Aspects of the disclosure relate to liquid chromatography (e.g., HPLC) methods which enable high resolution separations of polynucleotides of various lengths, sequences, and/or base compositions in a highly tunable manner. In some embodiments, the disclosure describes liquid chromatographic methods for separating a nucleic acid (e.g., a polyadenylated nucleic acid, such as an mRNA) from a complex mixture by using multiple ion pairing agents in the same mobile phase system. Accordingly, in some embodiments methods described by the disclosure are useful for assessing the quality of pharmaceutical preparations comprising nucleic acids.

Provided is inter alia to an electrophoresis assisted method for purifying a target nucleic acid from a nucleic acid containing sample, comprising (a) binding the target nucleic acid to a solid phase; (b) placing the solid phase with the bound target nucleic acid into a loading chamber of a device, wherein the device comprises a passage which comprises the loading chamber, optionally a liquid permeable separation matrix adjacent to the loading chamber, and a liquid permeable collection matrix and wherein the solid phase with the bound target nucleic acid is present in the loading chamber in a liquid medium comprising at least one water-miscible organic solvent and wherein the target nucleic acid remains bound to the solid phase in said liquid medium; (c) generating an electric field between a cathode and an anode and using a running solution that conducts the electric current, wherein the running solution dilutes the liquid medium comprised in the loading chamber resulting in elution of the bound target nucleic acid, and wherein the eluted target nucleic acid migrates according to its charge in the electric field and is retained by the collection matrix; (d) collecting the purified target nucleic acid. The method is particularly suitable for isolating RNA. The liquid medium delays elution of the RNA from the solid phase, thereby preventing a degradation of the RNA by e.g. RNases.

A self-contained apparatus for isolating nucleic acid, cell lysates and cell suspensions from unprocessed samples apparatus, to be used with an instrument, includes at least one input, and: (i) a macrofluidic component, including a chamber for receiving an unprocessed sample from a collection device and at least one filled liquid purification reagent storage reservoir; and (ii) a microfluidic component in communication with the macrofluidic component through at least one microfluidic element, the microfluidic component further comprising at least one nucleic acid purification matrix; and (iii) at least one interface port to a drive mechanism on the instrument for driving said liquid purification reagent, through the microfluidic element and the nucleic acid purification matrix, wherein the only inputs to the apparatus are through the chamber and the interface port to the drive mechanism.

It is intended to provide highly sensitive and specific, rapid, and convenient method for evaluating a risk of hepatocellular carcinoma. The method for evaluating a risk of hepatocellular carcinoma comprises: (1) amplifying bisulfite-treated DNA derived from a liver tissue of a subject, wherein the DNA comprises a CpG site of an exon region of MGRN1 gene; (2) subjecting the obtained amplification product to ion exchange chromatography; and (3) determining whether or not the DNA is DNA obtained from a subject having a high risk of development of hepatocellular carcinoma on the basis of a peak shape of a detection signal of the chromatography.

The present disclosure relates to nucleic acid extraction and purification methods and devices to accomplish the same.

Described are methods for detecting and quantifying biomolecules such as polynucleotides or polypeptides in an electrophoresis matrix using ion concentration polarization and nanoparticle aggregation.

Provided herein is technology related to processing samples of nucleic acids and particularly, but not exclusively, to methods for enriching samples for small nucleic acids, such as small circulating cell-free DNA.

Apparatuses and methods are described herein for processing polynucleotides in a sealed path environment. The apparatuses include optical sensors to monitor operations and to track material usage for good manufacturing practice.

Apparatuses and methods are described herein for processing polynucleotides in a sealed path environment. The apparatuses include optical sensors to monitor operations and to track material usage for good manufacturing practice.

Methods and devices for isolating or enriching target molecules from a sample are provided herein. In some embodiments, methods and devices further involve detection, analysis and/or sequencing of a target molecule.