TY - JOUR
T1 - Intestinal bacteria as powerful trapping lifeforms for the elimination of radioactive cesium
AU - Saito, Kazuki
AU - Kuroda, Kengo
AU - Suzuki, Rie
AU - Kino, Yasushi
AU - Sekine, Tsutomu
AU - Shinoda, Hisashi
AU - Yamashiro, Hideaki
AU - Fukuda, Tomokazu
AU - Kobayashi, Jin
AU - Abe, Yasuyuki
AU - Nishimura, Junko
AU - Urushihara, Yusuke
AU - Yoneyama, Hiroshi
AU - Fukumoto, Manabu
AU - Isogai, Emiko
PY - 2019
Y1 - 2019
N2 - In March 2011, an accident at the Fukushima Daiichi Nuclear Power Plant led to major problems, including the release of radionuclides such as Cesium (Cs)-137 into the environment. Ever since this accident, Cs-137 in foods has become a serious problem. In this study, we determined the concentration of Cs-137 in the feces, urine, and ruminal contents of cattle and demonstrated the possibility of its elimination from the body by intestinal bacteria. The results revealed a high Cs-137 concentration in the feces; in fact, this concentration was higher than that in skeletal muscles and other samples from several animals. Furthermore, intestinal bacteria were able to trap Cs-137, showing an uptake ratio within the range of 38-81% in vitro. This uptake appeared to be mediated through the sodium-potassium (Na+-K+) ion pump in the bacterial cell membrane. This inference was drawn based on the fact that the uptake ratio of Cs-137 was decreased in media with high potassium concentration. In addition, it was demonstrated that intestinal bacteria hindered the trapping of Cs-137 by the animal. Cattle feces showed high concentration of Cs-137 and intestinal bacteria trapped Cs-137. This study is the first report showing that intestinal bacteria contribute to the elimination of Cs-137 from the body.
AB - In March 2011, an accident at the Fukushima Daiichi Nuclear Power Plant led to major problems, including the release of radionuclides such as Cesium (Cs)-137 into the environment. Ever since this accident, Cs-137 in foods has become a serious problem. In this study, we determined the concentration of Cs-137 in the feces, urine, and ruminal contents of cattle and demonstrated the possibility of its elimination from the body by intestinal bacteria. The results revealed a high Cs-137 concentration in the feces; in fact, this concentration was higher than that in skeletal muscles and other samples from several animals. Furthermore, intestinal bacteria were able to trap Cs-137, showing an uptake ratio within the range of 38-81% in vitro. This uptake appeared to be mediated through the sodium-potassium (Na+-K+) ion pump in the bacterial cell membrane. This inference was drawn based on the fact that the uptake ratio of Cs-137 was decreased in media with high potassium concentration. In addition, it was demonstrated that intestinal bacteria hindered the trapping of Cs-137 by the animal. Cattle feces showed high concentration of Cs-137 and intestinal bacteria trapped Cs-137. This study is the first report showing that intestinal bacteria contribute to the elimination of Cs-137 from the body.
KW - Cattle
KW - Cesium (Cs)-137
KW - Elimination
KW - Feces
KW - Fukushima Daiichi Nuclear Power Plant
KW - Gut microbiome
KW - Ruminants
UR - http://www.scopus.com/inward/record.url?scp=85065317108&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85065317108&partnerID=8YFLogxK
U2 - 10.3389/fvets.2019.00070
DO - 10.3389/fvets.2019.00070
M3 - Article
AN - SCOPUS:85065317108
VL - 6
JO - Frontiers in Veterinary Science
JF - Frontiers in Veterinary Science
SN - 2297-1769
IS - MAR
M1 - 70
ER -