To clarify the possible role of apoptosis in odontogenic epithelium, apoptosis-related factors and apoptotic cells were examined by immunohistochemistry and an in situ DNA nick end-labelling method. Expression of bcl-2 protein was detected in both normal and neoplastic odontogenic epithelium, whereas expression of p53 protein was detected only in neoplastic but not in normal odontogenic epithelium. The prevalence of cases positive for Lewis(y) antigen in ameloblastomas was significantly lower than in enamel organs. Correlation between these factors and apoptotic cells presented by an in situ DNA nick end-labelling method was not clear. The number of apoptotic cells in ameloblastomas was significantly greater than in normal odontogenic epithelium, and apoptotic reactions in the granular cell type ameloblastoma tended to be more frequently detected than in other types of ameloblastomas. These results suggested that apoptotic cell death might play an important role in oncogenesis and/or tissue differentiation in odontogenic epithelium.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1111/j.1600-0714.1997.tb00242.x | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Comparative evaluation of calretinin immunohistochemical expression in calcifying odontogenic cyst and ameloblastoma.
BMC Oral Health
January 2025
Oral Health Research Center, Health Research Institute, Babol University of Medical Sciences, Babol, Iran.
Background: Calretinin is a 29 kilodalton (KDa) calcium-binding protein that is expressed in normal and tumoral tissues. The expression of calretinin has been shown in the dental epithelium during odontogenesis and in different odontogenic cysts and tumors such as ameloblastoma. Since the epithelium of calcifying odontogenic cyst (COC) is similar to ameloblastoma and in both lesions, an arrangement of loose cells similar to stellate reticulum is seen, we aimed to investigate the comparative expression of calretinin in COC and ameloblastoma.
View Article and Find Full Text PDFClear cell variant of calcifying epithelial odontogenic tumour (Pindborg tumour) of the mandible.
BMJ Case Rep
January 2025
Department of Oral and Maxillofacial Surgery, Indira Gandhi Institute of Dental Sciences, Sri Balaji Vidyapeeth (Deemed to be University), Pondicherry, India.
A calcifying epithelial odontogenic tumour (CEOT) is a rare benign odontogenic tumour of epithelial origin accounting for approximately 1% of all odontogenic tumours. The intraosseous form occurs more commonly in the posterior mandible whereas the extraosseous form is common in the anterior maxilla. CEOT is often asymptomatic and presents with a painless swelling of the mandible.
View Article and Find Full Text PDFExtrafollicular Adenomatoid Odontogenic Tumors: A Series of Five Rare Cases with an Insight into Its Clinicopathological Aspects.
Contemp Clin Dent
December 2024
Department of Oral Pathology, Dr. R Ahmed Dental College, Kolkata, West Bengal, India.
Adenomatoid odontogenic tumors (AOT), first described by Steensland in 1905, are benign, slowly enlarging, nonaggressive, odontogenic epithelial neoplasms comprising 3%-7% of all odontogenic tumors. They tend to originate from the dental lamina remnants or the reduced enamel epithelium. Mutation at codon 12 of KRAS oncogene (Kirsten rat sarcoma viral oncogene homolog) plays a pivotal role in the pathogenesis.
View Article and Find Full Text PDFNavigating controversies in primary intraosseous carcinoma: A comprehensive literature review concerning the odontogenic origin and diagnostic challenges.
Semin Diagn Pathol
January 2025
Dept of Oral Pathology, King George's Medical University, Uttar Pradesh, India. Electronic address:
Primary intraosseous carcinoma (PIOC) is a rare and challenging jawbone malignancy often linked to odontogenic cysts. With minimal connection to oral mucosa and a low incidence rate, PIOC presents significant diagnostic difficulties, often mimicking other odontogenic lesions. Histogenesis and the correct classification of the lesion remains debated, with theories suggesting origins from odontogenic epithelium or cysts.
View Article and Find Full Text PDFDentigerous Cyst and Glandular Odontogenic Cyst: A Rare Combination of Coexisting Pathologies.
Cureus
December 2024
Oral and Maxillofacial Radiology, Henry M. Goldman School of Dental Medicine, Boston, USA.
A dentigerous cyst (DC) is the most common developmental cystic lesion of the jaws. Histologically, these cysts derive from the odontogenic epithelium that includes the reduced enamel epithelium, epithelial cell rests of Serres, and epithelial cell rests of Malassez. Radiographically, DCs are usually presented as well-defined radiolucencies associated with the crown of an unerupted tooth at the level of the cementoenamel junction (CEJ).
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!