TY - JOUR
T1 - Increased metallothionein content in rat liver and kidney following X-irradiation
AU - Shiraishi, Noriyuki
AU - Yamamoto, Hiromichi
AU - Takeda, Yoshihiro
AU - Kondoh, Shintaroh
AU - Hayashi, Hidehiro
AU - Hashimoto, Keiji
AU - Aono, Kaname
N1 - Copyright:
Copyright 2014 Elsevier B.V., All rights reserved.
PY - 1986/9/15
Y1 - 1986/9/15
N2 - Hepatic and renal metallothionein (MT) contents were measured in rats following whole-body X-irradiation. When compared with control rats, the hepatic MT-Zn content increased fivefold and MT protein content increased 15-fold by 18 hr following irradiation (2000 rad). Administration of actinomycin-D inhibited both the mobilization of zinc to the liver and the irradiation-induced increase in metallothionein synthesis. Serum zinc levels did not change after irradiation alone, although serum zinc following actinomycin-D treatment and irradiation was significantly elevated. An increase in renal MT-Zn was also observed. In comparison with control, the increase in renal MT-Zn content after irradiation (2000 rad) did not occur earlier than 12 hr but was increased twofold by 24 hr. In comparison with kidney, the hepatic MT-Zn content following irradiation was already elevated threefold by 6 hr. Dose-response studies (250-3000 rad, 72 hr) indicated that similar dose-response relationships for the appearance of MT in the liver and kidney were observed. Total zinc was decreased in the spleen and thymus, and increased in the liver or kidney 18 hr after irradiation (2000 rad). These data indicate that X-ray treatment produces an in vivo induction of hepatic and renal MT synthesis.
AB - Hepatic and renal metallothionein (MT) contents were measured in rats following whole-body X-irradiation. When compared with control rats, the hepatic MT-Zn content increased fivefold and MT protein content increased 15-fold by 18 hr following irradiation (2000 rad). Administration of actinomycin-D inhibited both the mobilization of zinc to the liver and the irradiation-induced increase in metallothionein synthesis. Serum zinc levels did not change after irradiation alone, although serum zinc following actinomycin-D treatment and irradiation was significantly elevated. An increase in renal MT-Zn was also observed. In comparison with control, the increase in renal MT-Zn content after irradiation (2000 rad) did not occur earlier than 12 hr but was increased twofold by 24 hr. In comparison with kidney, the hepatic MT-Zn content following irradiation was already elevated threefold by 6 hr. Dose-response studies (250-3000 rad, 72 hr) indicated that similar dose-response relationships for the appearance of MT in the liver and kidney were observed. Total zinc was decreased in the spleen and thymus, and increased in the liver or kidney 18 hr after irradiation (2000 rad). These data indicate that X-ray treatment produces an in vivo induction of hepatic and renal MT synthesis.
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U2 - 10.1016/0041-008X(86)90106-7
DO - 10.1016/0041-008X(86)90106-7
M3 - Article
C2 - 2429403
AN - SCOPUS:0022457503
SN - 0041-008X
VL - 85
SP - 128
EP - 134
JO - Toxicology and Applied Pharmacology
JF - Toxicology and Applied Pharmacology
IS - 2
ER -