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https://www.readbyqxmd.com/read/28334838/neutrophil-mediated-il-6-receptor-trans-signaling-and-the-risk-of-chronic-obstructive-pulmonary-disease-and-asthma
#1
Neda Farahi, Ellie Paige, Jozef Balla, Emily Prudence, Ricardo C Ferreira, Mark Southwood, Sarah L Appleby, Per Bakke, Amund Gulsvik, Augusto A Litonjua, David Sparrow, Edwin K Silverman, Michael H Cho, John Danesh, Dirk S Paul, Daniel F Freitag, Edwin R Chilvers
The Asp358Ala variant in the interleukin-6 receptor (IL-6R) gene has been implicated in asthma, autoimmune and cardiovascular disorders, but its role in other respiratory conditions such as chronic obstructive pulmonary disease (COPD) has not been investigated. The aims of this study were to evaluate whether there is an association between Asp358Ala and COPD or asthma risk, and to explore the role of the Asp358Ala variant in sIL-6R shedding from neutrophils and its pro-inflammatory effects in the lung. We undertook logistic regression using data from the UK Biobank and the ECLIPSE COPD cohort...
February 17, 2017: Human Molecular Genetics
https://www.readbyqxmd.com/read/28329914/ginsenoside-rg3-restores-hepatitis-c-virus-induced-aberrant-mitochondrial-dynamics-and-inhibits-virus-propagation
#2
Seong-Jun Kim, Jae Young Jang, Eun-Jung Kim, Eun Kyung Cho, Dae Gyun Ahn, Chonsaeng Kim, Han Seul Park, Soung Won Jeong, Sae Hwan Lee, Sang Gyune Kim, Young Seok Kim, Hong Soo Kim, Boo Sung Kim, Ji-Hyung Lee, Aleem Siddiqui
Hepatitis C virus (HCV) alters mitochondrial dynamics associated with persistent viral infection and suppression of innate immunity. Mitochondrial dysfunction is also a pathologic feature of direct-acting antiviral (DAA) treatment. Despite the high efficacy of DAAs, their treatment of patients with chronic hepatitis C in interferon-sparing regimens occasionally produces undesirable side effects such as fatigue, migraine and other conditions, which may be linked to mitochondrial dysfunction. Here we show that clinically prescribed DAAs, including Sofosbuvir, affect mitochondrial dynamics...
March 22, 2017: Hepatology: Official Journal of the American Association for the Study of Liver Diseases
https://www.readbyqxmd.com/read/28303029/tmf-and-glycitin-act-synergistically-on-keratinocytes-and-fibroblasts-to-promote-wound-healing-and-anti-scarring-activity
#3
Ga Young Seo, Yoongho Lim, Dongsoo Koh, Jung Sik Huh, Changlim Hyun, Young Mee Kim, Moonjae Cho
Keratinocyte-fibroblast interactions are critical for skin repair after injury. During the proliferative phase of wound healing, proliferation, migration and differentiation of these cells are the major mechanisms leading to tissue remodeling. We have previously reported that glycitin, a major soy isoflavone, stimulates dermal fibroblast proliferation; and the phytochemical, 4',6,7-trimethoxyisoflavone (TMF), induces migration of HaCaT keratinocyte cells. We therefore investigated whether these compounds display synergistic effects on skin cells during wound healing in vitro and in vivo...
March 17, 2017: Experimental & Molecular Medicine
https://www.readbyqxmd.com/read/28295162/evaluation-of-two-public-genome-references-for-chinese-hamster-ovary-cells-in-the-context-of-rna-seq-based-gene-expression-analysis
#4
Chun Chen, Huong Le, Chetan T Goudar
RNA-Seq is a powerful transcriptomics tool for mammalian cell culture process development. Successful RNA-Seq data analysis requires a high quality reference for read mapping and gene expression quantification. Currently, there are two public genome references for Chinese hamster ovary (CHO) cells, the predominant mammalian cell line in the biopharmaceutical industry. In this study, we compared these two references by analyzing 60 RNA-Seq samples from a variety of CHO cell culture conditions. Among the 20,891 common genes in both references, we observed that 31...
March 15, 2017: Biotechnology and Bioengineering
https://www.readbyqxmd.com/read/28285402/a-semi-empirical-glycosylation-model-of-a-camelid-monoclonal-antibody-under-hypothermia-cell-culture-conditions
#5
Hengameh Aghamohseni, Maureen Spearman, Kaveh Ohadi, Katrin Braasch, Murray Moo-Young, Michael Butler, Hector M Budman
The impact of cell culture environment on the glycan distribution of a monoclonal antibody (mAb) has been investigated through a combination of experiments and modeling. A newly developed CHO DUXB cell line was cultivated at two levels of initial Glutamine (Gln) concentrations (0, 4 mM) and incubation temperatures of (33 and 37 °C) in batch operation mode. Hypothermia was applied either through the entire culture duration or only during the post-exponential phase. Beyond reducing cell growth and increasing productivity, hypothermia significantly altered the galactosylation index profiles as compared to control conditions...
March 11, 2017: Journal of Industrial Microbiology & Biotechnology
https://www.readbyqxmd.com/read/28284600/seroprevalence-for-2117-like-vesiviruses-in-italian-household-dogs
#6
Barbara Di Martino, Federica Di Profio, Livia Bodnar, Irene Melegari, Vittorio Sarchese, Ivano Massirio, Giulia Dowgier, Gianvito Lanave, Fulvio Marsilio, Krisztián Bányai, Canio Buonavoglia, Vito Martella
In 2003, a novel calicivirus, the vesivirus (VeV) strain 2117, was identified incidentally as a contaminant in Chinese Hamster Ovary (CHO) cell cultures by a German pharmaceutical company. Similar contaminations have been documented in three additional episodes, in bio-reactors used for production of recombinant drugs. More, recently 2117-like VeVs have also been identified at high prevalence in the stools from asymptomatic kennel dogs and only sporadically in diarrhoeic and healthy household dogs. In this study, antibodies for 2117-like viruses were detected in 21...
March 2017: Veterinary Microbiology
https://www.readbyqxmd.com/read/28283090/cytotoxicities-and-genotoxicities-of-cements-based-on-calcium-silicate-and-of-dental-formocresol
#7
Hyunjung Ko, Youngdan Jeong, Miri Kim
Increasing interest is being paid to the toxicities of dental materials. The purpose of this study was to determine the cytotoxicities and genotoxicities of endodontic compounds to Chinese hamster ovary (CHO-K1) reproductive cells. Cultured CHO-K1 cells were treated with dental formocresol, two types of calcium hydroxide paste, and two types of mineral trioxide aggregate cement for 24h. A 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide assay was performed on each culture, and the micronucleus frequency was determined by performing a micronucleus assay...
March 2017: Mutation Research
https://www.readbyqxmd.com/read/28281882/efficient-expression-of-stable-recombinant-human-insulin-like-growth-factor-1-fusion-with-human-serum-albumin-in-chinese-hamster-ovary-cells
#8
Aini Wan, Dongsheng Xu, Kedong Liu, Lin Peng, Yanfei Cai, Yun Chen, Yang He, Jianfeng Yang, Jian Jin, Huazhong Li
Insulin-like growth factor-1 (IGF-1) plays a crucial role in cell development, differentiation and metabolism and has been a potential therapeutic agent for many diseases. Chinese hamster ovary (CHO) cells are widely used for production of recombinant therapeutic proteins, but the expression level of IGF-1 in CHO cells is very low (1500 µg/L) and the half-life of IGF-1 in blood circulation is only 4.5 min according to previously studies. Therefore, IGF-1 was fused to long-circulating serum protein HSA and expressed in CHO cells...
March 10, 2017: Preparative Biochemistry & Biotechnology
https://www.readbyqxmd.com/read/28281868/binding-and-biologic-characterization-of-recombinant-human-serum-albumin-etgfbr2-fusion-protein-expressed-in-cho-cells
#9
Aini Wan, Yana Miao, Lin Peng, Yanfei Cai, Yun Chen, Yang He, Jianfeng Yang, Jian Jin, Huazhong Li
Transforming growth factor-β1 (TGF-β1) signaling is involved in cell metabolism, growth, differentiation, carcinoma invasion and fibrosis development, which suggests TGF-β1 can be treated as a therapeutic target extensively. Because TGF-β1 receptor type α(TGFBR2) is the directed and essential mediator for TGF-β1 signals, the extracellular domain of TGFBR2 (eTGFBR2), binding partner for TGF-β1, has been produced in a series of expression systems to inhibit TGF-β1 signaling. However, eTGFBR2 is unstable with a short half-life predominantly because of enzymatic degradation and kidney clearance...
February 17, 2017: Bioengineered
https://www.readbyqxmd.com/read/28281648/proteomic-analysis-of-host-cell-protein-dynamics-in-the-culture-supernatants-of-antibody-producing-cho-cells
#10
Jin Hyoung Park, Jong Hwa Jin, Myung Sin Lim, Hyun Joo An, Jong Won Kim, Gyun Min Lee
Chinese hamster ovary (CHO) cells are the most common cell line used for the production of therapeutic proteins including monoclonal antibodies (mAbs). Host cell proteins (HCPs), secreted and released from lysed cells, accumulate extracellularly during the cultures of recombinant CHO (rCHO) cells, potentially impairing product quality. In an effort to maintain good mAb quality during the cultures, HCPs accumulated extracellularly in batch and fed-batch cultures of a mAb-producing rCHO cell line were identified and quantified by nanoflow liquid chromatography-tandem mass spectrometry, followed by their gene ontology and functional analysis...
March 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28275182/modulation-of-hcv-specific-cd8-effector-t-cell-function-with-antiviral-effect-in-infectious-hepatitis-c-virus-co-culture-model
#11
Keisuke Ojiro, Xiaowang Qu, Hyosun Cho, Jang-June Park, Annelise Vuidepot, Nikolai Lissin, Peter E Molloy, Alan Bennett, Bent K Jakobsen, David E Kaplan, James L Riley, Kyong-Mi Chang
Antiviral effects of hepatitis C virus (HCV)-specific CD8 T-cells have been shown in HCV replicon, but not in authentic infectious cell culture system (HCVcc). Here, we developed tools to examine the antigenicity of HCV-infected HLA A2+ Huh7.5 hepatoma cells (Huh7.5A2) in activating HCV-specific CD8 T-cells with downstream antiviral effects. Infectious HCV epitope mutants encoding well-defined genotype 1a-derived HLA A2-restricted HCV NS3 1073 or NS5 2594 epitope were generated from genotype 2a-derived HCV clone (Jc1Gluc2A) by site-directed mutagenesis...
March 8, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28274871/an-improved-high-efficiency-assay-for-assessing-serum-anticholinergic-activity-using-cultured-cells-stably-expressing-m1-receptors
#12
José N Nobrega, Roger J Raymond, Bruce G Pollock
Assessments of total anticholinergic activity (SAA) in serum are of considerable interest for its potential involvement in cognitive impairment associated with polydrug states in the elderly and other populations. Such estimations have been based on the displacement of radioligand binding in rat brain tissues. The validity of such measurements has been questioned, as a potentially distorting effect of large serum proteins was identified. We sought to develop a modified assay that would be more efficient and free of this potential confound...
March 6, 2017: Journal of Pharmacological and Toxicological Methods
https://www.readbyqxmd.com/read/28274569/predictive-value-of-circulating-tumor-cells-ctcs-captured-by-microfluidic-device-in-patients-with-epithelial-ovarian-cancer
#13
Maria Lee, Eun Jae Kim, Youngnam Cho, Sunshin Kim, Hyun Hoon Chung, Noh Hyun Park, Yong-Sang Song
OBJECTIVE: To test an electrically conductive chip, incorporating a nanoroughened microfluidic platform for the capture of circulating tumor cells (CTCs), and assess its clinical merit in instances of epithelial ovarian cancer (EOC). METHODS: A total of 54 patients with EOC recruited between August 2014 and May 2015 were enrolled in this prospective study. CTCs in peripheral blood were detected in advance of primary tumor resection and before initiating adjuvant chemotherapy for recurrent disease...
March 5, 2017: Gynecologic Oncology
https://www.readbyqxmd.com/read/28272457/novel-vaccine-potential-of-rv3131-a-dosr-regulon-encoded-putative-nitroreductase-against-hyper-virulent-mycobacterium-tuberculosis-strain-k
#14
Kee Woong Kwon, Woo Sik Kim, Hongmin Kim, Seung Jung Han, Mi-Young Hahn, Jong Seok Lee, Ki Taek Nam, Sang-Nae Cho, Sung Jae Shin
Accumulating evidence indicates that latency-associated Mycobacterium tuberculosis (Mtb)-specific antigens from the dormancy survival regulator regulon (DosR) may be promising novel vaccine target antigens for the development of an improved tuberculosis vaccine. After transcriptional profiling of DosR-related genes in the hyper-virulent Beijing Mtb strain K and the reference Mtb strain H37Rv, we selected Rv3131, a hypothetical nitroreductase, as a vaccine antigen and evaluated its vaccine efficacy against Mtb K...
March 8, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28271647/mycobacterium-kansasii-pneumonia-with-mediastinal-lymphadenitis-in-a-patient-with-acute-myeloid-leukemia-successful-treatment-to-stem-cell-transplantation
#15
Yeon Geun Choi, Sung Yeon Cho, Dong Gun Lee, Eunjung Yim, Hyonsoo Joo, Seongyul Ryu, Jae Ki Choi, Hee Je Kim
Non-tuberculous mycobacterial (NTM) disease is a relatively rare cause of neutropenic fever in patients with hematologic malignancies. During the neutropenic period, performing invasive procedures for microbiological or pathological confirmation is difficult. In addition, the optimal treatment duration for NTM disease in patients with leukemia, especially prior to stem cell transplantation (SCT), has not been documented. Therefore, we report a case of pneumonia with necrotizing lymphadenitis caused by Mycobacterium kansasii diagnosed during chemotherapy being performed for acute myeloid leukemia...
January 19, 2017: Infection & Chemotherapy
https://www.readbyqxmd.com/read/28269207/effects-of-extremely-low-frequency-electromagnetic-fields-on-in-vitro-cellular-cultures-hela-and-cho
#16
A F Restrepo, V E Tobar, R J Camargo, E Franco, C R Pinedo, O Gutierrez
This paper presents the cellular proliferation effects of the exposure to extremely low frequency electromagnetic fields (ELF-EMF) on in-vitro cellular cultures HeLa and CHO. Through the magnetic stimulation system (MSS) the cells were exposed to magnetic fields with sinusoidal waveform at 50 Hz; initially for 40 minutes at intensities of 0.4 mT, 1.4 mT, 2.13 mT, 2.49 mT and 2.53 mT in parallel and perpendicular directions to the culture plates. Subsequently, the repetitive electromagnetic field (rEMF) was applied to 2...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28260346/mass-based-metabolomic-analysis-of-lactobacillus-sakei-and-its-growth-media-at-different-growth-phases
#17
Sang Bong Lee, Young Kyoung Rhee, Eun-Ji Gu, Dong-Wook Kim, Gwang-Ju Jang, Seong-Hwa Song, Jae-In Lee, Bo-Min Kim, Hyeon-Jeong Lee, Hee-Do Hong, Chang-Won Cho, Hyun-Jin Kim
Changes in the metabolite profiles of Lactobacillus sakei and its growth media, based on different culture times (0, 6, 12 and 24 h), were investigated using gas chromatography-mass spectrometry (GC-MS) and liquid chromatography-MS (LC-MS) with partial least squares discriminant analysis (PLS-DA), in order to understand the growth characteristics of this organism. Cell and media samples of L. sakei were significantly separated on PLS-DA score plots. Cell [28] and media [7] metabolites including sugars, amino acids, and organic acids were identified as major metabolites contributing to the difference among samples...
March 6, 2017: Journal of Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28252038/a-systematic-approach-to-time-series-metabolite-profiling-and-rna-seq-analysis-of-chinese-hamster-ovary-cell-culture
#18
Han-Hsiu Hsu, Michihiro Araki, Masao Mochizuki, Yoshimi Hori, Masahiro Murata, Prihardi Kahar, Takanobu Yoshida, Tomohisa Hasunuma, Akihiko Kondo
Chinese hamster ovary (CHO) cells are the primary host used for biopharmaceutical protein production. The engineering of CHO cells to produce higher amounts of biopharmaceuticals has been highly dependent on empirical approaches, but recent high-throughput "omics" methods are changing the situation in a rational manner. Omics data analyses using gene expression or metabolite profiling make it possible to identify key genes and metabolites in antibody production. Systematic omics approaches using different types of time-series data are expected to further enhance understanding of cellular behaviours and molecular networks for rational design of CHO cells...
March 2, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28251404/the-enhancement-of-antibody-concentration-and-achievement-of-high-cell-density-cho-cell-cultivation-by-adding-nucleoside
#19
Yasuhiro Takagi, Takuya Kikuchi, Ryuta Wada, Takeshi Omasa
Recently, with the dramatic increase in demand for therapeutic antibodies, Chinese hamster ovary (CHO) cell culture systems have made significant progress in recombinant antibody production. Over the past two decades, recombinant antibody productivity has been improved by more than 100-fold. Medium optimization has been identified as an important key approach for increasing product concentrations. In this study, we evaluated the effects of deoxyuridine addition to fed-batch cultures of antibody-expressing CHO cell lines...
March 2, 2017: Cytotechnology
https://www.readbyqxmd.com/read/28251120/the-proliferative-potential-of-human-cardiac-stem-cells-was-unaffected-after-a-long-term-cryopreservation-of-tissue-blocks
#20
Toru Hosoda, Nobuo Iguchi, Yasunori Cho, Masaki Inoue, Tsutomu Murakami, Minoru Tabata, Shuichiro Takanashi, Hitonobu Tomoike
BACKGROUND: Human c-kit-positive cardiac stem cells (CSCs) have been used to treat patients suffering from ischemic cardiomyopathy. This study aimed to investigate whether a long-term storage of cardiac tissues would influence the growth potential of the subsequently isolated CSCs. METHODS: A total of 34 fresh samples were obtained from various cardiac regions [right atrium (RA), left atrium (LA), and/or left ventricle (LV)] of 21 patients. From 12 of these patients, 18 samples kept frozen for ~2 years were employed to prepare and characterize the CSCs...
February 2017: Annals of Translational Medicine
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