Fujimoto N, Baurzhan A, Chaizhunusova N, Amantayeva G, Kairkhanova Y, Shabdarbaeva D, Zhunussov Y, Zhumadilov K, Stepanenko V, Gnyrya V, Azhimkhanov A, Kolbayenkov A, Hoshi M. Effects of Internal Exposure to
56MnO
2 Powder on Blood Parameters in Rats.
Eurasian J Med 2020;
52:52-56. [PMID:
32158315 DOI:
10.5152/eurasianjmed.2020.19228]
[Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Objective
The pathological effects of internal exposure to manganese dioxide-56 (56MnO2) radioisotope particles have been previously examined in rats. Here we further examine the effects of 56MnO2, focusing on changes in blood parameters.
Materials and Methods
Ten-week-old male Wistar rats were exposed to 3 doses of neutron-activated 56MnO2 powder, nonradioactive MnO2 powder, or external 60Co γ-rays (1 Gy, whole body). On days 3 and 61 postexposure, the animals were necropsied to measure organ weights and clinical blood parameters, including red blood cell and white blood cell counts; concentrations of calcium, phosphorus, potassium, and sodium; and levels of alanine aminotransferase (ALT), aspartate aminotransferase, amylase, creatinine, urea, total protein, albumin, triglycerides, high density lipoprotein, total cholesterol, and glucose.
Results
In the 56MnO2-exposed animals, accumulated doses were found to be highest in the gastrointestinal tract, followed by the skin and lungs, with whole-body doses ranging from 41 to 100 mGy. There were no 56MnO2 exposure-related changes in body weights or relative organ weights. The ALT level decreased on day 3 and then significantly increased on day 61 in the 56MnO2-exposed groups. There were no exposure-related changes in any other blood parameters.
Conclusion
Although the internal doses were less than 100 mGy, internal exposure of 56MnO2 powder showed significant biological impacts.
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