Hepatic Inactivation of Carnitine Palmitoyltransferase 1a Lowers Apolipoprotein B Containing Lipoproteins in Mice.

Unlabelled: Genome- and epigenome-wide association studies have associated variants and methylation status of carnitine palmitoyltransferase 1a (CPT1a) to reductions in very low-density lipoprotein (VLDL) cholesterol and triglyceride levels. We report significant associations between the presence of SNPs and reductions in plasma cholesterol, as well as positive associations between hepatic Cpt1a expression and plasma cholesterol levels across inbred mouse strains. Mechanistic studies show that both wild type and human apolipoprotein B100 (apoB)-transgenic mice with liver-specific deletion of (LKO) display lower circulating apoB levels consistent with reduced LDL-cholesterol (LDL-C) and LDL particle number.

Isolation and Cryopreservation of Highly Viable Human Peripheral Blood Mononuclear Cells From Whole Blood: A Guide for Beginners.

Peripheral blood mononuclear cells (PBMCs) are commonly used in biomedical research on the immune system and its response to disease and pathogens. This detailed protocol describes the equipment, supplies, and steps for isolating, cryopreserving, and thawing high-quality and highly viable PBMCs from whole blood cells suitable for downstream applications such as flow cytometry and RNA-sequencing. Protocols for processing plasma and buffy coat from the whole blood in parallel and concurrently with PBMCs are also described.

Determinants of Intention to Use HIV Pre-exposure Prophylaxis and Condom Use Among a Sample of Cisgender Female Sex Workers Working Mostly Outdoors in Madrid, Spain.

There is scant knowledge regarding pre-exposure prophylaxis (PrEP) use among female sex workers (FSWs) in Europe. Spain recognized FSWs as a population at high risk of acquiring HIV and granted them subsidized access to PrEP when the medication first became nationally available in 2019. Nevertheless, FSWs represented just 0.

Protocol for preparing monosodium urate crystals for in vitro and in vivo studies in mouse and human cells.

Gout is caused by the deposition of monosodium urate crystals (MSUc) in the joints, triggering a unique inflammatory and metabolic response in macrophages. Here, we present a protocol to generate MSUc for in vitro and in vivo studies in mouse and human cells. We describe steps for dissolving uric acid followed by crystallizing, purifying, evaluating, and analyzing MSUc.

RANK ligand converts the NCoR/HDAC3 co-repressor to a PGC1β- and RNA-dependent co-activator of osteoclast gene expression.

The nuclear receptor co-repressor (NCoR) complex mediates transcriptional repression dependent on histone deacetylation by histone deacetylase 3 (HDAC3) as a component of the complex. Unexpectedly, we found that signaling by the receptor activator of nuclear factor κB (RANK) converts the NCoR/HDAC3 co-repressor complex to a co-activator of AP-1 and NF-κB target genes that are required for mouse osteoclast differentiation. Accordingly, the dominant function of NCoR/HDAC3 complexes in response to RANK signaling is to activate, rather than repress, gene expression.