Several spatial coding mechanisms are known to coexist in the hippocampus. However, how are they influenced by various environmental features is still unclear. This study investigated the spatial coding characteristics of hippocampal neurons in mice and rats navigating in different environments. C57BL/6 mice and Long-Evans rats were used in this study. For both mice and rats, most CA1 cells were recorded...

Place cells receive a disparate collection of excitatory and inhibitory currents that provide them with spatially selective discharges and rhythmic activity. This study combined intracellular and extracellular recordings with computational modeling and optogenetic or chemogenetic manipulations to examine the influence of inhibitory and excitatory inputs on CA1 pyramidal cell responses. Homozygous CaMKIIa-Cre...

This study described a unique set of deep layer neurons in posterior parietal cortex (PPC) whose spiking activity is inversely correlated with all principal cells and interneurons in all brain states, but most commonly during the down state of non-REM (NREM) sleep. They identified down state-active (DSA) neurons as deep layer neocortical neurogliaform cells that express ID2 and Nkx2.1. For this study,...

Spike sequences are exemplified by memory replays in sharp-wave ripples (SWRs) and high-frequency oscillations resulting from pyramidal cell-interneuron interactions in the hippocampus. However, the microcircuitry mechanism that enables such flexible spike sequencing remains unknown. This study recorded the membrane potentials of multiple hippocampal CA1 pyramidal cells in mice. For this study, whole-cell...

This dataset includes 3D scanning electron microscopy (SEM) images of a female mouse corpus callosum and MATLAB code for random walker (RaW) segmentations of myelinated axons. The code additionally characterizes inner axonal diameters and fiber orientation dispersion within segments of the intra-axonal spaces and myelin sheaths. In the study, a female 8-week-old C57BL/6 mouse was perfused trans-cardiacally...

The dataset contains data collected from twelve Balb/c mice with metastatic breast cancer (4T1 mammary tumors). Six mice were in the control group and six mice were treated with 5-Fluorouracil (5FU) for metronomic chemotherapy for two weeks. Diffusion MRI (dMRI) and Dynamic Contrast-enhanced MRI (DCE-MRI) images were collected at baseline and post-treatment. Immunohistochemically (IHC) stains and measurements...

Dopamine is a critical modulator of brain circuits that control voluntary movements. However, its influence on the activity of target neurons in vivo remains limited. In this study, two-photon microscopy was used to monitor the activity of direct and indirect-pathway spiny projection neurons (SPNs) simultaneously in the striatum of behaving mice. The striatum mainly consists of two large populations...

This dataset showed that mitovesicles, extracellular vesicles (EVs) of mitochondrial origin, are altered in Down syndrome (DS). Mitochondrial dysfunction is a distinctive feature of aging and neurodegenerative disorders, such as DS and Alzheimer’s disease. For this study, a high-resolution density gradient separation of EVs isolated from murine and human DS and diploid control brains was used. Using...

Fragile X syndrome (FXS) is caused by changes in FMR1 gene, which leads to transcriptional silencing and loss of its protein product fragile X mental retardation protein (FMRP). For this study, proteomic experiments were performed to investigate the de novo translational profile in FXS model mice is altered at steady state and in response to metabotropic glutamate receptor (mGluR) stimulation. Altered...

Arboviruses are caused by a group of viruses spread to people (host) by the bite of infected insects (vector). It is within these hosts that arboviruses replicate and undergo genomic evolution. However, how arboviruses evolve, are transmitted, or cause disease in nature remain unclear. Therefore, this study established a Zika virus (ZIKV) vector-borne transmission system in immunocompromised mice to...