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Collection and Extraction of Saliva DNA for Next Generation Sequencing
Published on: August 27, 2014
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Overcoming challenges in human saliva gene expression measurements
Patrick Ostheim1, Ales Tichý2, Igor Sirak3
1Bundeswehr Institute of Radiobiology affiliated to the University of Ulm, Neuherbergstr. 11, 80937, Munich, Germany. patrickostheim@bundeswehr.org.
Scientific Reports
|July 9, 2020
Summary
Saliva RNA analysis is challenging due to high bacterial contamination. This study introduces a modified method to isolate human RNA, improving gene expression analysis for disease diagnostics.
Area of Science:
- Biochemistry
- Molecular Biology
- Genomics
Background:
- Saliva is a promising biofluid for disease biomarker discovery due to its accessibility.
- Significant challenges exist, including high bacterial RNA contamination and low human RNA yields.
Purpose of the Study:
- To develop and validate a modified methodology for unbiased human RNA gene expression analysis in saliva.
- To overcome limitations of bacterial contamination and low human RNA quantity in salivary samples.
Main Methods:
- Modification of cDNA synthesis to target human poly(A)+ RNA.
- Introduction of human RNA pre-amplification prior to quantitative reverse transcription PCR (qRT-PCR).
- Validation of linear pre-amplification for gene expression analysis, replacing standard manufacturer criteria.
Main Results:
- The modified method effectively selects human RNA, reducing bacterial interference.
- Pre-amplification increased the number of evaluable samples to 70.6%.
- The optimized protocol enables reliable gene expression analysis of human salivary RNA.
Conclusions:
- The proposed modifications significantly enhance the accuracy and efficiency of human RNA analysis in saliva.
- This approach facilitates the use of salivary RNA biomarkers for disease prediction and diagnosis.
- The methodology addresses key technical hurdles in salivary transcriptomics.
