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Default Metabolic changes in mice cardiac tissue after low-dose irradiation revealed by 1H NMR spectroscopy.

Metabolic changes in mice cardiac tissue after low-dose irradiation revealed by 1H NMR spectroscopy.

Related Articles Metabolic changes in mice cardiac tissue after low-dose irradiation revealed by 1H NMR spectroscopy.

J Radiat Res. 2020 Jan 23;61(1):14-26

Authors: Gramatyka M, Boguszewicz ?, Ciszek M, Gabry? D, Kulik R, Soků? M

Abstract
Ionizing radiation may cause cardiotoxicity not only at high, but even at low (considered as harmless) doses, yet the molecular mechanisms of the heart's response to low doses are not clear. In this work, we used high-resolution nuclear magnetic resonance (NMR) spectroscopy to detect the early and late effects of radiation on the metabolism of murine hearts. The hearts of C57Bl/6NCrl female mice were irradiated in vivo with single 0.2*Gy or 2*Gy doses using 6 MV photons, then tissues were collected 48*h and 20*weeks after exposure. The most distinct changes in the profile of polar metabolites were detected 48*h after irradiation with 2*Gy, and included increased levels of pantothenate and glutamate as well as decreased levels of alanine, malonate, acetylcarnitine, glycine and adenosine. Significant effects of the 2*Gy dose were also observed 20*weeks after irradiation and included decreased levels of glutamine and acetylcarnitine when compared with age-matched controls. Moreover, several differences were observed between hearts irradiated with 2*Gy and analyzed either 48*h or 20*weeks after the exposure, which included changes in levels of acetylcarnitine, alanine, glycine, glutamate, glutamine, formate, myo-inositol and trimethylamine. No statistically significant effects induced by the 0.2*Gy dose were observed 20*weeks after irradiation. In general, radiation-affected compounds were associated with energy metabolism, fatty acid beta-oxidation, oxidative stress and damage to cell structures. At the same time, radiation-related effects were not detected at the level of tissue histology, which indicated a higher sensitivity of metabolomics-based tests for cardiac tissue response to radiation.


PMID: 31840756 [PubMed - indexed for MEDLINE]



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