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Oligonucleotides with LNA and targeting of biologically important RNAs
Peter Guterstam and Ülo Langel

Activity of RNA-targeting antisense oligonucleotides increases when introducing LNA monomers, implying that an 18 nucleotides long LNA/2OMe mixmer splice-switching oligonucleotide can be shortened to 12mer and have similar activity and specificity as an 18mer 2OMe oligonucleoyide. Positioning of LNA monomers has to be carefully considered when utilizing the potent LNA monomers in RNA-targeting antisense oligonucleotides.

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A comparison of siRNA activity predictors using advanced regression techniques
Simone Sciabola, Qing Cao, Theresa Johnson, Lingling Shen, Robert Stanton, Xiaoyu Jiang, Simon Xi, Jason Hughes, Daniel Caffrey, Shobha Potluri, Steven Haney, Johnathan Cyr, Jeremy Little

Although considerable progress has been made recently in understanding how gene silencing is mediated by the RNAi pathway, the design of effective sequences is still a challenging task. To tackle the efficacy challenge and further improve accuracy for prediction of siRNA potency, we performed a comparison of advanced regression techniques and new in-house generated descriptors in the generation of siRNA efficiency models.

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miRNAs in Treating Cardiomyopathy
Veenu Aishwarya

The study aims to design antigomirs against miRNAs involved in Cardiomyopathy. Potential miRNAs involved in the down regulation of certain important genes during this disorder have been identified. All reported miRNAs were scanned using an algorithm against these genes. At three step protocol was followed to take care of false positives and false negatives. Further, HL-1 cells (cardiomyocytes) are been transfected by anti-miRNAs for confirmation.

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qPCRas a primary screen in drug discovery
GauravJaggi, Frank Boeckler, Andreas Joerger and Alan Fersht

We report the use of qPCR technique to follow the thermal unfolding of proteins by the binding of the dye SYPRO Orange, and exploit its potential as a robust and high-throughput primary screen for small molecule drug discovery.

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Targeting Inflammatory Cytokines Using Adenoviruses: gene delivery of biological therapies in ovarian cancer
Michael A. Salako, Hagen Kulbe, Iain A. McNeish, Frances R. Balkwill

Constitutive TNF-alpha expression is characteristic of the malignant ovarian surface epithelium. Adenoviral mutants hold great promise as gene therapy vectors but their efficacy is hindered by an inflammatory cascade orchestrated by TNF-alpha. We found that delivering TNF-alpha shRNA to ovarian cancer cells using oncolytic adenoviruses could reduce the inflammatory cascade generated by adenoviruses and also had direct anti-tumour activity on the cancer cells.

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RNA interference in Manduca sexta induced by double-stranded RNA feeding
Isabel Gomez, Alejandra Bravo and Mario Soberon

We used a double-stranded RNA feeding approach to silence cadherin-like gene: a protein reported as receptor in several lepidopteran insects for the Cry toxins synthesized by Bacillus thuringiensis. We analized the protein expression from dsRNA-fed and untreated laravae on western blott. M. sexta larvae that ingested dsRNA directed against cadherin exhibited a dramatic suppression of the protein and are resistant to the effect of the Cry1Ab toxin.

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Heterochromatin structure is induced by siRNA targeting HIV-1 promoter region
K Suzuki1, H Lim1,3, T Ishida2, T Watanabe2, D Cooper1,3, A Kelleher1,3

We transfected siRNA targeting HIV-1 promoter region into a cell line productively infected with HIV-1. ChIP analysis revealed that the RNA duplex induced transcriptional gene silencing and enrichment of Ago1, H3K9me2, and HDAC1 in HIV promoter region to form heterochromatin structure. The data indicates RNA duplex induces the latent phase of HIV infection, since the chromosome formation is very similar to the state of HIV latently infected cell lines

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Efficient downregulation of the lung liquid clearing gammaENaC subunit by RNAi
Nihal Yueksekdag, Marei Drechsel, Christa Schmidt, and Josef Rosenecker

CF is caused by mutations in the gene encoding for CFTR. CFTR functions as chloride channel on the apical membrane of epithelia thereby regulating the transport of chloride and also sodium ions indirectly. It seems that the regulation of ENaC fails due to the mutated CFTR protein. And it is assumed that ENaC plays a role in the pathogenesis of chronic lung disease in CF-patients.

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In Vitro Potency of Chemically Modified siRNAs Against TNF-alpha
Sandra M. Ocampo, Anna Aviño, Santiago Grijalvo, José C. Perales and Ramón Eritja

The execution of succesful RNAi experiments depends upon multiple factors: 1. Design and identification of effective and specific siRNA sites 2. Enhancement of pharmacocinetic properties 3. Delivery of siRNA. Therefore we have designed, prepared and functionality tested a variety of chemical modifications. These have been tested in HeLa cells to ascertain wether they influence RNAi inducing activity. We have chosen tumor necrosis factor (TNF-alpha) as a target.

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Showing Results 91 - 100 of 163
Scientific News
Study Links Deficiency of Cellular Housekeeping Gene with Aggressive Forms of Breast Cancer
Research team studies genes involved in the autophagy process and their roles in cancer, aging, infections, and neurodegenerative diseases.
“Unprecedented Sensitivity and Specificity” in Ovarian Cancer
Study of the use of the Parsortix system as a clinical application in the detection and treatment of ovarian cancer patients.
Study Uncovers Range of Molecular Alterations in Head and Neck Cancers
TCGA tumor genome sequencing analyses offer new insights into the effects of HPV and smoking, and find genomic similarities with other cancers.
Cancer-Causing Virus Blocks Human Immune Response
Epstein-Barr virus shown to outwit the human immune response using microRNAs.
Major Study Links Gene to Drug Resistance in Testicular Cancer
Researchers used a genetic technique called whole-exome sequencing to examine tumour samples.
New Blood Test For Aggressive Bone Cancer
Researchers at the University of East Anglia are developing a simple blood test to diagnose bone cancer thanks to funding from the Big C.
NIH Researchers Tackle Thorny Side of Gene Therapy
Pre-clinical studies in mice reveal ways to reduce cancer risk with modified treatment.
Tumor Suppressor Protein Plays Key Role In Maintaining Immune Balance
St. Jude Children’s Research Hospital scientists show that the PTEN tumor suppressor protein is essential for proper regulatory T cell function; discovery offers new focus for improving treatment of autoimmune diseases.
GRP78 Protein Possible Universal Therapeutic Target
Drug combination including Viagra is effective tool in targeting the protein.
Bad Luck of Random Mutations Plays Predominant Role in Cancer, Study Shows
Statistical modeling links cancer risk with number of stem cell divisions.
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