Studies on the Enzymatic Degradation of Nucleic Acids

1946 ◽  
Keyword(s):  
Nucleic Acids ◽  
Enzymatic Degradation

Nuclease stability of boron-modified nucleic acids: application to label-free mismatch detection

2015 ◽  
Vol 13 (43) ◽  
pp. 10604-10608 ◽  
Author(s):  
Maëva Reverte ◽  
Jean-Jacques Vasseur ◽  
Michael Smietana
Keyword(s):  
Nucleic Acids ◽  
Boronic Acid ◽  
Enzymatic Degradation ◽  
Label Free ◽  
New Class ◽  
Mismatch Detection ◽  
Modified Dna ◽  
Modified Nucleic Acids

Boronic acid modified DNA emerged as a new class of resistant oligonucleotides against enzymatic degradation. This property has been used to develop an enzyme-assisted label free method for mismatch detection.

scholarly journals Inhibition of atherosclerosis-promoting microRNAs via targeted polyelectrolyte complex micelles

2014 ◽  
Vol 2 (46) ◽  
pp. 8142-8153 ◽  
Author(s):  
Cheng-Hsiang Kuo ◽  
Lorraine Leon ◽  
Eun Ji Chung ◽  
Ru-Ting Huang ◽  
Timothy J. Sontag ◽  
...  
Keyword(s):  
Gene Delivery ◽  
Nucleic Acids ◽  
Enzymatic Degradation ◽  
Polyelectrolyte Complex ◽  
Specific Interactions ◽  
Delivery Vehicles ◽  
Complex Micelles ◽  
Gene Delivery Vehicles

Polyelectrolyte complex micelles have great potential as gene delivery vehicles because of their ability to encapsulate charged nucleic acids forming a core by neutralizing their charge, while simultaneously protecting the nucleic acids from non-specific interactions and enzymatic degradation.

An Investigation into the Resistance of Spherical Nucleic Acids against DNA Enzymatic Degradation

2022 ◽  
Author(s):  
Maria-Eleni Kyriazi ◽  
Afaf H. El-Sagheer ◽  
Igor L. Medintz ◽  
Tom Brown ◽  
Antonios G. Kanaras
Keyword(s):  
Nucleic Acids ◽  
Enzymatic Degradation ◽  
Spherical Nucleic Acids

scholarly journals New Applications of Lipid and Polymer-Based Nanoparticles for Nucleic Acids Delivery

Pharmaceutics ◽  
2021 ◽  
Vol 13 (12) ◽  
pp. 2053
Author(s):  
Adelina-Gabriela Niculescu ◽  
Alexandra Cătălina Bîrcă ◽  
Alexandru Mihai Grumezescu
Keyword(s):  
Immune System ◽  
Cell Membrane ◽  
Nucleic Acids ◽  
Targeted Delivery ◽  
Enzymatic Degradation ◽  
Genetic Disorders ◽  
Naked Dna ◽  
Nucleic Acids Delivery ◽  
New Applications ◽  
Novel Delivery Systems

Nucleic acids represent a promising lead for engineering the immune system. However, naked DNA, mRNA, siRNA, and other nucleic acids are prone to enzymatic degradation and face challenges crossing the cell membrane. Therefore, increasing research has been recently focused on developing novel delivery systems that are able to overcome these drawbacks. Particular attention has been drawn to designing lipid and polymer-based nanoparticles that protect nucleic acids and ensure their targeted delivery, controlled release, and enhanced cellular uptake. In this respect, this review aims to present the recent advances in the field, highlighting the possibility of using these nanosystems for therapeutic and prophylactic purposes towards combatting a broad range of infectious, chronic, and genetic disorders.

Electron Microscopy of Nucleic Acids

1974 ◽  
Vol 32 ◽  
pp. 302-303
Author(s):  
Norman Davidson
Keyword(s):  
Electron Microscopy ◽  
Nucleic Acids ◽  
Basic Protein ◽  
Molecular Biologist ◽  
Topological Properties ◽  
Protein Film ◽  
Polynucleotide Chain

The basic protein film technique for mounting nucleic acids for electron microscopy has proven to be a general and powerful tool for the working molecular biologist in characterizing different nucleic acids. It i s possible to measure molecular lengths of duplex and single-stranded DNAs and RNAs. In particular, it is thus possible to as certain whether or not the nucleic acids extracted from a particular source are or are not homogeneous in length. The topological properties of the polynucleotide chain (linear or circular, relaxed or supercoiled circles, interlocked circles, etc. ) can also be as certained.

mRNA localization by Electron microscopic in situ hybridization

1991 ◽  
Vol 49 ◽  
pp. 430-431
Author(s):  
J. A. Pollock ◽  
M. Martone ◽  
T. Deerinck ◽  
M. H. Ellisman
Keyword(s):  
Electron Microscopy ◽  
High Resolution ◽  
Nucleic Acids ◽  
Recombinant Dna ◽  
Light And Electron Microscopy ◽  
Electron Microscopic ◽  
High Voltage Electron Microscopy ◽  
Functional Sites ◽  
Voltage Electron

Localization of specific proteins in cells by both light and electron microscopy has been facilitate by the availability of antibodies that recognize unique features of these proteins. High resolution localization studies conducted over the last 25 years have allowed biologists to study the synthesis, translocation and ultimate functional sites for many important classes of proteins. Recently, recombinant DNA techniques in molecular biology have allowed the production of specific probes for localization of nucleic acids by “in situ” hybridization. The availability of these probes potentially opens a new set of questions to experimental investigation regarding the subcellular distribution of specific DNA's and RNA's. Nucleic acids have a much lower “copy number” per cell than a typical protein, ranging from one copy to perhaps several thousand. Therefore, sensitive, high resolution techniques are required. There are several reasons why Intermediate Voltage Electron Microscopy (IVEM) and High Voltage Electron Microscopy (HVEM) are most useful for localization of nucleic acids in situ.

Nucleic Acid Molecules Prepared by Monolayer Techniques

1972 ◽  
Vol 30 ◽  
pp. 178-179
Author(s):  
Dimitrij Lang
Keyword(s):  
Electron Microscopy ◽  
Standard Deviation ◽  
Nucleic Acid ◽  
Cytochrome C ◽  
Nucleic Acids ◽  
Contour Length ◽  
Sample Standard Deviation ◽  
Molecular Weights ◽  
Length Measurements ◽  
Protein Monolayer

The success of the protein monolayer technique for electron microscopy of individual DNA molecules is based on the prevention of aggregation and orientation of the molecules during drying on specimen grids. DNA adsorbs first to a surface-denatured, insoluble cytochrome c monolayer which is then transferred to grids, without major distortion, by touching. Fig. 1 shows three basic procedures which, modified or not, permit the study of various important properties of nucleic acids, either in concert with other methods or exclusively:1) Molecular weights relative to DNA standards as well as number distributions of molecular weights can be obtained from contour length measurements with a sample standard deviation between 1 and 4%.

Snapshot blotting: The transfer of nucleic acids and nucleoprotein complexes from electrophoresis gels to EM grids

1992 ◽  
Vol 50 (1) ◽  
pp. 762-763
Author(s):  
Stephen D. Jett
Keyword(s):  
Nucleic Acid ◽  
Nucleic Acids ◽  
Nucleic Acid Binding ◽  
Mobility Shift ◽  
Carbon Coated ◽  
Nucleoprotein Complexes ◽  
Mobility Shift Assay ◽  
Protein Nucleic Acid ◽  
Gel Mobility Shift ◽  
Nucleic Acid Interactions

The electrophoresis gel mobility shift assay is a popular method for the study of protein-nucleic acid interactions. The binding of proteins to DNA is characterized by a reduction in the electrophoretic mobility of the nucleic acid. Binding affinity, stoichiometry, and kinetics can be obtained from such assays; however, it is often desirable to image the various species in the gel bands using TEM. Present methods for isolation of nucleoproteins from gel bands are inefficient and often destroy the native structure of the complexes. We have developed a technique, called “snapshot blotting,” by which nucleic acids and nucleoprotein complexes in electrophoresis gels can be electrophoretically transferred directly onto carbon-coated grids for TEM imaging.

Ultrastructural analysis of the spatial distribution of MRNA

1992 ◽  
Vol 50 (1) ◽  
pp. 552-553
Author(s):  
Gary Bassell ◽  
Robert H. Singer
Keyword(s):  
Electron Microscopy ◽  
Spatial Distribution ◽  
In Situ Hybridization ◽  
High Resolution ◽  
Nucleic Acids ◽  
Colloidal Gold ◽  
Dna Probe ◽  
Nucleotide Analogs ◽  
Gold Particles

We have been investigating the spatial distribution of nucleic acids intracellularly using in situ hybridization. The use of non-isotopic nucleotide analogs incorporated into the DNA probe allows the detection of the probe at its site of hybridization within the cell. This approach therefore is compatible with the high resolution available by electron microscopy. Biotinated or digoxigenated probe can be detected by antibodies conjugated to colloidal gold. Because mRNA serves as a template for the probe fragments, the colloidal gold particles are detected as arrays which allow it to be unequivocally distinguished from background.

Sign in / Sign up

Export Citation Format

Share Document