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https://www.readbyqxmd.com/read/28323577/mitigation-of-radiation-induced-epithelial-damage-by-the-tlr5-agonist-entolimod-in-a-mouse-model-of-fractionated-head-and-neck-irradiation
#1
Ilia A Toshkov, Anatoli S Gleiberman, Vadim L Mett, Alan D Hutson, Anurag K Singh, Andrei V Gudkov, Lyudmila G Burdelya
Radiation treatment of head and neck cancer frequently causes severe collateral damage to normal tissues including mouth mucosa, salivary glands and skin. This toxicity limits the radiation dose that can be delivered and affects the patient's quality of life. Previous studies in mice and nonhuman primates showed that entolimod, a toll-like receptor 5 (TLR5) agonist derived from bacterial flagellin, effectively reduced radiation damage to hematopoietic and gastrointestinal tissues in both total-body and local irradiation scenarios, with no protection of tumors...
March 21, 2017: Radiation Research
https://www.readbyqxmd.com/read/28319637/online-patient-reported-reviews-of-mohs-micrographic-surgery-qualitative-analysis-of-positive-and-negative-experiences
#2
Shuai Xu, Zaza Atanelov, Ashish C Bhatia
Mohs micrographic surgery (MMS) is the gold standard for treating high-risk skin cancers and skin cancers in areas where skin sparing is essential. However, relatively little is known about patient-reported satisfaction with this procedure. In this study, we used qualitative research methods to determine themes of patient-reported satisfaction and dissatisfaction with MMS on one popular online resource (RealSelf). Real-world patient feedback provides an opportunity for physicians to explore the patient mind-set and to target areas of potential improvement in MMS patient satisfaction...
February 2017: Cutis; Cutaneous Medicine for the Practitioner
https://www.readbyqxmd.com/read/28319625/photoprotection-prevents-skin-cancer-let-s-make-it-fashionable-to-wear-sun-protective-clothing
#3
Jeffrey M Milch, Nicholas F Logemann
Protection from UV radiation (UVR) is of paramount importance in preventing skin cancers, the majority of which occur on sun-exposed areas of the face, ears, and neck. A reusable, inexpensive, and truly simple measure of personal protection that greatly reduces exposure to UVR, thereby reducing the risk for developing skin cancers, can be achieved simply by regularly wearing a wide-brimmed hat. In some areas of the world where sunny climates are pervasive and exposure to UVR is part of everyday life, fashion trends, policy, and public health initiatives are in sync, and photoprotection with wide-brimmed hats is embraced as a common and fashionable practice...
February 2017: Cutis; Cutaneous Medicine for the Practitioner
https://www.readbyqxmd.com/read/28319090/a-single-copy-sleeping-beauty-transposon-mutagenesis-screen-identifies-new-pten-cooperating-tumor-suppressor-genes
#4
Jorge de la Rosa, Julia Weber, Mathias Josef Friedrich, Yilong Li, Lena Rad, Hannes Ponstingl, Qi Liang, Sandra Bernaldo de Quirós, Imran Noorani, Emmanouil Metzakopian, Alexander Strong, Meng Amy Li, Aurora Astudillo, María Teresa Fernández-García, María Soledad Fernández-García, Gary J Hoffman, Rocío Fuente, George S Vassiliou, Roland Rad, Carlos López-Otín, Allan Bradley, Juan Cadiñanos
The overwhelming number of genetic alterations identified through cancer genome sequencing requires complementary approaches to interpret their significance and interactions. Here we developed a novel whole-body insertional mutagenesis screen in mice, which was designed for the discovery of Pten-cooperating tumor suppressors. Toward this aim, we coupled mobilization of a single-copy inactivating Sleeping Beauty transposon to Pten disruption within the same genome. The analysis of 278 transposition-induced prostate, breast and skin tumors detected tissue-specific and shared data sets of known and candidate genes involved in cancer...
March 20, 2017: Nature Genetics
https://www.readbyqxmd.com/read/28317522/skin-cancer-risk-nonmelanoma-skin-cancers-melanoma-in-vitiligo-patients
#5
REVIEW
Michelle Rodrigues
The relative genetic and immune protection against melanoma and nonmelanoma skin cancers in those with vitiligo is reassuring. The results of recent studies allow us to be cautiously optimistic when discussing the risk of skin cancer caused by therapeutic exposure to narrow-band ultraviolet B light. However, we should continue to recommend sun protection at all other times to avoid burning in vitiliginous skin and to decrease incidental ultraviolet exposure. It is also important to perform full skin checks regularly in light of the prolonged courses of phototherapy required to repigment vitiliginous skin and maintain repigmentation thereafter...
April 2017: Dermatologic Clinics
https://www.readbyqxmd.com/read/28314866/a-clinical-trial-using-attrition-combined-with-5-aminolevulinic-acids-based-photodynamic-therapy-in-treating-squamous-cell-carcinoma
#6
Jianzhong Peng, Weiguo Feng, Xianyan Luo, Tao Wang, Wenzhong Xiang, Yeqin Dai, Jingyu Zhu, Junhui Zheng
BACKGROUND Squamous cell carcinoma (SCC) is the second most common type of skin cancer, for which non- or mini-invasive treatment is of critical importance. 5-aminolevulinic acids based photodynamic therapy (ALA-PDT) is a mini-invasive approach that causes focal tumor cell injury, apoptosis, and necrosis through light sensitivity. The efficacy of combining ALA-PDT and surgery in treating SCC, however, has not been demonstrated. MATERIAL AND METHODS A total of 60 SCC patients were randomly assigned into attrition plus ALA-PDT group (experimental group) and single ALA-PDT treatment group (control group)...
March 18, 2017: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/28304067/lipid-remodelling-in-human-melanoma-cells-in-response-to-uva-exposure
#7
Elisabete Maciel, Juliana Felgueiras, Eduarda M P Silva, Fernando Ricardo, Ana S P Moreira, Tânia Melo, Ana Campos, Margarida Fardilha, Pedro Domingues, M Rosário Domingues
Extensive exposure to UVA is thought to increase the risk of malignancy and the progression of melanoma, the most serious type of skin cancer. It is well known that alterations in lipid metabolism represent an early event in carcinogenesis, but the impact of UVA exposure on the lipid composition of cancer cells is still largely unknown. In this study we aimed at investigating lipid remodeling in human melanoma cells in response to UVA exposure. After UVA irradiation, lipid extracts were either immediately collected from SK-MEL-28 cells or collected after a recovery period of 2 h or 24 h...
March 17, 2017: Photochemical & Photobiological Sciences
https://www.readbyqxmd.com/read/28303522/nanotechnology-for-the-treatment-of-melanoma-skin-cancer
#8
REVIEW
Lucas B Naves, Chetna Dhand, Jayarama Reddy Venugopal, Lakshminarayanan Rajamani, Seeram Ramakrishna, Luis Almeida
Melanoma is the most aggressive type of skin cancer and has very high rates of mortality. An early stage melanoma can be surgically removed, with a survival rate of 99%. This literature review intends to elucidate the possibilities to treat melanoma skin cancer using hybrid nanofibers developed by advanced electrospinning process. In this review we have shown that the enhanced permeability and retention is the basis for using nanotechnology, aiming topical drug delivery. The importance of the detection of skin cancer in the early stages is directly related to non-metastatic effects and survival rates of melanoma cells...
March 16, 2017: Progress in biomaterials
https://www.readbyqxmd.com/read/28302995/conversion-from-calcineurin-inhibitor-based-immunosuppression-to-mycophenolate-mofetil-in-monotherapy-reduces-risk-of-de-novo-malignancies-after-liver-transplantation
#9
Diego Aguiar, Diego Martínez-Urbistondo, Delia D'Avola, Mercedes Iñarrairaegui, Fernando Pardo, Fernando Rotellar, Bruno Sangro, Jorge Quiroga, Jose Ignacio Herrero
BACKGROUND Immunosuppression increases the risk of malignancy in liver transplant recipients. The potential impact of mycophenolate mofetil monotherapy on this risk has not been studied. MATERIAL AND METHODS The incidence and risk factors for de novo malignancies of 392 liver transplant recipients with a survival higher than 3 months and a mean follow-up of 8.5 years were studied. RESULTS De novo malignancies were diagnosed in 126 patients (32.1%) (64 non-melanoma skin cancer and 81 other malignancies). Sixty-nine patients (18...
March 17, 2017: Annals of Transplantation: Quarterly of the Polish Transplantation Society
https://www.readbyqxmd.com/read/28302562/dysregulated-expression-of-microrna-150-in-human-papillomavirus-induced-lesions-of-k14-hpv16-transgenic-mice
#10
Joana M O Santos, Mara Fernandes, Rita Araújo, Hugo Sousa, Joana Ribeiro, Margarida M S M Bastos, Paula A Oliveira, Diogo Carmo, Fátima Casaca, Sandra Silva, Ana L Teixeira, Rui M Gil da Costa, Rui Medeiros
AIMS: High-risk human papillomavirus (HPV) infection is one of the major causes of infection-related cancers worldwide. MicroRNAs (miRNAs) are a family of non-coding RNAs (ncRNAs), whose dysregulated levels may cause an aberrant expression of genes involved in oncogenic pathways and consequently lead to cancer development. This is the case of the miRNA-150 (miR-150), whose expression in HPV-induced lesions remains unclear and the present work aims to clarify it. We employed K14-HPV16 mice, which express the early genes of HPV16 in basal keratinocytes, leading to the development of hyperplastic and dysplastic skin lesions and squamous cell carcinomas, and are a representative model of HPV-induced cancers...
March 13, 2017: Life Sciences
https://www.readbyqxmd.com/read/28302011/the-pharmacological-mechanisms-and-therapeutic-activities-of-hydroxychloroquine-in-rheumatic-and-related-diseases
#11
Changfeng Hu, Lu Lu, Jie-Ping Wan, Chengping Wen
Hydroxychloroquine (HCQ) is known as one of the most fascinating synthetic antimalarial drugs during the last 50 years. It is currently among the most commonly employed medicines for the clinical treatment of rheumatic diseases, especially systemic lupus erythematosus and rheumatoid arthritis. In related mechanism studies, it has been found that HCQ possesses various immunomodulatory and anti-inflammatory activities. In addition, the effects of HCQ on anti-platelet, metabolic pathways, and antineoplasticity have also been disclosed in more recent studies...
March 16, 2017: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/28301979/short-time-uva-exposure-to-human-keratinocytes-instigated-polyunsaturated-fatty-acid-without-inducing-lipid-peroxidation
#12
Kin Sum Leung, Hok Fung Chan, Ho Hang Leung, Jean-Marie Galano, Camille Oger, Thierry Durand, Jetty Chung-Yung Lee
Short-term exposure to ultraviolet A (UVA) radiation can directly injure our skin through inflammatory response and indirectly through oxidative stress, triggering polyunsaturated fatty acid (PUFA) peroxidation in skin cell membrane and formation of DNA adduct, 8-hydroxy-2'-deoxyguanosine (8-OHdG). It is known that UVA exposure leads to photoaging, immunosuppression and skin cancer. However, the changes in PUFA and its oxidized metabolites, and cell cycle after short UVA exposure, are debatable. In this study, human keratinocytes (HaCaT) were exposed to low dose (5 J/cm(2)) and high dose (20 J/cm(2)) of UVA and assessed immediately, 8 h, 12 h, and 24 h post-treatment...
March 17, 2017: Free Radical Research
https://www.readbyqxmd.com/read/28301624/photodynamic-therapy-effectively-treats-actinic-keratoses-without-pre-illumination-incubation-time
#13
Jessica Gandy, Brian Labadie, Dina Bierman, Christopher Zachary
<p>BACKGROUND: Actinic keratoses (AKs) are dysplastic lesions of the epidermis that have the potential to progress to non-melanoma skin cancers (NMSC). Traditional photodynamic therapy (PDT) requires a pre-illumination incubation time, which adds to overall in-office time and has been linked to pain. Our group has found a novel protocol to effectively treat AKs with PDT that eliminates the pre-illumination incubation period and uses 2 back-to-back cycles of 16 minute 40 seconds.</p> <p>METHODS: The patient was prepped with soapy water and isopropyl alcohol, and thick AKs were descaled with a curette...
March 1, 2017: Journal of Drugs in Dermatology: JDD
https://www.readbyqxmd.com/read/28301516/follistatin-attenuates-radiation-induced-fibrosis-in-a-murine-model
#14
Helen B Forrester, David M de Kretser, Trevor Leong, Jim Hagekyriakou, Carl N Sprung
PURPOSE: Fibrosis can be a disabling, severe side effect of radiotherapy that can occur in patients, and for which there is currently no effective treatment. The activins, proteins which are members of the TGFβ superfamily, have a major role in stimulating the inflammatory response and subsequent fibrosis. Follistatin is an endogenous protein that binds the activins virtually irreversibly and inhibits their actions. These studies test if follistatin can attenuate the fibrotic response using a murine model of radiation-induced fibrosis...
2017: PloS One
https://www.readbyqxmd.com/read/28301513/influence-of-a-pre-stimulation-with-chronic-low-dose-uvb-on-stress-response-mechanisms-in-human-skin-fibroblasts
#15
Marie-Catherine Drigeard Desgarnier, Frédéric Fournier, Arnaud Droit, Patrick J Rochette
Exposure to solar ultraviolet type B (UVB), through the induction of cyclobutane pyrimidine dimer (CPD), is the major risk factor for cutaneous cancer. Cells respond to UV-induced CPD by triggering the DNA damage response (DDR) responsible for signaling DNA repair, programmed cell death and cell cycle arrest. Underlying mechanisms implicated in the DDR have been extensively studied using single acute UVB irradiation. However, little is known concerning the consequences of chronic low-dose of UVB (CLUV) on the DDR...
2017: PloS One
https://www.readbyqxmd.com/read/28300911/cutaneous-metastasis-as-the-first-manifestation-of-occult-malignant-breast-neoplasia
#16
Ellem Tatiani de Souza Weimann, Erica Bruder Botero, Cinthia Mendes, Marcel Alex Soares Dos Santos, Rafael Fantelli Stelini, Caroline Romanelli T Zelenika
Cutaneous metastases from primary internal malignancies represent 0.7-9% of patients with cancer. We report a 65-year-old female patient referred for evaluation of normochromic papules on the trunk and upper limbs that had been present for three months. A skin biopsy revealed diffuse cutaneous infiltration by small round cell tumors. Immunohistochemistry was positive for AE1/AE3, CK7, estrogen receptor and mammaglobin. The final diagnosis was cutaneous metastasis of occult breast cancer, since the solid primary tumor was not identified...
September 2016: Anais Brasileiros de Dermatologia
https://www.readbyqxmd.com/read/28300910/ovarian-carcinoma-presenting-as-cutaneous-nasal-metastasis
#17
Ana Marta António, João Vitor Alves, João Goulão, Elvira Bártolo
Metastatic ovarian cancer uncommonly presents with skin metastasis. When present, skin metastases of ovarian cancer are usually localized in the vicinity of the primary tumor. We report a case of a 58-year-old woman with a rapid growing erythematous, well-defined nodule localized on the left nasal ala. A skin biopsy was performed and histopathological and immunohistochemical findings were compatible with a cutaneous metastasis of adenocarcinoma. A systematic investigation revealed a bilateral ovarian cystadenocarcinoma associated with visceral dissemination, likely associated with nose cutaneous metastasis...
September 2016: Anais Brasileiros de Dermatologia
https://www.readbyqxmd.com/read/28300891/lichen-planopilaris-like-eruption-during-treatment-with-tyrosine-kinase-inhibitor-nilotinib
#18
Juliana Ribeiro Leitão, Neusa Yuriko Sakai Valente, Priscila Kakizaki, Isis Suga Veronez, Mario Cezar Pires
Tyrosine kinase inhibitors are effective as a target therapy for malignant neoplasms. Imatinib was the first tyrosine kinase inhibitor used. After its introduction, several other drugs have appeared with a similar mechanism of action, but less prone to causing resistance. Even though these drugs are selective, their toxicity does not exclusively target cancer cells, and skin toxicity is the most common non-hematologic adverse effect. We report an eruption similar to lichen planopilaris that developed during therapy with nilotinib, a second generation tyrosine kinase inhibitor, in a patient with chronic myeloid leukemia resistant to imatinib...
September 2016: Anais Brasileiros de Dermatologia
https://www.readbyqxmd.com/read/28300789/anti-cancer-activity-of-resveratrol-and-derivatives-produced-by-grapevine-cell-suspensions-in-a-14-l-stirred-bioreactor
#19
Laetitia Nivelle, Jane Hubert, Eric Courot, Philippe Jeandet, Aziz Aziz, Jean-Marc Nuzillard, Jean-Hugues Renault, Christophe Clément, Laurent Martiny, Dominique Delmas, Michel Tarpin
In the present study, resveratrol and various oligomeric derivatives were obtained from a 14 L bioreactor culture of elicited grapevine cell suspensions (Vitis labrusca L.). The crude ethyl acetate stilbene extract obtained from the culture medium was fractionated by centrifugal partition chromatography (CPC) using a gradient elution method and the major stilbenes contained in the fractions were subsequently identified by using a (13)C-NMR-based dereplication procedure and further 2D NMR analyses including HSQC, HMBC, and COSY...
March 16, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28300597/gli2-is-a-regulator-of-%C3%AE-catenin-and-is-associated-with-loss-of-e-cadherin-cell-invasiveness-and-long-term-epidermal-regeneration
#20
Eleni Pantazi, Emilios Gemenetzidis, Muy-Teck Teh, Sreekanth Vootukuri Reddy, Gary Warnes, Chris Evagora, Giuseppe Trigiante, Michael P Philpott
Uncontrolled HH/GLI and WNT/β-catenin signaling are important events in the genesis of many cancers including skin cancer and are often implicated in tumour progression, invasion and metastasis. However, due to the complexity and context-dependency of both pathways, little is known about HH and WNT interactions in human carcinogenesis. In the current study we provide evidence of HH/GLI2-WNT/β-catenin signaling crosstalk in human keratinocytes. Over-expression of GLI2ΔN in human keratinocytes resulted in cytoplasmic accumulation and nuclear relocalization of β-catenin in vitro and in 3D-organotypic cultures, accompanied by upregulation of WNT genes...
March 11, 2017: Journal of Investigative Dermatology
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