Abstract
African ostrich chicks (Struthio camelus) were divided into six groups, and each received different levels of boric acid (source of boron) in the drinking water (0, 40, 80, 160, 320, and 640 mg/L respectively) to examine the histological, apoptotic, biochemical, and transcriptomic parameters. Morphological analysis in different groups was assessed by hematoxylin and eosin (H&E) staining, periodic acid Schiff (PAS) staining, and terminal deoxynucleotide transferase dUTP Nick-End Labeling (TUNEL) assay. The biochemical profile was evaluated spectrophotometrically. Detailed RNA-Seq of the data was performed using the transcriptomic method. H&E staining showed well-developed liver structure up to the 160 mg/L boric acid (BA) supplement groups, while BA doses (320 mg/L and 640 mg/L) caused changes in hepatocytes and portal triads. PAS staining showed that glycogen levels were optimal in the 80 mg/L BA dose group, but a reduction in glycogen levels was observed after this group, particularly in the 640 mg/L BA supplement group. Cellular apoptosis showed a biphasic pattern, and the BA dose above 160 mg/L enhanced cell death. In addition, serum analysis showed that doses of 80–160 mg BA were beneficial for ostrich liver. Then, the transcriptome analysis of the 80 mg dose also showed mainly positive effects on the liver. These results demonstrated that chronic BA exposure (320–640 mg) can cause significant histological, apoptotic, and biochemical changes in African ostrich liver, while the adequate dose of supplementation (particularly 80 mg BA) promotes liver growth.
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All data generated or analyzed during this study are included in this article. The supplementary material is available from the corresponding author upon reasonable request.
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Acknowledgements
We thank the College of Basic Veterinary Medicine, Huazhong Agricultural University, Wuhan, for their support in sample preparation and analysis.
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This work was funded and supported by the National Natural Science Foundation of China (Nos. 31272517 and 31672504).
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The authors confirm their contribution to the paper as follows: study conception and design: HK and KP; data collection: HK, XK, and YK; analysis and interpretation of results: WJ, JZ, ZL, and HK; and draft manuscript preparation: HK, SP, and KP.
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Khaliq, H., Ke, X., Keli, Y. et al. Morphological and Transcriptomic Analysis of the Supplemental Boron in the Liver of Ostrich Chicks. Biol Trace Elem Res 201, 4022–4042 (2023). https://doi.org/10.1007/s12011-022-03489-9
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DOI: https://doi.org/10.1007/s12011-022-03489-9