Translational Genomics and Recent Advances in Oral Squamous Cell Carcinoma

Publication date: Available online 19 September 2019Source: Seminars in Cancer BiologyAuthor(s): Annie Wai Yeeng Chai, Kue Peng Lim, Sok Ching CheongAbstractOral squamous cell carcinomas (OSCC) are a heterogeneous group of cancers arising from the mucosal lining of the oral cavity. A majority of these cancers are associated with lifestyle risk habits including smoking, excessive alcohol consumption and betel quid chewing. Cetuximab, targeting the epidermal growth factor receptor was approved for the treatment of OSCC in 2006, and remains the only molecular targeted therapy available for OSCC. Here, we reviewed the current findings from genomic analyses of OSCC and discuss how these studies inform on the biological mechanisms underlying OSCC. Exome sequencing revealed that the significantly mutated genes are mainly tumour suppressors. Mutations in FAT1, CASP8, CDKN2A, and NOTCH1 are more frequently found in OSCC when compared to non-OSCC head and neck cancers and other squamous cell carcinomas, and HRAS and PIK3CA are the only significantly mutated oncogenes. The distribution of these mutations also differs in populations with distinct risk habits. Gene expression-based molecular classification showed that OSCC can be divided into distinct subtypes and these have a preferential response to different types of therapies, suggesting that these classifications could have clinical implications. More recently, with the approval of checkpoint inhibitors for the treatment of cancers i...
Source: Seminars in Cancer Biology - Category: Cancer & Oncology Source Type: research

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Publication date: Available online 14 October 2019Source: Respiratory Medicine Case ReportsAuthor(s): Takeshi Matsumoto, Yusuke Kusakabe, Masamitsu Enomoto, Naoki Yamamoto, Kensaku Aihara, Shinpachi Yamaoka, Michiaki MishimaAbstractPulmonary actinomycosis reportedly forms 15% of all cases of actinomycosis, and pulmonary Actinomyces odontolyticus is particularly rare. A 60-year-old man with a hoarse voice was referred to our hospital. Lung squamous cell carcinoma was diagnosed at the clinical tumor-node-metastasis stage of cT2N2M0, and concurrent chemoradiotherapy was initiated. Further, a small cavity was also detected in ...
Source: Respiratory Medicine Case Reports - Category: Respiratory Medicine Source Type: research
Publication date: Available online 14 October 2019Source: Pulmonary Pharmacology &TherapeuticsAuthor(s): Huda Badri, Jaclyn A. SmithAbstractCough is mediated by vagal afferent fibres innervating the larynx and proximal airways. Pre-clinical studies suggest that vagal C fibres produce Substance P, one of the tachykinin family of neuropeptides, which has been shown to enhance cough via the neurokinin-1 (NK-1) receptor and studies in animal models have also shown that NK-1 antagonists are effective at blocking induced cough. In the past, tachykinin receptor antagonists have yielded disappointing results in treating asthma...
Source: Pulmonary Pharmacology and Therapeutics - Category: Respiratory Medicine Source Type: research
Discussion Iodine enhancement images can be used to calculate CT perfusion maps of blood flow, and compared with 80 kVp images, results showed only a small difference of 1 mL/100 mL/min in blood flow in healthy tissue, whereas patient radiation exposure was increased for dynamic DECT. Perfusion maps calculated based on iodine-enhancement images showed lower blood flow in fatty tissues surrounding the pancreas, indicating reduced susceptibility to residual patient breathing motion during the acquisition.
Source: Investigative Radiology - Category: Radiology Tags: Original Articles Source Type: research
Objectives The goals of this study were to compare the efficacy of the new manganese-based magnetic resonance imaging (MRI) contrast agent Mn-PyC3A to the commercial gadolinium-based agents Gd-DOTA and to Gd-EOB-DTPA to detect tumors in murine models of breast cancer and metastatic liver disease, respectively, and to quantify the fractional excretion and elimination of Mn-PyC3A in rats. Methods T1-weighted contrast-enhanced MRI with 0.1 mmol/kg Mn-PyC3A was compared with 0.1 mmol/kg Gd-DOTA in a breast cancer mouse model (n = 8) and to 0.025 mmol/kg Gd-EOB-DTPA in a liver metastasis mouse model (n = 6). The fractional...
Source: Investigative Radiology - Category: Radiology Tags: Original Articles Source Type: research
This study aims at prospectively evaluating an adapted DWI sequence ex vivo and in vivo in oncologic patients undergoing abdominal MRI. Methods This institutional review board–approved, prospective study included phantom measurements, volunteer examinations, and oncologic patient examinations of the abdomen. Fifty-seven MRI examinations in 54 patients (mean age, 58 years; range, 21–90 years) were included into the analysis. The MRI examination were performed at a 1.5 T MRI scanner (MAGNETOM Aera; Siemens Healthcare, Erlangen, Germany) and included both a standard EPI-DWI (s-DWI; b = 50, 900 s/mm2) and an ada...
Source: Investigative Radiology - Category: Radiology Tags: Original Articles Source Type: research
ConclusionOur clinical outcomes are comparable overall to the three main published articles on this topic. The risk of infection and benefits of preventative fixation were apparent in our cohort.Level of evidenceIV, retrospective study.
Source: Orthopaedics and Traumatology: Surgery and Research - Category: Orthopaedics Source Type: research
ConclusionNeoadjuvant chemotherapy followed by laparoscopic and open radical hysterectomy seems to be a safe treatment option for locally advanced cervical cancer, in terms of similar survival outcomes and morbidity of treatment with CCRT. However, the present study is too limited to permit conclusions due to its small sample size and retrospective design despite statistical methods for adjusting confounding factors.
Source: Journal of Minimally Invasive Gynecology - Category: OBGYN Source Type: research
ConclusionOverall hyperplasia incidence is increasing. While BMI is elevated, there was no upward trend observed. Does the insidious decline in age demographic suggest that hyperplasia is occurring in younger women? Our review did not demonstrate a continuous increase in atypia, however there was a higher incidence in the 2013 group, who were also the most obese. Adherence to best practice surveillance in our hospitals was falling short.
Source: Journal of Minimally Invasive Gynecology - Category: OBGYN Source Type: research
Conclusion Most head and neck pathologies show a broad cellular heterogeneity making it difficult to achieve an accurate diagnosis and efficient treatment (Graf and Zavodszky, 2017; Lo Nigro et al., 2017). Single cell analysis of circadian omics (Lande-Diner et al., 2015; Abraham et al., 2018), may be a crucial tool needed in the future to fully understand the circadian control of head and neck diseases. It becomes more obvious that there is only a small genetic component but a largely unknown epigenetics and/or environmental component for most of the head and neck pathologies (Moosavi and Motevalizadeh Ardekani, 2016; He...
Source: Frontiers in Physiology - Category: Physiology Source Type: research
Authors: Ottria L, Candotto V, Cura F, Baggi L, Arcuri C, Nardone M, Gaudio RM, Gatto R, Spadari F, Carinci F Abstract In addition to tobacco and alcohol consumption, the two main risk factors for oral squamous cell carcinoma (OSCC), recent studies have revealed infections with human papilloma virus (HPV) as an additional risk factor for OSCC development. In the field of head and neck malignancies, the prevalence of HPV infections in oropharyngeal cancer (OC) ranges in different studies up to 84%. While HPV infection is discussed as an independent risk factor in this region, its distinguished role in carcinogenesis...
Source: Journal of Biological Regulators and Homeostatic Agents - Category: Biomedical Science Tags: J Biol Regul Homeost Agents Source Type: research
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