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Genetic studies have elucidated critical roles of Piwi proteins in germline development in animals, but whether Piwi is an actual disease gene in human infertility remains unknown. We report germline mutations in human Piwi (Hiwi) in patients with azoospermia that prevent its ubiquitination and degradation. By modeling such mutations in Piwi (Miwi) knockin mice, we demonstrate that the genetic defects...
Atypical antipsychotic drugs, such as clozapine and risperidone, have a high affinity for the serotonin 5-HT2A G protein-coupled receptor (GPCR), the 2AR, which signals via a Gq heterotrimeric G protein. The closely related non-antipsychotic drugs, such as ritanserin and methysergide, also block 2AR function, but they lack comparable neuropsychological effects. Why some but not all 2AR inhibitors...
NMDA receptor-dependent synaptic modifications, such as long-term potentiation (LTP) and long-term depression (LTD), are essential for brain development and function. LTD occurs mainly by the removal of AMPA receptors from the postsynaptic membrane, but the underlying molecular mechanisms remain unclear. Here, we show that activation of caspase-3 via mitochondria is required for LTD and AMPA receptor...
The proper intracellular distribution of mitochondria is assumed to be critical for normal physiology of neuronal cells, but direct evidence for this idea is lacking. Extension or movement of mitochondria into dendritic protrusions correlates with the development and morphological plasticity of spines. Molecular manipulations of dynamin-like GTPases Drp1 and OPA1 that reduce dendritic mitochondria...
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