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Glutamatergic Input from Arcuate Nucleus Kiss1 Neurons to Preoptic Kiss1 Neurons is Required for LH Surge in Female Mice.
Endocrinology
January 2025
Department of Chemical Physiology and Biochemistry, Oregon Health & Science University, Portland, OR, USA.
Hypothalamic kisspeptin (Kiss1) neurons are vital for maintaining fertility in the mammal. In the female rodent, Kiss1 neurons populate the anteroventral periventricular/periventricular nuclei (Kiss1AVPV/PeN) and the arcuate nucleus (Kiss1ARH). Kiss1ARH neurons (a.
View Article and Find Full Text PDFHuntingtin plays an essential role in the adult hippocampus.
Neurobiol Dis
January 2025
Division of Biomedical Sciences, Faculty of Medicine, Memorial University of Newfoundland, St. John's, NL, Canada. Electronic address:
The consequences of non-pathogenic huntingtin (HTT) reduction in the mature brain are of substantial importance as clinical trials for numerous HTT-lowering therapies are underway; many of which are non-selective in that they reduce both mutant and wild type protein variants. In this study, we injected CaMKII-promoted AAV-Cre directly into the hippocampus of adult HTT floxed mice to explore the role of wild-type huntingtin (wtHTT) in adult hippocampal pyramidal neurons and the broader implications of its loss. Our findings reveal that wtHTT depletion results in profound macroscopic morphological abnormalities in hippocampal structure, accompanied by significant reactive gliosis.
View Article and Find Full Text PDFLateral olivocochlear neurons modulate cochlear responses to noise exposure.
Proc Natl Acad Sci U S A
January 2025
Department of Neurobiology, Harvard Medical School, Boston, MA 02115.
The sense of hearing originates in the cochlea, which detects sounds across dynamic sensory environments. Like other peripheral organs, the cochlea is subjected to environmental insults, including loud, damage-inducing sounds. In response to internal and external stimuli, the central nervous system directly modulates cochlear function through olivocochlear neurons (OCNs), which are located in the brainstem and innervate the cochlear sensory epithelium.
View Article and Find Full Text PDFChronic Rapamycin Prevents Electrophysiological and Morphological Alterations Produced by Conditional Pten Deletion in Mouse Cortex.
Cells
January 2025
IDDRC, Jane and Terry Semel Institute for Neuroscience and Human Behavior, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA 90095, USA.
Article Synopsis
- Abnormalities in the mTOR pathway are linked to various brain disorders, affecting synaptic and membrane excitability in neurons.
- Using a mouse model with Pten deletion, the study found that CPNs had increased membrane size and reduced neuronal firing, which could be reversed with rapamycin treatment.
- Chronic rapamycin not only prevented changes in Pten mice but also altered the membrane properties of normal mice, suggesting potential treatments for neurological disorders like epilepsy and autism associated with mTOR dysfunction.
Functional differentiation of human dental pulp stem cells into neuron-like cells exhibiting electrophysiological activity.
Stem Cell Res Ther
January 2025
Department of Cell Biology and Histology, University of the Basque Country UPV/EHU, Leioa, Bizkaia, 48940, Spain.
Background And Aim: Human dental pulp stem cells (hDPSCs) constitute a promising alternative for central nervous system (CNS) cell therapy. Unlike other human stem cells, hDPSCs can be differentiated, without genetic modification, to neural cells that secrete neuroprotective factors. However, a better understanding of their real capacity to give rise to functional neurons and integrate into synaptic networks is still needed.
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