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https://www.readbyqxmd.com/read/29332062/cytologic-features-of-malignant-melanoma-with-osteoclast-like-giant-cells
#1
José A Jiménez-Heffernan, Magdalena Adrados, Patricia Muñoz-Hernández, Paloma Fernández-Rico, Ana I Ballesteros-García, Javier Fraga
BACKGROUND: Malignant melanoma showing numerous osteoclast-like giant cells (OGCs) is an uncommon morphologic phenomenon, rarely mentioned in the cytologic literature. The few reported cases seem to have an aggressive clinical behavior. Although most findings support monocyte/macrophage differentiation, the exact nature of OGCs is not clear. CASE: A 57-year-old woman presented with an inguinal lymphadenopathy. Sixteen years before, cutaneous malignant melanoma of the lower limb had been excised...
January 13, 2018: Acta Cytologica
https://www.readbyqxmd.com/read/29331323/regulation-of-inflammatory-factors-by-double-stranded-rna-receptors-in-breast-cancer-cells
#2
Amritha Venkatesh, Harika Nandigam, Maria Muccioli, Manindra Singh, Tiffany Loftus, Deana Lewis, Michelle Pate, Fabian Benencia
Malignant cells are not the only components of a tumor mass since other cells (e.g., fibroblasts, infiltrating leukocytes and endothelial cells) are also part of it. In combination with the extracellular matrix, all these cells constitute the tumor microenvironment. In the last decade the role of the tumor microenvironment in cancer progression has gained increased attention and prompted efforts directed to abrogate its deleterious effects on anti-cancer therapies. The immune system can detect and attack tumor cells, and tumor-infiltrating lymphocytes (particularly CD8 T cells) have been associated with improved survival or better response to therapies in colorectal, melanoma, breast, prostate and ovarian cancer patients among others...
November 22, 2017: Immunobiology
https://www.readbyqxmd.com/read/29331035/noninvasive-optical-spectroscopy-for-identification-of-non-melanoma-skin-cancer-pilot-study
#3
David J Carpenter, Mirabelle B Sajisevi, Nikita Chapurin, Clifford Scott Brown, Tracy Cheng, Gregory M Palmer, Daniel S Stevenson, Caroline L Rao, Russell P Hall, Charles R Woodard
OBJECTIVE: Optical spectroscopy offers a noninvasive alternative to biopsy as a first-line screening tool for suspicious skin lesions. This study sought to define several optical parameters across malignant and benign tissue types. STUDY DESIGN: Prospective pilot trial utilizing the Zenalux IM1 optical spectroscopy device from April 2016 to February 2017. For each skin lesion, provider pre-biopsy probability of malignancy was compared to histolopathologic diagnosis...
January 13, 2018: Lasers in Surgery and Medicine
https://www.readbyqxmd.com/read/29330502/targeting-insulin-like-growth-factor-i-and-extracellular-matrix-interactions-in-melanoma-progression
#4
Berline Murekatete, Ali Shokoohmand, Jacqui McGovern, Lipsa Mohanty, Christoph Meinert, Brett G Hollier, Alfred Zippelius, Zee Upton, Abhishek S Kashyap
Insulin-like growth factor (IGF)-I binds to the ECM protein vitronectin (VN) through IGF binding proteins (IGFBPs) to enhance proliferation and migration of skin keratinocytes and fibroblasts. Although evidence exists for the role of individual components of the complex (IGF-I, IGFBP-3 and VN), the cellular functions stimulated by these proteins together as a complex remains un-investigated in melanoma cells. We report here that the IGF-I:IGFBP-3:VN trimeric complex stimulates a dose-dependent increase in the proliferation and migration of WM35 and Sk-MEL28 melanoma cells...
January 12, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29330295/epigenetic-reprogramming-of-pericentromeric-satellite-dna-in-premalignant-and-malignant-lesions
#5
Nadine H Brueckmann, Christina B Pedersen, Henrik J Ditzel, Morten F Gjerstorff
Repression of repetitive DNA is important for maintaining genomic stability, but is often perturbed in cancer. For instance, the megabase satellite domain at chromosome 1q12 is a common site of genetic rearrangements, such as translocations and deletions. Polycomb-group (PcG) proteins can be observed as large subnuclear domains called polycomb bodies, the composition and cellular function of which has remained elusive. This study, demonstrates that polycomb bodies are canonical subunits of the multiprotein polycomb repressive complex 1 (PRC1) deposited on 1q12 pericentromeric satellite DNA, which are normally maintained as constitutive heterochromatin by other mechanisms...
January 12, 2018: Molecular Cancer Research: MCR
https://www.readbyqxmd.com/read/29325590/dynamic-changes-in-18f-borono-l-phenylalanine-uptake-in-unresectable-advanced-or-recurrent-squamous-cell-carcinoma-of-the-head-and-neck-and-malignant-melanoma-during-boron-neutron-capture-therapy-patient-selection
#6
Takahiro Morita, Hiroaki Kurihara, Kenta Hiroi, Natsuki Honda, Hiroshi Igaki, Jun Hatazawa, Yasuaki Arai, Jun Itami
BACKGROUND: We evaluated dynamic changes in 18F-borono-L-phenylalanine (18F-BPA) uptake in unresectable, advanced, or recurrent squamous cell carcinoma of the head and neck (SCC) and malignant melanoma (MM) during boron neutron capture therapy (BNCT) patient selection. METHODS: Dynamic changes in the maximum standardized uptake value (SUVmax), tumor-to-normal tissue ratio (TNR), and tumor-to-blood pool ratio (TBR) for 18F-BPA were evaluated in 20 patients with SCC and 8 patients with MM...
January 11, 2018: Radiation Oncology
https://www.readbyqxmd.com/read/29322826/evaluation-of-the-eighth-american-joint-committee-on-cancer-staging-system-for-malignant-melanoma-of-the-skin
#7
Omar Abdel-Rahman
AIM: To validate the changes among the American Joint Committee on Cancer (AJCC) eighth staging system for cutaneous melanoma. METHODOLOGY: Surveillance, Epidemiology and End Results database (2004-2014) was queried. Kaplan-Meier survival estimates were evaluated according to both AJCC seventh and eighth systems. RESULTS: Overall survival was assessed according to the two editions and p-values for overall trend were significant (p < 0...
January 11, 2018: Future Oncology
https://www.readbyqxmd.com/read/29322606/association-of-tumour-infiltrating-regulatory-t-cells-with-adverse-outcomes-in-dogs-with-malignant-tumours
#8
K Sakai, S Maeda, Y Yamada, J K Chambers, K Uchida, H Nakayama, T Yonezawa, N Matsuki
Regulatory T cells (Tregs) infiltrate into a variety of tumour tissues and associate with poor prognosis in humans. However, data on association of Treg infiltration with prognosis is limited in canine tumours. The purpose of this study was to examine the number of tumour-infiltrating Tregs and its association with overall survival (OS) in dogs with malignant tumours. The following 168 canine tumours were included: 37 oral malignant melanomas (OMMs); 14 oral squamous cell carcinomas (OSCCs); 16 pulmonary adenocarcinomas (PAs); 37 mammary carcinomas (MCs); 36 mast cell tumours (MCTs) and 28 hepatocellular carcinomas (HCCs)...
January 11, 2018: Veterinary and Comparative Oncology
https://www.readbyqxmd.com/read/29320405/effect-of-shrna-mediated-silencing-of-yb-1-protein-on-the-expression-of-matrix-collagenases-in-malignant-melanoma-cell-in-vitro
#9
Wisam Nabeel Ibrahim, Abd Almonem Doolaanea, Mohammad Syaiful Bahari Bin Abdull Rasad
Background and Objective: YB-1 is a transcription and oncogenic factor capable of binding to DNA and RNA performing versatile functions within normal and cancer cells. Some studies reported the binding of YB-1 with a collagenases gene promoter and influencing their expression. In addition, the role of YB-1 in malignant melanoma was not elucidated. Thus, in this study, the aim was to knock down the expression of YB-1 in A375 malignant melanoma cancer cell using the shRNA approach and study its effect on cancer cell proliferation, migration, and expression of collagenases...
January 10, 2018: Cells
https://www.readbyqxmd.com/read/29319729/effects-of-nivolumab-in-peritoneal-carcinamatosis-of-malign-melanoma-in-mouse-model
#10
Ozgul Duzgun, Inanc Samil Sarici, Serkan Gokcay, Kivilcim Eren Ates, Mehmet Bertan Yılmaz
PURPOSE: To evaluate the efficacy of nivolumab and comparison with dacarbazine (DTIC) on peritoneal carcinomatosis of malignant melanoma in mouse model. METHODS: Mouse skin melanoma cells was injected under the capsule of the peritoneal surface in the left side of the abdomen. On postoperative day ten, mouses randomised into three groups. Group 1: Control, Group 2: HIPEC (Hyperthermic intraperitoneal chemotherapy) with DTIC and Group 3: HIPEC with Nivolumab. After the sacrification on postoperative day fifteen, peritoneum evaluated macroscopically and histopathologically by using peritoneal regression grading score (PRGS)...
December 2017: Acta Cirúrgica Brasileira
https://www.readbyqxmd.com/read/29319640/orbital-extranodal-marginal-zone-lymphoma-following-radiotherapy-a-report-of-2-cases
#11
Zujaja Tauqeer, Frederick A Jakobiec, Suzanne K Freitag, Michael K Yoon, Natalie Wolkow
PURPOSE: To present 2 patients in whom orbital radiation preceded the development of periorbital extranodal marginal zone lymphoma by more than a decade and to investigate the likelihood of this representing irradiation-induced malignancy. METHODS: Retrospective chart review and histopathologic study with immunohistochemistry of 2 cases. RESULTS: The first patient was a 58-year-old woman who developed an orbital mass within the vicinity of the lateral rectus muscle 17 years after external beam proton radiation therapy for an inferotemporal choroidal melanoma...
January 9, 2018: Ophthalmic Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/29318547/analysis-of-enzymatic-activity-of-matrix-metalloproteinase-mmp-by-collagen-zymography-in-melanoma
#12
Vijay Walia, Yardena Samuels
Protein zymography is the most commonly used technique to study the enzymatic activity of matrix metalloproteinases (MMPs) and their inhibitors. MMPs are proteolytic enzymes that promote extracellular matrix degradation. MMPs are frequently mutated in malignant melanomas as well as other cancers and are linked to increasing incidence of tumor metastasis. Substrate zymography characterizes MMP activity by their ability to degrade preferred substrates. Here we describe the collagen zymography technique to measure the active or latent form of MMPs using MMP-8 as an example, which is a frequently mutated MMP family member in malignant melanomas...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29317166/synthesis-in-vitro-antimalarial-activities-and-cytotoxicities-of-amino-artemisinin-ferrocene-derivatives
#13
Christo de Lange, Dina Coertzen, Frans J Smit, Johannes F Wentzel, Ho Ning Wong, Lyn-Marie Birkholtz, Richard K Haynes, David D N'Da
Novel derivatives bearing a ferrocene attached via a piperazine linker to C-10 of the artemisinin nucleus were prepared from dihydroartemisinin and screened against chloroquine (CQ) sensitive NF54 and CQ resistant K1 and W2 strains of Plasmodium falciparum (Pf) parasites. The overall aim is to imprint oxidant (from the artemisinin) and redox (from the ferrocene) activities. In a preliminary assessment, these compounds were shown to possess activities in the low nM range with the most active being compound 6 with IC50 values of 2...
December 26, 2017: Bioorganic & Medicinal Chemistry Letters
https://www.readbyqxmd.com/read/29316943/are-prognostic-indices-for-brain-metastases-of-melanoma-still-valid-in-the-stereotactic-era
#14
Harun Badakhshi, Fidelis Engeling, Volker Budach, Pirus Ghadjar, Sebastian Zschaeck, David Kaul
BACKGROUND: Malignant melanoma brain metastases (MBM) are the third most common cause for brain metastases (BM). Historically Whole-brain radiotherapy (WBRT) was considered the goldstandard of treatment even though melanoma cells are regarded as very radioresistant. Therapeutic possibilities have fundamentally changed since the availability of stereotactic radiotherapy (SRT), where it is possible to apply high ablative doses in a very precise manner. In this work we analyze prognostic factors of overall survival (OS) after SRT in patients with MBM and evaluate the applicability of popular prognostic indices that mainly stem from the WBRT-era...
January 10, 2018: Radiation Oncology
https://www.readbyqxmd.com/read/29316537/picolyl-amides-of-betulinic-acid-as-antitumor-agents-causing-tumor-cell-apoptosis
#15
Uladzimir Bildziukevich, Lucie Rárová, David Šaman, Zdeněk Wimmer
A series of picolyl amides of betulinic acid (3a-3c and 6a-6c) was prepared and subjected to the cytotoxicity screening tests. Structure-activity relationships studies resulted in finding differences in biological activity in dependence on o-, m- and p-substitution of the pyridine ring in the target amides, when cytotoxicity data of 3a-3c and 6a-6c were obtained and compared. The amides 3b and 3a displayed cytotoxicity (given in the IC50 values) in G-361 (0.5 ± 0.1 μM and 2.4 ± 0.0 μM, respectively), MCF7 (1...
January 4, 2018: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/29315912/unmet-supportive-care-needs-health-status-and-minimum-costs-in-survivors-of-malignant-melanoma
#16
L M Davies, K P Hayhurst, P Lorigan, A Molassiotis
We explored the relationship between unmet care needs, health status, health utility and costs in people treated for melanoma via a cross-sectional follow-up survey (N = 455) 3 months to 5 years after complete resection of stage I-III cutaneous malignant melanoma. 51% (n = 232) had unmet care needs. This group had higher mean resource use, estimated conservatively (£28 vs. £10 per person) and worse overall health. Mean health-related utility index (AQoL6D) was 0.763 (95% CI 0.74; 0.79) in those with self-reported unmet need vs...
January 9, 2018: European Journal of Cancer Care
https://www.readbyqxmd.com/read/29314288/the-limitations-of-dermoscopy-false-positive-and-false-negative-tumors
#17
REVIEW
V Papageorgiou, Z Apalla, E Sotiriou, C Papageorgiou, E Lazaridou, S Vakirlis, D Ioannides, A Lallas
Dermoscopy has been documented to increase the diagnostic accuracy of clinicians evaluating skin tumors, improving their ability to detect skin cancer and better recognize benign moles. However, dermoscopically "false positive" and "false negative" tumors do exist. False positive diagnosis usually leads to unnecessary excisions. False negative diagnosis is much more dangerous, since it might result in overlooking a cancer, with severe undesirable consequences for the patient and the physician. Therefore, management strategies should mainly focus on addressing the risk of dermoscopically false negative tumors...
January 5, 2018: Journal of the European Academy of Dermatology and Venereology: JEADV
https://www.readbyqxmd.com/read/29314070/diagnostic-reliability-of-pretreatment-biopsy-in-malignant-nasoethmoidal-tumors-a-retrospective-study-of-77-cases
#18
Alberto Schreiber, Vittorio Rampinelli, Marco Ferrari, Davide Mattavelli, Davide Farina, Simonetta Battocchio, Piero Nicolai
OBJECTIVES/HYPOTHESIS: Pretreatment biopsy is crucial in histology-based management of malignant nasoethmoidal tumors, because misdiagnosis can lead to inadequate therapeutic planning. Factors influencing the reliability of biopsy were retrospectively investigated in a tertiary referral center. STUDY DESIGN: Retrospective case series. METHODS: All patients who underwent biopsy, staging magnetic resonance, surgery, and histologic diagnosis for nasoethmoidal tumors in our hospital were retrospectively evaluated...
January 4, 2018: Laryngoscope
https://www.readbyqxmd.com/read/29313974/genetic-variants-in-rora-and-dnmt1-associated-with-cutaneous-melanoma-survival
#19
Bo Li, Yanru Wang, Yinghui Xu, Hongliang Liu, Wendy Bloomer, Dakai Zhu, Christopher I Amos, Shenying Fang, Jeffrey E Lee, Xin Li, Jiali Han, Qingyi Wei
Cutaneous melanoma (CM) is considered as a steroid hormone-related malignancy. However, few studies have evaluated the roles of genetic variants encoding steroid hormone receptor genes and their related regulators (SHR-related genes) in CM-specific survival (CMSS). Here, we performed a pathway-based analysis to evaluate genetic variants of 191 SHR-related genes in 858 CMSS patients using a dataset from a genome-wide association study (GWAS) from The University of Texas MD Anderson Cancer Center (MDACC), and then validated the results in an additional dataset of 409 patients from the Harvard GWAS...
January 4, 2018: International Journal of Cancer. Journal International du Cancer
https://www.readbyqxmd.com/read/29313397/detection-of-extrascleral-extension-in-uveal-melanoma-with-histopathological-correlation
#20
Christopher K H Burris, Vasilios P Papastefanou, Caroline Thaung, Marie Restori, Amit K Arora, Mandeep S Sagoo, Victoria M L Cohen
PURPOSE: Uveal melanoma is the most common primary intraocular malignancy. Extrascleral extension (ESE) is rare, but associated with an increased rate of orbital recurrence and an overall poor prognosis. Clinical studies show low rates when compared with histological studies. Due to the prognostic importance of ESE, we sought to compare our clinical, intraoperative, and histological detection rates. DESIGN: A retrospective cross-sectional case series. METHODS: A list of eyes enucleated for uveal melanoma was compiled from the admissions records of the London Ocular Oncology Service during the 28-month period, i...
January 9, 2018: Orbit
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