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Brain tumor stem cell

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https://www.readbyqxmd.com/read/29790744/myristic-acid-modified-da7r-peptide-for-whole-process-glioma-targeted-drug-delivery
#1
Man Ying, Songli Wang, Mingfei Zhang, Ruifeng Wang, Hangchang Zhu, Huitong Ruan, Danni Ran, Zhilan Chai, Xiaoyi Wang, Weiyue Lu
Clinical treatment of aggressive glioma has been a great challenge, mainly due to the complexity of glioma microenvironment and the existence of blood-brain tumor barrier (BBTB)/blood-brain barrier (BBB), which severely hamper the effective accumulation of most therapeutic agents in glioma region. Additionally, vasculogenic mimicry (VM), angiogenesis and glioma stem cells (GSC) in malignant glioma also lead to the failure of clinical therapy. To address the aforementioned issues, a whole-process glioma targeted drug delivery strategy was proposed...
May 23, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29790427/simulated-microgravity-culture-enhances-the-neuroprotective-effects-of-human-cranial-bone-derived-mesenchymal-stem-cells-in-traumatic-brain-injury
#2
Takashi Otsuka, Takeshi Imura, Kei Nakagawa, Looniva Shrestha, Shinya Takahashi, Yumi Kawahara, Taijiro Sueda, Kaoru Kurisu, Louis Yuge
Fundamental cures of central nervous system (CNS) diseases are rarely achieved due to the low regenerative ability of the CNS. Recently, cell-based therapy using mesenchymal stem cells (MSCs) has been explored as effective treatments for CNS diseases. Among the various tissue-derived MSCs, we have isolated human cranial bone-derived MSCs (cMSCs) in our laboratory. In addition, we have focused on simulated microgravity (MG) as a valuable culture environment of MSCs. However, the detailed mechanisms underlying functional recovery from the transplantation of MSCs cultured under MG conditions remain unclear...
May 23, 2018: Stem Cells and Development
https://www.readbyqxmd.com/read/29789464/role-of-mtor-complexes-in-neurogenesis
#3
REVIEW
Francesca LiCausi, Nathaniel W Hartman
Dysregulation of neural stem cells (NSCs) is associated with several neurodevelopmental disorders, including epilepsy and autism spectrum disorder. The mammalian target of rapamycin (mTOR) integrates the intracellular signals to control cell growth, nutrient metabolism, and protein translation. mTOR regulates many functions in the development of the brain, such as proliferation, differentiation, migration, and dendrite formation. In addition, mTOR is important in synaptic formation and plasticity. Abnormalities in mTOR activity is linked with severe deficits in nervous system development, including tumors, autism, and seizures...
May 22, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29780259/delivery-of-bevacizumab-by-intracranial-injection-assessment-in-glioma-model
#4
Yu-Xiao Liu, Wen-Jia Liu, Hui-Ru Zhang, Zhi-Wen Zhang
Background: Many reports have indicated that the intravenous administration of bevacizumab produces a number of systemic side effects. Therefore, we investigated the therapeutic effects of intratumoral bevacizumab administration using a glioma animal model. Methods: The glioma cell lines U251 and U87 that carried luciferase were implanted into the brains of mice to develop glioma models. Glioma-bearing mice were treated with bevacizumab intravenously or intratumorally by Alzet micro-osmotic pumps, and the survival time of mice was monitored...
2018: OncoTargets and Therapy
https://www.readbyqxmd.com/read/29774132/natural-products-a-hope-for-glioblastoma-patients
#5
REVIEW
Raghupathy Vengoji, Muzafar A Macha, Surinder K Batra, Nicole A Shonka
Glioblastoma (GBM) is one of the most aggressive malignant tumors with an overall dismal survival averaging one year despite multimodality therapeutic interventions including surgery, radiotherapy and concomitant and adjuvant chemotherapy. Few drugs are FDA approved for GBM, and the addition of temozolomide (TMZ) to standard therapy increases the median survival by only 2.5 months. Targeted therapy appeared promising in in vitro monolayer cultures, but disappointed in preclinical and clinical trials, partly due to the poor penetration of drugs through the blood brain barrier (BBB)...
April 24, 2018: Oncotarget
https://www.readbyqxmd.com/read/29773872/computational-identification-of-specific-genes-for-glioblastoma-stem-like-cells-identity
#6
Giulia Fiscon, Federica Conte, Valerio Licursi, Sergio Nasi, Paola Paci
Glioblastoma, the most malignant brain cancer, contains self-renewing, stem-like cells that sustain tumor growth and therapeutic resistance. Identifying genes promoting stem-like cell differentiation might unveil targets for novel treatments. To detect them, here we apply SWIM - a software able to unveil genes (named switch genes) involved in drastic changes of cell phenotype - to public datasets of gene expression profiles from human glioblastoma cells. By analyzing matched pairs of stem-like and differentiated glioblastoma cells, SWIM identified 336 switch genes, potentially involved in the transition from stem-like to differentiated state...
May 17, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29765540/could-a-plant-derived-protein-potentiate-the-anticancer-effects-of-a-stem-cell-in-brain-cancer
#7
Camila Ramalho Bonturi, Helena Motaln, Mariana Cristina Cabral Silva, Bruno Ramos Salu, Marlon Vilela de Brito, Luciana de Andrade Luz Cost, Heron Fernandes Vieira Torquato, Natalia Neto Dos Santos Nunes, Edgar Julian Paredes-Gamero, Tamara Lah Turnšek, Maria Luiza Vilela Oliva
Glioblastoma is the most aggressive brain tumor with poor overall survival bellow 2 years. The natural compounds with anti-cancer properties, are thus gaining attention for possible adjuvant GBM treatment. In various cancer models Enterolobium contortisiliquum Trypsin Inhibitor (EcTI) proved to have anti-cancer effects. Here, we investigated the EcTI effects on GBM U87 cells and on mesenchymal stem cells (MSC) compared to their direct coculture (MSC/U87). MSC are present in tumor stroma, modulating GBM cells phenotype, and also represent potential drug delivery vehicle due to their tumor tropism...
April 20, 2018: Oncotarget
https://www.readbyqxmd.com/read/29758594/phox2b-is-a-reliable-immunomarker-in-distinguishing-peripheral-neuroblastic-tumors-from-cns-embryonal-tumors
#8
Sanda Alexandrescu, Vera Paulson, Adrian Dubuc, Azra Ligon, Hart G Lidov
INTRODUCTION: The PHOX2B gene regulates neuronal maturation in the brain stem nuclei associated with cardiorespiratory function, and in the autonomic sympathetic and enteric nervous system. PHOX2B expression is a reliable immunomarker for peripheral neuroblastic tumors, however no systematic evaluation of CNS embryonal tumors was included in the studies. We encountered two cases in which the differential diagnosis included neuroblastoma and CNS embryonal tumor, and we hypothesized that PHOX2B immunostain would be helpful establishing the diagnosis...
May 14, 2018: Histopathology
https://www.readbyqxmd.com/read/29755678/functional-invadopodia-formed-in-glioblastoma-stem-cells-are-important-regulators-of-tumor-angiogenesis
#9
Christos Petropoulos, Pierre-Olivier Guichet, Konstantin Masliantsev, Michel Wager, Lucie Karayan-Tapon
Glioblastoma (GBM) represents the most common and lethal brain tumor. High vascularization, necrosis and invasiveness are hallmarks of GBM aggressiveness with recent data suggesting the important role of glioblastoma stem cells (GSCs) in these processes. It is now well established that cancer cells employ specialized structures termed invadosomes to potentiate invasion. However, the role of these structures in GBM dissemination remains poorly investigated. In this study, we showed that GBM-isolated GSCs form invadopodia-like protrusions endowed with degradative action...
April 17, 2018: Oncotarget
https://www.readbyqxmd.com/read/29755127/a-novel-long-non-coding-rna-linc-znf469-3-promotes-lung-metastasis-through-mir-574-5p-zeb1-axis-in-triple-negative-breast-cancer
#10
Po-Shun Wang, Cheng-Han Chou, Cheng-Han Lin, Yun-Chin Yao, Hui-Chuan Cheng, Hao-Yi Li, Yu-Chung Chuang, Chia-Ning Yang, Luo-Ping Ger, Yu-Chia Chen, Forn-Chia Lin, Tang-Long Shen, Michael Hsiao, Pei-Jung Lu
Triple-negative breast cancer (TNBC) patients usually lead to poor prognosis and survival because of metastasis. The major sites for TNBC metastasis include the lungs, brain, liver, and bone. Long non-coding RNAs (lncRNAs) are non-protein-coding transcripts longer than 200 nucleotides and have been reported as important regulators in BC metastasis. However, the underlying mechanisms for lncRNAs regulating TNBC metastasis are not fully understood. Here we found that linc-ZNF469-3 was highly expressed in lung-metastatic LM2-4175 TNBC cells and overexpression of linc-ZNF469-3 enhanced invasion ability and stemness properties in vitro and lung metastasis in vivo...
May 14, 2018: Oncogene
https://www.readbyqxmd.com/read/29750582/a-cytotoxic-three-dimensional-spheroid-high-throughput-assay-using-patient-derived-glioma-stem-cells
#11
Victor Quereda, Shurong Hou, Franck Madoux, Louis Scampavia, Timothy P Spicer, Derek Duckett
Glioblastoma (GBM) is the most aggressive primary brain cancer with an average survival time after diagnosis of only 12-14 months, with few (<5%) long-term survivors. A growing body of work suggests that GBMs contain a small population of glioma stem cells (GSCs) that are thought to be major contributors to treatment resistance and disease relapse. Identifying compounds that modulate GSC proliferation would provide highly valuable molecular probes of GSC-directed signaling. However, targeting GSCs pharmacologically has been challenging...
May 1, 2018: SLAS Discovery
https://www.readbyqxmd.com/read/29749540/personalized-regulation-of-glioblastoma-cancer-stem-cells-based-on-biomedical-technologies-from-theory-to-experiment-review
#12
Igor Bryukhovetskiy, Arina Ponomarenko, Irina Lyakhova, Sergey Zaitsev, Yulia Zayats, Maria Korneyko, Marina Eliseikina, Polina Mischenko, Valerie Shevchenko, Hari Shanker Sharma, Aruna Sharma, Yuri Khotimchenko
Glioblastoma multiforme (GBM) is one of the most aggressive brain tumors. GBM represents >50% of primary tumors of the nervous system and ~20% of intracranial neoplasms. Standard treatment involves surgery, radiation and chemotherapy. However, the prognosis of GBM is usually poor, with a median survival of 15 months. Resistance of GBM to treatment can be explained by the presence of cancer stem cells (CSCs) among the GBM cell population. At present, there are no effective therapeutic strategies for the elimination of CSCs...
May 10, 2018: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/29749459/ctrp9-ameliorates-cellular-senescence-via-pgc%C3%A2-1%C3%AE-ampk-signaling-in-mesenchymal-stem-cells
#13
Qun Li, Zhangzhang Zhu, Chengde Wang, Lin Cai, Jianglong Lu, Yongchun Wang, Jiadong Xu, Zhipeng Su, Weiming Zheng, Xianbin Chen
Stroke is the second most common cause of death worldwide, and thus, it imposes great financial burdens on both individuals and society. Mesenchymal stem cell (MSC) therapy is a promising approach for ischemic brain injury. However, MSC treatment potential is progressively reduced with age, limiting their therapeutic efficacy for brain repair post‑stroke. C1q and tumor necrosis factor‑related protein 9 (CTRP9) is a novel cytoprotective cytokine with antioxidant effects, which is highly expressed in brain tissue...
May 9, 2018: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/29746930/biomimetic-models-to-examine-microenvironmental-regulation-of-glioblastoma-stem-cells
#14
Pinaki S Nakod, Yonghyun Kim, Shreyas S Rao
Glioblastoma multiforme (GBM), a malignant brain tumor, is the deadliest form of human cancer with low survival rates because of its highly invasive nature. In recent years, there has been a growing appreciation for the role that glioblastoma stem cells (GSCs) play during tumorigenesis and tumor recurrence of GBM. GSCs are a specialized subset of GBM cells with stem cell-like features that contribute to tumor initiation and therapeutic resistance. Thus, to enhance therapeutic efficiency and improve survival, targeting GSCs and their microenvironmental niche appears to be a promising approach...
May 7, 2018: Cancer Letters
https://www.readbyqxmd.com/read/29742883/tandem-high-dose-chemotherapy-and-autologous-stem-cell-transplantation-in-children-with-brain-tumors-review-of-single-center-experience
#15
REVIEW
Ki Woong Sung, Do Hoon Lim, Hyung Jin Shin
The prognosis of brain tumors in children has improved for last a few decades. However, the prognosis remains dismal in patients with recurrent brain tumors. The outcome for infants and young children in whom the use of radiotherapy (RT) is very limited because of unacceptable long-term adverse effect of RT remains poor. The prognosis is also not satisfactory when a large residual tumor remains after surgery or when leptomeningeal seeding is present at diagnosis. In this context, a strategy using high-dose chemotherapy and autologous stem cell transplantation (HDCT/auto-SCT) has been explored to improve the prognosis of recurrent or high-risk brain tumors...
May 2018: Journal of Korean Neurosurgical Society
https://www.readbyqxmd.com/read/29742423/cdk5-inhibition-resolves-pka-camp-independent-activation-of-creb1-signaling-in-glioma-stem-cells
#16
Subhas Mukherjee, Carol Tucker-Burden, Emily Kaissi, Austin Newsam, Hithardhi Duggireddy, Monica Chau, Changming Zhang, Bhakti Diwedi, Manali Rupji, Sandra Seby, Jeanne Kowalski, Jun Kong, Renee Read, Daniel J Brat
Cancer stem cells promote neoplastic growth, in part by deregulating asymmetric cell division and enhancing self-renewal. To uncover mechanisms and potential therapeutic targets in glioma stem cell (GSC) self-renewal, we performed a genetic suppressor screen for kinases to reverse the tumor phenotype of our Drosophila brain tumor model and identified dCdk5 as a critical regulator. CDK5, the human ortholog of dCdk5 (79% identity), is aberrantly activated in GBMs and tightly aligned with both chromosome 7 gains and stem cell markers affecting tumor-propagation...
May 8, 2018: Cell Reports
https://www.readbyqxmd.com/read/29736738/glioblastoma-niches-from-the-concept-to-the-phenotypical-reality
#17
Davide Schiffer, Marta Mellai, Enrica Bovio, Ilaria Bisogno, Cristina Casalone, Laura Annovazzi
Recently, the concept of niches as sites of tumor progression, invasion, and angiogenesis in glioblastoma (GB) has been extensively debated. Niches, considered the sites in which glioblastoma stem cells (GSCs) reside, have been classified as perivascular, perinecrotic, and invasive. However, from a neuropathological point of view, it is not easy to establish when a tumor structure can be considered a niche. The relevant literature has been reviewed in the light of our recent experience on the subject. As for perinecrotic niches, the occurrence of GSCs around necrosis is interpreted as triggered by hypoxia through HIF-1α...
May 8, 2018: Neurological Sciences
https://www.readbyqxmd.com/read/29734672/meta-analysis-and-experimental-validation-identified-frem2-and-spry1-as-new-glioblastoma-marker-candidates
#18
Marko Vidak, Ivana Jovcevska, Neja Samec, Alja Zottel, Mirjana Liovic, Damjana Rozman, Saso Dzeroski, Peter Juvan, Radovan Komel
Glioblastoma (GB) is the most aggressive brain malignancy. Although some potential glioblastoma biomarkers have already been identified, there is a lack of cell membrane-bound biomarkers capable of distinguishing brain tissue from glioblastoma and/or glioblastoma stem cells (GSC), which are responsible for the rapid post-operative tumor reoccurrence. In order to find new GB/GSC marker candidates that would be cell surface proteins (CSP), we have performed meta-analysis of genome-scale mRNA expression data from three data repositories (GEO, ArrayExpress and GLIOMASdb)...
May 4, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29728368/-in-vivo-expansion-of-functionally-integrated-gabaergic-interneurons-by-targeted-increase-in-neural-progenitors
#19
Rachel E Shaw, Benjamin Kottler, Zoe N Ludlow, Edgar Buhl, Dongwook Kim, Sara Morais da Silva, Alina Miedzik, Antoine Coum, James Jl Hodge, Frank Hirth, Rita Sousa-Nunes
A central hypothesis for brain evolution is that it might occur via expansion of progenitor cells and subsequent lineage-dependent formation of neural circuits. Here, we report in vivo amplification and functional integration of lineage-specific circuitry in Drosophila Levels of the cell fate determinant Prospero were attenuated in specific brain lineages within a range that expanded not only progenitors but also neuronal progeny, without tumor formation. Resulting supernumerary neural stem cells underwent normal functional transitions, progressed through the temporal patterning cascade, and generated progeny with molecular signatures matching source lineages...
May 4, 2018: EMBO Journal
https://www.readbyqxmd.com/read/29718345/pi3k-activation-in-neural-stem-cells-drives-tumorigenesis-which-can-be-ameliorated-by-targeting-the-camp-response-element-binding-creb-protein
#20
Paul M Daniel, Gulay Filiz, Daniel V Brown, Michael Christie, Paul M Waring, Yi Zhang, John M Haynes, Colin Pouton, Dustin Flanagan, Elizabeth Vincan, Terrance G Johns, Karen Montgomery, Wayne A Phillips, Theo Mantamadiotis
Background: Hyperactivation of PI3K signaling is common in cancers but the precise role of the pathway in glioma biology remains to be determined. Some understanding of PI3K signaling mechanisms in brain cancer comes from studies on neural stem/progenitor cells, where signals transmitted via the PI3K pathway cooperate with other intracellular pathways and downstream transcription factors to regulate critical cell functions. Methods: To investigate the role for the PI3K pathway in glioma initiation and development, we generated a mouse model targeting the inducible expression of a PIK3CAH1047A oncogenic mutant and deletion of the PI3K negative regulator, PTEN, to neural stem/progenitor cells (NSPCs)...
April 30, 2018: Neuro-oncology
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