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https://www.readbyqxmd.com/read/29769506/evaluating-the-role-of-immunological-cells-tissue-eosinophils-and-mast-cells-in-progression-of-oral-squamous-cell-carcinoma
#1
S Saxena, A Singh, P Singh, K S Sundaragiri, B Sankhla, A Bhargava
Mast cells and eosinophils are increased in oral squamous cell carcinoma. The significance of such an association has been variably thought to be either a potential diagnostic tool for stromal invasion or as a prognostic indicator. The aim of the study was to study the mast cells and eosinophils between normal oral mucosa, leukoplakia and oral squamous cell carcinoma and to study the significance of mast cells in the progression of the lesion. A retrospective study was done on archival tissue received from January 2015 to December 2015, in the Department of Oral Pathology, RUHS College of Dental Sciences, Jaipur, Rajasthan, India...
April 2018: Mymensingh Medical Journal: MMJ
https://www.readbyqxmd.com/read/29763881/orally-administered-brown-seaweed-derived-%C3%AE-glucan-effectively-restrained-development-of-gastric-dysplasia-in-a4gnt-ko-mice-that-spontaneously-develop-gastric-adenocarcinoma
#2
Mark Joseph Desamero, Shigeru Kakuta, James Kenn Chambers, Kazuyuki Uchida, Satoshi Hachimura, Masaya Takamoto, Jun Nakayama, Hiroyuki Nakayama, Shigeru Kyuwa
β-Glucan refers to a heterogeneous group of chemically defined storage polysaccharides containing β-(1,3)-d-linked glucose polymers with branches connected by either β-(1,4) or β-(1,6) glycosidic linkage. To date, an extensive amount of scientific evidence supports their multifunctional biological activities, but their potential involvement in the progression of premalignant lesions remains to be clarified. A4gnt KO mice that lack α1,4-N-acetylglucosamine-capped O-glycans in gastric gland mucin are a unique animal model for gastric cancer because the mutant mice spontaneously develop gastric cancer through hyperplasia-dysplasia-adenocarcinoma sequence...
May 12, 2018: International Immunopharmacology
https://www.readbyqxmd.com/read/29752448/regulation-of-proliferation-and-cell-cycle-by-protein-regulator-of-cytokinesis-1-in-oral-squamous-cell-carcinoma
#3
Fanglong Wu, Xueke Shi, Rui Zhang, Yuan Tian, Xiangjian Wang, Changlei Wei, Duo Li, Xiaoyu Li, Xiangli Kong, Yurong Liu, Weihua Guo, Yiqing Guo, Hongmei Zhou
Protein regulator of cytokinesis 1 (PRC1), a microtubule-associated protein, has emerged as a critical regulator of proliferation and apoptosis, acting predominantly in numerous tumors. However, its function in oral squamous cell carcinoma (OSCC) is still unknown. To establish the roles of PRC1 in OSCC, 95 oral clinical samples (54 OSCC, 24 oral leukoplakia [OLK], and 17 normal oral mucosa) and seven oral cell lines (6 OSCC and 1 normal oral cell lines) were analyzed using a series of molecular and genomic assays both in vivo and in vitro were conducted in this study...
May 11, 2018: Cell Death & Disease
https://www.readbyqxmd.com/read/29751770/systemically-administered-allogeneic-mesenchymal-stem-cells-do-not-aggravate-the-progression-of-precancerous-lesions-a-new-biosafety-insight
#4
Flavia Bruna, Anita Plaza, Martha Arango, Iris Espinoza, Paulette Conget
BACKGROUND: Mesenchymal stem cells (MSCs) are a heterogeneous subset of stromal cells currently tested for multiple therapeutic purposes. Their potential to home into tumors, to secrete trophic/vasculogenic factors, and to suppress immune response raises questions regarding their biosafety. Our aim was to evaluate whether systemically administered allogeneic MSCs modify the natural progression of precancerous lesions and whether their putative effect depends on cancer stage and/or cell dose...
May 11, 2018: Stem Cell Research & Therapy
https://www.readbyqxmd.com/read/29750890/impact-of-age-on-disease-progression-and-microenvironment-in-oral-cancer
#5
V K Vincent-Chong, H DeJong, L J Rich, A Patti, M Merzianu, P A Hershberger, M Seshadri
Despite the recognized link between aging and cancer, most preclinical studies in experimental tumor models are conducted with 6- to 8-wk-old rodents. The goal of the present study was to examine the impact of age on tumor incidence, growth, and microenvironmental characteristics in mouse models of head and neck squamous cell carcinoma (HNSCC). Experimental studies were conducted with the 4-nitroquinoline-oxide (4NQO) oral carcinogenesis model and orthotopic FaDu HNSCC xenografts, established in young (7 to 12 wk of age) and old (65 to 70 wk of age) female C57BL/6 mice ( n = 44; 4NQO model) and severe combined immunodeficient mice ( n = 13; HNSCC xenografts)...
May 1, 2018: Journal of Dental Research
https://www.readbyqxmd.com/read/29731555/coalition-of-e-cadherin-and-vascular-endothelial-growth-factor-expression-in-predicting-malignant-transformation-in-common-oral-potentially-malignant-disorders
#6
P Sharada, Uma Swaminathan, B R Nagamalini, K Vinod Kumar, B K Ashwini, Vln Lavanya
Background: Reduced E-cadherin expression and increased VEGF expression is known to be involved in tissue growth and transformation of Oral Potentially Malignant Disorders (OPMDs) and has been correlated with their differing histological grades in numerous studies. Aim: To evaluate Immunohistochemical (IHC) expression of both E-cadherin and VEGF in predicting the malignant transformation potential of common OPMDs. Materials and Methods: Ten cases each of Normal Oral mucosa (NOM), Mild Oral Epithelial Dysplasia (OED), Moderate OED, Severe OED, Oral Submucous Fibrosis, (OSMF) and Oral Squamous Cell Carcinoma (OSCC) were stained and evaluated for the expression of Ecadherin and VEGF...
January 2018: Journal of Oral and Maxillofacial Pathology: JOMFP
https://www.readbyqxmd.com/read/29725529/non-invasive-imaging-of-actinic-cheilitis-and-squamous-cell-carcinoma-of-the-lip
#7
Mihai Lupu, Ana Caruntu, Constantin Caruntu, Daniel Boda, Liliana Moraru, Vlad Voiculescu, Alexandra Bastian
An early diagnosis is of overwhelming importance for the management and prognosis of mucocutaneous cancer. Actinic cheilitis (AC), defined by the clonal expansion of genomically unstable keratinocytes, is the most common potentially malignant lesion affecting the lips. Squamous cell carcinoma (SCC) is the most frequent oral malignancy, and there is strong evidence that the majority of the SCCs of the lip originate from AC. There is considerable difficulty in discerning between dysplasia and invasive carcinomas solely on a clinical basis...
May 2018: Molecular and Clinical Oncology
https://www.readbyqxmd.com/read/29709496/molecular-markers-associated-with-development-and-progression-of-potentially-premalignant-oral-epithelial-lesions-current-knowledge-and-future-implications
#8
REVIEW
Nikolaos G Nikitakis, Monica Pentenero, Maria Georgaki, Catherine F Poh, Douglas E Peterson, Paul Edwards, Mark Lingen, John J Sauk
Identification and management of potentially premalignant oral epithelial lesions (PPOELs) at highest risk of malignant transformation holds great promise for successful secondary prevention of oral squamous cell carcinoma, potentially reducing oral cancer morbidity and mortality. However, to date, neither clinical nor histopathologic validated risk predictors that can reliably predict which PPOELs will definitively progress to malignancy have been identified. In addition, the management of PPOELs remains a major challenge...
April 4, 2018: Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology
https://www.readbyqxmd.com/read/29705090/alterations-in-the-expression-of-dna-damage-response-related-molecules-in-potentially-preneoplastic-oral-epithelial-lesions
#9
Nikolaos G Nikitakis, George Z Rassidakis, Jason Tasoulas, Ioannis Gkouveris, Georgios Kamperos, Argyrios Daskalopoulos, Alexandra Sklavounou
OBJECTIVES: The aim of this study was to evaluate the expression levels of DNA damage response (DDR) markers in potentially preneoplastic oral epithelial lesions (PPOELs). STUDY DESIGN: Immunohistochemical expression of DDR markers (γΗ2 ΑΧ, pChk2, 53 BP1, p53, and phosphorylated at Ser 15 p53) was assessed in 41 oral leukoplakias, ranging from hyperplasia (H) to dysplasia (D) and in comparison with oral squamous cell carcinoma (OSCC) and normal mucosa (NM). Statistical and receiver operating characteristic curve analysis were performed...
March 22, 2018: Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology
https://www.readbyqxmd.com/read/29687243/endorsing-cellular-competitiveness-in-aberrant-epithelium-of-oral-submucous-fibrosis-progression-neighbourhood-analysis-of-immunohistochemical-attributes
#10
Anji Anura, Anees Kazi, Mousumi Pal, Ranjan Rashmi Paul, Sanghamitra Sengupta, Jyotirmoy Chatterjee
Epithelial abnormality during the transformation of oral submucous fibrosis (OSF) into oral squamous cell carcinoma has been well studied and documented. However, the differential contribution of atrophy and hyperplasia for malignant potentiality of OSF is yet to be resolved. Existing diagnostic conjectures lack precise diagnostic attributes which may be effectively resolved by substantiation of specific molecular pathology signatures. Present study elucidates existence of cellular competitiveness in OSF conditions using computer-assisted neighbourhood analysis in quantitative immunohistochemistry (IHC) framework...
April 23, 2018: Histochemistry and Cell Biology
https://www.readbyqxmd.com/read/29675295/combination-of-structural-and-vascular-optical-coherence-tomography-for-differentiating-oral-lesions-of-mice-in-different-carcinogenesis-stages
#11
Ping-Hisen Chen, Chien-Hsien Wu, Yi-Fen Chen, Yi-Chen Yeh, Bo-Han Lin, Kuo-Wei Chang, Pei-Yu Lai, Ming-Chih Hou, Ching-Liang Lu, Wen-Chuan Kuo
Differentiating between early malignancy and benign lesions in oral cavities is difficult using current optical tools. As has been shown in previous studies, microvascular changes in squamous epithelium can be regarded as a key marker for diagnosis. We propose the combination of structural and vascular optical coherence tomography (OCT) imaging for the investigation of disease related changes. Progressive thickness changes of epithelium and the destruction of underlying lamina propria was observed during cancer development in a 4- nitroquinoline-1-oxide (4NQO) mouse model...
April 1, 2018: Biomedical Optics Express
https://www.readbyqxmd.com/read/29661732/mcm-2-expression-differentiates-potentially-malignant-verrucous-lesions-from-oral-carcinomas
#12
Kochli Channappa Niranjan, Niharika Abhay Sarathy, Devendra Alrani
BACKGROUND: Mcm-2 is a biomarker belonging to Mcm family of proteins which has rarely been used in oral potentially malignant and malignant lesions of the verrucous type. The objective of this study is to assess the expression of Mcm-2 in Normal Oral Mucosa (NM), Verrucous Hyperplasia (VH), Verrucous Carcinoma (VC) and Oral Squamous Cell Carcinoma (OSCC) and compare it with the clinicopathological characteristics. METHODOLOGY: A total of 70 formalin fixed paraffin embedded tissue samples (10 cases of Normal Mucosa NM- Group A, 10 cases of Verrucous Hyperplasia- VH without Dysplasia- Group B, 10 cases of Verrucous Hyperplasia- VH with Dysplasia- Group C, 20 cases of Verrucous Carcinoma VC-Group D, 20 cases of Oral Squamous Cell Carcinoma OSCC- Group E) were subjected to immunohistochemistry with Mcm-2 antibody...
March 13, 2018: Annals of Diagnostic Pathology
https://www.readbyqxmd.com/read/29620248/expression-and-oncogenic-properties-of-membranous-notch1-in-oral-leukoplakia-and-oral-squamous-cell-carcinoma
#13
Xu Ding, Yang Zheng, Zhao Wang, Wei Zhang, Yibo Dong, Wantao Chen, Jiang Li, Weiming Chu, Wei Zhang, Yi Zhong, Li Mao, Xiaomeng Song, Yunong Wu
Notch1 signaling is essential for tissue development and tumor progression. This signaling pathway has also been implicated in oral leukoplakia (OL) and oral squamous cell carcinoma (OSCC). However, the role of Notch1 expression in OL and its malignant transformation is unknown. This study aimed to examine the Notch1 expression patterns by immunohistochemistry (IHC) in a cohort of 78 Chinese patients with OL and to analyze the relationship between the patterns and progression of OL to OSCC. Strong Notch1 staining was observed in 10 (13%) of the 78 OL patients, but it was not associated with any of the clinicopathological parameters...
March 27, 2018: Oncology Reports
https://www.readbyqxmd.com/read/29606637/oral-epithelial-dysplasia-atypical-verrucous-lesions-and-oral-potentially-malignant-disorders-focus-on-histopathology
#14
REVIEW
Susan Müller
The term oral potentially malignant disorders (OPMDs) describes a recognizable group of mucosal diseases that have a risk of progressing to squamous cell carcinoma. Oral leukoplakia, the most common OPMD, has a 1% prevalence and reported malignant transformation rates of 2% to 5%. Other OPMDs include erythroplakia, erythroleukoplakia, submucous fibrosis, lesions of reverse smokers, and inherited genetic disorders, such as Fanconi anemia. The histopathologic assessment of OPMDs is an area of subjectivity, and oral epithelial dysplasia (OED) is fraught with both interrater variability and intrarater variability...
March 1, 2018: Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology
https://www.readbyqxmd.com/read/29603824/expression-of-protein-arginine-methyltransferase-5-in-oral-squamous-cell-carcinoma-and-its-significance-in-epithelial-to-mesenchymal-transition
#15
Yusuke Amano, Daisuke Matsubara, Taichiro Yoshimoto, Tomoko Tamura, Hiroshi Nishino, Yoshiyuki Mori, Toshiro Niki
Protein arginine methyltransferases (PRMT) 5, a member of type II arginine methyltransferases, catalyzes the symmetrical dimethylation of arginine residues on histone and non-histone substrates. Although the overexpression of PRMT5 has been reported in various cancers, its role in oral squamous cell carcinoma (OSCC) has not been elucidated. In the present study, we immunohistochemically examined the expression of PRMT5 in surgically resected oral epithelial dysplasia (OED, n = 8), oral intraepithelial neoplasia (OIN)/carcinoma in situ (CIS) (n = 11) and OSCC (n = 52) with or without contiguous OED lesions...
March 30, 2018: Pathology International
https://www.readbyqxmd.com/read/29559516/immunomodulatory-effects-of-momordica-charantia-extract-in-the-prevention-of-oral-cancer
#16
EDITORIAL
Chinthalapally V Rao
In recent times, bitter melon extract (BME) has gained significant attention for its anticancer efficacy against various malignancies. In this issue, Sur and colleagues show that BME prevents the development of 4-nitronitroquinoline 1-oxide-induced oral dysplasia and squamous cell carcinoma (SCC) in an immunocompetent mouse model. Importantly, gene ontology and pathway analyses revealed an elevated expression of s100a9, IL23a, IL1β, and PDCD1/PD1 of immune system during oral cancer development, which was significantly suppressed by BME...
March 20, 2018: Cancer Prevention Research
https://www.readbyqxmd.com/read/29550080/expression-of-cyclin-d1-correlates-with-p27-kip1-and-regulates-the-degree-of-oral-dysplasia-and-squamous-cell-carcinoma-differentiation
#17
Guangzhao Guan, Mahmoud M Bakr, Norman Firth, Robert M Love
OBJECTIVES: The aim of this study was to identify an association or link between cyclin D1 and p27KIP1 protein expression and dysplastic changes or progression. STUDY DESIGN: Oral mucosal biopsies with a diagnosis of non-neoplastic tissue (gingivitis) (n = 10), mild to moderate oral epithelial dysplasia (n = 12), and oral squamous cell carcinoma (n = 11) were evaluated by using immunohistochemistry. Scanning software was used to determine cyclin D1 and p27KIP1 intensity of expression, location, and pattern...
February 1, 2018: Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology
https://www.readbyqxmd.com/read/29496039/characterization-of-epithelial-oral-dysplasia-in-non-smokers-first-steps-towards-precision-medicine
#18
L D Rock, M P Rosin, L Zhang, B Chan, B Shariati, D M Laronde
OBJECTIVES: Tobacco usage is the strongest risk factor in the development of oral squamous cell carcinoma (OSCC), which mandates careful screening for oral cancers in smokers. However, there are indications that oral potentially malignant lesions, such as oral epithelial dysplasia (OED), in non-smokers (NS) have a higher cancer risk than those in smokers. Without tobacco as an etiology, the development of these lesions in NS may suggest genetic susceptibility. The increasing incidence of OSCC in NS calls for a better understanding of the natural history of OED in NS as compared to that of smokers...
March 2018: Oral Oncology
https://www.readbyqxmd.com/read/29399192/comparison-of-the-expression-of-tgf-%C3%AE-1-e-cadherin-n-cadherin-tp53-rb1cc1-and-hif-1%C3%AE-in-oral-squamous-cell-carcinoma-and-lymph-node-metastases-of-humans-and-mice
#19
Mengzhu Guo, Yun Mu, Dahai Yu, Jing Li, Fengqiang Chen, Baosheng Wei, Shichang Bi, Jia Yu, Feixin Liang
The aim of the present study was to prove that a mouse model closely simulates human oral cancer progression by comparing the expression levels of transforming growth factor (TGF)-β1, E-cadherin, N-cadherin, tumor protein (TP)53, RB1 inducible coiled-coil (RB1CC)1 and hypoxia inducible factor (HIF)-1α at different stages of oral squamous cell carcinoma (OSCC) in humans and mice. The expression levels of TGF-β1, E-cadherin, N-cadherin, TP53, RB1CC1, and HIF-1α were detected by immunohistochemical staining in normal oral mucosa, oral mucosa dysplasia, OSCC primary tumor and carcinoma tissues from lymph node metastases...
February 2018: Oncology Letters
https://www.readbyqxmd.com/read/29396319/oral-potentially-malignant-disorders-risk-of-progression-to-malignancy
#20
REVIEW
Paul M Speight, Syed Ali Khurram, Omar Kujan
Oral potentially malignant disorders (OPMDs) have a statistically increased risk of progressing to cancer, but the risk varies according to a range of patient- or lesion-related factors. It is difficult to predict the risk of progression in any individual patient, and the clinician must make a judgment based on assessment of each case. The most commonly encountered OPMD is leukoplakia, but others, including lichen planus, oral submucous fibrosis, and erythroplakia, may also be seen. Factors associated with an increased risk of malignant transformation include sex; site and type of lesion; habits, such as smoking and alcohol consumption; and the presence of epithelial dysplasia on histologic examination...
December 29, 2017: Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology
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