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Genetics and molecular biology are advancing. This has led to researchers using techniques that are fast and cost-effective. One such technology being used across hospitals and research centers worldwide is the high-resolution melting (HRM) analysis. So, what is HRM analysis? And how does it help scientists detect mutations and perform DNA testing? Our comprehensive blog on the high-resolution melting analysis market covers it all. Let’s begin!
High-Resolution Melting Analysis: Overview
HRM analysis is a new and post-PCR analysis technique. It is used to identify genetic variations in nucleic acid sequences. HRM analysis is known for its simple and fast nature. It is based on PCR melting curve techniques. HRM analysis is enabled by the introduction of real-time PCR instrumentation and analysis software, as well as improved double-stranded DNA dyes. The method is capable of discriminating DNA based on various factors, including length, composition, and GC content.
Market Stats
With the growing prevalence of genetic disorders and advancements in precision medicine initiatives, the high-resolution melting analysis market demand continues to rise. The market for HRM analysis stood at USD 320.12 million in 2024. It is expected to account for a CAGR of 2.7% between 2025 and 2034.
Working of High-Resolution Melting Analysis
DNA Amplification Using PCR
The process begins with PCR. The PCR method makes several copies of the DNA segment scientists wish to study. These copies make it easier to detect even small differences in the DNA in the subsequent steps.
Addition of a Fluorescent Dye
The next step involves the addition of a special dye to the copied DNA. The dye sticks only to double-stranded DNA and glows when it’s attached. The glow stays strong for the time period the two DNA strands are together. This gives the machine a clear signal to follow.
Controlled Heating
Next, the sample is subjected to controlled heating. Here, the rise in temperature results in the bond between the two DNA strands becoming weaker. Eventually, separation of the strands takes place. This separation is what scientists refer to as melting.
Monitoring Melting Behavior
The separation of the strands means the dye can’t stick to the DNA. As such, the glow begins to fade. The HRM machine records the melting rate and the temperature at which it happens.
Creating a Melting Curve
A melting curve is then drawn by the machine. The melting curve shows how the fluorescence dropped with the rise in temperature. In essence, it shows how the DNA melted.
Comparing Curves
Even very small changes in DNA can affect the melting of DNA. By comparing melting curves of different samples, scientists are able to assess if there are any differences between them. This allows the identification of mutations or variations with high accuracy.
Comparison Between HRM Analysis and Melt Curve Analysis
There are three ways in which HRM analysis differs from melt curve analysis. They include:
- Chemistry: The dyes used in HRM analysis are brighter and have higher concentrations.
- Instruments: HRM analysis requires instruments for collecting fluorescence data at finer temperature resolution.
- Software: HRM analysis demands more advanced software that makes use of new fluorescent scaling plots and algorithms.
Types of Variations HRM Can Detect
Single Nucleotide Polymorphisms (SNPs)
A SNP happens when only one letter in the DNA sequence changes. Even this change can affect the melting of DNA during HRM testing. The high sensitivity of HRM means it can easily detect these small changes. As such, it’s used in plant breeding and the genetic analysis market.
Insertions and Deletions (Indels)
Indels occur upon the addition or removal of a small part of DNA. This affects the length and stability of the DNA piece, influencing how it melts. HRM is capable of spotting these melting changes clearly.
Gene Mutations
HRM is used to quickly check for mutations associated with diseases such as cancer or inherited disorders. Any change in the DNA sequence can influence the way it melts. This helps researchers identify samples that may need further testing, such as DNA sequencing.
DNA Methylation Differences
Methylation is a chemical tag. It’s responsible for controlling how active a gene is.The melting of methylated and unmethylated DNA is different when subjected to special treatment. HRM products from the high-resolution melting analysis market can detect these differences. That way, scientists can study how genes are turned on or off in conditions related to aging or cancer.
DNA Mixtures
The presence of multiple DNA types in a sample can lead to the melting pattern becoming a mix of signals. HRM is capable of detecting the same. This makes it useful to identify contamination and mixed infections.
AI and HRM Analysis
The AI in healthcare market is changing high-resolution melting analysis. The technology is making HRM faster and more accurate. AI can identify small changes in melting curves that may be difficult for the human eye to detect. This allows for more accurate detection of SNPs and other differences. AI takes away the need to manually check each curve; it can analyze thousands of HRM results in seconds. This saves time for diagnostic labs and research studies. The ability of AI to learn from previous datasets means it becomes better at recognizing patterns over time. Furthermore, automation enabled by AI improves efficiency and allows researchers to focus on more complex tasks.
Conclusion
The high-resolution melting analysis market provides a fast way to study differences in DNA. It helps scientists find mutations and check genetic variations. The quick and accurate nature of HRM has made it an important tool in healthcare and research. With technological improvements, HRM will become even more useful in the years to come.
