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Role of matrix metalloproteinases in radicular cysts and periapical granulomas

G D'addazio1, L Artese, M Piccirilli

  • 1Department of Medical, Oral and Biotechnological Sciences University of Chieti‑Pescara, Italy - gianmariad@gmail.com.

Minerva Stomatologica
|December 16, 2014
PubMed
Abstract

Insights

Matrix metalloproteinases (MMPs) play a role in inflammatory processes of radicular cysts and periapical granulomas. MMP-9 expression may contribute to radicular cyst enlargement, while MMP-8 is linked to active inflammation in periapical granulomas.

Area of Science:

  • Oral pathology
  • Biochemistry
  • Immunohistochemistry

Background:

  • Radicular cysts and periapical granulomas are inflammatory jaw lesions.
  • Matrix metalloproteinases (MMPs) are enzymes involved in tissue remodeling and inflammation.

Purpose of the Study:

  • To evaluate the expression and distribution of MMP-2, -9, -8, -13, and -3 in radicular cysts and periapical granulomas.
  • To correlate MMP expression patterns with lesion characteristics.

Main Methods:

  • Immunohistochemical analysis of 20 radicular cysts and 20 periapical granulomas.
  • Semi-quantitative assessment of MMP expression intensity (low, intermediate, high).

Main Results:

  • MMP-9 showed distinct expression patterns: high in inflammatory cells of periapical granulomas and keratinocytes/fibroblasts of radicular cysts.
  • MMP-8 was primarily expressed in inflammatory cells of periapical granulomas.
  • MMP-2 and -3 had low expression in both lesion types, while MMP-13 showed variable distribution.

Conclusions:

  • MMPs are implicated in the inflammatory pathogenesis of radicular cysts and periapical granulomas.
  • Higher MMP-9 expression in radicular cysts may relate to their larger size.
  • Elevated MMP-8 in periapical granulomas suggests a role in active inflammation.

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