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Analyses of hemorrhagic diathesis in high-iron diet-fed rats

Iron overload has been well recognized to cause oxidant-mediated cellular/tissue injury; however, little is known about the effects of iron overload on the blood coagulation system. We encountered an unexpected bleeding tendency in rats fed a high-iron diet in a set of studies using iron-modified di...

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Autores principales: Inai, Yohei, Izawa, Takeshi, Mori, Mutsuki, Atarashi, Machi, Tsuchiya, Seiichirou, Kuwamura, Mitsuru, Yamate, Jyoji
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Japanese Society of Toxicologic Pathology 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7890162/
https://www.ncbi.nlm.nih.gov/pubmed/33627943
http://dx.doi.org/10.1293/tox.2020-0004
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author Inai, Yohei
Izawa, Takeshi
Mori, Mutsuki
Atarashi, Machi
Tsuchiya, Seiichirou
Kuwamura, Mitsuru
Yamate, Jyoji
author_facet Inai, Yohei
Izawa, Takeshi
Mori, Mutsuki
Atarashi, Machi
Tsuchiya, Seiichirou
Kuwamura, Mitsuru
Yamate, Jyoji
author_sort Inai, Yohei
collection PubMed
description Iron overload has been well recognized to cause oxidant-mediated cellular/tissue injury; however, little is known about the effects of iron overload on the blood coagulation system. We encountered an unexpected bleeding tendency in rats fed a high-iron diet in a set of studies using iron-modified diets. In this study, we investigated the mechanism of hemorrhagic diathesis induced by dietary iron overload in rats. Six-week-old F344/DuCrlCrlj male rats were fed a standard (containing 0.02% iron) or a high-iron diet (containing 1% iron) for 6 weeks and were then sampled for hematological, blood biochemical, coagulation, and pathological examinations. Serum and liver iron levels increased in rats fed the high-iron diet (Fe group) and serum transferrin was almost saturated with iron. However, serum transaminase levels did not increase. Moreover, plasma prothrombin time and activated partial thromboplastin time were significantly prolonged, regardless of the presence of hemorrhage. The activity of clotting factors II and VII (vitamin K-dependent coagulation factors) decreased significantly, whereas that of factor VIII was unaltered. Blood platelet levels were not influenced by dietary iron overload, suggesting that the bleeding tendency in iron-overloaded rats is caused by secondary hemostasis impairment. In addition, hemorrhage was observed in multiple organs in rats fed diets containing more than 0.8% iron. Our results suggest that iron overload can increase the susceptibility of coagulation abnormalities caused by latent vitamin K insufficiency.
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spelling pubmed-78901622021-02-23 Analyses of hemorrhagic diathesis in high-iron diet-fed rats Inai, Yohei Izawa, Takeshi Mori, Mutsuki Atarashi, Machi Tsuchiya, Seiichirou Kuwamura, Mitsuru Yamate, Jyoji J Toxicol Pathol Original Article Iron overload has been well recognized to cause oxidant-mediated cellular/tissue injury; however, little is known about the effects of iron overload on the blood coagulation system. We encountered an unexpected bleeding tendency in rats fed a high-iron diet in a set of studies using iron-modified diets. In this study, we investigated the mechanism of hemorrhagic diathesis induced by dietary iron overload in rats. Six-week-old F344/DuCrlCrlj male rats were fed a standard (containing 0.02% iron) or a high-iron diet (containing 1% iron) for 6 weeks and were then sampled for hematological, blood biochemical, coagulation, and pathological examinations. Serum and liver iron levels increased in rats fed the high-iron diet (Fe group) and serum transferrin was almost saturated with iron. However, serum transaminase levels did not increase. Moreover, plasma prothrombin time and activated partial thromboplastin time were significantly prolonged, regardless of the presence of hemorrhage. The activity of clotting factors II and VII (vitamin K-dependent coagulation factors) decreased significantly, whereas that of factor VIII was unaltered. Blood platelet levels were not influenced by dietary iron overload, suggesting that the bleeding tendency in iron-overloaded rats is caused by secondary hemostasis impairment. In addition, hemorrhage was observed in multiple organs in rats fed diets containing more than 0.8% iron. Our results suggest that iron overload can increase the susceptibility of coagulation abnormalities caused by latent vitamin K insufficiency. Japanese Society of Toxicologic Pathology 2020-10-24 2021-01 /pmc/articles/PMC7890162/ /pubmed/33627943 http://dx.doi.org/10.1293/tox.2020-0004 Text en ©2021 The Japanese Society of Toxicologic Pathology This is an open-access article distributed under the terms of the Creative Commons Attribution Non-Commercial No Derivatives (by-nc-nd) License. (CC-BY-NC-ND 4.0: https://creativecommons.org/licenses/by-nc-nd/4.0/).
spellingShingle Original Article
Inai, Yohei
Izawa, Takeshi
Mori, Mutsuki
Atarashi, Machi
Tsuchiya, Seiichirou
Kuwamura, Mitsuru
Yamate, Jyoji
Analyses of hemorrhagic diathesis in high-iron diet-fed rats
title Analyses of hemorrhagic diathesis in high-iron diet-fed rats
title_full Analyses of hemorrhagic diathesis in high-iron diet-fed rats
title_fullStr Analyses of hemorrhagic diathesis in high-iron diet-fed rats
title_full_unstemmed Analyses of hemorrhagic diathesis in high-iron diet-fed rats
title_short Analyses of hemorrhagic diathesis in high-iron diet-fed rats
title_sort analyses of hemorrhagic diathesis in high-iron diet-fed rats
topic Original Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7890162/
https://www.ncbi.nlm.nih.gov/pubmed/33627943
http://dx.doi.org/10.1293/tox.2020-0004
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