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https://www.readbyqxmd.com/read/29774387/ultraviolet-radiation-induces-melan-a-expressing-cells-in-interfollicular-epidermis-in-wild-type-mice
#1
David A De Luca, Barbara Sterniczky, Susanne Kimeswenger, Dagmar Födinger, Agatha Schwarz, Thomas Schwarz, Christian Jantschitsch
Adult wild-type mice are not supposed to be proper models for ultraviolet radiation (UVR)-induced melanoma since melanocytes are confined to hair follicles and cannot be sufficiently reached by UVR. On the other hand, in mutated mouse models used for melanoma research limitations, including an altered immune system and selection of affected pathways, lead to tumors phenotypically quite different from naturally occurring melanomas. We compared the distribution of epidermal melanocytes in UVR and not-UVR-exposed wild-type C57BL/6 mice...
May 17, 2018: Archives of Dermatological Research
https://www.readbyqxmd.com/read/29755733/recent-advancements-in-the-management-of-retinoblastoma-and-uveal-melanoma
#2
REVIEW
Amy C Schefler, Ryan S Kim
Retinoblastoma and uveal melanoma are the most common intraocular malignancies observed in pediatric and adult populations, respectively. For retinoblastoma, intra-arterial chemotherapy has dramatically improved treatment outcomes and eye salvage rates compared with traditional salvage rates of systemic chemotherapy and external beam radiation therapy. Intravitreal injections of chemotherapy have also demonstrated excellent efficacy for vitreous seeds. Uveal melanoma, on the other hand, is treated predominantly with iodine-125 plaque brachytherapy or with proton beam therapy...
2018: F1000Research
https://www.readbyqxmd.com/read/29752121/self-assembled-nanomicelles-of-amphiphilic-clotrimazole-glycyl-glycine-analogue-augmented-drug-delivery-apoptosis-and-restrained-melanoma-tumour-progression
#3
Amanpreet Kaur, Kiran Jyoti, Ashish Baldi, Upendra Kumar Jain, Ramesh Chandra, Jitender Madan
In present investigation, self-assembled nanomicelles of amphiphilic clotrimazole glycyl-glycine (CLT-GG-SANMs) analogue were customized for augmenting drug delivery, permeability and apoptosis in B16F1 mouse melanoma cancer cells both in vitro and in vivo following intratumoral (i.t.) route of administration. The mean particle size of CLT-GG-SANMs was measured to be 35.9 ± 3.4 nm in addition to zeta-potential of -17.1 ± 3.5 mV. The shape of CLT-GG-SANMs was visualized to be smooth and spherical as like nanoparticles...
August 1, 2018: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/29742454/the-pivotal-role-of-angiogenesis-in-a-multi-scale-modeling-of-tumor-growth-exhibiting-the-avascular-and-vascular-phases
#4
Hooman Salavati, M Soltani, Saeid Amanpour
The mechanisms involved in tumor growth mainly occur at the microenvironment, where the interactions between the intracellular, intercellular and extracellular scales mediate the dynamics of tumor. In this work, we present a multi-scale model of solid tumor dynamics to simulate the avascular and vascular growth as well as tumor-induced angiogenesis. The extracellular and intercellular scales are modeled using partial differential equations and cellular Potts model, respectively. Also, few biochemical and biophysical rules control the dynamics of intracellular level...
May 6, 2018: Microvascular Research
https://www.readbyqxmd.com/read/29736794/quality-readability-and-understandability-of-german-booklets-addressing-melanoma-patients
#5
Julia Brütting, Lydia Reinhardt, Maike Bergmann, Dirk Schadendorf, Christiane Weber, Wolfgang Tilgen, Carola Berking, Friedegund Meier
Booklets are the preferably used form among patient education materials and are often handed out during medical consultations in dermatological oncology settings. However, little is known about how beneficial they are and whether they correspond to essential quality characteristics. To assess the quality, readability, and understandability of currently freely available booklets written in German addressing melanoma patients (MP). Melanoma booklets in accordance with predefined criteria were searched and analyzed...
May 7, 2018: Journal of Cancer Education: the Official Journal of the American Association for Cancer Education
https://www.readbyqxmd.com/read/29733465/vascular-morphology-in-normal-skin-studied-with-dynamic-optical-coherence-tomography
#6
Pernille Lindsø Andersen, Jonas Olsen, Kersti Brosbøl Engelund Friis, Lotte Themstrup, Kasper Grandahl, Ole Steen Mortensen, Gregor Borut Ernst Jemec
BACKGROUND: Dynamic optical coherence tomography (D-OCT) is a non-invasive imaging technique, suitable for the study of structural and dynamic features of cutaneous microvasculature. Studies with D-OCT have primarily focused on non-melanoma skin cancer (NMSC) and a reference description of healthy skin is lacking. OBJECTIVE: To describe the prevalence of standard microvascular features in normal skin. METHOD: A total of 280 participants without skin disease were D-OCT scanned on four body locations; three sun-exposed areas and one unexposed: forehead, back of the neck, back of the hand and medial side of the upper arm...
May 7, 2018: Experimental Dermatology
https://www.readbyqxmd.com/read/29695547/an-improved-in-vivo-methodology-to-visualise-tumour-induced-changes-in-vasculature-using-the-chick-chorionic-allantoic-membrane-assay
#7
Naside Mangir, Ahtasham Raza, John W Haycock, Christopher Chapple, Sheila Macneil
BACKGROUND/AIM: Decreasing the vascularity of a tumour has proven to be an effective strategy to suppress tumour growth and metastasis. Anti-angiogenic therapies have revolutionized the treatment of advanced-stage cancers, however there is still demand for further improvement. This necessitates new experimental models that will allow researchers to reliably study aspects of angiogenesis. The aim of this study was to demonstrate an in vivo technique in which the highly vascular and accessible chorioallantoic membrane (CAM) of the chick embryo is used to study tumour-induced changes in the macro and microvessels...
May 2018: In Vivo
https://www.readbyqxmd.com/read/29663897/computational-study-of-imidazolylporphyrin-derivatives-as-a-radiopharmaceutical-ligand-kit-for-melanoma
#8
Fransiska Kurniawan, Rahmana E Kartasasmita, Naoki Yoshioka, Abdul Mutalib, Daryono H Tjahjono
Melanoma is the most aggressive type of skin cancer. Metastatic melanoma is extremely difficult to treat with current therapy methods such as surgery. On the other hand, it is a good opportunity to develop a radiopharmaceutical using a radionuclide such as technetium (Tc) for diagnostic and rhenium (Re) for therapeutic purposes. T3,4BCPP has been be used as a radioimaging agent for melanoma cancers experimentally. The aim of the present research was to design new imidazolylporphyrin derivatives with better selectivity and higher affinity than those of T3,4BCPP by molecular modeling...
April 16, 2018: Current Computer-aided Drug Design
https://www.readbyqxmd.com/read/29599670/dermoscopic-assessment-of-skin-toxicities-in-patients-with-melanoma-during-treatment-with-vemurafenib
#9
Marcin Rajczykowski, Grazyna Kaminska-Winciorek, Elzbieta Nowara, Marzenna Samborska-Plewicka, Sebastian Giebel
Introduction: The use of vemurafenib in melanoma has improved the survival of patients; however, it is associated with skin toxicities. Aim: To assess skin toxicities by dermoscopy in patients treated with vemurafenib. Material and methods: Eight patients with BRAF V600 mutation positive metastatic melanoma were examined dermoscopically during vemurafenib treatment. All skin lesions occurring during therapy were assessed clinically and dermoscopically using a hand-held dermoscope with polarised and non-polarised light...
February 2018: Postȩpy Dermatologii i Alergologii
https://www.readbyqxmd.com/read/29596557/by-sleight-of-hand-prognosis-determined-even-for-small-choroidal-melanoma
#10
Carol L Shields, Arman Mashayekhi, Jerry A Shields
No abstract text is available yet for this article.
March 29, 2018: JAMA Ophthalmology
https://www.readbyqxmd.com/read/29579372/remitting-seronegative-symmetrical-synovitis-with-pitting-edema-rs3pe-associated-with-partial-melanoma-response-under-anti-ctla-4-and-anti-pd-1-combination
#11
Mona Amini-Adle, Muriel Piperno, Jérémie Tordo, Valérie Dubois, Aurélien Marabelle, Luc Thomas, Stéphane Dalle
The patient, a-70-year-old male developed severe inflammatory polyarthritis associated with diffuse pitting edema in the hands and feet (A) six weeks after the initiation of ipilimumab and nivolumab for a heavily metastatic melanoma (B). Synovitis was present in wrists, metacarpophalangeal, and proximal interphalangeal joints. C-reactive protein level was elevated (169 comparing to 7 before immunotherapy introduction). This article is protected by copyright. All rights reserved.
March 26, 2018: Arthritis & Rheumatology
https://www.readbyqxmd.com/read/29578129/dna-methylation-and-uveal-melanoma
#12
REVIEW
Zhi-Kun Yang, Jing-Yun Yang, Zhuo-Zai Xu, Wei-Hong Yu
Objective: The objective of the study was to summarize the role of DNA methylation in the development and metastasis of uveal melanoma (UM). Data Sources: The relevant studies in MEDLINE were searched. Study Selection: In this review, we performed a comprehensive literature search in MEDLINE using "uveal melanoma" AND ("DNA methylation" OR "epigenetics") for original research/review articles published before February 2018 on the relationship between DNA methylation and UM...
April 5, 2018: Chinese Medical Journal
https://www.readbyqxmd.com/read/29558744/the-angiotensin-ii-type-1-receptor-antagonist-losartan-affects-nhe1-dependent-melanoma-cell-behavior
#13
Daniel Navin Olschewski, Verena Hofschröer, Nikolaj Nielsen, Daniela G Seidler, Albrecht Schwab, Christian Stock
BACKGROUND/AIMS: The peptide hormone angiotensin II (ATII) plays a prominent role in regulating vasoconstriction and blood pressure. Its primary target is the angiotensin II receptor type 1 (AT1), the stimulation of which induces an increase in cytosolic [Ca2+] and calmodulin activation. Ca2+-bound (activated) calmodulin stimulates the activity of the Na+/ H+ exchanger isoform 1 (NHE1); and increased NHE1 activity is known to promote melanoma cell motility. The competitive AT1 receptor inhibitor losartan is often used to lower blood pressure in hypertensive patients...
March 16, 2018: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/29534593/neurotropism-as-a-prognostic-factor-in-cutaneous-melanoma-patients
#14
F Tas, K Erturk
Neurotropism is a feature that is encountered rarely in melanoma and is considered to be associated with increased risk of local recurrence. However, its prognostic significance still remains controversial. The objective of this study was to deter- mine the clinical significance of neurotropism in cutaneous melanoma patients. A total of 519 cutaneous melanoma patients were enrolled into this study and their data were analyzed in a retrospective fashion. The melanomas without neurotro- pism (n=496; 95.6%) were larger in number than those with neurotropism (n=23; 4...
2018: Neoplasma
https://www.readbyqxmd.com/read/29515401/successful-treatment-of-nivolumab-resistant-multiple-in-transit-melanomas-with-ipilimumab-and-topical-imiquimod
#15
Taku Fujimura, Yumi Kambayashi, Yota Sato, Kayo Tanita, Sadanori Furudate, Akira Tsukada, Hisayuki Tono, Akira Hashimoto, Setsuya Aiba
Simultaneous or sequential, planned administration of ipilimumab could significantly enhance the antitumor effects of nivolumab in advanced melanoma patients. On the other hand, the efficacy of ipilimumab for nivolumab-resistant advanced melanoma is extremely poor. Therefore, additional supportive therapy for anti-PD-1 antibody therapy-resistant advanced melanoma has been widely investigated. In this report, we describe a case of multiple in-transit melanomas developing in a nivolumab-resistant patient successfully treated with ipilimumab in combination with imiquimod...
January 2018: Case Reports in Oncology
https://www.readbyqxmd.com/read/29513718/acral-melanoma-detection-using-a-convolutional-neural-network-for-dermoscopy-images
#16
Chanki Yu, Sejung Yang, Wonoh Kim, Jinwoong Jung, Kee-Yang Chung, Sang Wook Lee, Byungho Oh
BACKGROUND/PURPOSE: Acral melanoma is the most common type of melanoma in Asians, and usually results in a poor prognosis due to late diagnosis. We applied a convolutional neural network to dermoscopy images of acral melanoma and benign nevi on the hands and feet and evaluated its usefulness for the early diagnosis of these conditions. METHODS: A total of 724 dermoscopy images comprising acral melanoma (350 images from 81 patients) and benign nevi (374 images from 194 patients), and confirmed by histopathological examination, were analyzed in this study...
2018: PloS One
https://www.readbyqxmd.com/read/29507555/the-incidence-and-management-of-cutaneous-adverse-events-of-the-epidermal-growth-factor-receptor-inhibitors
#17
REVIEW
Witold Owczarek, Monika Słowińska, Aleksandra Lesiak, Magdalena Ciążyńska, Aldona Maciąg, Elwira Paluchowska, Luiza Marek-Józefowicz, Rafał Czajkowski
Overexpression of the epidermal growth factor receptor (EGFR) is found in many cancers, including those of the head and neck area, non-small-cell lung cancer, and colorectal, cervical, prostate, breast, ovary, stomach, and pancreatic cancer. The EGFR inhibitors are used at present in the treatment of such cancers. Skin lesions that develop during and after cancer treatment may be due to specific cytostatics, molecular-targeted drugs, radiation therapy, complementary therapy, or the cancer itself, and hence knowledge is essential to distinguish between them...
October 2017: Postȩpy Dermatologii i Alergologii
https://www.readbyqxmd.com/read/29502116/dermoscopy-improves-the-diagnostic-accuracy-of-melanomas-clinically-resembling-seborrheic-keratosis-cross-sectional-study-of-the-ability-to-detect-seborrheic-keratosis-like-melanomas-by-a-group-of-dermatologists-with-varying-degrees-of-experience
#18
Cristina Carrera, Sonia Segura, Paula Aguilera, Carol Midori Takigami, Antonio Gomes, Alicia Barreiro, Massimiliano Scalvenzi, Caterina Longo, Stefano Cavicchini, Luc Thomas, Josep Malvehy, Susana Puig, Iris Zalaudek
BACKGROUND: Malignant melanomas mimicking seborrheic keratosis (SK-like MMs) carry the risk of delayed diagnosis and inadequate treatment. The value of dermoscopy to improve the correct detection of these mimickers has not been previously studied. OBJECTIVE: To evaluate the diagnostic accuracy of clinically SK-like MMs with and without dermoscopy. METHODS: Clinical and dermoscopic images of histopathologically proven SK-like MMs (n = 134) intermingled with other melanomas and benign tumors were randomly presented to clinicians with different levels of experience, blinded to the diagnosis and goal of the study...
2017: Dermatology: International Journal for Clinical and Investigative Dermatology
https://www.readbyqxmd.com/read/29491614/cutaneous-horn-a-mask-to-underlying-malignancy
#19
Rashmi Gs Phulari, Rajendrasinh Rathore, Trupti Pramod Talegaon, Arpan Shah
Cutaneous horns ( cornu cutaneum ) are uncommon lesions consisting of keratotic material resembling that of an animal horn. It is a conical- or cylindrical-shaped excessive hyperkeratosis of variable size ranging from few millimeters to several centimeters with a variable in size and shape, such as cylindrical, conical, pointed, transversely or longitudinally corrugated, or curved like a ram's horn. The lesions typically occur in sun-exposed areas, particularly the face, ear, nose, forearms and dorsum of hands...
January 2018: Journal of Oral and Maxillofacial Pathology: JOMFP
https://www.readbyqxmd.com/read/29484003/another-case-of-interdigital-located-metastasing-hematoma
#20
Georgi Tchernev, Ivan Pidakev, Anastasiya Atanasova Chokoeva, Uwe Wollina, Torello Lotti, Irina Yungareva, Ilia Lozev, Georgi Konstantinov Maximov
Interdigital spaces could be an area of affection of a various cutaneous conditions, most of them with benign origin. The spectrum of differential diagnosis of pigmented interdigital lesions with a recent occurrence is not so wide, in contrast. When considering pigmented lesions in the interdigital area, the most harmless differential diagnosis is a traumatic hematoma. But what would happen if we based our therapeutic behaviour or suspicious and unconfirmed harmless diagnosis, instead of considering the real life-threatening once with priority, if we kept in mind that acral lentiginous melanoma has rather an aggressive course and is the main cause of death in skin cancer patients? We present a case of misdiagnosed interdigital melanoma, treated as a hemangioma with curettage, with almost fatal consequences, in regard to uncontrolled tumor progression as a result of the wrong traumatic procedure in one hand, and the lack of adequate screening and follow up, leading to progress of the disease with lymph node metastasis and poor prognosis in general...
January 25, 2018: Open Access Macedonian Journal of Medical Sciences
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