This invention relates to a method for the purification of nucleic acids, preferably DNA, from biological samples, comprising the steps (a) optional lysis of said sample, (b) optional heat incubation of said sample, (c) enzymatic digestion of non-nucleic acid components in the product of step (a) or (b), (d) heat inactivation of one or more enzyme(s) used in step (c), (e) transfer of the product of step (d) onto a resin capable of retaining non-nucleic acid components, while the nucleic acids pass through the resin, thereby purifying the nucleic acids.

This invention relates to a method for the purification of nucleic acids, preferably DNA, from biological samples, comprising the steps (a) optional lysis of said sample, (b) optional heat incubation of said sample, (c) enzymatic digestion of non-nucleic acid components in the product of step (a) or (b), (d) heat inactivation of one or more enzyme(s) used in step (c), (e) transfer of the product of step (d) onto a resin capable of retaining non-nucleic acid components, while the nucleic acids pass through the resin, thereby purifying the nucleic acids.

A relatively fast, inexpensive, and non-destructive method for separation and isolation of biologically active nanoparticles is described. Methods include the use of solid phase separation medis such as channeled fibers in a hydrophobic interaction chromatography (HIC) protocol to isolate biologically active nanoparticles from other components of a mixture. Biologically active nanoparticles can include natural nanoparticles (e.g., exosomes, lysosomes, virus particles) as well as synthetic nanoparticles (liposomes, genetically modified virus particles, etc.)

An inline filter housing with a biodegradable, hydrophilic material that operates in conjunction with a field sampling apparatus to both concentrate field sampled environmental DNA particles from water samples and to automatically preserve the captured DNA via desiccation, thus avoiding filter membrane transfer steps, chemicals or cold storage preservation requirements. The hydrophilic filter housing is capable of rapidly preserving the field sampled environmental DNA captured on the filter membrane at ambient field temperatures.

The invention relates to a method of diagnosing breast cancer and to the use of biomarkers for the detection and diagnosis of breast cancer.

The present invention provides, among other things, methods for purifying high quality messenger RNA (mRNA) suitable for clinical use, without using any caustic or flammable solvents. The present invention is, in part, based on surprising discovery that mRNA can be successfully purified by selective precipitation and washing without using ethanol while maintaining integrity and high purity of mRNA. Thus, the present invention provides an effective, reliable, and safer method of purifying RNA from large scale manufacturing process therapeutic applications without using any caustic or inflammable solvents.

Methods of LC-MS analysis of oligonucleotides free of ion-pairing reagents are disclosed herein. Historically, ion-pairing reagents have been used for acceptable extraction and chromatography prior to mass spectral analysis. The disclosure herein presents methods free of ion-pairing reagents at each stage, from extraction through the LC-MS endpoint. Also disclosed herein are systems for performing these methods.

The present invention features methods for manufacturing an electrochemical sensor for detecting a diagnostic target oligonucleotide. The methods described herein provide for an electrochemical sensor with a higher level of coverage of the probes on its surface, thus allowing for more sensitive detection of a target oligonucleotide. The methods may feature first mixing disulfide terminated oligonucleotides having a free thiol moiety at the 3′ end with a gold substrate and subsequently introducing to the gold substrate a composition for reducing thiol moieties to cause the oligonucleotides to bind to the surface of the gold substrate. In some embodiments, the method comprises removing excess thiol and oligonucleotides, which may help with non-competitive binding. In some embodiments, the method comprises rinsing the gold substrate with water and drying with nitrogen.

Disclosed herein are methods for preparing compositions containing oligonucleotides. Methods of this disclosure involve subjecting an aqueous solution of a oligonucleotide to ultrafiltration/diafiltration (UF/DF) in order to form a retentate containing the oligonucleotide, where the ultrafiltration/diafiltration (UF/DF) is carried out using an aqueous buffer solution containing one or more salts. Also disclosed herein are oligonucleotide-containing compositions obtained by these methods.

Embodiments of the invention relate to devices for assaying a biomolecule from a plant sample including: a microfluidic cartridge for assaying a biomolecule from a plant sample, including: a top layer; and a bottom layer spaced apart from the top layer in a generally parallel orientation with respect to the top layer, the bottom layer defining a plurality of wells therein that protrude from a surface of the bottom layer; and a filter module for filtering the plant sample, including a filter body defining: an upper portion including an inlet structure forming an inlet channel; and a bottom portion configured to accept and secure a filter membrane. The filter body is configured to accept a microvolume aliquot of the plant sample, the bottom structure includes an outlet structure forming an outlet channel on an outlet side of the filter membrane, and at least one of the plurality of wells includes an assay reagent solution.