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https://www.readbyqxmd.com/read/28317836/microscale-symmetrical-electroporator-array-as-a-versatile-molecular-delivery-system
#1
Mengxing Ouyang, Winfield Hill, Jung Hyun Lee, Soojung Claire Hur
Successful developments of new therapeutic strategies often rely on the ability to deliver exogenous molecules into cytosol. We have developed a versatile on-chip vortex-assisted electroporation system, engineered to conduct sequential intracellular delivery of multiple molecules into various cell types at low voltage in a dosage-controlled manner. Micro-patterned planar electrodes permit substantial reduction in operational voltages and seamless integration with an existing microfluidic technology. Equipped with real-time process visualization functionality, the system enables on-chip optimization of electroporation parameters for cells with varying properties...
March 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28303124/identification-and-characterization-of-mirnas-in-response-to-leishmania-donovani-infection-delineation-of-their-roles-in-macrophage-dysfunction
#2
Neeraj Tiwari, Vinod Kumar, Mallikarjuna Rao Gedda, Ashish K Singh, Vijay K Singh, Sreenivas Gannavaram, Surya P Singh, Rakesh K Singh
The outcome of Leishmania infection depends on parasite abilities to evade host immune response and its survival in hostile environment of host macrophages. Despite a wealth of gained crucial information, parasite strategies by which it dampens host macrophage functions remain poorly understood. Micro RNAs (miRNAs) are evolutionarily conserved class of endogenous 22-nucleotide small non-coding RNA gene products, described to participate in the regulation of almost every cellular process investigated so far...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28277007/microrna-mediated-non-viral-direct-conversion-of-embryonic-fibroblasts-to-cardiomyocytes-comparison-of-commercial-and-synthetic-non-viral-vectors
#3
Hyosuk Kim, Dongkyu Kim, Sook Hee Ku, Kwangmeyung Kim, Sun Hwa Kim, Ick Chan Kwon
Technological advances opened up new ways of directing cell fate conversion from one cell lineage to another. The direct cell conversion technique has recently attracted much attention in regenerative medicine to treat devastated organs and tissues, particularly having limited regenerative capacity such as the heart and brain. Unfortunately, its clinical application is severely limited due to a safety concern and immunogenicity of viral vectors, as human gene therapy did in the beginning stages. In this study, we examined the possibility of adopting non-viral vectors to direct cell conversion from mouse embryonic fibroblasts to induced cardiomyocytes (iCM) by transient transfection of four types of chemically synthesized micro-RNA mimics (miRNA-1, 133, 208, and 499)...
February 16, 2017: Journal of Biomaterials Science. Polymer Edition
https://www.readbyqxmd.com/read/28276344/a-new-fluorescence-turn-on-nanobiosensor-for-the-detection-of-micro-rna-21-based-on-a-dna-gold-nanocluster
#4
Morteza Hosseini, Elnaz Ahmadi, Yasaman-Sadat Borghei, Mohammad Reza Ganjali
In this study, DNA/gold nanoclusters (AuNCs) were used to develop an AuNC-based turn-on fluorescence probe for the analysis of mi-RNA-21, which is a potential screening biomarker for cancer detection. AuNCs on a DNA scaffold were prepared through a one-pot wet-chemical route and evaluated by transmission electron microscopy and dynamic light scattering. Experiments revealed that the fluorescence intensity of the DNA-AuNCs showed a gradual increase with the addition of the target species in a concentration range from 1pM to 10 nM...
March 8, 2017: Methods and Applications in Fluorescence
https://www.readbyqxmd.com/read/28275390/dual-role-of-inflammatory-mediators-in-cancer
#5
REVIEW
T G Shrihari
Inflammation is the body's response to noxious stimuli such as infectious, physiological or chemical agents, it releases various inflammatory mediators via immune cells such as neutrophils, macrophages, and lymphocytes. These inflammatory mediators are growth factors, chemokines, and cytokines. Reactive oxygen species (ROS) and nitrogen species (RNS) activate transcriptional factors (NF-KB, STAT-3) and bring about cellular proliferation, genomic instability, angiogenesis, resistance to apoptosis, invasion, and metastasis...
2017: Ecancermedicalscience
https://www.readbyqxmd.com/read/28272473/vesicle-mir-195-derived-from-endothelial-cells-inhibits-expression-of-serotonin-transporter-in-vessel-smooth-muscle-cells
#6
Junzhong Gu, Huiyuan Zhang, Bingyang Ji, Hui Jiang, Tao Zhao, Rongcai Jiang, Zhiren Zhang, Shengjiang Tan, Asif Ahmed, Yuchun Gu
Serotonin or 5-hydroxytryptamine (5-HT) has been shown to be essential in lots of physiological and pathological processes. It is well known that 5-HT and 5-HT transporter (5-HTT) play important roles in the pulmonary artery in pulmonary hypertension. However, little is known about the function of 5-HTT in other arteries. In this study we found that the expression of 5-HTT was elevated in injured carotid arteries and over-expression of 5-HTT induced proliferation of smooth muscle cells (SMCs); however, this phenotype could be reversed by knocking-down of 5-HTT or endothelial cells conditional medium (EC-CM)...
March 8, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28272420/a-millisecond-micro-rna-separation-technique-by-a-hybrid-structure-of-nanopillars-and-nanoslits
#7
Qiong Wu, Noritada Kaji, Takao Yasui, Sakon Rahong, Takeshi Yanagida, Masaki Kanai, Kazuki Nagashima, Manabu Tokeshi, Tomoji Kawai, Yoshinobu Baba
A millisecond micro-RNA separation of a mixture of total RNA and genomic DNA, extracted from cultured HeLa cells, was successfully achieved using a hybrid structure of nanopillars and nanoslits contained inside a microchannel. The nanopillars, 250-nm in diameter and 100-nm in height, were fabricated with a 750-nm space inside the nanoslits, which were 100-nm in height and 25-μm in width; the nanopillars were then applied as a new sieve matrix. This ultra-fast technique for the separation of miRNA can be an effective pretreatment for semiconductor nanopore DNA sequencing, which has an optimum reading speed of 1 base/ms to obtain effective signal-to-noise ratio and discriminate each base by ion or tunneling current during the passage of nucleic acids...
March 8, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28271701/an-update-on-the-biological-markers-of-endometriosis
#8
Razvan Socolov, Demetra Socolov, Allia Sindilar, Ioana Pavaleanu
BACKGROUND: Endometriosis is a disease that affects 7-10% of reproductive-age women. When its diagnosis is delayed, its management becomes more difficult. Both for earlier detection and for therapeutic follow-up, discovering noninvasive biological markers with good specificity for this disease is a promising aspect of its research. We analyzed the recent data in the literature regarding these markers to determine which were worth following. MATERIALS AND METHODS: This literature review focused on medical data reported in the last 6 years (2011-2016)...
March 7, 2017: Minerva Ginecologica
https://www.readbyqxmd.com/read/28259690/the-herbal-medicine-melissa-officinalis-extract-effects-on-gene-expression-of-p53-bcl-2-her2-vegf-a-and-htert-in-human-lung-breast-and-prostate-cancer-cell-lines
#9
Rana Jahanban-Esfahlan, Khaled Seidi, Amir Monfaredan, Vahid Shafie-Irannejad, Mehran Mesgari Abbasi, Ansar Karimian, Bahman Yousefi
INTRODUCTION: Earlier, we verified that Melissa officinalis extract (MOE) elicits potent antiproliferative effects on different human cancer cells. To gain insights into the molecular mechanisms accounting for the cytotoxic effects of MOE, we assessed the expression patterns of several prominent molecules with therapeutic potential in cancer by Quantitative PCR (Q-PCR). METHODS: A549, MCF-7 and PC3 cancer cells were grown in complete RPMI 1640 and seeded in 24 well micro plates...
March 1, 2017: Gene
https://www.readbyqxmd.com/read/28258850/angiogenic-characteristics-of-human-stromal-vascular-fraction-in-ischemic-hindlimb
#10
Enze Jin, Dong-Sik Chae, Mina Son, Sung-Whan Kim
INTRODUCTION: In this study, we sought to characterize the angio-vasculogenic property of human adipose tissue-derived stromal vascular fraction (SVF) and to determine the therapeutic potential of SVF in the context of experimental ischemia. Although human SVF is used for cell therapy, its angiogenic and vasculogenic characteristics have not been fully elucidated. METHODS AND RESULTS: We conducted flow cytometry, microarray, quantitative (q)-PCR, Matrigel tube formation assays and in vivo therapeutic assays using an ischemic hind limb mouse model...
May 1, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28257890/a-novel-role-of-fragile-x-mental-retardation-protein-in-pre-mrna-alternative-splicing-through-rna-binding-protein-14
#11
Lin-Tao Zhou, Shun-Hua Ye, Hai-Xuan Yang, Yong-Ting Zhou, Qi-Hua Zhao, Wei-Wen Sun, Mei-Mei Gao, Yong-Hong Yi, Yue-Sheng Long
Fragile X mental retardation protein (FMRP), an important RNA-binding protein responsible for fragile X syndrome, is involved in posttranscriptional control of gene expression that links with brain development and synaptic functions. Here, we reveal a novel role of FMRP in pre-mRNA alternative splicing, a general event of posttranscriptional regulation. Using co-immunoprecipitation and immunofluorescence assays, we identified that FMRP interacts with an alternative-splicing-associated protein RNA-binding protein 14 (RBM14) in a RNA-dependent fashion, and the two proteins partially colocalize in the nuclei of hippocampal neurons...
February 28, 2017: Neuroscience
https://www.readbyqxmd.com/read/28249169/mir-600-acts-as-a-bimodal-switch-that-regulates-breast-cancer-stem-cell-fate-through-wnt-signaling
#12
Rita El Helou, Guillaume Pinna, Olivier Cabaud, Julien Wicinski, Ricky Bhajun, Laurent Guyon, Claire Rioualen, Pascal Finetti, Abigaelle Gros, Bernard Mari, Pascal Barbry, Francois Bertucci, Ghislain Bidaut, Annick Harel-Bellan, Daniel Birnbaum, Emmanuelle Charafe-Jauffret, Christophe Ginestier
Breast cancer stem cells (bCSCs) have been implicated in tumor progression and therapeutic resistance; however, the molecular mechanisms that define this state are unclear. We have performed two microRNA (miRNA) gain- and loss-of-function screens to identify miRNAs that regulate the choice between bCSC self-renewal and differentiation. We find that micro-RNA (miR)-600 silencing results in bCSC expansion, while its overexpression reduces bCSC self-renewal, leading to decreased in vivo tumorigenicity. miR-600 targets stearoyl desaturase 1 (SCD1), an enzyme required to produce active, lipid-modified WNT proteins...
February 28, 2017: Cell Reports
https://www.readbyqxmd.com/read/28240729/epigenetics-applied-to-epidemiology-investigating-environmental-factors-and-lifestyle-influence-on-human-health
#13
Valeria Motta, Matteo Bonzini, Lotte Grevendonk, Simona Iodice, Valentina Bollati
Epigenetics modifications, that include variations in DNA methylation, histone acetylation and micro RNA (miRNA) expression, co-operate together, influencing genome expression and function, in response to exogenous stimuli or exposures. Thus, epigenetic tools applied to epidemiology are useful in investigating, at the population level, the relationships between exposures to environmental, lifestyle, genetic, socioeconomic risk factors, and the epigenome, and/or specific health outcomes. But the choice of an appropriate study design and of valid epidemiological methods has a key role in determining the achievement of the study...
February 15, 2017: La Medicina del Lavoro
https://www.readbyqxmd.com/read/28235401/expression-of-socs1-and-the-downstream-targets-of-its-putative-tumor-suppressor-functions-in-prostate-cancer
#14
Martin Chevrier, Diwakar Bobbala, Alberto Villalobos-Hernandez, Md Gulam Musawwir Khan, Sheela Ramanathan, Caroline Saucier, Gerardo Ferbeyre, Sameh Geha, Subburaj Ilangumaran
BACKGROUND: Suppressor of cytokine signaling 1 (SOCS1) is considered a tumor suppressor due to frequent epigenetic and micro-RNA-mediated repression of its gene expression in diverse cancers. In prostate cancer (PCa), elevated expression of miR-30d that targets SOCS1 mRNA is associated with increased risk of disease recurrence. SOCS1 can mediate its tumor suppressor functions by diverse mechanisms such as inhibiting the JAK-STAT signaling pathway, promoting the tumor suppressor functions of p53, attenuating MET receptor tyrosine kinase signaling and blocking the oncogenic potential of the cell cycle inhibitor p21(CIP1) (p21)...
February 24, 2017: BMC Cancer
https://www.readbyqxmd.com/read/28222433/high-glucose-induces-mouse-mesangial-cell-overproliferation-via-inhibition-of-hydrogen-sulfide-synthesis-in-a-tlr-4-dependent-manner
#15
Tao Ding, Wei Chen, Juan Li, Jiarong Ding, Xiaobin Mei, Haiyan Hu
BACKGROUND/AIMS: Overproliferation of mesangial cells was believed to play an important role in the progress of diabetic nephropathy, one of the primary complications of diabetes. Hydrogen sulfide (H2S), a well-known and pungent gas with the distinctive smell of rotten eggs, was discovered to play a protective role in diabetic nephropathy. METHODS: MTT assay was used to examine the viability of mesangial cells. Small interfering RNA was used to knock down the expression of TLR4 while specific inhibitor LY294002 to suppress the function of PI3K...
February 22, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28222310/circulating-mirna-associated-with-posttraumatic-stress-disorder-in-a-cohort-of-military-combat-veterans
#16
Christiana G Martin, Hyungsuk Kim, Sijung Yun, Whitney Livingston, Joseph Fetta, Vincent Mysliwiec, Tristin Baxter, Jessica M Gill
Posttraumatic stress disorder (PTSD) affects many returning combat veterans, but underlying biological mechanisms remain unclear. In order to compare circulating micro RNA (miRNA) of combat veterans with and without PTSD, peripheral blood from 24 subjects was collected following deployment, and isolated miRNA was sequenced. PTSD was associated with 8 differentially expressed miRNA. Pathway analysis shows that PTSD is related to the axon guidance and Wnt signaling pathways, which work together to support neuronal development through regulation of growth cones...
January 31, 2017: Psychiatry Research
https://www.readbyqxmd.com/read/28214897/mir-125b-regulates-the-osteogenic-differentiation-of-human-mesenchymal-stem-cells-by-targeting-bmpr1b
#17
Huaqing Wang, Zhao Xie, Tianyong Hou, Zhiqiang Li, Ke Huang, Jicheng Gong, Wei Zhou, Kanglai Tang, Jianzhong Xu, Shiwu Dong
BACKGROUND/AIMS: Osteogenic differentiation of mesenchymal stem cells (MSCs) plays a crucial role in bone regeneration and bone reparation. This complex process is regulated precisely and firmly by specific factors. Recent studies have demonstrated that miR-125b regulates osteogenic differentiation, but little is known about the molecular mechanisms of this regulation. Furthermore, how miR-125b regulates the osteogenic differentiation of MSCs still needs elucidation. METHODS: In the present study, human bone marrow-derived mesenchymal stem cells (hBMSCs) were isolated and induced to osteoblasts with miR-125b inhibition or overexpression...
January 31, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28213328/an-integrated-dual-functional-recognition-amplification-bio-label-for-the-one-step-impedimetric-detection-of-micro-rna-21
#18
Sawsen Azzouzi, Wing Cheung Mak, Kamalodin Kor, Anthony P F Turner, Mounir Ben Ali, Valerio Beni
Alteration in expression of miRNAs has been correlated with different cancer types, tumour stage and response to treatments. In this context, a structurally responsive oligonucleotide-based electrochemical impedimetric biosensor has been developed for the simple and sensitive detection of miRNA-21. A highly specific biotinylated DNA/LNA molecular beacon (MB) probe was conjugated with gold nanoparticles (AuNPs) to create an integrated, dual function bio-label (biotin-MB-AuNPs) for both biorecognition and signal generation...
June 15, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/28209525/stromal-vascular-fraction-shows-robust-wound-healing-through-high-chemotactic-and-epithelialization-property
#19
Dong-Sic Chae, Seongho Han, Mina Son, Sung-Whan Kim
BACKGROUND: Although human stromal vascular fraction (SVF) has been regarded as an attractive stem cell source, its therapeutic mechanism in wound healing has not been fully elucidated. AIMS: In this study, we investigated the molecular characteristics and therapeutic property of SVF for wound healing. METHODS: Microarray data showed that SVF cells are enriched with a higher level of wound healing or epithelium development-related genes and micro RNA...
February 13, 2017: Cytotherapy
https://www.readbyqxmd.com/read/28207326/micro-rna-146a-but-not-irak1-is-associated-with-rheumatoid-arthritis-in-the-tunisian-population
#20
Hana Ben Hassine, Asma Boumiza, Rim Sghiri, Khadija Baccouche, Imen Boussaid, Ahlem Atig, Zahid Shakoor, Elyes Bouajina, Ramzi Zemni
BACKGROUND: Rheumatoid arthritis (RA) is characterized by the production of an array of proinflammatory cytokines through the nuclear factor kappa-light-chain-enhancer of activated B cells (NF-κB) signaling pathway. Interleukin-1 receptor (IL-1R) and Toll-like receptors contain a common cytoplasmic motif the Toll/IL-1R (TIR) homology domain. This motif is required for NF-κB activation. IL-1R-associated kinase 1 (IRAK1) is a key adapter molecule recruited during the signaling cascade of the TIR...
February 2017: Genetic Testing and Molecular Biomarkers
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