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Arvindh S, Priyadarshini M, Baba AB, Veeravarmal V, Mishra R, Dash R, Nagini S. The Neem Limonoid Nimbolide Modulates Key Components of the DNA Damage Response Signalling in Cellular and Animal Models of Oral Squamous Cell Carcinoma. Curr Pharm Biotechnol 2024; 25:CPB-EPUB-139446. [PMID: 38561609 DOI: 10.2174/0113892010291998240321074920] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2023] [Revised: 02/02/2024] [Accepted: 02/12/2024] [Indexed: 04/04/2024]
Abstract
BACKGROUND Deregulated DNA damage response (DDR) network is implicated in cancer progression and therapy resistance. OBJECTIVE The present study was designed to investigate whether nimbolide, an anticancer neem limonoid, targets key components of the DDR signalling pathway in cellular and animal models of oral squamous cell carcinoma (OSCC). METHODS OSCC cells (SCC-4 and SCC-9), 7,12-dimethylbenz[a]anthracene (DMBA)-induced hamster buccal pouch (HBP) carcinoma model, chemoresistant OSCC patient-derived xenograft (PDX) model established in athymic nude mice, and tissue sections from patients with oral premalignant/malignant disease were used for the study. Key molecules that orchestrate the DDR, including the MRN complex, ATM, DNA-PKcs, H2AX, and p53, were analysed by qRT-PCR, immunoblotting, immunofluorescence, and immunohistochemistry. Cell proliferation and apoptosis indices were evaluated. RESULTS Nimbolide significantly reduced 8-oxodG levels, expression of MRN, ATMS1891, and γ-H2AX, with an increase in p-p53S15 in OSCC cells as well as in the HBP model. Nimbolide potentiated the effect of KU-55933 in ATM inhibition. In the PDX model, nimbolide suppressed tumor formation, stimulated DDR and apoptosis, inhibited cell proliferation, and enhanced sensitivity to cisplatin. Analysis of p-ATM expression revealed a significant increase during the sequential progression of hamster and human OSCC. CONCLUSIONS This study provides compelling evidence that nimbolide functions as a DDR inhibitor in cellular and hamster OSCC models and as a DDR activator in the PDX model primarily by targeting ATM. Small molecules like nimbolide that modulate DDR are of immense benefit in cancer therapy. The study has also unveiled p-ATM as a promising biomarker of tumour progression in human OSCCs.
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Affiliation(s)
- Soundararajan Arvindh
- Department of Biochemistry & Biotechnology, Faculty of Science, Annamalai University, Annamalainagar, 608002,
Tamil Nadu, India
| | | | - Abdul Basit Baba
- Advanced Centre for Human Genetics, Sher-i-Kashmir Institute of Medical Sciences (SKIMS), Srinagar, Jammu & Kashmir, 190011, India
| | - Veeran Veeravarmal
- Division of Oral and Maxillofacial Pathology, Government Dental College and Hospital, Cuddalore District, 608 002, Tamil Nadu, India
| | - Rajakishore Mishra
- Department of Life Sciences, School of Natural Sciences, Central University of Jharkhand, Ratu-Lohardaga Road, Brambe, Ranchi, 835205, Jharkhand, India
| | - Rupesh Dash
- Institute of Life Sciences, Bhubaneswar, Odisha, 751023, India
| | - Siddavaram Nagini
- Department of Biochemistry & Biotechnology, Faculty of Science, Annamalai University, Annamalainagar, 608002,
Tamil Nadu, India
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Mary SJ, Veeravarmal V, Thankappan P, Arumugam P, Augustine PI, Franklin R. Anti-cancer effects of green synthesized gold nanoparticles using leaf extract of Annona muricata. L against squamous cell carcinoma cell line 15 through apoptotic pathway. Dent Res J (Isfahan) 2024; 21:14. [PMID: 38476717 PMCID: PMC10929727] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2023] [Revised: 11/10/2023] [Accepted: 11/28/2023] [Indexed: 03/14/2024] Open
Abstract
Background Oral cancer remains one of the most dreadful diseases in developing nations. Currently, there has been a rise in the prevalence of tongue squamous cell carcinoma (SCC), with a poor prognosis. The use of standard treatment approaches against oral cancer patients brings about several side effects. In recent years, nanomedicine has provided a versatile platform for developing new targeted therapeutic modalities. However, safety remains a concern in the synthesis of nanoparticles (NPs). Therefore, the present study aims to synthesize safer phytoconstituent-mediated gold NPs (AuNPs) utilizing leaf extracts of Annona muricata, where the biochemical components of the plant leaf act as the reducing and capping agents in the synthesis of NPs, and to evaluate its anti-cancer activity against SCC. Materials and Methods In this in vitro experimental study, AuNPs were synthesized through an effective, simple, and ecologically sound green synthesis method. After characterization of these synthesized AuNPs, in vitro assays such as 3-(4, 5-dimethylthiazole2-yl)-2, 5-biphenyl tetrazolium bromide, wound healing, and clonogenic assays were carried out to investigate the anti-cancer potential of green synthesized AuNPs in the human tongue SCC cell line (SCC-15), and the possible mechanism of action was evaluated through gene and protein expression analysis of Bax, Bcl-2, and p53 genes. The results were expressed as mean ± standard deviation using Statistical Package for Social Sciences (SPSS) 20.0 software and Student's t-test was performed for experimental data. P ≤0.05 were considered statistically significant. Results The in vitro assays demonstrated that the synthesized AuNPs are exhibiting anti-cancer activity by apoptosis of SCC-15 cells in a dose-dependent manner. Further, it also revealed a highly significant decrease in anti-apoptotic Bcl-2 gene expression, whereas pro-apoptotic genes p53 and Bax revealed a highly significant increase, which is statistically significant compared to the control (P < 0.05). Conclusion Our findings demonstrated that the AuNPs synthesized from A. muricata leaf extract could act as a novel anticancer agent, particularly against SCC, after further scrutiny.
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Affiliation(s)
- S. Jeslin Mary
- Department of Oral and Maxillofacial Pathology, Sree Mookambika Institute of Dental Sciences, Kanyakumari, Tamil Nadu, India
| | - Veeran Veeravarmal
- Department of Oral and Maxillofacial Pathology, Government Dental College, Cuddalore, Tamil Nadu, India
| | - Prasanth Thankappan
- Department of Oral and Maxillofacial Pathology, Sree Mookambika Institute of Dental Sciences, Kanyakumari, Tamil Nadu, India
| | - Paramasivam Arumugam
- Center for Cellular and Molecular Research, Saveetha Dental College and Hospital, Saveetha University, Chennai, Tamil Nadu, India
| | - Percy Ida Augustine
- Consultant, Oral and Maxillofacial Pathologist, Joannas Dental Care, Tamil Nadu, India
| | - R. Franklin
- Department of Oral and Maxillofacial Pathology, Sree Mookambika Institute of Dental Sciences, Kanyakumari, Tamil Nadu, India
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Rajendran R, Arunachalam JP, Chidambaram S, Krishnagopal S, Krishnamurthy B, Vinayagam S, Veeravarmal V, Prasad H, Verma K, U R A. Protein Drug Delivery Using a Novel Maxillofacial Technique Targeting the Visual Pathway in the Brain, the Optic Nerve, and the Retina. ACS Chem Neurosci 2023; 14:3368-3384. [PMID: 37665674 DOI: 10.1021/acschemneuro.3c00184] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/06/2023] Open
Abstract
Protein drugs are used for treating many diseases of the eye and the brain. The formidable blood neural barriers prevent the delivery of these drugs into the eye and the brain. Hence, there is a need for a protein drug delivery system to deliver large proteins across blood-neural barriers. Low half-life, poor penetration of epithelial barriers, low stability, and immunogenicity limit the use of non-invasive systemic routes for delivering proteins. In this pre-clinical study, the efficacy of a new maxillofacial route for administering protein drugs using a novel drug delivery system is compared with systemic administration through intra-peritoneal injection and ocular administration through topical eye drops and subconjunctival and intravitreal injections. Bevacizumab and retinoschisin proteins were administered using the maxillofacial technique along with systemic and ocular routes in wild-type male C57BL/6J mice. Liquid chromatography with tandem mass spectrometry and western blot was used to detect bevacizumab in tissue samples. Furthermore, immunohistochemistry was performed to detect the presence and localization of bevacizumab and retinoschisin in the retina and brain. The maxillofacial route of delivery could target the brain including regions involved in the visual pathway and optic nerve. The maxillofacial technique and intravitreal injection were effective in delivering the drugs into the retina. A new concept based on the glymphatic pathway, cerebrospinal fluid drug distribution, and the crossover of ipsilateral optic nerve fibers at optic chiasma is proposed to explain the presence of the drug in contralateral eye following maxillofacial administration and intravitreal injection.
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Affiliation(s)
- Rahini Rajendran
- Central Inter-Disciplinary Research Facility, Sri Balaji Vidyapeeth [Deemed to be University], SBV-Mahatma Gandhi Medical College & Research Institute Campus, Puducherry 607402, India
| | - Jayamuruga Pandian Arunachalam
- Central Inter-Disciplinary Research Facility, Sri Balaji Vidyapeeth [Deemed to be University], SBV-Mahatma Gandhi Medical College & Research Institute Campus, Puducherry 607402, India
| | - Subbulakshmi Chidambaram
- Sensory Neural Engineering and Cell Therapeutics Lab, Department of Biochemistry and Molecular Biology, Pondicherry University, Puducherry 605014, India
| | - Srikanth Krishnagopal
- Department of Ophthalmology, Sri Balaji Vidyapeeth [Deemed to be University], Mahatma Gandhi Medical College & Research Institute, Puducherry 607402, India
| | - Bhavani Krishnamurthy
- Department of Pathology, Sri Balaji Vidyapeeth [Deemed to be University], Mahatma Gandhi Medical College & Research Institute, Puducherry 607402, India
| | - Subha Vinayagam
- Department of Pharmacology, Sri Balaji Vidyapeeth [Deemed to be University], Mahatma Gandhi Medical College & Research Institute, Puducherry 607402, India
| | - Veeran Veeravarmal
- Department of Oral & Maxillofacial Pathology and Oral Microbiology, Government Dental College, Cuddalore, Annamalai Nagar, Chidambaram 608002, Tamil Nadu, India
| | - Harikrishnan Prasad
- Department of Oral Pathology and Microbiology, KSR Institute of Dental Science and Research, Tiruchengode 637215, Tamil Nadu, India
| | - Kavita Verma
- UR Anoop Research Group, Puducherry 605008, India
| | - Anoop U R
- UR Anoop Research Group, Puducherry 605008, India
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Mary SJ, Veeravarmal V, Thankappan P, Angelin D, Franklin R, Girish KL. Evaluation of the cytotoxic, anti-proliferative, anti-metastatic and pro-apoptotic effect of aqueous leaf extract of Annona muricata on oral tongue squamous cell carcinoma cell line (SCC-15): An in vitro study. J Oral Maxillofac Pathol 2023; 27:469-475. [PMID: 38033979 PMCID: PMC10683899 DOI: 10.4103/jomfp.jomfp_299_23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2023] [Revised: 07/20/2023] [Accepted: 08/07/2023] [Indexed: 12/02/2023] Open
Abstract
Background Oral cancer still represents the leading cause of mortality in India. Due to the drawbacks of current treatment options, a safe, low-cost therapy is the need of the hour. Recently, novel plant extracts with anti-cancer properties have gained greater attention. One among them is Annona muricata and its leaf extract, which has been studied for its anti-cancer effect against various cancers. However, studies on oral cancer cells are very much limited and hence the study. Aims To evaluate the cytotoxic, anti-proliferative, anti-metastatic and pro-apoptotic effect of aqueous leaf extract of Annona muricata (ALEAM) against SCC-15 cell lines through in vitro assays. Materials and Methods In vitro assays such as MTT [3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide], colony formation and wound healing assays were performed. Furthermore, to evaluate the underlying mechanism, gene and protein expression analysis of apoptotic/anti-apoptotic marker genes Bax, P53 and Bcl2, were done using quantitative real-time polymerase chain reaction (qRT-PCR) and Western blot analysis. Student's t-test has been performed for analysis of experimental data. Results The results showed that ALEAM exhibited significant cytotoxic activity in a dose-dependent manner as well as inhibited colony formation and cell migration. The pro-apoptotic properties were affirmed by a highly significant drop in Bcl-2 gene expression and a highly significant rise in P53 and Bax genes in the study group compared to the control (P < 0.05). Conclusion The current study provides evidence that ALEAM has the potential to be developed as a novel anti-cancer drug for the treatment of SCC after further clinical studies.
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Affiliation(s)
- S. Jeslin Mary
- Department of Oral and Maxillofacial Pathology, Sree Mookambika Institute of Dental Sciences, Kulasekharam, Kanyakumari District, Tamil Nadu, India
| | - Veeran Veeravarmal
- Department of Oral and Maxillofacial Pathology, Government Dental College Cuddalore, Tamil Nadu, India
| | - Prasanth Thankappan
- Department of Oral and Maxillofacial Pathology, Sree Mookambika Institute of Dental Sciences, Kulasekharam, Kanyakumari District, Tamil Nadu, India
| | - D Angelin
- Department of Oral and Maxillofacial Pathology, Sree Mookambika Institute of Dental Sciences, Kulasekharam, Kanyakumari District, Tamil Nadu, India
| | - R Franklin
- Department of Oral and Maxillofacial Pathology, Sree Mookambika Institute of Dental Sciences, Kulasekharam, Kanyakumari District, Tamil Nadu, India
| | - KL Girish
- Department of Oral and Maxillofacial Pathology, Sree Mookambika Institute of Dental Sciences, Kulasekharam, Kanyakumari District, Tamil Nadu, India
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Jasmine S, Thangavelu A, Veeravarmal V, Vijayakumar N, Khan JM, Ahmad A. Quantitative assessment of platelet rich fibrin for the repair of extraction socket in a rat model. Int J Biol Macromol 2022; 222:1168-1174. [PMID: 36179874 DOI: 10.1016/j.ijbiomac.2022.09.235] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Revised: 09/22/2022] [Accepted: 09/26/2022] [Indexed: 11/30/2022]
Abstract
The present study evaluated the quantitative effects of platelet-rich fibrin (PRF) for the repair of extraction socket in Sprague Dawley (SD) rat model by assessing several key clinical parameters. Seventy two male SD rats were subjected to surgical extraction of the maxillary right incisor. Rats were randomly divided into four groups with eighteen rats in each group based on the treatment received: extraction socket without treatment of PRF was taken as control (group I). Extraction socket implanted with 0.1, 0.2, and 0.4 mL of PRF was taken as study groups (groups II, III, and IV). The obtained results demonstrated that, low dose of PRF efficiently enhanced the natural healing cascade. Whereas, high dose interfered with native tissue contribution and altered the natural healing process. The beneficial effects of quantity-based application of PRF may raise the possibility of a new approach as complementary therapy besides conventional treatment.
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Affiliation(s)
- Sharmila Jasmine
- Department of Oral Maxillofacial surgery, Rajas Dental College and Hospital, Kavalkinaru, Tirunelveli 627105, Tamil Nadu, India.
| | - Annamalai Thangavelu
- Department of Oral Maxillofacial surgery, Rajah Muthiah Dental College and Hospital, Annamalai University, Annamalainagar - 608002, Chidambaram, Tamil Nadu, India
| | - Veeran Veeravarmal
- Department of Oral Maxillofacial Pathology and Oral Microbiology, Rajah Muthiah Dental College and Hospital, Annamalai University, Annamalainagar - 608002, Chidambaram, Tamil Nadu, India
| | - Natesan Vijayakumar
- Department of Biochemistry & Biotechnology, Faculty of Science, Annamalai University, Annamalainagar - 608002, Chidambaram, Tamilnadu, India
| | - Javed Masood Khan
- Department of Food Science and Nutrition, College of Food and Agricultural Sciences, King Saud University, Riyadh 11451, Saudi Arabia
| | - Anis Ahmad
- Miller School of Medicine, University of Miami, FL-33136, USA
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Aparnadevi P, Nirmal R, Veeravarmal V, Nandini D, Kalyani C, Singh D, Yoithapprabhunath T. Cyclooxygenase-2 (COX-2) expression in oral submucous fibrosis and oral squamous cell carcinoma: An immunohistochemical study. J Pharm Bioallied Sci 2022; 14:S769-S773. [PMID: 36110596 PMCID: PMC9469252 DOI: 10.4103/jpbs.jpbs_135_22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2022] [Revised: 02/14/2022] [Accepted: 02/15/2022] [Indexed: 11/04/2022] Open
Abstract
Introduction: Material and Methods: Results: Conclusion:
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Sivakumar M, Yoithapprabhunath TR, Nirmal RM, Veeravarmal V, Dineshshankar J, Amsaveni R. Immunohistochemical analysis of Nuclear Factor-kappa B (NF-κB) between follicular and plexiform ameloblastomas: A pilot study. J Oral Maxillofac Pathol 2021; 24:466-471. [PMID: 33967482 PMCID: PMC8083443 DOI: 10.4103/jomfp.jomfp_150_20] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2020] [Revised: 08/13/2020] [Accepted: 09/04/2020] [Indexed: 12/04/2022] Open
Abstract
Background: Ameloblastoma among benign tumors holds a unique position by its locally destructive and invasive nature. Tumors that originate from the odontogenic apparatus or its remnants in the jaws show diverse clinical presentations, behavior and histologic patterns. The differed biological behavior behind follicular and plexiform ameloblastomas has never attained completeness because of the lack of rhythmic correlation regarding the exact mechanism. Nuclear factor-kappa B (NF-κB) pathways play a crucial role in survival, death and differentiation during physiologic and pathologic conditions. With this background, the study has been aimed to investigate the expression of NF-κB in follicular and plexiform ameloblastomas. Objective: The objective of this study was to analyze the immunohistochemical expression pattern of NF-κB in ameloblastoma and to compare the immunohistochemical expression pattern of NF-κB among the histological types of ameloblastoma, follicular and plexiform patterns. Methodology: Total 20 ameloblastomas (10 follicular, 10 plexiform) were immunostained with antihuman NF-κB p65 mouse IgG monoclonal antibody, and the pattern of staining is statistically analyzed using Chi-square test with the level of significance (P < 0.05). Results: Twelve (3 follicular, 9 plexiform) out of 20 ameloblastomas showed immunoreactivity to NF-κB p65. In ameloblastoma, only the peripheral preameloblast-like tall columnar cells showed reactivity, whereas the stellate reticulum-like cells are immunonegative. The staining pattern was membranous in the immunoreactive cells. The results were studied with the associated and inducing pathways from the literature, and a possible mechanism has been proposed. Conclusion: The expression pattern of NF-κB was found to be higher in plexiform ameloblastoma than follicular ameloblastoma.
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Affiliation(s)
- Muniapillai Sivakumar
- Department of Oral and Maxillofacial Pathology, Madha Dental College and Hospital, Chennai, Tamil Nadu, India
| | | | - Ramadas Madhavan Nirmal
- Department of Oral and Maxillofacial Pathology, Rajah Muthiah Dental College and Hospital, Chidambaram, Tamil Nadu, India
| | - Veeran Veeravarmal
- Department of Oral and Maxillofacial Pathology, Rajah Muthiah Dental College and Hospital, Chidambaram, Tamil Nadu, India
| | - Janardhanam Dineshshankar
- Department of Oral and Maxillofacial Pathology, Vivekanandha Dental College for Women, Namakkal, Tamil Nadu, India
| | - Ramamoorthy Amsaveni
- Department of Oral and Maxillofacial Pathology, Rajah Muthiah Dental College and Hospital, Chidambaram, Tamil Nadu, India
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Ranjani S, Kowshik J, Sophia J, Nivetha R, Baba AB, Veeravarmal V, Joksić G, Rutqvist LE, Nilsson R, Nagini S. Activation of PI3K/Akt/NF-kB Signaling Mediates Swedish Snus Induced Proliferation and Apoptosis Evasion in the Rat Forestomach: Modulation by Blueberry. Anticancer Agents Med Chem 2019; 20:59-69. [PMID: 31696813 DOI: 10.2174/1871520619666191024115738] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2019] [Revised: 06/23/2019] [Accepted: 07/17/2019] [Indexed: 12/23/2022]
Abstract
BACKGROUND AND OBJECTIVES The present study was undertaken to ascertain whether the modulatory effects of blueberries on cell proliferation induced by Swedish snus in the rat forestomach epithelium is mediated via abrogation of the PI3K/Akt/NFκB signaling axis that regulates cell fate decision. METHODS The transcript and protein expression of genes involved in cell cycle progression and apoptosis, as well as canonical PI3K/Akt/NF-κB signaling pathways, were analyzed by qRT-PCR, immunoblotting and ELISA. Expression profiling of noncoding RNAs (ncRNAs) that influence PI3K/Akt/NF-κB signaling was undertaken. TUNEL assay was performed using flow cytometry. RESULTS Administration of snus induced basal cell hyperplasia in the rat forestomach with increased cell proliferation and inhibition of apoptosis. This was associated with the activation of PI3K/Akt/NFκB signaling. Coadministration of blueberries significantly suppressed snus-induced hyperplasia. Analysis of the molecular mechanisms revealed that blueberries suppress the phosphorylation of Akt, NF-κB and IKKβ, prevent nuclear translocation of NF-κB and modulate the expression of microRNAs that influence PI3K/Akt/NF-κB signaling. CONCLUSION Taken together, the results of the current study provide compelling evidence that blueberries exert significant protective effects against snus-induced soft tissue changes in the rat forestomach epithelium mediated by inhibiting key molecular players in the PI3K/Akt/NF-κB signaling axis. Long-term studies on the impact of snus exposure on various cellular processes, signaling pathways, and the interplay between genetic and epigenetic mechanisms are however warranted. The results of this investigation may contribute to the development of protection against soft tissue changes induced by smokeless tobacco in the human oral cavity.
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Affiliation(s)
- Singaraj Ranjani
- Department of Biochemistry and Biotechnology, Faculty of Science, Annamalai University, Annamalainagar-608 002, Tamil Nadu, India
| | - Jaganathan Kowshik
- Department of Biochemistry and Biotechnology, Faculty of Science, Annamalai University, Annamalainagar-608 002, Tamil Nadu, India
| | - Josephraj Sophia
- Department of Biochemistry and Biotechnology, Faculty of Science, Annamalai University, Annamalainagar-608 002, Tamil Nadu, India
| | - Ramesh Nivetha
- Department of Biochemistry and Biotechnology, Faculty of Science, Annamalai University, Annamalainagar-608 002, Tamil Nadu, India
| | - Abdul B Baba
- Department of Biochemistry and Biotechnology, Faculty of Science, Annamalai University, Annamalainagar-608 002, Tamil Nadu, India
| | - Veeran Veeravarmal
- Division of Oral and Maxillofacial Pathology, Rajah Muthiah Dental College and Hospital, Annamalai University, Annamalainagar-608 002, Tamil Nadu, India
| | - Gordana Joksić
- Vinca Institute of Nuclear Sciences, Laboratory for Physical Chemistry, University of Belgrade, Mike PetrovicaAlasa 12-14, Belgrade 11001, Serbia
| | | | - Robert Nilsson
- Vinca Institute of Nuclear Sciences, Laboratory for Physical Chemistry, University of Belgrade, Mike PetrovicaAlasa 12-14, Belgrade 11001, Serbia
| | - Siddavaram Nagini
- Department of Biochemistry and Biotechnology, Faculty of Science, Annamalai University, Annamalainagar-608 002, Tamil Nadu, India
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Kowshik J, Nivetha R, Ranjani S, Venkatesan P, Selvamuthukumar S, Veeravarmal V, Nagini S. Astaxanthin inhibits hallmarks of cancer by targeting the PI3K/NF‐κΒ/STAT3 signalling axis in oral squamous cell carcinoma models. IUBMB Life 2019; 71:1595-1610. [DOI: 10.1002/iub.2104] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2019] [Accepted: 05/27/2019] [Indexed: 12/24/2022]
Affiliation(s)
- Jaganathan Kowshik
- Department of Biochemistry and BiotechnologyFaculty of Science, Annamalai University Annamalainagar Tamil Nadu India
| | - Ramesh Nivetha
- Department of Biochemistry and BiotechnologyFaculty of Science, Annamalai University Annamalainagar Tamil Nadu India
| | - Singaraj Ranjani
- Department of Biochemistry and BiotechnologyFaculty of Science, Annamalai University Annamalainagar Tamil Nadu India
| | - Palanivel Venkatesan
- Department of PharmacyFaculty of Engineering & Technology, Annamalai University Annamalainagar Tamil Nadu India
| | - Subramanian Selvamuthukumar
- Department of PharmacyFaculty of Engineering & Technology, Annamalai University Annamalainagar Tamil Nadu India
| | - Veeran Veeravarmal
- Division of Oral and Maxillofacial PathologyRajah Muthiah Dental College and Hospital, Annamalai University Annamalainagar Tamil Nadu India
| | - Siddavaram Nagini
- Department of Biochemistry and BiotechnologyFaculty of Science, Annamalai University Annamalainagar Tamil Nadu India
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Kumar TA, Veeravarmal V, Nirmal RM, Amsaveni R, Nassar MHM, Kesavan G. Expression of Cluster of Differentiation 1a-Positive Langerhans Cells in Oral Lichen Planus. Indian J Dermatol 2019; 64:41-46. [PMID: 30745634 PMCID: PMC6340233 DOI: 10.4103/ijd.ijd_350_16] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Background/Purpose: Lichen planus is a T-cell-mediated mucocutaneous disorder characterized histopathologically by a band of chronic inflammatory cells in the subepithelial zone and degeneration of basal layer. The present study was aimed to evaluate the distribution and quantitative assessment of cluster of differentiation 1a (CD1a)-positive Langerhans cells (LCs) in oral lichen planus (OLP), thus to determine the role of LCs pertaining to the changes occurring in OLP. Materials and Methods: Five cases of normal oral mucosa and 20 cases of OLP were immunostained with CD1a antibody; the positive cells were counted manually in the photomicrographs and statistically analyzed using t-test, Mann–Whitney test, and Wilcoxon signed-rank test. Results: The average percentage of CD1a-positive LCs in normal subjects was 0.9%, and in the OLP cases higher percentage was observed (3.93%). The statistical comparison of these two parameters was significant (P=0.018). The degree of basal cell degeneration and density of subepithelial infiltrate on statistical comparison with the concentration of CD1a-positive LCs showed significant results. Conclusion: LCs play a pivotal role in the recruitment of CD4+ and CD8+ cells to the subepithelial region and basal keratinocytes apoptosis. A small number of study subjects, assessment of only CD1a molecule and LCs in the epidermis only were a few of the drawbacks of the study.
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Affiliation(s)
- Thankanadar Arul Kumar
- Department of Oral and Maxillofacial Pathology, Rajah Muthiah Dental College and Hospital, Annamalai University, Chidambaram, Tamil Nadu, India
| | - Veeran Veeravarmal
- Department of Oral and Maxillofacial Pathology, Rajah Muthiah Dental College and Hospital, Annamalai University, Chidambaram, Tamil Nadu, India
| | - Ramdas Madhavan Nirmal
- Department of Oral and Maxillofacial Pathology, Rajah Muthiah Dental College and Hospital, Annamalai University, Chidambaram, Tamil Nadu, India
| | - Ramamoorthy Amsaveni
- Department of Oral and Maxillofacial Pathology, Rajah Muthiah Dental College and Hospital, Annamalai University, Chidambaram, Tamil Nadu, India
| | - Mohamed Hanifa Mohamed Nassar
- Department of Oral and Maxillofacial Pathology, Rajah Muthiah Dental College and Hospital, Annamalai University, Chidambaram, Tamil Nadu, India
| | - Ganesan Kesavan
- Department of Oral Pathology, Madha Dental College and Hospital, Chennai, Tamil Nadu, India
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Krishnaraj J, Baba AB, Viswanathan P, Veeravarmal V, Balasubramanian V, Nagini S. Impact of stainless-steel welding fumes on proteins and non-coding RNAs regulating DNA damage response in the respiratory tract of Sprague-Dawley rats. J Toxicol Environ Health A 2018; 81:1231-1245. [PMID: 30507362 DOI: 10.1080/15287394.2018.1550027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Substantial evidence has established the negative impact of inhalation exposure to welding fumes on respiratory functions. The aim of the present study was to investigate the effect of welding fume inhalation on expression of molecules that function as sensors, transducers and effectors of DNA damage response (DDR) in the respiratory tract of male Sprague-Dawley rats. Animals were exposed to 50 mg/m3 stainless steel welding fumes for 1 h/d for 4, 8, and 12 weeks, respectively. Histological examination demonstrated preneoplastic changes in trachea and bronchi with focal atelectasis and accumulation of chromium (Cr) in the lungs. This was associated with elevated levels of DNA damage markers (8-oxodG, γH2AX), ATM phosphorylation, cell cycle arrest, apoptosis induction, activation of homologous recombination (HR), non-homologous end joining (NHEJ), and Nrf2 signaling, as well as altered expression of noncoding RNAs (ncRNAs). However, after 12 weeks of exposure, DDR was compromised as reflected by resumption of the cell cycle, repair inhibition, and failure of apoptosis. Data demonstrate that exposure to welding fumes influences two crucial layers of DDR regulation, phosphorylation of key proteins in NHEJ and HR, as well as the ncRNAs that epigenetically modulate DDR. Evidence indicates that marked DNA damage coupled with non-productive DNA repair and apoptosis avoidance may be involved in neoplastic transformation.
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Affiliation(s)
- Jayaraman Krishnaraj
- a Department of Biochemistry and Biotechnology, Faculty of Science , Annamalai University , Annamalainagar , TN , India
| | - Abdul Basit Baba
- a Department of Biochemistry and Biotechnology, Faculty of Science , Annamalai University , Annamalainagar , TN , India
| | - Periasamy Viswanathan
- b Division of Pathology, Rajah Muthiah Medical College & Hospital , Annamalai University , Annamalinagar , TN , India
| | - Veeran Veeravarmal
- c Division of Oral Pathology, Rajah Muthiah Dental College & Hospital , Annamalai University , Annamalinagar , TN , India
| | - Viswalingam Balasubramanian
- d Department of Manufacturing Engineering, Faculty of Engineering and Technology , Annamalai University , Annamalainagar , TN , India
| | - Siddavaram Nagini
- a Department of Biochemistry and Biotechnology, Faculty of Science , Annamalai University , Annamalainagar , TN , India
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Veeravarmal V, Austin RD, Nagini S, Nassar MHM. Expression of β1integrin in normal epithelium, oral submucous fibrosis and oral squamous cell carcinoma. Pathol Res Pract 2017; 214:273-280. [PMID: 29113685 DOI: 10.1016/j.prp.2017.10.013] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/24/2017] [Revised: 08/02/2017] [Accepted: 10/12/2017] [Indexed: 12/11/2022]
Abstract
INTRODUCTION AND AIMS The possible reason suggested for epithelial atrophy in oral submucous fibrosis (OSMF) is ischemia. Dysregulation in the epithelial proliferation and maturation is also thought to be a cause. The β1 integrin identifies the oral epithelial stem cells. The changes induced by the arecanut on these cells may result in epithelial alterations. The aim of this study is to evaluate the stem cells distribution and percentage by assessing the β1 integrin expression. MATERIALS AND METHODS The study included normal oral mucosa (15 cases) and disease group (97 cases). The disease group was further subdivided into early (29 cases), moderate (34 cases), advanced OSMF (18 cases) and oral squamous cell carcinoma(OSCC) associated with OSMF (16 cases). The tissues were stained for β1 integrin antibodies. The positive cells and staining intensities were analysed to determine the staining index, and statistically evaluated using KW test statistics. RESULTS β1 integrin was observed in retepegs region and the percentage of positive cells was 14%- 30% in the control. In OSMF, the β1 integrin positivity was observed in basal and suprabasal layers, and the percentage was ranged from 2%-71%. β1 integrin expression in OSCC was observed both in central and peripheral cells and ranged from 17%-85%. On comparison, the difference in staining index among normal, OSMF and carcinomas was significant at p<0.01. The stem cells percentage was increased both in OSMF and carcinomas. The non-dysplastic epithelium of OSMF with severe atrophy showed lowest percentage. It is inferred that absence of stem cells and proliferation may attribute for the atrophy.
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Affiliation(s)
- Veeran Veeravarmal
- Department of Oral and Maxillofacial Pathology, Rajah Muthaih Dental College and Hospital, Annamalai University, Annamalai Nagar, Chidhambaram, Tamil Nadu, India.
| | - Ravi David Austin
- Department of Oral Medicine and Radiology, Rajah Muthaih Dental College and Hospital, Annamalai University, Annamalai Nagar, Chidhambaram, Tamil Nadu, India.
| | - Siddavaram Nagini
- Department of Biochemistry and Bio-Technology, Annamalai University, Annamalai Nagar, India.
| | - Mohamed Hanifa Mohamed Nassar
- Department of Oral and Maxillofacial Pathology, Rajah Muthaih Dental College and Hospital, Annamalai University, Annamalai Nagar, Chidhambaram, Tamil Nadu, India.
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Vidyalakshmi S, Nirmal RM, Veeravarmal V, Santhadevy A, Aravindhan R, Sumathy. Buccal Micronuclei Assay as a Tool For Biomonitoring DNA Damage in Oral Lichen Planus. J Clin Diagn Res 2016; 10:ZC05-7. [PMID: 27630941 DOI: 10.7860/jcdr/2016/17074.8072] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2015] [Accepted: 02/01/2016] [Indexed: 11/24/2022]
Abstract
INTRODUCTION The malignant transformation rate of Oral Lichen Planus (OLP) is between 0% and 5.8%. Oral lesions of lichen planus clinically presents itself multifocally, simulating the process of field cancerization in high risk malignancies. The Buccal MicroNucleus Cytome Assay (BMN Assay) provides a platform to identify the high risk individuals by evaluating the markers of nuclear damage at an earliest micro invasive phase. AIM To evaluate DNA damage in exfoliated buccal mucosal cells in individuals with oral lichen planus lesions and thereby to delineate the high risk group. MATERIALS AND METHODS Buccal smears from 22 OLP and 10 control samples were stained in modified Feulgen-Rossenback reaction for micronuclei assay. Cytological evaluation of number of MicroNucleated cells (CMN), Total Number of Micronuclei (TMN) in micronucleated cells was done in both groups. RESULTS Frequency of micronucleated cells (CMN) when compared among the study and control group, a mean value of 4.27 ± 1.80 and 0.90 ± 0.88 were obtained respectively. On comparing the total number of micronuclei in the micronucleated cells (TMN) between the study and control groups, a mean value of 5.38 ± 2.42 and 1.5 ± 0.88 were obtained respectively. CONCLUSION There was a significant increase in the frequency of micronuclei and the micronucleated cells in the oral lichen planus as compared to normal individuals.
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Affiliation(s)
- S Vidyalakshmi
- Senior Lecturer, Department of Oral and Maxillofacial Pathology, Indira Gandhi Institute of Dental Sciences , Pillaiyarkuppam, Pondicherry, India
| | - R Madhavan Nirmal
- Professor, Department of Oral and Maxillofacial Pathology, Rajah Muthiah Dental College and Hospital, Annamalai University , Chidambaram, India
| | - V Veeravarmal
- Professor, Department of Oral and Maxillofacial Pathology, Rajah Muthiah Dental College and Hospital, Annamalai University , Chidambaram, India
| | - A Santhadevy
- Professor, Department of Oral and Maxillofacial Pathology, Indira Gandhi Institute of Dental Sciences , Pillaiyarkuppam, Pondicherry, India
| | - R Aravindhan
- Senior Lecturer, Department of Oral and Maxillofacial Pathology, SRM Kattankulathur Dental College & Hospital, SRM University , Potheri, Kanchipuram dt, India
| | - Sumathy
- Professor, Private Practioner, Pondicherry, India
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Veeravarmal V, Austin RD, Siddavaram N, Thiruneelakandan S, Nassar MHM. Caspase-3 expression in normal oral epithelium, oral submucous fibrosis and oral squamous cell carcinoma. J Oral Maxillofac Pathol 2016; 20:445-452. [PMID: 27721610 PMCID: PMC5051293 DOI: 10.4103/0973-029x.190947] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
Context: The epithelium atrophy, as the oral submucous fibrosis (OSMF) progresses, is believed to be an after effect of stromal fibrosis, hyalinization, decrease in vascularity and cellularity and is considered as “ischemic atrophy.” Due to hypoxia, caspase-3 get activation and subsequent decrease in viable cell count can occur. Aims and Objectives: To determine caspase-3 expression in various grades of OSMF and oral squamous cell carcinoma (OSCC) to find out whether upregulation of apoptosis is responsible for the epithelial changes in OSMF. Subjects and Methods: The control tissue (15 samples from normal oral mucosa) and study group comprising 97 cases of OSMF of different grades and OSCC associated with OSMF were stained with caspase-3 antibody, and the percentage of positive cells was calculated using ImageJ software. Statistical Analysis: The results obtained were statistically analyzed using ANOVA and Tukey's honest significance difference test and Mann–Whitney U-test. Results: There was a nuclear expression of caspase-3 in basal and parabasal layers of normal epithelium. There was cytoplasmic expression of caspase-3 in OSMF without dysplasia, total absence of caspase-3 expression in dysplastic epithelium and in majority cases of OSCC. The caspase-3 percentage was increased in OSMF (0%–53%) when compared with OSCC (0%–8%). The statistical comparison of caspase-3 among normal, OSMF and OSCC patients revealed significant correlation (P < 0.00010). The comparison within different grades of OSMF and between dysplastic and nondysplastic epithelium OSMF also showed significance (P < 0.019). Conclusions: The decreased expression of caspase-3 in disease progression reflects its role in the malignant transformation.
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Affiliation(s)
- Veeran Veeravarmal
- Division of Oral and Maxillofacial Pathology, Rajah Muthiah Dental College and Hospital, Annamalai University, Chidambaram, Tamil Nadu, India
| | - Ravi David Austin
- Division of Oral Medicine and Radiology, Rajah Muthiah Dental College and Hospital, Annamalai University, Chidambaram, Tamil Nadu, India
| | - Nagini Siddavaram
- Department of Biochemistry and Biotechnology, Annamalai University, Chidambaram, Tamil Nadu, India
| | - Sambanthan Thiruneelakandan
- Division of Oral and Maxillofacial Surgery, Rajah Muthiah Dental College and Hospital, Annamalai University, Chidambaram, Tamil Nadu, India
| | - Mohamed Hanifa Mohamed Nassar
- Division of Oral Medicine and Radiology, Rajah Muthiah Dental College and Hospital, Annamalai University, Chidambaram, Tamil Nadu, India
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Abstract
Reactive proliferations of the gingiva comprise lesions such as pyogenic granuloma (PG), inflammatory fibroepithelial hyperplasia (IFH), peripheral ossifying fibroma (POF), and peripheral giant cell lesion. Osteopontin (OPN) has a dual role, it promotes mineralization when it is bound to solid substrate, and on the other hand, it inhibits mineralization when it is seen in association with solution. Objectives The study aimed to evaluate the expression of osteopontin in normal gingival tissue and different types of focal reactive proliferations of gingival tissue, and its role in the development of calcification within it. Material and Methods The presence and distribution of osteopontin was assessed using immunohistochemistry in five cases of normal gingival tissue and 30 cases of focal reactive proliferations of gingiva. Results There was no expression of osteopontin in normal subjects. Few cases of pyogenic granuloma, inflammatory fibroepithelial hyperplasia, and all the cases of peripheral ossifying fibroma showed positivity for osteopontin in the inflammatory cells, stromal cells, extracellular matrix, and in the calcifications. Conclusion The expression of osteopontin in all the cases of peripheral ossifying fibroma speculates that the majority of the cases of peripheral ossifying fibroma originate from the periodontal ligament cells. The treatment modalities for peripheral ossifying fibroma should differ from other focal reactive proliferations of gingiva.
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Affiliation(s)
- Rathinam Elanagai
- Division of Oral and Maxillofacial Pathology, Rajah Muthaiah Dental College and Hospital, Annamalai University, Annamalai Nagar, India
| | - Veeran Veeravarmal
- Division of Oral and Maxillofacial Pathology, Rajah Muthaiah Dental College and Hospital, Annamalai University, Annamalai Nagar, India
| | - Ramdas Madhavan Nirmal
- Division of Oral and Maxillofacial Pathology, Rajah Muthaiah Dental College and Hospital, Annamalai University, Annamalai Nagar, India
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Ganesan K, Nirmal RM, Nassar MM, Veeravarmal V, Amsaveni R, Kumar A. Evaluation of myofibroblasts in oral squamous cell carcinoma using H1 calponin: An immunohistochemical study. J Oral Maxillofac Pathol 2015; 19:42-6. [PMID: 26097306 PMCID: PMC4451667 DOI: 10.4103/0973-029x.157200] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2014] [Accepted: 04/17/2015] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND Oral squamous cell carcinoma (OSCC) is the most common malignancy of the oral mucosa. Stromal myofibroblasts play an important role in tumor invasion and metastasis, due to its ability to modify the extracellular matrix. The purpose of this study was to evaluate and compare the presence of myofibroblasts in normal mucosa, early invasive carcinoma and different grades of OSCC. MATERIALS AND METHODS The study included the archival tissues of 18 OSCC of well, moderate and poorly differentiated grades, three early invasive carcinomas and five normal mucosa. Myofibroblasts were identified by immunohistochemical detection of h1 calponin. RESULTS The percentage and intensity of h1 calponin were examined and positive immunostaining was observed in the myofibroblasts of all SCCs and early invasive carcinomas; however, these cells did not stain in the normal epithelium specimens. The presence of myofibroblasts was significantly higher in invasive pattern of OSCCs compared to normal mucosa cases (P < 0.070). A significant difference was not observed between the different grades of OSCC (P ≤ 0.812). CONCLUSION These findings show the presence of myofibroblasts in OSCC but not in normal mucosa, suggesting that the genetically altered epithelium (carcinomatous epithelium) may have an inductive effect on the adjacent stroma to produce myofibroblasts. Also transdifferentiation of myofibroblasts is induced somewhere in the invasive stage of SCC irrespective of the epithelial cell differentiation.
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Affiliation(s)
- Kesavan Ganesan
- Department of Oral Pathology, Madha Dental College and Hospital, Chennai, India
| | - R Madhavan Nirmal
- Department of Oral Pathology, Rajah Muthiah Dental College and Hospital, Chidambaram, Tamil Nadu, India
| | - M Mohamed Nassar
- Department of Oral Pathology, Rajah Muthiah Dental College and Hospital, Chidambaram, Tamil Nadu, India
| | - V Veeravarmal
- Department of Oral Pathology, Rajah Muthiah Dental College and Hospital, Chidambaram, Tamil Nadu, India
| | - R Amsaveni
- Department of Oral Pathology, Rajah Muthiah Dental College and Hospital, Chidambaram, Tamil Nadu, India
| | - Arul Kumar
- Department of Oral Pathology, Rajah Muthiah Dental College and Hospital, Chidambaram, Tamil Nadu, India
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Chitturi RT, Veeravarmal V, Nirmal RM, Reddy BVR. Myoepithelial Cells (MEC) of the Salivary Glands in Health and Tumours. J Clin Diagn Res 2015; 9:ZE14-8. [PMID: 25954719 DOI: 10.7860/jcdr/2015/11372.5707] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2014] [Accepted: 02/08/2015] [Indexed: 01/05/2023]
Abstract
Myoepithelial cells (MEC) are found in the secretory units of many mammalian exocrine glands such as mammary, sweat, lacrimal and salivary glands. They are interposed between the secretory cells and the basal lamina. Immunohistochemically they are found to contain keratin intermediate filaments and are, therefore, considered to have an epithelial origin but at the same time they contain a large number of myofilaments which represent a massive expression of contractile proteins such as actin, myosin, calponin and caldesmon. Thus have smooth muscle like property also and hence the name. Numerous functions of MEC have been described, the most important of them being important for contraction of the glands and recently it has been found to prevent tumour progression. It should be noted that the diversity in the occurrence and dilemma regarding the pathogenesis of salivary gland tumours is due to lack in uniformity regarding the cells participating in its oncogenesis, especially the MEC. Also proper and extensive studies regarding MEC are very limited and thus have posed difficulty for a pathologist to understand this cell. In this review we try to bring about a thorough description of this cell in both physiological and pathological aspects.
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Affiliation(s)
- Ravi Teja Chitturi
- Senior Lecturer, Department of Oral Pathology, SIBAR Institute of Dental Sciences , Guntur, Andhra Pradesh, India
| | - V Veeravarmal
- Professor, Department of Oral Pathology, Rajah Muthiah Dental College and Hospital , Annamalai Nagar, Tamil Nadu, India
| | - R Madhavan Nirmal
- Professor and HOD, Department of Oral Pathology, Rajah Muthiah Dental College and Hospital , Annamalai Nagar, Tamil Nadu, India
| | - B Venkat Ramana Reddy
- Professor and HOD, Department of Oral Pathology, SIBAR Institute of Dental Sciences , Guntur, Andhra Pradesh, India
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Swetha P, Ramesh K, Madhavan N, Veeravarmal V, Sameera A. Expression of inducible nitric oxide synthase in the epithelial linings of odontogenic keratocyst, dentigerous cyst and radicular cyst: a pathological insight. Ann Med Health Sci Res 2014; 4:583-9. [PMID: 25221709 PMCID: PMC4160685 DOI: 10.4103/2141-9248.139330] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
BACKGROUND The present study is aimed at analyzing the expression of inducible nitric oxide synthase (iNOS) in the epithelial lining of odontogenic keratocyst (OKC), dentigerous cyst (DC), radicular cyst (RC) in order to understand the possible role of iNOS with special reference to its neoplastic nature and local aggressive of cysts. AIM The primary aim of the following study is to analyze the immunohistochemical expression of iNOS and secondary aim is to compare the iNOS expression, pattern and intensity of staining among the epithelial linings of OKC, DC and RC. MATERIALS AND METHODS iNOS in the epithelial lining cells were analyzing in 10 OKC's, 10 DC's and 10 RC's using immunohistochemistry. The percentage of positive cells was assessed and presented as mean ± standard deviation. The correlation with respect to the intensity and percentage of staining within the epithelial linings of OKCs, DCs and RCs was carried out using (analysis of variance and Student's t-test) Chi-square test. RESULTS Staining intensity of iNOS portion was seen in the entire thickness of the epithelial linings of OKC, whereas in DC's only one case had entire thickness of the epithelial lining staining and in RC's none of the cases showed entire thickness of staining. On comparing the staining intensity of iNOS between OKC, DC and RC groups, using Chi-square test, there was a statistically significant difference between these groups (P < 0.01). On analyzing the immuno-reactivity of iNOS in OKC, DC and RC there was a positive variable expression iNOS between the cysts. CONCLUSION iNOS was over expressed in OKCs when compared with DC and RC suggesting that iNOS may contribute to the aggressive behavior of OKC. This is yet another evidence to support that OKC is the neoplasm.
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Affiliation(s)
- P Swetha
- Department of Oral and Maxillofacial Pathology, Vishnu Dental College, Bhimavaram, Andhra Pradesh, India
| | - Ksv Ramesh
- Department of Periodontics, Vishnu Dental College, Bhimavaram, Andhra Pradesh, India
| | - N Madhavan
- Rajah Muthaiah Dental College and Hospital, Annamalai University, Chidambaram, Tamil Nadu, India
| | - V Veeravarmal
- Rajah Muthaiah Dental College and Hospital, Annamalai University, Chidambaram, Tamil Nadu, India
| | - Ass Sameera
- Department of Oral Medicine, C. K. S. Dental College, Tirupati, Andhra Pradesh, India
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Abstract
The central odontogenic fibroma (COF) is a rare benign odontogenic mesenchymal tumor of jaw bones. The World Health Organization (WHO) recognizes two variants of COF namely: 1) Epithelial-rich type (WHO) and 2) epithelial-poor type (simple type). Rare variants like ossifying COF, COF associated with giant cell lesions, and amyloid have been documented. This article presents a case of an epithelial-rich variant of COF in a 24-year-old female. It presented as a bony swelling of the maxilla and appeared as a mixed lesion in radiographs. Histopathology showed a highly cellular fibrous connective tissue stroma with plump fibroblasts and long strands of odontogenic epithelium exhibiting mild eosinophilic to clear cytoplasm. Numerous cementum-like hematoxyphilic calcifications of various sizes akin to dentin or acellular cementum were observed. We believe that clinical and radiographic features of this case may add valuable knowledge to the already existing literature.
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Affiliation(s)
- V Veeravarmal
- Division of Oral and Maxillofacial Pathology, Rajah Muthaih Dental College and Hospital, Annamalai University, Tamil Nadu, India
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Nagini S, Priyadarsini RV, Veeravarmal V, Mishra R. Erratum to: Chlorophyllin abrogates canonical Wnt/β-catenin signaling and angiogenesis to inhibit the development of DMBA-induced hamster cheek pouch carcinomas. Cell Oncol 2013. [DOI: 10.1007/s13402-012-0121-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
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Nagini S, Siddavaram N, Vidya Priyadarsini R, Ramamurthi VP, Veeravarmal V, Veeran V, Mishra R. Chlorophyllin abrogates canonical Wnt/β-catenin signaling and angiogenesis to inhibit the development of DMBA-induced hamster cheek pouch carcinomas. Cell Oncol (Dordr) 2012; 35:385-95. [PMID: 22983718 DOI: 10.1007/s13402-012-0099-z] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/09/2012] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND Chlorophyllin, a water soluble semi-synthetic food-grade derivative is reported to exhibit a wide range of beneficial health effects. We investigated the effect of chlorophyllin supplementation on Wnt/β-catenin and vascular endothelial growth factor (VEGF) signaling in the 7,12-dimethylbenz[a]anthracene (DMBA)-induced hamster buccal pouch (HBP) carcinogenesis model. METHODS AND RESULTS Hamsters were divided into 4 groups. The right buccal pouches of group 1 and 2 hamsters were painted with 0.5 % DMBA for 14 weeks. Group 2 animals received in addition chlorophyllin (4 mg/kg bw) in the diet. Group 3 animals received chlorophyllin alone and group 4 animals served as control. mRNA and protein expression of components of Wnt, VEGF, and PI3K/Akt signaling pathways were analyzed by RT-PCR and Western blot analysis. Dietary chlorophyllin administration suppressed the development of HBP carcinomas by altering the expression of several components of the Wnt/β-catenin signaling pathway. This was associated with inhibition of angiogenesis as evidenced by decreased expression of the proangiogenic factors HIF-1α, VEGF, and VEGFR2. Chlorophyllin administration also downregulated the expression of histone deacetylases involved in epigenetic regulation of tumor angiogenesis. CONCLUSION Dietary chlorophyllin that abrogates Wnt/β-catenin and VEGF signaling by targeting a multitude of key signaling molecules is an attractive candidate for preventing tumor progression.
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Affiliation(s)
- Siddavaram Nagini
- Department of Biochemistry and Biotechnology, Faculty of Science, Annamalai University, Annamalainagar, 608 002, Tamil Nadu, India.
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Madhavan Nirmal R, Veeravarmal V, Santha Devy A, Ramachandran CR. Unusual presentation of nasopharyngeal (juvenile) angiofibroma in a 45 year old female. Indian J Dent Res 2004; 15:145-8. [PMID: 16035644] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/03/2023] Open
Abstract
Juvenile nasopharyngeal angiofibroma is a rare tumour, comprising 0.05% of the head and neck tumours, histologically benign, locally invasive, and has a specific predilection for nasopharynx and adolescent males. This article presents an unusual case of nasopharyngeal angiofibroma in a 45-year-old female patient, manifesting as a destructive maxillary lesion and discusses the two most important factors regarding this tumour, the etio-pathogenesis and spread.
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Affiliation(s)
- R Madhavan Nirmal
- Department of Oral & Maxillofacial Pathology, Rajah Muthiah Dental College & Hospital, Annamalai Nagar.
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