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https://www.readbyqxmd.com/read/29238471/the-effects-of-specific-expression-of-apoptin-under-the-control-of-pses-and-psa-promoter-on-cell-death-and-apoptosis-of-lncap-cells
#1
Vida Mohammadi, Abbas Behzad Behbahani, Gholam Reza Rafiee, Seyed Younes Hosseini, Marzieh Alizadeh Zarei, Mohammad Ali Okhovat, Mohammad Ali Takhshid
Objectives: Apoptotic effect of apoptin has been demonstrated in numerous studies. However, its tumor specificity has been questioned by some reports. The aim of this study was to confine the expression of apoptin in the prostate tumor cells by inducing its gene expression under the control of a chimeric enhancer composing of prostate-specific membrane antigen (PSMA) and prostate-specific antigen (PSA) regulatory elements (PSES). Furthermore, we investigated the effects of apoptin expression on LNCaP prostate carcinoma cell survival and apoptosis using MTT assay and annexin V/7-AAD flow cytometry assay...
December 2017: Iranian Journal of Basic Medical Sciences
https://www.readbyqxmd.com/read/29228955/high-efficiency-generation-of-induced-pluripotent-stem-cells-from-human-foreskin-fibroblast-cells-using-the-sagunja-tang-herbal-formula
#2
Ki Mo Kim, Deok Rim Heo, Joo Young Lee, Chang-Seob Seo, Sun-Ku Chung
BACKGROUND: Sagunja-Tang (SGT-4) is a traditional herbal formula in Korean medicine that is used to treat anti-metabolic syndrome, and has antioxidant activity. In this study, we evaluated the effects of SGT-4 on the formation efficiency of induced pluripotent stem cells (iPSCs) from human foreskin fibroblasts (HFFs) by four reprogramming transcription factors: Oct4, Sox2, KIf4, and c-Myc (OSKM). METHODS: SGT-4 contained four different herbal medicines that are composed of Ginseng Radix, Glycyrrhizae Radix et Rhizoma, Atractylodis Rhizoma Alba, and Poria Sclerotium...
December 11, 2017: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/29228419/expression-and-clinical-significance-of-long-non-coding-rna-ghet1-in-pancreatic-cancer
#3
H-Y Zhou, H Zhu, X-Y Wu, X-D Chen, Z-G Qiao, X Ling, X-M Yao, J-H Tang
OBJECTIVE: To investigate the expression level and biological function of long non-coding RNA gastric carcinoma high expressed transcript 1 (lncRNA-GHET1) in pancreatic ductal adenocarcinoma (pancreatic cancer for short), to analyze the correlation between the expression of GHET1 and clinicopathological features and to explore the role and clinical significance of GHET1 in the development and progression of pancreatic cancer. PATIENTS AND METHODS: The relative expression of GHET1 in 5 human pancreatic cancer cell lines was detected by quantitative Real-time polymerase chain reaction (qRT-PCR)...
November 2017: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/29216299/recombinant-vaccinia-virus-coded-interferon-inhibitor-b18r-expression-refolding-and-a-use-in-a-mammalian-expression-system-with-a-rna-vector
#4
Yuriy G Kim, Aliya Zh Baltabekova, Erzhan E Zhiyenbay, Altynai S Aksambayeva, Zhadyra S Shagyrova, Rinat Khannanov, Erlan M Ramanculov, Alexandr V Shustov
B18R protein of Vaccinia virus binds to type I interferons and inhibits activation of interferon-mediated signal transduction. Cells which have unimpaired interferon signaling such as primary cell cultures or some industrially important cell lines are capable of development of an antiviral state. An establishment of the antiviral state limits replication of RNA-viruses and can suppress replication of RNA vectors. The interferon inhibitor B18R effectively prevents the establishment of the antiviral state. For this reason, B18R has become a ubiquitous component of protocols for epigenetic reprogramming which use transfections of RNA replicons or mRNA...
2017: PloS One
https://www.readbyqxmd.com/read/29212205/jnk-inhibitor-alleviates-apoptosis-of-fetal-neural-stem-cells-induced-by-emulsified-isoflurane
#5
Lei Zhou, Zeyong Yang, Xianfu Lu, Xingxing Li, Xiaohu An, Jing Chai, Qiling Yang, Shikai Yan, Yuanhai Li
Isoflurane can provide both neuroprotection and neurotoxicity in various culture models and in rodent developing brains. Emulsified Isoflurane (EI) is an emulsion formulation of isoflurane, while its underlying molecular mechanism of developemental nerve toxicity largely remains unclear. We hypothesized that EI induced fetal neural stem cells (FNSCs) apoptosis, endoplasmic reticulum (ER) stress and c-Jun N-terminal kinase (JNK) activation. FNSCs were isolated from the cortex of SD rats during 14 days of gestation...
November 7, 2017: Oncotarget
https://www.readbyqxmd.com/read/29211954/sirna-delivery-with-chitosan-influence-of-chitosan-molecular-weight-degree-of-deacetylation-and-amine-to-phosphate-ratio-on-in-vitro-silencing-efficiency-hemocompatibility-biodistribution-and-in-vivo-efficacy
#6
Mohamad Gabriel Alameh, Marc Lavertu, Nicolas Tran-Khanh, Chi-Yuan Chang, Frédéric Lesage, Martine Bail, Vincent Darras, Anik Chevrier, Michael D Buschmann
Chitosan (CS) shows in vitro and in vivo efficacy for siRNA delivery, but with contradictory findings for incompletely characterized systems. To understand which parameters produce effective delivery, a library of precisely characterized chitosans was produced at different DDAs and Mn. Encapsulation and transfection efficiencies were characterized in vitro. Formulations were selected to examine the influence of Mn and N:P ratio on nanoparticle uptake, metabolic activity, genotoxicity, and in vitro transfection...
December 6, 2017: Biomacromolecules
https://www.readbyqxmd.com/read/29208281/overcoming-stc2-mediated-drug-resistance-through-drug-and-gene-co-delivery-by-phb-pdmaema-cationic-polyester-in-liver-cancer-cells
#7
Hongwei Cheng, Zhixian Wu, Caisheng Wu, Xiaoyuan Wang, Sing Shy Liow, Zibiao Li, Yun-Long Wu
Stanniocalcin 2 (STC2) overexpression in hepatocellular carcinoma (HCC) could lead to poor prognosis, which might be due to its induced P-glycoprotein and Bcl-2 protein expression level increase. P-glycoprotein or membrane pump induced drug efflux and altered prosurvival Bcl-2 expression are key mechanisms for drug resistance leading to failure of chemotherapy in HCC. However, current strategy to overcome both P-glycoprotein and Bcl-2 protein induced drug resistance was rarely reported. In this work, we utilized an amphiphilic poly[(R)-3-hydroxybutyrate] (PHB)-b-poly(2-(dimethylamino)ethyl methacrylate) (PDMAEMA) cationic polyester to encapsulate chemotherapeutic paclitaxel (PTX) in hydrophobic PHB domain and Bcl-2 convertor Nur77/ΔDBD gene (Nur77 without DNA binding domain for mitochondria localization) by formation of polyplex due to cationic PDMAEMA segment, to effectively inhibit the drug resistant HepG2/STC2 and SMCC7721/STC2 liver cancer cell growth...
February 1, 2018: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/29193962/cell-penetrating-polymers-containing-guanidinium-trigger-apoptosis-in-human-hepatocellular-carcinoma-cells-unless-conjugated-to-a-targeting-n-acetyl-galactosamine-block
#8
Zhe Tan, Yogesh K Dhande, Theresa M Reineke
A series of 3-guanidinopropyl methacrylamide (GPMA)-based polymeric gene delivery vehicles were developed via aqueous reversible addition-fragmentation chain transfer (RAFT) polymerization. The polymers have been evaluated for their cellular internalization ability, transfection efficiency, and cytotoxicity. Two homopolymers: P(GPMA20), P(GPMA34), were synthesized to study the effect of guanidium polymer length on delivery efficiency and toxicity. In addition, an N-acetyl-d-galactosamine (GalNAc)-based hydrophilic block was incorporated to produce diblock polymers, which provides a neutral hydrophilic block that sterically protects plasmid-polymer complexes (polyplexes) from colloidal aggregation and aids polyplex targeting to hepatocytes via binding to asialoglycoprotein receptors (ASGPRs)...
December 1, 2017: Bioconjugate Chemistry
https://www.readbyqxmd.com/read/29193391/dihydromyricetin-inhibits-nlrp3-inflammasome-dependent-pyroptosis-by-activating-the-nrf2-signaling-pathway-in-vascular-endothelial-cells
#9
Qin Hu, Ting Zhang, Long Yi, Xi Zhou, Mantian Mi
Increasing evidence demonstrates that pyroptosis, pro-inflammatory programmed cell death, is linked to atherosclerosis; however, the underlying mechanisms remain to be elucidated. Dihydromyricetin (DHM), a natural flavonoid, was reported to exert anti-oxidative and anti-inflammatory bioactivities. However, the effect of DHM on atherosclerosis-related pyroptosis has not been studied. In the present study, palmitic acid (PA) treatment led to pyroptosis in human umbilical vein endothelial cells (HUVECs), as evidenced by caspase-1 activation, LDH release, and propidium iodide-positive staining; enhanced the maturation and release of proinflammatory cytokine IL-1β and activation of the NLRP3 inflammasome; and markedly increased intracellular reactive oxygen species (ROS) and mitochondrial ROS (mtROS) levels...
November 29, 2017: BioFactors
https://www.readbyqxmd.com/read/29188718/polyplex-micelles-with-phenylboronate-gluconamide-crosslinking-in-the-core-exerting-promoted-gene-transfection-through-spatio-temporal-responsivity-to-intracellular-ph-and-atp-concentration
#10
Naoto Yoshinaga, Takehiko Ishii, Mitsuru Naito, Taisuke Endo, Satoshi Uchida, Horacio Cabral, Kensuke Osada, Kazunori Kataoka
Polyplexes as gene delivery carriers require integrated functionalities to modulate intracellular trafficking for efficient gene transfection. Herein, we developed plasmid DNA (pDNA)-loaded polyplex micelles (PMs) from poly(ethylene glycol) (PEG)-based block catiomers derivatized with 4-carboxy-3-fluorophenylboronic acid (FPBA) and D-gluconamide (GlcAm) to form pH- and ATP-responsive crosslinking in the core. These PMs exhibited robustness in the extracellular milieu, smooth endosomal escape after cellular uptake, and facilitated pDNA decondensation triggered by increased ATP concentration inside of the cell...
November 30, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/29180951/p2x2-dominant-deafness-mutations-have-no-negative-effect-on-wild-type-isoform-implications-for-functional-rescue-and-in-deafness-mechanism
#11
Yan Zhu, Juline Beudez, Ning Yu, Thomas Grutter, Hong-Bo Zhao
The P2X2 receptor is an ATP-gated ion channel, assembled by three subunits. Recently, it has been found that heterozygous mutations of P2X2 V60L and G353R can cause autosomal dominant nonsyndromic hearing loss. However, the underlying mechanism remains unclear. The fact that heterozygous mutations cause deafness suggests that the mutations may have dominant-negative effect (DNE) on wild-type (WT) P2X2 isoforms and/or other partners leading to hearing loss. In this study, the effect of these dominant deafness P2X2 mutations on WT P2X2 was investigated...
2017: Frontiers in Molecular Neuroscience
https://www.readbyqxmd.com/read/29176845/minimal-2-o-methyl-phosphorothioate-linkage-modification-pattern-of-synthetic-guide-rnas-for-increased-stability-and-efficient-crispr-cas9-gene-editing-avoiding-cellular-toxicity
#12
Megan Basila, Melissa L Kelley, Anja van Brabant Smith
Since its initial application in mammalian cells, CRISPR-Cas9 has rapidly become a preferred method for genome engineering experiments. The Cas9 nuclease is targeted to genomic DNA using guide RNAs (gRNA), either as the native dual RNA system consisting of a DNA-targeting CRISPR RNA (crRNA) and a trans-activating crRNA (tracrRNA), or as a chimeric single guide RNA (sgRNA). Entirely DNA-free CRISPR-Cas9 systems using either Cas9 protein or Cas9 mRNA and chemically synthesized gRNAs allow for transient expression of CRISPR-Cas9 components, thereby reducing the potential for off-targeting, which is a significant advantage in therapeutic applications...
2017: PloS One
https://www.readbyqxmd.com/read/29175439/lipid-coated-chitosan-dna-nanoparticles-for-enhanced-gene-delivery
#13
Elias Baghdan, Shashank Reddy Pinnapireddy, Boris Strehlow, Konrad H Engelhardt, Jens Schäfer, Udo Bakowsky
Chitosan as a polycationic non-viral vector for gene delivery has the advantage of being a biocompatible and biodegradable polymer. However, without laborious chemical modifications to its structure, it is of limited use as a gene delivery vehicle due to its low ability to efficiently transfect under physiological conditions. To address this problem, we developed novel liposome encapsulated chitosan nanoparticles; lipochitoplexes (LCPs). Chitosan nanoparticles (CsNPs) were obtained using the ionic gelation technique...
November 22, 2017: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/29174694/synergistic-promoting-effects-of-bone-morphogenetic-protein-12-connective-tissue-growth-factor-on-functional-differentiation-of-tendon-derived-stem-cells-and-patellar-tendon-window-defect-regeneration
#14
Kang Xu, Yanjun Sun, Mohanad Kh Al-Ani, Chunli Wang, Yongqiang Sha, Kl Paul Sung, Nianguo Dong, Xuefeng Qiu, Li Yang
Current study investigated bone morphogenetic protein 12 (BMP12) and connective tissue growth factor (CTGF) activate tendon derived stem cells (TDSCs) tenogenic differentiation, and promotion of injured tendon regeneration. TDSCs were transfected with BMP12 and CTGF via recombinant adenovirus (Ad) infection. Gene transfection efficiency, cell viability and cytotoxicity, tenogenic gene expression, collagen I/III synthesis were evaluated in vitro. For the in vivo study, the transfected cells were transplanted into the rat patellar tendon window defect...
November 7, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/29173063/development-of-a-pre-glycoengineered-cho-k1-host-cell-line-for-the-expression-of-antibodies-with-enhanced-fc-mediated-effector-function
#15
Oliver Popp, Samuel Moser, Jörg Zielonka, Petra Rüger, Silke Hansen, Oliver Plöttner
Novel biotherapeutic glycoproteins, like recombinant monoclonal antibodies (mAbs) are widely used for the treatment of numerous diseases. The N-glycans attached to the constant region of an antibody have been demonstrated to be crucial for the biological efficacy. Even minor modifications of the N-glycan structure can dictate the potency of IgG effector functions such as the antibody-dependent cell-mediated cytotoxicity (ADCC) and complement-dependent cytotoxicity (CDC). Here, we present the development of a glycoengineered CHO-K1 host cell line (HCL), stably expressing β1,4-N-Acetylglucoseaminyltransferase III (GnT-III) and α-mannosidase II (Man-II), for the expression of a-fucosylated antibodies with enhanced Fc-mediated effector function...
November 27, 2017: MAbs
https://www.readbyqxmd.com/read/29170489/prokaryotic-soluble-expression-and-purification-of-bioactive-human-fibroblast-growth-factor-21-using-maltose-binding-protein
#16
Anh Ngoc Nguyen, Jung-A Song, Minh Tan Nguyen, Bich Hang Do, Grace G Kwon, Sang Su Park, Jiwon Yoo, Jaepyeong Jang, Jonghwa Jin, Mark J Osborn, Yeon Jin Jang, Thu Trang Thi Vu, Heung-Bum Oh, Han Choe
Human fibroblast growth factor 21 (hFGF21) has been characterized as an important regulator of glucose and lipid metabolism homeostasis. Here, to produce hFGF21 efficiently in Escherichia coli, the expression and solubility of hFGF21 were tested and optimised by fusing the protein with one of eight tags: hexahistidine (His6), thioredoxin (Trx), small ubiquitin-related modifier (Sumo), glutathione S-transferase (GST), maltose-binding protein (MBP), N-utilisation substance protein A (NusA), human protein disulphide isomerase (PDI), and the b'a' domain of PDI (PDIb'a')...
November 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29169426/-knockdown-of-alox5-gene-promotes-apoptosis-of-k562-adm-cells
#17
Yujie Luo, Min Xu, Wenwan Gao, Kun Tao
Objective To investigate the effect of short hairpin RNA (shRNA) knockdown of arachidonate 5-lipoxygenase (Alox5) gene on the apoptosis of resistant chronic myeloid leukemia K562/ADM cells. Methods Three pairs of shRNA fragment targeting human Alox5 gene were synthesized and inserted into pGenesil-1 interference vector. Enzyme digestion and sequencing were performed to identify the recombinant plasmid pGenesil-1-shRNA-Alox5. The plasmid was then transfected into K562/ADM cells. Real-time quantitative PCR and Western blotting were used to detect the Alox5 mRNA and protein levels to get the best interference group...
October 2017: Xi Bao Yu Fen Zi Mian Yi Xue za Zhi, Chinese Journal of Cellular and Molecular Immunology
https://www.readbyqxmd.com/read/29167826/efficient-in-vitro-delivery-of-noggin-sirna-enhances-osteoblastogenesis
#18
S Ghadakzadeh, R C Hamdy, M Tabrizian
Several types of serious bone defects would not heal without invasive clinical intervention. One approach to such defects is to enhance the capacity of bone-formation cells. Exogenous bone morphogenetic proteins (BMP) have been utilized to positively regulate matrix mineralization and osteoblastogenesis, however, numerous adverse effects are associated with this approach. Noggin, a potent antagonist of BMPs, is an ideal candidate to target and decrease the need for supraphysiological doses of BMPs. In the current research we report a novel siRNA-mediated gene knock-down strategy to down-regulate Noggin...
November 2017: Heliyon
https://www.readbyqxmd.com/read/29163577/combination-of-the-endogenous-lhcsr1-promoter-and-codon-usage-optimization-boosts-protein-expression-in-the-moss-physcomitrella-patens
#19
Manuel Hiss, Lucas Schneider, Christopher Grosche, Melanie A Barth, Christina Neu, Aikaterini Symeonidi, Kristian K Ullrich, Pierre-François Perroud, Mareike Schallenberg-Rüdinger, Stefan A Rensing
The moss Physcomitrella patens is used both as an evo-devo model and biotechnological production system for metabolites and pharmaceuticals. Strong in vivo expression of genes of interest is important for production of recombinant proteins, e.g., selectable markers, fluorescent proteins, or enzymes. In this regard, the choice of the promoter sequence as well as codon usage optimization are two important inside factors to consider in order to obtain optimum protein accumulation level. To reliably quantify fluorescence, we transfected protoplasts with promoter:GFP fusion constructs and measured fluorescence intensity of living protoplasts in a plate reader system...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/29159141/the-effect-of-cell-penetrating-peptides-on-transfection-activity-and-cytotoxicity-of-polyallylamine
#20
Sarvenaz Sabouri-Rad, Reza Kazemi Oskuee, Asma Mahmoodi, Leila Gholami, Bizhan Malaekeh-Nikouei
Introduction: Cationic polymers have the potential to be modified to achieve an ideal gene vector lacking viral vector defects. The aim of the present study was to improve polyallylamine (PAA) transfection efficiency and to reduce cytotoxicity by incorporating of cell-penetrating peptides (CPPs). Methods: To prepare the peptide-based polyplexes, PAA (15 kDa) was modified with 2 peptides (TAT and CyLoP-1) by covering the 0.5% and 1% of amines. Buffer capacity and DNA condensation ability of modified polymer, particle size and zeta potential of nanoparticles, cell viability, and transfection activity of vectors were evaluated...
2017: BioImpacts: BI
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