Abstract
The luteinizing hormone-releasing hormone- Pseudomonas aeruginosa exotoxin 40 (LHRH-PE40), is a candidate target drug associated with elevated LHRH receptor (LHRH-R) expression in malignant tumor tissue. The capability of LHRH-PE40 to recognize LHRH-Rs on a living cell membrane was studied with single molecular recognition force spectroscopy (SMFS) based on atomic force microscopy (AFM). The recognition force of LHRH-PE40/LHRH-R was compared with that of LHRH/LHRH-R by dynamic force spectroscopy. Meanwhile, cell growth inhibition assay and fluorescence imaging were presented as complementary characterization. The results show that LHRH moiety keeps its capability to recognize LHRH-R specifically, which implies that recombinant protein LHRH-PE40 can be a promising target drug.
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