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https://www.readbyqxmd.com/read/29137261/enhanced-response-of-melanoma-cells-to-mek-inhibitors-following-unbiased-igf-1r-down-regulation
#1
Naida Suleymanova, Caitrin Crudden, Claire Worrall, Anica Dricu, Ada Girnita, Leonard Girnita
Due to its ability to compensate for signals lost following therapeutic MAPK-inhibition, insulin-like growth factor type 1 receptor (IGF-1R) co-targeting is a rational approach for melanoma treatment. However IGF-1R conformational changes associated with its inhibition can preferentially activate MAPK-pathway in a kinase-independent manner, through a process known as biased signaling. We explored the impact of biased IGF-1R signaling, on response to MAPK inhibition in a panel of skin melanoma cell lines with differing MAPK and p53 mutation statuses...
October 10, 2017: Oncotarget
https://www.readbyqxmd.com/read/29124688/uv-induced-molecular-signaling-differences-in-melanoma-and-non-melanoma-skin-cancer
#2
Feng Liu-Smith, Jinjing Jia, Yan Zheng
There are three major types of skin cancer: melanoma, basal cell carcinoma (BCC) and squamous cell carcinoma (SCC). BCC and SCC are often referred to as non-melanoma skin cancer (NMSC). NMSCs are relatively non-lethal and curable by surgery, hence are not reportable in most cancer registries all over the world. Melanoma is the deadliest skin cancer. Its incidence rate (case number) is about 1/10th of that for NMSC, yet its death toll is ~8 fold higher than NMSC.Melanomas arise from melanocytes which are normally located on the basement membrane with dendrites extending into the epidermal keratinocytes...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/29102967/missed-opportunity-to-diagnose-subungual-melanoma-potential-pitfalls
#3
Louise Dunphy, Rossell Morhij, Yash Verma, Andrew Pay
Subungual melanoma, an uncommon form of acral melanoma that arises within the nail matrix, accounts for 1%-3% of all cutaneous melanoma in Caucasians. As subungual melanoma presents in a more disguised manner than cutaneous lesions, increased vigilance is required. It most commonly presents as a discolouration of the nail, nail splitting or nail-bed bleeding. Black pigmentation of the adjacent nail fold, termed Hutchinson's sign, may be a diagnostic clue. Treatment of subungual melanoma remains surgical with wide local excision and amputation primary modalities...
November 3, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/29063342/microradiopharmaceutical-for-metastatic-melanoma
#4
Thiago Goulart Rosa, Sofia Nascimento Dos Santos, Terezina de Jesus Andreoli Pinto, Daniele Dal Molim Ghisleni, Thereza Christina Barja-Fidalgo, Eduardo Ricci-Junior, Mohammed Al-Qahtani, Jan Kozempel, Emerson Soares Bernardes, Ralph Santos-Oliveira
PURPOSE: The purpose of this article was to develop, characterize and test (in vivo) dacarbazine microparticles that may be labeled with 99mTc and Ra-223 for both use: diagnostic and therapy of metastatic melanoma. METHODS: We developed by double emulsion solvent evaporation methodology the microparticle. The characterization has been done using, Dynamic Light Scattering (DLS) and Scanning Electron Microscopy (SEM). The labeling with 99mTc and Ra-223 has been done by the direct labeling process...
October 23, 2017: Pharmaceutical Research
https://www.readbyqxmd.com/read/29057046/synthesis-and-pharmacological-evaluation-of-selective-histone-deacetylase-6-inhibitors-in-melanoma-models
#5
Maurício T Tavares, Sida Shen, Tessa Knox, Melissa Hadley, Zsófia Kutil, Cyril Bařinka, Alejandro Villagra, Alan P Kozikowski
Only a handful of therapies offer significant improvement in the overall survival in cases of melanoma, a cancer whose incidence has continued to rise in the past 30 years. In our effort to identify potent and isoform-selective histone deacetylase (HDAC) inhibitors as a therapeutic approach to melanoma, a series of new HDAC6 inhibitors based on the nexturastat A scaffold were prepared. The new analogues 4d, 4e, and 7b bearing added hydrophilic substituents, so as to establish additional hydrogen bonding on the rim of the HDAC6 catalytic pocket, exhibit improved potency against HDAC6 and retain selectivity over HDAC1...
October 12, 2017: ACS Medicinal Chemistry Letters
https://www.readbyqxmd.com/read/28988380/tumor-infiltrating-immune-cells-as-potential-biomarkers-predicting-response-to-treatment-and-survival-in-patients-with-metastatic-melanoma-receiving-ipilimumab-therapy
#6
Tímea Balatoni, Anita Mohos, Eszter Papp, Tímea Sebestyén, Gabriella Liszkay, Judit Oláh, Anita Varga, Zsuzsanna Lengyel, Gabriella Emri, István Gaudi, Andrea Ladányi
Monoclonal antibodies targeting immune checkpoints are gaining ground in the treatment of melanoma and other cancers, and considerable effort is made to identify biomarkers predicting the efficacy of these therapies. Our retrospective study was performed on surgical tissue samples (52 lymph nodes and 34 cutaneous/subcutaneous metastases) from 30 patients with metastatic melanoma treated with ipilimumab. Using a panel of 11 antibodies against different immune cell types, intratumoral immune cell densities were determined and evaluated in relation to response to ipilimumab treatment and disease outcome...
October 7, 2017: Cancer Immunology, Immunotherapy: CII
https://www.readbyqxmd.com/read/28983955/associations-between-anti-melanoma-differentiation-associated-gene-5-antibody-and-demographics-clinical-characteristics-and-laboratory-results-of-patients-with-dermatomyositis-a-systematic-meta-analysis
#7
Ju Li, Yan Liu, Yongsheng Li, Fang Li, Kai Wang, Wenyou Pan, Deqian Meng
Anti-melanoma differentiation-associated gene 5 (MDA5) antibody is a specific biomarker in patients with dermatomyositis (DM). Results from several studies that examined the relationship between anti-MDA5 antibody and the demographics, clinical characteristics and laboratory results of DM patients have been conflicting. The purpose of this study was to identify the relationship, if any, of anti-MDA5 antibody with demographics, clinical characteristics and laboratory results of DM patients. PubMed, Web of Science, Embase and the Cochrane Library databases were searched for studies without language restrictions conducted before 16 March 2017...
October 6, 2017: Journal of Dermatology
https://www.readbyqxmd.com/read/28983918/how-many-cancer-cases-and-deaths-are-potentially-preventable-estimates-for-australia-in-2013
#8
Louise F Wilson, Annika Antonsson, Adele C Green, Susan J Jordan, Bradley J Kendall, Christina M Nagle, Rachel E Neale, Catherine M Olsen, Penelope M Webb, David C Whiteman
Cancer is a leading cause of disease burden in Australia, particularly fatal burden, accounting for an estimated thirty percent of deaths. Many cancers develop because of exposure to lifestyle and environmental factors that are potentially modifiable. We aimed to quantify the proportions and numbers of cancer deaths and cases in Australia in 2013 attributable to 20 modifiable factors in eight broad groupings that are established causes of cancer, namely: tobacco smoke (smoking and second-hand), dietary factors (low intake of fruit, non-starchy vegetables and dietary fibre; and high intake of red and processed meat), overweight/obesity, alcohol, physical inactivity, solar ultraviolet radiation, infections (seven agents), and reproductive factors (lack of breastfeeding, menopausal hormone therapy use, combined oral contraceptive use)...
October 6, 2017: International Journal of Cancer. Journal International du Cancer
https://www.readbyqxmd.com/read/28979663/finger-pad-squamous-cell-carcinoma-report-of-squamous-cell-carcinoma-of-the-distal-palmar-digit-and-review-of-associated-risk-factors-mimickers-and-treatment-of-squamous-cell-carcinoma-of-ventral-hand-digits
#9
Philip R Cohen, S Brian Jiang
BACKGROUND: Squamous cell carcinoma of the palmar digits is rare. PURPOSE: The authors describe a man with squamous cell carcinoma of the pulp of his left fourth finger, and review the risk factors that may be associated with squamous cell carcinoma development on the ventral digits of the hand. the authors also summarize the clinical differential diagnoses and treatment of squamous cell carcinoma at this location. METHODS: the authors retrospectively reviewed the literature using PubMed and searched for the following terms: squamous cell carcinoma, squamous cell carcinoma in situ, finger, thumb, palmar, and ventral...
August 2017: Journal of Clinical and Aesthetic Dermatology
https://www.readbyqxmd.com/read/28973033/integrative-genetic-analysis-suggests-that-skin-color-modifies-the-genetic-architecture-of-melanoma
#10
Imge Hulur, Andrew D Skol, Eric R Gamazon, Nancy J Cox, Kenan Onel
Melanoma is the deadliest form of skin cancer and presents a significant health care burden in many countries. In addition to ultraviolet radiation in sunlight, the main causal factor for melanoma, genetic factors also play an important role in melanoma susceptibility. Although genome-wide association studies have identified many single nucleotide polymorphisms associated with melanoma, little is known about the proportion of disease risk attributable to these loci and their distribution throughout the genome...
2017: PloS One
https://www.readbyqxmd.com/read/28966942/beta-adrenergic-receptors-are-expressed-across-diverse-cancers
#11
Steven L Rains, Clarissa N Amaya, Brad A Bryan
Based largely on retrospective analyses and a handful of prospective case reports, pharmacological inhibition of the beta adrenergic receptors using beta blockers has shown clinical anti-cancer efficacy in reproductive cancers, as well as angiosarcoma and multiple myeloma. Because of the potential promise of beta blockers as an adjunct to standard anti-cancer therapy, it is imperative to identify other tumor types expressing beta adrenergic (β-AR) receptors so future preclinical and clinical studies can be directed at the most promising tumor targets...
July 2017: Oncoscience
https://www.readbyqxmd.com/read/28945758/melanoma-screening-informing-public-health-policy-with-quantitative-modelling
#12
Stephen Gilmore
Australia and New Zealand share the highest incidence rates of melanoma worldwide. Despite the substantial increase in public and physician awareness of melanoma in Australia over the last 30 years-as a result of the introduction of publicly funded mass media campaigns that began in the early 1980s -mortality has steadily increased during this period. This increased mortality has led investigators to question the relative merits of primary versus secondary prevention; that is, sensible sun exposure practices versus early detection...
2017: PloS One
https://www.readbyqxmd.com/read/28932316/penile-melanosis-associated-with-lichen-sclerosus-et-atrophicus-first-description-in-the-medical-literature
#13
Georgi Tchernev, Anastasiya Atanasova Chokoeva, Hristo Mangarov
We present a 74-year-old male patient with 3-years history of visible discoloration of the glans penis, without subjective complaints. Histopathological examination after incision biopsy revealed a moderate increase in the number of melanocytes in the basal layer with irregular distribution, without melanocytic nests, melanophages in the superficial dermis, and subepidermal sclerosus. No cytologic atypia of melanocytes was detectable. The diagnosis of melanosis of the genitalia in association with lichen sclerosus was made...
August 15, 2017: Open Access Macedonian Journal of Medical Sciences
https://www.readbyqxmd.com/read/28915557/loss-of-p16-ink4a-stimulates-aberrant-mitochondrial-biogenesis-through-a-cdk4-rb-independent-pathway
#14
Ethika Tyagi, Bin Liu, Chelsea Li, Tong Liu, Jared Rutter, Douglas Grossman
The tumor suppressor p16INK4A (p16) inhibits cell cycle progression through the CDK4/Rb pathway. We have previously shown that p16 regulates cellular oxidative stress, independent of its role in cell cycle control. We investigated whether loss of p16 had a direct impact on the mitochondria. We found that p16-null primary mouse fibroblasts (PMFs) displayed increased mitochondrial mass and expression of mitochondrial respiratory subunit proteins compared to wild-type (WT) PMFs. These findings in p16-null PMFs were associated with increased expression of the mitochondrial biogenesis transcription factors PRC and TFAM...
August 22, 2017: Oncotarget
https://www.readbyqxmd.com/read/28820834/super-thin-scip-flap-for-reconstruction-of-subungual-melanoma-aesthetic-functional-surgery
#15
Kyeong-Tae Lee, Bo Young Park, Eun-Ji Kim, Jung-Han Kim, Kee-Taek Jang, Sang-Hee Choi, Dong-Youn Lee, Goo-Hyun Mun
BACKGROUND: This study aimed to use a super-thin, free superficial circumflex iliac artery perforator (SCIP) flap in the functional surgery for treating subungual melanoma and to evaluate its outcomes. METHODS: Forty-one patients with primary subungual melanoma of ≤ 2-mm thickness who were treated with functional surgery were prospectively enrolled. Following oncologic resection, a thin SCIP flap was harvested along the trans-superficial fat layer and transferred to the defect with further thinning by primary defatting...
August 8, 2017: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/28815334/clinical-characteristics-of-patient-selection-and-imaging-predictors-of-outcome-in-solid-tumors-treated-with-checkpoint-inhibitors
#16
REVIEW
Sabrina Rossi, Luca Toschi, Angelo Castello, Fabio Grizzi, Luigi Mansi, Egesta Lopci
The rapidly evolving knowledge on tumor immunology and the continuous implementation of immunotherapy in cancer have recently led to the FDA and EMA approval of several checkpoint inhibitors as immunotherapic agents in clinical practice. Anti-CTLA-4, anti-PD-1, and anti-PDL-1 antibodies are becoming standard of care in advanced melanoma, as well as in relapsed or metastatic lung and kidney cancer, demonstrating higher and longer response compared to standard chemotherapy. These encouraging results have fostered the evaluation of these antibodies either alone or in combination with other therapies in several dozen clinical trials for the treatment of multiple tumor types...
December 2017: European Journal of Nuclear Medicine and Molecular Imaging
https://www.readbyqxmd.com/read/28791053/ros-mediated-apoptosis-and-genotoxicity-induced-by-palladium-nanoparticles-in-human-skin-malignant-melanoma-cells
#17
Saud Alarifi, Daoud Ali, Saad Alkahtani, Rafa S Almeer
The present work was designed to investigate the effect of palladium nanoparticles (PdNPs) on human skin malignant melanoma (A375) cells, for example, induction of apoptosis, cytotoxicity, and DNA damage. Diseases resulting from dermal exposure may have a significant impact on human health. There is a little study that has been reported on the toxic potential of PdNPs on A375. Cytotoxic potential of PdNPs (0, 5, 10, 20, and 40 μg/ml) was measured by tetrazolium bromide (MTT assay) and NRU assay in A375 cells...
2017: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/28753565/enhanced-response-of-melanoma-cells-to-mek-inhibitors-following-unbiased-igf-1r-down-regulation
#18
Naida Suleymanova, Caitrin Crudden, Claire Worrall, Anica Dricu, Ada Girnita, Leonard Girnita
Due to its ability to compensate for signals lost following therapeutic MAPK-inhibition, insulin-like growth factor type 1 receptor (IGF-1R) co-targeting is a rational approach for melanoma treatment. However IGF-1R conformational changes associated with its inhibition can preferentially activate MAPK-pathway in a kinase-independent manner, through a process known as biased signaling. We explored the impact of biased IGF-1R signaling, on response to MAPK inhibition in a panel of skin melanoma cell lines with differing MAPK and p53 mutation statuses...
July 17, 2017: Oncotarget
https://www.readbyqxmd.com/read/28725252/individualized-3d-scanning-and-printing-for-non-melanoma-skin-cancer-brachytherapy-a-financial-study-for-its-integration-into-clinical-workflow
#19
Meritxell Arenas, Sebastià Sabater, Andreu Sintas, Monica Arguís, Víctor Hernández, Miguel Árquez, Iolanda López, Àngeles Rovirosa, Doménec Puig
PURPOSE: Skin cancer is the most common tumor in the population. There are different therapeutic modalities. Brachytherapy is one of the techniques used, in which it is necessary to build customized moulds for some patients. Currently, these moulds are made by hand using rudimentary techniques. We present a new procedure based on 3D printing and the analysis of the clinical workflow. MATERIAL AND METHODS: Moulds can be made either by hand or by automated 3D printing...
June 2017: Journal of Contemporary Brachytherapy
https://www.readbyqxmd.com/read/28724943/aim2-inflammasome-mediated-pyroptosis-in-enterovirus-a71-infected-neuronal-cells-restricts-viral-replication
#20
Thinesshwary Yogarajah, Kien Chai Ong, David Perera, Kum Thong Wong
Encephalomyelitis is a well-known complication of hand, foot, and mouth disease (HFMD) due to Enterovirus 71 (EV71) infection. Viral RNA/antigens could be detected in the central nervous system (CNS) neurons in fatal encephalomyelitis but the mechanisms of neuronal cell death is not clearly understood. We investigated the role of absent in melanoma 2 (AIM2) inflammasome in neuronal cell death, and its relationship to viral replication. Our transcriptomic analysis, RT-qPCR, Western blot, immunofluorescence and flow cytometry studies consistently showed AIM2 gene up-regulation and protein expression in EV-A71-infected SK-N-SH cells...
July 19, 2017: Scientific Reports
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