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Variability in the Epithelial Expression of Ki67 and Polarization Characteristics of Collagen in Odontogenic Cysts and Tumours
Bhadravathi, Shakthi Dorai; Natarajan, Srikant; Boaz, Karen; Lewis, Amitha Juanita; Pallam, Nandita Kottieth; Manaktala, Nidhi.
  • Bhadravathi, Shakthi Dorai; Manipal Academy of Higher Education. Manipal College of Dental Sciences. Department of Oral Pathology and Microbiology. Manipal. IN
  • Natarajan, Srikant; Manipal Academy of Higher Education. Manipal College of Dental Sciences. Department of Oral Pathology and Microbiology. Manipal. IN
  • Boaz, Karen; Manipal Academy of Higher Education. Manipal College of Dental Sciences. Department of Oral Pathology and Microbiology. Manipal. IN
  • Lewis, Amitha Juanita; Manipal Academy of Higher Education. Manipal College of Dental Sciences. Department of Oral Pathology and Microbiology. Manipal. IN
  • Pallam, Nandita Kottieth; Manipal Academy of Higher Education. Manipal College of Dental Sciences. Department of Oral Pathology and Microbiology. Manipal. IN
  • Manaktala, Nidhi; Manipal Academy of Higher Education. Manipal College of Dental Sciences. Department of Oral Pathology and Microbiology. Manipal. IN
Pesqui. bras. odontopediatria clín. integr ; 23: e220019, 2023. tab, graf
Article Dans Anglais | LILACS, BBO | ID: biblio-1529112
ABSTRACT
ABSTRACT

Objective:

To assess the proliferation of epithelium (using the Ki67 index) and the polarization pattern of collagen in selected odontogenic cysts and tumours. In addition, an exploratory analysis of the effect of inflammation on the proliferation rate was done. Material and

Methods:

Following immunohistochemical staining, the labelling/proliferation index of Ki67 was calculated. The thickness and corresponding polarization colour of 100 juxta-epithelial picrosirius red-stained collagen fibers were assessed using linear micrometry with an eyepiece reticule under × 1000 magnification. Inflammation was graded subjectively as mild, moderate, and severe.

Results:

Overall Ki-67 expression was higher in the radicular cyst, Odontogenic Keratocyst, Ameloblastoma, while suprabasal Ki-67 positivity was maximum in Odontogenic Keratocyst. The stromal collagen fibers in Ameloblastoma showed predominantly green birefringence, whereas Odontogenic Keratocyst had orange birefringence. There was no significant association of inflammation with Ki-67 expression or birefringence patterns.

Conclusion:

The highest Ki67 expression in the radicular cyst, followed by Odontogenic Keratocyst and Ameloblastoma. Differences in the collagen maturation pattern were noted innately in five lesions studied and were further influenced by inflammatory changes. Epithelial proliferation and concomitant expression of thickness and maturity of the stromal collagen are innate features of the lesion further influenced by inflammation in various odontogenic cysts and tumours and may, in turn, guide the clinical behavior.
Sujets)


Texte intégral: Disponible Indice: LILAS (Amériques) Sujet Principal: Améloblastome / Kystes odontogènes / Kyste radiculaire / Collagène / Antigène KI-67 Type d'étude: Étude observationnelle / Facteurs de risque langue: Anglais Texte intégral: Pesqui. bras. odontopediatria clín. integr Thème du journal: Dentisterie Année: 2023 Type: Article Pays d'affiliation: Inde Institution/Pays d'affiliation: Manipal Academy of Higher Education/IN

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Texte intégral: Disponible Indice: LILAS (Amériques) Sujet Principal: Améloblastome / Kystes odontogènes / Kyste radiculaire / Collagène / Antigène KI-67 Type d'étude: Étude observationnelle / Facteurs de risque langue: Anglais Texte intégral: Pesqui. bras. odontopediatria clín. integr Thème du journal: Dentisterie Année: 2023 Type: Article Pays d'affiliation: Inde Institution/Pays d'affiliation: Manipal Academy of Higher Education/IN