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Uveal melanoma

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https://www.readbyqxmd.com/read/28330694/cant1-lncrna-triggers-efficient-therapeutic-efficacy-by-correcting-aberrant-lncing-cascade-in-malignant-uveal-melanoma
#1
Yue Xing, Xuyang Wen, Xia Ding, Jiayan Fan, Peiwei Chai, Renbing Jia, Shengfang Ge, Guanxiang Qian, He Zhang, Xianqun Fan
Uveal melanoma (UM) is an intraocular malignant tumor with a high mortality rate. Recent studies have shown the functions of long non-coding RNAs (lncRNAs) in tumorigenesis; thus, targeting tumor-specific lncRNA abnormalities has become an attractive approach for developing therapeutics to treat uveal melanoma. In this study, we identified a novel nuclear CANT1 lncRNA (CASC15-New-Transcript 1) that acts as a necessary UM suppressor. CANT1 significantly reduced tumor metastatic capacity and tumor formation, either in cell culture or in animals harboring tumor xenograft...
March 18, 2017: Molecular Therapy: the Journal of the American Society of Gene Therapy
https://www.readbyqxmd.com/read/28303962/identification-of-novel-chemotherapeutic-strategies-for-metastatic-uveal-melanoma
#2
Paolo Fagone, Rosario Caltabiano, Andrea Russo, Gabriella Lupo, Carmelina Daniela Anfuso, Maria Sofia Basile, Antonio Longo, Ferdinando Nicoletti, Rocco De Pasquale, Massimo Libra, Michele Reibaldi
Melanoma of the uveal tract accounts for approximately 5% of all melanomas and represents the most common primary intraocular malignancy. Despite improvements in diagnosis and more effective local therapies for primary cancer, the rate of metastatic death has not changed in the past forty years. In the present study, we made use of bioinformatics to analyze the data obtained from three public available microarray datasets on uveal melanoma in an attempt to identify novel putative chemotherapeutic options for the liver metastatic disease...
March 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28302097/objective-response-to-mtor-inhibition-in-a-metastatic-collision-tumor-of-the-liver-composed-of-melanoma-and-adenocarcinoma-with-tsc1-loss-a-case-report
#3
Munveer S Bhangoo, Jenny Y Zhou, Siraj M Ali, Russell Madison, Alexa B Schrock, Carrie Costantini
BACKGROUND: Collision tumors are uncommon but well described clinical entities composed of distinct tumor histologies occurring within the same anatomic site. Optimal management of patients with collision tumors remains highly variable and depends on clinical characteristics such as the involved tumor types, predominant histology, as well as the extent of disease. Comprehensive genomic profiling is a means of identifying genomic alterations to suggest benefit from targeted therapy. CASE PRESENTATION: A 78-year-old woman presented to medical oncology with liver metastases occurring within the background of a 1-year history of uveal melanoma...
March 16, 2017: BMC Cancer
https://www.readbyqxmd.com/read/28284838/prl-3-ptp4a3-phosphatase-regulates-integrin-%C3%AE-1-in-adhesion-structures-during-migration-of-human-ocular-melanoma-cells
#4
Malika Foy, Océane Anézo, Simon Saule, Nathalie Planque
In a previous transcriptomic analysis of 63 ocular melanomas of the uvea, we found that expression of the PRL-3/PTP4A3 gene, encoding a phosphatase that is anchored to the plasma membrane, was associated with the risk of metastasis, and a poor prognosis. We also showed that PRL-3 overexpression in OCM-1 ocular melanoma cells significantly increased cell migration in vitro and invasiveness in vivo, suggesting a direct role for PRL-3 in the metastatic spreading of uveal melanoma. Here, we aimed to identify PRL-3 substrates at the plasma membrane involved in adhesion to the extracellular matrix...
March 8, 2017: Experimental Cell Research
https://www.readbyqxmd.com/read/28278076/adenovirus-based-strategies-enhance-antitumor-capability-through-p53-mediated-downregulation-of-mgmt-in-uveal-melanoma
#5
Xun Li, Ling Yuan, Jianfeng Zhao, Hui Yang, Yunzhi Yang, Yanfei Zhang, Biyun Cun
Uveal melanoma (UM) is an intractable disease with a low survival rates, despite adequate local treatment, as a result of its metastatic characteristics. Thus, new therapeutic strategies, including combinations of novel gene therapy and traditional chemotherapy, are under investigation to improve long-term prognosis. Dacarbazine or DTIC, an alkylating agent which results in DNA methylation, is most commonly used to treat melanoma but the response is very limited. The O6-methylguanine DNA methyl transferase (MGMT), a DNA repair protein, is involved in chemoresistance in DTIC treatment...
February 21, 2017: Cancer Biology & Therapy
https://www.readbyqxmd.com/read/28272283/dexamethasone-intravitreal-implant-vs-ranibizumab-in-the-treatment-of-macular-edema-secondary-to-brachytherapy-for-choroidal-melanoma
#6
Andrea Russo, Michele Reibaldi, Teresio Avitabile, Maurizio G Uva, Livio Marco Franco, Caterina Gagliano, Vincenza Bonfiglio, Corrado Spatola, Giuseppe Privitera, Antonio Longo
PURPOSE: To evaluate the efficacy of an intravitreal dexamethasone (Dex) implant 0.7 mg compared with intravitreal ranibizumab (Ra) for the treatment of radiation maculopathy with macular edema secondary to plaque brachytherapy in choroidal melanoma. METHODS: Eight patients were treated with intravitreal Ra, and eight patients received the Dex intravitreal implant. Visual acuity and foveal thickness were evaluated using spectral domain optical coherence tomography...
March 7, 2017: Retina
https://www.readbyqxmd.com/read/28267273/nf1-mutated-melanoma-tumors-harbor-distinct-clinical-and-biological-characteristics
#7
Helena Cirenajwis, Martin Lauss, Henrik Ekedahl, Therese Törngren, Anders Kvist, Lao H Saal, Håkan Olsson, Johan Staaf, Ana Carneiro, Christian Ingvar, Katja Harbst, Nicholas K Hayward, Göran Jönsson
In general, melanoma can be considered as a UV-driven disease with an aggressive metastatic course and high mutational load, with only few tumors (acral, mucosal and uveal melanomas) not induced by sunlight and possessing a lower mutational load. The most commonly activated pathway in melanoma is the mitogen-activated protein kinase (MAPK) pathway. However, the prognostic significance of mutational stratification is unclear and needs further investigation. Here, in silico we combined mutation data from 162 melanomas subjected to targeted deep sequencing with mutation data from three published studies...
March 7, 2017: Molecular Oncology
https://www.readbyqxmd.com/read/28260033/revealing-differential-modules-in-uveal-melanoma-by-analyzing-differential-networks
#8
Li Han, Cui Chen, Chang-Hui Liu, Min Zhang, Ling Liang
The aim of the present study was to investigate differential modules (DMs) between uveal melanoma (UM) and normal conditions by examining differential networks. Based on a gene expression profile collected from the ArrayExpress database, the inference of DMs involved three steps: The first step was construction of a differential co‑expression network (DCN); second, the module algorithm was adapted to identify the DMs presented in DCN; finally, the statistical significance of DMs were assessed based on the null score distribution of DMs generated using randomized networks...
February 22, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28257297/new-concepts-in-the-molecular-understanding-of-uveal-melanoma
#9
David Reichstein
PURPOSE OF REVIEW: Uveal melanoma is the most common primary intraocular malignancy, and its metastases are deadly. Significant work has been done to elucidate the molecular framework that causes uveal melanoma development and metastasis. This review is intended to highlight the most recent breakthroughs in the molecular understanding of uveal melanoma. RECENT FINDINGS: Monosomy of chromosome 3 and class 2 gene-expression profile ARE well-known INDICATORS of melanoma metastasis...
March 2, 2017: Current Opinion in Ophthalmology
https://www.readbyqxmd.com/read/28253717/pha665752-inhibits-the-hgf-stimulated-migration-and-invasion-of-cells-by-blocking-pi3k-akt-pathway-in-human-cell-line-uveal-melanoma
#10
Z Wang, C He, L Liu, N Ma, X Chen, D Zheng, G H Qiu
HGF/c-MET is frequently associated with tumor metastasis in many cancers, including uveal melanoma (UM). PHA665752, a selective c-MET inhibitor, exhibits anticancer activity through inhibiting cell motility in some cancers. In this study, we investigated the effects of PHA665752 on UM cell lines M17 and SP6.5. Our data show that HGF stimulated the motility of UM cells, and induced the activation of both c-MET and PI3K/AKT, but not ERK1/2. Moreover, consistent with the amount of c-MET within the nucleus, PHA665752 significantly inhibited HGF-promoted cell motility and suppressed the phosphorylation of c-MET and PI3K/AKT, but not ERK1/2 induced by HGF...
March 3, 2017: Neoplasma
https://www.readbyqxmd.com/read/28248732/the-role-of-mutation-rates-of-gnaq-or-gna11-in-cases-of-uveal-melanoma-in-japan
#11
Jun Ominato, Takeo Fukuchi, Ayako Sato, Naoyuki Yamaguchi, Kazue Kobayashi, Hiroyuki Cho, Tokuhide Oyama, Yoichi Ajioka
GNAQ and GNA11 mutations are thought to be important for the tumorigenesis of uveal melanoma. Although previous studies have reported on mutation rates in cases of uveal melanoma, presently, no such report for the Japanese population exists. In this study, we examined the frequency of GNAQ and GNA11 somatic mutations in cases of uveal melanoma in Japan and their relationship with clinicopathologic features or Ki-67-positive cell rates (Ki-67 labeling index: Ki-67 LI) using immunofluorescence methods. The study involved 19 cases of uveal melanoma...
February 28, 2017: Applied Immunohistochemistry & Molecular Morphology: AIMM
https://www.readbyqxmd.com/read/28247222/update-from-the-4th-edition-of-the-world-health-organization-classification-of-head-and-neck-tumours-mucosal-melanomas
#12
Michelle D Williams
The updated edition of The World Health Organization Classification of Tumours of the Head and Neck includes discussions on mucosal melanoma of both the sinonasal and oral cavity. Since the prior edition, sinonasal origin is now recognized as the most common site of occurrence of mucosal melanoma in the head and neck (66%) with oral cavity representing 25% of cases. Histologic features of mucosal melanomas vary widely from spindled, epithelioid, and pleomorphic to rhabdoid, plasmacytoid and undifferentiated...
March 2017: Head and Neck Pathology
https://www.readbyqxmd.com/read/28246385/zeb1-regulates-multiple-oncogenic-components-involved-in-uveal-melanoma-progression
#13
Yao Chen, Xiaoqin Lu, Diego E Montoya-Durango, Yu-Hua Liu, Kevin C Dean, Douglas S Darling, Henry J Kaplan, Douglas C Dean, Ling Gao, Yongqing Liu
Human uveal melanoma (UM) is a major ocular malignant tumor with high risk of metastasis and requires multiple oncogenic factors for progression. ZEB1 is a zinc finger E-box binding transcription factor known for participating epithelial-mesenchymal transition (EMT), a critical cellular event for metastasis of malignant tumors of epithelium origin. ZEB1 is also expressed in UM and high expression of ZEB1 correlates with UM advancement, but has little effect on cell morphology. We show that spindle UM cells can become epithelioid but not vice versa; and ZEB1 exerts its tumorigenic effects by promoting cell dedifferentiation, proliferation, invasiveness, and dissemination...
December 2017: Scientific Reports
https://www.readbyqxmd.com/read/28240745/the-biological-and-prognostic-significance-of-angiotropism-in-uveal-melanoma
#14
Raymond L Barnhill, Mengliang Ye, Aude Batistella, Marc-Henri Stern, Sergio Roman-Roman, Rémi Dendale, Olivier Lantz, Sophie Piperno-Neumann, Laurence Desjardins, Nathalie Cassoux, Claire Lugassy
Angiotropism is a marker of extravascular migration of melanoma cells along vascular and other structures and a prognostic factor in cutaneous melanoma. Because of this biological and prognostic importance in cutaneous melanoma, angiotropism was studied in uveal melanoma (UM). This retrospective study performed at a single ocular oncology referral center included 89 patients from the study period 2006-2008. All patients were diagnosed with UM from the choroid and/or ciliary body. All patients underwent enucleation for prognostic purposes and definitive therapy...
February 27, 2017: Laboratory Investigation; a Journal of Technical Methods and Pathology
https://www.readbyqxmd.com/read/28231293/photoacoustic-imaging-features-of-intraocular-tumors-retinoblastoma-and-uveal-melanoma
#15
Guan Xu, Yafang Xue, Zeynep Gürsel Özkurt, Naziha Slimani, Zizhong Hu, Xueding Wang, Kewen Xia, Teng Ma, Qifa Zhou, Hakan Demirci
The purpose of this study is to examine the capability of photoacoustic (PA) imaging (PAI) in assessing the unique molecular and architectural features in ocular tumors. A real-time PA and ultrasonography (US) parallel imaging system based on a research US platform was developed to examine retinoblastoma in mice in vivo and human retinoblastoma and uveal melanoma ex vivo. PA signals were generated by optical illumination at 720, 750, 800, 850, 900 and 950 nm delivered through a fiber optical bundle. The optical absorption spectra of the tumors were derived from the PA images...
2017: PloS One
https://www.readbyqxmd.com/read/28230715/a-multireferral-centre-retrospective-cohort-analysis-on-the-experience-in-treatment-of-metastatic-uveal-melanoma-and-utilization-of-sequential-liver-directed-treatment-and-immunotherapy
#16
Malinda Itchins, Paolo A Ascierto, Alexander M Menzies, Meredith Oatley, Serigne Lo, Dariush Douraghi-Zadeh, Timmothy Harrington, Richard Maher, Antonio M Grimaldi, Alexander Guminski
Metastatic uveal melanoma is a rare malignancy with a poor prognosis. To date, systemic therapy has been ineffective; however, there are few data on the benefits of anti-CTLA4 or anti-PD-1 antibodies in sequence with liver-directed therapy. A retrospective cohort analysis was carried out on 37 consecutive patients managed in a tertiary referral centre examining the safety and efficacy of treatment; patterns of care; and impact on survival. The sequential treatment with transarterial chemotherapy (TAC), systemic immunotherapy (IT) and systemic chemotherapy was reviewed...
February 22, 2017: Melanoma Research
https://www.readbyqxmd.com/read/28229253/the-biology-of-uveal-melanoma
#17
Adriana Amaro, Rosaria Gangemi, Francesca Piaggio, Giovanna Angelini, Gaia Barisione, Silvano Ferrini, Ulrich Pfeffer
Uveal melanoma (UM), a rare cancer of the eye, is distinct from cutaneous melanoma by its etiology, the mutation frequency and profile, and its clinical behavior including resistance to targeted therapy and immune checkpoint blockers. Primary disease is efficiently controlled by surgery or radiation therapy, but about half of UMs develop distant metastasis mostly to the liver. Survival of patients with metastasis is below 1 year and has not improved in decades. Recent years have brought a deep understanding of UM biology characterized by initiating mutations in the G proteins GNAQ and GNA11...
February 22, 2017: Cancer Metastasis Reviews
https://www.readbyqxmd.com/read/28228113/validation-of-an-ngs-mutation-detection-panel-for-melanoma
#18
Anne Reiman, Hugh Kikuchi, Daniela Scocchia, Peter Smith, Yee Wah Tsang, David Snead, Ian A Cree
BACKGROUND: Knowledge of the genotype of melanoma is important to guide patient management. Identification of mutations in BRAF and c-KIT lead directly to targeted treatment, but it is also helpful to know if there are driver oncogene mutations in NRAS, GNAQ or GNA11 as these patients may benefit from alternative strategies such as immunotherapy. METHODS: While polymerase chain reaction (PCR) methods are often used to detect BRAF mutations, next generation sequencing (NGS) is able to determine all of the necessary information on several genes at once, with potential advantages in turnaround time...
February 22, 2017: BMC Cancer
https://www.readbyqxmd.com/read/28223438/dysregulated-gpcr-signaling-and-therapeutic-options-in-uveal-melanoma
#19
Vivian Chua, Dominic Lapadula, Clinita Randolph, Jeffrey L Benovic, Philip Wedegaertner, Andrew E Aplin
Uveal melanoma (UM) is the most common primary intraocular malignant tumor in adults and arises from the transformation of melanocytes in the uveal tract. Even after treatment of the primary tumor, up to 50% of patients succumb to metastatic disease. The liver is the predominant organ of metastasis. There is an important need to provide effective treatment options for advanced stage UM. In order to provide the preclinical basis for new treatments, it is important to understand the molecular underpinnings of the disease...
February 21, 2017: Molecular Cancer Research: MCR
https://www.readbyqxmd.com/read/28218368/intravitreal-dexamethasone-implant-ozurdex%C3%A2-for-exudative-retinal-detachment-after-proton-beam-therapy-for-choroidal-melanoma
#20
Ariane Malclès, Anh-Minh Nguyen, Thibaud Mathis, Jean-Daniel Grange, Laurent Kodjikian
PURPOSE: To evaluate the efficacy and safety of intravitreal 0.7-mg dexamethasone implant (DEX-I) (Ozurdex®) in the treatment of extensive exudative retinal detachment (RD) associated with uveal melanoma treated using proton beam therapy (PBT). METHODS: Data from 10 patients with exudative RD after PBT treated with intravitreal injection of 0.7-mg DEX-I were reviewed retrospectively. The main outcome measures were resolution of exudative RD, visual acuity, and safety profile...
February 8, 2017: European Journal of Ophthalmology
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