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cancer cell culture

Christine Wang, Xinming Tong, Xinyi Jiang, Fan Yang
Glioblastoma (GBM) is the most common and aggressive form of primary brain tumor with median survival of 12 months. To improve clinical outcomes, it is critical to develop in vitro models that support GBM proliferation and invasion for deciphering tumor progression and screening drug candidates. A key hallmark of GBM cells is their extreme invasiveness, a process mediated by matrix metalloproteinase (MMP)-mediated degradation of the extracellular matrix. We recently reported the development of a MMP-degradable, poly(ethylene-glycol)-based hydrogel platform for culturing GBM cells...
October 22, 2016: Journal of Biomedical Materials Research. Part A
Lauren E Marshall, Roy Koomullil, Andra R Frost, Joel L Berry
A preclinical testing model for cancer therapeutics that replicates in vivo physiology is needed to accurately describe drug delivery and efficacy prior to clinical trials. To develop an in vitro model of breast cancer that mimics in vivo drug/nutrient delivery as well as physiological size and bio-composition, it is essential to describe the mass transport quantitatively. The objective of the present study was to develop in vitro and computational models to measure mass transport from a perfusion system into a 3D extracellular matrix (ECM)...
October 21, 2016: Annals of Biomedical Engineering
Hung-Yi Liu, Tanja Greene, Tsai-Yu Lin, Camron S Dawes, Murray Korc, Chien-Chi Lin
: The complex network of biochemical and biophysical cues in the pancreatic desmoplasia not only presents challenges to the fundamental understanding of tumor progression, but also hinders the development of therapeutic strategies against pancreatic cancer. Residing in the desmoplasia, pancreatic stellate cells (PSCs) are the major stromal cells affecting the growth and metastasis of pancreatic cancer cells by means of paracrine effects and extracellular matrix protein deposition. PSCs remain in a quiescent/dormant state until they are 'activated' by various environmental cues...
October 18, 2016: Acta Biomaterialia
Raghavendra Gowda, Arati Sharma, Gavin P Robertson
Melanoma is a highly drug resistant cancer. To circumvent this problem, a class of synergistically acting drug combinations, which inhibit multiple key pathways in melanoma cells, could be used as one approach for long-term treatment of this deadly disease. A screen has been undertaken on cell lines to identify those that could be combined to synergistically kill melanoma cells. Plumbagin and Celecoxib are two agents that were identified to synergistically kill melanoma cells by inhibiting the COX-2 and STAT3 pathways, which are constitutively activated in up to 70% of melanomas...
October 18, 2016: Cancer Letters
Hongfang Zhang, Conghua Xie, Jing Yue, Zhenzhen Jiang, Rongjing Zhou, Ruifei Xie, Yan Wang, Shixiu Wu
Previous studies on the mechanisms underlying ESCC (esophageal squamous cell carcinoma) chemoresistance only focused on tumor cells while tumor microenvironment has been completely ignored. Our study aimed to clarify the effect of CAFs (cancer-associated fibroblasts), one major component of tumor microenvironment, on the chemoresistance of ESCC. By primary culture, two pairs of CAFs and matched NFs (normal fibroblasts) were isolated from tumor tissues of ESCC patients and matched normal esophageal epithelial tissues, respectively...
October 21, 2016: Molecular Carcinogenesis
Erika Heninger, Timothy E G Krueger, Stephanie M Thiede, Jamie M Sperger, Brianna L Byers, Madison R Kircher, David Kosoff, Bing Yang, David F Jarrard, Douglas G McNeel, Joshua M Lang
Immune tolerance to self-antigens can limit robust anti-tumor immune responses in the use of tumor vaccines. Expression of novel tumor associated antigens can improve immune recognition and lysis of tumor cells. The cancer-testis antigen (CTA) family of proteins has been hypothesized to be an ideal class of antigens due to tumor-restricted expression, a subset of which have been found to induce antibody responses in patients with prostate disease. We demonstrate that CTA expression is highly inducible in five different Prostate Cancer (PC) cell lines using a hypomethylating agent 5-Aza-2'-deoxycytidine (5AZA) and/or a histone deacetylase inhibitor LBH589...
October 17, 2016: Oncotarget
Sarah Fernandes Teixeira, Ricardo Alexandre de Azevedo, Arthur Carvalho Silva, Rodolpho Campos Braga, Salomão Dória Jorge, José Alexandre Marzagão Barbuto, Carolina Horta Andrade, Adilson Kleber Ferreira
Even with all improvements in both diagnostic and therapeutic techniques, lung cancer remains as the most lethal and prevalent cancer in the world. Therefore, new therapeutic drugs and new strategies of drug combination are necessary to provide treatments that are more efficient. Currently, standard therapy regimen for lung cancer includes platinum drugs, such as cisplatin, oxaliplatin, and carboplatin. Besides of the better toxicity profile of oxaliplatin when compared with cisplatin, peripheral neuropathy remains as a limitation of oxaliplatin dose...
October 18, 2016: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
Ruifeng Liu, Xueping Yu, Anders Wallqvist
Chemical toxicity is conventionally evaluated in animal models. However, animal models are resource intensive; moreover, they face ethical and scientific challenges because the outcomes obtained by animal testing may not correlate with human responses. To develop an alternative method for assessing chemical toxicity, we investigated the feasibility of using chemical-induced genome-wide expression changes in cultured human cells to predict the potential of a chemical to cause specific organ injuries in humans...
October 21, 2016: Chemical Research in Toxicology
Gaia Palmini, Roberto Zonefrati, Carmelo Mavilia, Alessandra Aldinucci, Ettore Luzi, Francesca Marini, Alessandro Franchi, Rodolfo Capanna, Annalisa Tanini, Maria Luisa Brandi
The current improvements in therapy against osteosarcoma (OS) have prolonged the lives of cancer patients, but the survival rate of five years remains poor when metastasis has occurred. The Cancer Stem Cell (CSC) theory holds that there is a subset of tumor cells within the tumor that have stem-like characteristics, including the capacity to maintain the tumor and to resist multidrug chemotherapy. Therefore, a better understanding of OS biology and pathogenesis is needed in order to advance the development of targeted therapies to eradicate this particular subset and to reduce morbidity and mortality among patients...
October 14, 2016: Journal of Visualized Experiments: JoVE
Christophe Beclin, Philipp Follert, Elke Stappers, Serena Barral, Coré Nathalie, Antoine de Chevigny, Virginie Magnone, Kévin Lebrigand, Ute Bissels, Danny Huylebroeck, Andreas Bosio, Pascal Barbry, Eve Seuntjens, Harold Cremer
During neurogenesis, generation, migration and integration of the correct numbers of each neuron sub-type depends on complex molecular interactions in space and time. MicroRNAs represent a key control level allowing the flexibility and stability needed for this process. Insight into the role of this regulatory pathway in the brain is still limited. We performed a sequential experimental approach using postnatal olfactory bulb neurogenesis in mice, starting from global expression analyses to the investigation of functional interactions between defined microRNAs and their targets...
October 21, 2016: Scientific Reports
Xuan Zhou, Wei Zhu, Margaret Nowicki, Shida Miao, Haitao Cui, Benjamin Holmes, Robert I Glazer, Lijie Grace Zhang
Metastasis is one of the deadliest consequences of breast cancer, with bone being one of the primary sites of occurrence. Insufficient 3D biomimetic models currently exist to replicate this process in vitro. In this study, we developed a biomimetic bone matrix using 3D bioprinting technology to investigate the interaction between breast cancer (BrCa) cells and bone stromal cells (fetal osteoblasts and human bone marrow mesenchymal stem cells (MSCs)). A tabletop stereolithography 3D bioprinter was employed to fabricate a series of bone matrices consisting of osteoblasts/MSCs encapsulated in gelatin methacrylate (GelMA) hydrogel with nanocrystalline hydroxyapatite (nHA)...
October 21, 2016: ACS Applied Materials & Interfaces
Mikkel Staberg, Signe Regner Michaelsen, Rikke Darling Rasmussen, Mette Villingshøj, Hans Skovgaard Poulsen, Petra Hamerlik
PURPOSE: Glioblastoma (GBM) ranks among the deadliest solid cancers worldwide and its prognosis has remained dismal, despite the use of aggressive chemo-irradiation treatment regimens. Limited drug delivery into the brain parenchyma and frequent resistance to currently available therapies are problems that call for a prompt development of novel therapeutic strategies. While only displaying modest efficacies as mono-therapy in pre-clinical settings, histone deacetylase inhibitors (HDACi) have shown promising sensitizing effects to a number of cytotoxic agents...
October 20, 2016: Cellular Oncology (Dordrecht)
Sara Zahedi, Karim Shamsasenjan, Aliakbar Movassaghpour, Parvin Akbarzadehlaleh
Purpose: Mesenchymal Stem Cells (MSCs) are one of the essential members of Bone Marrow (BM) microenvironment and the cells affect normal and malignant cells in BM milieu. One of the most important hematological malignancies is Multiple Myeloma (MM). Numerous studies reported various effects of MSCs on myeloma cells. MSCs initiate various signaling pathways in myeloma cells, particularly NF-kβ. NF-kβ signaling pathway plays pivotal role in the survival, proliferation and resistance of myeloma cells to the anticancer drugs, therefore this pathway can be said to be a vital target for cancer therapy...
September 2016: Advanced Pharmaceutical Bulletin
Jing Chen, Xiaoyan Zhang, Han Zhang, Tongqiang Liu, Hui Zhang, Jie Teng, Jun Ji, Xiaoqiang Ding
Chronic kidney disease (CKD) is a state of Klotho deficiency. The Klotho expression may be suppressed due to DNA hypermethylation in cancer cells so we have investigated the effects and possible mechanisms by which Klotho expression is regulated in human aortic smooth muscle cells (HASMCs). The vascular Klotho hypermethylation in radial arteries of patients with end-stage renal disease was described. Cultured HASMCs and 5/6-nephrectomized Sprague Dawley (SD) rats treated with indoxyl sulfate (IS) were used as in vitro and in vivo models, respectively...
2016: International Journal of Biological Sciences
Francesca Salamanna, Veronica Borsari, Silvia Brogini, Gianluca Giavaresi, Annapaola Parrilli, Simona Cepollaro, Matteo Cadossi, Lucia Martini, Antonio Mazzotti, Milena Fini
One of the main limitations, when studying cancer-bone metastasis, is the complex nature of the native bone environment and the lack of reliable, simple, inexpensive models that closely mimic the biological processes occurring in patients and allowing the correct translation of results. To enhance the understanding of the mechanisms underlying human bone metastases and in order to find new therapies, we developed an in vitro three-dimensional (3D) cancer-bone metastasis model by culturing human breast or prostate cancer cells with human bone tissue isolated from female and male patients, respectively...
October 19, 2016: Oncotarget
Gina Lee, Brenda Auffinger, Donna Guo, Tanwir Hasan, Marc Deheeger, Alex L Tobias, Jeong Yeon Kim, Fatemeh Atashi, Lingjiao Zhang, Maciej S Lesniak, James C David, Atique U Ahmed
Increasing evidence exposes a subpopulation of cancer cells, known as cancer stem cells (CSCs), to be critical for the progression of several human malignancies, including glioblastoma multiforme (GBM). CSCs are highly tumorigenic, capable of self-renewal, and resistant to conventional therapies, and thus considered to be one of the key contributors to disease recurrence. In order to elucidate the poorly understood evolutionary path of tumor recurrence and the role of CSCs in this process, we developed patient-derived xenograft GBM recurrent models induced by anti-glioma chemotherapy, temozolomide (TMZ)...
October 7, 2016: Molecular Cancer Therapeutics
Lili Zhang, Marianne Gallup, Lorna Zlock, Yu Ting Feeling Chen, Walter E Finkbeiner, Nancy A McNamara
Lung cancer is the leading cause of cancer-related death, and 87% of these deaths are directly attributable to smoking. Using three-dimensional cultures of primary human bronchial epithelial cells, we demonstrated that loss of adherens junction protein, epithelial cadherin, and the aberrant interaction of its adherens junction binding partner, p120-catenin (p120ctn), with the cytoplasmic tail of apical mucin-1 (MUC1-CT) represent initiating steps in the epithelial-to-mesenchymal transition. Smoke provoked the rapid nuclear entry of p120ctn in complex with MUC1-CT that was inhibited using the MUC1-CT inhibitory peptides, PMIP and GO-201...
October 17, 2016: American Journal of Pathology
Risha L Moskalewicz, Leidy L Isenalumhe, Cindy Luu, Choo Phei Wee, Alan L Nager
OBJECTIVE: To examine clinical characteristics associated with bacteremia in febrile nonneutropenic pediatric oncology patients with central venous catheters (CVCs) in the emergency department (ED). BACKGROUND: Fever is the primary reason pediatric oncology patients present to the ED. The literature states that 0.9% to 39% of febrile nonneutropenic oncology patients are bacteremic, yet few studies have investigated infectious risk factors in this population. METHODS: This was a retrospective cohort study in a pediatric ED, reviewing medical records from 2002 to 2014...
September 17, 2016: American Journal of Emergency Medicine
Jun Li, Jie Ao, Kai Li, Jie Zhang, Yanyan Li, Le Zhang, Yuyan Wei, Di Gong, Junping Gao, Weiwei Tan, Lugang Huang, Lunxu Liu, Ping Lin, Yuquan Wei
Multidrug resistance (MDR) is one of the most important contributors to the high mortality of cancer and remains a major concern. We previously found that zinc finger protein 32 (ZNF32), an important transcription factor associated with cancer in Homo sapiens, protects tumor cells against cell death induced by oxidative stress and other stimuli. We thus hypothesized that ZNF32 might enable the tolerance of cancer cells to anti-tumor drugs because higher ZNF32 expression has been found in cancer tissues and in drug-resistant lung adenocarcinoma (AC) cells...
October 20, 2016: Cell Death & Disease
Shengli Mi, Zhichang Du, Yuanyuan Xu, Zhengjie Wu, Xiang Qian, Min Zhang, Wei Sun
Tumour metastasis is an important reason for cancer death, and cancer cell migration is an important step in the process of tumour metastasis. Studying cancer cell migration is of great significance. Here, we present a novel microfluidic co-culture system and establish mild, moderate and severe cancer models by using HMEpiC and MDA-MB-231 cells to study cancer cell migration and anti-cancer drug screening. Using this device, we achieved high cell viability (over 90%) and a stable analysis of the migration ability of cancer cells...
October 20, 2016: Scientific Reports
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