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https://www.readbyqxmd.com/read/29346562/scaffold-free-trachea-regeneration-by-tissue-engineering-with-bio-3d-printing
#1
Daisuke Taniguchi, Keitaro Matsumoto, Tomoshi Tsuchiya, Ryusuke Machino, Yosuke Takeoka, Abdelmotagaly Elgalad, Kiyofumi Gunge, Katsunori Takagi, Yasuaki Taura, Go Hatachi, Naoto Matsuo, Naoya Yamasaki, Koichi Nakayama, Takeshi Nagayasu
OBJECTIVES: Currently, most of the artificial airway organs still require scaffolds; however, such scaffolds exhibit several limitations. Alternatively, the use of an autologous artificial trachea without foreign materials and immunosuppressants may solve these issues and constitute a preferred tool. The rationale of this study was to develop a new scaffold-free approach for an artificial trachea using bio-3D printing technology. Here, we assessed the circumferential tracheal replacement using scaffold-free trachea-like grafts generated from isolated cells in an inbred animal model...
January 15, 2018: Interactive Cardiovascular and Thoracic Surgery
https://www.readbyqxmd.com/read/29345917/anisotropic-assembly-of-ag52-and-ag76-nanoclusters
#2
Jia-Wei Liu, Lei Feng, Haifeng Su, Zhi Wang, Quan-Qin Zhao, Xingpo Wang, Chen-Ho Tung, Di Sun, Lan-Sun Zheng
Although there has been an upsurge of interest in anisotropic assembly of inorganic nanoparticles, atomically precise self-assembly of anisotropic (nonspherical) high-nuclearity metal clusters is extremely rare. Herein, we presented two novel silver nanoclusters, Ag52 (SD/Ag23) and Ag76 (SD/Ag24), which are interiorly templated by five MoO42- and a pair of Mo6O228- anions, respectively, and co-protected by bridging RSH and terminal diphosphine ligands exteriorly. Regiospe-cific distribution diphosphine ligands on the surface and the arrangement of multiple molybdate templates within the nanoclusters synergetically tailor their shapes to anisotropic oblate spheroid and elongated rod, respectively, as opposed to isotropic nanospheres...
January 18, 2018: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/29344850/hur-facilitates-cancer-stemness-of-lung-cancer-cells-via-regulating-mir-873-cdk3-and-mir-125a-3p-cdk3-axis
#3
Yu Zhang, Limin Yang, Chunhua Ling, Wei Heng
OBJECTIVES: To study the roles and mechanisms of HuR in cancer stem cell maintenance of lung cancer. RESULTS: HuR expression was increased in tumor spheres of lung cancer cells. Knockdown of HuR suppressed spheroid formation and size, inhibited the expression of stemness-related marker, Oct4, Nanog and ALDH in lung cancer cells. Importantly, HuR and CDK3 expressions were increased in lung cancer tissues compared with normal adjacent tissues, and positively correlated...
January 17, 2018: Biotechnology Letters
https://www.readbyqxmd.com/read/29343829/targeted-inhibitors-of-p-glycoprotein-increase-chemotherapeutic-induced-mortality-of-multidrug-resistant-tumor-cells
#4
Amila K Nanayakkara, Courtney A Follit, Gang Chen, Noelle S Williams, Pia D Vogel, John G Wise
Overexpression of ATP-binding cassette (ABC) transporters is often linked to multidrug resistance (MDR) in cancer chemotherapies. P-glycoprotein (P-gp) is one of the best studied drug transporters associated with MDR. There are currently no approved drugs available for clinical use in cancer chemotherapies to reverse MDR by inhibiting P-glycoprotein. Using computational studies, we previously identified several compounds that inhibit P-gp by targeting its nucleotide binding domain and avoiding its drug binding domains...
January 17, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29343717/the-role-of-nf%C3%AE%C2%BAb-in-spheroid-formation-of-human-breast-cancer-cells-cultured-on-the-random-positioning-machine
#5
Sascha Kopp, Jayashree Sahana, Tawhidul Islam, Asbjørn Graver Petersen, Johann Bauer, Thomas J Corydon, Herbert Schulz, Kathrin Saar, Norbert Huebner, Lasse Slumstrup, Stefan Riwaldt, Markus Wehland, Manfred Infanger, Ronald Luetzenberg, Daniela Grimm
Human MCF-7 breast cancer cells were exposed to a Random Positioning Machine (RPM). After 24 hours (h) the cells grew either adherently within a monolayer (AD) or within multicellular spheroids (MCS). AD and MCS populations were separately harvested, their cellular differences were determined performing qPCR on genes, which were differently expressed in AD and MCS cells. Gene array technology was applied to detect RPM-sensitive genes in MCF-7 cells after 24 h. Furthermore, the capability to form multicellular spheroids in vitro was compared with the intracellular distribution of NF-kappaB (NFκB) p65...
January 17, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29343288/changes-in-the-secretome-of-tri-dimensional-spheroid-cultured-human-mesenchymal-stem-cells-in-vitro-by-interleukin-1-priming
#6
Elena Redondo-Castro, Catriona J Cunningham, Jonjo Miller, Helena Brown, Stuart M Allan, Emmanuel Pinteaux
BACKGROUND: Mesenchymal stem cells (MSCs) are one of the most promising candidates for the treatment of major neurological disorders. Desirable therapeutic properties of MSCs include reparative and regenerative potential but, despite their proven safety, the efficacy of MSCs remains controversial. Therefore, it is essential to optimise culture protocols to enhance the therapeutic potential of the MSC secretome. Here we aimed to: assess the increase in secretion of cytokines that may induce repair, regeneration, or immunomodulation when cultured in three dimensions; study the effect of interleukin (IL)-1 priming on two- (2D) and three-dimensional (3D) cultures of MSC; and evaluate the potential use of the modified secretome using microglial-MSC co-cultures...
January 17, 2018: Stem Cell Research & Therapy
https://www.readbyqxmd.com/read/29341600/combination-of-heparin-binding-peptide-and-heparin-cell-surface-coatings-for-mesenchymal-stem-cell-spheroid-assembly
#7
Jennifer Lei, William L Murphy, Johnna S Temenoff
Microtissues containing multiple cell types have been used in both in vitro models and in vivo tissue repair applications. However, to improve through-put, there is a need to develop a platform that supports self-assembly of a large number of 3D microtissues containing multiple cell types in a dynamic suspension system. Thus, the objective of this study was to exploit the binding interaction between the negatively charged glycosaminoglycan, heparin, and a known heparin binding peptide to establish a method that promotes assembly of mesenchymal stem cell (MSC) spheroids into larger aggregates...
January 17, 2018: Bioconjugate Chemistry
https://www.readbyqxmd.com/read/29339188/the-enhancement-of-siplk1-penetration-across-bbb-and-its-anti-glioblastoma-activity-in-vivo-by-magnet-and-transferrin-co-modified-nanoparticle
#8
Dao-Zhou Liu, Ying Cheng, Rong-Qiao Cai, Wen-Wen Wang, Han Cui, Miao Liu, Bang-le Zhang, Qi-Bing Mei, Si-Yuan Zhou
In order to enhance the penetration of small interference RNA against the polo-like kinase I (siPLK1) across BBB to treat glioblastoma (GBM), transferrin (Tf) modified magnetic nanoparticle (Tf-PEG-PLL/MNP@siPLK1) was prepared. The in vitro experiments indicated that Tf-PEG-PLL/MNP@siPLK1 enhanced the cellular uptake of siPLK1, which resulted in an increase of gene silencing effect and cytotoxicity of Tf-PEG-PLL/MNP@siPLK1 on U87 cells. Besides, Tf-PEG-PLL/MNP@siPLK1 significantly inhibited the growth of U87 glioblastoma spheroids and markedly increased the BBB penetration efficiency of siPLK1 with the application of external magnetic field in in-vitro BBB model...
January 12, 2018: Nanomedicine: Nanotechnology, Biology, and Medicine
https://www.readbyqxmd.com/read/29339187/doxorubicin-loaded-dendritic-fe3o4-supramolecular-nanoparticles-for-magnetic-drug-targeting-and-tumor-regression-in-spheroid-murine-melanoma-model
#9
Saumya Nigam, D Bahadur
This work evaluates the magnetically-guided delivery of DOX-loaded dendritic-Fe3O4 nanoparticles and their tumor regression efficacy in subcutaneous melanoma in C57BL/6 mice. The hematological, biochemical and histopathological parameters were minimally affected. The nanoparticles localized in lungs, liver and spleen suggesting non-specific uptake. However, in tumor-bearing mice, substantially higher localization in magnetically-targeted tumor was observed when compared to passive localization in non-targeted tumor...
January 12, 2018: Nanomedicine: Nanotechnology, Biology, and Medicine
https://www.readbyqxmd.com/read/29337282/comparative-proteome-analysis-of-monolayer-and-spheroid-culture-of-canine-osteosarcoma-cells
#10
Christiane Gebhard, Ingrid Miller, Karin Hummel, Martina Neschi Née Ondrovics, Sarah Schlosser, Ingrid Walter
Osteosarcoma is an aggressive bone tumor with high metastasis rate in the lungs and affects both humans and dogs in a similar way. Three-dimensional tumor cell cultures mimic the in vivo situation of micro-tumors and metastases and are therefore better experimental in vitro models than the often applied two-dimensional monolayer cultures. The aim of the present study was to perform comparative proteomics of standard monolayer cultures of canine osteosarcoma cells (D17) and three-dimensional spheroid cultures, to better characterize the 3D model before starting with experiments like migration assays...
January 11, 2018: Journal of Proteomics
https://www.readbyqxmd.com/read/29334814/dual-ligand-modified-liposomes-provide-effective-local-targeted-delivery-of-lung-cancer-drug-by-antibody-and-tumor-lineage-homing-cell-penetrating-peptide
#11
Congcong Lin, Xue Zhang, Hubiao Chen, Zhaoxiang Bian, Ge Zhang, Muhammad Kashif Riaz, Deependra Tyagi, Ge Lin, Yanbo Zhang, Jinjin Wang, Aiping Lu, Zhijun Yang
The abilities of a drug delivery system to target and penetrate tumor masses are key factors in determining the system's chemotherapeutic efficacy. Here, we explored the utility of an anti-carbonic anhydrase IX (anti-CA IX) antibody and CPP33 dual-ligand modified triptolide-loaded liposomes (dl-TPL-lip) to simultaneously enhance the tumor-specific targeting and increase tumor cell penetration of TPL. In vitro, the dl-TPL-lip increased the cytotoxicity of TPL in CA IX-positive lung cancer cells, which showed tunable size (137...
November 2018: Drug Delivery
https://www.readbyqxmd.com/read/29333657/gelatin-methacryloyl-hydrogels-in-the-absence-of-a-crosslinker-as-3d-glioblastoma-multiforme-gbm-mimetic-microenvironment
#12
Pelin Erkoc, Fidan Seker, Tugba Bagci-Onder, Seda Kizilel
3D platforms are important for monitoring tumor progression and screening drug candidates to eradicate tumors such as glioblastoma multiforme (GBM), a malignant type of human brain tumor. Here, a new strategy is reported that exploits visible-light-induced crosslinking of gelatin where the reaction is carried out in the absence of an additional crosslinker. Visible light-induced crosslinking promotes the design of cancer microenvironment-mimetic system without compromising the cell viability during the process and absence of crosslinker facilitates the synthesis of the unique construct...
January 15, 2018: Macromolecular Bioscience
https://www.readbyqxmd.com/read/29333084/effects-of-%C3%AE-mangostin-on-viability-growth-and-cohesion-of-multicellular-spheroids-derived-from-human-breast-cancer-cell-lines
#13
Giuseppe Scolamiero, Claudia Pazzini, Francesca Bonafè, Carlo Guarnieri, Claudio Muscari
Background: α-Mangostin (αMG) is extracted from Garcinia mangostana Linn and exerts antiproliferative activities. Although several researches on αMG were performed using cell monolayers, the in vitro pharmacological effects on 3D cancer models have never been investigated. Aim of the present study was to find new anticancer properties of αMG by evaluating the changes that this compound provokes in multicellular tumour spheroids (MCTSs). Methods: MCTSs were generated from MDA-MB-231 and MCF-7 breast tumour cell lines and then treated with 0...
2018: International Journal of Medical Sciences
https://www.readbyqxmd.com/read/29332411/%C3%AE-1-integrin-mediated-multicellular-resistance-in-hepatocellular-carcinoma-through-activation-of-the-fak-akt-pathway
#14
Tao Tian, Chun-Li Li, Xiao Fu, Shu-Hong Wang, Jun Lu, Hui Guo, Yu Yao, Ke-Jun Nan, Yu-Juan Yang
Objective To explore the role and mechanism of β1 integrin in the regulation of multicellular drug resistance in hepatocellular carcinoma (HCC). Methods This in vitro study used a liquid overlay technique to obtain multicellular spheroids of two human HCC cell lines, HepG2 and Bel-7402. The morphology of the spheroids was observed by optical and electron microscopy. The effects of exposure to 5-fluorouracil (5-FU) and cisplatin (CDDP) on cell proliferation and the induction of apoptosis were assessed in monolayer cells and multicellular spheroids...
January 1, 2018: Journal of International Medical Research
https://www.readbyqxmd.com/read/29331752/synthesis-of-gold-i-phosphine-complexes-containing-the-2-brc6f4pph2-ligand-evaluation-of-anticancer-activity-in-2d-and-3d-spheroidal-models-of-hela-cancer-cells
#15
T Srinivasa Reddy, Steven H Privér, Nedaossadat Mirzadeh, Suresh K Bhargava
Newly synthesised mononuclear gold complexes containing the 2-BrC6F4PPh2 ligand have been fully characterised and their anticancer activity towards five human tumor [prostate (PC3), glioblastoma (U87MG), cervical (HeLa), fibrosarcoma (HT1080), ovarian (SKOV-3)] and normal human embryonic kidney (Hek-293T) cell lines investigated. Some of the synthesised gold complexes displayed higher cytotoxicity than cisplatin towards PC-3, HeLa and U87MG cells and inhibited the thioredoxin reductase (TrxR) enzyme, which is considered a potential target for new compounds in cancer treatment...
December 24, 2017: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/29331125/diffusion-influenced-reaction-rates-for-active-sphere-prolate-spheroid-pairs-and-janus-dimers
#16
Sergey D Traytak, Denis S Grebenkov
The purpose of this paper is twofold. First, we provide a concise introduction to the generalized method of separation of variables for solving diffusion problems in canonical domains beyond conventional arrays of spheres. Second, as an important example of its application in the theory of diffusion-influenced reactions, we present an exact solution of the axially symmetric problem on diffusive competition in an array of two active particles (including Janus dumbbells) constructed of a prolate spheroid and a sphere...
January 14, 2018: Journal of Chemical Physics
https://www.readbyqxmd.com/read/29330502/targeting-insulin-like-growth-factor-i-and-extracellular-matrix-interactions-in-melanoma-progression
#17
Berline Murekatete, Ali Shokoohmand, Jacqui McGovern, Lipsa Mohanty, Christoph Meinert, Brett G Hollier, Alfred Zippelius, Zee Upton, Abhishek S Kashyap
Insulin-like growth factor (IGF)-I binds to the ECM protein vitronectin (VN) through IGF binding proteins (IGFBPs) to enhance proliferation and migration of skin keratinocytes and fibroblasts. Although evidence exists for the role of individual components of the complex (IGF-I, IGFBP-3 and VN), the cellular functions stimulated by these proteins together as a complex remains un-investigated in melanoma cells. We report here that the IGF-I:IGFBP-3:VN trimeric complex stimulates a dose-dependent increase in the proliferation and migration of WM35 and Sk-MEL28 melanoma cells...
January 12, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29330447/human-placental-derived-adherent-stromal-cells-co-induced-with-tnf-%C3%AE-and-ifn-%C3%AE-inhibit-triple-negative-breast-cancer-in-nude-mouse-xenograft-models
#18
Hoshea Allen, Niva Shraga-Heled, Michal Blumenfeld, Tamar Dego-Ashto, Dana Fuchs-Telem, Ariel Gilert, Zami Aberman, Racheli Ofir
Culturing 3D-expanded human placental-derived adherent stromal cells (ASCs) in the presence of tumor necrosis factor-alpha (TNF-α) and interferon-gamma (IFN-γ) transiently upregulated the secretion of numerous anti-proliferative, anti-angiogenic and pro-inflammatory cytokines. In a 3D-spheroid screening assay, conditioned medium from these induced-ASCs inhibited proliferation of cancer cell lines, including triple-negative breast cancer (TNBC) lines. In vitro co-culture studies of induced-ASCs with MDA-MB-231 human breast carcinoma cells, a model representing TNBC, supports a mechanism involving immunomodulation and angiogenesis inhibition...
January 12, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29330434/targeting-melanoma-stem-cells-with-the-vitamin-e-derivative-%C3%AE-tocotrienol
#19
Monica Marzagalli, Roberta Manuela Moretti, Elio Messi, Marina Montagnani Marelli, Fabrizio Fontana, Alessia Anastasia, Maria Rosa Bani, Giangiacomo Beretta, Patrizia Limonta
The prognosis of metastatic melanoma is very poor, due to the development of drug resistance. Cancer stem cells (CSCs) may play a crucial role in this mechanism, contributing to disease relapse. We first characterized CSCs in melanoma cell lines. We observed that A375 (but not BLM) cells are able to form melanospheres and show CSCs traits: expression of the pluripotency markers SOX2 and KLF4, higher invasiveness and tumor formation capability in vivo with respect to parental adherent cells. We also showed that a subpopulation of autofluorescent cells expressing the ABCG2 stem cell marker is present in the A375 spheroid culture...
January 12, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29330287/targeted-akt-inhibition-in-prostate-cancer-cells-and-spheroids-reduces-aerobic-glycolysis-and-generation-of-hyperpolarized-1-13c-lactate
#20
Sui Seng Tee, Izabela Suster, Steven Truong, Sangmoo Jeong, Roozbeh Eskandari, Valentina Di Gialleonardo, Julio A Alvarez, Hannah N Aldeborgh, Kayvan Keshari
The PI3K/AKT/mTOR (PAM) signaling pathway is frequently mutated in prostate cancer. Specific AKT inhibitors are now in advanced clinical trials and this study investigates the effect of MK2206, a non-ATP competitive inhibitor, on the cellular metabolism in the context of prostate cancer. A significant reduction in cell motility and aerobic glycolysis was observed in prostate cancer cells with treatment. These changes were not accompanied by a reduction in the ratio of high-energy phosphates or a change in total protein levels of enzymes (e...
January 12, 2018: Molecular Cancer Research: MCR
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