Impact of culture medium on the interpretation of qRT-PCR data in HepG2 incubated with lactobacilli

Recently, an increasing number of studies have investigated the mechanism of action of lactobacilli in the treatment of non-alcoholic fatty liver disease. Using four computational tools (NormFinder, geNorm, Delta Ct, and BestKeeper), six potential reference genes (RGs) were analyzed in the human liv...

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Published in:Letters in applied microbiology 2024-05, Vol.77 (6)
Main Authors: Nováková, Mária, Vyletelová, Veronika, Hlubinová, Barbora, Kiňová Sepová, Hana, Pašková, Ľudmila
Format: Article
Language:English
Subjects:
Culture Media - chemistry
Gene Expression Profiling
Hep G2 Cells
Humans
Lactobacillus - genetics
Real-Time Polymerase Chain Reaction
Reference Standards
Sterol Regulatory Element Binding Protein 1 - genetics
Sterol Regulatory Element Binding Protein 1 - metabolism
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Summary:Recently, an increasing number of studies have investigated the mechanism of action of lactobacilli in the treatment of non-alcoholic fatty liver disease. Using four computational tools (NormFinder, geNorm, Delta Ct, and BestKeeper), six potential reference genes (RGs) were analyzed in the human liver cell line HepG2 cultivated 24 h in the presence of two strains of heat-killed lactobacilli, Limosilactobacillus reuteri E and Lactiplantibacillus plantarum KG4, respectively, in different cultivation media [Dulbecco´s Modified Eagle´s Medium (DMEM) high glucose or Roswell Park Memorial Institute (RPMI)]. The analysis revealed that the suitability of RG was similar between the two lactobacilli but quite different between the two media. The commonly used RGs, 18S rRNA and glyceraldehyde-3-phosphate dehydrogenase were the most unstable in DMEM high glucose. Normalization of the mRNA expression of the target gene encoding sterol regulatory element-binding protein 1c (SREBP-1c) to different RGs resulted in different expression profiles. This demonstrates that validation of candidate RGs under specific experimental conditions is crucial for the correct interpretation of quantitative polymerase chain reaction data. In addition, the choice of media has a profound impact on the effect of lactobacilli on lipogenesis at the gene expression level, as shown by the transcription factor SREBP-1c.
ISSN:1472-765X
1472-765X
DOI:10.1093/lambio/ovae050