Overexpression of Sal-like protein 4 in head and neck cancer: epigenetic effects and clinical correlations

AbstractBackgroundSal-like protein 4 (SALL4), an embryonic stem cell factor, has been reported to play an essential role in embryogenesis and oncogenesis. As yet, however, the expression and role of this transcription factor in head and neck squamous cell carcinoma (HNSCC) has not been established.MethodsWe assessedSALL4 mRNA expression in a well-characterised dataset of 230 HNSCC samples (test cohort 110 cases and validation cohort 120 cases). We also transfected HNSCC cells (FaDu and UM-SCC-6) with SALL4 siRNA and assessed its effects on proliferation and expression of specific epigenetic factors in order to uncover the role ofSALL4 in HNSCC.ResultsOverexpression ofSALL4 was detected in tumour samples of both cohorts. HNSCC cells treated with SALL4 siRNA showed a reduction in growth and a decrease in DNA methyltransferase 3 alpha (DNMT3A) expression. In the patient cohorts,SALL4 overexpression was found to significantly correlate with disease recurrence (p 
Source: Cellular Oncology - Category: Cancer & Oncology Source Type: research

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This study aimed to assess the association between PROM1 promoter methylation and head and neck squamous cell carcinoma (HNSCC), and its diagnostic and prognostic value. Bioinformatic analysis was performed using data from the Cancer Genome Atlas-HNSC and Gene Expression Omnibus datasets. The results showed that PROM1 promoter was hypermethylated in HNSCCs compared with normal head and neck tissues (P = 4.58E-37). The area under the receiver-operating characteristic curve based on methylated PROM1 data was 0.799. In addition, PROM1 hypermethylation independently predicted poor overall survival (hazard ratio [HR]: 1.4...
Source: Medicine - Category: Internal Medicine Tags: Research Article: Observational Study Source Type: research
Chia Yu Oral cancer belongs to head and neck squamous cell carcinoma and has been recognized as one of the most prevalent malignancies worldwide. Recent studies have suggested that cancer stem cells (CSCs) may participate in tumor initiation, metastasis and even recurrence, so the regulation of CSCs has drawn significant attention over the past decade. Among various molecules that are associated with CSCs, non-coding RNAs (ncRNAs) have been indicated as key players in the acquisition and maintenance of cancer stemness. In addition, accumulating studies have shown that the aberrant expression of these ncRNAs may serve a...
Source: Cancers - Category: Cancer & Oncology Authors: Tags: Review Source Type: research
Authors: Qian X, Leonard F, Wenhao Y, Sudhoff H, Hoffmann TK, Ferrone S, Kaufmann AM, Albers AE Abstract Cancer stem cell (CSC)-related therapy resistance has become a new obstacle to the successful application of cancer treatment and head and neck squamous cell carcinoma (HNSCC) is no exception to this finding. Head and neck squamous cell carcinoma is highly immune-suppressive, and recently the immune suppression and invasion of HNSCC-CSCs have been characterized. These characteristics have received research and clinical attention because they would enable the stratification of patients into specific cancer s...
Source: HNO - Category: ENT & OMF Tags: HNO Source Type: research
Conclusions: These data suggest that lack of HPV infection is associated with more prominent activation of Wnt/βCatenin signaling pathway and gain of stem-like traits in tobacco-related OSCCs. PMID: 31929745 [PubMed - in process]
Source: International Journal of Medical Sciences - Category: Biomedical Science Tags: Int J Med Sci Source Type: research
Publication date: Available online 9 January 2020Source: Stem Cell ReportsAuthor(s): Raghava R. Sunkara, Rahul M. Sarate, Priyanka Setia, Sanket Shah, Sanjay Gupta, Pankaj Chaturvedi, Poonam Gera, Sanjeev K. WaghmareSummaryWnt signaling is involved in the regulation of cancer stem cells (CSCs); however, the molecular mechanism involved is still obscure. SFRP1, a Wnt inhibitor, is downregulated in various human cancers; however, its role in tumor initiation and CSC regulation remains unexplored. Here, we used a skin carcinogenesis model, which showed early tumor initiation in Sfrp1−/− (Sfrp1 knockout) mice and i...
Source: Stem Cell Reports - Category: Stem Cells Source Type: research
SOX2 is a binding partner and substrate of EGFR. EGFR activation induces SOX2 phosphorylation at Y277 site and reduces its ubiquitination, which inhibit its associated with p62 and subsequent autophagic degradation. Gefitinib, an EGFR tyrosine kinase inhibitor, decreases SOX2 expression via promoting its autophagic degradation. AbstractEpidermal growth factor receptor (EGFR) is highly expressed in head and neck squamous cell carcinoma (HNSCC) and correlates with poor prognosis. EGFR has been demonstrated to be associated with cancer stem cell traits in HNSCC. However, the underlying molecular mechanism is far from elucidat...
Source: Cancer Medicine - Category: Cancer & Oncology Authors: Tags: ORIGINAL RESEARCH Source Type: research
In conclusion, CTD-2357A8.3 may be considered a promising diagnosis biomarker or a therapeutic target for the treatment of HNSCC. PMID: 31807160 [PubMed]
Source: Oncology Letters - Category: Cancer & Oncology Tags: Oncol Lett Source Type: research
Abstract Cancer stem cells (CSCs) play a key role in carcinogenesis and progression of head and neck squamous cell carcinomas (HNSCC). The most common markers indicating for CSCs are: CD44, CD24, CD133, ALDH1A1. Our objective was to evaluate the prognostic potential of CSC markers in HNSCC. The study included 49 patients treated for primary HNSCC, 11 patients with upper respiratory tract epithelial dysplasia and 12 subjects with the normal pharyngeal mucosa as a control group. The frequency and expression levels of the four CSC markers were assessed by immunohistochemistry. Univariate and multivariate analyses wer...
Source: European Journal of Pharmacology - Category: Drugs & Pharmacology Authors: Tags: Eur J Pharmacol Source Type: research
ConclusionDCLK1 expression might be associated with poorer clinical outcomes in HNSCC patients, specifically in HPV(-) move patients. However, larger studies are required to verify our results.
Source: Pathology Research and Practice - Category: Pathology Source Type: research
CONCLUSION: DCLK1 expression might be associated with poorer clinical outcomes in HNSCC patients, specifically in HPV(-) move patients. However, larger studies are required to verify our results. PMID: 31706685 [PubMed - as supplied by publisher]
Source: Pathology, Research and Practice - Category: Pathology Authors: Tags: Pathol Res Pract Source Type: research
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