Quantitative dimensions of histopathological attributes and status of GSTM1-GSTT1 in oral submucous fibrosis.
Oral submucous fibrosis (OSF) is a precancerous condition of the oral cavity and oropharynx and a significant number of such cases transform into oral squamous cell carcinoma (OSCC). Presently, diagnosis of OSF is done mainly through qualitative histopathological techniques and in the level of diagnostic molecular biology no specific genetic marker is evident. Keeping these facts in mind this study evaluates histopathological changes in the epithelium and subepithelial connective tissue of OSF through quantitative digital image analysis in respect to specific candidate features and analyses null mutations in the GSTM1 and GSTT1 by PCR amplification. The analysis revealed that there are subtle quantitative differences in the histological images of OSF compared to NOM. The thickness of the epithelium and cell population in its different zones, radius of curvature of rete-ridges and connective tissue papillae were decreased but length of rete-ridges and connective tissue papillae, fibrocity and the number of cellular components (predominantly inflammatory cells) in the subepithelial connective tissue were increased in OSF. The PCR study revealed that there is no significant difference in the allelic variants in GSTM1 between OSF and normal, while GSTT1 null gene showed significantly higher frequencies in this precancerous condition. This study establishes a distinct quantitative difference between normal oral mucosa (NOM) and OSF in respect to their histological features and GST null gene frequencies.
Department of Oral and Maxillofacial Pathology, Guru Nanak Institute of Dental Science and Research, Panihati, Kolkata 700114, West Bengal, India.
Mousumi
M
Pal
Susri Ray
SR
Chaudhuri
Abhijeet
A
Jadav
Swapna
S
Banerjee
Ranjan Rashmi
RR
Paul
Pranab Kumar
PK
Dutta
Bhaskar
B
Ghosh
Jyotirmoy
J
Chatterjee
Keya
K
Chaudhuri
D000328:Adult; D000465:Algorithms; D014408:Biomarkers, Tumor / Q000235:genetics / Q000378:metabolism; D002294:Carcinoma, Squamous Cell / Q000235:genetics / Q000378:metabolism / Q000473:pathology; D018450:Disease Progression; D004847:Epithelial Cells / Q000378:metabolism / Q000473:pathology; D005355:Fibrosis; D015972:Gene Expression Regulation, Neoplastic; D020022:Genetic Predisposition to Disease; D005838:Genotype; D005982:Glutathione Transferase / Q000235:genetics* / Q000378:metabolism; D006801:Humans; D007091:Image Processing, Computer-Assisted; D008875:Middle Aged; D008954:Models, Biological; D009061:Mouth Mucosa / Q000378:metabolism / Q000473:pathology; D009062:Mouth Neoplasms / Q000235:genetics / Q000378:metabolism / Q000473:pathology; D011230:Precancerous Conditions / Q000235:genetics / Q000378:metabolism* / Q000473:pathology*
D014408:Biomarkers, Tumor; D005982:Glutathione Transferase; C413545:glutathione S-transferase T1