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

[スマートフォン通話への30分間ばく露はイン・ビトロでの好中球活性化を引き起こす] med./bio.

Thirty-minutes' exposure to smartphone call triggers neutrophil activation in vitro.

掲載誌: Clin Chem Lab Med 2016; 54 (9): 1497-1501

この研究は、多形核白血球に対する無線周波RF電磁界の影響を実験的に調べた。外見上健康なボランティア(n=16)から各人採血管2本分の全血を連続して採血した。プラスティックラックに各人1本の採血管を市販のスマートフォン(搬送周波数900MHz)から1cmの距離に並べ、30分間連続の通信をマニュアルで実施した。各人の別の1本の採血管を並べたラックはRF電磁界発生源への接近を避けた場所に同時間置いた。全ての採血管のサンプルをアドヴィア2120総合血液学検査装置で分析した。その結果、アドヴィア2120の多くの活性化パラメータにおいて観察された有意な変動を考慮すれば、スマートフォンRF電磁界ばく露はイン・ビトロでの好中球活性化を誘発することが示された、と報告している。

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研究目的(著者による)

The effects of exposure of human blood samples to a 900 MHz electromagnetic field on leukocytes should be investigated.

詳細情報

Two whole blood samples were collected from 16 ostensibly healthy volunteers. The first sample from each donor was exposed to the electromagnetic field (exposure group) and the other sample was not exposed (control group).

影響評価項目

ばく露

ばく露 パラメータ
ばく露1: 900 MHz
ばく露時間: continuous for 30 minutes
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ばく露1

主たる特性
周波数 900 MHz
タイプ
  • electromagnetic field
ばく露時間 continuous for 30 minutes
Additional information carrier frequency
ばく露装置
ばく露の発生源/構造
  • セルラ-電話
  • smartphone
Distance between exposed object and exposure source 1 cm
チャンバの詳細 test tubes
ばく露装置の詳細 a tube with blood of each volunteer was placed in a plastic rack, 1 cm from the chassis of a smartphone placed in a horizontal position in the middle of the rack; the main characteristics of the smartphone used for this experiment were height: 12.4 cm, width: 5.9 cm, thickness: 0.8 cm, widescreen: 10 cm (diagonal); immediately after placing the samples in the plastic rack close to the smartphone, a call was placed and a communication lasting exactly 30 min was manually activated with 3G and Wi-Fi connections being disabled; throughout the call, the rack containing the samples and the smartphone was gently inverted one-time upside-down every 5 min to prevent blood cell sedimentation; the smartphone was then removed from the plastic rack and the samples were left in upright position for additional 60 min, without further mixing or exposure
Additional information control blood samples of each volunteer were placed in another plastic rack for 90 min; as for exposed samples, the rack was gently inverted one-time upside-down every 5 min during the first 30 min; the samples were also left in the upright position for the remaining 60 min, without further mixing afterwards; close contact (<1 m) of the control samples to mobile phones or other sources of radiofrequency waves was avoided throughout the study period
パラメータ

No parameters are specified for this exposure.

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)

Leukocyte counts did not show significant differences between the groups. However, a significantly increased neutrophil activity was measured in exposed samples compared to the control group.
The authors conclude that exposure of human blood samples to a 900 MHz electromagnetic field might trigger neutrophil activation.

研究の種別:

研究助成

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