摘要:
The present invention relates to methods for determining the concentration of a free beta-lactam antibiotic in a biological sample. In particular, the present invention relates to methods for measuring a free beta-lactam antibiotic in a biological sample, comprising the steps of: (a) providing at least one class C beta-lactamase, a functional fragment or variant thereof; (b) providing at least one biological sample; (c) contacting said at least one class C beta-lactamase with said at least one biological sample; and (d) determining the concentration of said free beta-lactam antibiotic in said at least one biological sample.
摘要:
The present invention provides methods and systems for the rapid determination of the intact mass of non-covalently associated antibody heavy chains (HC) and light chains (LC) which result from the attachment of drug conjugates to interchain cysteine residues. By analyzing the antibody-drug conjugate (ADC) using native desalting conditions, the intact-bivalent structure of the ADC, which ordinarily would decompose as a consequence of denaturing chromatographic conditions typically used for LCMS, is maintained. The mass of the desalted ADC is subsequently determined using desolvation and ionization ESI-MS conditions. The methods described herein provide for direct measurement of the intact mass of an ADC conjugated at interchain cysteine residues. The methods described herein also provide for the relative quantitation of the individual ADC species.
摘要:
An apparatus for glycan analysis is disclosed. The apparatus includes a plurality of loading wells adapted to receive a plurality of samples; a plurality of capillaries arranged in correspondence with the loading wells, each of the capillaries including a first portion including a stacking gel and a second portion including a resolving gel; and a plurality of eluting wells arranged in correspondence with the capillaries and adapted to receive a portion of the samples having traversed the capillaries.
摘要:
The present invention discloses an assay device (1) for detecting active enzyme in a sample. Said assay device (1) comprises the following components:—(a) a placement region (10) onto which the sample can be placed; (b) a matrix (20) operably connected to said placement region (10) such that the sample when present (such as placed) on said placement region (10) can migrate along said matrix (20); (c) at least one distinct capture location (30) on said matrix (20), wherein each distinct capture location (30) is distanced away from the placement region (10), and wherein the sample can migrate across said distinct capture location (30); (d) capture means (40) being present at or defining each distinct capture location (30), wherein said capture means (40) are capable of binding to said enzyme such that at least a portion of said sample of said enzyme is retained at at least one distinct capture location (30); and (e) selective indication means (50), or at least a component thereof, to provide selective indication of the presence of active enzyme bound to said capture means (40).
摘要:
The invention provides compounds for selectively inhibiting glycosidases, prodrugs of the compounds, and pharmaceutical compositions including the compounds or prodrugs of the compounds. The invention also provides methods of treating diseases and disorders related to deficiency or overexpression of O-GlcNAcase, accumulation or deficiency of O-GlcNAc.
摘要:
The present disclosure provides technologies relating to lysosomal activation. The disclosure provides several strategies for increasing level and/or activity of lysosomal enzyme, and furthermore demonstrates the surprising applicability of such strategies in the treatment and/or prophylaxis of certain proteinopathies. Among other things, the present invention provides methods and compositions for the treatment and/or prophylaxis of proteinopathies other than lysosomal storage diseases through lysosomal activation. In particular, the present disclosure provides methods and compositions for the treatment and/or prophylaxis of neurodegenerative proteinopathies, and in particular those associated with accumulation of α-synuclein. The present disclosure specifically provides methods and compositions for the treatment and/or prophylaxis of Parkinson's disease.
摘要:
The present invention relates to a method for the diagnosis of a lysosomal storage disease (LSD) in a subject which is based on determining the activity of lysosomal enzymes with the help of 4-alkyl umbelliferyl derivatives. The present invention further relates to said 4-alkyl umbelliferyl derivatives for use in the diagnosis of an LSD, and a kit for the diagnosis of an LSD.