Synaptojanin 1 Mutation in Parkinson's Disease Brings Further Insight into the Neuropathological Mechanisms
Identifieur interne : 000981 ( Hal/Curation ); précédent : 000980; suivant : 000982Synaptojanin 1 Mutation in Parkinson's Disease Brings Further Insight into the Neuropathological Mechanisms
Auteurs : Valérie Drouet [France] ; Suzanne Lesage [France]Source :
- BioMed Research International [ 2314-6133 ] ; 2014-09-16.
Abstract
Synaptojanin 1 (SYNJ1) is a phosphoinositide phosphatase highly expressed in nerve terminals. Its two phosphatase domains dephosphorylate phosphoinositides present in membranes , while its proline-rich domain directs protein-protein interactions with synaptic components , leading to efficient recycling of synaptic vesicles in neurons. Triplication of SYNJ1 in Down ' s syndrome is responsible for higher level of phosphoinositides , enlarged endosomes , and learning deficits. SYNJ1 downregulation in Alzheimer ' s disease models is protective towards amyloid-beta peptide (Aí µí»½) toxicity. One missense mutation in one of SYNJ1 functional domains was recently incriminated in an autosomal recessive form of early-onset Parkinson ' s disease (PD). In the third decade of life , these patients develop progressive Parkinsonism with bradykinesia , dystonia , and variable atypical symptoms such as cognitive decline , seizures , and eyelid apraxia. The identification of this new gene , together with the fact that most of the known PD proteins play a role in synaptic vesicle recycling and lipid metabolism , points out that synaptic maintenance is a key player in PD pathological mechanisms. Studying PD genes as a network regulating synaptic activity could bring insight into understanding the neuropathological processes of PD and help identify new genes at fault in this devastating disorder .
Url:
DOI: 10.1155/2014/289728
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<front><div type="abstract" xml:lang="en">Synaptojanin 1 (SYNJ1) is a phosphoinositide phosphatase highly expressed in nerve terminals. Its two phosphatase domains dephosphorylate phosphoinositides present in membranes , while its proline-rich domain directs protein-protein interactions with synaptic components , leading to efficient recycling of synaptic vesicles in neurons. Triplication of SYNJ1 in Down ' s syndrome is responsible for higher level of phosphoinositides , enlarged endosomes , and learning deficits. SYNJ1 downregulation in Alzheimer ' s disease models is protective towards amyloid-beta peptide (Aí µí»½) toxicity. One missense mutation in one of SYNJ1 functional domains was recently incriminated in an autosomal recessive form of early-onset Parkinson ' s disease (PD). In the third decade of life , these patients develop progressive Parkinsonism with bradykinesia , dystonia , and variable atypical symptoms such as cognitive decline , seizures , and eyelid apraxia. The identification of this new gene , together with the fact that most of the known PD proteins play a role in synaptic vesicle recycling and lipid metabolism , points out that synaptic maintenance is a key player in PD pathological mechanisms. Studying PD genes as a network regulating synaptic activity could bring insight into understanding the neuropathological processes of PD and help identify new genes at fault in this devastating disorder .</div>
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<abstract xml:lang="en">Synaptojanin 1 (SYNJ1) is a phosphoinositide phosphatase highly expressed in nerve terminals. Its two phosphatase domains dephosphorylate phosphoinositides present in membranes , while its proline-rich domain directs protein-protein interactions with synaptic components , leading to efficient recycling of synaptic vesicles in neurons. Triplication of SYNJ1 in Down ' s syndrome is responsible for higher level of phosphoinositides , enlarged endosomes , and learning deficits. SYNJ1 downregulation in Alzheimer ' s disease models is protective towards amyloid-beta peptide (Aí µí»½) toxicity. One missense mutation in one of SYNJ1 functional domains was recently incriminated in an autosomal recessive form of early-onset Parkinson ' s disease (PD). In the third decade of life , these patients develop progressive Parkinsonism with bradykinesia , dystonia , and variable atypical symptoms such as cognitive decline , seizures , and eyelid apraxia. The identification of this new gene , together with the fact that most of the known PD proteins play a role in synaptic vesicle recycling and lipid metabolism , points out that synaptic maintenance is a key player in PD pathological mechanisms. Studying PD genes as a network regulating synaptic activity could bring insight into understanding the neuropathological processes of PD and help identify new genes at fault in this devastating disorder .</abstract>
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