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temozolomide

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https://www.readbyqxmd.com/read/29150792/correlation-between-mgmt-promoter-methylation-and-response-to-temozolomide-based-therapy-in-neuroendocrine-neoplasms-an-observational-retrospective-multicenter-study
#1
Davide Campana, Thomas Walter, Sara Pusceddu, Fabio Gelsomino, Emmanuelle Graillot, Natalie Prinzi, Andrea Spallanzani, Michelangelo Fiorentino, Marc Barritault, Filippo Dall'Olio, Nicole Brighi, Guido Biasco
PURPOSE: Temozolomide (TEM) based therapy has been reported being effective in the treatment of metastatic neuroendocrine neoplasms (NEN), with response rates ranging from 30 to 70%. Among patients affected by advanced glioblastoma or melanoma and treated with TEM, loss of tumoral O6-methylguanine DNA methyltransferase (MGMT) is correlated with improved survival. In NEN patients, the role of MGMT deficiency in predicting clinical outcomes of TEM treatment is still under debate. METHODS: In this study we evaluated 95 patients with advanced NENs undergoing treatment with TEM-based therapy...
November 17, 2017: Endocrine
https://www.readbyqxmd.com/read/29148898/enhancement-of-invadopodia-activity-in-glioma-cells-by-sublethal-doses-of-irradiation-and-temozolomide
#2
Leon Mao, Clarissa A Whitehead, Lucia Paradiso, Andrew H Kaye, Andrew P Morokoff, Rodney B Luwor, Stanley S Stylli
OBJECTIVE Glioblastoma is the most common primary central nervous system tumor in adults. These tumors are highly invasive and infiltrative and result in tumor recurrence as well as an extremely poor patient prognosis. The current standard of care involves surgery, radiotherapy, and chemotherapy. However, previous studies have suggested that glioblastoma cells that survive treatment are potentially more invasive. The goal of this study was to investigate whether this increased phenotype in surviving cells is facilitated by actin-rich, membrane-based structures known as invadopodia...
November 17, 2017: Journal of Neurosurgery
https://www.readbyqxmd.com/read/29147435/gliosarcoma-in-young-adults-a-rare-variant-of-glioblastoma
#3
Neha Kakkar, Jaspreet Kaur, Gunjesh Kumar Singh, Pragya Singh, Fouzia Siraj, Ajay Gupta
Gliosarcoma is a rare central nervous system (CNS) malignancy. It is characterized by classical biphasic histological pattern with both glial and sarcomatous components, often seen in fifth and sixth decade of life. They are generally located in the supratentorial region. Due to its rarity, exact treatment recommendations are not available in literature. Since it is considered as a variant of glioblastoma multiforme (GBM), it is treated with surgery followed by adjuvant radiotherapy and temozolomide-based chemotherapy...
April 2017: World Journal of Oncology
https://www.readbyqxmd.com/read/29145267/osteoblastic-bone-metastases-from-neuroendocrine-tumor-net-of-unknown-origin-detected-by-18fluorocholine-pet-ct-and-its-comparison-with-68gallium-dotatoc-pet-ct-case-report-and-review-of-the-literature
#4
Alberto Bongiovanni, Federica Recine, Monica Celli, Giulia Marcantognini, Flavia Foca, Chiara Liverani, Valentina Fausti, Alessandro De Vita, Giacomo Miserocchi, Laura Mercatali, Dino Amadori, Toni Ibrahim
RATIONALE: Choline (CH) positron emission tomography (PET)/computed tomography (CT) with fluorine 18 (F) CH is increasingly used not only to evaluate patients with biochemically recurrent prostate cancer but also to assess metastatic lesions that are difficult or impossible to identify using more conventional modalities. Our experience with CH PET/CT has shown that it can also be used for many other malignancies. PRESENTING CONCERNS: A 71-year-old male with a neuroendocrine tumor (NET) of unknown origin showed osteoblastic bone metastases positive to F-CH PET...
November 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29143923/impact-of-concurrent-versus-adjuvant-chemotherapy-on-the-severity-and-duration-of-lymphopenia-in-glioma-patients-treated-with-radiation-therapy
#5
Alexander J Lin, Jian L Campian, Caressa Hui, Soumon Rudra, Yuan J Rao, Dinesh Thotala, Dennis Hallahan, Jiayi Huang
Prolonged severe lymphopenia has been shown to persist beyond a year in glioma patients after radiation therapy (RT) with concurrent and adjuvant chemotherapy. This study examines the differential impact of concurrent versus adjuvant chemotherapy on lymphopenia after RT. WHO grade II-III glioma patients who received RT with concurrent and/or adjuvant chemotherapy from 2007 to 2016 were retrospectively analyzed. Concurrent chemotherapy was temozolomide (TMZ), and adjuvant chemotherapy was either TMZ or procarbazine/lomustine/vincristine (PCV)...
November 16, 2017: Journal of Neuro-oncology
https://www.readbyqxmd.com/read/29143276/long-term-impact-of-temozolomide-on-1p-19q-codeleted-low-grade-glioma-growth-kinetics
#6
C Izquierdo, A Alentorn, A Idbaih, M Simó, G Kaloshi, D Ricard, M Barritault, D Meyronet, J Bruna, J Honnorat, J Y Delattre, F Ducray
Although upfront temozolomide (TMZ) has been widely-used to treat 1p/19q-codeleted diffuse low-grade gliomas (LGG), its long-term impact on the growth kinetics of these tumors has not been determined. Based on serial magnetic resonance images we retrospectively evaluated the evolution of the mean tumor diameter (MTD) in 36 progressive 1p/19q-codeleted LGG treated with upfront TMZ. After TMZ onset, all but two patients (94.4%) presented a progressive MTD decrease that lasted for a median duration of 23 months (range 3-114)...
November 15, 2017: Journal of Neuro-oncology
https://www.readbyqxmd.com/read/29141671/inhibiting-the-microglia-activation-improves-the-spatial-memory-and-adult-neurogenesis-in-rat-hippocampus-during-48%C3%A2-h-of-sleep-deprivation
#7
Meetu Wadhwa, Amit Prabhakar, Koushik Ray, Koustav Roy, Punita Kumari, Prabhash Kumar Jha, Krishna Kishore, Sanjeev Kumar, Usha Panjwani
BACKGROUND: Sleep deprivation (SD) leads to cognitive impairment. Neuroinflammation could be a significant contributing factor in the same. An increase in regional brain pro-inflammatory cytokines induces cognitive deficits, however, the magnitude of the effect under SD is not apparent. It is plausible that microglia activation could be involved in the SD-induced cognitive impairment by modulation of neuronal cell proliferation, differentiation, and brain-derived neuronal factor (BDNF) level...
November 15, 2017: Journal of Neuroinflammation
https://www.readbyqxmd.com/read/29141017/temozolomide-post-pazopanib-treatment-failure-in-patients-with-advanced-sarcoma-a-case-series
#8
Manojkumar Bupathi, John L Hays, James L Chen
BACKGROUND: Sarcomas are rare, heterogeneous tumors for which prognosis remains dismal in patients with advanced disease. Pazopanib, a vascular endothelial growth factor receptor inhibitor, has shown modest efficacy in patients with soft tissue sarcoma who fail cytotoxic chemotherapy. The cytotoxic agent temozolomide has also demonstrated activity in patients with advanced sarcoma. OBJECTIVE: We performed a retrospective case series to evaluate the feasibility of adding temozolomide to pazopanib in advanced sarcoma patients following single-agent pazopanib failure...
2017: PloS One
https://www.readbyqxmd.com/read/29139095/local-alkylating-chemotherapy-applied-immediately-after-5-ala-guided-resection-of-glioblastoma-does-not-provide-additional-benefit
#9
William Sage, Mathew Guilfoyle, Catriona Luney, Adam Young, Rohitashwa Sinha, Donatella Sgubin, Joseph H McAbee, Ruichong Ma, Sarah Jefferies, Rajesh Jena, Fiona Harris, Kieren Allinson, Tomasz Matys, Wendi Qian, Thomas Santarius, Stephen Price, Colin Watts
Grade IV glioma is the most common and aggressive primary brain tumour. Gross total resection with 5-aminolevulinic acid (5-ALA) guided surgery combined with local chemotherapy (carmustine wafers) is an attractive treatment strategy in these patients. No previous studies have examined the benefit carmustine wafers in a treatment programme of 5-ALA guided resection followed by a temozolomide-based chemoradiotherapy protocol. The objective of this study was to examine the benefit of carmustine wafers on survival in patients undergoing 5-ALA guided resection...
November 14, 2017: Journal of Neuro-oncology
https://www.readbyqxmd.com/read/29137963/failure-of-a-second-temozolomide-cycle-in-a-patient-with-a-prolactin-secreting-pituitary-carcinoma
#10
Ismene Bilbao, Nerea Egaña, Cristina García, Izaskun Olaizola
No abstract text is available yet for this article.
November 11, 2017: Endocrinología, diabetes y nutrición
https://www.readbyqxmd.com/read/29137258/aberrantly-activated-cox-2-and-wnt-signaling-interact-to-maintain-cancer-stem-cells-in-glioblastoma
#11
Megan Wu, Jennifer Guan, Chris Li, Simon Gunter, Labeeba Nusrat, Sheena Ng, Karan Dhand, Cindi Morshead, Albert Kim, Sunit Das
Glioblastoma recurrence after aggressive therapy typically occurs within six months, and patients inevitably succumb to their disease. Tumor recurrence is driven by a subpopulation of cancer stem cells in glioblastoma (glioblastoma stem-like cells, GSCs), which exhibit resistance to cytotoxic therapies, compared to their non-stem-cell counterparts. Here, we show that the Cox-2 and Wnt signaling pathways are aberrantly activated in GSCs and interact to maintain the cancer stem cell identity. Cox-2 stimulates GSC self-renewal and proliferation through prostaglandin E2 (PGE2), which in turn activates the Wnt signaling pathway...
October 10, 2017: Oncotarget
https://www.readbyqxmd.com/read/29136760/upregulation-of-casc2-sensitized-glioma-to-temozolomide-cytotoxicity-through-autophagy-inhibition-by-sponging-mir-193a-5p-and-regulating-mtor-expression
#12
Chunming Jiang, Fang Shen, Jianmin Du, Xiang Fang, Xiaoli Li, Jin Su, Xiaohua Wang, Xianmei Huang, Zhangli Liu
OBJECTIVE: Numerous studies suggested autophagy was involved in temozolomide (TMZ) resistance in glioma. Long non-coding RNA (lncRNA) CASC2 was shown to be downregulated in glioma tissues and cell lines, and was related to the TMZ resistance. However, whether CASC2 affects TMZ resistance through regulating autophagy is unknown. The aim of this study was to assess the role and mechanism of CASC2 in TMZ-induced drug resistance in glioma cells. METHODS: Glioma and the adjacent non-cancerous tissues from 32 patients were collected...
November 6, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29135107/benefit-and-outcome-of-using-temozolomide-based-chemoradiotherapy-followed-by-temozolomide-alone-for-glioblastoma-in-clinical-practice
#13
Svetlana Salma, Igor Djan, Mladen Bjelan, Petar Vulekovic, Mico Novakovic, Vladimir Vidovic, Milos Lucic
PURPOSE: Temozolomide (TEM), an oral alkylating agent, has shown promising activity in the last 10 years in the treatment of glioblastoma multiforme (GBM). Our goal was to show the benefit of concomitant therapy involving 3D conformal radiotherapy and temozolomide in clinical practice. METHODS: This was a retrospective/prospective study and included a total of 113 patients with GBM diagnosis. Forty- seven patients received postoperative radiotherapy and 66 received concomitant temozolomide plus 3D conformal radiotherapy...
September 2017: Journal of B.U.ON.: Official Journal of the Balkan Union of Oncology
https://www.readbyqxmd.com/read/29128799/fty720-inhibits-the-nrf2-are-pathway-in-human-glioblastoma-cell-lines-and-sensitizes-glioblastoma-cells-to-temozolomide
#14
Li Zhang, Handong Wang
BACKGROUND: Nuclear factor erythroid 2-related factor 2 (Nrf2) is a redox-sensitive transcription factor regulating the expression of various cytoprotective genes. Constitutive Nrf2 activation in many cancers enhances cell survival and resistance to anti-cancer drugs. Our previous studies have shown that FTY720 induced autophagy-related apoptosis and necroptosis and inhibited invasion and migration in human glioblastoma cells. However, whether FTY720 regulated Nrf2 in glioblastoma cells remained unclear...
July 4, 2017: Pharmacological Reports: PR
https://www.readbyqxmd.com/read/29126391/microrna-195-acts-as-an-anti-proliferative-mirna-in-human-melanoma-cells-by-targeting-prohibitin-1
#15
Priscila Daniele Ramos Cirilo, Luciana Nogueira de Sousa Andrade, Bruna Renata Silva Corrêa, Mei Qiao, Tatiane Katsue Furuya, Roger Chammas, Luiz Otavio Ferraz Penalva
BACKGROUND: Melanoma is the most lethal type of skin cancer. Since chemoresistance is a significant barrier, identification of regulators affecting chemosensitivity is necessary in order to create new forms of intervention. Prohibitin 1 (PHB1) can act as anti-apoptotic or tumor suppressor molecule, depending on its subcellular localization. Our recent data shown that accumulation of PHB1 protects melanoma cells from chemotherapy-induced cell death. Lacking of post-transcriptional regulation of PHB1 could explain this accumulation...
November 10, 2017: BMC Cancer
https://www.readbyqxmd.com/read/29126203/a-randomized-phase-ii-study-of-everolimus-in-combination-with-chemoradiation-in-newly-diagnosed-glioblastoma-results-of-nrg-oncology-rtog-0913
#16
Prakash Chinnaiyan, Minhee Won, Patrick Y Wen, Amyn M Rojiani, Maria Werner-Wasik, Helen A Shih, Lynn S Ashby, Hsiang-Hsuan Michael Yu, Volker W Stieber, Shawn C Malone, John B Fiveash, Nimish A Mohile, Manmeet S Ahluwalia, Merideth M Wendland, Philip J Stella, Andrew Y Kee, Minesh P Mehta
Background: This Phase II study was designed to determine the efficacy of the mTOR inhibitor everolimus administered daily with conventional radiation therapy and chemotherapy in patients with newly diagnosed glioblastoma. Methods: Patients were randomized to radiation therapy with concurrent and adjuvant temozolomide with or without daily everolimus (10 mg). The primary endpoint was progression-free survival (PFS) and the secondary endpoints were overall survival (OS) and treatment-related toxicities...
November 6, 2017: Neuro-oncology
https://www.readbyqxmd.com/read/29124650/correction-to-which-elderly-newly-diagnosed-glioblastoma-patients-can-benefit-from-radiotherapy-and-temozolomide-a-perno-prospective-study
#17
Enrico Franceschi, Roberta Depenni, Alexandro Paccapelo, Mario Ermani, Marina Faedi, Carmelo Sturiale, Maria Michiara, Franco Servadei, Giacomo Pavesi, Benedetta Urbini, Anna Pisanello, Girolamo Crisi, Michele A Cavallo, Claudio Dazzi, Claudia Biasini, Federica Bertolini, Claudia Mucciarini, Giuseppe Pasini, Agostino Baruzzi, Alba A Brandes
The members of the PERNO Study Group were not individually captured in the metadata of the original publication. They are included in the metadata of this publication.
November 9, 2017: Journal of Neuro-oncology
https://www.readbyqxmd.com/read/29123181/carnosol-controls-the-human-glioblastoma-stemness-features-through-the-epithelial-mesenchymal-transition-modulation-and-the-induction-of-cancer-stem-cell-apoptosis
#18
Chiara Giacomelli, Simona Daniele, Letizia Natali, Caterina Iofrida, Guido Flamini, Alessandra Braca, M Letizia Trincavelli, Claudia Martini
A high cell proliferation rate, invasiveness and resistance to chemotherapy are the main features of glioblastoma (GBM). GBM aggressiveness has been widely associated both with a minor population of cells presenting stem-like properties (cancer stem-like cells, CSCs) and with the ability of tumor cells to acquire a mesenchymal phenotype (epithelial-mesenchymal transition, EMT). Carnosol (CAR), a natural inhibitor of MDM2/p53 complex, has been attracted attention for its anti-cancer effects on several tumor types, including GBM...
November 9, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29122306/carmustine-wafer-implantation-for-high-grade-gliomas-evidence-based-safety-efficacy-and-practical-recommendations-from-the-neuro-oncology-club-of-the-french-society-of-neurosurgery
#19
REVIEW
A Roux, F Caire, J Guyotat, P Menei, P Metellus, J Pallud
There is a growing body of evidence that carmustine wafer implantation during surgery is an effective therapeutic adjunct to the standard combined radio-chemotherapy regimen using temozolomide in newly diagnosed and recurrent high-grade glioma patient management with a statistically significant survival benefit demonstrated across several randomized clinical trials, as well as prospective and retrospective studies (grade A recommendation). Compelling clinical data also support the safety of carmustine wafer implantation (grade A recommendation) in these patients and suggest that observed adverse events can be avoided in experienced neurosurgeon hands...
November 6, 2017: Neuro-Chirurgie
https://www.readbyqxmd.com/read/29121274/quality-of-life-in-the-glarius-trial-randomizing-bevacizumab-irinotecan-versus-temozolomide-in-newly-diagnosed-mgmt-nonmethylated-glioblastoma
#20
Niklas Schäfer, Martin Proescholdt, Joachim P Steinbach, Astrid Weyerbrock, Peter Hau, Oliver Grauer, Roland Goldbrunner, Franziska Friedrich, Veit Rohde, Florian Ringel, Uwe Schlegel, Michael Sabel, Michael W Ronellenfitsch, Martin Uhl, Stefan Grau, Mathias Hänel, Oliver Schnell, Dietmar Krex, Peter Vajkoczy, Ghazaleh Tabatabai, Frederic Mack, Christina Schaub, Theophilos Tzaridis, Michael Nießen, Sied Kebir, Barbara Leutgeb, Horst Urbach, Claus Belka, Walter Stummer, Martin Glas, Ulrich Herrlinger
Background: The GLARIUS trial which investigated the efficacy of bevacizumab (BEV)/irinotecan (IRI) as compared to standard temozolomide (TMZ) in the first-line therapy of MGMT-nonmethylated glioblastoma showed that progression-free survival was significantly prolonged by BEV/IRI while overall survival was similar in both arms. The present report focusses on quality of life (QoL) and Karnofsky performance score (KPS) during the whole course of the disease. Patients and methods: Patients (n=170) received standard radiotherapy and were randomized (2:1) for BEV/IRI or standard TMZ...
November 7, 2017: Neuro-oncology
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