Cloning of neuromedin B and its receptor in the rabbit and generating a polyclonal antibody to the neuromedin B protein

Gene
Ting-Ting GuoZhi-Hai Lei

Abstract

Neuromedin B (NMB) is a highly conserved bombesin-related neuropeptide found in mammals. Neuromedin B (NMB) executes its effect by binding to the cell surface receptor, neuromedin B receptor (NMBR). In this study, we cloned the rabbit NMB and NMBR genes. The similarity and phylogenetic analyses of NMB and NMBR gene sequences were performed. The expression of NMB and NMBR mRNA in the rabbit was investigated using real-time RT-PCR. Our bioinformatic analysis demonstrated that the cloned rabbit NMB precursor cDNA encoded Gly-His-Phe-Met-NH2 amino acids at the C-terminus, and that its receptor possessed typical transmembrane features. The NMB mRNA was highly expressed in the CNS, while the NMBR mRNA was widely expressed in many tissues, with the highest expression in the gastrointestinal tract. The studies on the NMB distribution and function are limited by the lack of a specific antibody to this neuropeptide. In this paper, polyclonal NMB antibody was generated in mice. Western blotting analysis revealed that the prepared antibody could specifically recognize the recombinant and the endogenous NMB proteins. Immunohistochemistry analysis indicated that the NMB protein was localized in the cytoplasm of the pituitary cells. The exist...Continue Reading

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