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Transdifferentiation is a complete and stable change in cell identity that serves as an alternative to stem-cell-mediated organ regeneration. In adult mammals, findings of transdifferentiation have been limited to the replenishment of cells lost from preexisting structures, in the presence of a fully developed scaffold and niche1. Here we show that transdifferentiation of hepatocytes in […]
https://vblwp.azureedge.net/wordpress/2017/09/vbl_logo_no_icon.png00Haig Didizianhttps://vblwp.azureedge.net/wordpress/2017/09/vbl_logo_no_icon.pngHaig Didizian2018-01-01 00:00:002018-01-01 00:00:00De novo formation of the biliary system by TGFß-mediated hepatocyte transdifferentiation
Aerobic glycolysis is a phenomenon that in the long term contributes to synaptic formation and growth, is reduced by normal aging, and correlates with amyloid beta deposition. Aerobic glycolysis starts within seconds of neural activity and it is not obvious why energetic efficiency should be compromised precisely when energy demand is highest. Using genetically encoded […]
https://vblwp.azureedge.net/wordpress/2017/09/vbl_logo_no_icon.png00Haig Didizianhttps://vblwp.azureedge.net/wordpress/2017/09/vbl_logo_no_icon.pngHaig Didizian2018-01-01 00:00:002018-01-01 00:00:00Neuronal control of astrocytic respiration through a variant of the Crabtree effect
Sarcopenia, the degenerative loss of skeletal muscle mass, quality and strength, lacks early diagnostic tools and new therapeutic strategies to prevent the frailty-to-disability transition often responsible for the medical institutionalization of elderly individuals. Herein we report that production of the endogenous peptide apelin, induced by muscle contraction, is reduced in an age-dependent manner in humans […]
How our internal state is merged with our visual perception of an impending threat to drive an adaptive behavioural response is not known. Mice respond to visual threats by either freezing or seeking shelter. Here we show that nuclei of the ventral midline thalamus (vMT), the xiphoid nucleus (Xi) and nucleus reuniens (Re), represent crucial […]
Obesity-induced metabolic disease involves functional integration among several organs via circulating factors, but little is known about crosstalk between liver and visceral adipose tissue (VAT)1. In obesity, VAT becomes populated with inflammatory adipose tissue macrophages (ATMs)2,3. In obese humans, there is a close correlation between adipose tissue inflammation and insulin resistance4,5, and in obese mice, […]
Macrophage migration inhibitory factor (MIF) is a non-canonical cytokine that is involved in multiple inflammatory diseases, including atherosclerosis. High MIF expression found in leukocytes which facilitates the initiation and progression of atherosclerosis. However, little is known about biomechanical forces in the induction of MIF in endothelial cells (ECs). Here, we show that laminar shear stress […]
Dysregulated mammalian target of rapamycin (mTOR) promotes cancer, but underlying mechanisms are poorly understood. We describe an mTOR-driven mouse model that displays hepatosteatosis progressing to hepatocellular carcinoma (HCC). Longitudinal proteomic, lipidomics, and metabolomic analyses revealed that hepatic mTORC2 promotes de novo fatty acid and lipid synthesis, leading to steatosis and tumor development. In particular, mTORC2 […]
Sclerostin has traditionally been thought of as a local inhibitor of bone acquisition that antagonizes the profound osteoanabolic capacity of activated Wnt/ß-catenin signaling, but serum sclerostin levels in humans exhibit a correlation with impairments in several metabolic parameters. These data, together with the increased production of sclerostin in mouse models of type 2 diabetes, suggest […]
https://vblwp.azureedge.net/wordpress/2017/09/vbl_logo_no_icon.png00Haig Didizianhttps://vblwp.azureedge.net/wordpress/2017/09/vbl_logo_no_icon.pngHaig Didizian2017-01-01 00:00:002017-01-01 00:00:00Sclerostin influences body composition by regulating catabolic and anabolic metabolism in adipocytes
De novo formation of the biliary system by TGFß-mediated hepatocyte transdifferentiation
Transdifferentiation is a complete and stable change in cell identity that serves as an alternative to stem-cell-mediated organ regeneration. In adult mammals, findings of transdifferentiation have been limited to the replenishment of cells lost from preexisting structures, in the presence of a fully developed scaffold and niche1. Here we show that transdifferentiation of hepatocytes in […]
Neuronal control of astrocytic respiration through a variant of the Crabtree effect
Aerobic glycolysis is a phenomenon that in the long term contributes to synaptic formation and growth, is reduced by normal aging, and correlates with amyloid beta deposition. Aerobic glycolysis starts within seconds of neural activity and it is not obvious why energetic efficiency should be compromised precisely when energy demand is highest. Using genetically encoded […]
The exerkine apelin reverses age-associated sarcopenia
Sarcopenia, the degenerative loss of skeletal muscle mass, quality and strength, lacks early diagnostic tools and new therapeutic strategies to prevent the frailty-to-disability transition often responsible for the medical institutionalization of elderly individuals. Herein we report that production of the endogenous peptide apelin, induced by muscle contraction, is reduced in an age-dependent manner in humans […]
A midline thalamic circuit determines reactions to visual threat
How our internal state is merged with our visual perception of an impending threat to drive an adaptive behavioural response is not known. Mice respond to visual threats by either freezing or seeking shelter. Here we show that nuclei of the ventral midline thalamus (vMT), the xiphoid nucleus (Xi) and nucleus reuniens (Re), represent crucial […]
Hepatocyte-secreted DPP4 in obesity promotes adipose inflammation and insulin resistance
Obesity-induced metabolic disease involves functional integration among several organs via circulating factors, but little is known about crosstalk between liver and visceral adipose tissue (VAT)1. In obesity, VAT becomes populated with inflammatory adipose tissue macrophages (ATMs)2,3. In obese humans, there is a close correlation between adipose tissue inflammation and insulin resistance4,5, and in obese mice, […]
Laminar Flow Attenuates Macrophage Migration Inhibitory Factor Expression in Endothelial Cells
Macrophage migration inhibitory factor (MIF) is a non-canonical cytokine that is involved in multiple inflammatory diseases, including atherosclerosis. High MIF expression found in leukocytes which facilitates the initiation and progression of atherosclerosis. However, little is known about biomechanical forces in the induction of MIF in endothelial cells (ECs). Here, we show that laminar shear stress […]
mTORC2 Promotes Tumorigenesis via Lipid Synthesis
Dysregulated mammalian target of rapamycin (mTOR) promotes cancer, but underlying mechanisms are poorly understood. We describe an mTOR-driven mouse model that displays hepatosteatosis progressing to hepatocellular carcinoma (HCC). Longitudinal proteomic, lipidomics, and metabolomic analyses revealed that hepatic mTORC2 promotes de novo fatty acid and lipid synthesis, leading to steatosis and tumor development. In particular, mTORC2 […]
Sclerostin influences body composition by regulating catabolic and anabolic metabolism in adipocytes
Sclerostin has traditionally been thought of as a local inhibitor of bone acquisition that antagonizes the profound osteoanabolic capacity of activated Wnt/ß-catenin signaling, but serum sclerostin levels in humans exhibit a correlation with impairments in several metabolic parameters. These data, together with the increased production of sclerostin in mouse models of type 2 diabetes, suggest […]