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https://www.readbyqxmd.com/read/28723064/doxorubicin-intracellular-remote-release-from-biocompatible-oegma-based-magnetic-nanogels-triggered-by-magnetic-hyperthermia
#1
Esther Cazares-Cortes, Ana Espinosa, Jean-Michel Guigner, Aude Michel, Nébéwia Griffete, Claire Wilhelm, Christine Menager
Hybrid nanogels, composed of thermoresponsive polymers and superparamagnetic nanoparticles (MNPs) are attractive nanocarriers for biomedical applications, being able - as polymer matrix - to uptake and release high quantities of chemotherapeutic agents and - as magnetic nanoparticles - to heat when exposed to an alternative magnetic field (AMF), better known as magnetic hyperthermia. Herein, biocompatible, pH-, magnetic- and thermo-responsive nanogels, based on oligo (ethylene glycol) methacrylate monomers (OEGMAs) and methacrylic acid co-monomer (MAA) were prepared by conventional precipitation radical co-polymerization in water, post-assembled by complexation with iron oxide magnetic nanoparticles (MNPs) of maghemite (-Fe2O3) and loaded with an anticancer drug (doxorubicin - DOX), for remotely controlled drug release by "hot-spot", as an athermal magnetic hyperthermia strategy against cancer...
July 19, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28722424/metabolic-study-of-cancer-cells-using-a-ph-sensitive-hydrogel-nanofiber-light-addressable-potentiometric-sensor
#2
Parmiss Mojir Shaibani, Hashem Etayash, Selvaraj Naicker, Kamaljit Kaur, Thomas Thundat
We report a simple, fast, and cost-effective approach that measures cancer cell metabolism and their response to anticancer drugs in real time. Using a Light Addressable Potentiometric Sensor integrated with pH sensitive hydrogel nanofibers (NF-LAPS), we detect localized changes in pH of the media as cancer cells consume glucose and release lactate. NF-LAPS shows a sensitivity response of 74 mV/pH for cancer cells. Cancer cells (MDA MB231) showed a response of ∼0.4 unit change in pH compared to virtually no change observed for normal cells (MCF10A)...
January 27, 2017: ACS Sensors
https://www.readbyqxmd.com/read/28722352/serpine-1-induces-alveolar-type-ii-cell-senescence-through-activating-p53-p21-rb-pathway-in-fibrotic-lung-disease
#3
Chunsun Jiang, Gang Liu, Tracy Luckhardt, Veena Antony, Yong Zhou, A Brent Carter, Victor J Thannickal, Rui-Ming Liu
Senescence of alveolar type 2 (ATII) cells, progenitors of the alveolar epithelium, is implicated in the pathogeneses of idiopathic pulmonary fibrosis (IPF), an aging-related progressive fatal lung disorder with unknown etiology. The mechanism underlying ATII cell senescence in fibrotic lung diseases, however, remains poorly understood. In this study, we report that ATII cells in IPF lungs express higher levels of serpine 1, also known as plasminogen activator inhibitor 1 (PAI-1), and cell senescence markers p21 and p16, compared to ATII cells in control lungs...
July 19, 2017: Aging Cell
https://www.readbyqxmd.com/read/28722111/monoamine-oxidase-a-is-highly-expressed-in-classical-hodgkin-lymphoma
#4
Pei Chuan Li, Imran N Siddiqi, Anja Mottok, Eric Y Loo, Chieh Hsi Wu, Wendy Cozen, Christian Steidl, Jean Chen Shih
Monoamine oxidase A (MAOA) is a mitochondrial enzyme that catalyzes oxidative deamination of neurotransmitters and dietary amines and produces H2 O2. It facilitates the progression of gliomas and prostate cancer, but its expression and functional relevance have not been studied in lymphoma. Here, we evaluated MAOA in 427 cases of Hodgkin and non-Hodgkin lymphoma and in a spectrum of reactive lymphoid tissues by immunohistochemistry on formalin-fixed paraffin-embedded specimens. MAOA was expressed by Hodgkin Reed-Sternberg (HRS) cells in the majority of classical Hodgkin lymphomas (cHL) (181/241; 75%), with 34...
July 19, 2017: Journal of Pathology
https://www.readbyqxmd.com/read/28722060/poly-amino-acid-polyester-graft-copolymer-nanoparticles-for-the-acid-mediated-release-of-doxorubicin
#5
Daniel J Price, Mthulisi Khuphe, Robert P W Davies, James R McLaughlan, Nicola Ingram, Paul D Thornton
Biodegradable polymers have emerged as highly effective drug delivery vehicles. We combine N-carboxyanhydride and O-carboxyanhydride ring opening polymerisations to synthesise a poly(amino acid)-polyester graft copolymer capable of encapsulating, and subsequently releasing doxorubicin via acid-mediated hydrolysis. Consequently, the nanoparticles detailed are extremely promising vehicles for the controlled delivery of chemotherapeutic agents.
July 19, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/28721806/l-tetrahydropalmatine-induces-apoptosis-in-eu-4-leukemia-cells-by-down-regulating-x-linked-inhibitor-of-apoptosis-protein-and-increases-the-sensitivity-towards-doxorubicin
#6
S Li, D Chen, Renzhi Pei, Y Lu, P Zhang, J Ma, X Liu, X Du, K Sha, L Chen, J Cao, X Zhuang, J Wu, L Li, Z Fan, P Ye, S Tang, B Zhang, X Shi, K Li
BACKGROUND: L-Tetrahydropalmatine (L-THP) is a tetra-hydro protoberberine isoquinoline alkaloid. The phyto-compounds bearing isoquinoline alkaloids have been reported to show a potential effect against a number of human cancers cell lines including leukemia. We hypothesized that L-THP, being an isoquinoline alkaloid, could be a potential molecule against acute lymphoblastic leukemia (ALL), in this study, we evaluate L-THP against p53 deficient leukemia EU-4 cell lines in vitro. METHODS: For the study, p53 null leukemia EU-4 cells were used and treated with L-THP...
July 18, 2017: Current Molecular Medicine
https://www.readbyqxmd.com/read/28720897/a-predictive-mathematical-modeling-approach-for-the-study-of-doxorubicin-treatment-in-triple-negative-breast-cancer
#7
Matthew T McKenna, Jared A Weis, Stephanie L Barnes, Darren R Tyson, Michael I Miga, Vito Quaranta, Thomas E Yankeelov
Doxorubicin forms the basis of chemotherapy regimens for several malignancies, including triple negative breast cancer (TNBC). Here, we present a coupled experimental/modeling approach to establish an in vitro pharmacokinetic/pharmacodynamic model to describe how the concentration and duration of doxorubicin therapy shape subsequent cell population dynamics. This work features a series of longitudinal fluorescence microscopy experiments that characterize (1) doxorubicin uptake dynamics in a panel of TNBC cell lines, and (2) cell population response to doxorubicin over 30 days...
July 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28719857/in-situ-adjuvant-therapy-using-a-responsive-doxorubicin-loaded-fibrous-scaffold-after-tumor-resection
#8
Ziming Yuan, Wei Wu, Zhongwei Zhang, Zhiyong Sun, Ruoyu Cheng, Guoqin Pan, Xuemin Wang, Wenguo Cui
As tumor microenvironment becoming more and more important in tumor study, the acid pH around or in solid tumors drew lots of attentions. And the progress of drug delivery systems made the responsive-release possible. This time, we fabricated a new-type composite electrospun poly (L-lactide) (PLLA) fibrous scaffolds, that blent with the mesoporous silica particles (MSNs). Further more, we used sodium bicarbonate (SB) as acid sensitive agent which was wrapped inside the MSNs. And doxorubicin (DOX) was also wrapped into MSNs in order to achieve a sustained release to inhibit tumors in mice, which mimicked the remnant breast cancer with surgery...
July 1, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28719026/in-vitro-antiproliferative-and-antibacterial-activities-of-essential-oils-from-four-species-of-guatteria
#9
Anderson R Santos, Thalita Gilda S Benghi, Angelita Nepel, Francisco A Marques, Adriana Q Lobão, Marta Cristina T Duarte, Ana Lúcia T G Ruiz, João E Carvalho, Beatriz H L N S Maia
The essential oils extracted from four species of the genus Guatteria, G.australis, G. ferruginea, G. latifolia and G. sellowiana were analyzed. A total of 24, 22, 25 and 19 constituents of the oils from four species, respectively, were identified by GC-MS. These oils showed qualitative and quantitative differences. All the oils contained the oxygenated sesquiterpenes spathulenol (11.04 - 40.29%) and caryophyllene oxide (7.74 - 40.13%) as predominant constituents. Evaluation of antiproliferative activity of the essential oils showed strong selectivity (1...
July 18, 2017: Chemistry & Biodiversity
https://www.readbyqxmd.com/read/28719025/frequency-risk-factors-and-outcomes-of-central-nervous-system-relapse-in-lymphoma-patients-treated-with-dose-adjusted-epoch-plus-rituximab
#10
M K Malecek, A M Petrich, S Rozell, B Chu, S Trifilio, N Galanina, M Maurer, U Farooq, B Link, G S Nowakowski, C Nabhan, A O Ayed
Background Central nervous system (CNS) relapse in non-Hodgkin lymphoma (NHL) is a rare but serious complication that carries a poor prognosis. The use of infusional etoposide, prednisone, vincristine, cyclophosphamide, doxorubicin, and rituximab (EPOCH-R) for frontline treatment of diffuse large B cell lymphoma (DLBCL) is increasing, though little is known about incidence of and risk factors for CNS relapse with this regimen Patients and methods We completed a chart review of patients with NHL who received EPOCH-R as front line therapy...
July 18, 2017: American Journal of Hematology
https://www.readbyqxmd.com/read/28718812/therapeutic-efficacy-of-the-novel-stimuli-sensitive-nano-ferritins-containing-doxorubicin-in-a-head-and-neck-cancer-model
#11
Verena Damiani, Elisabetta Falvo, Giulio Fracasso, Luca Federici, Martina Pitea, Vincenzo De Laurenzi, Gianluca Sala, Pierpaolo Ceci
Doxorubicin is employed alone or in combination for the treatment of several hematological and solid malignancies; despite its efficacy, there are associated cardiotoxicity limits both in its application in patients with heart disease risk factors and also in its long-term use. HFt-MP-PAS40 is a genetically engineered human ferritin heavy chain (HFt)-based construct able to efficiently entrap and deliver doxorubicin to cancer cells. HF-MP-PAS contains a short motif sequence (defined as MP) responsive to proteolytic cleavage by tumor matrix metalloproteases (MMPs), located between each HFt subunit and a masking polypeptide sequence rich in proline (P), alanine (A), and serine (S) residues (PAS)...
July 18, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28718673/ameliorative-effect-of-gallic-acid-in-doxorubicin-induced-hepatotoxicity-in-wistar-rats-through-antioxidant-defense-system
#12
Temidayo Olutayo Omobowale, Ademola Adetokunbo Oyagbemi, Uchechukwu Enwiwe Ajufo, Olumuyima Abiola Adejumobi, Olufunke Eunice Ola-Davies, Adeolu Alex Adedapo, Momoh Audu Yakubu
Hepatotoxicity has been found to be one of the main side effects associated with doxorubicin (Dox) administration in cancer therapy. The aim of the present study was to examine the ameliorative effect of gallic acid (GA) in Dox-induced hepatotoxicity. Sixty male Wistar rats of 10 rats per group were used in this study and were randomly divided into 6 experimental groups (A-F). Rats in Group A served as the control group and received distilled water orally for 7 days; Group B was given Dox at 15 mg/kg body weight intraperitoneally (IP) on Day 8...
July 18, 2017: Journal of Dietary Supplements
https://www.readbyqxmd.com/read/28718636/long-chain-alkyl-esters-of-hydroxycinnamic-acids-as-promising-anticancer-agents-selective-induction-of-apoptosis-in-cancer-cells
#13
José C J M D S Menezes, Najmeh Edraki, Shrivallabh Kamat, Mahsima Khoshneviszadeh, Zahra Kayani, Hossein Hadavand Mirzaei, Ramin Miri, Nasrollah Erfani, Maryam Nejati, José A S Cavaleiro, Tiago B Silva, Luciano Saso, Fernanda M Borges, Omidreza Firuzi
Cancer is the major cause of morbidity and mortality worldwide. Hydroxycinnamic acids (HCAs) are naturally-occurring compounds and their alkyl esters may possess enhanced biological activities. We evaluated C4, C14, C16 and C18 alkyl esters of p-coumaric, ferulic, sinapic and caffeic acids (19 compounds) for their cytotoxic activity against four human cancer cells and also examined their effect on cell cycle alteration and apoptosis induction. The tetradecyl (1c) and hexadecyl (1d) esters of p-coumaric acid and tetradecyl ester of caffeic acid (4c), but not the parental HCAs, were selectively effective against MOLT-4 (human lymphoblastic leukemia) cells with IC50 values of 0...
July 18, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28718370/hook1-inhibits-malignancy-and-epithelial-mesenchymal-transition-in-hepatocellular-carcinoma
#14
Xu Sun, Qi Zhang, Wei Chen, Qida Hu, Yu Lou, Qi-Han Fu, Jing-Ying Zhang, Yi-Wen Chen, Long-Yun Ye, Yi Wang, Shang-Zhi Xie, Li-Qiang Hu, Ting-Bo Liang, Xue-Li Bai
Hook1 is a member of the hook family of coiled-coil proteins, which is recently found to be associated with malignant tumors. However, its biological function in hepatocellular carcinoma is yet unknown. Here, we evaluated the Hook1 levels in human hepatocellular carcinoma samples and matched peritumoral tissues by real-time polymerase chain reaction. Small interfering RNA knockdown and a transforming growth factor-β-induced epithelial-mesenchymal transition model were employed to investigate the biological effects of Hook1 in hepatocellular carcinoma...
July 2017: Tumour Biology: the Journal of the International Society for Oncodevelopmental Biology and Medicine
https://www.readbyqxmd.com/read/28717763/burkitt-s-lymphoma-and-b-cell-lymphoma-unclassifiable-with-features-intermediate-between-diffuse-large-b-cell-lymphoma-and-burkitt-s-lymphoma-in-patients-with-hiv-outcomes-in-a-south-african-public-hospital
#15
Gerhard Sissolak, Matthew Seftel, Thomas S Uldrick, Tonya M Esterhuizen, Nooroudien Mohamed, Danie Kotze
PURPOSE: Burkitt's lymphoma (BL) is a common HIV-associated lymphoma in South Africa. B-cell lymphoma unclassifiable with features intermediate between diffuse large B-cell lymphoma and Burkitt's lymphoma (BL/DLBCL) also occurs in HIV infection. Outcomes of HIV-infected patients with BL or BL/DLBCL in a resource-constrained setting are not defined. METHODS: We performed a retrospective study of HIV-positive patients with BL or BL/DLBCL treated from 2004 to 2012 with curative intent at a publically funded academic medical center in South Africa...
June 2017: Journal of Global Oncology
https://www.readbyqxmd.com/read/28717098/evaluation-of-drug-induced-hematotoxicity-using-novel-in-vitro-monkey-cfu-gm-and-bfu-e-colony-assays
#16
Koichi Goto, Mayumi Goto, Masako Ando-Imaoka, Kiyonori Kai, Kazuhiko Mori
In order to evaluate drug-induced hematotoxicity in monkey cells in vitro, colony-forming unit-granulocyte, macrophage (CFU-GM), and burst-forming unit-erythroid (BFU-E) colony assays were established using mononuclear cells in the bone marrow collected from male cynomolgus monkeys. Furthermore, the effects of doxorubicin, chloramphenicol, and linezolid on CFU-GM and BFU-E colony formation were investigated using established monkey CFU-GM and BFU-E colony assays in comparison with those on human CFU-GM and BFU-E colonies acquired from human umbilical cord blood cells...
2017: Journal of Toxicological Sciences
https://www.readbyqxmd.com/read/28716814/potency-matched-dual-cytokine-antibody-fusion-proteins-for-cancer-therapy
#17
Roberto De Luca, Alex Soltermann, Francesca Pretto, Catherine Pemberton-Ross, Giovanni Pellegrini, Sarah Wulhfard, Dario Neri
A novel biopharmaceutical, consisting of the F8 monoclonal antibody (specific to a splice isoform of fibronectin) simultaneously fused to both tumor necrosis factor and interleukin-2, was found to react with the majority of solid tumors and hematological malignancies in mouse and man, but not with healthy adult tissues. The product selectively localized to neoplastic lesions in vivo, as evidenced by quantitative biodistribution studies using radioiodinated protein preparations. When the potency of the cytokine payloads was matched by a single-point mutation, the resulting fusion protein (IL2-F8-TNF(mut)) eradicated soft-tissue sarcomas in immunocompetent mice, which did not respond to individual antibody-cytokine fusion proteins or by standard doxorubicin treatment...
July 17, 2017: Molecular Cancer Therapeutics
https://www.readbyqxmd.com/read/28716689/brg1-and-smarcal1-transcriptionally-co-regulate-drosha-dgcr8-and-dicer-in-response-to-doxorubicin-induced-dna-damage
#18
Ketki Patne, Radhakrishnan Rakesh, Vijendra Arya, Upasana Bedi Chanana, Ramesh Sethy, Pynskhem Bok Swer, Rohini Muthuswami
Recent investigations have emphasized the role of miRNA biogenesis proteins in the synthesis of non-coding RNA when double-strand DNA breaks are induced by ionizing radiations. However, the role of these ncRNA and their regulation in response to doxorubicin-induced DNA damage is not known. In this paper, BRG1 and SMARCAL1, members of the ATP-dependent chromatin remodelling family, are shown to co-regulate the transcription of DROSHA, DGCR8, and DICER in response to double-strand DNA breaks induced by doxorubicin...
July 14, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28716507/a-novel-topoisomerase-2a-inhibitor-cryptotanshinone-suppresses-the-growth-of-pc3-cells-without-apparent-cytotoxicity
#19
Eun Ju Kim, Sun Young Kim, Sang-Man Kim, Minyoung Lee
DNA topoisomerase 2, which is ubiquitously expressed in eukaryotic cells, is an essential nuclear enzyme that promotes cell survival by regulating DNA topology and chromatid separation. This enzyme has been validated as a target for anticancer agent screening. It can be poisoned by common chemotherapeutics, such as etoposide and doxorubicin, which leads to the accumulation of cytotoxic enzyme-linked DNA double-stranded breaks. However, recent studies have suggested that the topoisomerase 2a isozyme is predominantly responsible for the carcinogenic side effects associated with etoposide and doxorubicin chemotherapy...
July 14, 2017: Toxicology and Applied Pharmacology
https://www.readbyqxmd.com/read/28716129/current-knowledge-on-feline-injection-site-sarcoma-treatment
#20
REVIEW
Katarzyna Zabielska-Koczywąs, Anna Wojtalewicz, Roman Lechowski
Feline injection-site sarcomas (FISS) are malignant skin tumours of mesenchymal origin, the treatment of which is a challenge for veterinary surgeons. The role of surgery, radiotherapy and chemotherapy in FISS treatment has been studied, and a correlation between "clean" surgical margins and disease-free survival has been shown. In addition, clean surgical margins are one of the most important factors for achieving a low recurrence rate. The most effective method of FISS treatment includes combining radical surgery with pre- or postoperative radiotherapy...
July 17, 2017: Acta Veterinaria Scandinavica
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