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Cytotechnology

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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
#1
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
https://www.readbyqxmd.com/read/28900743/catechin-ameliorates-doxorubicin-induced-neuronal-cytotoxicity-in-in-vitro-and-episodic-memory-deficit-in-in-vivo-in-wistar-rats
#2
Sri Pragnya Cheruku, Grandhi Venkata Ramalingayya, Mallikarjuna Rao Chamallamudi, Subhankar Biswas, Krishnadas Nandakumar, Madhavan Nampoothiri, Karthik Gourishetti, Nitesh Kumar
Cognitive dysfunction by chemotherapy compromises the quality of life in cancer patients. Tea polyphenols are known chemopreventive agents. The present study was designed to evaluate the neuroprotective potential of (+) catechin hydrate (catechin), a tea polyphenol, in IMR-32 neuroblastoma cells in vitro and alleviation of episodic memory deficit in Wistar rats in vivo against a widely used chemotherapeutic agent, Doxorubicin (DOX). In vitro, neuroprotective studies were assessed in undifferentiated IMR-32 cells using percentage viability and in differentiated cells by neurite length...
September 13, 2017: Cytotechnology
https://www.readbyqxmd.com/read/28895006/bergenin-increases-osteogenic-differentiation-and-prevents-methylglyoxal-induced-cytotoxicity-in-mc3t3-e1-osteoblasts
#3
Kwang Sik Suh, Suk Chon, Eun Mi Choi
Bergenin, an active component of plants in the genus Bergenia, has multiple biological activities, including anti-inflammatory and immunomodulatory properties. We investigated the effects of bergenin on MC3T3-E1 osteoblasts. Bergenin treatment significantly elevated collagen synthesis, alkaline phosphatase activity, osteocalcin synthesis, and mineralization in the cells (p < 0.05). Additionally, bergenin increased the ratio of osteoprotegerin to receptor activator of nuclear factor kappa-B ligand, and cyclophilin B release...
September 11, 2017: Cytotechnology
https://www.readbyqxmd.com/read/28887606/mir-221-222-promote-chemoresistance-to-cisplatin-in-ovarian-cancer-cells-by-targeting-pten-pi3k-akt-signaling-pathway
#4
Zeinab Amini-Farsani, Mohammad Hossein Sangtarash, Mehdi Shamsara, Hossein Teimori
Cisplatin resistance is one of the main limitations in the treatment of ovarian cancer, and its mechanism has not been fully understood. The objectives of this study were to determine the role of miR-221/222 and its underlying mechanism in chemoresistance of ovarian cancer. We demonstrated that miR-221/222 expression levels were higher in A2780/CP cells compared with A2780 S cells. An in vitro cell viability assay showed that downregulation of miR-221/222 sensitized A2780/CP cells to cisplatin-induced cytotoxicity...
September 8, 2017: Cytotechnology
https://www.readbyqxmd.com/read/28884364/a-new-chemical-complex-can-rapidly-concentrate-lentivirus-and-significantly-enhance-gene-transduction
#5
Jing-Yu Lee, Hu-Hui Lee
In this study, we developed a new purification method using chondroitin sulfate C (CSC) and protamine sulfate (PS) to concentrate lentivirus. To evaluate the efficiency of this new method, we compared it with several previously described purification protocols, including virus concentrated by ultracentrifugation (Ultra), precipitated by polyethylene glycol (PEG), and sedimented by CSC combined with polybrene (PB). After using the different methods to purify and concentrate equivalent amounts of lentivirus supernatant, the virus pellets precipitated by the different methods were resuspended using the equivalent volumes of DMEM...
September 7, 2017: Cytotechnology
https://www.readbyqxmd.com/read/28879517/glioma-targeting-peptide-in-combination-with-the-p53-c-terminus-inhibits-glioma-cell-proliferation-in-vitro
#6
Dan Wang, Meihua Guo, Jiawen Yu, Xinying Wang, Qian Zhang, Xu Yang, Jiaqi Li, Chunhui Zhao, Bin Feng
Glioma is a prevalent malignant primary brain tumor in adults, the treatment for which remains a challenge due to its high infiltration and recurrence. Hence, treatments that lead to the suppression of glioma cell migration and invasion may be used in addition to surgery to increase the therapeutic outcome. In this study, we aimed to construct a multifunctional protein that would exert an effect on glioma cell proliferation and migration. The protein is named GL1-P53C-11R and it consists of the glioma-targeting peptide GL1 (G), the P53 C terminus (Pc) and the cell-penetrating peptide arginine (R)...
September 6, 2017: Cytotechnology
https://www.readbyqxmd.com/read/28866844/generation-and-characterization-of-transgenic-mouse-mesenchymal-stem-cell-lines-expressing-higf-1-or-hg-csf
#7
Gabrielle V M Gonçalves, Daniela N Silva, Rejane H Carvalho, Bruno S F Souza, Kátia Nunes da Silva, Juliana F Vasconcelos, Bruno D Paredes, Carolina K V Nonaka, Ricardo Ribeiro-Dos-Santos, Milena B P Soares
Mesenchymal stem cells (MSC) are promising tools in the fields of cell therapy and regenerative medicine. In addition to their differentiation potential, MSC have the ability to secrete bioactive molecules that stimulate tissue regeneration. Thus, the overexpression of cytokines and growth factors may enhance the therapeutic effects of MSC. Here we generated and characterized mouse bone marrow MSC lines overexpressing hG-CSF or hIGF-1. MSC lines overexpressing hG-CSF or hIGF-1 were generated through lentiviral vector mediated gene transfer...
September 2, 2017: Cytotechnology
https://www.readbyqxmd.com/read/28856530/sufentanil-protects-the-rat-myocardium-against-ischemia-reperfusion-injury-via-activation-of-the-erk1-2-pathway
#8
Hui Tao, Min Nuo, Su Min
Sufentanil, a lipophilic opioid, is the most frequently used clinical drug for ischemic heart disease. The effects of sufentanil on MAPK signaling in ischemic heart disease were explored. The effects of sufentanil on ischemia-reperfusion (IR)-induced myocardial injury in a rat model were examined. The serum levels of CK, LDH, MDA and SOD, and the activities of Na(+)-K(+)-ATPase and Ca(2+)-Mg(2+)-ATPase were measured. The levels of total and phosphorylated ERK1/2, JNK, and p38 were measured by western blotting in the heart, and the myocardial H9C2 cell line was studied...
August 30, 2017: Cytotechnology
https://www.readbyqxmd.com/read/28852902/a-new-method-to-evaluate-anti-allergic-effect-of-food-component-by-measuring-leukotriene-b4-from-a-mouse-mast-cell-line
#9
Mikako Takasugi, Emi Muta, Koji Yamada, Hirofumi Arai
Leukotrienes (LTs), chemical mediators produced by mast cells, play an important role in allergic symptoms such as food allergies and hay fever. We tried to construct an evaluation method for the anti-LTB4 activity of chemical substances using a mast cell line, PB-3c. PB-3c pre-cultured with or without arachidonic acid (AA) was stimulated by calcium ionophore (A23187) for 20 min, and LTB4 production by the cells was determined by HPLC with UV detection. LTB4 was not detected when PB-3c was pre-cultured without AA...
August 29, 2017: Cytotechnology
https://www.readbyqxmd.com/read/28852895/basolateral-pressure-challenges-mammary-epithelial-cell-monolayer-integrity-in-vitro
#10
Katharina S Mießler, Constanze Vitzthum, Alexander G Markov, Salah Amasheh
Mammary gland epithelium is physiologically exposed to variations of hydrostatic pressure due to accumulation of milk and removal by suckling and mechanical milking. Integrity of the mammary gland epithelium primarily relies on the tight junction. To analyze pressure-induced effects on the tight junction, we established a modified Ussing chamber and tested the hypothesis if hydrostatic pressure on the basal side of the epithelium is able to affect barrier properties in a mammary epithelial cell model, in vitro...
August 29, 2017: Cytotechnology
https://www.readbyqxmd.com/read/28799096/a-quantitative-and-qualitative-rna-expression-profiling-assay-for-cell-culture-with-single-cell-resolution
#11
Petra Kraus, Rachel Yerden, Darren Sipes, Shantanu Sur, Thomas Lufkin
Cells are often characterized by their gene expression profile. However, commonly used methods to detect mRNA require cell pooling and could therefore mask differences in gene expression within heterogeneous cell populations. q(2)PISH allows for the analysis of both qualitative and quantitative (q(2)) gene expression on cultured cells for quality control measures with single cell resolution. q(2)PISH was optimized for the subsequent use of two alkaline phosphatase substrates in combination with a cell nucleus count to allow for accurate quantification of gene expression per cell and simultaneously qualitative assessment of potential culture population drift or heterogeneity...
August 10, 2017: Cytotechnology
https://www.readbyqxmd.com/read/28780625/markers-associated-with-neuron-specific-ube3a-imprinting-during-neuronal-differentiation-of-mouse-embryonic-stem-cells
#12
Masamitsu Eitoku, Hidemasa Kato, Narufumi Suganuma, Hidenori Kiyosawa
Understanding gene expression in the brain requires allele-specific transcriptome analysis because of the presence of neuron-specific imprinted genes, which are expressed in a neuron-specific and parent-of-origin-specific manner. Ube3a is a neuron-specific imprinted gene with an expression pattern that changes from biallelic to maternal only (Ube3a imprinting) during differentiation. Because Ube3a imprinting occurs only in neurons, it has the potential to be a marker to assess the quality of neurons produced by in vitro neuronal differentiation of embryonic stem cells (ESCs)...
August 5, 2017: Cytotechnology
https://www.readbyqxmd.com/read/28779292/the-use-of-an-artificial-neural-network-to-model-the-infection-strategy-for-baculovirus-production-in-suspended-insect-cell-cultures
#13
Antonio Contreras-Gómez, Alba Beas-Catena, Asterio Sánchez-Mirón, Francisco García-Camacho, Emilio Molina Grima
Since the infection strategy in the baculovirus-insect cell system mostly affects production of the vector itself or the target product, and given that individual infection parameters interact with each other, the optimal combination must be established for each such specific system. In this work an artificial neural network was used to model infection strategy, including the cell concentration at infection, the multiplicity of infection, the medium recycle, and agitation intensity, and to evaluate the relative importance of each factor in the baculovirus production obtained...
August 4, 2017: Cytotechnology
https://www.readbyqxmd.com/read/28756527/synergistic-tumor-suppression-by-a-perilla-frutescens-derived-methoxyflavanone-and-anti-cancer-tyrosine-kinase-inhibitors-in-a549-human-lung-adenocarcinoma
#14
Amer Ali Abd El-Hafeez, Takashi Fujimura, Rikiya Kamei, Noriko Hirakawa, Kenji Baba, Kazuhisa Ono, Seiji Kawamoto
Anti-cancer tyrosine kinase inhibitors (TKIs) are effective in many types of cancers including non-small cell lung cancer, while appearance of TKI-resistant tumors suggests a need for the development of their potentiation strategies. We have previously shown that a methoxyflavanone derivative from the Asian medicinal herb Perilla frutescens (Perilla-derived methoxyflavanone; PDMF) shows a prominent anti-tumor activity against A549 human lung adenocarcinoma. Here we show that PDMF and anti-cancer TKIs (nilotinib, bosutinib, dasatinib, and ponatinib) synergistically suppress proliferation of A549 cells...
July 29, 2017: Cytotechnology
https://www.readbyqxmd.com/read/28755030/the-human-vascular-endothelial-cell-line-huv-ec-c-harbors-the-integrated-hhv-6b-genome-which-remains-stable-in-long-term-culture
#15
Setsuko Shioda, Fumio Kasai, Midori Ozawa, Noriko Hirayama, Motonobu Satoh, Yousuke Kameoka, Ken Watanabe, Norio Shimizu, Huamin Tang, Yasuko Mori, Arihiro Kohara
Human herpes virus 6 (HHV-6) is a common human pathogen that is most often detected in hematopoietic cells. Although human cells harboring chromosomally integrated HHV-6 can be generated in vitro, the availability of such cell lines originating from in vivo tissues is limited. In this study, chromosomally integrated HHV-6B has been identified in a human vascular endothelial cell line, HUV-EC-C (IFO50271), derived from normal umbilical cord tissue. Sequence analysis revealed that the viral genome was similar to the HHV-6B HST strain...
July 28, 2017: Cytotechnology
https://www.readbyqxmd.com/read/28752496/investigations-on-in-vitro-anti-carcinogenic-potential-of-l-carnosine-in-liver-cancer-cells
#16
Minghui Ding, Guihua Jiao, Haizhou Shi, Yanrong Chen
This study was carried out to investigate the anti-carcinogenic effect of L-carnosine in human carcinoma cells (SNU-423). The SNU-423 cancer cells were cultured at a density of 2 × 10(4) cells/well in Dulbecco modified Eagle medium. After 24 h of adherence, the cells were treated with L-carnosine (0.2 and 1 mg/mL) for 48 h. Then, cell viability was assessed by sulforhodamine assay, while mitochondrial dysfunction was measured by fluorescence microscopy using chromatin-specific dye Hoechst 33258. Intracellular levels of ROS were assayed by fluorescence spectroscopy with 2',7'-dichlorofluorescein diacetate (DCFDA)...
July 27, 2017: Cytotechnology
https://www.readbyqxmd.com/read/28710570/a-methoxyflavanone-derivative-from-the-asian-medicinal-herb-perilla-frutescens-induces-p53-mediated-g2-m-cell-cycle-arrest-and-apoptosis-in-a549-human-lung-adenocarcinoma
#17
Amer Ali Abd El-Hafeez, Takashi Fujimura, Rikiya Kamei, Noriko Hirakawa, Kenji Baba, Kazuhisa Ono, Seiji Kawamoto
Perilla frutescens is an Asian dietary herb consumed as an essential seasoning in Japanese cuisine as well as used for a Chinese medicine. Here, we report that a newly found methoxyflavanone derivative from P. frutescens (Perilla-derived methoxyflavanone, PDMF; 8-hydroxy-5,7-dimethoxyflavanone) shows carcinostatic activity on human lung adenocarcinoma, A549. We found that treatment with PDMF significantly inhibited cell proliferation and decreased viability through induction of G2/M cell cycle arrest and apoptosis...
July 14, 2017: Cytotechnology
https://www.readbyqxmd.com/read/28702859/spirulina-platensis-prevents-high-glucose-induced-oxidative-stress-mitochondrial-damage-mediated-apoptosis-in-cardiomyoblasts
#18
Pratiksha Jadaun, Dhananjay Yadav, Prakash Singh Bisen
The current study was undertaken to study the effect of Spirulina platensis (Spirulina) extract on enhanced oxidative stress during high glucose induced cell death in H9c2 cells. H9c2 cultured under high glucose (33 mM) conditions resulted in a noteworthy increase in oxidative stress (free radical species) accompanied by loss of mitochondrial membrane potential, release of cytochrome c, increase in caspase activity and pro-apoptotic protein (Bax). Spirulina extract (1 μg/mL), considerably inhibited increased ROS and RNS levels, reduction in cytochrome c release, raise in mitochondrial membrane potential, decreased the over expression of proapoptotic protein Bax and suppressed the Bax/Bcl2 ratio with induced apoptosis without affecting cell viability...
July 12, 2017: Cytotechnology
https://www.readbyqxmd.com/read/28689280/analysis-of-toxicity-effects-of-di-2-ethylhexyl-phthalate-exposure-on-human-bronchial-epithelial-16hbe-cells
#19
Yue Ma, Yinsheng Guo, Shuang Wu, Ziquan Lv, Qian Zhang, Xing Xie, Yuebin Ke
Recent studies have indicated that Di-(2-ethylhexyl) phthalate (DEHP), the most commonly used plasticizer in daily-life products, could be dispersed in indoor air and induce human exposure via inhalation. DEHP has been reported to have effects on the respiratory system in both animal and human researches. The toxicity effects of DEHP exposure on cell proliferation, cell cycle progression, apoptosis, global DNA methylation and the expression levels of DNA methyltransferases (DNMTs) were investigated in this study, using human epithelial cell line 16HBE as an in vitro model...
July 8, 2017: Cytotechnology
https://www.readbyqxmd.com/read/28689279/three-dimensional-culture-of-a-genetically-modified-hepatoma-cell-line-using-macroporous-gelatin-beads
#20
Jane Marie Tonello, Saori Kawashima, Kazuki Sato, Yoshinori Kawabe, Akira Ito, Masamichi Kamihira
Hepatoma cells are a candidate cell source for bio-artificial livers. However, they exhibit reduced liver functions compared with primary hepatocytes. In our previous study, genetically engineered mouse hepatoma cells were created by transduction with vectors mediating inducible overexpression of eight liver-enriched transcription factors. Upon the induction of the liver-enriched transcription factors transduced, the cells expressed both phenotypic and genotypic liver functions at high levels. In the present study, we performed three-dimensional culture of these cells using macroporous gelatin beads...
July 8, 2017: Cytotechnology
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