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Expression of cardiac copper chaperone encoding genes and their correlation with cardiac function parameters in goats

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Abstract

Copper deficiency (CuD) is a common cause of oxidative cardiac tissue damage in ruminants. The expression of copper chaperone (Cu-Ch) encoding genes enables an in-depth understanding of copper-associated disorders, but no previous studies have been undertaken to highlight Cu-Ch disturbances in heart tissue in ruminants due to CuD. The current study aimed to investigate the Cu-Ch mRNA expression in the heart of goats after experimental CuD and highlight their relationship with the cardiac measurements. Eleven male goats were enrolled in this study and divided into the control group (n = 4) and CuD group (n = 7), which received copper-reducing dietary regimes for 7 months. Heart function was evaluated by electrocardiography and echocardiography, and at the end of the experiment, all animals were sacrificed and the cardiac tissues were collected for histopathology and quantitative mRNA expression by real-time PCR. In the treatment group, cardiac measurements revealed increased preload and the existence of cardiac dilatation, and significant cardiac tissue damage by histopathology. Also, the relative mRNA expression of Cu-Ch encoding genes; ATP7A, CTr1, LOX, COX17, as well as ceruloplasmin (CP), troponin I3 (TNNI3), glutathione peroxidase (GPX1), and matrix metalloprotease inhibitor (MMPI1) genes were significantly down-regulated in CuD group. There was a significant correlation between investigated genes and some cardiac function measurements; meanwhile, a significant inverse correlation was observed between histopathological score and ATP7B, CTr1, LOX, and COX17. In conclusion, this study revealed that CuD induces cardiac dilatation and alters the mRNA expression of Cu-Ch genes, in addition to TNNI3, GPX1, and MMPI1 that are considered key factors in clinically undetectable CuD-induced cardiac damage in goats which necessitate further studies for feasibility as biomarkers.

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Conceptualization and experimental design, A.S.M, G.W, A.O, A.E, and R.T; methodology, A.S.M, H.A.A, and K.M; data curation, A.S.M; software, A.S.M; formal analysis, A.S.M; investigation, A.S.M; resources, G.W, R.T; writing—original draft, A.S.M, H.A.A; writing—review and editing, A.S.M, H.S, H.A.A, A.E.M, I.W, A.O.A, A.U, L.H, T.Y, K.T., and R.T; supervision, R.T, G.W, A.O.A, A.E.M; project administration, A.S.M; funding acquisition, G.W, R.T. All authors have read and agreed to the published version of the manuscript.

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Correspondence to Ahmed S. Mandour.

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This study was approved by the Experimental Animal Committee of Tokyo University of Agriculture and Technology (approval no. 29–5) and was conducted following the “Guide for the Care and Use of Laboratory Animals” at Tokyo University of Agriculture and Technology.

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Mandour, A.S., Mahmoud, A.E., Ali, A.O. et al. Expression of cardiac copper chaperone encoding genes and their correlation with cardiac function parameters in goats. Vet Res Commun 45, 305–317 (2021). https://doi.org/10.1007/s11259-021-09811-5

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  • DOI: https://doi.org/10.1007/s11259-021-09811-5

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