Animal Molecular Breeding 2024, Vol.14, No.4, 262-270 http://animalscipublisher.com/index.php/amb 268 resistance has been well-documented, suggesting that similar mechanisms could be at play in canine disease resistance. Furthermore, the epigenetic regulation of the ABCB1 gene in drug-sensitive and drug-resistant canine lymphoid tumor cell lines has been explored, revealing significant differences in DNA methylation and histone acetylation between these cell lines. Lastly, the review of epigenetic alterations in canine malignant lymphoma has underscored the potential of epigenetic markers as therapeutic targets and diagnostic/prognostic biomarkers. Epigenetic markers are crucial for understanding disease resistance in dogs because they provide insights into how gene expression is regulated in response to environmental factors. These markers, such as DNA methylation and histone modifications, can influence the development and progression of diseases by altering gene expression without changing the underlying DNA sequence. Identifying these markers can lead to the development of new diagnostic tools and therapeutic strategies. For instance, the regulation of the ABCB1 gene through DNA methylation and histone acetylation has been linked to multidrug resistance in canine lymphoid tumors, highlighting the potential for epigenetic therapies to overcome drug resistance. Additionally, understanding the epigenetic mechanisms involved in diseases like insulin resistance can pave the way for preventive measures and improved management of such conditions. Future research should focus on expanding the understanding of epigenetic mechanisms in various canine diseases and exploring their potential as therapeutic targets. Studies should aim to identify specific epigenetic markers associated with disease resistance and investigate their role in gene regulation. For example, further research into the epigenetic regulation of the ABCB1 gene could lead to the development of targeted therapies for overcoming multidrug resistance in canine cancers. Additionally, exploring the use of histone deacetylase and demethylase inhibitors as treatments for canine lymphoma could provide new avenues for therapy. The potential impact of these research directions is significant, as they could lead to more effective treatments, improved disease management, and better prognostic tools for canine diseases. By leveraging the knowledge of epigenetic markers, researchers can develop innovative strategies to enhance disease resistance and improve the overall health and well-being of dogs. Acknowledgments I would like to thank the anonymous reviewers for their insightful comments and suggestions that greatly improved the manuscript. Conflict of Interest Disclosure Author affirms that this research was conducted without any commercial or financial relationships that could be construed as a potential conflict of interest. References Bachir E., Poiraud C., Claux H., Moghrabi S., Paget S., Duchêne B., Jonckheere N., Neve B., Leteurtre E., Seuningen I., and Vincent A., 2022, Abstract 2965: Epigenetic mechanisms involved in acquired resistance to combined chemotherapies in digestive cancer cells, Cancer Research, 82(12_Supplement): 2965. https://doi.org/10.1158/1538-7445.am2022-2965 Begolli R., Sideris N., and Giakountis A., 2019, LncRNAs as chromatin regulators in cancer: from molecular function to clinical potential, Cancers, 11(10): 1524. https://doi.org/10.3390/cancers11101524 PMID: 31658672 PMCID: PMC6826483 Ceric O., Tyson G., Goodman L., Mitchell P., Zhang Y., Prarat M., Cui J., Peak L., Scaria J., Antony L., Thomas M., Nemser S., Anderson R., Thachil A., Franklin-Guild R., Slavić D., Bommineni Y., Mohan S., Sanchez S., Wilkes R., Sahin O., Hendrix G., Lubbers B., Reed D., Jenkins T., Roy A., Paulsen D., Mani R., Olsen K., Pace L., Pulido M., Jacob M., Webb B., Dasgupta S., Patil A., Ramachandran A., Tewari D., Thirumalapura N., Kelly D., Rankin S., Lawhon S., Wu J., Burbick C., and Reimschuessel R., 2019, Enhancing the one health initiative by using whole genome sequencing to monitor antimicrobial resistance of animal pathogens: Vet-LIRN collaborative project with veterinary diagnostic laboratories in United States and Canada, BMC Veterinary Research, 15(1): 130. https://doi.org/10.1186/s12917-019-1864-2 PMID: 31060608 PMCID: PMC6501310 D'Aquila P., Rango F., Paparazzo E., Passarino G., and Bellizzi D., 2023, Epigenetic-based regulation of transcriptome in escherichia coli adaptive antibiotic resistance, Microbiology Spectrum, 11(3): e0458322. https://doi.org/10.1128/spectrum.04583-22 PMID: 37184386 PMCID: PMC10269836
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