Method of screening single cells for the production of biologically active agents

• US 8,309,317 B2
• Filed: 04/03/2009
• Issued: 11/13/2012
• Est. Priority Date: 04/05/2008
• Status: Active Grant

• Current Assignee: Single Cell Technology, Inc.
• Original Assignee: Single Cell Technology, Inc.
• Inventors: Chen, Chun-Nan, Bowlby, James O. Jr., Jorgensen, Richard Aleck
• Primary Examiner(s): LAM, ANN Y
• Application Number:
  US12/418,521
• Publication Number:
  US 20100035763A1
• Time in Patent Office: 1,320 Days
• Field of Search: None
• US Class Current: 435/7.92
• CPC Class Codes: C07K 16/2896 against molecules with a "CD"-designation, not provided for elsewhere
• CPC Class Codes: C07K 16/40 against enzymes
• CPC Class Codes: C07K 2317/56 variable (Fv) region, i.e. VH and/or VL
• CPC Class Codes: C12N 15/1065 Preparation or screening of tagged libraries, e.g. tagged microorganisms by STM-mutagenesis, tagged polynucleotides, gene tags
• CPC Class Codes: Y02A 90/10 Information and communication technologies [ICT] supporting adaptation to climate change, e.g. for weather forecasting or climate simulation

Abstract

This invention generally relates to a methods, devices and kits for screening single cells for the production of one or more biologically active agents of interest, such as a protein, nucleic acid, or a protein and the nucleic acid encoding same.

Claims

1. A method of obtaining protein and nucleic acid sequence information about proteins produced from isolated cells of interest, comprising the steps of:

placing a plurality of individual cells in a plurality of individual wells, wherein each cell produces at least one protein of interest;

contacting said at least one protein of interest in the wells with a first surface comprising at least one protein binding agent, which selectively binds at least one of the proteins of interest and which first surface comprises addressable regions that are relatable to the individual wells;

determining one or more properties of said one or more proteins of interest and relating the one or more properties to a particular addressed region of the first surface thereby identifying a well of particular interest;

lysing the cells in the wells;

hybridizing nucleic acids from the lysed cells with oligonucleotide probes comprising tags bound to a second surface, wherein the second surface comprises regions relatable to the individual wells and wherein the tags in each region are different;

converting the nucleic acids into copy nucleic acids that comprise the tags specific to the regions on the second surface;

pooling the tagged copy nucleic acids;

sequencing the tagged copy nucleic acids; and

utilizing the tags to associate the copy nucleic acid sequences to a particular well, which associates the copy nucleic acid sequences with properties of the proteins of interest.

2. The method of claim 1, wherein the nucleic acids from the lysed cells are mRNAs and the copy nucleic acids are cDNAs.

3. The method of claim 2, further comprising identifying one or more cDNA sequences corresponding to a protein of interest and engineering a cell to operatively incorporate the cDNA to produce the protein of interest.

4. The method of claim 1, wherein the cells are antibody producing cells and the protein of interest is an antibody.

5. The method of claim 4, wherein said antibody producing cells are selected from the group consisting of lymphocytes from a single organism, lymphocytes from multiple organisms of the same species, or lymphocytes from multiple organisms from multiple species.

6. The method of claim 1, wherein the protein of interest is an enzyme.

7. The method of claim 1, wherein the protein of interest is a substrate for an enzyme.

8. The method of claim 1, wherein said at least one proteinbinding agent bound to the first surface is selected from the group consisting of Protein A, Protein G, Protein L, Protein A/G, or anti-IgG Fc-γ

subclass-specific antibodies.

9. The method of claim 1, wherein 1,000 or more individual cells are placed in a corresponding number of individual wells of a well tray having a well density of 100 or more wells per cm².

10. The method of claim 1, wherein 10,000 or more individual cells are placed in a corresponding number of individual wells and there are a corresponding number of addressed regions on the first and second surfaces;

and wherein said wells are microwells fabricated at a density greater than 100 microwells per cm² and wherein each microwell has a volume between 1 picoliter and 500 nanoliters.

11. The method of claim 1, wherein the protein of interest is an antibody and sequencing the tagged copy nucleic acids comprises obtaining nucleotide sequences of heavy and light chains of the antibody.

12. The method of claim 11, further comprising:

employing said nucleotide sequence to generate metadata about the antibody of interest.

13. The method of claim 12, wherein said metadata comprises binding properties of said antibody of interest based upon said nucleotide sequence.

14. The method of claim 12, wherein said metadata comprises a frequency of representation of said antibody of interest in said cell population based upon the frequency of representation of said nucleotide sequence in said cell population.

15. The method in claim 1, the method further comprising:

after the contacting step, repeating the contacting step with a third surface comprising a protein binding agent to bind additional proteins produced by the cells.

16. The method in claim 1, wherein the ratio of the number of wells containing two or more cells divided by the number of wells containing a single cell is less than 1:

5.

17. The method of claim 1, wherein the sequencing is accomplished by ultra-high throughput DNA sequencing technology.

18. A method comprising:

placing a plurality of cells in a plurality of wells;

allowing the cells in the wells to exist under conditions such that the cells produce antibodies;

contacting the antibodies in the wells with a first surface comprising regions relatable to the wells, wherein the first surface comprises an antibody binding agent;

contacting the antibodies bound to the regions on the first surface with one or more antibody binding agents;

determining binding information related to binding of the one or more antibody binding agents to the antibodies on the regions of the first surface;

ysing the cells in the wells;

incorporating a tag in nucleic acid copies of the nucleic acids from the lysed cells wherein each tag is uniquely associated with a single well;

pooling nucleic acid copies from the plurality of wells;

sequencing the pooled nucleic acids using ultra high throughput DNA sequencing technology; and

using the tags to associate nucleotide sequences with wells, which associates nucleotide sequences with binding information from the antibodies.