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https://www.readbyqxmd.com/read/27893038/targeting-the-pi3k-akt-mtor-pathway-for-the-treatment-of-mesenchymal-triple-negative-breast-cancer-evidence-from-a-phase-1-trial-of-mtor-inhibition-in-combination-with-liposomal-doxorubicin-and-bevacizumab
#1
Reva K Basho, Michael Gilcrease, Rashmi K Murthy, Thorunn Helgason, Daniel D Karp, Funda Meric-Bernstam, Kenneth R Hess, Shelley M Herbrich, Vicente Valero, Constance Albarracin, Jennifer K Litton, Mariana Chavez-MacGregor, Nuhad K Ibrahim, James L Murray, Kimberly B Koenig, David Hong, Vivek Subbiah, Razelle Kurzrock, Filip Janku, Stacy L Moulder
Importance: Triple-negative breast cancer (TNBC) classified by transcriptional profiling as the mesenchymal subtype frequently harbors aberrations in the phosphoinositide 3-kinase (PI3K) pathway, raising the possibility of targeting this pathway to enhance chemotherapy response. Up to 30% of mesenchymal TNBC can be classified histologically as metaplastic breast cancer, a chemorefractory group of tumors with a mixture of epithelial and mesenchymal components identifiable by light microscopy...
November 23, 2016: JAMA Oncology
https://www.readbyqxmd.com/read/27863926/combination-of-temsirolimus-and-adriamycin-exhibits-an-enhanced-antitumor-effect-in-hepatocellular-carcinoma
#2
Hong-Gang Kang, Bao-Zhong Wang, Jing Zhang, Mei-Rong Liu, Ying-Xue Li
OBJECTIVE: The oncogenic PI3K/Akt/mTOR pathway is frequently activated in hepatocellular carcinoma (HCC). The aim of this study is to investigate the anti-HCC effect of combination of temsirolimus, an mTOR inhibitor, and adriamycin, a routinely used drug for treating HCC. METHODS AND MATERIALS: Proliferation of HCC cells exposure to temsirolimus, adriamycin, and their combination was determined using MTT assay in vitro as well as in a nude mice model in vivo. Cell apoptosis was examined using flow cytometry...
November 15, 2016: Clinics and Research in Hepatology and Gastroenterology
https://www.readbyqxmd.com/read/27799065/a-case-study-of-an-integrative-genomic-and-experimental-therapeutic-approach-for-rare-tumors-identification-of-vulnerabilities-in-a-pediatric-poorly-differentiated-carcinoma
#3
Filemon S Dela Cruz, Daniel Diolaiti, Andrew T Turk, Allison R Rainey, Alberto Ambesi-Impiombato, Stuart J Andrews, Mahesh M Mansukhani, Peter L Nagy, Mariano J Alvarez, Andrea Califano, Farhad Forouhar, Beata Modzelewski, Chelsey M Mitchell, Darrell J Yamashiro, Lianna J Marks, Julia L Glade Bender, Andrew L Kung
BACKGROUND: Precision medicine approaches are ideally suited for rare tumors where comprehensive characterization may have diagnostic, prognostic, and therapeutic value. We describe the clinical case and molecular characterization of an adolescent with metastatic poorly differentiated carcinoma (PDC). Given the rarity and poor prognosis associated with PDC in children, we utilized genomic analysis and preclinical models to validate oncogenic drivers and identify molecular vulnerabilities...
October 31, 2016: Genome Medicine
https://www.readbyqxmd.com/read/27793908/co-treatment-of-ly294002-or-mk-2206-with-azd5363-attenuates-azd5363-induced-increase-in-the-level-of-phosphorylated-akt
#4
Ae-Ran Choi, Ju-Hwa Kim, Yeon Hwa Woo, Ji Hyun Cheon, Hyung Sik Kim, Sungpil Yoon
Clinical trials are in progress on AZD5363, an inhibitor of protein kinase B (AKT), to assess its effects on the phosphoinositide 3-kinase (PI3K)/AKT/mammalian target of rapamycin (mTOR) pathway. Cells treated with AKT inhibitors have been reported to activate alternative pathways in order to escape growth inhibition. AZD5363-sensitized Hs578T breast cancer cells displayed reduced levels of phosphorylated glycogen synthase kinase 3 beta (pGSK3β). Interestingly, in AZD5363-treated cells, the level of phosphorylated (activated) AKT (pAKT) increased...
November 2016: Anticancer Research
https://www.readbyqxmd.com/read/27791402/attributable-risk-of-infection-to-mtor-inhibitors-everolimus-and-temsirolimus-in-the-treatment-of-cancer
#5
Christine A Garcia, Shenhong Wu
The risk of infection attributable to mTOR inhibitors has not been determined. Databases from PubMed and abstracts presented at the American Society of Clinical Oncology meetings were searched. Eligible studies included randomized controlled trials, in which everolimus or temsirolimus was compared with placebo. A total of 12 trials were included. The attributable incidences of all-grade and high-grade infections to mTOR inhibitors were 9.3% (95% confidence interval (CI): 5.8-14.6%) and 2.3% (95% CI: 1.2-4.4%) respectively...
October 28, 2016: Cancer Investigation
https://www.readbyqxmd.com/read/27741505/wide-spetcrum-mutational-analysis-of-metastatic-renal-cell-cancer-a-retrospective-next-generation-sequencing-approach
#6
Michelangelo Fiorentino, Elisa Gruppioni, Francesco Massari, Francesca Giunchi, Annalisa Altimari, Chiara Ciccarese, Davide Bimbatti, Aldo Scarpa, Roberto Iacovelli, Camillo Porta, Sarhadi Virinder, Giampaolo Tortora, Walter Artibani, Riccardo Schiavina, Andrea Ardizzoni, Matteo Brunelli, Sakari Knuutila, Guido Martignoni
Renal cell cancer (RCC) is characterized by histological and molecular heterogeneity that may account for variable response to targeted therapies. We evaluated retrospectively with a next generation sequencing (NGS) approach using a pre-designed cancer panel the mutation burden of 32 lesions from 22 metastatic RCC patients treated with at least one tyrosine kinase or mTOR inhibitor. We identified mutations in the VHL, PTEN, JAK3, MET, ERBB4, APC, CDKN2A, FGFR3, EGFR, RB1, TP53 genes. Somatic alterations were correlated with response to therapy...
October 10, 2016: Oncotarget
https://www.readbyqxmd.com/read/27737762/cb1-cannabinoid-receptors-mediate-cognitive-deficits-and-structural-plasticity-changes-during-nicotine-withdrawal
#7
Rocio Saravia, África Flores, Ainhoa Plaza-Zabala, Arnau Busquets-Garcia, Antoni Pastor, Rafael de la Torre, Vincenzo Di Marzo, Giovanni Marsicano, Andrés Ozaita, Rafael Maldonado, Fernando Berrendero
BACKGROUND: Tobacco withdrawal is associated with deficits in cognitive function, including attention, working memory, and episodic memory. Understanding the neurobiological mechanisms involved in these effects is crucial because cognitive deficits during nicotine withdrawal may predict relapse in humans. METHODS: We investigated in mice the role of CB1 cannabinoid receptors (CB1Rs) in memory impairment and spine density changes induced by nicotine withdrawal precipitated by the nicotinic antagonist mecamylamine...
July 16, 2016: Biological Psychiatry
https://www.readbyqxmd.com/read/27721266/a-comparison-of-drug-resistances-of-targeted-drugs-for-advanced-renal-cell-cancer-approved-by-the-food-and-drug-administration-a-meta-analysis-of-randomized-clinical-trials
#8
Ming Guo, Yunsong Cao, Jingzhe Yang, Jingfeng Zhang
PURPOSE: The purpose of this study was to conduct network meta-analysis to assess drug resistances of the Food and Drug Administration-approved drugs for advanced renal cell carcinoma. MATERIALS AND METHODS: Database searches were conducted to identify randomized controlled trials reporting results for eligible treatments. After searching for PubMed, MEDLINE, EMBASE, and ISI Web of Science, 22 studies (n = 7854 patients) were included for the comparison of drug resistance in the present meta-analysis...
October 2016: Journal of Cancer Research and Therapeutics
https://www.readbyqxmd.com/read/27714772/mammalian-target-of-rapamycin-inhibition-with-temsirolimus-in-myelodysplastic-syndromes-mds-patients-is-associated-with-considerable-toxicity-results-of-the-temsirolimus-pilot-trial-by-the-german-mds-study-group-d-mds
#9
Martin Wermke, Claudia Schuster, Florian Nolte, Haifa-Kathrin Al-Ali, Philipp Kiewe, Claudia Schönefeldt, Christiane Jakob, Malte von Bonin, Leopold Hentschel, Ina-Maria Klut, Gerhard Ehninger, Martin Bornhäuser, Gustavo Baretton, Ulrich Germing, Regina Herbst, Detelef Haase, Wolf K Hofmann, Uwe Platzbecker
The mammalian-target of rapamycin (also termed mechanistic target of rapamycin, mTOR) pathway integrates various pro-proliferative and anti-apoptotic stimuli and is involved in regulatory T-cell (TREG) development. As these processes contribute to the pathogenesis of myelodysplastic syndromes (MDS), we hypothesized that mTOR modulation with temsirolimus (TEM) might show activity in MDS. This prospective multicentre trial enrolled lower and higher risk MDS patients, provided that they were transfusion-dependent/neutropenic or relapsed/refractory to 5-azacitidine, respectively...
October 7, 2016: British Journal of Haematology
https://www.readbyqxmd.com/read/27664394/improvement-in-survival-end-points-of-patients-with-metastatic-renal-cell-carcinoma-through-sequential-targeted-therapy
#10
Emiliano Calvo, Manuela Schmidinger, Daniel Y C Heng, Viktor Grünwald, Bernard Escudier
Survival of patients with metastatic renal cell carcinoma (mRCC) has improved since the advent of targeted therapy. Approved agents include the multi-targeted tyrosine kinase inhibitors (TKIs) sunitinib, sorafenib, axitinib, pazopanib, cabozantinib, and lenvatinib (approved in combination with everolimus), the anti-VEGF monoclonal antibody bevacizumab, the mammalian target of rapamycin (mTOR) inhibitors everolimus and temsirolimus, and the programmed death-1 (PD-1) targeted immune checkpoint inhibitor nivolumab...
September 10, 2016: Cancer Treatment Reviews
https://www.readbyqxmd.com/read/27662658/synergistic-activity-of-alk-and-mtor-inhibitors-for-the-treatment-of-npm-alk-positive-lymphoma
#11
Sara Redaelli, Monica Ceccon, Laura Antolini, Roberta Rigolio, Alessandra Pirola, Marco Peronaci, Carlo Gambacorti-Passerini, Luca Mologni
ALK-positive Anaplastic Large Cell Lymphoma (ALCL) represents a subset of Non-Hodgkin Lymphoma whose treatment benefited from crizotinib development, a dual ALK/MET inhibitor. Crizotinib blocks ALK-triggered pathways such as PI3K/AKT/mTOR, indispensable for survival of ALK-driven tumors.Despite the positive impact of targeted treatment in ALCL, resistant clones are often selected during therapy. Strategies to overcome resistance include the design of second generation drugs and the use of combined therapies that simultaneously target multiple nodes essential for cells survival...
September 20, 2016: Oncotarget
https://www.readbyqxmd.com/read/27592258/myopodin-methylation-is-a-prognostic-biomarker-and-predicts-antiangiogenic-response-in-advanced-kidney-cancer
#12
N Pompas-Veganzones, V Sandonis, Alberto Perez-Lanzac, M Beltran, P Beardo, A Juárez, F Vazquez, J M Cozar, J L Alvarez-Ossorio, Marta Sanchez-Carbayo
Myopodin is a cytoskeleton protein that shuttles to the nucleus depending on the cellular differentiation and stress. It has shown tumor suppressor functions. Myopodin methylation status was useful for staging bladder and colon tumors and predicting clinical outcome. To our knowledge, myopodin has not been tested in kidney cancer to date. The purpose of this study was to evaluate whether myopodin methylation status could be clinically useful in renal cancer (1) as a prognostic biomarker and 2) as a predictive factor of response to antiangiogenic therapy in patients with metastatic disease...
September 3, 2016: Tumour Biology: the Journal of the International Society for Oncodevelopmental Biology and Medicine
https://www.readbyqxmd.com/read/27573247/rational-design-of-a-parthenolide-based-drug-regimen-that-selectively-eradicates-acute-myelogenous-leukemia-stem-cells
#13
Shanshan Pei, Mohammad Minhajuddin, Angelo D'Alessandro, Travis Nemkov, Brett M Stevens, Biniam Adane, Nabilah Khan, Fred K Hagen, Vinod K Yadav, Subhajyoti De, John M Ashton, Kirk C Hansen, Jonathan A Gutman, Daniel A Pollyea, Peter A Crooks, Clayton Smith, Craig T Jordan
Although multidrug approaches to cancer therapy are common, few strategies are based on rigorous scientific principles. Rather, drug combinations are largely dictated by empirical or clinical parameters. In the present study we developed a strategy for rational design of a regimen that selectively targets human acute myelogenous leukemia (AML) stem cells. As a starting point, we used parthenolide, an agent shown to target critical mechanisms of redox balance in primary AML cells. Next, using proteomic, genomic, and metabolomic methods, we determined that treatment with parthenolide leads to induction of compensatory mechanisms that include up-regulated NADPH production via the pentose phosphate pathway as well as activation of the Nrf2-mediated oxidative stress response pathway...
October 14, 2016: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/27526062/effect-of-targeting-clusterin-using-ogx-011-on-antitumor-activity-of-temsirolimus-in-a-human-renal-cell-carcinoma-model
#14
Masatomo Nishikawa, Hideaki Miyake, Martin Gleave, Masato Fujisawa
BACKGROUND: It has not been well documented that the modulation of stress response mediates the efficacy of the mammalian target of rapamycin (mTOR) inhibitor in renal cell carcinoma (RCC). OBJECTIVE: The objective of this study was to investigate whether the activity of the mTOR inhibitor temsirolimus against RCC could be enhanced by OGX-011, an antisense oligodeoxynucleotide (ODN) targeting the stress-activated chaperone clusterin. METHODS: We investigated the efficacy of combined treatment with temsirolimus plus OGX-011 in a human RCC Caki-1 model focusing on the effects on apoptotic and autophagic pathways...
August 15, 2016: Targeted Oncology
https://www.readbyqxmd.com/read/27518770/mtor-inhibitors-rescue-premature-lethality-and-attenuate-dysregulation-of-gabaergic-glutamatergic-transcription-in-murine-succinate-semialdehyde-dehydrogenase-deficiency-ssadhd-a-disorder-of-gaba-metabolism
#15
Kara R Vogel, Garrett R Ainslie, K Michael Gibson
Recent studies have identified a role for supraphysiological gamma-aminobutyric acid (GABA) in the regulation of mechanistic target of rapamycin (mTOR), a protein kinase with pleiotropic roles in cellular development and homeostasis, including integration of growth factors and nutrient sensing and synaptic input in neurons (Lakhani et al. 2014; Vogel et al. 2015). Aldehyde dehydrogenase 5a1-deficient (aldh5a1 (-/-) ) mice, the murine orthologue of human succinic semialdehyde dehydrogenase deficiency (SSADHD), manifest increased GABA that disrupts mitophagy and increases mitochondria number with enhanced oxidant stress...
November 2016: Journal of Inherited Metabolic Disease
https://www.readbyqxmd.com/read/27515221/changes-in-metabolic-profile-iron-and-ferritin-levels-during-the-treatment-of-metastatic-renal-cancer-a-new-potential-biomarker
#16
Marin Golčić, Marija Petković
Metastatic renal cell carcinoma (mRCC) develops in approximately 33% of all renal cancer patients. First line treatment of mRCC includes drugs such as sunitinib, temsirolimus and pazopanib, with overall survival now reaching up to 43,6months in patients with favorable-risk metastatic disease. Several side-effects in mRCC treatment, such as hypothyroidism, can be used as positive prognostic factors and indicate good response to therapy. Hypercholesterolemia and hypertriglyceridemia independent of hypothyroidism are reported as side-effects in temsirolimus treatment and recently in sunitinib treatment, but the exact mechanism and significance of the changes remains elusive...
September 2016: Medical Hypotheses
https://www.readbyqxmd.com/read/27513367/dynamic-contrast-enhanced-computed-tomography-derived-blood-volume-and-blood-flow-correlate-with-patient-outcome-in-metastatic-renal-cell-carcinoma
#17
Jill Rachel Mains, Frede Donskov, Erik Morre Pedersen, Hans Henrik Torp Madsen, Finn Rasmussen
OBJECTIVES: The aim was to explore the potential for using dynamic contrast-enhanced computed tomography as a noninvasive functional imaging biomarker before and during the early treatment of metastatic renal cell carcinoma (mRCC). MATERIALS AND METHODS: Dynamic contrast-enhanced computed tomography scans were performed at baseline and after 5 and 10 weeks' treatment in 69 prospectively included mRCC patients receiving treatment with interferon alpha and interleukin 2 (n = 26); interferon alpha, interleukin 2, and bevacizumab (n = 24); sunitinib (n = 7); pazopanib (n = 5); or temsirolimus (n = 7)...
August 10, 2016: Investigative Radiology
https://www.readbyqxmd.com/read/27453754/metastatic-clear-cell-renal-carcinoma-an-unusual-response-to-temsirolimus-in-second-line-therapy
#18
D L Stanculeanu, A Lazescu, D D Zob, R Bunghez, R Anghel, T D Poteca
Renal cell carcinoma (RCC) represents 3% of all cancers, with the highest incidence occurring in the most developed countries and representing the seventh most common cancer in men and the ninth most common cancer in women. The understanding of the tumor molecular biology and the discovery of new drugs that target molecular pathways have increased the arsenal against advanced renal cell carcinoma and improved the outcomes in the patients suffering from these affections. Studying the molecular signaling that controls the tumor growth and the progression has led to the development of molecular therapies targeting the vascular endothelial growth factor (VEGF) and mammalian target of rapamycin (mTOR) pathways, resulting in a significant improvement in the overall survival and quality of life...
April 2016: Journal of Medicine and Life
https://www.readbyqxmd.com/read/27448573/sunitinib-in-metastatic-renal-cell-carcinoma-mrcc-a-developing-country-experience-do-our-patients-behave-differently-than-the-western-patients
#19
Mohmad Hussain Mir, Khalid Hamid Changal, Shiekh Aejaz Aziz, Gull Mohammad Bhat, Abdul Rashid Lone
BACKGROUND: Metastatic renal cell carcinoma (mRCC) has historically been refractory to cytotoxic and hormonal agents. IL-2 and IFN-α provide response in a minority of patients. Small molecule tyrosine kinase inhibitors and monoclonal antibodies have established a role in the setting of mRCC. However, there is a lack of data from the Indian subcontinent. The aim of this study was to look whether our patients behave similarly as reported in the Western data to targeted agents, especially sunitinib...
November 2016: International Urology and Nephrology
https://www.readbyqxmd.com/read/27403615/antineoplastic-treatment-and-renal-injury-an-update-on-renal-pathology-due-to-cytotoxic-and-targeted-therapies
#20
Megan L Troxell, John P Higgins, Neeraja Kambham
Cancer patients experience kidney injury from multiple sources, including the tumor itself, diagnostic procedures, hypovolemia, infection, and drug exposure, superimposed upon baseline chronic damage. This review will focus on cytotoxic or targeted chemotherapy-associated renal injury. In this setting, tubulointerstitial injury and thrombotic microangiopathy (vascular injury) are more common than other forms of kidney injury including glomerular. Cisplatin, pemetrexed, and ifosfamide are well-known causes of acute tubular injury/necrosis...
September 2016: Advances in Anatomic Pathology
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