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https://www.readbyqxmd.com/read/28327651/inhibition-of-cathepsin-s-confers-sensitivity-to-methyl-protodioscin-in-oral-cancer-cells-via-activation-of-p38-mapk-jnk-signaling-pathways
#1
Ming-Ju Hsieh, Chiao-Wen Lin, Mu-Kuan Chen, Su-Yu Chien, Yu-Sheng Lo, Yi-Ching Chuang, Yi-Ting Hsi, Chia-Chieh Lin, Jui-Chieh Chen, Shun-Fa Yang
Oral cancer is one of the most common cancers in the world. Approximately 90% of oral cancers are subtyped to oral squamous cell carcinoma (OSCC). Despite advances in diagnostic techniques and improvement in treatment modalities, the prognosis remains poor. Therefore, an effective chemotherapy mechanism that enhances tumor sensitivity to chemotherapeutics is urgently needed. Methyl protodioscin (MP) is a furostanol bisglycoside with a wide range of beneficial effects, including anti-inflammatory and anti-cancer properties...
March 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28326594/hypoacetylation-of-acetyl-histone-h3-h3k9ac-as-marker-of-poor-prognosis-in-oral-cancer
#2
Liana Preto Webber, Vivian Petersen Wagner, Marina Curra, Pablo Agustin Vargas, Luise Meurer, Vinícius Coelho Carrard, Cristiane Helena Squarize, Rogério Moraes Castilho, Manoela Domingues Martins
AIMS: Epigenetics refers to changes in cell characteristics that occur independently of modifications to the DNA sequence. Oral carcinogenesis is influenced by modifications in epigenetic mechanisms, including changes in histones, which are proteins that support chromatin remodeling for the dynamic regulation of gene expression and silencing. The dysregulation of histone acetylation can lead to the uncontrolled activity of different genes, thereby triggering events associated with malignant transformation...
March 22, 2017: Histopathology
https://www.readbyqxmd.com/read/28322198/multiple-and-recurrent-squamous-cell-carcinoma-of-the-oral-cavity-after-graft-versus-host-disease
#3
Xiu Hong Weng, Yu Zhen Xing, Bo Cheng
Oral squamous cell carcinoma (OSCC) is one of the most common secondary solid tumors in patients who have undergone hematopoietic stem cell transplantation (HSCT). However, according to previous reports, multiple and recurrent OSCC is very rare. The presented case shows the susceptibility to the development of secondary malignancies, particularly oral cancer, of patients who present with chronic graft-versus-host disease after HSCT. OSCC after HSCT appears to be more invasive and has a tendency to recur, with a poor prognosis...
February 22, 2017: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28320702/actinic-cheilosis-early-intervention-prevents-malignant-transformation
#4
Arvind Muthukrishnan, Laliytha Bijai Kumar
Potentially malignant disorders (PMD) have a high risk of malignant transformation. Habits such as tobacco and alcohol use predispose to PMD and subsequently to an oral carcinoma. Oral squamous cell carcinoma (OSCC) can occur even without the usage of tobacco. Occupational exposure to actinic rays may predispose to the development of OSCC in the lip. People who are involved in farming or those exposed to an environmental background radiation, such as ultraviolet rays, develop a PMD called actinic cheilosis...
March 20, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28320298/sodium-orthovanadate-inhibits-proliferation-and-triggers-apoptosis-in-oral-squamous-cell-carcinoma-in-vitro
#5
A A Khalil, M J Jameson
Sodium orthovanadate (SOV) is a general inhibitor of tyrosine phosphatases, a large family of enzymes that catalyze the removal of phosphate groups from tyrosine residues. SOV is commonly used in the laboratory to preserve the protein tyrosyl phosphorylation state of proteins under study. It has shown promising antineoplastic activity in some human cancer cell lines; this effect has not been fully investigated in head and neck squamous cell carcinoma. In this study, the effect of SOV on cell growth, proliferation, viability, and apoptosis was assessed in Cal27 cells, an oral squamous cell carcinoma (OSCC) cell line...
February 2017: Biochemistry. Biokhimii︠a︡
https://www.readbyqxmd.com/read/28318929/biomarkers-in-diagnosis-and-therapy-of-oral-squamous-cell-carcinoma-a-review-of-the-literature
#6
Sebastian Blatt, Maximilian Krüger, Thomas Ziebart, Keyvan Sagheb, Eik Schiegnitz, Elisabeth Goetze, Bilal Al-Nawas, Andreas Max Pabst
Oral squamous cell carcinoma (OSCC) represents the sixth most common cancer, accounting for 2-4% of all malignancies worldwide. The overall survival rate of less than 60% remains generally poor, with prognosis heavily relying on the TNM staging system. Tumor size as well as the presence and extent of lymph node metastases are widely recognized as the most important predictors. However, the underlying mechanisms that lead to an aggressive phenotype are not yet fully understood. Therefore, possible biomarkers are much in need to predict prognosis, to help individualize therapy approaches, and to overcome possible resistance mechanisms...
February 16, 2017: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/28315328/tead4-yap-interaction-regulates-tumoral-growth-by-controlling-cell-cycle-arrest-at-the-g1-phase
#7
Shin Takeuchi, Atsushi Kasamatsu, Masanobu Yamatoji, Dai Nakashima, Yosuke Endo-Sakamoto, Nao Koide, Toshikazu Takahara, Toshihiro Shimizu, Manabu Iyoda, Katsunori Ogawara, Masashi Shiiba, Hideki Tanzawa, Katsuhiro Uzawa
TEA domain transcription factor 4 (TEAD4), which has critical functions in the process of embryonic development, is expressed in various cancers. However, the important role of TEAD4 in human oral squamous cell carcinomas (OSCCs) remain unclear. Here we investigated the TEAD4 expression level and the functional mechanism in OSCC using quantitative reverse transcriptase-polymerase chain reaction, Western blot analysis, and immunohistochemistry. Furthermore, TEAD4 knockdown model was used to evaluate cellular proliferation, cell-cycle analysis, and the interaction between TEAD4 and Yes-associated protein (YAP) which was reported to be a transcription coactivator of cellular proliferation...
March 14, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28314265/next-generation-sequencing-for-microrna-profiling-microrna-21-3p-promotes-oral-cancer-metastasis
#8
Hui-Hwa Tseng, Yu-Kai Tseng, Jyun-Jie You, Bor-Hwang Kang, Tsung-Han Wang, Cheng-Mei Yang, Hung-Chih Chen, Huei-Han Liou, Pei-Feng Liu, Luo-Ping Ger, Kuo-Wang Tsai
Dysfunctional microRNAs (miRNAs) play a crucial role in oral squamous cell carcinoma (OSCC) progression. In the present study, we performed next-generation sequencing for miRNA profiling of the OSCC tissues and corresponding adjacent normal tissues in two patients with OSCC. We observed that 45 miRNAs were substantially up-regulated and 17 miRNAs were down-regulated in OSCC tissues. Since information on the biological role of miR-21-3p (passenger strand) in OSCC is limited, the expression levels of miR-21-3p were further evaluated in 95 OSCC tissue samples by a stem-loop real-time polymerase chain reaction...
March 2017: Anticancer Research
https://www.readbyqxmd.com/read/28303350/immunohistochemical-evaluation-of-klotho-and-dna-methyltransferase-3a-in-oral-squamous-cell-carcinomas
#9
Bhoj Raj Adhikari, Osamu Uehara, Hirofumi Matsuoka, Rie Takai, Fumiya Harada, Masafumi Utsunomiya, Takatoshi Chujo, Tetsuro Morikawa, Mamata Shakya, Koki Yoshida, Jun Sato, Toshiya Arakawa, Michiko Nishimura, Hiroki Nagayasu, Itsuo Chiba, Yoshihiro Abiko
Carcinoma follows a course of multiple changes that are affected by several important factors, with epigenetic silencing of the promoter gene being one of them. A series of studies have suggested that epigenetic changes in the anti-aging gene Klotho may be one of the emerging areas of concern in the study of carcinogenesis. We hypothesized that epigenetic silencing of Klotho due to hypermethylation of DNMT3a may be one of the causes of carcinoma in the oral and maxillofacial region. In this study, we analyzed the immunohistochemical expressions of Klotho and DNMT3a in tissues obtained from oral dysplasia and oral squamous cell carcinoma...
March 16, 2017: Medical Molecular Morphology
https://www.readbyqxmd.com/read/28301069/expression-of-akr1b10-as-an-independent-marker-for-poor-prognosis-in-human-oral-squamous-cell-carcinoma
#10
Hui-Hsin Ko, Shih-Lung Cheng, Jang-Jaer Lee, Hsin-Ming Chen, Mark Yen-Ping Kuo, Shih-Jung Cheng
BACKGROUND: Aldo-keto reductase family 1 member B10 (AKR1B10) is implicated in xenobiotic detoxification and has disparate functions in tumorigenesis that are dependent on the cell types. The purpose of this study was to investigate the clinicopathological significance of AKR1B10 as a prognostic marker for oral squamous cell carcinomas (OSCCs). METHODS: AKR1B10 protein expression was analyzed by immunohistochemistry in 77 patients with OSCC. RESULTS: The AKR1B10 labeling score for OSCCs (1...
March 16, 2017: Head & Neck
https://www.readbyqxmd.com/read/28294427/e-cadherin-mediated-impairment-increases-anti-apoptotic-mechanism-through-upregulation-of-bcl-2-an-immunohistochemical-study-in-various-patterns-of-invasion-of-oral-squamous-cell-carcinoma
#11
Nikita Gulati, Devi Charan Shetty, Ajit Singh Rathore, Saurabh Juneja, Anshi Jain
BACKGROUND: Bcl-2 and E-cadherin proteins are known to be involved in the control of apoptotic cell death and invasive potential, respectively, which is an important hallmark of tumor regulation that influences their biologic behavior. AIM: The current study investigates the relationship of Bcl-2 and E-cadherin immunoexpression to histopathological and clinical prognostic factors in oral squamous cell carcinomas, and correlates E-cadherin/Bcl-2 ratio with Bryne's patterns of invasion...
March 14, 2017: Journal of Oral Pathology & Medicine
https://www.readbyqxmd.com/read/28293492/a-rare-case-of-malignant-transformation-of-oral-lichen-planus-of-the-mandible
#12
Joanne Soo, George Kokosis, Michael Ogilvie, Xiaoyin Sara Jiang, David B Powers, Daniel J Rocke, Detlev Erdmann
Oral lichen planus (OLP) is an immune-mediated mucocutaneous disease associated with an increased risk in oral squamous cell carcinoma (OSCC). Nearly all cases of malignant transformation have been reported in patients >40 years old. We report the case of a 37-year-old woman with a 5-year history of erosive OLP who presented with malignant transformation to OSCC. Delineating the margins of the disease was impossible at presentation given her OLP, and she was initially treated with concurrent chemoradiation therapy...
December 2016: Plastic and Reconstructive Surgery. Global Open
https://www.readbyqxmd.com/read/28292939/a-fas-ligand-fasl-fused-humanized-antibody-against-tumor-associated-glycoprotein-72-selectively-exhibits-the-cytotoxic-effect-against-oral-cancer-cells-with-a-low-fasl-fas-ratio
#13
Ming-Hsien Chien, Wei-Min Chang, Wei-Jiunn Lee, Yu-Chan Chang, Tsung-Ching Lai, Derek V Chan, Rahul Sharma, Yuan-Feng Lin, Michael Hsiao
Altered expression of the Fas ligand (FasL)/Fas ratio exhibits a direct impact on the prognosis of cancer patients and its impairment in cancer cells may lead to apoptosis resistance. Thus, the development of effective therapies targeting the FasL/Fas system may play an important role in the fight against cancer. In this study, we evaluated whether fusion of a protein (hcc49scFv-FasL) of the cytotoxicity domain of the FasL to a humanized antibody (CC49) against tumor-associated glycoprotein 72, which is expressed on oral squamous cell carcinoma (OSCC), can selectively kill OSCC cells with different FasL/Fas ratios...
March 14, 2017: Molecular Cancer Therapeutics
https://www.readbyqxmd.com/read/28289590/susceptibility-to-oral-squamous-cell-carcinoma-correlation-with-variants-of-cyp1a1-mspi-gstt1-gstm1-aldh2-ec-sod-and-lifestyle-factors
#14
T-T Dong, L-J Wang, L-Z Liu, S-N Ma
In order to investigate the association between polymorphisms in genes encoding metabolizing enzymes (CYP1A1-MspI, EC-SOD (extracellular superoxide dismutase), GSTT1, GSTM1, ALDH2), cigarette and alcohol consumption, and the risk of oral squamous cell carcinoma, we conducted a prospective case-control study comprised of 750 individuals with oral squamous cell carcinoma (OSCC) and 750 healthy individuals. Data about smoking and drinking habits were collected along with other demographic and clinical information...
December 1, 2016: Balkan Journal of Medical Genetics: BJMG
https://www.readbyqxmd.com/read/28286742/persistent-exposure-to-porphyromonas-gingivalis-promotes-proliferative-and-invasion-capabilities-and-tumorigenic-properties-of-human-immortalized-oral-epithelial-cells
#15
Fengxue Geng, Junchao Liu, Yan Guo, Chen Li, Hongyang Wang, Hongyan Wang, Haijiao Zhao, Yaping Pan
Recent epidemiological studies revealed a significant association between oral squamous cell carcinoma (OSCC) and Porphyromonas gingivalis, a major pathogen of periodontal disease. As a keystone pathogen of periodontitis, P. gingivalis is known not only to damage local periodontal tissues, but also to evade the host immune system and eventually affect systemic health. However, its role in OSCC has yet to be defined. To explore the underlying effect of chronic P. gingivalis infection on OSCC and to identify relevant biomarkers as promising targets for therapy and prevention, we established a novel model by exposing human immortalized oral epithelial cells (HIOECs) to P...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/28285966/hypoxia-reduces-the-e-cadherin-expression-and-increases-oscc-cell-migration-regardless-of-the-e-cadherin-methylation-profile
#16
Patrícia Luciana Batista Domingos, Marcela Gonçalves Souza, Talita Antunes Guimarães, Eliane Sobrinho Santos, Lucyana Conceição Farias, Carlos Alberto de Carvalho Fraga, Kimberly Marie Jones, Sérgio Henrique Souza Santos, Alfredo Maurício Batista de Paula, André Luiz Sena Guimarães
OBJECTIVE: The purpose of the current study is to investigate the association between E-cadherin methylation status, hypoxia and OSCC. METHODS: HaCat and SCC9 cell lines were submitted to hypoxic treatment, followed by methylation profile analysis (MS-PCR) and analysis of the expression of mRNA gene E-cadherin (RT-PCR). Study group samples comprise individuals affected by potentially malignant lesions Potential Malignant Oral Lesion (PMOL, n=18) and oral squamous cell carcinoma (OSCC, n=28)...
February 20, 2017: Pathology, Research and Practice
https://www.readbyqxmd.com/read/28283788/follow-up-of-oral-and-oropharyngeal-cancer-using-narrow-band-imaging-and-high-definition-television-with-rigid-endoscope-to-obtain-an-early-diagnosis-of-second-primary-tumors-a-prospective-study
#17
Giancarlo Tirelli, Marco Piovesana, Pierluigi Bonini, Annalisa Gatto, Giuseppe Azzarello, Francesca Boscolo Nata
Narrow-band imaging (NBI) is an optical technique enhancing mucosal vasculature. The aim of this study is to assess the effectiveness of rigid NBI endoscopy in the early detection of second primaries or local recurrences after treatment for oral (OSCC) and oropharyngeal squamous cell carcinoma (OPSCC), its advantage over standard white-light (WL) endoscopy, and the influence of previous radiotherapy, the learning curve, and lesion site. Between January 2013 and June 2015, 195 patients treated for OSCC or OPSCC with surgery alone (group A) or radiotherapy with or without surgery and/or chemotherapy (group B) underwent additional follow-up assessments using NBI...
March 10, 2017: European Archives of Oto-rhino-laryngology
https://www.readbyqxmd.com/read/28282802/in-situ-memory-t-cells-and-patterns-of-invasion-predict-outcome-in-patients-with-early-stage-oral-squamous-cell-carcinoma
#18
Shan Wang, Jiankai Xu, Yan Meng, Dongxia Qiang, Changsheng Sun, Lei Shi, Eryang Zhao
PURPOSE: The objective of this study was to explore the prognostic value of in situ memory T cells and patterns of invasion (POI) in early stage oral squamous cell carcinoma (OSCC). METHODS: One hundred fifty-seven patients with early stage (cT1T2N0) OSCC were identified from a pre-existing database of patients with oral cancer and were classified by POI according to hematoxylin-eosin staining. We examined the impact of the immunohistochemical expression of CD45RO in OSCC...
March 3, 2017: Cancer Biomarkers: Section A of Disease Markers
https://www.readbyqxmd.com/read/28279058/-preliminary-study-on-the-role-of-voltage-gated-sodium-channel-subtype-nav1-5-in-lymph-node-metastasis-of-oral-squamous-cell-carcinoma
#19
W J Liu, L Xu, X W Zhu, X F Chen, H Wang, Y Jiang
Objective: To investigate the relationship between the expression of voltage-gated sodium channel subtype Nav1.5 in oral squamous cell carcinoma (OSCC) and the occurrence and lymph node metastasis of OSCC. Methods: Totally 10 samples of normal oral mucosa tissue as control group, 26 samples of OSCC as the experimental group was divided into non-metastatic group (n=16) and metastatic group (n=10) according to the presence or absence of lymph node metastasis. Quantitative real-time PCR (qPCR), Western blotting, immunohistochemistry, and enzyme-linked immunosorbent assay (ELISA) were used to detect the expression of Nav1...
March 9, 2017: Zhonghua Kou Qiang Yi Xue za Zhi, Zhonghua Kouqiang Yixue Zazhi, Chinese Journal of Stomatology
https://www.readbyqxmd.com/read/28276309/analysis-of-microrna-mrna-interactions-in-stem-cell-enriched-fraction-of-oral-squamous-cell-carcinoma
#20
Vinitha Richard, Rajesh Raju, Aswathy Mary Paul, Reshmi Girijadevi, Thankayyan Retnabai Santhoshkumar, Madhavan Radhakrishna Pillai
This study is an integrated analysis of the transcriptome profile, MicroRNA (miRNA) and their experimentally validatedmRNA targets differentially expressed in the tumorigenic stem-like fraction of oral squamous cell carcinoma (OSCC). We had previously reported the co-existence of multiple drug resistant, tumorigenic fractions termed as side population (SP1, SP2 and MP2) and a non-tumorigenic fraction, main population (MP1) in oral cancer. These fractions displayed self-renewal, regeneration potential and expressed known stemness related cell surface markers despite functional differences...
March 9, 2017: Oncology Research
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