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  11. Divergent Dna Methylation Patterns And Gene Expression In Myc And Cdkn2b In Canine Transmissible Venereal Tumors

Divergent DNA methylation patterns and gene expression in MYC and CDKN2B in canine transmissible venereal tumors

Soukkangna Keopaseuth1, Kidsadagon Pringproa2, Prapas Patchanee3

  • 1Graduate Program in Veterinary Medicine, Faculty of Veterinary Medicine, Chiang Mai University, Chiang Mai, 50100 Thailand.

Veterinary World
|August 26, 2024

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View abstract on PubMed

Summary
This summary is machine-generated.

DNA methylation in canine transmissible venereal tumor (CTVT) promoter regions impacts MYC gene and protein expression, particularly in genital CTVTs. However, CDKN2B methylation did not correlate with its expression, suggesting complex regulatory mechanisms in CTVT.

Area of Science:

  • Canine oncology
  • Epigenetics
  • Molecular biology

Background:

  • Canine transmissible venereal tumor (CTVT) is a unique contagious cancer in dogs.
  • While gene mutations are known, the role of DNA methylation in CTVT gene expression is unclear.
  • This study investigates DNA methylation of MYC and CDKN2B in CTVTs.

Purpose of the Study:

  • To determine the association between DNA methylation in the promoter regions of MYC and CDKN2B genes and their expression in CTVTs.
  • To compare methylation patterns and expression levels between genital CTVTs (GTVTs) and extragenital CTVTs (ETVTs).

Main Methods:

  • Analysis of frozen GTVT and ETVT tissue samples.
  • Bisulfite polymerase chain reaction (PCR) and sequencing for DNA methylation analysis.
Keywords:
CDKN2BDNA methylationMYCcanine transmissible venereal tumor

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  • Real-time PCR and Western blotting for gene and protein expression assessment.
  • Immunohistochemical staining for protein localization.

    • Main Results:

    • MYC promoter methylation was higher in GTVTs, correlating with reduced MYC gene and protein expression.
    • CDKN2B promoter hypermethylation was prevalent in both GTVT and ETVT samples.
    • CDKN2B methylation did not correlate with gene/protein expression, with discrepancies observed in both GTVTs and ETVTs.

    Conclusions:

    • MYC promoter methylation is clearly associated with its gene and protein expression in CTVTs.
    • CDKN2B expression is regulated by mechanisms independent of promoter DNA methylation.
    • Further research is needed to elucidate the complex regulatory pathways in CTVT.
    oncogene
    tumor suppressor gene