Frequent Skin Cancers May Signal Risk of Others

For the study, the researchers analyzed the DNA of 61 patients with frequent basal cell carcinomas, and found 20 percent had mutations in genes that help repair DNA damage in body cells. Cancer arises when such abnormal cells grow and spread unchecked.
Source: WebMD Health - Category: Consumer Health News Source Type: news

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Publication date: Available online 13 September 2018Source: British Journal of Oral and Maxillofacial SurgeryAuthor(s): A.J. Dalal, J. Ingham, B. Collard, G. MerrickAbstractWe provide a non-melanoma skin cancer (NMSC) service for skin cancers of the head and neck in the south-west of England. We hypothesised that certain anatomical sites such as the nose and eyelid would have a higher incidence of close or involved margins than others, and that the choice of repair might influence the excised margins. We therefore retrospectively analysed the data of 500 consecutive NMSC that were operated on in the oral and maxillofacial ...
Source: British Journal of Oral and Maxillofacial Surgery - Category: ENT & OMF Source Type: research
Abstract Ovarian clear cell carcinoma (OCCC) is distinctive from other histological types of epithelial ovarian cancer, with genetic/epigenetic alterations, a specific immune-related molecular profile, and epidemiologic associations with ethnicity and endometriosis. These findings allow for the exploration of unique and specific treatments for OCCC. Two major mutated genes in OCCC are PIK3CA and ARID1A, which are frequently coexistent with each other. Other genes' alterations also contribute to activation of the PI3K (e.g. PIK3R1 and PTEN) and dysregulation of the chromatin remodeling complex (e.g. ARID1B, and SMA...
Source: Gynecologic Oncology - Category: Cancer & Oncology Authors: Tags: Gynecol Oncol Source Type: research
In this study, we examined the anti-HCC effects of melatonin and elucidated the regulatory mechanisms. The results of functional assays showed that in addition to inhibiting the proliferation, migration, and invasion abilities of HCC cells, melatonin suppressed their DNA repair capacity, thereby promoting the cytotoxicity of chemotherapy and radiotherapy. Whole-transcriptome and gain- and loss-of-function analyses revealed that melatonin induces expression of the long noncoding RNA RAD51-AS1, which binds to RAD51 mRNA to inhibit its translation, effectively decreasing the DNA repair capacity of HCC cells and increasing the...
Source: Cancers - Category: Cancer & Oncology Authors: Tags: Article Source Type: research
Infection with high oncogenic risk human papillomavirus types is the etiological factor of cervical cancer and a major cause of other epithelial malignancies, including vulvar, vaginal, anal, penile and head and neck carcinomas. These agents affect epithelial homeostasis through the expression of specific proteins that deregulate important cellular signaling pathways to achieve efficient viral replication. Among the major targets of viral proteins are components of the DNA damage detection and repair machinery. The activation of many of these cellular factors is critical to process viral genome replication intermediates an...
Source: Clinics - Category: General Medicine Source Type: research
Authors: Meucci S, Keilholz U, Heim D, Klauschen F, Cacciatore S Abstract Lung squamous cell carcinoma (LUSC) is the most common cause of global cancer-related mortality and the major risk factors is smoking consumption. By analyzing ∼500 LUSC samples from The Cancer Genome Atlas, we detected a higher mutational burden as well as a higher level of methylation changes in younger patients. The SNPs mutational profiling showed enrichments of smoking-related signature 4 and defective DNA mismatch repair (MMR)-related signature 6 in younger patients, while the defective DNA MMR signature 26 was enriched among older ...
Source: Oncotarget - Category: Cancer & Oncology Tags: Oncotarget Source Type: research
Abstract The aim of the study was to understand the role of homologous recombination repair (HRR) pathway genes in development of chemotolerance in breast cancer (BC). For this purpose, chemotolerant BC cells were developed in MCF-7 and MDA MB 231 cell lines after treatment with two anthracycline anti-tumor antibiotics doxorubicin and nogalamycin at different concentrations for 48 h with differential cell viability. The drugs were more effective in MCF-7 (IC50: 0.214-0.242 µM) than in MDA MB 231 (IC50: 0.346-0.37 µM) as shown by cell viability assay. The drugs could reduce the protein ex...
Source: Molecular and Cellular Biochemistry - Category: Biochemistry Authors: Tags: Mol Cell Biochem Source Type: research
Objective(s): To assess the frequency of 3 single nucleotide polymorphisms (SNPs) in 2 DNA repair genes, RAD51 and XRCC3, in individuals without cancer and patients with oral squamous cell carcinoma (OSCC) and oropharyngeal squamous cell carcinoma (ORSC) and to investigate the relationships of these findings with clinical and pathological data and clinical outcomes.
Source: Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology, and Endodontics - Category: ENT & OMF Authors: Tags: Oral and Maxillofacial Pathology Source Type: research
Abstract Squamous cell carcinoma is a rare histological type of breast cancer classified as metaplastic carcinoma. Metaplastic carcinoma involves differentiation of the breast glandular duct cells into mesenchymal tissues. While the chemotherapy regimen for metaplastic carcinoma is often similar to that for invasive ductal carcinoma, recurrence is associated with a poor prognosis due to the inadequate therapeutic efficacy of the regimen. We herein present the case of a 42-year-old female patient who underwent mastectomy of the right breast and right axillary node lymphadenectomy for T4N3aM0 breast cancer stage. Th...
Source: Clinical Breast Cancer - Category: Cancer & Oncology Authors: Tags: Mol Clin Oncol Source Type: research
Conditions:   Cervical Cancer;   Gastric Cancer (Including Stomach and Gastroesophageal Junction);   Esophageal Cancer;   Hepatocellular Carcinoma;   Melanoma (Uveal Melanoma Excluded);   Merkel Cell Carcinoma;   Mesothelioma;   Microsatellite Instability (MSI)-High/ Deficient Mismatch Repair ( dMMR) Tumors;   Non-small Cell Lung Cancer (NSCLC);   Ovarian Cancer;   Squamous Cell Carcinoma of the Head and Neck;   Small Cell Lung Cancer;   Renal&nb...
Source: ClinicalTrials.gov - Category: Research Source Type: clinical trials
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