SYSTEMS AND METHODS FOR ENCAPSULATION AND MULTI-STEP PROCESSING OF BIOLOGICAL SAMPLES

    公开(公告)号:US20240085287A1

    公开(公告)日:2024-03-14

    申请号:US18514235

    申请日:2023-11-20

    CPC classification number: G01N1/4077 B01J13/046 B01J13/206 C12Q1/6806

    Abstract: This invention relates to methods and systems for isolation of species in semi-permeable capsules and processing of encapsulated species through series of steps and/or reactions. To produce capsules, first aqueous two-phase system (ATPS) droplets are generated using microfluidics system. Then the hydrogel shell layer is hardened by inducing polymerization. As exemplified in this invention to achieve concentric ATPS droplet formation density-matched PEGDA and Dextran polymer solutions can be used. Once a capsule is formed, its composition can be changed by adding new reagents or replacing out old ones (e.g. by resuspending capsules in desired aqueous solution). The hydrogel shell of semi-permeable capsules can be dissolved at selected step during multi-step procedures to release the encapsulated species. This invention exemplifies isolation of individual cells within capsules and using the encapsulated cells for genotypic and phenotypic analysis. This invention also exemplifies use of capsules in multi-step procedures to perform complex biological reactions.

    Method for Generating Solid Capsules
    3.
    发明公开

    公开(公告)号:US20240050914A1

    公开(公告)日:2024-02-15

    申请号:US18278033

    申请日:2022-02-21

    Applicant: Microcaps AG

    Inventor: Kaj Pletscher

    CPC classification number: B01J13/043 B01J13/206

    Abstract: A method for generating capsules includes: a. providing in a first chamber a dispersed phase, the dispersed phase including a solution including a first solvent and a matrix-forming agent, the matrix-forming agent is a solid in its pure state and the first solvent and the matrix-forming agent are configured such that the matrix-forming agent is soluble in the first solvent; and b. providing in a second chamber a continuous phase, the continuous phase including a second solvent. The first and second chambers are fluidic connected by channel(s). The method further includes: c. guiding the dispersed phase from the first chamber through the channel(s) into the second chamber to form an emulsion or a dispersion including a plurality of droplets of the dispersed phase, in the continuous phase; and d. removing the first solvent from the droplets of the dispersed phase and solidifying the matrix-forming agent to form a capsule.

    SOLVENT EXTRACTION FROM BIODEGRADABLE MICROPARTICLES

    公开(公告)号:US20160128942A1

    公开(公告)日:2016-05-12

    申请号:US14974201

    申请日:2015-12-18

    Abstract: Embodiments may include a method for reducing a solvent concentration in a plurality of microparticles. The method may involve contacting a mixture including the plurality of microparticles and the solvent with water to form an aqueous suspension. A first portion of the solvent may dissolve into the water of the aqueous suspension to reduce the solvent concentration in the plurality of microparticles from a first solvent concentration in the mixture to a second solvent concentration in the aqueous suspension. The method may also include transferring the aqueous suspension to a concentration unit that may further reduce the solvent concentration from the second solvent concentration to a third solvent concentration. The method may further include transferring a microparticle concentrate with the third solvent concentration to a washing unit to form an amalgam of washed microparticles with a fourth solvent concentration. The method may also include drying the amalgam of washed microparticles.

    METHOD OF ENCAPSULATION AND IMMOBILIZATION
    10.
    发明申请
    METHOD OF ENCAPSULATION AND IMMOBILIZATION 审中-公开
    封装和固定方法

    公开(公告)号:US20150336066A1

    公开(公告)日:2015-11-26

    申请号:US14819822

    申请日:2015-08-06

    Abstract: A method for encapsulating a material, the steps include choosing a material to encapsulate; placing the material into a material solvent to form a material solution; forming a primary emulsion of the material solution in an immiscible liquid medium that is immiscible with the material solvent, wherein the material solution is the disperse phase and the immiscible liquid medium is the continuous phase of the primary emulsion, wherein the immiscible liquid medium contains an encapsulating agent dissolved therein, the encapsulating agent capable of being crosslinked, polymerized, gelled, hardened or solidified; adding the primary emulsion as droplets into a crosslinking medium, wherein the crosslinking medium is immiscible with the continuous phase immiscible liquid medium of the primary emulsion, and thereafter activating the crosslinking, polymerizing, gelling, hardening or solidifying of the encapsulating agent to envelope the material in a crosslinked, polymerized, gelled, hardened or solidified matrix forming the droplets into beads.

    Abstract translation: 一种封装材料的方法,所述步骤包括选择要封装的材料; 将材料放入材料溶剂中以形成材料溶液; 在与所述材料溶剂不混溶的不混溶液体介质中形成所述材料溶液的主乳液,其中所述材料溶液是分散相,并且所述不混溶液体介质是所述主乳液的连续相,其中所述不混溶液体介质包含 溶解在其中的包封剂,能够交联,聚合,凝胶化,硬化或固化的包封剂; 将初级乳液作为液滴加入交联介质中,其中交联介质与初级乳液的连续相不混溶液体介质不混溶,然后活化封装剂的交联,聚合,凝胶化,固化或固化以包封材料 在交联的,聚合的,胶凝的,硬化的或固化的基质中形成液滴成珠。

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