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Immunohistochemical Evaluation of p300, H2AacK5 and H3AcK27 in Odontogenic Cysts and Tumors

  • 0Laboratory of Pathological Anatomy and Immunohistochemistry, School of Dentistry, Federal University of Pará, Belém, Brazil.
Oral Diseases +

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October 22, 2024

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October 22, 2024

View abstract on PubMed

Summary

This summary is machine-generated.

Histone acetylation, including H2AacK5 and H3AcK27, modulated by p300, is linked to odontogenic lesion behavior. Higher expression in non-aggressive lesions suggests diagnostic potential.

Area Of Science

  • Oral pathology and oncology
  • Molecular biology and epigenetics
  • Biochemistry and cellular mechanisms

Background

  • Histone acetylation regulates gene expression and cellular processes.
  • The p300 enzyme plays a key role in histone acetylation.
  • The role of specific histone acetylations (H2AacK5, H3AcK27) in odontogenic lesions remains unexplored.

Purpose Of The Study

  • To investigate the immunoexpression of p300, H2AacK5, and H3AcK27 in various odontogenic lesions.
  • To correlate the expression levels of these markers with the biological behavior and aggressiveness of odontogenic lesions.

Main Methods

  • Immunohistochemical analysis of p300, H2AacK5, and H3AcK27 in ameloblastoma, odontogenic keratocyst, adenomatoid odontogenic tumor, odontogenic fibroma, calcifying odontogenic cyst, odontogenic myxoma, and ameloblastic fibroma samples.
  • Quantitative assessment of positive cell percentages for each marker.
  • Statistical analysis to determine correlations and differences between lesion types.

Main Results

  • p300 expression varied significantly across lesion types, being highest in adenomatoid odontogenic tumor.
  • H2AacK5 and H3AcK27 showed distinct expression patterns, with higher levels in ameloblastic fibroma and adenomatoid odontogenic tumor, respectively.
  • Significantly higher expression of p300, H2AacK5, and H3AcK27 was observed in non-aggressive odontogenic lesions compared to aggressive ones.
  • Positive correlations were found between p300 and H2AacK5/H3AcK27 in specific lesion types (AMB, MIX, OF, AOT, COC).

Conclusions

  • Histone acetylation, mediated by p300, appears to be involved in the pathogenesis and behavior of odontogenic lesions.
  • The differential expression patterns suggest potential roles for H2AacK5 and H3AcK27 in distinguishing lesion aggressiveness.
  • These epigenetic markers may serve as valuable tools for improving the diagnosis and treatment strategies for odontogenic lesions.

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