Related Experiment Video
Updated: May 22, 2026

Chromogenic In Situ Hybridization as a Tool for HPV-Related Head and Neck Cancer Diagnosis
Published on: June 14, 2019
Cyclin d1 expression and its correlation with histopathological differentiation in oral squamous cell carcinoma
Swati Saawarn1, Madhusudan Astekar, Nisheeth Saawarn
1Department of Oral Pathology and Microbiology, Peoples Dental Academy, Bhanpur, Bhopal, 462037 MP, India. drswatisaawarn@gmail.com
Background:
Cyclin D1 regulates the G1 to S transition of cell cycle. Its deregulation or overexpression may lead to disturbance in the normal cell cycle control and tumour formation. Overexpression of cyclin D1 has been reported in various tumors of diverse histogenesis. This case control retrospective study was carried out to study the immunohistochemical reactivity and expression of cyclin D1 and its association with site, clinical staging, and histopathological differentiation of oral squamous cell carcinoma (OSCC).
Methods:
Forty formalin-fixed paraffin-embedded tissue blocks of biopsy specimens of oral squamous cell carcinoma were immunohistochemically evaluated for expression of cyclin D1.
Results:
Cyclin D1 expression was seen in 45% cases of OSCC. It did not correlate with site and clinical staging. Highest expression was seen in well-differentiated, followed by moderately differentiated, and poorly differentiated squamous cell carcinomas, with a statistically significant correlation.
Conclusion:
Cyclin D1 expression significantly increases with increase in differentiation.
Related Concept Videos
Positive Regulator Molecules
M-Cdk Drives Transition Into Mitosis
Cyclin-dependent kinases, or Cdks, work in concert with cyclins to control cell cycle transitions. M-Cdk, a complex of Cdk1 bound to M cyclin, is a well-known example of this coordinated control that drives the transition from the G2 to the M phase.
M cyclin...
Inhibition of Cdk Activity
Abnormal Proliferation
Cadherins in Tissue Organization
Cell Sorting During Development
Cell sorting plays an...
Cellular Adaptation IV: Dysplasia and Metaplasia
