exposure A sham exposure was conducted.
パラメータ
測定量 種別 Method Mass 備考
磁束密度 0.5 mT - 測定値 - -

Reference articles

ばく露を受けた生物:

方法 影響評価項目/測定パラメータ/方法

研究対象とした生物試料:
調査の時期:
  • ばく露後

研究の主なアウトカム(著者による)

No significant differences were found between the sham exposure and untreated control groups, so they were pooled and used as one control group, respectively.
Exposure of egg-first instar larvae (group 1) to the magnetic field resulted in a significantly shortened developmental time in all strains compared to the control group but did not affect viability or sex ratio.
Exposure of 1-day-old male and female adults (group 2) to the magnetic field significantly decreased the motor activity compared to the control group in the strains B16/1 and B24/4 and this effect lasted longer in females than males.
The authors conclude that exposure to a 50 Hz magnetic field might have different effects on development and motor activity of Drosophila subobscura at various developmental stages depending on their genetic background.

研究の種別:

研究助成

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