RNA-DIRECTED DNA CLEAVAGE BY THE Cas9-crRNA COMPLEX

    公开(公告)号:US20230123754A1

    公开(公告)日:2023-04-20

    申请号:US17857480

    申请日:2022-07-05

    摘要: Isolation or in vitro assembly of the Cas9-crRNA complex of the Streptococcus thermophilus CRISPR3/Cas system and use for cleavage of DNA bearing a nucleotide sequence complementary to the crRNA and a proto-spacer adjacent motif. Methods for site-specific modification of a target DNA molecule using an RNA-guided DNA endonuclease comprising at least one RNA sequence and at least one of an RuvC active site motif and an HNH active site motif; for conversion of Cas9 polypeptide into a nickase cleaving one strand of double-stranded DNA by inactivating one of the active sites (RuvC or HNH) in the polypeptide by at least one point mutation; for assembly of active polypeptide-polyribonucleotides complex in vivo or in vitro; and for re-programming a Cas9-crRNA complex specificity in vitro or using a cassette containing a single repeat-spacer-repeat unit.

    Systems and methods for biomimetic fluid processing

    公开(公告)号:US11566214B2

    公开(公告)日:2023-01-31

    申请号:US16792484

    申请日:2020-02-17

    摘要: Systems and methods generating physiologic models that can produce functional biological substances are provided. In some aspects, a system includes a substrate and a first and second channel formed therein. The channels extend longitudinally and are substantially parallel to each other. A series of apertures extend between the first channel and second channel to create a fluid communication path passing through columns separating the channels that extends further along the longitudinal dimension than other dimensions. The system also includes a first source configured to selectively introduce into the first channel a first biological composition at a first channel flow rate and a second source configured to selectively introduce into the second channel a second biological composition at a second channel flow rate, wherein the first channel flow rate and the second channel flow rate create a differential configured to generate physiological shear rates within a predetermined range in the channels.

    METHOD FOR GENERATING FUNCTIONAL PROTEIN SEQUENCES WITH GENERATIVE ADVERSARIAL NETWORKS

    公开(公告)号:US20220367007A1

    公开(公告)日:2022-11-17

    申请号:US17642836

    申请日:2019-09-10

    摘要: The invention generally relates to the field of protein sequences and of generation of functional protein sequences. More particularly, the invention concerns a method for generating functional protein sequences with generative adversarial networks. The described method for functional sequence generation comprises plurality of steps, each of which is crucial to ensure the high percentage of functional sequences in the final sequence set: selecting a plurality of existing protein sequences to define the approximate sequence space for the later generated synthetic sequences, processing the selected protein sequences, approximating the unknown true distribution of amino acids of the pre-processed sequences using a variation of generative adversarial networks, obtaining protein sequences from the approximated distribution, processing of the obtained protein sequences. The described method provides a resource (e.g. time, cost) efficient way of producing synthetic protein sequences which have a high probability of being functional experimentally.

    AUTOMATED TUMOUR-STROMA INTERFACE ZONE DETECTION FOR ANTI-TUMOUR RESPONSE ASSESSMENT BY IMMUNOGRADIENT INDICATORS

    公开(公告)号:US20220138955A1

    公开(公告)日:2022-05-05

    申请号:US17600614

    申请日:2020-04-09

    IPC分类号: G06T7/13 G06T7/136

    摘要: We present a new method to automatically sample the tumour/stroma interface zone (IZ) from microscopy image analysis data. It first delineates the tumour edge using a set of explicit rules in grid-subsampled tissue areas; then the IZ of controlled width is sampled and ranked by the distance from the edge to compute TIL density profiles across the IZ. From this data, a set of novel Immunogradient indicators are computed to reflect TIL “gravitation” towards the tumour. We applied the method on CD8 immunohistochemistry images of surgically excised breast and colorectal cancers to predict overall patient survival. In both patient cohorts, we found strong and independent prognostic value of the Immunogradient indicators, outperforming methods currently available. We conclude that data-driven, automated, human operator-independent IZ sampling enables precise spatial immune response measurement in the tumour/host interaction frontline for prediction of disease and therapy outcomes.

    Analysis of single-stranded RNA
    49.
    发明授权

    公开(公告)号:US11008605B2

    公开(公告)日:2021-05-18

    申请号:US15559689

    申请日:2016-03-18

    摘要: Provided is a method for modifying a ssRNA at the 3′ end, the method including contacting the strand with a ssRNA 2′-O-methyltransferase in the presence of a co-factor, under conditions which allow for the transfer by the ssRNA 2′-O-methyltransferase of a part of the co-factor onto the 3′ end of the ssRNA to form a modified ssRNA, wherein the ssRNA bears 2′-OH group at 3′ terminal nucleotide and wherein the part of the co-factor transferred includes a reporter group or a functional group.

    System and Method for a Biomimetic Fluid Processing

    公开(公告)号:US20200316597A1

    公开(公告)日:2020-10-08

    申请号:US16904523

    申请日:2020-06-17

    摘要: A system and method are provided for harvesting target biological substances. The system includes a substrate and a first and second channel formed in the substrate. The channels longitudinally extending substantially parallel to each other. A series of gaps extend from the first channel to the second channel to create a fluid communication path passing between a series of columns with the columns being longitudinally separated by a predetermined separation distance. The system also includes a first source configured to selectively introduce into the first channel a first biological composition at a first channel flow rate and a second source configured to selectively introduce into the second channel a second biological composition at a second channel flow rate. The sources are configured to create a differential between the first and second channel flow rates to generate physiological shear rates along the second channel that are bounded within a predetermined range.