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Cytotechnology

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https://www.readbyqxmd.com/read/29143227/pdgfr-inhibition-mediated-intracellular-signalling-in-c6-glioma-growth-and-migration-role-of-erk-and-rock-pathway
#1
Juhi Singh, Kedarlal Sharma, Prakash P Pillai
Aberrant PDGFR (Platelet derived growth factor receptor) signalling in brain tumors and gliomas is one of the primary cause of tumor progression. PDGFR stimulation by its ligand and the role of its downstream mediators such as extracellular regulated kinases (ERK1/2), PI3K and ROCK pathways have not been thoroughly investigated. The present study sought to investigate the role of PDGF receptor signalling inhibition on suppression of rat C6 glioma growth and migration. Treatment of C6 cells with PDGFR inhibitor, AG1295 caused a significant reduction in migration and proliferation by regulating the ERK and ROCK signalling...
November 15, 2017: Cytotechnology
https://www.readbyqxmd.com/read/29143226/aligned-ovine-diaphragmatic-myoblasts-overexpressing-human-connexin-43-seeded-on-poly-l-lactic-acid-scaffolds-for-potential-use-in-cardiac-regeneration
#2
Carlos Sebastián Giménez, Paola Locatelli, Florencia Montini Ballarin, Alejandro Orlowski, Ricardo A Dewey, Milagros Pena, Gustavo Abel Abraham, Ernesto Alejandro Aiello, María Del Rosario Bauzá, Luis Cuniberti, Fernanda Daniela Olea, Alberto Crottogini
Diaphragmatic myoblasts (DMs) are precursors of type-1 muscle cells displaying high exhaustion threshold on account that they contract and relax 20 times/min over a lifespan, making them potentially useful in cardiac regeneration strategies. Besides, it has been shown that biomaterials for stem cell delivery improve cell retention and viability in the target organ. In the present study, we aimed at developing a novel approach based on the use of poly (L-lactic acid) (PLLA) scaffolds seeded with DMs overexpressing connexin-43 (cx43), a gap junction protein that promotes inter-cell connectivity...
November 15, 2017: Cytotechnology
https://www.readbyqxmd.com/read/29110119/metformin-synergistically-enhances-antitumor-activity-of-cisplatin-in-gallbladder-cancer-via-the-pi3k-akt-erk-pathway
#3
Tingting Bi, Ao Zhu, Xufeng Yang, Huiying Qiao, Jinmei Tang, Yan Liu, Rong Lv
Metformin (Met) is a widely used antidiabetic drug and has demonstrated interesting anticancer effects in various cancer models, alone or in combination with chemotherapeutic drugs. The aim of the present study is to investigate the synergistic effect of Met with cisplatin (Cis) on the tumor growth inhibition of gallbladder cancer cells (GBC-SD and SGC-996) and explore the underlying mechanism. Cells were treated with Met and/or Cis and subjected to cell viability, colony formation, apoptosis, cell cycle, western blotting, xenograft tumorigenicity assay and immunohistochemistry...
November 6, 2017: Cytotechnology
https://www.readbyqxmd.com/read/29101583/therapeutic-effect-of-28-homobrassinolide-on-leukotriene-synthesis-in-leukemia-cells
#4
Chuan He, Zhigang Liu, Jingcao Huang, Ting Liu
The present study was aimed to investigate the effect of 28-homobrassinolide on leukotriene synthesis in the 2H3 cells. Cell viability was determined by using sulforhodamine B (SRB) assay. Leukotriene C4 (LTC4) and Leukotriene B4 (LTB4) were determined in the cell and cell lysates. Intracellular Ca(2+) was determined in the intact cells. Phospholipases A2 (PLA2) expression was determined in the cells using immunofluorescence. LTC4 and LTB4 were tremendously increased in IgE-loaded 2H3 cells. However, these levels were significantly reduced following treatment with 28-homobrassinolide...
November 3, 2017: Cytotechnology
https://www.readbyqxmd.com/read/29098499/functional-role-of-natural-killer-t-cells-in-non-obese-pre-diabetes-model-mice
#5
Mikako Saito, Misako Kaburagi, Keiko Otokuni, Genu Takahashi
Pre-diabetic patients have a high risk of developing diabetes as well as other associated diseases. From the viewpoint of risk assessment and to assist the development of protective therapies, we focused on the functional role of natural killer T (NKT) cells in pre-diabetes. We found that the expression of an NKT cell marker gene, Va14-Ja18, was significantly lower in specific tissues/organs such as adipose tissue and pancreas in non-obese pre-diabetes model mice than in their normal littermates. Subsequently, in the pre-diabetes model mice, Va14-Ja18 was activated with α-galactosylceramide (α-GalCer) and its effect on glucose tolerance was estimated...
November 2, 2017: Cytotechnology
https://www.readbyqxmd.com/read/29032508/development-and-characterization-of-2-dimensional-culture-for-buffalo-intestinal-cells
#6
Nidhi Chaudhary, Himanshu Agrawal, Mamta Pandey, Suneel Onteru, Dheer Singh
Small intestinal epithelial cells (IEC) play a major role in the absorption of nutrients and toxins. Due to the similarity of genome-wide single copy protein orthologues between cattle and human, establishment of ruminant's primary small IEC culture could be a valuable tool for toxicity studies. Therefore, the current study focused on the development and characterization of buffalo IEC culture, as cattle slaughter is banned in India. The buffalo jejunum fragments were washed consecutively several times in saline, warm phosphate buffered saline (PBS), PBS with 5 mM dithiothreitol, digesting solution and 2% sorbitol in PBS...
October 14, 2017: Cytotechnology
https://www.readbyqxmd.com/read/29032507/a-novel-lab-on-a-chip-platform-for-spheroid-metabolism-monitoring
#7
Frank Alexander, Sebastian Eggert, Joachim Wiest
Sensor-based cellular microphysiometry is a technique that allows non-invasive, label-free, real-time monitoring of living cells that can greatly improve the predictability of toxicology testing by removing the influence of biochemical labels. In this work, the Intelligent Mobile Lab for In Vitro Diagnostics (IMOLA-IVD) was utilized to perform cellular microphysiometry on 3D multicellular spheroids. Using a commercial 3D printer, 3 × 3 microwell arrays were fabricated to maintain nine previously cultured HepG2 spheroids on a single BioChip...
October 14, 2017: Cytotechnology
https://www.readbyqxmd.com/read/28988392/a-guide-for-endometrial-cancer-cell-lines-functional-assays-using-the-measurements-of-electronic-impedance
#8
Joanna Kozak, Paulina Wdowiak, Ryszard Maciejewski, Anna Torres
Endometrial cancer cell lines are critical tools to investigate the molecular mechanism of tumorigenesis using the end point cell-based assay such as proliferation, cytotoxicity, apoptosis, anoikis or migration and invasion. The proper assay optimization and performance is essential for physiologically relevant results interpretation. In this study we use label-free real-time cell analysis platform (xCELLigence) to optimize growing conditions for proliferation and migration experiments of two types of endometrial cancer cell lines HEC-1-B, HEC-1-A, KLE, and Ishikawa...
October 7, 2017: Cytotechnology
https://www.readbyqxmd.com/read/28988362/mir-29b-mimics-promotes-cell-apoptosis-of-smooth-muscle-cells-via-targeting-on-mmp-2
#9
Lingguang Shen, Yanhui Song, Yuqin Fu, Peipei Li
The phenotypic transformation and dysfunctions of vascular smooth muscle cells (SMCs) such as abnormality proliferation and apoptosis are key pathological basis of atherosclerosis. The recent study aimed to detect the role of miR-29b in phenotypic transformation of SMCs. In this study, we investigated the expression level of miR-29b and MMP-2 in acute coronary syndrome (ACS) patients, verified whether MMP-2 is the target gene of miR-29b by luciferase reporter gene system, and explored the role of miR-29b in the viability and apoptosis of SMCs...
October 7, 2017: Cytotechnology
https://www.readbyqxmd.com/read/28983752/cytotoxicity-and-apoptotic-cell-death-induced-by-vitis-vinifera-peel-and-seed-extracts-in-a431-skin-cancer-cells
#10
J Grace Nirmala, S Evangeline Celsia, Akila Swaminathan, R T Narendhirakannan, Suvro Chatterjee
Vitis vinifera. L is one of the most widely consumed fruits in the world and are rich in antioxidant abundant polyphenols. The present study was carried out to assess the antiproliferative and apoptotic effects of Vitis vinifera peel and seed extracts in an in vitro model using human epidermoid carcinoma A431 cell lines. Vitis vinifera peel and seed extracts were incubated with A431 cells to evaluate the antiproliferative, apoptotic effects and the morphological apoptotic changes induced by the extracts. Mitochondrial membrane potential was also measured after incubating the cells with extracts...
October 5, 2017: Cytotechnology
https://www.readbyqxmd.com/read/28983728/17%C3%AE-estradiol-and-progesterone-effect-on-human-papillomavirus-16-positive-cells-grown-as-spheroid-co-cultures
#11
Merja Ruutu, Jaana Rautava, Aaro Turunen, Teemu Tirri, Stina Syrjänen
Human papillomavirus (HPV) is the key epidemiologic factor of cervical cancer, but additional cofactors are mandatory. Estrogen has been considered as one of those. Here, the aim was to study the effects of steroid hormones on HPV16 E6-E7, estradiol receptors ERα and ERβ, and progesterone receptor (PR) in HPV16-positive cervical carcinoma cell lines SiHa and CaSki grown as epithelial and fibroblast spheroid co-cultures. The spheroid co-cultures were exposured to 17β-estradiol or progesterone from day 7 onwards...
October 5, 2017: Cytotechnology
https://www.readbyqxmd.com/read/28980092/applications-of-a-metabolic-network-model-of-mesenchymal-stem-cells-for-controlling-cell-proliferation-and-differentiation
#12
Hamideh Fouladiha, Sayed-Amir Marashi, Mohammad Ali Shokrgozar, Mehdi Farokhi, Amir Atashi
Mesenchymal stem cells (MSCs) can be isolated from several tissues of adults. In addition, MSCs have the potential of differentiation into several cell types. Therefore, MSCs are very useful in stem cell therapy and regenerative medicine. MSCs have also been used as gene or protein carriers. As a result, maintaining MSCs in a desirable metabolic state has been the subject of several studies. Here, we used a genome scale metabolic network model of bone marrow derived MSCs for exploring the metabolism of these cells...
October 4, 2017: Cytotechnology
https://www.readbyqxmd.com/read/28975481/interaction-of-allogeneic-adipose-tissue-derived-stromal-cells-and-unstimulated-immune-cells-in-vitro-the-impact-of-cell-to-cell-contact-and-hypoxia-in-the-local-milieu
#13
Aleksandra N Gornostaeva, Elena R Andreeva, Polina I Bobyleva, Ludmila B Buravkova
Multipotent mesenchymal stem cells (MSCs) are an attractive tool for cell therapy and regenerative medicine. Being applied in vivo, allogeneic MSCs are faced with both activated and unstimulated immune cells. The effects of MSCs on activated immune cells are well described and are mainly suppressive. Less is known about the interaction of MSCs with unstimulated immune cells. We evaluated the contribution of tissue-related O2 level ("physiological" hypoxia-5% O2) and cell-to-cell contact to the interaction between allogeneic adipose tissue-derived MSCs (ASCs) and unstimulated peripheral blood mononuclear cells (PBMCs)...
October 3, 2017: Cytotechnology
https://www.readbyqxmd.com/read/28965292/co-culture-of-jeg-3-bewo-and-syncbewo-cell-lines-with-adrenal-h295r-cell-line-an-alternative-model-for-examining-endocrine-and-metabolic-properties-of-the-fetoplacental-unit
#14
Eliza Drwal, Agnieszka Rak, Ewa Gregoraszczuk
Monocultures of different placental cells are used for many physiological and toxicological studies; however, they are not a true reflection of the interaction between placenta and fetus. To develop the most appropriate model to study endocrine and metabolic properties of fetoplacental unit we used three co-culture models of placental cells nonfusogenic JEG-3, unsyncytialised BeWo (BeWo) and syncytialised BeWo (syncBeWo) cultured with adrenal (H295R) cells. As an end point of endocrine properties we investigated steroids receptors expression and steroid secretion, while as metabolic properties AhR, CYP1A1and COMT expression...
September 30, 2017: Cytotechnology
https://www.readbyqxmd.com/read/28965287/a-high-concentration-of-dmso-activates-caspase-1-by-increasing-the-cell-membrane-permeability-of-potassium
#15
Yang Xiang, Ming-Ming Zhao, Sujiao Sun, Xiao-Long Guo, Qiquan Wang, Sheng-An Li, Wen-Hui Lee, Yun Zhang
Dimethyl sulfoxide (DMSO) is widely used in the laboratory and in clinical situations because it is soluble in both aqueous and organic media and can be used to treat many types of diseases. Thus, it is meaningful to assess the comprehensive and in-depth biological activities of DMSO. Here, we showed that a high concentration of DMSO induced pro-inflammatory cytokine interleukin-1β (IL-1β) secretion from the monocytic cell line THP-1. DMSO-induced IL-1β secretion was dependent on intracellular caspase-1 activation...
September 30, 2017: Cytotechnology
https://www.readbyqxmd.com/read/28965266/periostin-silencing-suppresses-the-aggressive-phenotype-of-thyroid-carcinoma-cells-by-suppressing-the-akt-thyroid-stimulating-hormone-receptor-axis
#16
Min Wang, Chunyi Gui, Shenglong Qiu, Jingdong Tang, Zhihai Peng
Clinical evidence indicates that high periostin expression correlates with aggressive phenotype in thyroid carcinoma. However, the biological roles of periostin in thyroid carcinoma development and progression are still unclear. In this study, we explored the effects of periostin silencing on thyroid carcinoma cell growth, invasion, and tumorigenesis. We also studied the impact of periostin on the activation of phosphoinositide 3-kinase (PI3-K)/Akt signaling, which is involved in the pathogenesis of thyroid carcinoma...
September 30, 2017: Cytotechnology
https://www.readbyqxmd.com/read/28965196/berbamine-suppresses-cell-viability-and-induces-apoptosis-in-colorectal-cancer-via-activating-p53-dependent-apoptotic-signaling-pathway
#17
Heng Zhang, Yunping Jiao, Chunyang Shi, Xiao Song, Ying Chang, Yong Ren, Xiaolin Shi
Berbamine has been shown to exhibit anti-cancer activities in various types of cancers. The effects of berbamine on colorectal colon cancer (CRC) have not been examined, and the present study aimed to investigate the anti-cancer effects of berbamine in CRC and explore its underlying molecular mechanisms. The effect of berbamine on the CRC cells was determined by MTT assay. Flow cytometry was performed to examine the effect of berbamine on cell apoptosis and cell cycle as well as mitochondrial membrane potential in CRC cell lines...
September 30, 2017: Cytotechnology
https://www.readbyqxmd.com/read/28929261/transplantation-of-mesenchymal-stem-cells-modulated-cx43-and-cx45-expression-in-rats-with-myocardial-infarction
#18
Jin-Yi Li, Hong-Hong Ke, Yan He, Li-Na Wen, Wei-Yan Xu, Zhi-Fu Wu, Yan-Mei Zhao, Guo-Qiang Zhong
At present, little is known about the influence of mesenchymal stem cell (MSC) transplantation on connexin43 (Cx43) and connexin45 (Cx45) remodeling in the ischemic heart. In this study, we investigated the effect of MSC transplantation on Cx43 and Cx45 remodeling in the ischemic heart. Wistar rats were subjected to left anterior descending artery ligation to induce myocardial infarction (MI) and then randomly allocated to receive an intramyocardial injection of PBS (MI group) or 5-azacytidine-induced MSCs (MSCs group)...
September 19, 2017: Cytotechnology
https://www.readbyqxmd.com/read/28924965/comparative-studies-of-cellular-viability-levels-on-2d-and-3d-in-vitro-culture-matrices
#19
M Gargotti, U Lopez-Gonzalez, H J Byrne, A Casey
In this study, the cellular viability and function of immortalized human cervical and dermal cells are monitored and compared in conventional 2D and two commercial 3D membranes, Collagen and Geltrex, of varying working concentration and volume. Viability was monitored with the aid of the Alamar Blue assay, cellular morphology was monitored with confocal microscopy, and cell cycle studies and cell death mechanism studies were performed with flow cytometry. The viability studies showed apparent differences between the 2D and 3D culture systems, the differences attributed in part to the physical transition from 2D to 3D environment causing alterations to effective resazurin concentration, uptake and conversion rates, which was dependent on exposure time, but also due to the effect of the membrane itself on cellular function...
September 18, 2017: Cytotechnology
https://www.readbyqxmd.com/read/28918563/development-and-validation-of-immortalized-bovine-mammary-epithelial-cell-line-as-an-in-vitro-model-for-the-study-of-mammary-gland-functions
#20
Ji-Xia Li, Abdelrahman Said, Xiu-Guo Ge, Wenxiu Wang, Yong Zhang, Tianming Jin
This study aimed to develop a bovine mammary epithelial (BME) cell line model, which provides a possibility to determine functional properties of the bovine mammary gland. The primary cell culture was derived from bovine mammary gland tissues and processed enzymatically to obtain cell colonies with epithelial-like morphology. The cultures of BME cells were purified and optimally cultured at 37 °C in DMEM/F12 medium supplemented with 10% fetal bovine serum. The BME cells were identified as epithelial cell line by the evaluating the expression of keratin-18 using immunofluorescence staining...
September 16, 2017: Cytotechnology
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