# Finding Rare Genetic Changes in Blood Using DNA Fragments

> This patent describes a system and method for detecting uncommon genetic mutations and changes in gene copy numbers from DNA fragments found freely in bodily fluids, like blood.

- **Patent:** US 12735751
- **Original title:** Systems and methods to detect rare mutations and copy number variation
- **Granted:** 2026
- **Status:** Active
- **Times cited:** 0
- **Field:** biotech, diagnostics, software, telecommunications

## What it does

The system and method detect rare mutations and copy number variations (CNVs) in cell-free polynucleotides. First, it involves sample preparation, which means extracting and isolating these DNA fragments from a bodily fluid. Next, these isolated fragments are sequenced using standard techniques. Finally, specialized computer tools, called bioinformatics, analyze the sequencing data to find rare mutations and CNVs by comparing them to a known genetic reference. For example, this could be used to screen for early signs of cancer by looking for tiny amounts of tumor DNA in a blood sample.

## What it does NOT cover

- Does not cover methods that analyze DNA directly from cells, only cell-free polynucleotides.
- Does not cover detection of common genetic variations that are not considered 'rare mutations' or 'copy number variations'.
- Does not cover diagnostic methods that do not involve sequencing the cell-free polynucleotides.
- Does not cover genetic analysis that does not use bioinformatics tools to compare against a reference.
- Does not cover methods that rely solely on protein markers or other non-nucleic acid biomarkers.

## The clever bit

The novelty lies in specifically targeting the detection of *rare* mutations and *copy number variations* from *cell-free polynucleotides* in bodily fluids, and then using bioinformatics, potentially with a disease-specific database, to identify these subtle genetic changes.

## Real-world examples

1. Liquid biopsies for early cancer detection
2. Non-invasive prenatal testing (NIPT)
3. Monitoring cancer recurrence through blood tests
4. Detecting minimal residual disease in cancer patients

## Why it matters

Detecting rare genetic changes early can be crucial for diagnosing diseases like cancer or genetic disorders before symptoms appear. By using cell-free DNA from bodily fluids, this method offers a less invasive way to get genetic information compared to traditional biopsies. This approach can potentially enable earlier intervention and more personalized treatments.

## Frequently asked questions

### What does Finding Rare Genetic Changes in Blood Using DNA Fragments cover?

This patent describes a system and method for detecting uncommon genetic mutations and changes in gene copy numbers from DNA fragments found freely in bodily fluids, like blood.

### When does this patent expire?

This patent is expected to expire on September 15, 2046, when the invention enters the public domain.

### What problem does this patent solve?

Detecting rare genetic changes early can be crucial for diagnosing diseases like cancer or genetic disorders before symptoms appear. By using cell-free DNA from bodily fluids, this method offers a less invasive way to get genetic information compared to traditional biopsies. This approach can potentially enable earlier intervention and more personalized treatments.

### What does this patent NOT cover?

Does not cover methods that analyze DNA directly from cells, only cell-free polynucleotides.

**Full plain-English explainer:** https://patentbrief.org/patent/us/12735751/systems-and-methods-to-detect-rare-mutations-and-copy-number-variation

**Original patent:** https://patents.google.com/patent/US12735751

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_Source: PatentBrief — https://patentbrief.org. Patent facts are from public records; the plain-English explanation is PatentBrief's._