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Synthetic self-assembling clostridial chimera for modulation of sensory functions.

Ferrari, E. and Gu, C. and Niranjan, D. and Restani, L. and Rasetti-Escargueil, C. and Obara, I. and Geranton, S.M. and Arsenault, J. and Goetze, T.A. and Harper, C.B. and Nguyen, T.H. and Maywood, E. and O'Brien, J. and Schiavo, G. and Wheeler, D.W. and Meunier, F.A. and Hastings, M. and Edwardson, J.M. and Sesardic, D. and Caleo, M. and Hunt, S.P. and Davletov, B. (2013) 'Synthetic self-assembling clostridial chimera for modulation of sensory functions.', Bioconjugate chemistry., 24 (10). pp. 1750-1759.


Clostridial neurotoxins reversibly block neuronal communication for weeks and months. While these proteolytic neurotoxins hold great promise for clinical applications and the investigation of brain function, their paralytic activity at neuromuscular junctions is a stumbling block. To redirect the clostridial activity to neuronal populations other than motor neurons, we used a new self-assembling method to combine the botulinum type A protease with the tetanus binding domain, which natively targets central neurons. The two parts were produced separately and then assembled in a site-specific way using a newly introduced 'protein stapling' technology. Atomic force microscopy imaging revealed dumbbell shaped particles which measure ∼23 nm. The stapled chimera inhibited mechanical hypersensitivity in a rat model of inflammatory pain without causing either flaccid or spastic paralysis. Moreover, the synthetic clostridial molecule was able to block neuronal activity in a defined area of visual cortex. Overall, we provide the first evidence that the protein stapling technology allows assembly of distinct proteins yielding new biomedical properties.

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Record Created:04 May 2016 15:21
Last Modified:04 May 2016 15:41

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