Transcriptional response of Pseudomonas aeruginosa PAO1 to human host defense peptide LL-37

In this experiment the transcriptional response of the opportunistic human pathogen Pseudomonas aeruginosa towards physiological concentrations of the major human host defense peptide LL-37 was investigated using microarrays. To this aim, three independent cultures of P. aeruginosa PAO1 were grown until mid-log phase in Mueller-Hinton broth and subsequently incubated with either sublethal LL-37 concencentrations (20 µg/ml) or without peptide for 2 h at 37 °C following RNA extraction and microarray analysis.

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