ORGANS-ON-CHIPS AS A PLATFORM FOR EPIGENETICS DISCOVERY

    公开(公告)号:US20240299932A1

    公开(公告)日:2024-09-12

    申请号:US18659536

    申请日:2024-05-09

    申请人: EMULATE, INC.

    摘要: The present invention relates to microfluidic fluidic devices, methods and systems for use in identifying epigenetic signatures in a range of sample types, e.g., cells established on a “chip” (including but not limited to single cell samples, cell populations, cell layers and whole tissues, such as a biopsy), immune cells, cfDNA, exosomes, and the like. More specifically, in some embodiments, a microfluidic chip containing a sample is contacted with a test compound (e.g. DNA altering test compound, an RNA expression altering test compound, etc.) for use in providing a diagnostic epigenetic signature for that type of sample (or cell type) exposed to that specific test compound. In some embodiments, after contact with a test compound, effluent fluids (e.g. fluids exiting the “chip” that contacted the cells) are derived for testing as a “virtual blood draw.” In some embodiments, epigenetic signatures include (but are not limited to) identifying specific combinations of modifications of chromosomes and specific modifications of DNA.

    Detecting Cross-Contamination in Sequencing Data Using Regression Techniques

    公开(公告)号:US20240247306A1

    公开(公告)日:2024-07-25

    申请号:US18627211

    申请日:2024-04-04

    申请人: GRAIL, LLC

    摘要: Cross-contamination of a test sample used to determine cancer is identified using gene sequencing data. Each test sample includes a number of test sequences that may include a single nucleotide polymorphism (SNP) that can be indicative of cancer. The test sequences are be filtered to remove or negate at least some of the SNPs from the test sequences. Negating the test sequences allows more test sequences to be simultaneously analyzed to determine cross-contamination. Cross-contamination is determined by modeling the variant allele frequency for the test sequences as a function of minor allele frequency, contamination level, and background noise. In some cases, the variant allele frequency is based on a probability function including the minor allele frequency. Cross-contamination of the test sample is determined if the determined contamination level is above a threshold and statistically significant.