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Open Access Highly Accessed Methodology article

Neuropeptide delivery to the brain: a von Willebrand factor signal peptide to direct neuropeptide secretion

Marijke WA de Backer, Maike AD Brans, Mieneke CM Luijendijk, Keith M Garner, Dianne MA van den Heuvel, R Jeroen Pasterkamp and Roger AH Adan*

Author Affiliations

Rudolf Magnus Institute of Neuroscience, Department of Neuroscience and Pharmacology, Utrecht University Medical Centre Utrecht, Utrecht, the Netherlands

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BMC Neuroscience 2010, 11:94  doi:10.1186/1471-2202-11-94

Published: 11 August 2010

Abstract

Background

Multiple neuropeptides, sometimes with opposing functions, can be produced from one precursor gene. To study the roles of the different neuropeptides encoded by one large precursor we developed a method to overexpress minigenes and establish local secretion.

Results

We fused the signal peptide from the Von Willebrand Factor (VWF) to a furin site followed by a processed form of the Agouti related protein (AgRP), AgRP83-132 or α-melanocyte stimulating hormone. In vitro, these minigenes were secreted and biologically active. Additionally, the proteins of the minigenes were not transported into projections of primary neurons, thereby ensuring local release. In vivo administration of VWF-AgRP83-132 , using an adeno-associated viral vector as a delivery vehicle, into the paraventricular hypothalamus increased body weight and food intake of these rats compared to rats which received a control vector.

Conclusions

This study demonstrated that removal of the N-terminal part of full length AgRP and addition of a VWF signal peptide is a successful strategy to deliver neuropeptide minigenes to the brain and establish local neuropeptide secretion.