PCR thermal cycler for detecting nuclear radiation lesions

PCR (Polymerase Chain Reaction) Technology in the Detection of Nuclear Radiation-Induced Lesions

PCR (polymerase chain reaction) technology has significant application value in the detection of nuclear radiation-induced lesions. The following are the main application directions and advantages of this technology:

Application Directions

1. Detection of genes related to DNA damage and repair:
   Nuclear radiation can cause DNA damage in cells, such as DNA breaks and base substitutions. PCR technology can detect the expression levels and mutation status of genes related to DNA damage and repair, such as p53, ATM, and BRCA1, thereby assessing the extent of radiation damage and cellular repair capacity.
2. Detection of micro-mutations and microsatellite instability:
   Gene mutations caused by nuclear radiation are typically very small and difficult to detect using conventional methods. PCR combined with specific primers and fluorescent labels can perform highly sensitive detection of micro-mutations, microsatellite instability (MSI), and other abnormalities, aiding in the early detection of radiation-related lesions.
3. Estimation of radiation biological dose:
   By detecting changes in mRNA expression of radiation-sensitive genes via real-time quantitative PCR (qPCR), the biological dose following radiation exposure can be estimated, providing a basis for individualized treatment and health assessment after a nuclear accident.
4. Detection of chromosomal aberrations and gene rearrangements:
   PCR can be used to detect radiation-induced structural variations such as chromosomal breaks, translocations, and gene rearrangements. For example, reverse transcription PCR (RT-PCR) can be used to detect the presence of fusion genes. These changes are commonly observed in radiation-related malignant tumors.
5. Auxiliary detection of pathogen infections:
   Nuclear radiation can lead to a decline in immune function. PCR technology can assist in detecting various viral and bacterial infections that are more likely to occur due to immunosuppression, providing a basis for the diagnosis and treatment of radiation sickness complications.
6. High-throughput screening and molecular typing:
   By combining multiplex PCR with high-throughput sequencing technology, rapid screening and typing of radiation-related molecular abnormalities in a large number of samples can be achieved, improving detection efficiency.

Application Advantages

• High sensitivity: Can detect extremely small amounts of mutated DNA/RNA.
• High specificity: Specific primers ensure amplification of only the target sequence.
• Fast speed: Testing can be completed within hours, suitable for emergency medical needs.
• Quantitative analysis: qPCR enables precise quantification of the number of mutated molecules.