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https://www.readbyqxmd.com/read/28218831/new-possibilities-for-magnetic-control-of-chemical-and-biochemical-reactions
#1
Anatoly Buchachenko, Ronald G Lawler
Chemistry is controlled by Coulomb energy; magnetic energy is lower by many orders of magnitude and may be confidently ignored in the energy balance of chemical reactions. The situation becomes less clear, however, when reaction rates are considered. In this case, magnetic perturbations of nearly degenerate energy surface crossings may produce observable, and sometimes even dramatic, effects on reactions rates, product yields, and spectroscopic transitions. A case in point that has been studied for nearly five decades is electron spin-selective chemistry via the intermediacy of radical pairs...
February 20, 2017: Accounts of Chemical Research
https://www.readbyqxmd.com/read/28218292/hyperthermia-and-chemotherapy-using-fe-salen-nanoparticles-might-impact-glioblastoma-treatment
#2
Makoto Ohtake, Masanari Umemura, Itaru Sato, Taisuke Akimoto, Kayoko Oda, Akane Nagasako, Jeong-Hwan Kim, Takayuki Fujita, Utako Yokoyama, Tomohiro Nakayama, Yujiro Hoshino, Mai Ishiba, Susumu Tokura, Masakazu Hara, Tomoya Muramoto, Sotoshi Yamada, Takatsugu Masuda, Ichio Aoki, Yasushi Takemura, Hidetoshi Murata, Haruki Eguchi, Nobutaka Kawahara, Yoshihiro Ishikawa
We previously reported that μ-oxo N,N'-bis(salicylidene)ethylenediamine iron [Fe(Salen)], a magnetic organic compound, has direct anti-tumor activity, and generates heat in an alternating magnetic field (AMF). We showed that Fe(Salen) nanoparticles are useful for combined hyperthermia-chemotherapy of tongue cancer. Here, we have examined the effect of Fe(Salen) on human glioblastoma (GB). Fe(Salen) showed in vitro anti-tumor activity towards several human GB cell lines. It inhibited cell proliferation, and its apoptosis-inducing activity was greater than that of clinically used drugs...
February 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28216608/expression-of-iron-related-proteins-differentiate-non-cancerous-and-cancerous-breast-tumors
#3
Sara Pizzamiglio, Maida De Bortoli, Elena Taverna, Michele Signore, Silvia Veneroni, William Chi-Shing Cho, Rosaria Orlandi, Paolo Verderio, Italia Bongarzone
We have previously reported hepcidin and ferritin increases in the plasma of breast cancer patients, but not in patients with benign breast disease. We hypothesized that these differences in systemic iron homeostasis may reflect alterations in different iron-related proteins also play a key biochemical and regulatory role in breast cancer. Thus, here we explored the expression of a bundle of molecules involved in both iron homeostasis and tumorigenesis in tissue samples. Enzyme-linked immunosorbent assay (ELISA) or reverse-phase protein array (RPPA), were used to measure the expression of 20 proteins linked to iron processes in 24 non-cancerous, and 56 cancerous, breast tumors...
February 14, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28213093/enhanced-effect-of-geldanamycin-nanocomposite-against-breast-cancer-cells-growing-in-vitro-and-as-xenograft-with-vanquished-normal-cell-toxicity
#4
Suma Prabhu, Preeta Ananthanarayanan, Kannangar Aziz Sajida, Sharada Rai, Srinivas Mutalik, Satish Rao Bola Sadashiva
Despite enormous advances in remedies developed for breast cancer, an effective therapeutic strategy by targeting malignant cells with the least normal tissue toxicity is yet to be developed. Hsp90 is considered to be an important therapeutic target to inhibit cell proliferation. Geldanamycin (GDM), a potent inhibitor of Hsp90 was withdrawn from clinical trials due to its undesirable hepatotoxicity. We report a superparamagnetic iron oxide (SPION) based polymeric nanocomposite of GDM augmenting anticancer competence with decreased hepatic toxicity...
February 14, 2017: Toxicology and Applied Pharmacology
https://www.readbyqxmd.com/read/28212271/carbon-nanotubes-as-an-effective-opportunity-for-cancer-diagnosis-and-treatment
#5
REVIEW
Alessandro Sanginario, Beatrice Miccoli, Danilo Demarchi
Despite the current progresses of modern medicine, the resistance of malignant tumors to present medical treatments points to the necessity of developing new therapeutic approaches. In recent years, numerous studies have focused their attention on the promising use of nanomaterials, like iron oxide nanowires, zinc oxide or mesoporous silica nanoparticles, for cancer and metastasis treatment with the advantage of operating directly at the bio-molecular scale. Among them, carbon nanotubes emerged as valid candidates not only for drug delivery, but also as a valuable tool in cancer imaging and physical ablation...
February 15, 2017: Biosensors
https://www.readbyqxmd.com/read/28211282/signet-ring-cell-carcinoma-of-the-jejunum-an-uncommon-finding-within-the-reach-of-capsule-endoscopy
#6
José Francisco Juanmartiñena, Marta Montes, Ignacio Fernández-Urién
An 80 year-old female presented with ductal breast carcinoma (stage II) three years ago, complained of asthenia and iron-deficiency anemia. No diagnosis was obtained after conventional endoscopy and iron supplements were indicated. Ten months later visible digestive hemorrhage was presented. Upper and lower endoscopy was repeated but non-diagnosis was obtained. Thus, video capsule endoscopy was indicated identifying a stenotic lesion arising in the mucosa of distal jejunum. Histopathological examination revealed a poorly mucinous differentiated signet-ring cell adenocarcinoma with an intense peri-tumoral lymphoid (Crohn´s-like lymphoid reaction) and lympho-vascular infiltration with no nodal metastases (pT3N0;7ª edition TNM classification)...
February 2017: Revista Española de Enfermedades Digestivas
https://www.readbyqxmd.com/read/28209005/serum-iron-and-haemoglobin-estimation-in-oral-submucous-fibrosis-and-iron-deficiency-anaemia-a-diagnostic-approach
#7
Divya Bhardwaj, Ajit D Dinkar, Sujata K Satoskar, Sapna Raut Desai
INTRODUCTION: Oral Submucous Fibrosis (OSMF) is a premalignant condition with potential malignant behaviour characterized by juxta-epithelial fibrosis of the oral cavity. In the process of collagen synthesis, iron gets utilized, by the hydroxylation of proline and lysine, leading to decreased serum iron levels. The trace element like iron is receiving much attention in the detection of oral cancer and precancerous condition like OSMF as it was found to be significantly altered in these conditions...
December 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28206771/magnetic-particle-imaging-a-novel-in-vivo-imaging-platform-for-cancer-detection
#8
Elaine Y Yu, Mindy Bishop, Bo Zheng, R Matthew Ferguson, Amit P Khandhar, Scott J Kemp, Kannan M Krishnan, Patrick W Goodwill, Steven M Conolly
Cancer remains one of the leading causes of death worldwide. Biomedical imaging plays a crucial role in all phases of cancer management. Physicians often need to choose the ideal diagnostic imaging modality for each clinical presentation based on complex trade-offs between spatial resolution, sensitivity, contrast, access, cost, and safety. Magnetic particle imaging (MPI) is an emerging tracer imaging modality that detects superparamagnetic iron oxide (SPIO) nanoparticle tracer with high image contrast (zero tissue background signal), high sensitivity (200 nM Fe) with linear quantitation and zero signal depth attenuation...
February 16, 2017: Nano Letters
https://www.readbyqxmd.com/read/28205535/phylogenetic-analysis-of-eukaryotic-neet-proteins-uncovers-a-link-between-a-key-gene-duplication-event-and-the-evolution-of-vertebrates
#9
Madhuri A Inupakutika, Soham Sengupta, Rachel Nechushtai, Patricia A Jennings, Jose' N Onuchic, Rajeev K Azad, Pamela Padilla, Ron Mittler
NEET proteins belong to a unique family of iron-sulfur proteins in which the 2Fe-2S cluster is coordinated by a CDGSH domain that is followed by the "NEET" motif. They are involved in the regulation of iron and reactive oxygen metabolism, and have been associated with the progression of diabetes, cancer, aging and neurodegenerative diseases. Despite their important biological functions, the evolution and diversification of eukaryotic NEET proteins are largely unknown. Here we used the three members of the human NEET protein family (CISD1, mitoNEET; CISD2, NAF-1 or Miner 1; and CISD3, Miner2) as our guides to conduct a phylogenetic analysis of eukaryotic NEET proteins and their evolution...
February 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28205448/association-between-red-meat-consumption-and-colon-cancer-a-systematic-review-of-experimental-results
#10
Nancy D Turner, Shannon K Lloyd
A role for red and processed meat in the development of colorectal cancer has been proposed based largely on evidence from observational studies in humans, especially in those populations consuming a westernized diet. Determination of causation specifically by red or processed meat is contingent upon identification of plausible mechanisms that lead to colorectal cancer. We conducted a systematic review of the available evidence to determine the availability of plausible mechanistic data linking red and processed meat consumption to colorectal cancer risk...
January 1, 2017: Experimental Biology and Medicine
https://www.readbyqxmd.com/read/28204974/lipid-peroxidation-dependent-cell-death-regulated-by-gpx4-and-ferroptosis
#11
Hirotaka Imai, Masaki Matsuoka, Takeshi Kumagai, Taro Sakamoto, Tomoko Koumura
Glutathione peroxidase 4 (Phospholipid hydroperoxide glutathione peroxidase, PHGPx) can directly reduce phospholipid hydroperoxide. Depletion of GPx4 induces lipid peroxidation-dependent cell death in embryo, testis, brain, liver, heart, and photoreceptor cells of mice. Administration of vitamin E in tissue specific GPx4 KO mice restored tissue damage in testis, liver, and heart. These results indicate that suppression of phospholipid peroxidation is essential for cell survival in normal tissues in mice. Ferroptosis is an iron-dependent non-apoptotic cell death that can elicited by pharmacological inhibiting the cystine/glutamate antiporter, system Xc(-) (type I) or directly binding and loss of activity of GPx4 (Type II) in cancer cells with high level RAS-RAF-MEK pathway activity or p53 expression, but not in normal cells...
February 16, 2017: Current Topics in Microbiology and Immunology
https://www.readbyqxmd.com/read/28203489/effects-of-anti-repulsive-guidance-molecule-c-rgmc-hemojuvelin-antibody-on-hepcidin-and-iron-in-mouse-liver-and-tumor-xenografts
#12
S V Torti, E Lemler, B K Mueller, A Popp, F M Torti
OBJECTIVE: Hepcidin is a peptide hormone produced by the liver that regulates systemic iron homeostasis. Hepcidin is also synthesized by tumors, where it contributes to tumor growth by increasing the tumoral retention of iron. Targeted reduction of hepcidin may therefore be useful in reducing tumor growth. H5F9-AM8 is an antibody in preclinical development for the anemia of chronic disease that reduces hepcidin synthesis by binding to RGMc, a co-receptor involved in the transcriptional induction of hepcidin by BMP6...
November 2016: Clinical & Experimental Pharmacology
https://www.readbyqxmd.com/read/28200116/microrna-related-genetic-variants-in-iron-regulatory-genes-dietary-iron-intake-micrornas-and-lung-cancer-risk
#13
L Zhang, Y Ye, H Tu, M A Hildebrandt, L Zhao, J V Heymach, J A Roth, X Wu
No abstract text is available yet for this article.
February 13, 2017: Annals of Oncology: Official Journal of the European Society for Medical Oncology
https://www.readbyqxmd.com/read/28198025/haemoglobin-responses-to-transfusion-in-severe-iron-deficiency-anaemia-potential-impact-of-gastrointestinal-disorders
#14
X Bosch, E Montori, M Guerra-García, J Costa-Rodríguez, M H Quintanilla, P E Tolosa-Chapasian, P Moreno, N Guasch, A López-Soto
BACKGROUND AND OBJECTIVES: Red blood cell (RBC) transfusion may be justified in iron deficiency anaemia (IDA) when an increase in oxygen delivery is needed, as sometimes occurs in subjects with haemoglobin <8·0 mg/dL, serious comorbidities or at risk of cardiovascular instability. Earlier investigations showed that some patients with severe IDA requiring transfusion had lower than expected post-transfusion haemoglobin levels with poorer clinical outcomes than other patients. After hypothesizing that haemoglobin responses to transfusion were different and that the underlying gastrointestinal (GI) disorders causing IDA could be a confounder explaining this association, these responses were analysed in a prospective cohort of IDA adults referred for outpatient GI investigation...
February 15, 2017: Vox Sanguinis
https://www.readbyqxmd.com/read/28195673/ultrasound-enhanced-sirna-delivery-using-magnetic-nanoparticle-loaded-chitosan-deoxycholic-acid-nanodroplets
#15
Jeong Yu Lee, Calum Crake, Boon Teo, Dario Carugo, Marie de Saint Victor, Anjali Seth, Eleanor Stride
Small interfering RNA (siRNA) has significant therapeutic potential but its clinical translation has been severely inhibited by a lack of effective delivery strategies. Previous work has demonstrated that perfluorocarbon nanodroplets loaded with magnetic nanoparticles can facilitate the intracellular delivery of a conventional chemotherapeutic drug. The aim of this study is to determine whether a similar agent can provide a means of delivering siRNA, enabling efficient transfection without degradation of the molecule...
February 13, 2017: Advanced Healthcare Materials
https://www.readbyqxmd.com/read/28195138/bioproduction-characterization-anticancer-and-antioxidant-activities-of-extracellular-melanin-pigment-produced-by-newly-isolated-microbial-cell-factories-streptomyces-glaucescens-neae-h
#16
Noura El-Ahmady El-Naggar, Sara M El-Ewasy
In this present study, a newly isolated strain, Streptomyces sp. NEAE-H, capable of producing high amount of black extracellular melanin pigment on peptone-yeast extract iron agar and identified as Streptomyces glaucescens NEAE-H. Plackett-Burman statistical design was conducted for initial screening of 17 independent (assigned) variables for their significances on melanin pigment production by Streptomyces glaucescens NEAE-H. The most significant factors affecting melanin production are incubation period, protease-peptone and ferric ammonium citrate...
February 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28191814/the-pathophysiologic-basis-of-anaemia-in-patients-with-malignant-diseases
#17
Umma A Ibrahim, Aminu A Yusuf, Sagir G Ahmed
Cancer patients frequently present with anaemia that may result from the direct or indirect effects of the tumor or its treatment. Anaemia is an independent adverse prognostic factor that exerts negative influence on quality of life and survival of cancer patients. Anaemia in malignant disorders often arises from an interplay of multiple aetiological and pathophysiologic mechanisms. Understanding these mechanisms will help the oncologist identify and treat specific causes of the anaemia thereby minimizing the use of blood transfusion, which is associated with many adverse effects...
September 2016: Gulf Journal of Oncology
https://www.readbyqxmd.com/read/28191450/remotely-triggered-nano-theranostics-for-cancer-applications
#18
Alexandra Sneider, Derek VanDyke, Shailee Paliwal, Prakash Rai
Nanotechnology has enabled the development of smart theranostic platforms that can concurrently diagnose disease, start primary treatment, monitor response, and, if required, initiate secondary treatments. Recent in vivo experiments demonstrate the promise of using theranostics in the clinic. In this paper, we review the use of remotely triggered theranostic nanoparticles for cancer applications, focusing heavily on advances in the past five years. Remote triggering mechanisms covered include photodynamic, photothermal, phototriggered chemotherapeutic release, ultrasound, electro-thermal, magneto-thermal, X-ray, and radiofrequency therapies...
2017: Nanotheranostics (Syd)
https://www.readbyqxmd.com/read/28189044/preparation-and-evaluation-of-aptes-peg-coated-iron-oxide-nanoparticles-conjugated-to-rhenium-188-labeled-rituximab
#19
Bakhtiar Azadbakht, Hossein Afarideh, Mohammad Ghannadi-Maragheh, Ali Bahrami-Samani, Mehdi Asgari
Radioimmuno-conjugated (Rhenium-188 labeled Rituximab), 3-aminopropyltriethoxysilane (APTES)-polyethylene glycol (PEG) coated iron oxide nanoparticles were synthesized and then characterized. Therapeutic effect and targeting efficacy of complex were evaluated in CD20 express B cell lines and tumor bearing Balb/c mice respectively. To reach these purposes, superparamagnetic iron oxide nanoparticles (SPIONs) were synthesized using coprecipitation method and then their surface was treated with APTES for increasing retention time of SPIONs in blood circulation and amine group creation...
May 6, 2016: Nuclear Medicine and Biology
https://www.readbyqxmd.com/read/28185478/multifunctional-magnetic-co-delivery-system-coated-with-polymer-mpeg-pll-fa-for-nasopharyngeal-cancer-targeted-therapy-and-mr-imaging
#20
Hailiang Li, Chaoping Fu, Xiangwan Miao, Quanming Li, Juan Zhang, Huikang Yang, Tao Liu, Xi Chen, Minqiang Xie
The gene and drug co-delivery system has become one of the primary strategies to overcome cancers. Here, we designed a multifunctional magnetic co-delivery system for nasopharyngeal carcinoma-targeted therapy and MR imaging. Aldehyde sodium alginate (ASA) was used to decorate the oxide iron and load cisplain through coordinate bond to form a core complex. The polymer shell poly(l-lysine)-methoxy-polyethylene glycol-folate was used to coat the core complex through electric interaction to give this nano-medicine a target ability...
January 1, 2017: Journal of Biomaterials Applications
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