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McLear, J.A; Lebrecht, D; Messer, A; Wolfgang, W.J
The FASEB journal, June 2008, Letnik: 22, Številka: 6Journal Article
Intracellular antibodies (intrabodies) and the chaperone, heat shock protein 70 (Hsp70), have each shown potential as therapeutics for neurodegenerative diseases in vitro and in vivo. Investigating combinational therapy in an established Drosophila model of Huntington's disease (HD), we show that Hsp70 and intrabody actually affect different aspects of the disease. Overexpression of human Hsp70 resulted in improved survival of HD flies to eclosion and prolonged adult life compared with intrabody treatment alone. An additive effect on adult survival was observed when the two therapies were combined. Intrabody was more successful at suppressing neurodegeneration in photoreceptors than was Hsp70. Furthermore, Hsp70 treatment alone did not block aggregation of mutant huntingtin, a process slowed by intrabody. Expression of each is restricted to the nervous system, which implies different neuronal populations respond distinctly to these treatments. Importantly, a role for endogenous Hsp70 in suppression of mutant huntingtin pathology was confirmed by a separate set of genetic studies in which HD flies deficient for Hsp70 showed significantly increased pathology. We conclude that a combinational approach of intrabody with enhanced Hsp70 expression is beneficial in addressing multiple pathologies associated with HD and has potential application for other neurodegenerative disorders.--McLear, J. A., Lebrecht, D., Messer, A., Wolfgang, W. J. Combinational approach of intrabody with enhanced Hsp70 expression addresses multiple pathologies in a fly model of Huntington's disease.
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