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https://www.readbyqxmd.com/read/29158366/therapeutic-anticoagulation-in-patients-with-primary-brain-tumors-or-secondary-brain-metastasis
#1
REVIEW
Richard J Lin, David L Green, Gunjan L Shah
Patients with primary or metastatic brain tumors are at increased risk of developing venous thromboses. However, the potential benefit of therapeutic anticoagulation in these patients must be weighed against the deadly complication of intracranial hemorrhage. In this review, we summarize available evidence and recent studies of intracranial bleeding risks in primary and metastatic tumors and the impact of therapeutic anticoagulation. We find that for the majority of primary and treated metastatic brain tumors, the risk of spontaneous bleeding is acceptable and not further increased by careful therapeutic anticoagulation with low molecular weight heparin or direct oral anticoagulants, although thrombocytopenia (platelet count less than 50,000/μL) and other coagulopathies are relative contraindications...
November 20, 2017: Oncologist
https://www.readbyqxmd.com/read/29156737/combination-treatment-with-recombinant-methioninase-enables-temozolomide-to-arrest-a-braf-v600e-melanoma-in-a-patient-derived-orthotopic-xenograft-pdox-mouse-model
#2
Kei Kawaguchi, Kentaro Igarashi, Shukuan Li, Qinghong Han, Yuying Tan, Tasuku Kiyuna, Kentaro Miyake, Takashi Murakami, Bartosz Chmielowski, Scott D Nelson, Tara A Russell, Sarah M Dry, Yunfeng Li, Michiaki Unno, Fritz C Eilber, Robert M Hoffman
An excessive requirement for methionine termed methionine dependence, appears to be a general metabolic defect in cancer. We have previously shown that cancer-cell growth can be selectively arrested by methionine deprivation such as with recombinant methioninase (rMETase). The present study used a previously-established patient-derived orthotopic xenograft (PDOX) nude mouse model of BRAF V600E-mutant melanoma to determine the efficacy of rMETase in combination with a first-line melanoma drug, temozolomide (TEM)...
October 17, 2017: Oncotarget
https://www.readbyqxmd.com/read/29155017/p-glycoprotein-mdr1-abcb1-and-breast-cancer-resistance-protein-bcrp-abcg2-affect-brain-accumulation-and-intestinal-disposition-of-encorafenib-in-mice
#3
Jing Wang, Changpei Gan, Rolf W Sparidans, Els Wagenaar, Stéphanie van Hoppe, Jos H Beijnen, Alfred H Schinkel
Encorafenib (LGX818) is a promising BRAF(V600E) inhibitor that has efficacy against metastatic melanoma. To better understand its pharmacokinetics, we studied its interactions with the multidrug efflux transporters ABCB1 and ABCG2 and the multidrug metabolizing enzyme CYP3A. In polarized MDCK-II cells, encorafenib was efficiently transported by canine and human ABCB1 and ABCG2 and by mouse Abcg2. Upon oral administration to wild-type, Abcb1a/1b(-/-), Abcg2(-/-), and Abcb1a/1b;Abcg2(-/-) mice, encorafenib was absorbed very quickly and to very high plasma levels, but without clear changes in oral availability between the strains...
November 14, 2017: Pharmacological Research: the Official Journal of the Italian Pharmacological Society
https://www.readbyqxmd.com/read/29151970/ki67-proliferation-index-as-a-histopathological-predictive-and-prognostic-parameter-of-oral-mucosal-melanoma-in-patients-without-distant-metastases
#4
Xuhui Ma, Yunteng Wu, Tian Zhang, Hao Song, Houyu Jv, Wei Guo, Guoxin Ren
Background: To investigate the relationship between clinical and histopathological characteristics and overall survival of patients with oral mucosal melanoma (OMM) without distal metastasis in order to provide predictive prognostic information of OMM. Methods: Ki67 expression was assessed by immunohistochemistry in 123 patients with OMM without distant metastases. The associations between Ki67 expression and clinical features and overall survival (OS) of patients were statistically analyzed. The Ki67 levels of the primary and recurrent lesions from 14 OMM patients were compared...
2017: Journal of Cancer
https://www.readbyqxmd.com/read/29137292/the-clinical-significance-of-c-kit-mutations-in-metastatic-oral-mucosal-melanoma-in-china
#5
Xuhui Ma, Yunteng Wu, Tian Zhang, Hao Song, Houyu Jv, Wei Guo, Guoxin Ren
c-Kit mutations are frequently detected in mucosal melanomas, but their clinical significance in metastatic oral mucosal melanomas (OMM) remains unclear. The main purpose of this study was to investigate the clinical and pathological features of metastatic OMMs with c-Kit mutations and the efficiency of the tyrosine kinase inhibitor imatinib in treating metastatic OMMs. We found thatresidual primary lesion and neck lymph nodes could act as independent prognostic factors in metastatic OMM patients. c-Kit mutations were detected in 22 out of 139 (15...
October 10, 2017: Oncotarget
https://www.readbyqxmd.com/read/29124765/lipocalin-type-prostaglandin-d-synthase-derived-pgd2-attenuates-malignant-properties-of-endothelial-cells-in-tumor
#6
Keisuke Omori, Teppei Morikawa, Akiko Kunita, Tatsuro Nakamura, Kosuke Aritake, Yoshihiro Urade, Masashi Fukayama, Takahisa Murata
Endothelial cells (ECs) are a key component of the tumor microenvironment. They have abnormal characteristics compared to the ECs in normal tissues. Here, we found a marked increase in lipocalin-type prostaglandin D synthase (L-PGDS) mRNA (Ptgds) expression in ECs isolated from mouse melanoma. Immunostaining of mouse melanoma revealed expression of L-PGDS protein in the ECs. In situ hybridization also showed L-PGDS (PTGDS) mRNA expression in the ECs of human melanoma and oral squamous cell carcinoma. In vitro experiments showed that stimulation with tumor cell-derived IL-1 and TNF-α increased L-PGDS mRNA expression and its product prostaglandin D2 (PGD2 ) in human normal ECs...
November 10, 2017: Journal of Pathology
https://www.readbyqxmd.com/read/29121363/treatment-of-ipilimumab-induced-vogt-koyanagi-harada-syndrome-with-oral-dexamethasone
#7
Matthew T Witmer
The author presents a retrospective case report of a 54-year-old male with ipilimumab (Yervoy; Bristol-Myers Squibb, New York City, NY)-induced Vogt-Koyanagi-Harada Disease (VKH), which consisted of uveitis, optic neuritis, and choroiditis that was successfully treated with oral dexamethasone. The patient demonstrated resolution of uveitis, optic neuritis, and choroiditis 1 month following initiation of oral dexamethasone. Ipilimumab is a recently approved therapy for malignant melanoma. Reports have identified that VKH disease is a potential side effect of the medication...
November 1, 2017: Ophthalmic Surgery, Lasers & Imaging Retina
https://www.readbyqxmd.com/read/29104720/dasatinib-induced-seborrheic-dermatitis-like-eruption
#8
Ryan R Riahi, Philip R Cohen
Dasatinib is an oral tyrosine kinase inhibitor approved for imatinib-resistant chronic myelogenous leukemia. It has been investigated in treating other neoplasms, including non-small-cell lung cancer and a subset of melanomas. Seborrheic dermatitis is characterized by erythematous patches or plaques with scaling typically affecting the external ear, glabella, hair-bearing areas of the face, nasolabial fold, and scalp. Antitumor agents are often associated with mucocutaneous side effects, including seborrheic dermatitis...
July 2017: Journal of Clinical and Aesthetic Dermatology
https://www.readbyqxmd.com/read/29097493/gut-microbiome-modulates-response-to-anti-pd-1-immunotherapy-in-melanoma-patients
#9
V Gopalakrishnan, C N Spencer, L Nezi, A Reuben, M C Andrews, T V Karpinets, P A Prieto, D Vicente, K Hoffman, S C Wei, A P Cogdill, L Zhao, C W Hudgens, D S Hutchinson, T Manzo, M Petaccia de Macedo, T Cotechini, T Kumar, W S Chen, S M Reddy, R Szczepaniak Sloane, J Galloway-Pena, H Jiang, P L Chen, E J Shpall, K Rezvani, A M Alousi, R F Chemaly, S Shelburne, L M Vence, P C Okhuysen, V B Jensen, A G Swennes, F McAllister, E Marcelo Riquelme Sanchez, Y Zhang, E Le Chatelier, L Zitvogel, N Pons, J L Austin-Breneman, L E Haydu, E M Burton, J M Gardner, E Sirmans, J Hu, A J Lazar, T Tsujikawa, A Diab, H Tawbi, I C Glitza, W J Hwu, S P Patel, S E Woodman, R N Amaria, M A Davies, J E Gershenwald, P Hwu, J E Lee, J Zhang, L M Coussens, Z A Cooper, P A Futreal, C R Daniel, N J Ajami, J F Petrosino, M T Tetzlaff, P Sharma, J P Allison, R R Jenq, J A Wargo
Pre-clinical mouse models suggest that the gut microbiome modulates tumor response to checkpoint blockade immunotherapy; however, this has not been well-characterized in human cancer patients. Here we examined the oral and gut microbiome of melanoma patients undergoing anti-PD-1 immunotherapy (n=112). Significant differences were observed in the diversity and composition of the patient gut microbiome of responders (R) versus non-responders (NR). Analysis of patient fecal microbiome samples (n=43, 30R, 13NR) showed significantly higher alpha diversity (p<0...
November 2, 2017: Science
https://www.readbyqxmd.com/read/29090969/expression-of-cat-podoplanin-in-feline-squamous-cell-carcinomas
#10
Shunsuke Itai, Shinji Yamada, Mika K Kaneko, Hiroyuki Harada, Yumiko Kagawa, Satoru Konnai, Yukinari Kato
Oral squamous cell carcinoma is an aggressive tumor in cats; however, molecular-targeted therapies against this tumor, including antibody therapy, have not been developed. Sensitive and specific monoclonal antibodies (mAbs) against highly expressed membrane proteins are needed to develop antibody therapies. Podoplanin, a type I transmembrane glycoprotein, is expressed in many human malignant tumors, including brain tumor, esophageal cancer, lung cancer, mesothelioma, and oral cancer. Podoplanin binds to C-type lectin-like receptor-2 (CLEC-2) and activates platelet aggregation, which is involved in cancer metastasis...
November 1, 2017: Monoclonal Antibodies in Immunodiagnosis and Immunotherapy
https://www.readbyqxmd.com/read/29081658/understanding-the-positive-benefit-risk-profile-of-alemtuzumab-in-relapsing-multiple-sclerosis-perspectives-from-the-alemtuzumab-clinical-development-program
#11
REVIEW
Eva Havrdova, Jeffrey A Cohen, Dana Horakova, Ivana Kovarova, Eva Meluzinova
The introduction of high-efficacy therapies for relapsing-remitting multiple sclerosis has driven re-evaluation of treatment goals and benefit:risk considerations in treatment choice. In the alemtuzumab Phase II and III clinical trials, patients treated with alemtuzumab 12 mg versus subcutaneous interferon beta-1a demonstrated significantly reduced annualized relapse rates and improved magnetic resonance imaging outcomes, and were significantly more likely to achieve no evidence of disease activity and reduction in brain volume loss...
2017: Therapeutics and Clinical Risk Management
https://www.readbyqxmd.com/read/29066909/case-report-of-a-kit-mutated-melanoma-patient-with-an-excellent-response-to-apatinib-and-temozolomide-combination-therapy
#12
Cong Luo, Jiayu Shen, Jieer Ying, Xianhua Fang, Xiaohong Wang, Zhixuan Fu, Peng Liu
Malignant melanoma is one kind of malignant disease which has high rates of mortality, metastasis, and poor prognosis. The therapeutic landscape is rapidly changing with the development of novel agents in recent decades, such as anti-PD-1 agents, anti-CTLA-4 agents, and BRAF inhibitors. However, since most of these novel agents are very expensive, not all patients can afford them. Apatinib is a novel oral small-molecule tyrosine kinase inhibitor targeting the intracellular domain of vascular endothelial growth factor receptor 2 (VEGFR-2) and may also be effective on Ret, c-KIT, and c-src...
2017: OncoTargets and Therapy
https://www.readbyqxmd.com/read/29064206/correlation-of-changes-in-hif-1%C3%AE-and-p53-expressions-with-vitamin-b3-deficiency-in-skin-cancer-patients
#13
Ting Liu, Hao Yang, Yunzhu Mou, Hao Zhang
BACKGROUND: To investigate the correlation of changes in hypoxia-inducible factor-1α (HIF-1α) and p53 expressions with vitamin B3 deficiency in skin cancer patients. METHODS: Twenty non-melanoma skin cancer patients with positive HIF-1α and p53 expressions were selected and randomly divided into two groups, the placebo group and the experimental group. After an appropriate number of cancer tissues were taken, the experimental group was treated with oral administration of 500 mg vitamin B3 every day, while the placebo group was treated with oral administration of the same amount of placebo; after 1 week, the skin cancer tissues in the same part were taken, and the skin tissues of healthy people were taken as the control group; the mRNA and protein expression levels of HIF-1α and p53 in tissues were detected...
October 23, 2017: Giornale Italiano di Dermatologia e Venereologia: Organo Ufficiale, Società Italiana di Dermatologia e Sifilografia
https://www.readbyqxmd.com/read/29058595/world-wide-immunoscore-task-force-meeting-report-from-the-melanoma-bridge-napoli-november-30th-december-3rd-2016
#14
Jerome Galon, Alessandro Lugli, Carlo Bifulco, Franck Pages, Giuseppe Masucci, Francesco M Marincola, Paolo A Ascierto
The predictive accuracy of the traditional staging system is based on disease progression as a tumour cell-autonomous process, but it fails to incorporate the effects of the host immune response. A precise analysis of the immune component of the tumour microenvironment by computer-based analysis may be essential to managing patients better, opening the road to an expertise in this new emerging field. The Immunoscore as a new possible approach in the classification of cancer, designated TNM-Immune, studied in colon cancer patients with predictive and prognostic value...
October 20, 2017: Journal of Translational Medicine
https://www.readbyqxmd.com/read/29051777/melanoma-in-pregnancy
#15
REVIEW
Rebecca Still, Shaun Brennecke
Melanoma is one of the most common cancers diagnosed in pregnancy and has a high metastatic potential. As the incidence of melanoma increases, careful clinical evaluation of suspicious skin lesions remains the mainstay of early diagnosis. There is controversy in the literature as to whether pregnancy-associated melanoma has worse survival than other melanomas. Any changing-pigmented lesion should be biopsied, regardless of pregnancy hyperpigmentation. Increased lymphangiogenesis in pregnancy is associated with increased metastasis - timely diagnosis is therefore imperative...
September 2017: Obstetric Medicine
https://www.readbyqxmd.com/read/29034279/rare-and-extensive-malignant-melanoma-of-the-oral-cavity-report-of-two-cases
#16
Parviz Deyhimi, Sayed Mohammad Razavi, Shirin Shahnaseri, Saeedeh Khalesi, Solmaz Homayoni, Payam Tavakoli
Primary oral melanomas are uncommon malignant neoplasm of melanocytes origin. The most common site of oral melanoma is maxillary gingiva and hard palate. Oral mucosal melanoma exhibit a pathobiological behavior and clinical features different from cutaneous melanomas. Oral melanomas are often clinically silent which may consequently result in delayed diagnosis; thus, making the prognosis extremely poor. This case report presents clinical, histopathological and immunohistochemical features of two cases of advanced oral melanoma, one pigmented or melanotic melanoma in a 46-year-old female and another amelanotic melanoma in a 59-year-old male patient, with chief complaint of swelling in oral mucosa...
September 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/29034278/cytotoxic-effect-of-thiabendazole-on-hn5-head-and-neck-squamous-cell-carcinoma-cell-line
#17
Amir Jalal Abassi, Abdolreza Mohamadnia, Seyed Alireza Parhiz, Nahid Azizi Moghadam, Naghmeh Bahrami
STATEMENT OF THE PROBLEM: Evidence shows thiabendazole has the potential to inhibit angiogenesis in melanoma and fibrosarcoma; however, its effect on oral squamous cell carcinoma has not been previously studied. PURPOSE: This study sought to assess the cytotoxic effects of thiabendazole on HN5 head and neck squamous carcinoma cell line. MATERIALS AND METHOD: HN5 cell lines were exposed to different concentrations of thiabendazole (prepared from 99% pure powder) for 24, 48 and 72 hours...
September 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/29031034/-potential-of-using-vitamin-d-as-an-adjuvant-treatment-of-malignant-melanoma
#18
B Bolerázska, E Ďurovcová, M Mareková
The incidence of malignant melanoma worldwide continues to grow despite the enormous advances in topical and systemic therapy. This increase is recorded regularly even in countries where, as a result of public health campaigns, dermatological examination and subsequent treatment have become more frequent. However, there have been reports of a stable or even decreasing mortality rate that seem to contradict the objective increase in its incidence. The well-known risk factors for malignant melanoma include sunburns and occasional sunbathing, whereas regular sunbathing is associated with a lower incidence...
2017: Klinická Onkologie: Casopis Ceské a Slovenské Onkologické Spolecnosti
https://www.readbyqxmd.com/read/29027689/oral-mucosa-model-for-electrochemotherapy-treatment-of-dog-mouth-cancer-ex-vivo-in-silico-and-in-vivo-experiments
#19
Daniela O H Suzuki, José A Berkenbrock, Marisa J S Frederico, Fátima R M B Silva, Marcelo M M Rangel
Electrochemotherapy (EQT) is a local cancer treatment well established to cutaneous and subcutaneous tumors. Electric fields are applied to biological tissue in order to improve membrane permeability for cytotoxic drugs. This phenomenon is called electroporation or electropermeabilization. Studies have reported that tissue conductivity is electric field dependent. Electroporation numerical models of biological tissues are essential in treatment planning. Tumors of the mouth are very common in dogs. Inadequate EQT treatment of oral tumor may be caused by significant anatomic variations between dogs and tumor position...
October 13, 2017: Artificial Organs
https://www.readbyqxmd.com/read/28994020/vitamin-d-and-the-skin-an-update-for-dermatologists
#20
REVIEW
Elio Kechichian, Khaled Ezzedine
Vitamin D plays a key role in skeletal and cardiovascular disorders, cancers, central nervous system diseases, reproductive diseases, infections, and autoimmune and dermatological disorders. The two main sources of vitamin D are sun exposure and oral intake, including vitamin D supplementation and dietary intake. Multiple factors are linked to vitamin D status, such as Fitzpatrick skin type, sex, body mass index, physical activity, alcohol intake, and vitamin D receptor polymorphisms. Patients with photosensitive disorders tend to avoid sun exposure, and this practice, along with photoprotection, can put this category of patients at risk for vitamin D deficiency...
October 9, 2017: American Journal of Clinical Dermatology
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