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[Interference of human processed pseudogene and corresponding counter-measures in reverse transcriptase-polymerase
1Department of Thoracic Surgery, the First Affilliated Hospital of Chongqing University of Medical Sciences, Chongqing,400016 P.R.China.
Summary
Researchers developed a method to overcome processed pseudogene interference in reverse transcription polymerase chain reaction (RT-PCR). This technique improves the accuracy of RT-PCR for detecting specific gene sequences like cytokeratin 19.
Area of Science:
- Molecular Biology
- Genetics
Context:
- Reverse transcription polymerase chain reaction (RT-PCR) is a widely used technique for gene expression analysis.
- Processed pseudogenes can interfere with RT-PCR by amplifying unintended sequences, leading to inaccurate results.
Purpose:
- To develop an effective method for identifying and eliminating interference from processed pseudogenes in RT-PCR.
- To improve the reliability of RT-PCR assays, particularly in detecting specific targets like cytokeratin 19 in cancer samples.
Summary:
- The study utilized RT-PCR to amplify cytokeratin 19 cDNA/DNA in human lung squamous cell carcinoma samples.
- Pseudogene interference was detected using genomic DNA and non-reversed transcribed RNA controls.
- Effective elimination of interference was achieved by RNase-free DNase digestion or adjusting annealing temperatures with mismatched primers.
Impact:
- Provides a robust solution to a common technical challenge in molecular biology research.
- Enhances the accuracy and reliability of RT-PCR for gene expression studies and diagnostics.
- Facilitates more precise detection of target molecules in clinical and research settings.