Selection of reliable reference genes for gene expression studies in Caenorhabditis elegans exposed to crystals (Cry1Ia36) protein of Bacillus thuringiensis
2019
Wang, Dongwei | Liu, Yong | Zhang, Deyong | He, Qingcong | Tang, Bei | Cheng, Feixue
Quantitative real time PCR (qRT-PCR) is a nucleic acid quantitative technique and is also considered as a validation tool. The Cry1Ia36 protein isolated from Bacillus thuringiensis (Bt) strain YC-10 has high nematicidal activity against nematodes. Caenorhabditis elegans is one of the major model organisms and a readily accessible source of biological material for gene expression studies. To evaluate the expression stability of 12 candidate reference genes of C. elegans for exposing to different concentrations of Cry1Ia36 protein and different treat time, five statistical approaches (the comparative delta-Ct method, BestKeeper, NormFinder, Genorm and RefFinder) were used to evaluate each individual candidate reference gene. The results indicated that cdc-42 and F35G12.2 were the best reference genes for performing reliable gene expression normalization in the impact of Cry1Ia36 protein. In addition, when C. elegans was exposed to Cry1Ia36 protein and other nematicides, avermectin and 5-aminolevulinic acid, cdc-42 was recommended as the most reliable reference genes. Y45F10D.4 was the least stable reference genes in our experimental settings. Therefore, cdc-42 was reliable reference gene for gene expression studies in C. elegans exposed to Cry1Ia36 protein and other nematicides.
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