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Extended survival of misfolded G85R SOD1-linked ALS mice by transgenic expression of chaperone Hsp110. 2016

Maria Nagy, and Wayne A Fenton, and Di Li, and Krystyna Furtak, and Arthur L Horwich
Howard Hughes Medical Institute, Yale School of Medicine, New Haven, CT 06510; Department of Genetics, Yale School of Medicine, New Haven, CT 06510.

Recent studies have indicated that mammalian cells contain a cytosolic protein disaggregation machinery comprised of Hsc70, DnaJ homologs, and Hsp110 proteins, the last of which acts to accelerate a rate-limiting step of nucleotide exchange of Hsc70. We tested the ability of transgenic overexpression of a Thy1 promoter-driven human Hsp110 protein, HspA4L (Apg1), in neuronal cells of a transgenic G85R SOD1YFP ALS mouse strain to improve survival. Notably, G85R is a mutant version of Cu/Zn superoxide dismutase 1 (SOD1) that is unable to reach native form and that is prone to aggregation, with prominent YFP-fluorescent aggregates observed in the motor neurons of the transgenic mice as early as 1 mo of age. The several-fold overexpression of Hsp110 in motor neurons of these mice was associated with an increased median survival from ∼5.5 to 7.5 mo and increased maximum survival from 6.5 to 12 mo. Improvement of survival was also observed for a G93A mutant SOD1 ALS strain. We conclude that neurodegeneration associated with cytosolic misfolding and aggregation can be ameliorated by overexpression of Hsp110, likely enhancing the function of a cytosolic disaggregation machinery.

UI MeSH Term Description Entries
D008297 Male Males
D008822 Mice, Transgenic Laboratory mice that have been produced from a genetically manipulated EGG or EMBRYO, MAMMALIAN. Transgenic Mice,Founder Mice, Transgenic,Mouse, Founder, Transgenic,Mouse, Transgenic,Mice, Transgenic Founder,Transgenic Founder Mice,Transgenic Mouse
D009046 Motor Neurons Neurons which activate MUSCLE CELLS. Neurons, Motor,Alpha Motorneurons,Motoneurons,Motor Neurons, Alpha,Neurons, Alpha Motor,Alpha Motor Neuron,Alpha Motor Neurons,Alpha Motorneuron,Motoneuron,Motor Neuron,Motor Neuron, Alpha,Motorneuron, Alpha,Motorneurons, Alpha,Neuron, Alpha Motor,Neuron, Motor
D005260 Female Females
D000072105 Superoxide Dismutase-1 A superoxide dismutase (SOD1) that requires copper and zinc ions for its activity to destroy SUPEROXIDE FREE RADICALS within the CYTOPLASM. Mutations in the SOD1 gene are associated with AMYOTROPHIC LATERAL SCLEROSIS-1. Cu-Zn Superoxide Dismutase,Cuprozinc Superoxide Dismutase,SOD-1 Protein,SOD1 Protein,Superoxide Dismutase 1,Cu Zn Superoxide Dismutase,SOD 1 Protein,Superoxide Dismutase, Cu-Zn,Superoxide Dismutase, Cuprozinc
D000690 Amyotrophic Lateral Sclerosis A degenerative disorder affecting upper MOTOR NEURONS in the brain and lower motor neurons in the brain stem and SPINAL CORD. Disease onset is usually after the age of 50 and the process is usually fatal within 3 to 6 years. Clinical manifestations include progressive weakness, atrophy, FASCICULATION, hyperreflexia, DYSARTHRIA, dysphagia, and eventual paralysis of respiratory function. Pathologic features include the replacement of motor neurons with fibrous ASTROCYTES and atrophy of anterior SPINAL NERVE ROOTS and corticospinal tracts. (From Adams et al., Principles of Neurology, 6th ed, pp1089-94) ALS - Amyotrophic Lateral Sclerosis,Lou Gehrig Disease,Motor Neuron Disease, Amyotrophic Lateral Sclerosis,Amyotrophic Lateral Sclerosis With Dementia,Amyotrophic Lateral Sclerosis, Guam Form,Amyotrophic Lateral Sclerosis, Parkinsonism-Dementia Complex of Guam,Amyotrophic Lateral Sclerosis-Parkinsonism-Dementia Complex 1,Charcot Disease,Dementia With Amyotrophic Lateral Sclerosis,Gehrig's Disease,Guam Disease,Guam Form of Amyotrophic Lateral Sclerosis,Lou Gehrig's Disease,Lou-Gehrigs Disease,ALS Amyotrophic Lateral Sclerosis,Amyotrophic Lateral Sclerosis Parkinsonism Dementia Complex 1,Amyotrophic Lateral Sclerosis, Parkinsonism Dementia Complex of Guam,Disease, Guam,Disease, Lou-Gehrigs,Gehrig Disease,Gehrigs Disease,Sclerosis, Amyotrophic Lateral
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia
D015996 Survival Rate The proportion of survivors in a group, e.g., of patients, studied and followed over a period, or the proportion of persons in a specified group alive at the beginning of a time interval who survive to the end of the interval. It is often studied using life table methods. Cumulative Survival Rate,Mean Survival Time,Cumulative Survival Rates,Mean Survival Times,Rate, Cumulative Survival,Rate, Survival,Rates, Cumulative Survival,Rates, Survival,Survival Rate, Cumulative,Survival Rates,Survival Rates, Cumulative,Survival Time, Mean,Survival Times, Mean,Time, Mean Survival,Times, Mean Survival
D017510 Protein Folding Processes involved in the formation of TERTIARY PROTEIN STRUCTURE. Protein Folding, Globular,Folding, Globular Protein,Folding, Protein,Foldings, Globular Protein,Foldings, Protein,Globular Protein Folding,Globular Protein Foldings,Protein Foldings,Protein Foldings, Globular
D050957 HSP110 Heat-Shock Proteins A group of eukaryotic high-molecular mass heat-shock proteins that represent a subfamily of HSP70 HEAT-SHOCK PROTEINS. Hsp110 proteins prevent protein aggregation and can maintain denatured proteins in folding-competent states. Heat-Shock Proteins 110,110-kDa Heat Shock Protein,Heat-Shock Protein 110,HSP110 Heat Shock Proteins,Heat Shock Protein 110,Heat Shock Proteins 110,Heat-Shock Proteins, HSP110,Proteins, HSP110 Heat-Shock

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