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Piemonte ED, Gilligan GM, Garola F, Lazos JP, Panico RL, Normando AGC, Santos-Silva AR, Warnakulasuriya S. Differences among oral carcinomas arising de novo from those associated with oral potentially malignant disorders: a systematic review and meta-analysis. Oral Surg Oral Med Oral Pathol Oral Radiol 2024; 137:613-631. [PMID: 38609795 DOI: 10.1016/j.oooo.2024.03.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2023] [Revised: 02/14/2024] [Accepted: 03/08/2024] [Indexed: 04/14/2024]
Abstract
OBJECTIVE To analyze the frequency of sequential oral squamous cell carcinomas (s-OSCC), preceded by oral potentially malignant disorders, and OSCC de novo (OSCC-dn) and explore differences in their clinicopathologic presentations. STUDY DESIGN A structured electronic search strategy identified studies that analyzed frequency, clinical, biological, demographic, biomarkers, and prognostic features of s-OSCC and OSCC-dn according to PRISMA guidelines in PubMed, Scopus, Cochrane Library, and Google Scholar, up to January 31, 2023. Inclusion criteria were original English, Spanish, Portuguese, French, Italian, and German cross-sectional, cohort, and case-control studies. The quality of studies was assessed using the Agency for Research and Health Quality tool and the Newcastle-Ottawa Scale tool. RESULTS The final selection included 40 studies. OSCC-dn and s-OSCC represent, respectively, 71% and 29% of cases of OSCC (P = .00), showing a higher percentage of T1 or of T1+T2 in s-OSCC (P < .0001). The association meta-analysis showed OSCC-dn with a significant association. The meta-analysis showed that s-OSCC was significantly associated with smaller tumor size, absence of distant metastases, relapses, male sex, and tumor sites different from tongue; and OSCC-dn was associated with more advanced tumor size, more regional and distant metastases, more advanced stages, and worse survival. CONCLUSIONS S-OSCC was less frequent than expected. OSCC-dn seems to have specific clinical, biological, and prognostic features. Future perspectives on oral cancer prevention should address novel approaches and alternatives to screening, such as urgent referral of OSCC-dn.
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Affiliation(s)
- Eduardo David Piemonte
- Oral Medicine Department, Dentistry College, Universidad Nacional de Córdoba, Córdoba, Argentina.
| | - Gerardo Marcelo Gilligan
- Oral Medicine Department, Dentistry College, Universidad Nacional de Córdoba, Córdoba, Argentina
| | - Federico Garola
- Oral Medicine Department, Dentistry College, Universidad Nacional de Córdoba, Córdoba, Argentina
| | - Jerónimo Pablo Lazos
- Oral Medicine Department, Dentistry College, Universidad Nacional de Córdoba, Córdoba, Argentina
| | - René Luis Panico
- Oral Medicine Department, Dentistry College, Universidad Nacional de Córdoba, Córdoba, Argentina
| | - Ana Gabriela Costa Normando
- Oral Diagnosis Department, Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba, SP, Brazil
| | - Alan Roger Santos-Silva
- Oral Diagnosis Department, Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba, SP, Brazil
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Sepulveda Inostroza EA, Bressane A, Schwarzmeier LÂT, Lacerda EB, Anjos KRD, Santos TSPD, Cavalcanti DR, Nascimento FD, Almeida JD, Oliveira Alves MG. Evaluation of micronuclei, cytomorphometric and cytologic changes of the oral mucosa in hookah and cigarette smokers. Oral Surg Oral Med Oral Pathol Oral Radiol 2024; 137:640-650. [PMID: 38692958 DOI: 10.1016/j.oooo.2024.03.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Revised: 12/05/2023] [Accepted: 03/17/2024] [Indexed: 05/03/2024]
Abstract
OBJECTIVE To analyze the effect of hookah and cigarettes on the oral mucosa of smokers through the use of exfoliative cytology. STUDY DESIGN Smear samples were collected by exfoliative cytology from the tongue of 33 hookah smokers, 22 cigarette smokers, and 30 non-smokers. The selected analyses include micronuclei (MN), metanuclear anomalies, epithelial maturation, and cytomorphology (nuclear area [NA], cytoplasmic area [CA], and NA/CA ratio). RESULTS The largest differences observed for MN and metanuclear anomalies were between cigarette smokers and the control group (notably 1 MN P = .04; total cells with MN P = .039; total MN P = .042; karyorrhexis and binucleation, P = .0001). The hookah group, compared with the control group, showed the greatest differences for karyolysis (P = .0023), binucleation (P = .0003), and broken egg (P = .008). Significant differences were found between the smokers and the control groups regarding changes in the superficial cell without nucleus, perinuclear halo, vacuolization, color change, mucus, and keratohyalin granules. There was a significant increase in the NA and NA/CA ratio in the smoker groups. CONCLUSION This study showed that a combined analysis of exfoliative cytology associated with other diagnostic methods is a useful tool for studying oral carcinogenesis. Hookah and cigarettes showed similar effects in terms of displaying substantial cytogenetic and cytotoxic damage.
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Affiliation(s)
- Elvira Antonieta Sepulveda Inostroza
- Technology Research Center (NPT), Universidade Mogi das Cruzes, Mogi das Cruzes, Brazil; School of Dentistry, Universidade Mogi das Cruzes, Mogi das Cruzes, Brazil
| | - Adriano Bressane
- Department of Environmental Engineering, Institute of Science and Technology, São Paulo State University (Unesp), São José dos Campos, São Paulo, Brazil
| | | | | | - Karine Rodrigues Dos Anjos
- Research Center for Lasers and Applications - Nuclear and Energy Research Institute (IPEN)/University of São Paulo (USP), São Paulo, Brazil
| | | | | | - Fábio Dupart Nascimento
- Department of Biochemistry, Molecular Biology Division, Federal University of São Paulo (UNIFESP), São Paulo, Brazil
| | - Janete Dias Almeida
- Department of Biosciences and Oral Diagnosis, Institute of Science and Technology, São Paulo State University (Unesp), São José dos Campos, São Paulo, Brazil
| | - Mônica Ghislaine Oliveira Alves
- Technology Research Center (NPT), Universidade Mogi das Cruzes, Mogi das Cruzes, Brazil; Department of Biosciences and Oral Diagnosis, Institute of Science and Technology, São Paulo State University (Unesp), São José dos Campos, São Paulo, Brazil.
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Londoño-Velasco E, Asencio-Santofimio H, Ortega-Avila JG, Rosero-Caldón AB, Aristizabal-Grisales JC, Rey-Henao L, Vargas-Rivera JA, Vergara-Escudero E. Assessment of buccal mucosa genotoxicity in insecticide-exposed urban fumigators in Cali, Colombia. Int J Occup Med Environ Health 2024; 37:128-137. [PMID: 38264916 PMCID: PMC10959277 DOI: 10.13075/ijomeh.1896.02292] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2023] [Accepted: 12/20/2023] [Indexed: 01/25/2024] Open
Abstract
OBJECTIVES This study aimed to evaluate cytogenetic damage in the buccal mucosa of non-exposed subjects (N = 33) and insecticide-exposed fumigators (N = 31) in the urban area of Cali, Colombia. MATERIAL AND METHODS Through a questionnaire sociodemographic data, anthropometric measurements, state of health, and lifestyle were collected. Buccal micronucleus cytome (BMCyt) assay was using for evaluate cytogenetic damage. RESULTS The study showed that all fumigators used adequate personal protective equipment (PPE) and had low alcohol consumption. The authors did not find significant differences in BMCyt biomarkers between the groups (p > 0.05). Multivariate analysis showed a 13% increase in micronucleus (MN) frequency for every year of increasing age (OR = 1.13, p = 0.029), and higher MN with the decrease in daily fruit consumption (OR = 4.71, p = 0.084), without statistical significance. CONCLUSIONS The results between groups could be related to healthy habits and PPE use among the subjects. Int J Occup Med Environ Health. 2024;37(1):128-37.
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Affiliation(s)
- Elizabeth Londoño-Velasco
- Pontificia Universidad Javeriana Cali, Faculty of Health Sciences, Department of Basic Health Sciences, Cali, Colombia
| | - Helberg Asencio-Santofimio
- Pontificia Universidad Javeriana Cali, Faculty of Health Sciences, Department of Basic Health Sciences, Cali, Colombia
| | - Jose Guillermo Ortega-Avila
- Pontificia Universidad Javeriana Cali, Faculty of Health Sciences, Department of Basic Health Sciences, Cali, Colombia
| | - Aldair Beryery Rosero-Caldón
- Pontificia Universidad Javeriana Cali, Faculty of Health Sciences, Department of Basic Health Sciences, Cali, Colombia
| | | | - Laura Rey-Henao
- Pontificia Universidad Javeriana Cali, Faculty of Health Sciences, Department of Basic Health Sciences, Cali, Colombia
| | - Jairo Andres Vargas-Rivera
- Pontificia Universidad Javeriana Cali, Faculty of Health Sciences, Department of Basic Health Sciences, Cali, Colombia
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Paiva RL, de Figueiredo MAZ, Cherubini K, Da Silva VD, Salum FG. Cytological Screening Model of Normal Oral Mucosa Exposed to Carcinogens: A Pilot Study. Acta Cytol 2021; 66:114-123. [PMID: 34784590 DOI: 10.1159/000519877] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2021] [Accepted: 09/24/2021] [Indexed: 11/19/2022]
Abstract
INTRODUCTION Oral cytopathology is able to detect incipient cellular alterations, but it is not routinely applied to this purpose. We aimed to establish a model to screen individuals with no oral lesion exposed to smoking/alcohol, by means of the nuclear area, cell proliferation rate, and analysis of genetic damage. METHODS In this cross-sectional pilot study, 90 patients were allocated into 3 groups: oral cancer group (patients with oral squamous cell carcinoma), tobacco/alcohol group (patients without oral lesions and exposed to these risk factors), and control group (individuals with no lesion and not exposed to tobacco and alcohol). The cytological smears performed in these individuals were stained with Papanicolaou, a silver-staining and a Feulgen reaction. The nuclei of cells were measured, and AgNORs/nucleus and micronuclei (MN) were quantified. The cutoff values were stipulated evaluating the healthy mucosa (control group) and the cancerization field mucosa (oral cancer group). RESULTS Cutoff values for the screening of individuals exposed to carcinogens were ≥8% of nuclei larger than 100 μm2, ≥3.38 AgNOR/nucleus, and ≥3 MN per 1,000 cells. CONCLUSIONS Nuclear area measurement and AgNORs/nucleus and MN quantification identified the incipient phase of oral carcinogenesis. A screening model for individuals without oral lesion exposed to smoking/alcohol was proposed.
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Affiliation(s)
- Ricardo Losekann Paiva
- Department of Oral Medicine, School of Dentistry, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, Brazil
| | | | - Karen Cherubini
- Department of Oral Medicine, School of Dentistry, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, Brazil
| | | | - Fernanda Gonçalves Salum
- Department of Oral Medicine, School of Dentistry, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, Brazil
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Souza MRD, Hilário Garcia AL, Dalberto D, Martins G, Picinini J, Souza GMSD, Chytry P, Dias JF, Bobermin LD, Quincozes-Santos A, da Silva J. Environmental exposure to mineral coal and by-products: Influence on human health and genomic instability. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2021; 287:117346. [PMID: 34020260 DOI: 10.1016/j.envpol.2021.117346] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2021] [Revised: 05/06/2021] [Accepted: 05/07/2021] [Indexed: 06/12/2023]
Abstract
Environmental exposure to pollution generated by mining and burning coal is inevitable for people living nearby. Therefore, the aim of this study was to evaluate the influence of coal dust on health conditions and genomic instability of individuals who live near coal mines and thermoelectric power plants, and to relate the results to inorganic elements and inflammatory responses. Thus, we evaluated 284 individuals from four cities in the south of Brazil around a region with coal mines and a thermoelectric power plant (one city was considered a negative control). The results of the Comet assay and Micronucleus (MN) test did not show a genotoxic or mutagenic effect related to environmental exposure to coal, but the inflammatory cytokine tumor necrosis factor-α (TNF-α) was increased in all cities around the power plant when compared to the control conditions. Higher levels of MN were associated with body mass index and cardiovascular risk, and higher levels of Damage Index (DI), TNF-α and interleukin1β (IL-1β) with number of cigarettes/day. Principal component analysis (PCA) was used to integrate DNA damage and inflammatory results with inorganic elements. This study also demonstrated the relationship between zinc and MN, copper, and interleukin10 (IL-10), and among silicon and sulfur with DI and nucleoplasmic bridge. A relationship was also observed between the reduction of inorganic elements and both aging and quality of health. The use of different methodologies and the relationship between the results obtained in these studies, including different lifestyles, can increase the understanding of the interaction between this mineral and the health status of residents of regions affected by coal pollution.
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Affiliation(s)
- Melissa Rosa de Souza
- Laboratory of Genetic Toxicology, Postgraduate Program in Molecular and Cell Biology Applied to Health, Lutheran University of Brazil (ULBRA), Avenida Farroupilha, 8001 Bairro São José, CEP 92425-900, Canoas, RS, Brazil.
| | - Ana Letícia Hilário Garcia
- Laboratory of Genetic Toxicology, Postgraduate Program in Molecular and Cell Biology Applied to Health, Lutheran University of Brazil (ULBRA), Avenida Farroupilha, 8001 Bairro São José, CEP 92425-900, Canoas, RS, Brazil
| | - Daiana Dalberto
- Laboratory of Genetic Toxicology, Postgraduate Program in Molecular and Cell Biology Applied to Health, Lutheran University of Brazil (ULBRA), Avenida Farroupilha, 8001 Bairro São José, CEP 92425-900, Canoas, RS, Brazil
| | - Gabriela Martins
- Laboratory of Genetic Toxicology, Postgraduate Program in Molecular and Cell Biology Applied to Health, Lutheran University of Brazil (ULBRA), Avenida Farroupilha, 8001 Bairro São José, CEP 92425-900, Canoas, RS, Brazil
| | - Juliana Picinini
- Laboratory of Genetic Toxicology, Postgraduate Program in Molecular and Cell Biology Applied to Health, Lutheran University of Brazil (ULBRA), Avenida Farroupilha, 8001 Bairro São José, CEP 92425-900, Canoas, RS, Brazil
| | | | - Paola Chytry
- Ion Implantation Laboratory, Institute of Physics, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
| | - Johnny Ferraz Dias
- Ion Implantation Laboratory, Institute of Physics, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
| | - Larissa Daniele Bobermin
- Departamento de Bioquímica, Programa de Pós-Graduação em Ciências Biológicas: Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul (UFRGS), Rua Ramiro Barcelos, 2600-Anexo, Bairro Santa Cecília, Porto Alegre, RS, 90035-003, Brazil
| | - André Quincozes-Santos
- Departamento de Bioquímica, Programa de Pós-Graduação em Ciências Biológicas: Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul (UFRGS), Rua Ramiro Barcelos, 2600-Anexo, Bairro Santa Cecília, Porto Alegre, RS, 90035-003, Brazil
| | - Juliana da Silva
- Laboratory of Genetic Toxicology, Postgraduate Program in Molecular and Cell Biology Applied to Health, Lutheran University of Brazil (ULBRA), Avenida Farroupilha, 8001 Bairro São José, CEP 92425-900, Canoas, RS, Brazil
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Clinical Trials of Limbal Stem Cell Deficiency Treated with Oral Mucosal Epithelial Cells. Int J Mol Sci 2020; 21:ijms21020411. [PMID: 31936462 PMCID: PMC7014181 DOI: 10.3390/ijms21020411] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2019] [Revised: 01/04/2020] [Accepted: 01/07/2020] [Indexed: 12/11/2022] Open
Abstract
The corneal surface is an essential organ necessary for vision, and its clarity must be maintained. The corneal epithelium is renewed by limbal stem cells, located in the limbus and in palisades of Vogt. Palisades of Vogt maintain the clearness of the corneal epithelium by blocking the growth of conjunctival epithelium and the invasion of blood vessels over the cornea. The limbal region can be damaged by chemical burns, physical damage (e.g., by contact lenses), congenital disease, chronic inflammation, or limbal surgeries. The degree of limbus damage is associated with the degree of limbal stem cells deficiency (partial or total). For a long time, the only treatment to restore vision was grafting part of the healthy cornea from the other eye of the patient or by transplanting a cornea from cadavers. The regenerative medicine and stem cell therapies have been applied to restore normal vision using different methodologies. The source of stem cells varies from embryonic stem cells, mesenchymal stem cells, to induced pluripotent stem cells. This review focuses on the use of oral mucosa epithelial stem cells and their use in engineering cell sheets to treat limbal stem cell deficient patients.
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Mhaske SP, Pattanshetti K, Jagtap K, Debta P, Misurya AL, Patel JH. Comparative Study using Papanicolaou Stain and Silver-stained Nucleolar Organizer Region Counts in Exfoliative Smear of Oral Mucosa in Bidi Smokers and Nonsmokers. J Int Soc Prev Community Dent 2018; 8:365-370. [PMID: 30123772 PMCID: PMC6071356 DOI: 10.4103/jispcd.jispcd_65_18] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2018] [Accepted: 03/29/2018] [Indexed: 11/23/2022] Open
Abstract
Aim: The aim of this study is to compare the proliferative activity of exfoliated cells in bidi smoker's and nonsmoker's oral mucosa. Materials and Methods: The oral mucosal exfoliate smears were prepared from 40 individuals (20 nonsmokers and 20 smokers) with the age group ranging from 25 to 70 years, in and around Akola (Maharashtra). The Papanicolaou (PAP) stain and silver-stained nucleolar organizer region (AgNOR) were used to prepare cytogenic smear to evaluate the presence of cytological alterations, suggestive of inflammation, dysplasia, keratinization, and proliferative activity of epithelial cells. The present study involves PAP Class I and Class II smears. The obtained data were tabulated and statistically analyzed using statistical software IBM SPSS IBM Corp., Statistics for Windows, Version 20.0. Armonk, NY, USA: IBM Corp., and using t-test. Results: There was a significant difference in mean number of AgNORs/nucleus between nonsmokers (0.947 ± 0.2533) and smokers (3.021 ± 0.2256). There were 90% inflammatory changes observed in smokers whereas nonsmokers showed only 75% changes. PAP Class II changes, i.e., significant proliferative activity, were found between smokers and nonsmokers mucosa. Conclusion: A significant difference of AgNORs/nucleus was found between nonsmokers and smokers.
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Affiliation(s)
| | - Kirti Pattanshetti
- Department of Pedodontics and Preventive Dentistry, Maitri College of Dentistry and Research Centre, Durg, Chhattisgarh, India
| | - Kiran Jagtap
- Department of Oral Pathology, SMBT Institute of Dental Sciences and Research, Nashik, Maharashtra, India
| | - Priyanka Debta
- Department of Oral Pathology and Microbiology, Institute Dental Sciences, SOA (Deemed to Be University), Bhubaneswar, Odisha, India
| | - Archana Lanje Misurya
- Department of Oral Pathology, Maharana Pratap College of Dentistry and Research Centre, Gwalior, Madhya Pradesh, India
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Bernardi L, Souza BCD, Sonda NC, Visioli F, Rados PV, Lamers ML. Effects of Diabetes and Hypertension on Oral Mucosa and TGFβ1 Salivary Levels. Braz Dent J 2018; 29:309-315. [PMID: 29972459 DOI: 10.1590/0103-644020181868] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2017] [Accepted: 03/27/2018] [Indexed: 11/21/2022] Open
Abstract
The aim of this study was to investigate salivary levels of TGFβ1 and proliferation/ maturation of epithelial mucosa cells in diabetic and hypertensive patients. DESIGN in this cross-sectional study, whole stimulated saliva and oral mucosa exfoliative cytology specimens were collected from 39 patients that were healthy (control, n=10) or presented history of arterial hypertension (HAS, n=9), diabetes mellitus (DM, n=10) or both (DM+HAS, n=10). Salivary flow rate (SFR), TGFβ1 level in saliva, AgNORs and the epithelial maturation were evaluated. Non-parametric Kruskal-Wallis test, followed by Dunn's multiple comparison post-test and the Spearman test correlation analysis were used. SFR showed a significant decreased in DM and DM+HAS (0.47±0.11 and 0.64±0.43 mL/min) when compared to control (1.4±0.38 mL/min). DM+HAS presented the highest value of TGFβ1 concentration (24.72±5.89 pg/mL). It was observed a positive correlation between TGFβ1 and glycaemia (R=0.6371; p<0.001) and a negative correlation between TGFβ1 and saliva (R=-0.6162; p<0.001) and glycaemia and SFR (R=-0.5654; P=0.001). AgNORs number and status of maturation of mucosa cells were similar for all conditions. DM and DM+HAS presented the lowest SFR, which correlated with increased TGFβ1 levels. Despite the higher TGFβ1 secretion it was not observed changes in the morphology or proliferation of epithelial cells when diabetes or hypertension was present.
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Affiliation(s)
- Lisiane Bernardi
- Basic Research Center, Dentistry School, UFRGS - Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Bárbara Capitanio de Souza
- Basic Research Center, Dentistry School, UFRGS - Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Nicole Canalli Sonda
- Basic Research Center, Dentistry School, UFRGS - Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Fernanda Visioli
- Department of Oral Pathology, Dentistry School, UFRGS - Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Pantelis Varvaki Rados
- Department of Oral Pathology, Dentistry School, UFRGS - Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Marcelo Lazzaron Lamers
- Department of Morphological Sciences, UFRGS - Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
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Murgod S, Channabasaviah GH, Shivamurthy DM, Ashok L, Krishnappa SJ. Prognostic potential of AgNORs in oral submucous fibrosis. J Int Soc Prev Community Dent 2016; 6:167-75. [PMID: 27114958 PMCID: PMC4820578 DOI: 10.4103/2231-0762.178746] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Aim and Objective: The role of prognosis cannot be stressed enough, especially when it comes to potentially malignant lesions. The argyrophilic nucleolar organizer regions (AgNORs), which is simple and cost-effective has been used in diagnostic and prognostic pathologies. This study seeks to identify the nucleolar organizer regions (NORs) in oral submucous fibrosis (OSMF), to correlate the AgNOR count with the histologic grade of OSMF, and to evaluate the prognostic potential of AgNOR. Materials and Methods: The sample size consisted of archival paraffin blocks of 35 cases of varying grades of OSMF and 10 cases of squamous cell carcinoma. Normal mucosa samples served as controls for the study. AgNOR staining in accordance with the method of Smith and Crocker was performed and Student's t-test was used for statistical analysis. Results: The results showed an increase in AgNOR counts with corresponding grades of OSMF, the count being least in normal mucosa and also an increase in AgNOR count with corresponding decrease in differentiation of oral squamous cell carcinoma. Conclusion: AgNOR staining is a rapid and inexpensive procedure representing cellular proliferation that can be used to assess the nature of the lesion and therefore, the prognosis.
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Affiliation(s)
- Sanjay Murgod
- Department of Oral Pathology, Rajarajeswari Dental College, Bangalore, Karnataka, India
| | | | | | - Lingappa Ashok
- Department of Oral Pathology, Rajarajeswari Dental College, Bangalore, Karnataka, India
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10
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Rajmohan M, Naidu RM, Thamaraiselvi D, M D. In Vivo Autofluorescence Spectroscopic Study and Evaluation of DNA Damage By Comet Assay in Smokers. J Clin Diagn Res 2015; 9:ZC16-9. [PMID: 26155555 DOI: 10.7860/jcdr/2015/13805.5874] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2015] [Accepted: 03/30/2015] [Indexed: 12/17/2022]
Abstract
CONTEXT Tobacco is known environmental factor to alter the chemical composition of cells and the structure of DNA. Cellular level changes of smoker's mucosa are assessed by autofluorescence spectroscopy and the DNA damage can be evaluated by single cell gel electrophoresis (comet assay). AIM To substantiate the changes in the autofluorescence due to smoking with that of early DNA damage without any clinical change. MATERIALS AND METHODS Group I consists of 20 individuals with normal mucosa and Group II consists of 40 individuals with smoking habit. Only males were included in this study and their age ranging from 25 to 35 years. In vivo fluorescence spectra from both groups were obtained by using hand held fiber optic probe attached to Varian Cary Eclipse fluorescence spectrophotometer and comet assay was carried out for normal and smokers by their peripheral blood. STATISTICAL ANALYSIS USED Independent-Samples t-test was used for statistical analysis. P-value was obtained to discriminate the statistical differences between the two groups. RESULTS The averaged excitation and emission spectra of normal and smoker's mucosa showed significant differences statistically. In comet assay, the mean tail length of smoker group was higher than the normal group. The results showed statistically significant differences (p ≤ 0.05). CONCLUSION These techniques will be very useful for monitoring of very early changes of mucosa before clinical manifestation of the lesion in high risk smokers and thus prevents the occurrence of premalignant disorders and early invasive carcinoma.
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Affiliation(s)
- M Rajmohan
- Professor, Department of Oral & Maxillofacial Pathology, KSR Institute of Dental Science & Research , Tiruchengode, Tamil Nadu, India
| | - R Murali Naidu
- Professor, Department of Oral & Maxillofacial Pathology, Rajah Muthiah Dental College & Hospital , Annamalai University, Annamalai Nagar, Tamil Nadu, India
| | - D Thamaraiselvi
- Senior Lecturer, Department of Oral & Maxillofacial Pathology, Rajah Muthiah Dental College & Hospital , Annamalai University, Annamalai Nagar, Tamil Nadu, India
| | - Deepasree M
- Senior Lecturer, Department of Oral & Maxillofacial Pathology, Rajah Muthiah Dental College & Hospital , Annamalai University, Annamalai Nagar, Tamil Nadu, India
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