摘要:
A method for analyzing the polypeptide content of animal tissue is described. The method includes the steps of (a) providing an animal tissue specimen; (b) depositing one or more portions of a hydrogel mixture including a protease on spatially discrete portions of the animal tissue specimen; (c) allowing sufficient time to pass for animal tissue under the hydrogel mixture to be form a digested mixture of animal tissue and hydrogel mixture; (d) removing the digested mixture from the animal tissue and extracting the polypeptides from the digested mixture to provide an extract; and (e) analyzing the polypeptide content of the extract by mass spectrometry.
摘要:
The present invention relates to a disease diagnosis method, a marker screening method, and a marker using a time-of-flight secondary ion mass spectrometry (TOF-SIMS), and more particularly, to a large intestine cancer diagnosis method, a large intestine cancer marker screening method, and a large intestine cancer marker using a time-of-flight secondary ion mass spectrometry (TOF-SIMS). Specifically, the present invention provides a method diagnosing a disease using a pattern of secondary ion mass (m/z) peaks of biological samples measured using a time-of-flight secondary ion mass spectrometry (TOF-SIMS) as a marker, a marker screening method being a reference judging an existence or non-existence of a disease, and a marker configured of specific secondary ion mass peaks.
摘要:
The present invention provides a method for determining the amino acid polymorphisms of heavy gamma chain of immunoglobulins G by a proteomic approach. This method distinguishes the immunoglobulins of the mother and those of the newborn in a blood sample obtained during the first months of the child's life. The invention also relates to the use of this method in the early diagnosis of vertically transmitted diseases in the neonate. The invention also provides peptides distinctive of G3m and IGHG3 alleles, and a kit comprising said peptides.
摘要:
The present invention relates to a metal oxide nano-composite magnetic material, fabrication method, and method for linkage, enrichment, and isolation of phosphorylated species. The metal oxide nano-composite magnetic material comprises the magnetic iron oxide nanoparticle, a silica layer immobilized onto the magnetic iron oxide nanoparticle and a metal oxide layer coated onto the silica layer. The magnetic iron oxide nanoparticles can be used for absorbing microwave radiation to accelerate the enrichment and linkage for phosphorylated species onto the metal oxide nano-composite magnetic material. Furthermore, the magnetic property of magnetic iron oxide nanoparticles leads to isolation of the metal oxide nano-composite magnetic material-target species conjugates by simply employing an external magnetic field. The specificity of the metal oxide on the surface of the metal oxide nano-composite magnetic material for phosphorylated species also leads to the linkage/enrichment of phosphorylated species with high selectivity.
摘要:
A method for the detection of an early biomarker for assessing a change in renal status in a mammalian subject following a renal event. The method typically includes the steps of (a) providing a body fluid sample obtained from a mammalian subject; (b) analyzing the molecular weight of the proteins in the sample using proteome analysis; and (c) identifying the presence of a protein in the sample selected from the group consisting of a 6.4 kDa protein, a 28.5 kDa protein, a 33 kDa protein, a 44 kDa protein, a 67 kDa protein, and combinations thereof. The presence of one of these proteins can serve as an early biomarker for assessing a change in renal status. The levels of these proteins can be compared to predetermined levels, and thus provide a determination of the subject's renal status. The invention also includes a method of assessing the administration of aprotinin during cardio-pulmonary bypass surgery and provides for methods where the level of the 6.4 kDa biomarker in the subject's urine directs a caregiver's therapeutic decision regarding the intra-operative administration of aprotinin.
摘要:
A method of detection of amino acid sequences and/or identification of proteins and peptides is based on derivatization of peptides or proteins using compounds comprising two or more sulfonyl groups, and subsequent analysis of the derivatized analytes using a mass spectrometer in its negative mode of operation.
摘要:
Here the inventors describe a tumor classifier based on protein expression. Also disclosed is the use of proteomics to construct a highly accurate artificial neural network (ANN)-based classifier for the detection of an individual tumor type, as well as distinguishing between six common tumor types in an unknown primary diagnosis setting. Discriminating sets of proteins are also identified and are used as biomarkers for six carcinomas. A leave-one-out cross validation (LOOCV) method was used to test the ability of the constructed network to predict the single held out sample from each iteration with a maximum predictive accuracy of 87% and an average predictive accuracy of 82% over the range of proteins chosen for its construction.
摘要:
A glycoprotein and/or a glycopeptide which are a test substance is heated in the presence of a pyrazolone derivative, an isoxazolone derivative, a hydantoin derivative, a rhodanine derivative, a maleimide derivative, or the like under a basic condition to cleave and label a post-translational modification group for analysis, thereby enabling analysis of a post-translational modification of a serine residue and/or a threonine residue.
摘要:
In various aspects, the present teachings provide systems, methods, assays and kits for the absolute quantitation of protein expression. In various aspects, the present teachings provide methods of determining the concentration of one or more proteins of interest in one or more samples of interest. In various aspects, the present teachings provide methods of determining the absolute concentration of one or more isoforms of a protein using standard samples of signature protein fragments and parent-daughter ion transition monitoring (PDITM). In various embodiments, the absolute concentration of multiple isoforms of a biomolecule in a sample, multiple proteins in a biological process, a combination of multiple samples, or combinations thereof, can be determined in a multiplex fashion using the present teachings. In various aspects, provided are methods of assessing the response of a biological system to a chemical agent.
摘要:
A method of analyzing a biological sample, for example serum or other blood-based samples, using a MALDI-TOF mass spectrometer instrument is described. The method includes the steps of applying the sample to a sample spot on a MALDI-TOF sample plate and directing more than 20,000 laser shots to the sample at the sample spot and collecting mass-spectral data from the instrument. In some embodiments at least 100,000 laser shots and even 500,000 shots are directed onto the sample. It has been discovered that this approach, referred to as “deep-MALDI”, leads to a reduction in the noise level in the mass spectra and that a significant amount of additional spectral information can be obtained from the sample. Moreover, peaks visible at lower number of shots become better defined and allow for more reliable comparisons between samples.