Related Experiment Video
Updated: Apr 17, 2026
Isolation and Characterization of a Head and Neck Squamous Cell Carcinoma Subpopulation Having Stem Cell Characteristics
Published on: May 11, 2016
Increased expression of oncogene-induced senescence markers during cervical squamous cell cancer development
Yongsheng Zhang1, Liangsheng Guo2, Pengfei Xing3
1Department of Pathology, The Second Affiliated Hospital of Soochow University Suzhou, China.
Purpose:
To investigate the expression of p15(INK4b), p16(INK4a) and p21(Waf1/Cip1) in specimens from cases of normal cervical epithelium (NCE), cervical intraepithelial neoplasia (CIN) and squamous cell carcinoma (SCC), and to evaluate whether there is evidence implicating oncogene-induced senescence (OIS) in cervical squamous cell cancer development.
Methods:
The immunohistochemical expression of p15(INK4b), p16(INK4a) and p21(Waf1/Cip1) were investigated in formalin-fixed paraffin-embedded specimens from 19 NCE, 51 CIN and 21 SCC cases, respectively. Comparisons among different groups for each marker were performed with Chi-square test.
Results:
The expression of p15(INK4b), p16(INK4a) and p21(Waf1/Cip1) were significantly higher in both CIN and SCC compared to NCE. Furthermore, the expression of p15(INK4b) and p21(Waf1/Cip1) was significantly higher in CIN П compared to CIN І, and these expressions were statistically higher in CIN Ш compared to CIN П, respectively. The p16(INK4a) expression was significantly higher in CIN Ш compared to CIN І.
Conclusions:
The results suggested that the senescence programs mediated by p15(INK4b), p16(INK4a) and p21(Waf1/Cip1) were activated during the stage of CIN and SCC, and demonstrated that senescence may play important role in preventing from NCE to SCC.
Related Concept Videos
01:20The Retinoblastoma Gene
The first-ever tumor suppressor gene called Rb was identified in retinoblastoma - a rare eye tumor in children. In inherited forms of the disease, a child inherits one defective copy of the Rb gene, which predisposes them to retinoblastoma. However,...
01:05Cancer-Critical Genes II: Tumor Suppressor Genes
When the function of certain critical genes, especially those involved in cell cycle regulation and cell growth signaling cascades, gets disrupted, it upsets the cell cycle progression. Such cells with unchecked cell cycles start proliferating uncontrollably and eventually develop into tumors.
Such genes that act...
01:05Cancer-Critical Genes II: Tumor Suppressor Genes
01:33Cancer-Critical Genes I: Proto-oncogenes
When the function of certain critical genes, especially those involved in cell cycle regulation and cell growth signaling cascades, gets disrupted, it upsets the cell cycle progression. Such cells with unchecked cell cycles start proliferating uncontrollably and eventually develop into tumors.
Such genes that act...
01:33Cancer-Critical Genes I: Proto-oncogenes
02:15Replicative Cell Senescence