Systems and methods for detection of multiple cancer types
The present disclosure provides, among other things, methods for colorectal cancer, breast cancer, lung cancer and/or pancreatic cancer detection (e.g., screening) and compositions related thereto. In various embodiments, the present disclosure provides methods for screening that include analysis of methylation status of one or more methylation biomarkers, and compositions related thereto. In various embodiments, the present disclosure provides methods for detection (e.g., screening) that include detecting (e.g., screening) methylation status of one or more methylation biomarkers in cfDNA, e.g., in ctDNA. In various embodiments, the present disclosure provides methods for screening that include detecting (e.g., screening) methylation status of one or more methylation biomarkers in cfDNA, e.g., in ctDNA, using MSRE-qPCR and/or using massively parallel sequencing (e.g., next-generation sequencing).
1. A method of detecting methylation markers in a human subject suspected of having cancer, the method comprising:
determining a methylation status of each of at least three screening markers identified in a sample obtained from the human subject suspected of having cancer, wherein the sample comprises cell-free DNA that is isolated from blood or plasma of the human subject, wherein a first of the at least three screening markers comprises a methylation locus comprising at least a portion of chr19:12867716-12867820 (SEQ ID NO: 82), a second of the at least three screening markers comprises a methylation locus comprising at least a portion of chr20:48828337-48828448 (SEQ ID NO: 86), and a third of the at least three screening markers comprises a methylation locus comprising at least a portion of chr20:23049354-23049500 (SEQ ID NO: 107.
2. The method of claim 1 , wherein the subject is suspected having at least one of the cancers selected from the group consisting of: (i) colorectal cancer, (ii) breast cancer, (iii) lung cancer, and (iv) pancreatic cancer.
3. The method of claim 1 , wherein each methylation locus comprises at least one CpG dinucleotide.
4. The method of claim 1 , further comprising, determining a methylation status of each of at least three cancer-differentiating markers selected from the DMRs of Table 15,
said at least three cancer-differentiating markers identified in a sample obtained from the subject.
5. The method of claim 1 , further comprising, determining a methylation status of each of at least three cancer-differentiating markers selected from the DMRs of Table 13,
said at least three cancer-differentiating markers identified in a sample obtained from the subject.
6. The method of claim 1 , wherein methylation status is determined using quantitative polymerase chain reaction (qPCR).
7. The method of claim 1 , wherein methylation status is determined using methylation sensitive restriction enzyme quantitative polymerase chain reaction (MSRE-qPCR).
8. The method of claim 1 , wherein methylation status is determined using massively parallel sequencing.
9. The method of claim 1 , wherein each methylation locus is equal to or less than 5000 bp in length.
10. The method of claim 1 , comprising determining the methylation status of each of the one or more screening markers using next generation sequencing (NGS).
11. The method of claim 10 , comprising using one or more oligonucleotide capture baits that enrich for a target region to capture one or more corresponding methylation locus/loci.