Immunohistochemical study of polycystin-1 in dentigerous cysts.
BACKGROUND
The alterations involved in step-wise transformation of a dental follicle to dentigerous cyst (DC) is not clearly known. Primary cilium and its protein have been hypothesized to be associated with DC. Mutation of a ciliary protein, polycystin-1 (PC1) is associated with autosomal dominant polycystic kidney disease. This study was performed to assess the immunohistochemical expression of PC1 between DC and postfunctional follicular tissue (PFFT).


METHODS
Thirty-one consecutive PFFT and 15 DC formed the study group. The PFFT and DC tissues were stained with antibody against PC1. Statistical Package for Social Service was used to analyze data. Descriptive statistics and Student's Chi-square test were appropriately used. P≤0.05 was taken as significant.


RESULTS
Fifteen DC (100%) and 7 (22.58%) PFFT were positive for PC1. The difference was statistically significant (P=0.000). PC1 expression was observed in the cytoplasm with varying intensity.


CONCLUSIONS
All PC1 positive epithelial cells' cytoplasm stained diffusely. Abnormal cytoplasmic expression of PC1 in all positive epithelial lining indicates that the PC1 probably is associated with cystic transformation.
Jaishlal Mariachelliah
JM
Nadar Singarayan
Department of Oral and Maxillofacial Pathology, Ragas Dental College and Hospital, Uthandi, Chennai, Tamil Nadu, India.
Thavarajah
T
Rooban
Elizabeth
E
Joshua
Umadevi Moduali
UM
Rao
Kannan
K
Ranganathan
D000328:Adult; D003803:Dentigerous Cyst / Q000378:metabolism*; D005260:Female; D006801:Humans; D007124:Immunoenzyme Techniques; D008297:Male; D010784:Photomicrography; D050396:TRPP Cation Channels / Q000378:metabolism*
D050396:TRPP Cation Channels