Immunolocalization of Ki-67 in different periodontal conditions

| Posted in: Science

Journal name: Journal of Indian Society of Periodontology
Original article title: Immunolocalization of Ki-67 in different periodontal conditions
The Journal of Indian Society of Periodontology (JISP) publishes original scientific articles on periodontology (the study of supporting structures of teeth) and oral implantology. It is a bimonthly open-access journal with special issues for specific occasions.
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Original source:

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Author:

Penubolu Lakshmi Preethi, Suresh Rango Rao, Balaji Thodur Madapusi, Malathi Narasimhan


Journal of Indian Society of Periodontology:

(A bimonthly open-access journal)

Full text available for: Immunolocalization of Ki-67 in different periodontal conditions

Year: 2014 | Doi: 10.4103/0972-124X.131315

Copyright (license): CC BY-NC-SA


Summary of article contents:

Introduction

Chronic periodontitis is an inflammatory disease characterized by the destruction of the dental attachment apparatus, often leading to periods of remission and exacerbation. It is multifactorial, with tobacco smoking recognized as a significant risk factor due to its proven association with increased inflammation and cellular damage. The study of Ki-67, a non-histone nuclear protein expressed during active cell cycle phases, serves as a crucial marker for assessing cell proliferation in various inflammatory and malignant conditions. This research aimed to analyze the expression of Ki-67 in gingival tissues from smokers and non-smokers with both healthy gingiva and chronic periodontitis.

Ki-67 Expression in Gingival Tissues

The findings revealed distinct differences in Ki-67 expression across different groups. The study demonstrated that smokers with periodontitis had the highest mean number of Ki-67 positive cells (52.73 cells/field), followed by chronic periodontitis patients (44.05 cells/field), smokers without periodontitis (34.52 cells/field), and healthy controls (24.61 cells/field). Statistical analyses indicated significant differences between the healthy group and both periodontitis groups, highlighting how smoking exacerbates the inflammatory response and cellular proliferation in the gingival tissues. The elevated Ki-67 expression in smokers with periodontitis underscores the combined effects of tobacco-induced inflammation and impaired tissue repair, magnifying the cycle of periodontal disease progression.

Conclusion

The study concludes that Ki-67 is maximally expressed in smokers with chronic periodontitis, emphasizing the detrimental effects of tobacco on both cellular proliferation and the overall resolution of periodontal inflammation. This research contributes to our understanding of the underlying pathophysiological mechanisms in chronic periodontitis and the implications of smoking, suggesting targeted therapeutic strategies to combat periodontal disease and its complications. The ability to track Ki-67 levels may aid in diagnosing and monitoring the progression of periodontal diseases, particularly in smokers, thus enhancing patient management and outcomes.

FAQ section (important questions/answers):

What is the main objective of the study on Ki-67?

The main objective of the study is to analyze the expression of Ki-67 in gingival tissues using immunohistochemistry, comparing smokers and non-smokers with healthy gingiva and chronic periodontitis.

How were the study participants classified for the research?

The participants were classified into four groups: healthy control, non-smokers with chronic periodontitis, smokers without chronic periodontitis, and smokers with chronic periodontitis, based on specific inclusion and exclusion criteria.

What were the findings regarding Ki-67 expression among participants?

Ki-67 expression was highest in smokers with periodontitis, followed by chronic periodontitis, smokers without periodontitis, and healthy controls, indicating the influence of smoking and inflammation on cell proliferation.

What methods were used to evaluate Ki-67 expression in tissues?

Ki-67 expression was evaluated immunohistochemically using the streptavidin-biotin method, with tissue samples processed for specific staining and subsequent analysis under a microscope.

What implications do the findings have for understanding periodontal disease?

The findings suggest that Ki-67 plays a significant role in the pathogenesis of periodontal disease, illustrating how external factors like smoking influence cellular proliferation and inflammation.

Glossary definitions and references:

Scientific and Ayurvedic Glossary list for “Immunolocalization of Ki-67 in different periodontal conditions”. This list explains important keywords that occur in this article and links it to the glossary for a better understanding of that concept in the context of Ayurveda and other topics.

1) Table:
Table in this context refers to the organized data presentation that summarizes the findings of the study, making it easier for readers to understand the results of Ki-67 cell counts across different groups. Tables enhance clarity, allowing for quick comparisons and visual interpretations of statistical analyses.

2) Study (Studying):
Study signifies a systematic investigation into Ki-67 expression in gingival tissues to understand its role in periodontal disease among smokers and non-smokers. It outlines the research objectives, methodology, and implications, contributing to the body of knowledge regarding the cellular mechanisms underlying chronic periodontitis.

3) Field:
Field suggests a specified area of research or observation, in this instance, referring to the microscopic examination of gingival tissues. It underlines the significance of localized findings within the biological or clinical research domains, pointing to how environmental factors like smoking impact tissue health and cellular dynamics.

4) Inflammation:
Inflammation denotes the biological response of tissues to harmful stimuli, such as pathogens or irritants, often characterized by redness, swelling, and pain. In periodontal disease, inflammation plays a critical role, influencing cellular activities like proliferation, depicted through Ki-67 expression levels in the studied gingiva.

5) Disease:
Disease refers to a pathological condition affecting the normal functioning of tissues or organs. In this context, chronic periodontitis is the main focus, illustrating how inflammation and smoking habits adversely affect gum health, leading to significant periodontal tissue deterioration and cellular dysregulation as highlighted in the study.

6) Repair:
Repair indicates the biological processes aimed at healing and rejuvenation in damaged tissues after injury or disease. In the study, the role of Ki-67 is emphasized in the context of cellular proliferation, underlining the importance of tissue regeneration mechanisms during chronic periodontitis management and recovery.

7) Blood:
Blood is the fluid that circulates in the cardiovascular system, transporting essential nutrients, oxygen, and waste products. It is crucial for inflammation processes in periodontal disease, where inflammatory responses lead to increased blood flow and cellular infiltration, hence influencing Ki-67 expression as part of the healing process.

8) Bleeding:
Bleeding refers to the loss of blood from the vascular system, often indicating underlying tissue injury. In periodontal disease, bleeding on probing can serve as a clinical sign of inflammation and tissue destruction, correlating with increased Ki-67 expression as an indicator of cellular activity during the disease progression.

9) Reason:
Reason signifies the rationale or justification behind conducting the research, which here is to explore the effects of smoking on Ki-67 expression in gingival tissues. Understanding these reasons aids in recognizing contributing factors to chronic periodontitis and the cellular mechanisms involved in its pathogenesis.

10) Rheumatoid arthritis:
Rheumatoid arthritis (RA) is an autoimmune disease characterized by chronic inflammation of joints. Its mention in the context of the study emphasizes the broader relevance of Ki-67 expression across various inflammatory conditions, highlighting common pathway insights for therapeutic and preventive strategies pertinent to periodontal and systemic health.

11) Measurement:
Measurement refers to the quantitative assessment of variables, in this case, Ki-67 positivity in tissues. Accurate measurement methodology is vital for determining the statistical significance of findings, allowing for the comparison of cellular proliferation levels across different groups responding to periodontal disease and smoking habits.

12) Hand:
Hand possibly signifies the manual or physical involvement in the study, such as surgical techniques used during tissue sampling or histological preparation. It implies the essential human skill and precision applied during laboratory procedures that directly affect the quality and reliability of the research outcomes.

13) Post:
Post in the clinical context likely pertains to the actions or status after treatment or intervention. It reflects on how Ki-67 expression levels can indicate the effectiveness of periodontal therapies or the progression of disease, providing insights into post-treatment outcomes and tissue recovery dynamics.

14) Discussion:
Discussion is a section in academic research that interprets and contextualizes the findings. It connects rationales from the study with existing literature, provides critical analysis, and suggests practical implications of Ki-67 expression results on understanding chronic periodontitis, paving the way for future research directions.

15) Antibiotic (Antibacterial):
Antibiotic refers to substances used to combat bacterial infections. While not a direct focus of the Ki-67 study, understanding the potential use of antibiotics to manage periodontal infections post-intervention is crucial, as they may influence inflammatory responses and consequently cellular proliferation indicated by Ki-67.

16) Attending:
Attending connotes the presence or participation of patients in the study. This term underscores the clinical environment where the research took place, emphasizing the importance of patient selection criteria in gathering relevant data for analyzing Ki-67 expression in varying periodontal health statuses.

17) Activity:
Activity refers to the functionality or biological processes happening within the gingival tissues. It is tied to the study's focus on Ki-67, which indicates cellular activity associated with proliferation and inflammation in periodontal lesions, providing insights into the dynamic response of tissues to chronic disease.

18) Fixation:
Fixation is a crucial step in histological processing that preserves tissue structure for microscopic examination. It involves the use of chemical agents, ensuring that cellular morphology remains intact, which is essential for accurately assessing Ki-67 expression and understanding cellular responses in the studied tissues.

19) Pregnant:
Pregnant relates to the condition of carrying a developing fetus. This term is relevant for exclusion criteria in the study, emphasizing the focus on non-pregnant individuals to eliminate potential confounding factors that could influence immune responses and Ki-67 levels during periodontal disease assessment.

20) Sign:
Sign pertains to evidence or indicator that points to a specific condition or status. In the context of periodontal disease, signs such as bleeding or swelling provide clinicians with diagnostic information, and the study connects these signs with Ki-67 expression as an indicator of inflammatory activity in diseased tissues.

21) Drug:
Drug typically refers to a substance used for medical treatment. The mention here may relate to the potential pharmacological interventions considered for managing chronic periodontitis and modulating inflammatory responses, impacting Ki-67 expression, further underlining the study's relevance to therapeutic strategies in oral health management.

Other Science Concepts:

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Discover the significance of concepts within the article: ‘Immunolocalization of Ki-67 in different periodontal conditions’. Further sources in the context of Science might help you critically compare this page with similair documents:

Statistical analysis, Salient feature, Chronic periodontitis, Cell proliferation, Mean and standard deviation, Proinflammatory cytokine, Ki-67 expression, Clinical parameter, Healthy gingiva, Oxidative burden, Pack year.

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