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Oral premalignant

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https://www.readbyqxmd.com/read/27924796/detection-and-phylogenetic-analysis-of-torque-teno-virus-in-salivary-and-tumor-biopsy-samples-from-head-and-neck-carcinoma-patients
#1
Andrea Hettmann, Anett Demcsák, Ádám Bach, Gábor Decsi, Ágnes Dencs, Dóra Pálinkó, László Rovó, Katalin Nagy, Janos Minarovits, Mária Takács
OBJECTIVES: Because torque teno virus (TTV) has been implicated in tumorigenesis as a cocarcinogen, we studied TTV prevalence in saliva and biopsy samples from head and neck cancer (HNCC) patients, patients with premalignant lesions of oral cancer, and controls. We also wished to determine the TTV genotypes in HNCC patients. METHODS: A seminested polymerase chain reaction (PCR) amplifying the N22 region of the TTV genome, as well as direct sequencing of PCR fragments, was used...
December 8, 2016: Intervirology
https://www.readbyqxmd.com/read/27914100/transient-immunological-and-clinical-effectiveness-of-treating-mice-bearing-premalignant-oral-lesions-with-pd-1-antibodies
#2
Corinne A Levingston, M Rita I Young
A carcinogen-induced premalignant oral lesion model that progresses to oral cancer was used to examine the impact of blocking PD-1 on cytokine expression and on progression of lesions to cancer. The results of this study show increased production of IL-2 and the inflammatory cytokines IL-6, IL-17 and TNF-α by spleen cells of lesion-bearing mice that were treated with PD-1 antibody for one week compared to cytokine production by spleen cells of lesion-bearing mice treated with control antibody. Production of IFN-γ increased at 3 weeks of PD-1 antibody treatment, although production of the other Th1 and inflammatory mediators declined...
December 3, 2016: International Journal of Cancer. Journal International du Cancer
https://www.readbyqxmd.com/read/27881522/prevalence-of-papillomavirus-in-brazil-a-systematic-review-protocol
#3
Verônica Colpani, Augusto Bacelo Bidinotto, Maicon Falavigna, Silvana Pereira Giozza, Adele Schwartz Benzaken, Cristina Pimenta, Ana Goretti Kalume Maranhão, Carla Magda Allan Santos Domingues, Luciano Serpa Hammes, Eliana M Wendland
INTRODUCTION: Human papillomavirus (HPV) infection is a cause of premalignant and malignant cancer in the lower genital and digestive tracts. In Brazil, there have been no prevalence studies that included a nationwide sample, and the prevalence of HPV has not been determined in many regions. METHODS: We will search the EMBASE, LILACS, MEDLINE, Web of Science and SciELO databases and previously published review articles to identify original research articles assessing HPV prevalence of the perineal (cervical, penile and anal) and oral areas...
November 22, 2016: BMJ Open
https://www.readbyqxmd.com/read/27833864/a-clinical-study-of-oral-mucosal-lesions-in-patients-visiting-a-tertiary-care-centre-in-central-india
#4
Rashmi Goyal, Shalini Jadia, Leena Jain, Chhavi Agarawal
The aim of this study was to find the frequency of various oral mucosal lesions in relation to age, sex, site and associated addiction habits. This retrospective study was done in tertiary care centre including 1280 patients of oral mucosal lesions. Clinical findings and detailed history of their addiction habits with frequency and duration was noted from the existing data. Cytological and histopathological diagnosis of various lesions was recorded to conclude diagnosis. The most common lesion in this study was found to be aphthous ulcers (44...
December 2016: Indian Journal of Otolaryngology and Head and Neck Surgery
https://www.readbyqxmd.com/read/27829738/adjunctive-aids-for-the-detection-of-oral-premalignancy
#5
REVIEW
D Charanya, L P Raghupathy, Amjad Fazeela Farzana, R Murugan, R Krishnaraj, G Kalarani
Early detection of cancer greatly decreases the morbidity and mortality rates and thereby increases the 5-year survival rates. In developing countries like India where the disease is highly prevalent focus is mainly on decreasing the mortality rates which can be easily achieved by detection at an asymptomatic stage. Visual examination has been the standard screening method for screening oral cancer through several decades, and it is well known that conventional visual examination is limited to subjective interpretation and cannot be easily achieved in certain anatomical sites...
October 2016: Journal of Pharmacy & Bioallied Sciences
https://www.readbyqxmd.com/read/27824386/noak-behandling-%C3%A3-kar-risken-f%C3%A3-r-gastrointestinal-bl%C3%A3-dning-kan-avsl%C3%A3-ja-allvarlig-sjukdom-%C3%A2-strukturerad-uppf%C3%A3-ljning-viktig
#6
Anna Haeggström, Dag Risberg, Faris Al-Kahlili, Åsa Gilstring, Ulrika Tullberg, Håkan Wallén
Gastrointestinal bleeding during treatment with non -vitamin K antagonist oral anticoagulants (NOACs) may be caused by malignant lesions Gastrointestinal bleeding due to underlying malignancy may not be uncommon in real life patients on non vitamin K antagonist oral anticoagulants (NOACs) like dabigatran, rivaroxaban or apixaban. We performed a small pilot study in patients referred to endoscopy due to suspected gastrointestinal bleeding. In twenty NOAC-treated patients, we found four cases of manifest malignant colon tumors, one premalignant colon adenoma, and one gastric B-cell lymphoma...
November 7, 2016: Läkartidningen
https://www.readbyqxmd.com/read/27801978/high-resolution-dna-content-analysis-of-microbiopsy-samples-in-oral-lichen-planus
#7
M Pentenero, M Monticone, R Marino, C Aiello, G Marchitto, D Malacarne, W Giaretti, S Gandolfo, P Castagnola
OBJECTIVES: DNA aneuploidy has been reported to be a predictor of poor prognosis in both premalignant and malignant lesions. In oral lichen planus (OLP) this hypothesis remains to be proved. This study aims to determine the rate of occurrence of DNA aneuploidy in OLP patients by high-resolution DNA flow cytometry. METHODS: OLP patients were consecutively enrolled. Tissue samples were subdivided for formalin fixation and routine histological assessment and for immediate storage at -20°C for later DNA ploidy analysis, which was performed by DAPI staining of the extracted nuclei and excitation with a UV lamp...
November 1, 2016: Oral Diseases
https://www.readbyqxmd.com/read/27794159/expression-of-myofibroblasts-in-oral-squamous-cell-carcinoma-an-immunohistochemical-study
#8
B Vikas Prasad, Gauri S Kakatkar, Preet Jain, Meetu Jain, Maulik Patel, Javed Khan
INTRODUCTION: Oral squamous cell carcinoma (OSCC) is one of the most common types of malignancy affecting the orafacial region and with a high mortality rate. The fact that stroma of the tumor modulates and facilitates the progression and metastasis of the malignancy has been shown in the past studies. The cells of the activated stroma that are responsible for the progression and metastasis of the tumor are the fibroblasts having smooth muscle properties. These myofibroblasts are said to secrete numerous inflammatory mediators and factors which are said to play a crucial role in tumor progression...
October 1, 2016: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/27756983/evaluation-of-cytomorphometric-changes-in-tobacco-users-and-diagnosed-oral-squamous-cell-carcinoma-individuals
#9
Urmila Udayashankar, Vijay Srinivas Guduru, Anuradha Ananthaneni, Sabitha Devi Ramisetty, Puneeth Horatti Kuberappa, Srilekha Namala
AIMS: To determine the cellular and nuclear area of keratinocytes in smears obtained from the oral mucosa of tobacco users, those with oral squamous cell carcinoma (OSCC), and from normal healthy persons and resolve if any significant difference exists in these three groups. MATERIALS AND METHODS: The study group comprised 100 subjects 20 controls, (40 OSCC patients-20 from lesional sites and 20 from nonlesional sites, 20 tobacco smokers and 20 tobacco chewers) in the age group of 25-75 years...
July 2016: Journal of Cytology
https://www.readbyqxmd.com/read/27721608/argyrophilic-nuclear-organizer-region-and-p73-expression-in-head-and-neck-squamous-cell-carcinomas-teammates-or-adversaries
#10
Sunil Pazhayanur Venkateswaran, Leviana Ercylina Nathan, Vimi Sunil Mutalik, Noor Hasni Shamsuddin
CONTEXT: Head and neck squamous cell carcinoma (HNSCC) consists of squamous cell carcinomas (SCCs) arising in the upper aerodigestive tract and accounts for 5% of cancers worldwide. In Malaysia, cancers of the nasopharynx, larynx, tongue and oral cavity are among the top twenty most common cancers in men. Argyrophilic nuclear organizer regions (AgNORs) are increased from normal mucosa to premalignant lesions to malignant lesions and have been associated with tumor grade and prognosis of patients...
September 2016: Journal of Oral and Maxillofacial Pathology: JOMFP
https://www.readbyqxmd.com/read/27721603/dysplastic-change-rate-in-cases-of-oral-lichen-planus-a-retrospective-study-of-112-cases-in-an-iranian-population
#11
Soussan Irani, Alireza Monsef Esfahani, Anahita Ghorbani
BACKGROUNDS: Lichen planus is a chronic systemic disease and oral mucosa is commonly involved. Oral lichen planus (OLP) most commonly affects middle-aged women. The prevalence of the disease ranges between 0.5% and 2.6% in the general population and the range of malignant transformation varies between 0% and 10%. OBJECTIVES: To assess the rate of malignant transformation of OLP samples. MATERIALS AND METHODS: This retrospective study was carried out on 112 medical records of patients with histological diagnosis of OLP who attended the Department of Pathology at the Educational Hospital from 2005 to 2012...
September 2016: Journal of Oral and Maxillofacial Pathology: JOMFP
https://www.readbyqxmd.com/read/27720656/microrna-375-as-a-biomarker-for-malignant-transformation-in-oral-lesions
#12
Amani M Harrandah, Sarah G Fitzpatrick, Molly H Smith, Dunrui Wang, Donald M Cohen, Edward K L Chan
OBJECTIVE: Malignant transformation of oral premalignant lesions is the key process in the progression to oral squamous cell carcinoma (OSCC). Previously, we identified miR-7 and miR-21 as candidate oncogenes and miR-375 and miR-494 as candidate tumor suppressors in OSCC. We aim to evaluate these microRNAs as biomarkers of malignant transformation in oral premalignant lesions. STUDY DESIGN: Formalin-fixed, paraffin-embedded samples from progressive premalignant lesions and paired sequential OSCC tumors at the same site were obtained from same patients (n = 31)...
December 2016: Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology
https://www.readbyqxmd.com/read/27713748/indomethacin-treatment-of-mice-with-premalignant-oral-lesions-sustains-cytokine-production-and-slows-progression-to-cancer
#13
Sara D Johnson, M Rita I Young
Current treatment options for head and neck squamous cell carcinoma (HNSCC) patients are often ineffective due to tumor-localized and systemic immunosuppression. Using the 4-NQO mouse model of oral carcinogenesis, this study showed that premalignant oral lesion cells produce higher levels of the immune modulator, PGE2, compared to HNSCC cells. Inhibiting prostaglandin production of premalignant lesion cells with the pan-cyclooxygenase inhibitor indomethacin stimulated their induction of spleen cell cytokine production...
2016: Frontiers in Immunology
https://www.readbyqxmd.com/read/27708346/role-of-areca-nut-induced-jnk-atf2-jun-axis-in-the-activation-of-tgf-%C3%AE-pathway-in-precancerous-oral-submucous-fibrosis
#14
Ila Pant, S Girish Rao, Paturu Kondaiah
Oral submucous fibrosis (OSF) is potentially premalignant with progressive and irreversible extracellular matrix deposition accompanied by epithelial atrophy and like other fibrotic disorders, is primarily a TGF-β driven disease. OSF is caused by prolonged chewing of areca nut. Our previous studies reported a pivotal role for TGF-β activation and its effects contributing to OSF. However, the mechanism for activation of TGF-β signaling in OSF is still unknown. In this study we demonstrate activation of TGF-β signaling with sub-cytotoxic dose of areca nut in epithelial cells and discovered a key role for pJNK in this process...
October 6, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27698724/clinical-characteristics-and-analysis-of-familial-oral-lichen-planus-in-eight-chinese-families
#15
Shu-Lai Lu, Xiang-Min Qi, Gang Dong, Shu-Lan Chen, Da-Wei Guo, Yun-Long Wang, Pi-Shan Yang
Oral lichen planus (OLP) is one of the most common oral mucosa diseases; however, familial OLP is uncommon. The present study reported and analyzed patients with familial OLP (n=18) in eight different Chinese families between January 1, 2012 and December 31, 2013. Parameters analyzed include gender, age at diagnosis, lesion distribution and lesion type. The follow-up period for each patient was a minimum of 1 year. In this survey, 18/88 individuals in the eight families were affected. Females were more frequently affected, and the female to male ratio for familial OLP (2...
October 2016: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/27671184/association-of-smokeless-tobacco-with-oral-cancer-evidence-from-the-south-asian-studies-a-systematic-review
#16
Kamran Habib Awan, Shankargouda Patil
Smokeless tobacco (SLT) is associated with many heath hazards including oral cancer. Its use is more common in South Asian countries. The current paper aims to systematically review the South Asian studies to assess the association of SLT and oral cancer. Detailed automated literature searches of PubMed, Medline, EMBASE and ISI Web of Science from January 1980 to July 2015 were conducted using the key words "oral cancer", "oral precancer", "oral premalignant lesions", "oral squamous cell carcinoma", "smokeless tobacco", "betel quid", "areca nut", "Gutkha" in various combinations...
September 2016: Journal of the College of Physicians and Surgeons—Pakistan: JCPSP
https://www.readbyqxmd.com/read/27659090/evaluation-of-potential-risk-factors-that-contribute-to-malignant-transformation-of-oral-lichen-planus-a-literature-review
#17
Farzaneh Agha-Hosseini, Nafiseh Sheykhbahaei, Maryam-Sadat SadrZadeh-Afshar
AIM: Many studies have suggested that a lesion originally diagnosed as oral lichen planus (OLP) has different possibilities of undergoing malignant transformation in time, although these findings remain a controversial issue; for example, some studies reported different values of potential malignancy of OLP. INTRODUCTION: World Health Organization (WHO) classifies OLP as a "potentially malignant disorder" with unspecified malignant transformation risk, and suggests that OLP patients should be closely monitored...
2016: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/27658889/grape-seed-procyanidin-extract-mediates-antineoplastic-effects-against-lung-cancer-via-modulations-of-prostacyclin-and-15-hete-eicosanoid-pathways
#18
Jenny T Mao, Jane Smoake, Heesung K Park, Qing-Yi Lu, Bingye Xue
Grape seed procyanidin extract (GSE) has been reported to exert antineoplastic properties via the inhibition of cyclooxygenase-2 (COX-2)/prostaglandin E2 (PGE2) eicosanoid pathways. In addition, ample data link carcinogenesis to inflammatory events involving other major eicosanoid metabolic pathways, including prostacyclin (PGI2) and 15-hydroxyeicosatetraenoic acid (15-HETE). We therefore evaluated the effects of GSE on prostacyclin synthase (PTGIS)/PGI2 and 15-lipoxigenase-2 (15-LOX-2)/15-HETE productions by human lung premalignant and malignant cells and correlated the findings with antiproliferative or proapoptotic effects of GSE...
December 2016: Cancer Prevention Research
https://www.readbyqxmd.com/read/27652247/assessment-of-micronuclei-frequency-in-individuals-with-a-habit-of-tobacco-by-means-of-exfoliated-oral-buccal-cells
#19
Tanvi Dosi, Dhaman Gupta, Alka Hazari, Rajan Rajput, Prabhav Chauhan, Anushri S Rajapuri
AIMS AND OBJECTIVES: To study the genotoxic effects of tobacco on the exfoliated buccal epithelial cells in patients with oral precancerous lesions (OPLs) and Patients with tobacco habit but without oral precancerous lesion(habit controls) by using micronucleus assay as well as the quantification and detection of the biomarkers in these premalignant lesions which will be helpful in finding those patients who are at higher risk for malignant transformation. MATERIALS AND METHODS: Forty samples were collected from the right and left side of buccal epithelial cells obtained from 20 individuals, i...
August 2016: Journal of International Society of Preventive & Community Dentistry
https://www.readbyqxmd.com/read/27644680/prevalence-and-factors-associated-with-oral-pre-malignant-lesions-in-northeast-thailand
#20
Narongrit Juntanong, Pallop Siewchaisakul, Peter Bradshaw, Patravoot Vatanasapt, Sam Li-Sheng Chen, Amy Ming-Fang Yen, Tony Hsiu-Hsi Chen, Supannee Promthet
BACKGROUND: Oral cavity cancer (OCC) is one of the most common cancers worldwide. No studies have reported on the prevalence and epidemiologic risk factors of oral premalignant lesions (OPLs) in Thailand. The purpose of this study was to investigate the prevalence of OPLs and associated factors in Roi Et Province, Thailand. MATERIALS AND METHODS: To investigate the prevalence of OPLs, a cross-sectional descriptive study was conducted in which 2,300 subjects over 40 years of age were recruited and screened for the prevalence of OPLs...
2016: Asian Pacific Journal of Cancer Prevention: APJCP
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