IP Library Granted Patent US 12,404,547
Granted Patent B1
US 12,404,547 · App. 18/936,839 · Granted Sep 2, 2025

Methods and systems for monitoring a recipient of an allograft

Inventors: Robert Woodward (Pleasanton, CA); Marica Grskovic (Burlingame, CA); James Yee (San Mateo, CA); Mitch Nelles (Half Moon Bay, CA); David Hiller (Brisbane, CA)
C12Q1/686C12Q1/6806G16B20/00
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Quick Facts
Patent No.
US 12,404,547
App. No.
18/936,839
Granted
Sep 2, 2025
Kind
B1
Abstract

A method for sequencing can be used to monitor a recipient of an allograft. A sample comprising nucleic acid molecules can be provided from the recipient of the allograft. A plurality of nucleic acid molecules can be isolated from the sample and amplified. The plurality of nucleic acid molecules can be subjected to one or more amplification reactions using a plurality of primers to generate a plurality of DNA molecules. The plurality of primers can target at least 100 independent polymorphisms. The DNA molecules, or derivatives thereof, can be sequenced. The method may not require genotyping of the recipient.

Claims (28)

1. A method for sequencing, comprising:

(a) providing a sample of a subject, wherein said sample comprises a plurality of cell-free nucleic acid molecules, and wherein said subject is a recipient of an allograft;

(b) isolating said plurality of cell-free nucleic acid molecules from said sample;

(c) amplifying said plurality of cell-free nucleic acid molecules to generate a plurality of amplified nucleic acid molecules;

(d) subjecting said plurality of amplified nucleic acid molecules, or derivatives thereof, to one or more amplification reactions using a plurality of primers to generate a plurality of deoxyribonucleic acid (“DNA”) molecules, wherein said plurality of primers target at least 100 independent polymorphisms; and

(e) sequencing said plurality of DNA molecules, or derivatives thereof,

wherein genotyping of said subject is not performed.

2. The method of claim 1 , wherein said one or more amplification reactions comprises polymerase chain reaction (PCR).

3. The method of claim 1 , further comprising purifying said plurality of DNA molecules, or derivatives thereof.

4. The method of claim 1 , wherein said sequencing in (e) comprises detecting an optical signal from a probe coupled to a DNA molecule or a derivative thereof of said plurality of DNA molecules or derivatives thereof.

5. The method of claim 1 , wherein said sample is derived from blood.

6. The method of claim 1 , wherein said sample comprises peripheral blood mononuclear cells.

7. The method of claim 1 , wherein said sample is plasma.

8. The method of claim 1 , wherein said plurality of amplified nucleic acid molecules in (d) are amplified using a panel that differentiates between cell-free nucleic acid molecules of said plurality of cell-free nucleic acid molecules.

9. The method of claim 1 , further comprising barcoding said plurality of cell-free nucleic acid molecules prior to (c).

10. The method of claim 1 , wherein said allograft is a kidney, a liver, a lung, a heart, a pancreas, a cornea transplant, a skin transplant, an organ system transplant, a xenotransplant, a bone marrow transplant, a stem cell transplant, or a combination thereof.

11. The method of claim 1 , wherein two or more polymorphisms of said at least 100 independent polymorphisms comprise single nucleotide polymorphisms (SNPs).

12. The method of claim 1 , wherein two or more polymorphisms of said at least 100 independent polymorphisms are homozygous in said subject.

13. The method of claim 1 , further comprising obtaining a second sample from said subject.

14. The method of claim 13 , wherein said second sample comprises peripheral blood mononuclear cells (PBMCs).

15. The method of claim 14 , wherein said second sample comprises a plurality of nucleic acid molecules comprising ribonucleic acid (RNA) molecules isolated from said PBMCs.

16. The method of claim 1 , wherein said sequencing is next generation sequencing.

17. The method of claim 1 , wherein said allograft is obtained from a donor, and wherein genotyping of said donor is not performed.

18. The method of claim 1 , wherein said plurality of primers target at least 105 independent polymorphisms.

19. The method of claim 1 , wherein said plurality of primers target at least 110 independent polymorphisms.

20. The method of claim 1 , wherein said plurality of primers target at least 115 independent polymorphisms.

21. The method of claim 1 , wherein said plurality of primers target at least 120 independent polymorphisms.

22. The method of claim 1 , wherein said plurality of primers target at least 150 independent polymorphisms.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jul 17, 2025
From: WOODWARD, ROBERT; GRSKOVIC, MARICA; YEE, JAMES; NELLES, MITCH; HILLER, DAVID
To: CAREDX, INC.
Reel/Frame 071745/0451 →
Continuity (3)
Continuation 18455456 · Aug 24, 2023
Continuation In Part 14658061 · Mar 13, 2015
Provisional Application 61953582 · Mar 14, 2014
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