SIMULTANEOUS DETECTION OF BIOMOLECULES IN SINGLE CELLS
The present invention provides methods, immunoassays, kits and devices pertaining to the detection of multiple biomolecules from single cells or other biological entities. It also enables the highly parallel detection of interacting biomolecules from such entities.
1 . A method for the detection of two or more nucleic acids, said method comprising
(a) providing a sample comprising a cell comprising said nucleic acids,
(b) spatially separating said cell in a compartment comprising a moiety which is able to bind derivatives of said nucleic acids,
(c) releasing the nucleic acids from the cell,
(d) generating derivatives of said nucleic acids,
(e) allowing the derivatives of said nucleic acids to bind to the moiety which is able to bind the derivatives of said nucleic acids, and
(f) detecting or identifying the derivatives of the nucleic acids,
wherein said sample comprises at least 10 3 cells,
wherein said moiety is solid-phase particle, and
wherein in each of said cells at least two nucleic acids are detected.
2 - 4 . (canceled)
5 . The method of claim 1 , wherein each of said nucleic acids encodes for a polypeptide which is part of a multimeric protein or enzyme.
6 . The method of claim 5 , wherein said multimeric protein is an immunoglobulin, or a functional fragment thereof.
7 . The method of claim 5 , wherein said nucleic acids are genes encoding the variable heavy and the variable light chain of an immunoglobulin or a functional fragment thereof.
8 . (canceled)
9 . The method of claim 1 , wherein said sample is or is derived from blood, bone marrow, a tumor, a single cellular organism, a prokaryote or a body fluid.
10 . The method of claim 9 , wherein said sample is a sample from a patient, wherein said patient is a healthy patient, an immunized patient, an infected patient or a patient with a disease or disorder.
11 . The method of claim 1 , wherein said cell is a single cell, such as a single B cell.
12 - 14 . (canceled)
15 . The method of claim 1 , wherein said compartment is formed by a cavity, a well, an emulsion, a phase-boundary-system, a hydrophobic spot, a particle, physical forces or chemical cross-linking.
16 . The method of claim 15 , wherein said phase boundaries are realized by a phase separation between water and gas like water droplets in air or water and a liquid like water droplets in oil or water and a solid phase like water droplets in a microtiterplate.
17 . The method of claim 15 , wherein said cavity or said well is a cavity on a microtiterplate, a picotiterplate or a microstructured substrate.
18 . The method of claim 15 , wherein said emulsion is a water-in-oil or an oil-in-water emulsion.
19 . The method of claim 15 , wherein said particle consists of silica, glass, agarose, a polymer, a metal oxide or a composite thereof.
20 . The method of claim 15 , wherein said physical forces are electrostatic forces, electrodynamic forces, dielectrophoretic forces, electromagnetic forces, magnetic, optical, temperature or density effects.
21 . The method of claim 1 , wherein said moiety which is able to bind derivatives of said biomolecules is a bead, a glass slide, a microtiterplate, a picotiterplate, or a lid of any of the foregoing.
22 . The method of claim 1 , wherein step (c) is performed by a change of the chemical or physical conditions.
23 . The method of claim 22 , wherein the change of chemical conditions is a pH change, a change of salt concentrations, the addition of a enzyme, the addition of lytic agents.
24 . The method of claim 22 , wherein the change of physical conditions is heating, freezing, application of electric, magnetic or dielectric fields, sheer or centrifugal forces, mechanical deformation, relaxation, ultrasonic or any physical disruptive effect.
25 . The method of claim 24 , wherein said change of the physical condition is effected in a time dependent manner, such as dissolving of a particle in a solution, the dissolving of a protective shell around the biounit or the induction by an enzyme.
26 . The method of claim 1 , wherein step (d) includes an amplification reaction which leads to the generation of replicates or derivatives of said nucleic acids.
27 . The method of claim 26 , wherein said amplification reaction is a PCR or a RT-PCR, and wherein during said PCR or RT-PCR a first tag is added which enables said replicates or derivatives to bind to the moiety which is able to bind to the derivatives of said biomolecules.
28 . The method of claim 27 , wherein during said PCR or RT-PCR a second tag is added which enables subsequent sequencing of the PCR or RT-PCR product.
29 . The method of claim 1 , wherein step (f) is performed by DNA sequencing.
30 . The method of claim 29 , wherein said DNA sequencing is performed by sequencing the PCR or RT-PCR products sequentially or in parallel.
31 . (canceled)
32 . The method of claim 1 , wherein said nucleic acids bind by hybridization to a solid-phase particle which is able to bind said nucleic acid, wherein said solid-phase particle is used for sequencing in step (f).
33 . (canceled)
34 . The method of claim 1 , wherein the detecting or identification of the biomolecules or their derivatives is performed simultaneously.
35 . The method of claim 1 , wherein said sample comprises at least 10 6 , at least 10 9 or at least 10 12 cells.
36 . The method of claim 35 , wherein the correlation of the presence of said at least two nucleic acids within said cells is statistically analyzed or determined.
37 . (canceled)
38 . A device for performing a method or an immunoassay of claim 1 .
39 . A kit comprising the device and instructions to perform a method or an immunoassay of claim 38 .