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A novel imprinted locus on bovine chromosome 18 homologous with human chromosome 16q24.1

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Abstract

Genomic imprinting is an epigenetic regulation mechanism in mammals resulting in the parentally dependent monoallelic expression of genes. Imprinting disorders in humans are associated with several congenital syndromes and cancers and remain the focus of many medical studies. Cattle is a better model organism for investigating human embryo development than mice. Imprinted genes usually cluster on chromosomes and are regulated by different methylation regions (DMRs) located in imprinting control regions that control gene expression in cis. There is an imprinted locus on human chromosome 16q24.1 associated with congenital lethal developmental lung disease in newborns. However, genomic imprinting on bovine chromosome 18, which is homologous with human chromosome 16 has not been systematically studied. The aim of this study was to analyze the allelic expressions of eight genes (CDH13, ATP2C2, TLDC1, COTL1, CRISPLD2, ZDHHC7, KIAA0513, and GSE1) on bovine chromosome 18 and to search the DMRs associated gene allelic expression. Three transcript variants of the ZDHHC7 gene (X1, X2, and X5) showed maternal imprinting in bovine placentas. In addition, the monoallelic expression of X2 and X5 was tissue-specific. Five transcripts of the KIAA0513 gene showed tissue- and isoform-specific monoallelic expression. The CDH13, ATP2C2, and TLDC1 genes exhibited tissue-specific imprinting, however, COTL1, CRISLPLD2, and GSE1 escaped imprinting. Four DMRs, established after fertilization, were found in this region. Two DMRs were located between the ZDHHC7 and KIAA0513 genes, and two were in exon 1 of the CDH13 and ATP2C2 genes, respectively. The results from this study support future studies on the molecular mechanism to regulate the imprinting of candidate genes on bovine chromosome 18.

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Data availability

The data used to support the findings of this study are included within the article, and the data are available from the corresponding author upon request.

Abbreviations

BSP:

Bisulfite polymerase chain reaction

DMR:

Different methylation region

gDMR:

Germline different methylation region

ICR:

Imprinting control regions

PCR:

Polymerase chain reaction

RT-PCR:

Reverse transcription polymerase chain reaction

sDMR:

Somatic different methylation region

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Funding

This study was supported by the Hebei Province Natural Science Foundation (C2023204145 and C2022201058), the Hebei Province Agricultural Industry Technology System Innovation Team (HBCT2024240206, HBCT2024240202), the Earmarked Fund for China Agriculture Research System No (CARS36), the National Foreign Expert Project (G2022003015L), and S&T Program of Hebei (22326321D).

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Haonan Huo, Cui Zhang, Shujing Li, Shujie Li, Wenli Yu, designed the research. Haonan Huo, Cui Zhang, Yinjiao Zhang, Siwei Wang performed research, Haonan Huo, Cui Zhang, Weina Chen, Kun Wang,Siwei Wang contributed analytical/computational tools, Haonan Huo, Shijie Li, Shujing Li, wrote the paper. All authors read, discussed, and approved the fnal version of the manuscript.

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Correspondence to Shujing Li or Shijie Li.

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Conflict of interest

The authors declare no conflict of interest.

Ethical approval

Ethical approval for the use of bovine somatic tissues including placenta samples was granted by the Animal Protection Committee of Agricultural Research at Hebei Agricultural University. All animal experiments were approved by the Animal Care Committee of Agricultural Research at Hebei Agricultural University (No. 14021).

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Communicated by Joan Cerdá.

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Huo, H., Zhang, C., Wang, K. et al. A novel imprinted locus on bovine chromosome 18 homologous with human chromosome 16q24.1. Mol Genet Genomics 299, 40 (2024). https://doi.org/10.1007/s00438-024-02123-8

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  • DOI: https://doi.org/10.1007/s00438-024-02123-8

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