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https://www.readbyqxmd.com/read/28431327/dendrimer-conjugated-iron-oxide-nanoparticles-as-stimuli-responsive-drug-carriers-for-thermally-activated-chemotherapy-of-cancer
#1
Saumya Nigam, Dhirendra Bahadur
In recent years, functional nanomaterials have found an appreciable place in the understanding and treatment of cancer. This work demonstrates the fabrication and characterization of a new class of cationic, biocompatible, peptide dendrimers, which were then used for stabilizing and functionalizing magnetite nanoparticles for combinatorial therapy of cancer. The synthesized peptide dendrimers have an edge over the widely used PAMAM dendrimers due to better biocompatibility and negligible cytotoxicity of their degradation products...
April 13, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28427421/cerebrospinal-fluid-csf-biomarkers-of-iron-status-are-associated-with-csf-viral-load-antiretroviral-therapy-and-demographic-factors-in-hiv-infected-adults
#2
Stephanie M Patton, Quan Wang, Todd Hulgan, James R Connor, Peilin Jia, Zhongming Zhao, Scott L Letendre, Ronald J Ellis, William S Bush, David C Samuels, Donald R Franklin, Harpreet Kaur, Jennifer Iudicello, Igor Grant, Asha R Kallianpur
BACKGROUND: HIV-associated neurocognitive disorder (HAND) remains common, despite antiretroviral therapy (ART). HIV dysregulates iron metabolism, but cerebrospinal fluid (CSF) levels of iron and iron-transport proteins in HIV-infected (HIV+) persons are largely unknown. The objectives of this study were to characterize CSF iron-related biomarkers in HIV+ adults and explore their relationships to known predictors of HAND. METHODS: We quantified total iron, transferrin and heavy-chain (H)-ferritin by immunoassay in CSF sampled by lumbar puncture in 403 HIV+ participants in a multi-center, observational study and evaluated biomarker associations with demographic and HIV-related correlates of HAND [e...
April 21, 2017: Fluids and Barriers of the CNS
https://www.readbyqxmd.com/read/28421565/iron-homeostasis-in-inflammation-a-single-centre-prospective-observational-study-in-medical-inpatients
#3
Carl Chrobak, Jan Adam Sidler, Alix O'Meara, Sabine Schaedelin, Balthasar L Hug
AIMS OF THE STUDY: We aimed to assess a potential association of iron status with mortality and morbidity of inpatients with systemic inflammation. METHODS: This was a single centre prospective observational study. From April 2014 to October 2014, all consecutive medical inpatients aged >=18 years with a C-reactive protein value >5 mg/l on hospital admission were eligible for the study. We excluded pregnant women and patients with terminal renal insufficiency or past allogeneic stem cell transplantation...
April 19, 2017: Swiss Medical Weekly
https://www.readbyqxmd.com/read/28419408/iron-chelating-therapy-with-deferasirox-in-transfusion-dependent-higher-risk-myelodysplastic-syndromes-a-retrospective-multicentre-study
#4
Pellegrino Musto, Luca Maurillo, Vittorio Simeon, Antonella Poloni, Carlo Finelli, Enrico Balleari, Alessandra Ricco, Flavia Rivellini, Agostino Cortelezzi, Giuseppe Tarantini, Oreste Villani, Giovanna Mansueto, Maria R Milella, Daniele Scapicchio, Gioacchino Marziano, Massimo Breccia, Pasquale Niscola, Alessandro Sanna, Cristina Clissa, Maria T Voso, Susanna Fenu, Adriano Venditti, Valeria Santini, Emanuele Angelucci, Alessandro Levis
Iron chelation is controversial in higher risk myelodysplastic syndromes (HR-MDS), outside the allogeneic transplant setting. We conducted a retrospective, multicentre study in 51 patients with transfusion-dependent, intermediate-to-very high risk MDS, according to the revised international prognostic scoring system, treated with the oral iron chelating agent deferasirox (DFX). Thirty-six patients (71%) received azacitidine concomitantly. DFX was given at a median dose of 1000 mg/day (range 375-2500 mg) for a median of 11 months (range 0·4-75)...
April 17, 2017: British Journal of Haematology
https://www.readbyqxmd.com/read/28419319/influence-of-concentration-nanoparticle-size-beam-energy-and-material-on-dose-enhancement-in-radiation-therapy
#5
Chulhwan Hwang, Ja Mee Kim, JungHoon Kim
The purpose of this study was to analyse the effects of the type, concentration, and nanoparticle diameter of dose enhancement materials on the dose enhancement of low- and high-energy megavoltage (MV) X-rays acquired from a medical linear accelerator using Monte Carlo simulation. Monte Carlo simulation was performed with the Monte Carlo N-Particle Transport (MCNPX) code, using the energy spectrum of the linear accelerator and a mathematical Snyder head phantom. A 5-cm-diameter virtual tumour was defined in the centre of the phantom...
April 17, 2017: Journal of Radiation Research
https://www.readbyqxmd.com/read/28419087/novel-targeted-therapy-for-neuroblastoma-silencing-the-mxd3-gene-using-sirna
#6
Connie Duong, Sakiko Yoshida, Cathy Chen, Gustavo Barisone, Elva Diaz, Yueju Li, Laurel Beckett, Jong Chung, Reuben Antony, Jan Nolta, Nitin Nitin, Noriko Satake
BACKGROUND: Neuroblastoma is the second most common extracranial cancer in children. Current therapies for neuroblastoma, which use a combination of chemotherapy drugs, have limitations for high-risk subtypes and can cause significant long-term adverse effects in young patients. Therefore, a new therapy is needed. In this study, we investigated the transcription factor MXD3 as a potential therapeutic target in neuroblastoma. METHODS: MXD3 expression was analyzed in five neuroblastoma cell lines by immunocytochemistry and quantitative real time reverse transcription PCR and in 18 primary patient tumor samples by immunohistochemistry...
April 18, 2017: Pediatric Research
https://www.readbyqxmd.com/read/28416170/hepcidin-serum-levels-and-resistance-to-recombinant-human-erythropoietin-therapy-in-hemodialysis-patients
#7
Kristina Petrulienė, Edita Žiginskienė, Vytautas Kuzminskis, Irena Nedzelskienė, Inga Arūnė Bumblytė
OBJECTIVE: The aim of this study was to analyze the factors that are associated with the response to erythropoiesis-stimulating agents (ESAs) and its association with hospitalization and mortality rates; to evaluate the serum hepcidin level and its associations with iron profile, inflammatory markers, ESA responsiveness, and mortality; and to determine independent factors affecting ERI and hepcidin. MATERIALS AND METHODS: To evaluate a dose-response effect of ESAs we used the erythropoietin resistance index (ERI)...
March 31, 2017: Medicina
https://www.readbyqxmd.com/read/28415433/multifunctional-nanospheres-for-co-delivery-of-methotrexate-and-mild-hyperthermia-to-colon-cancer-cells
#8
Sofia A Costa Lima, André Gaspar, Salette Reis, Luísa Durães
A multifunctional nanomedicine platform was designed and evaluated for efficient colon cancer therapy by a combinatorial therapeutic approach based on a chemotherapeutic drug and mild hyperthermia. Advantage was taken from the dual role of methotrexate (MTX), as folate receptor-targeting, overexpressed in tumor cells, and as anticancer drug. Incorporation of superparamagnetic iron oxide nanoparticles (SPIONs) allows to heat cancer cells externally through an alternating magnetic field. The developed nanocarrier was based on polyethylene glycol-polylactic acid (PEG-PLA) nanospheres to improve biocompatibility, enhancing their targeting by prolonging blood circulation time...
June 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28415402/fattigation-platform-theranostic-nanoparticles-for-cancer-therapy
#9
Thao Truong-Dinh Tran, Phuong Ha-Lien Tran, Tae-Jong Yoon, Beom-Jin Lee
A new conceptual nanoparticle consisting of a silica-coated iron oxide magnetic core and a fattigation-based biocompatible shell with oleic acid and hydrophilic protein (gelatin). The prepared particle can be a useful theranostics platform material for diagnostic imaging and as a drug delivery system. Oleic acid and gelatin were conjugated on the silica-coated magnetic nanoparticle surface to provide three primary functionalities: 1) enhancing biocompatibility and solubility in aqueous solution and providing the ability to incorporate hydrophobic chemical drugs into the shell for delivery, 2) improving treatment-response magnetic monitoring as a diagnostic agent with low nanotoxicity, and 3) increasing anticancer efficacy owing to the controlled release of the incorporated drug in cells and in an animal model...
June 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28415398/combinatorial-delivery-of-superparamagnetic-iron-oxide-nanoparticles-%C3%AE-fe2o3-and-doxorubicin-using-folate-conjugated-redox-sensitive-multiblock-polymeric-nanocarriers-for-enhancing-the-chemotherapeutic-efficacy-in-cancer-cells
#10
Chetan Nehate, M R Aji Alex, Arun Kumar, Veena Koul
Redox sensitive, folate conjugated multiblock polymeric system of (-PLGA-PEG-PLGA-urethane-ss-) demonstrated self-assembly into stable nanoplatforms. The polymeric nanocarriers were encapsulated with doxorubicin and highly crystalline γFe2O3 superparamagnetic iron oxide nanoparticles (SPIONs), for co-delivery of the same to cancer cells, with average particle size of ~170nm and zeta potential of ~-33mV. Furthermore, the designed formulation was evaluated for protein adsorption, hemo-cytocompatibility and stability...
June 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28414307/metabolic-inhibitors-accentuate-the-anti-tumoral-effect-of-hdac5-inhibition
#11
E Hendrick, P Peixoto, A Blomme, C Polese, N Matheus, J Cimino, A Frère, A Mouithys-Mickalad, D Serteyn, L Bettendorff, B Elmoualij, P De Tullio, G Eppe, F Dequiedt, V Castronovo, D Mottet
The US FDA approval of broad-spectrum histone deacetylase (HDAC) inhibitors has firmly laid the cancer community to explore HDAC inhibition as a therapeutic approach for cancer treatment. Hitting one HDAC member could yield clinical benefit but this required a complete understanding of the functions of the different HDAC members. Here we explored the consequences of specific HDAC5 inhibition in cancer cells. We demonstrated that HDAC5 inhibition induces an iron-dependent reactive oxygen species (ROS) production, ultimately leading to apoptotic cell death as well as mechanisms of mitochondria quality control (mitophagy and mitobiogenesis)...
April 17, 2017: Oncogene
https://www.readbyqxmd.com/read/28412770/anemia-in-chronic-kidney-disease
#12
Meredith A Atkinson, Bradley A Warady
Anemia is common and associated with adverse outcomes in children with chronic kidney disease (CKD). Many factors contribute to declining hemoglobin as CKD progresses, but impaired production of erythropoietin by failing kidneys is a central cause. Hepcidin-mediated iron restriction also contributes to anemia by downregulating both intestinal iron absorption and release of stored iron for erythropoiesis. The core components of anemia management remain erythropoiesis-stimulating agents (ESA) and iron supplementation, but despite these therapies, a substantial number of children remain anemic...
April 15, 2017: Pediatric Nephrology: Journal of the International Pediatric Nephrology Association
https://www.readbyqxmd.com/read/28408882/targeted-nanotechnology-in-glioblastoma-multiforme
#13
REVIEW
Talita Glaser, Inbo Han, Liquan Wu, Xiang Zeng
Gliomas, and in particular glioblastoma multiforme, are aggressive brain tumors characterized by a poor prognosis and high rates of recurrence. Current treatment strategies are based on open surgery, chemotherapy (temozolomide) and radiotherapy. However, none of these treatments, alone or in combination, are considered effective in managing this devastating disease, resulting in a median survival time of less than 15 months. The efficiency of chemotherapy is mainly compromised by the blood-brain barrier (BBB) that selectively inhibits drugs from infiltrating into the tumor mass...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28405775/iron-deficiency-treatment-in-patients-with-heart-failure
#14
Ewa A Jankowska, Marcin Drozd, Piotr Ponikowski
Iron deficiency (ID) is one of the major risk factors for disability and mortality worldwide, and it was identified as a common and ominous comorbidity in patients with heart failure (HF), both with and without anaemia. Based on two clinical trials (FAIR-HF and CONFIRM-HF) and other epidemiological evidence, ID has been recognized as an important therapeutic target in symptomatic patients with HF and LVEF ≤45%.Intravenous iron supplementation has been demonstrated to be safe and effective for iron repletion and related with an improvement in clinical status, exercise capacity, and quality of life...
April 13, 2017: Handbook of Experimental Pharmacology
https://www.readbyqxmd.com/read/28405466/potentially-effective-therapy-of-heavy-menstrual-bleeding-with-an-oestradiol-nomegestrol-acetate-oral-contraceptive-a-pilot-study
#15
Edith Weisberg, Kevin McGeehan, Jane Hangan, Ian S Fraser
BACKGROUND: Heavy menstrual bleeding (HMB) exceeding 80 mL per cycle leads to considerable adverse impact on a woman's iron metabolism, incidence of iron deficiency and anaemia, as well as her functioning in society. The objective of the study is to determine the potential efficacy of a Monophasic oestradiol-17β-nomegestrol acetate (E2/Nomac) combined oral contraceptive pill on measured menstrual blood loss as a pilot study in 12 women with objectively demonstrated HMB (>80 mL per cycle)...
2017: Pilot and Feasibility Studies
https://www.readbyqxmd.com/read/28404671/an-update-on-antimicrobial-resistance-in-clostridium-difficile-resistance-mechanisms-and-antimicrobial-susceptibility-testing
#16
Zhong Peng, Dazhi Jin, Hyeun Bum Kim, Charles W Stratton, Bin Wu, Yi-Wei Tang, Xingmin Sun
Oral antibiotics such as metronidazole, vancomycin and fidaxomicin are therapies of choice for CDI. Several important mechanisms for C. difficile antibiotic resistance have been described; these include the acquisition of antibiotic resistance genes via transfer of mobile genetic elements, selective pressure in vivo resulting in gene mutations, altered expression of redox-active proteins, iron metabolism and DNA repair, as well as biofilm formation. This update summarizes new information published since 2010 on phenotypic and genotypic resistance mechanisms in C...
April 12, 2017: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/28400547/anemia-in-thyroid-diseases
#17
Ewelina Szczepanek-Parulska, Aleksandra Hernik, Marek Ruchała
Anemia is a frequent, although often underestimated, clinical condition accompanying thyroid diseases. In spite of the fact that anemia and thyroid dysfunction often occur simultaneously, the causative relationship between these two disorders remains ambiguous. Thyroid hormones stimulate erythrocytes precursors proliferation directly, as well as via erythropoietin production enhancement, whereas iron-deficient anemia negatively influences thyroid hormonal status. Thus, different forms of anemia might emerge in the course of thyroid dysfunction...
March 28, 2017: Polish Archives of Internal Medicine
https://www.readbyqxmd.com/read/28399703/value-of-speckle-tracking-echocardiography-for-detection-of-clinically-silent-left-ventricular-dysfunction-in-patients-with-%C3%AE-thalassemia
#18
Mozhgan Parsaee, Sedigheh Saedi, Pegah Joghataei, Azita Azarkeivan, Zahra Alizadeh Sani
OBJECTIVE: β-Thalassemia is an inherited hemoglobin disorder resulting in chronic hemolytic anemia requiring chronic transfusion therapy. Cardiac involvement is the main cause of death in patients with thalassemia major. The narrow border is between overt myocardial dysfunction and clinically silent left ventricular (LV) dysfunction in patients with thalassemia. Therefore, we need novel parameters in different imaging techniques to discover cardiac involvement in an early and subtle stage...
April 12, 2017: Hematology (Amsterdam, Netherlands)
https://www.readbyqxmd.com/read/28399459/multiple-hyperthermia-mediated-release-of-trail-spion-nanocomplex-from-thermosensitive-polymeric-hydrogels-for-combination-cancer-therapy
#19
Zhi-Qiang Zhang, Soo-Chang Song
Tumor necrosis factor-related apoptosis-inducing ligand (TRAIL) possesses strong anti-cancer potential because of its ability to specifically kill cancer cells. However, clinical use of TRAIL is impeded by its short in vivo half-life and native TRIAL-resistant cancer cell populations. To overcome these limitations, we designed a multiple magnetic hyperthermia (MHT)-mediated TRAIL release system for combination therapy using an injectable, biodegradable and thermosensitive polymeric hydrogel. In this system, positively charged TRAIL and hydrophobic superparamagnetic iron oxide nanoparticles (SPIONs) are complexed with negatively charged poly(organophosphazene) polymers via ionic and hydrophobic interactions, respectively...
March 30, 2017: Biomaterials
https://www.readbyqxmd.com/read/28399404/data-triumph-at-c
#20
Mark Levine, Pierre-Christian Violet
Despite historical controversy, pharmacologic ascorbate is emerging as promising cancer therapy via pro-oxidant chemistry. In this issue of Cancer Cell, Schoenfeld et al. describe how intracellular iron pools and reactive oxygen species drive pharmacologic ascorbate's selective toxicity to cancer cells in vitro, in mice, and in humans.
April 10, 2017: Cancer Cell
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