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https://www.readbyqxmd.com/read/28925679/substance-p-mediated-dgls-complexing-with-dachpt-for-targeting-therapy-of-glioma
#1
Tao Sun, Xutao Jiang, Qingbing Wang, Qinjun Chen, Yifei Lu, Lisha Liu, Yu Zhang, Xi He, Chunhui Ruan, Yujie Zhang, Qin Guo, Yaohua Liu, Chen Jiang
Currently, glioblastoma (glioma) is described as the deadliest brain tumor for its invasive natural with exceeding difficulty in surgical excision. Blood-brain barrier (BBB) can restrict the penetration of most therapeutic reagents including platinum (Pt)-based drugs-the most widely used reagents in clinical trials for their revolutionized cancer chemotherapy against a broad range of tumors. Nanomedicine represents a promising strategy for the intravenous delivery of Pt-based drugs into the brain. In this research, with the aim of malignant glioma treatment by Pt-based drugs, a novel nano drug carrier was developed: dendrigraft poly-L-lysines (DGLs) was PEGylated, linked with diethylenetriaminpentaacetic acid (DTPA) to complex (1,2-diaminocyclohexane)platinum(II) (DACHPt), and modified with Substance P (SP) as a BBB/glioma dual-targeting moiety...
September 19, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28923612/deceased-organ-donation-from-pediatric-donors-does-the-literature-really-help-us-implication-for-more-powerful-guidelines
#2
M Mojtabaee, F Sadegh Beigee, F Ghorbani
BACKGROUND: Brain-dead pediatric donors have always been the focus of attention because of the higher quality, utility, and possibility of their organ donation. However, donors under the age of 5 years always necessitate making more challenging management efforts, which are not clearly implied in most parts of the guidelines. METHODS: The data obtained from 79 brain-dead pediatric donors of the Organ Procurement Unit of Masih Daneshvari Hospital, Tehran, Iran, were assessed...
October 2017: Transplantation Proceedings
https://www.readbyqxmd.com/read/28919446/increased-interferon-mediated-immunity-following-in-vitro-and-in-vivo-modafinil-treatment-on-peripheral-immune-cells
#3
Adriano Zager, Wesley Nogueira Brandão, Rafael Oliveira Margatho, Daniel Sanzio Gimenes Cruz, Jean Pierre Peron, Sergio Tufik, Monica Levy Andersen, Monica Moresco, Fabio Pizza, Giuseppe Plazzi, Birgitte Rahbek Kornum, João Palermo-Neto
The wake-promoting drug Modafinil has been used for treatment of sleep disorders, such as Narcolepsy, excessive daytime sleepiness and sleep apnea, due to its stimulant action. Despite the known effect of Modafinil on brain neurochemistry, particularly on brain dopamine system, recent evidence support an immunomodulatory role for Modafinil treatment in neuroinflammatory models. Here, we aimed to study the effects of in vitro and in vivo Modafinil treatment on activation, proliferation, cell viability, and cytokine production by immune cells in splenocytes culture from mice...
September 15, 2017: Progress in Neuro-psychopharmacology & Biological Psychiatry
https://www.readbyqxmd.com/read/28917711/crocodiles-and-alligators-antiamoebic-and-antitumor-compounds-of-crocodiles
#4
Ruqaiyyah Siddiqui, Shareni Jeyamogan, Salwa Mansoor Ali, Fatima Abbas, K A Sagathevan, Naveed Ahmed Khan
Crocodiles exist in unsanitary environments, feed on rotten meat, are often exposed to heavy metals such as arsenic, cadmium, cobalt, chromium, mercury, nickel, lead, selenium, tolerate high levels of radiation, and are amid the very few species to survive the catastrophic Cretaceous-Tertiary extinction event, nonetheless they can live for up to a 100 years. Moreover, as they live in unhygienic conditions, they regularly come across pathogens. Logically, we postulate that crocodiles have established mechanisms to defend themselves from noxious agents as well as protecting themselves from pathogens...
September 13, 2017: Experimental Parasitology
https://www.readbyqxmd.com/read/28912890/glioma-dual-targeting-nanohybrid-protein-toxin-constructed-by-intein-mediated-site-specific-ligation-for-multistage-booster-delivery
#5
Yingzhi Chen, Meng Zhang, Hongyue Jin, Dongdong Li, Fan Xu, Aihua Wu, Jinyu Wang, Yongzhuo Huang
Malignant glioma is one of the most untreatable cancers because of the formidable blood-brain barrier (BBB), through which few therapeutics can penetrate and reach the tumors. Biologics have been booming in cancer therapy in the past two decades, but their application in brain tumor has long been ignored due to the impermeable nature of BBB against effective delivery of biologics. Indeed, it is a long unsolved problem for brain delivery of macromolecular drugs, which becomes the Holy Grail in medical and pharmaceutical sciences...
2017: Theranostics
https://www.readbyqxmd.com/read/28911239/controlled-release-of-liposome-encapsulated-temozolomide-for-brain-tumor-treatment-by-convection-enhanced-delivery
#6
Chung-Yin Lin, Rui-Jin Li, Chiung-Yin Huang, Kuo-Chen Wei, Pin-Yuan Chen
Convection-enhanced delivery (CED) is a promising technique for the delivery of drugs directly into the central nervous system (CNS) and, more specifically, the brain. CED can increase drug concentration within a brain tumor, thereby improving the therapeutic efficacy and limiting the systemic toxicity of tumoricidal agents. In this study, we evaluated a drug-liposome construct in vitro and in vivo using U87 tumor-bearing nude mice. Dipalmitoylphosphatidylcholine (DPPC)-based liposomes were designed to deliver a lipophilic temozolomide (TMZ) formulation (LipoTMZ)...
September 15, 2017: Journal of Drug Targeting
https://www.readbyqxmd.com/read/28910516/controlling-differentiation-of-stem-cells-for-developing-personalized-organ-on-chip-platforms
#7
REVIEW
Armin Geraili, Parya Jafari, Mohsen Sheikh Hassani, Behnaz Heidary Araghi, Mohammad Hossein Mohammadi, Amir Mohammad Ghafari, Sara Hasanpour Tamrin, Hassan Pezeshgi Modarres, Ahmad Rezaei Kolahchi, Samad Ahadian, Amir Sanati-Nezhad
Organ-on-chip (OOC) platforms have attracted attentions of pharmaceutical companies as powerful tools for screening of existing drugs and development of new drug candidates. OOCs have primarily used human cell lines or primary cells to develop biomimetic tissue models. However, the ability of human stem cells in unlimited self-renewal and differentiation into multiple lineages has made them attractive for OOCs. The microfluidic technology has enabled precise control of stem cell differentiation using soluble factors, biophysical cues, and electromagnetic signals...
September 14, 2017: Advanced Healthcare Materials
https://www.readbyqxmd.com/read/28904856/mir-101-inhibits-ovarian-carcinogenesis-by-repressing-the-expression-of-brain-derived-neurotrophic-factor
#8
Ying Xu, Lei Xu, Jianbin Zheng, Lei Geng, Shuping Zhao
Ovarian cancer is one of the most lethal malignant gynecological tumors as a result of difficulties in early-stage detection and a lack of effective treatments for patients with advanced or recurrent cancer. In the present study, we aimed to explore whether some of the microRNA (miRNA) content of serum might be related to ovarian cancer, as well as the role of these miRNAs and their intercellular transport via exosomes in ovarian cancer. We first detected the expression of six candidate miRNAs in ovarian cancer tissues and adjacent nontumor ovarian samples from 36 patients and confirmed the altered expression of four miRNAs...
September 2017: FEBS Open Bio
https://www.readbyqxmd.com/read/28903061/lymphatic-drainage-system-of-the-brain-a-novel-target-for-intervention-of-neurological-diseases
#9
REVIEW
Bao-Liang Sun, Li-Hua Wang, Tuo Yang, Lei-Lei Mao, Jing-Yi Sun, Ming-Feng Yang, Hui Yuan, Robert A Colvin, Xiao-Yi Yang
The belief that the vertebrate brain functions normally without classical lymphatic drainage vessels has been held for many decades. On the contrary, new findings show that functional lymphatic drainage does exist in the brain. The brain lymphatic drainage system is composed of basement membrane-based perivascular pathway, a brain-wide glymphatic pathway, and cerebrospinal fluid (CSF) drainage routes including sinus-associated meningeal lymphatic vessels and olfactory/cervical lymphatic routes. The brain lymphatic systems function physiological as a route of drainage for interstitial fluid (ISF) from brain parenchyma to nearby lymph nodes...
September 10, 2017: Progress in Neurobiology
https://www.readbyqxmd.com/read/28901268/nrg1-erbb-lost-in-translation-a-new-paradigm-for-lung-cancer
#10
Domenico Trombetta, Antonio Rossi, Federico Pio Fabrizio, A Sparaneo, Paolo Graziano, Vito Michele Fazio, Lucia Anna Muscarella
The ErbB network of receptor tyrosine kinases represents one of the best examples of how the understanding of molecular basis of tumor pathogenesis can give a significant improvement for patients treatment, suggesting new therapeutic options to overcome acquired treatment resistance. This amazing bridge between growth factor receptors and cancer has been consolidated during the last decades through the identification of many driver mutations in the gene key of the RTKs network. Unexpected molecular lesions of the NRG1 gene followed by an aberrant ErbB signaling were recently described as a new molecular features of non-small cell lung cancer, but it has been also sporadically reported in other tumors...
September 11, 2017: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/28900896/fusion-of-gelonin-and-anti-insulin-like-growth-factor-1-receptor-igf-1r-affibody-for-enhanced-brain-cancer-therapy
#11
Songhee Ham, Kyoung Ah Min, Jae Wook Yang, Meong Cheol Shin
Owing to the extraordinary potency in inhibiting protein translation that could eventually lead to apoptosis of tumor cells, ribosome-inactivating proteins (RIPs) such as gelonin have been considered attractive drug candidates for cancer therapy. However, due to several critical obstacles (e.g., severe toxicity issues caused by a lack of selectivity in their mode of action and the low cytotoxicity via poor cellular uptake, etc.), clinical application of RIPs is yet far from being accomplished. To overcome these challenges, in the present study, we engineered gelonin fusion proteins with anti-insulin-like growth factor-1 receptor (IGF-1R) affibody ("IAFF") via the genetic recombinant method and the SpyCatcher/SpyTag-mediated conjugation method...
September 12, 2017: Archives of Pharmacal Research
https://www.readbyqxmd.com/read/28900598/cationic-pegylated-polycaprolactone-nanoparticles-carrying-post-operation-docetaxel-for-glioma-treatment
#12
Cem Varan, Erem Bilensoy
Background: Brain tumors are the most common tumors among adolescents. Although some chemotherapeutics are known to be effective against brain tumors based on cell culture studies, the same effect is not observed in clinical trials. For this reason, the development of drug delivery systems is important to treat brain tumors and prevent tumor recurrence. The aim of this study was to develop core-shell polymeric nanoparticles with positive charge by employing a chitosan coating. Additionally, an implantable formulation for the chemotherapeutic nanoparticles was developed as a bioadhesive film to be applied at the tumor site following surgical operation for brain glioma treatment...
2017: Beilstein Journal of Nanotechnology
https://www.readbyqxmd.com/read/28892308/targeting-epidermal-growth-factor-receptor-co-dependent-signaling-pathways-in-glioblastoma
#13
Feng Liu, Paul S Mischel
The epidermal growth factor receptor (EGFR) is a transmembrane receptor tyrosine kinase (RTK) that is critical for normal development and function. EGFR is also amplified or mutated in a variety of cancers including in nearly 60% of cases of the highly lethal brain cancer glioblastoma (GBM). EGFR amplification and mutation reprogram cellular metabolism and broadly alter gene transcription to drive tumor formation and progression, rendering EGFR as a compelling drug target. To date, brain tumor patients have yet to benefit from anti-EGFR therapy due in part to an inability to achieve sufficient intratumoral drug levels in the brain, cultivating adaptive mechanisms of resistance...
September 11, 2017: Wiley Interdisciplinary Reviews. Systems Biology and Medicine
https://www.readbyqxmd.com/read/28887134/decreased-non-specific-adhesivity-receptor-targeted-dart-nanoparticles-exhibit-improved-dispersion-cellular-uptake-and-tumor-retention-in-invasive-gliomas
#14
Aniket S Wadajkar, Jimena G Dancy, Nathan B Roberts, Nina P Connolly, Dudley K Strickland, Jeffrey A Winkles, Graeme F Woodworth, Anthony J Kim
The most common and deadly form of primary brain cancer, glioblastoma (GBM), is characterized by significant intratumoral heterogeneity, microvascular proliferation, immune system suppression, and brain tissue invasion. Delivering effective and sustained treatments to the invasive GBM cells intermixed with functioning neural elements is a major goal of advanced therapeutic systems for brain cancer. Previously, we investigated the nanoparticle characteristics that enable targeting of invasive GBM cells. This revealed the importance of minimizing non-specific binding within the relatively adhesive, 'sticky' microenvironment of the brain and brain tumors in particular...
September 5, 2017: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/28885119/volume-of-distribution-and-clearance-of-peptide-based-nanofiber-after-convection-enhanced-delivery
#15
Ranjodh Singh, Vanessa Bellat, Melinda Wang, Melanie E Schweitzer, Y Linda Wu, Ching-Hsuan Tung, Mark M Souweidane, Benedict Law
OBJECTIVE Drug clearance may be a limiting factor in the clinical application of convection-enhanced delivery (CED). Peptide-based nanofibers (NFPs) have a high aspect ratio, and NFPs loaded with drugs could potentially maintain effective drug concentrations for an extended period sufficient for cancer therapy. The objective of this study was to assess the volume of distribution (Vd) and clearance of variable lengths of NFPs when administered using CED. METHODS NFPs composed of multiple methoxypolyethylene glycol (mPEG)-conjugated constructs (mPEG2000-KLDLKLDLKLDL-K( FITC)-CONH2, for which FITC is fluorescein isothiocyanate) were assembled in an aqueous buffer...
September 8, 2017: Journal of Neurosurgery
https://www.readbyqxmd.com/read/28883869/ataxia-in-childhood-epidemiological-clinical-and-neuroradiologic-features-and-the-risk-of-recurrence
#16
REVIEW
Mohsen Javadzadeh, Masoud Hassanvand Amouzadeh, Shaghayegh Sadat Esmail Nejad, Ezatollah Abasi, Abbas Alipour, Mohsen Mollamohammadi
OBJECTIVE: This study was conducted on the demographic data, clinical characteristics, electroencephalography, neuroradiological findings, and their impact on the recurrence of ataxia. MATERIALS & METHODS: A 3-yr retrospective review of 49 children with ataxia in Mofid Children Hospital, Tehran, Iran was conducted from Apr 2013 to Apr 2016. The demographic, clinical and paraclinical data were recorded in pre-prepared questionnaires. The patients were also classified in two groups of with or without recurrence and the results were compared...
2017: Iranian Journal of Child Neurology
https://www.readbyqxmd.com/read/28877739/estrogen-and-soy-isoflavonoids-decrease-sensitivity-of-medulloblastoma-and-central-nervous-system-primitive-neuroectodermal-tumor-cells-to-chemotherapeutic-cytotoxicity
#17
Scott M Belcher, Caleb C Burton, Clifford J Cookman, Michelle Kirby, Gabriel L Miranda, Fatima O Saeed, Kathleen E Wray
BACKGROUND: Our previous studies demonstrated that growth and migration of medulloblastoma (MB), the most common malignant brain tumor in children, are stimulated by 17β-estradiol. The growth stimulating effects of estrogens are mediated through ERβ and insulin-like growth factor 1 signaling to inhibit caspase 3 activity and reduce tumor cell apoptosis. The objective of this study was to determine whether estrogens decreased sensitivity of MB cells to cytotoxic actions of chemotherapeutic drugs...
September 6, 2017: BMC Pharmacology & Toxicology
https://www.readbyqxmd.com/read/28877265/niclosamide-induces-protein-ubiquitination-and-inhibits-multiple-pro-survival-signaling-pathways-in-the-human-glioblastoma-u-87-mg-cell-line
#18
Benxu Cheng, Liza Doreen Morales, Yonghong Zhang, Shizue Mito, Andrew Tsin
Glioblastoma is the most common and lethal malignant primary brain tumor for which the development of efficacious chemotherapeutic agents remains an urgent need. The anti-helminthic drug niclosamide, which has long been in use to treat tapeworm infections, has recently attracted renewed interest due to its apparent anticancer effects in a variety of in vitro and in vivo cancer models. However, the mechanism(s) of action remains to be elucidated. In the present study, we found that niclosamide induced cell toxicity in human glioblastoma cells corresponding with increased protein ubiquitination, ER stress and autophagy...
2017: PloS One
https://www.readbyqxmd.com/read/28875440/targeting-brain-tumors-by-intra-arterial-delivery-of-cell-penetrating-peptides-a-novel-approach-for-primary-and-metastatic-brain-malignancy
#19
Shailendra Joshi, Johann R N Cooke, Jason A Ellis, Charles W Emala, Jeffrey N Bruce
Computational modeling shows that intra-arterial delivery is most efficient when the delivered drugs rapidly and avidly bind to the target site. The cell-penetrating peptide trans-activator of transcription (TAT) is a candidate carrier molecule that could mediate such specificity for brain tumor chemotherapeutics. To test this hypothesis we first performed in vitro studies testing the uptake of TAT by one primary and three potentially metastatic brain cancer cell lines (9L, 4T-1, LLC, SKOV-3). Then we performed in vivo studies in a rat model where TAT was delivered either intra-arterially (IA) or intravenously (IV) to 9L brain tumors...
September 5, 2017: Journal of Neuro-oncology
https://www.readbyqxmd.com/read/28870843/phosphatidylserine-a-cancer-cell-targeting-biomarker
#20
REVIEW
Bhupender Sharma, Shamsher S Kanwar
Cancer is a leading cause of mortality and morbidity globally. Many prominent cancer-associated molecules have been identified over the recent years which include EGFR, CD44, TGFbRII, HER2, miR-497, NMP22, BTA, Fibrin/FDP etc. These biomarkers are often used for screening, detection, diagnosis, prognosis, prediction and monitoring of cancer development. Phosphatidylserine (PS) is an essential component in all human cells which is present on the inner leaflet of the cell membrane. The oxidative stress causes exposure of PS on the surface of the vascular endothelium in the cancer cells (lung, breast, pancreatic, bladder, skin, brain metastasis, rectal adenocarcinoma etc...
September 1, 2017: Seminars in Cancer Biology
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