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Last Updated: 06 August 2022

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Cyclic Adenosine Monophosphate (cAMP)-Dependent Phosphodiesterase Inhibition Promotes Bone Anabolism Through CD8+ T Cell Wnt-10b Production in Mice.

In preclinical models, PDE inhibitors increase bone formation and bone mass, and bone mass, and can be used clinically to treat psoriatic arthritis by targeting inflammatory mediators such as activated T cells. We've previously discovered that in the absence of CD28 co-stimulation, CD8+ T cells are stimulated by CD8+ T cells, they secretly Wnt-10b, a bone anabolic Wnt ligand that promotes bone formation, and bone formation. By contrast, PTX raised only bone resorption in T cell knockout mice, causing net bone loss. WT-deficient mice with WT were reconstructed by T cell-deficient mice with WT, but not Wnt-10b knockout CD8+ T cells, which improved bone formation and reduced bone loss, but not Wnt-10b knockout CD8+ T cells. The results, which include T cell-independent pro-resorptive characteristics of PTX, which occur under T cell-deficient conditions, reveal a crucial role for Wnt-10b production by CD8+ T cells in the bone anabolic reaction to PDE-inhibitors and show competing T cell-independent pro-resorptive characteristics of PTX, which occur under T cell-inhibited conditions. PDE inhibitors' selective targeting of CD8+ T cells by PDE inhibitors may be a useful strategy for bone repair in osteoporotic conditions.

Source link: https://doi.org/10.1002/jbm4.10636


H3K9me3 represses G6PD expression to suppress the pentose phosphate pathway and ROS production to promote human mesothelioma growth.

The role of glucose-6-phosphate dehydrogenase in human cancer is only partially understood. There were no significant differences on tumor cell survival after inhibition of aerobic glycolysis enzyme LDHA and G6PD. Human mesothelioma and colon carcinoma xenograft formation in athymic mice had no effect on human mesothelioma and colon carcinoma xenograft growth. Tissue cell ROS production and the subsequent extrinsic and intrinsic death pathways, mitochondrial reactions, and unfolded protein response in tumor cells were all upped by AG1. In vivo, AG1 inhibited human mesotheliograft growth in a dose-dependent manner.

Source link: https://doi.org/10.1038/s41388-022-02283-0


Glucose availability limits microglial nitric oxide production.

The consumption of NADPH is required for microglial manufacturing of nitric oxide. gil NO production can be rate-limiting because of these reasons. Notably impaired NO production attributed to glucose deprivation was partially reversed by malate, which fuels NADPH production by malate dehydrogenase, and NADPH itself. These results reveal the role of the hexose monophosphate shunt in fueling NO synthesis, as well as the fact that microglial NO production in the brain may be limited at sites of low glucose availability, such as absces or other compartmentalized infections.

Source link: https://doi.org/10.1111/jnc.15522

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions