35 results about "Biomarker identification" patented technology

The methods provided herein use microarray data for feature selection and then use selected targets to generate industry standard qPCR arrays with new clinical sample assay data so order to build a classification model. This multi-step method overcomes the disadvantages of traditional biomarker identification.

The present invention is based, at least in part, on the generation of an animal model of pancreatic adenocarcinoma which recapitulates the genetic and histological features of human pancreatic adenocarcinoma, including the initiation, maintenance, and progression of the disease. Accordingly, the present invention provides animal models of cancer, e.g., pancreatic adenocarcinoma, wherein an activating mutation of Kras has been introduced, and any one or more known or unknown tumor suppressor genes or loci, e.g., Ink4a/Arf, Ink4a, Arf, p53, Smad4/Dpc, Lkb1, Brca2, or Mlh1, have been misexpressed, e.g., have been misexpressed leading to decreased expression or non-expression. The animal models of the invention may be used, for example, to identify biomarkers of pancreatic cancer, to identify agents for the treatment or prevention of pancreatic cancer, and to evaluate the effectiveness of potential therapeutic agents.

Methods of utilizing biomarkers to identify patients for treatment or to monitor response to treatment are taught herein. Alterations in levels of gene expression of the biomarkers, particularly in response to Raf kinase inhibition, are measured and identifications or adjustments may be made accordingly.

Methods and apparatus for identifying disease status according to various aspects of the present invention include analyzing the levels of one or more biomarkers. The methods and apparatus may use biomarker data for a condition-positive cohort and a condition-negative cohort and select multiple relevant biomarkers from the plurality of biomarkers. The system may generate a statistical model for determining the disease status according to differences between the biomarker data for the relevant biomarkers of the respective cohorts. The methods and apparatus may also facilitate ascertaining the disease status of an individual by producing a composite score for an individual patient and comparing the patient's composite score to one or more threshold for identifying potential disease status.

Disclosed are systems and methods for predicting patient response to a treatment option. In one embodiment, the image slides from patient tissue samples are divided into patches and morphological patterns correlated with a disease outcome are labeled and given a patch-level score, based on whether the morphological patterns occur only in patients with good outcomes or patients with poor outcomes. A patient-level score can be generated based, at least partly, on the patch-level scores. Patch-level scores can identify regions of interest for targeted biomarker identification.

Methods of utilizing biomarkers to identify patients for treatment or to monitor response to treatment are taught herein. Alterations in levels of gene expression of the biomarkers, particularly in response to FGFR3 inhibition, are measured and identifications or adjustments may be made accordingly.

This invention discloses an unexpected discovery that plasmacytoid dendritic cells (pDCs) may be segregated into immunogenic or tolerogenic species based on novel biomarkers discovered herein. Exemplary biomarkers include CD8α⁺β⁺, CD8α⁺β⁻, CD8α⁻β⁻, C1q, and IL-9R. For example, pDCs with CD8α⁺β⁺, CD8α⁺β⁻ are tolerogenic and CD8α⁻β⁻ is immunogenic. Also disclosed are isolated pDCs, compositions comprising the pDCs, methods for isolating the pDCs, methods for treating immune-hyper-reactivity, such as airway hyper-reactivity, food allergy, asthma, and autoimmune disorders, by using compositions containing tolerogenic antigen presenting cells, preferably pDCs disclosed herein. Also disclosed are methods for identifying tolerogenic antigen presenting cells by using one or more novel biomarkers disclosed herein, including RALDH expression, CD8α, CD8βC1qa, C1qc, and IL-9R. Also disclosed are methods for inducing Treg cells by using the pDCs disclosed herein.

Disclosed herein are methods, kits, tests, and systems for detecting, predicting, monitoring, or ruling out preeclampsia in pregnant women. Also provided herein are novel diagnostic markers, methods of data analysis, assay formats, and kits employing such markers to improve one or more characteristics of a test for identifying or ruling out preeclampsia based on biomarkers from patient samples.

There is provided a method for identifying a biomarker, such as a gene signature, associated with a biological parameter A 6-gene signature for non-small cell lung cancer (NSCLC) is also provided, as well as a method of prognosing or classifying a subject with non-small cell lung cancer into a poor survival group or a good survival group, using said gene signature

The present invention relates to systems and methods for identifying a biomarker from associative and knowledge based systems and processes. Particularly, aspects of the present invention are directed to a computer implemented method that includes data mining one or more public sources of biomedical text, scientific abstract, or bioinformatic data using queries to identify database terms associated with one or more predetermined terms, scoring association(s) between each of the identified database terms and the one or more predetermined terms, determining a subset b based on the score of the association(s), developing an interaction network model comprising the database terms in subset b, interactions, and additional database terms using a combination of algorithms in a predetermined order, and identifying candidate biomarkers from the interaction network model based on a ranking of the database terms in subset b and the additional database terms in the interaction network model.

The invention discloses a crude oil density prediction method based on saturated hydrocarbon biomarker parameters, comprising of: collecting crude oil saturated hydrocarbon biomarkers comprising biomarkers of normal paraffin series, terpenoid series, steroid series, and alkyl cyclohexane series for identification and relative quantification; calculating the saturated hydrocarbon parameters of thecrude oil; establishing a fitting formula according to the correlation between the saturated hydrocarbon parameters of the crude oil and the density of ground crude oil; and predicting the density ofthe ground crude oil in a target oil-bearing layer according to the fitting formula. According to the crude oil density prediction method based on the saturated hydrocarbon biomarker parameters, the density of the ground crude oil in the target oil-bearing layer can be predicted through a gas chromatography-mass spectrometry analysis of the saturated hydrocarbon component of the wall core or a small amount of core extract. The crude oil density prediction method based on the saturated hydrocarbon biomarker parameters fits and predicts the segmentations of medium light oil and heavy oil, and has the advantages of being simple to operate, low in cost, high in precision and less in influence factors.

A device (“the ExoTIC device”) for the isolation of extracellular vesicles from an extracellular vesicle-containing sample in which the sample is flowed through a membrane in a flow chamber to capture and purify the extracellular vesicles on the membrane. The extracellular vesicles may be washed and collected and utilized in any one of a number of ways including, but not limited to, identifying biomarkers of a disease, identifying the presence of a biomarker in a patient to determine whether a patient has a disease, and therapeutically treating existing diseases by re-introducing the extracellular vesicles, potentially modified, back into a body.

The present invention relates to a biomarker for the identification of specific exposure to propionaldehyde which is one of volatile organic compounds exposed in the environment, and a method for the identification of specific exposure to propionaldehyde using the same, precisely a biomarker which is up-regulated or down-regulated specifically by propionaldehyde and a method for the identification of specific exposure to propionaldehyde using the biomarker. The biomarker of the present invention is the reacted genes selected by using DNA microarray chip, which can be effectively used for the monitoring and evaluation of propionaldehyde contamination in the environment samples and at the same time as a tool for the investigation of the toxic mechanism induced specifically by propionaldehyde.

The invention provides a depression biomarker identification method based on a non-invasive electroencephalogram signal. The method comprises the following steps: acquiring tested depression marker identification data according to a preset data acquisition rule, wherein the data includes an HDRS-17 score and/or an IMS score, and EEG signals corresponding to the HDRS-17 score and/or the IMS score;designing k rounds of cross inspection, and in each round of cross inspection, dividing depression marker identification data into a training set and a test set; establishing a low-dimensional EEG-HDRS-17 model and/or a low-dimensional EEG-IMS model and a high-dimensional EEG-low-dimensional EEG model according to the training sets; converting the high-dimensional EEG feature vector of the test sets into a low-dimensional EEG feature vector by using the high-dimensional EEG-low-dimensional EEG model, and predicting an HDRS-17 score and/or an IMS score of the test set by using the low-dimensional EEG-HDRS-17 model and/or low-dimensional EEG-IMS model; and comparing the predicted HDRS-17 score with an actually measured HDRS-17 score, and/or comparing the predicted IMS score with an actuallymeasured IMS score, and judging whether the depression biomarker to be tested is identified or not according to a comparison result.

The invention provides a brain function connection biomarker recognition method based on a neighborhood decision rough set, and relates to the two fields of brain science and the neighborhood decision rough set. the neighborhood decision rough set capable of effectively processing continuous and high-noise data is introduced for the first time aiming at the characteristics of continuity and high noise of the brain function connection data to improve the accuracy of brain function connection biomarker recognition; the efficiency of the neighborhood decision rough set for identifying the brain function connection biomarker is ensured by reducing a feature search space and quickly generating equivalence classes, namely, the coarse-grained feature search space of the neighborhood decision rough set is generated by grouping brain function connection features by using feature separability measurement; and the equivalence class of each sample is quickly obtained by using the symmetry of the Hash mapping and the neighborhood relationship. The method can accurately and rapidly obtain brain function connection discrimination characteristics with strong classification capability, and is expected to provide more accurate biomarkers for diagnosis of neurological and psychiatric diseases.

The invention discloses a miRNA biomarker identification method and system based on a stack auto-encoder. The method comprises the following steps: collecting known human complex diseases and associated information of miRNA from a database, and storing the associated information in a matrix form; calculating the similarity between the diseases; calculating the similarity between the miRNAs; constructing a feature vector of the human complex disease-miRNA biomarker pair; building a stack auto-encoder neural network and pre-training neural network parameters; performing fine tuning on the stack auto-encoder neural network by using a labeled complex disease-miRNA sample; and identifying the miRNA biomarker related to the human complex disease based on the trained stack auto-encoder neural network. According to the method, the information of the labeled samples and the information of the unlabeled samples are fully utilized, and the limitation that the information of the unlabeled samples cannot be fully utilized in a traditional machine learning method is overcome.

Optical fingerprints for label-free high-throughput (epi)genomics, transcriptomics, and proteomics profiling of single cells. Vibrational spectroscopy signatures combined with a molecular identification algorithm rooted in machine learning enables identification of nucleic acids and amino acids, and their molecular variations, thereby identifying genetic variation by mapping heterogeneity and identifying low copy-number variants. Additional embodiments include the BOCS algorithm which takes measurements of DNA k-mer content from high-throughput single-molecule Raman spectroscopy measurements and maps them to gene databases for probabilistic determination of genetic biomarkers at low coverages. Starting with a log of measured k-mer content blocks (B1 . . . Bn as shown) and a genetic biomarker database (excerpts from the MEGARes antibiotic resistance database are shown), the blocks are individually aligned to each gene in the database based on content. This alignment consists of finding all match locations for the k-mer block content within a gene via translating through the gene one nucleotide at a time and looking at fragments of length k. For each block, a raw probability can be calculated for each gene based on the number of matches for the k-mer block content within the gene, length of the k-mer block, and length of the gene (calculation shown in the schematic). As more blocks are analyzed, probabilities are compounded and genes in the database are ranked. The gene(s) from which the Raman-analyzed k-mer blocks originate quickly generate the top probabilities and can often be determined in coverages <<1.0, meaning that only a small fraction of the gene blocks need to be analyzed for identification of a specific genetic biomarker.

The invention discloses a biomarker identification method and system based on dynamic network entropy, and the method comprises the following steps: obtaining a functional gene pathway related to a disease and interaction between genes, and generating a gene network pathway; acquiring gene expression data corresponding to different stages of the disease for the genes in the gene network pathway; based on the dynamic network entropy, for different stages of the disease, calculating the pathway entropy of each pathway in the gene network pathways; and performing statistical analysis on the channel entropy of each channel in different stages of the disease to determine a channel with an identification effect on the disease. According to the method, the gene network pathway is constructed, information measurement is carried out on pathways in different stages of the disease by adopting entropy, and the gene pathway biomarkers related to the disease progress can be accurately identified by analyzing the change of the entropy.

The invention relates to a human tumor xenotransplantation model construction method and application thereof. According to the construction method of the humanized tumor xenotransplantation model of the narrative hamster based on the IL2RG gene knockout immunodeficiency, provided by the invention, the personalized humanized narrative hamster tumor xenotransplantation model is successfully established by transplanting tumor cells or tissues of a patient. The method is high in tumor formation rate and short in tumor formation time, and more human-derived tumor samples can be obtained. The constructed human-derived tumor xenotransplantation model retains matrix heterogeneity, histological characteristics, molecular diversity and microenvironment of primary tumors, can be widely applied to the aspects of preclinical drug effect personalized screening evaluation, biomarker identification and the like, and lays a foundation for tumor fundamental research and drug evaluation.