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Immunohistochemical study of p53 and proliferating cell nuclear antigen expression in odontogenic keratocyst and periapical cyst.

Sajeevan TP, Saraswathi TR, Ranganathan K, Joshua E, Rao UD - J Pharm Bioallied Sci (2014)

Bottom Line: Chi-square test showed PCNA staining intensity was more significant than p53 in OKC. (2) The staining intensity of PA using p53, PCNA revealed that PCNA stating intensity was more significant than p53.OKC shows significant proliferative activity than PA using PCNA and p53.PCNA staining was more intense when compared with p53 in both OKC and PA.

View Article: PubMed Central - PubMed

Affiliation: Department of Oral Pathology and Microbiology, Mar Baselios Dental College, Kothamangalam, Kerala, India.

ABSTRACT

Introduction: p53 protein is a product of p53 gene, which is now classified as a tumor suppressor gene. The gene is a frequent target for mutation, being seen as a common step in the pathogenesis of many human cancers. Proliferating cell nuclear antigen (PCNA) is an auxiliary protein of DNA polymerase delta and plays a critical role in initiation of cell proliferation.

Aim: The aim of this study is to assess and compare the expression of p53 and PCNA in lining epithelium of odontogenic keratocyst (OKC) and periapical cyst (PA).

Materials and methods: A total of 20 cases comprising 10 OKC and 10 PA were included in retrospective study. Three paraffin section of 4 μm were cut, one was used for routine hematoxylin and eosin stain, while the other two were used for immunohistochemistry. Statistical analysis was performed using Chi-square test.

Results: The level of staining and intensity were assessed in all these cases. OKC showed PCNA expression in all cases (100%), whereas in perapical cyst only 60% of cases exhibited PCNA staining. (1) OKC showed p53 expression in 6 cases (60%) whereas in PA only 10% of the cases exhibited p53 staining. Chi-square test showed PCNA staining intensity was more significant than p53 in OKC. (2) The staining intensity of PA using p53, PCNA revealed that PCNA stating intensity was more significant than p53.

Conclusion: OKC shows significant proliferative activity than PA using PCNA and p53. PCNA staining was more intense when compared with p53 in both OKC and PA.

No MeSH data available.


Related in: MedlinePlus

Histopathological features of periapical keracyst using (a) H and E, ×10, (b) PCNA, ×10
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Figure 5: Histopathological features of periapical keracyst using (a) H and E, ×10, (b) PCNA, ×10

Mentions: The present study showed, p53 and PCNA immunoreactivity in the nuclei of cells in basal and more predominantly in suprabasal layer of OKC and PA lining, with varying proportion and varied intensity [Figures 1–5]. P53 and PCNA were increased in OKC compared with PA. P53 and PCNA showed 60% and 100% expression, respectively in OKC compared to 10% and 60% in PA. Similarly, the intensity of staining was more (++) in 60% of OKC, whereas it was only 30% in PA.


Immunohistochemical study of p53 and proliferating cell nuclear antigen expression in odontogenic keratocyst and periapical cyst.

Sajeevan TP, Saraswathi TR, Ranganathan K, Joshua E, Rao UD - J Pharm Bioallied Sci (2014)

Histopathological features of periapical keracyst using (a) H and E, ×10, (b) PCNA, ×10
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4157281&req=5

Figure 5: Histopathological features of periapical keracyst using (a) H and E, ×10, (b) PCNA, ×10
Mentions: The present study showed, p53 and PCNA immunoreactivity in the nuclei of cells in basal and more predominantly in suprabasal layer of OKC and PA lining, with varying proportion and varied intensity [Figures 1–5]. P53 and PCNA were increased in OKC compared with PA. P53 and PCNA showed 60% and 100% expression, respectively in OKC compared to 10% and 60% in PA. Similarly, the intensity of staining was more (++) in 60% of OKC, whereas it was only 30% in PA.

Bottom Line: Chi-square test showed PCNA staining intensity was more significant than p53 in OKC. (2) The staining intensity of PA using p53, PCNA revealed that PCNA stating intensity was more significant than p53.OKC shows significant proliferative activity than PA using PCNA and p53.PCNA staining was more intense when compared with p53 in both OKC and PA.

View Article: PubMed Central - PubMed

Affiliation: Department of Oral Pathology and Microbiology, Mar Baselios Dental College, Kothamangalam, Kerala, India.

ABSTRACT

Introduction: p53 protein is a product of p53 gene, which is now classified as a tumor suppressor gene. The gene is a frequent target for mutation, being seen as a common step in the pathogenesis of many human cancers. Proliferating cell nuclear antigen (PCNA) is an auxiliary protein of DNA polymerase delta and plays a critical role in initiation of cell proliferation.

Aim: The aim of this study is to assess and compare the expression of p53 and PCNA in lining epithelium of odontogenic keratocyst (OKC) and periapical cyst (PA).

Materials and methods: A total of 20 cases comprising 10 OKC and 10 PA were included in retrospective study. Three paraffin section of 4 μm were cut, one was used for routine hematoxylin and eosin stain, while the other two were used for immunohistochemistry. Statistical analysis was performed using Chi-square test.

Results: The level of staining and intensity were assessed in all these cases. OKC showed PCNA expression in all cases (100%), whereas in perapical cyst only 60% of cases exhibited PCNA staining. (1) OKC showed p53 expression in 6 cases (60%) whereas in PA only 10% of the cases exhibited p53 staining. Chi-square test showed PCNA staining intensity was more significant than p53 in OKC. (2) The staining intensity of PA using p53, PCNA revealed that PCNA stating intensity was more significant than p53.

Conclusion: OKC shows significant proliferative activity than PA using PCNA and p53. PCNA staining was more intense when compared with p53 in both OKC and PA.

No MeSH data available.


Related in: MedlinePlus