path(MESH:"Parkinsonian Disorders")
AR-JP is characterized by lack of LBs and alphaSYN aggregates PubMed:14556719
Since inclusion bodies are lacking in most cases of AR-JP, it is possible that the ubiquitination of Synphilin by wildtype Parkin plays a role in their formation, by targeting ubiquitinated Synphilin to these bodies and removing it from the cytosol where it can be toxic PubMed:14556719
Interestingly, with a few exceptions, AR-JP is characterized by a lack of LBs PubMed:14556719
AR-JP is characterized by lack of LBs and alphaSYN aggregates PubMed:14556719
Interestingly, mutation at R42 abrogates the binding of Parkin to the proteasome, suggesting that it can cause AR-JP. PubMed:14556719
Recently discovered mutations in the DJ-1 gene have also been associated with AR-JP (Bonifati et al., 2003). PubMed:14556719
Importantly, the insoluble Pael receptor accumulates in the brains of patients with AR-JP PubMed:14556719
Interestingly, one of the DJ-1 mutations that is associated with AR-JP is a point mutation, L166P. PubMed:14556719
Various deletion and point mutations in the gene have been found in ~50% of patients with AR-JP (known also as Autosomal Recessive Parkinson’s Disease [ARPD]), one of the most common familial forms of PD (Kitada et al., 1998). PubMed:14556719
Interestingly, mutation at R42 abrogates the binding of Parkin to the proteasome, suggesting that it can cause AR-JP. PubMed:14556719
An interesting point is that the mutated Parkin species K161N, which is associated with AR-JP, could still ubiquitinate p38, suggesting that it is not loss of function that underlies the human disease (see above). PubMed:14556719
It is important to note that while mutations in the nonglycosylated 14 kDa form of alphaSYN have been linked to the pathogenesis of PD (see below), to date, they have not been linked with Parkin-associated AR-JP. PubMed:14556719
PSP is an age-associated tauopathy that clinically manifests as parkinsonism with additional motor abnormalities and cognitive dysfunction (Orr et al., 2017), and is neuropathologically defined by accumulation of four-repeat (4R) tau, NFTs, gliosis and neurodegeneration (Flament et al., 1991) PubMed:30126037
Interestingly, with a few exceptions, AR-JP is characterized by a lack of LBs PubMed:14556719
AR-JP is characterized by lack of LBs and alphaSYN aggregates PubMed:14556719
Importantly, the insoluble Pael receptor accumulates in the brains of patients with AR-JP PubMed:14556719
It is important to note that while mutations in the nonglycosylated 14 kDa form of alphaSYN have been linked to the pathogenesis of PD (see below), to date, they have not been linked with Parkin-associated AR-JP. PubMed:14556719
Since inclusion bodies are lacking in most cases of AR-JP, it is possible that the ubiquitination of Synphilin by wildtype Parkin plays a role in their formation, by targeting ubiquitinated Synphilin to these bodies and removing it from the cytosol where it can be toxic PubMed:14556719
An interesting point is that the mutated Parkin species K161N, which is associated with AR-JP, could still ubiquitinate p38, suggesting that it is not loss of function that underlies the human disease (see above). PubMed:14556719
AR-JP is characterized by lack of LBs and alphaSYN aggregates PubMed:14556719
Therefore, patients with AR-JP—who cannot degrade it because of the mutation in the Parkin E3 (see above)—develop neurodegeneration PubMed:14556719
Recently discovered mutations in the DJ-1 gene have also been associated with AR-JP (Bonifati et al., 2003). PubMed:14556719
Interestingly, one of the DJ-1 mutations that is associated with AR-JP is a point mutation, L166P. PubMed:14556719
PSP is an age-associated tauopathy that clinically manifests as parkinsonism with additional motor abnormalities and cognitive dysfunction (Orr et al., 2017), and is neuropathologically defined by accumulation of four-repeat (4R) tau, NFTs, gliosis and neurodegeneration (Flament et al., 1991) PubMed:30126037
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