TLR4 and infection: Similarly, Garza-González et al. (2008) [42] found no quantitative differences in the TLR4 and TLR5 mRNA levels either, regardless of the presence or absence of H. pylori in gastric epithelial cells biopsies and AGS cells, suggesting that the mRNA levels of both receptors may not be influenced by the infection process or at least not at the time points selected for analysis.