FXR1 Deletion from Cortical Parvalbumin Interneurons Modifies their Excitatory Synaptic Responses.

Fragile X autosomal homolog 1 (FXR1), a member of the fragile X messenger riboprotein 1 family, has been linked to psychiatric disorders including autism and schizophrenia. Parvalbumin (PV) interneurons play critical roles in cortical processing, and have been implicated in FXR1-linked mental illnesses. Targeted deletion of FXR1 from PV interneurons in mice has been shown to alter cortical excitability and elicit schizophrenia-like behavior.

Basic Science and Pathogenesis.

Background: This study was to elucidate the impact of blast-induced neurotrauma (BINT) on phosphoproteome networks and cognition in a genetically heterogeneous population of mice (rTg4510) with the human tau P301L mutation linked to Alzheimer's disease-related dementia (ADRD) including frontotemporal dementia.

Method: Mild traumatic brain injury was induced in rTg4510 mice exposed to a single low-density blast (LIB) at an upright position. After assessment of cognitive function by the automated-Home Cage Monitoring (aHCM) system, frontal cortex tissue was collected at 40 days post-injury.

Corrigendum: Inhibition of coronavirus HCoV-OC43 by targeting the eIF4F complex.

[This corrects the article DOI: 10.3389/fphar.2022.

Response of the gut microbiome and metabolome to dietary fiber in healthy dogs.

Unlabelled: Dietary fiber confers multiple health benefits originating from the expansion of beneficial gut microbial activity. However, very few studies have established the metabolic consequences of interactions among specific fibers, microbiome composition, and function in either human or representative animal models. In a study design reflective of realistic population dietary variation, fecal metagenomic and metabolomic profiles were analyzed from healthy dogs fed 12 test foods containing different fiber sources and quantities (5-13% as-fed basis).

Design of allosteric modulators that change GPCR G protein subtype selectivity.

G protein-coupled receptors (GPCRs), the largest family of drug targets, can signal through 16 subtypes of Gα proteins. Biased compounds that selectively activate therapy-relevant pathways promise to be safer, more effective medications. The determinants of bias are poorly understood, however, and rationally-designed, G protein-subtype-selective compounds are lacking.