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Kwak et al. identify a mixture of monogenic, rare and common genetic variants of youth-onset type 2 diabetes (T2D), highlighting the heterogeneity of youth-onset T2D and positioning it on a genetic spectrum between monogenic diabetes and adult-onset T2D.
Miotto et al. show that in mice, liver-derived extracellular vesicles act on skeletal muscle and the pancreas and increase glucose effectiveness and insulin secretion, thereby modulating glycaemic control.
Higher milk intake is associated with lower type 2 diabetes risk in lactase non-persistent individuals, partly through gut microbiome and blood metabolites.
During ageing, S-adenosylmethionine (SAM) is depleted from muscle stem cells (MuSCs) because of increased synthesis of the polyamine spermidine, leading to loss of heterochromatin and dysfunction of MuSCs. SAM restoration rescues the mouse MuSC defects.
Electron-transfer flavoprotein dehydrogenase (ETFDH) is shown to associate with mitochondrial complex III (CIII) physically and functionally, thereby promoting electron channelling to increase CIII efficiency.
Yu et al. show that inhibition of p21-activated kinase 4 (PAK4) ameliorates insulin resistance and enhances lipolysis by reducing phosphorylation of fatty acid-binding protein 4 (FABP4) and hormone-sensitive lipase (HSL). In parallel, PAK4 inhibition increases energy expenditure.
Stegen et al. show that serine metabolism is transiently upregulated during osteoclastogenesis, and it drives osteoclast differentiation via epigenetic regulation of NFATc1 expression.
Using several orthogonal loss-of-function approaches, Huang et al. provide a detailed assessment of the quantitative contribution of δ cell paracrine signalling to the glycaemic set point in mice.
Zhang et al. show that in mice, an adipocyte population with high expression of the transcription factor JunB in the brown adipose tissue shows reduced thermogenic capacity. Depletion of JunB increases the fraction of adipocytes with high thermogenic capacity and ameliorates diet-induced insulin resistance.
Systematic evaluation of glucose control, body mass index, blood pressure, insulin secretion and insulin resistance is leveraged to identify patients who are likely to receive the greatest metabolic benefit from common antidiabetic drugs.
Todorova et al. characterize the strategies through which embryos secure amino acid supply during the early phases of development. Their findings show that, in the preimplantation phase, embryos uptake whole proteins through macropinocytosis and, over time, they shift towards soluble amino acid uptake. This strategy may contribute to protecting embryos from nutrient fluctuations.
Wei et al. show that proteolytic cleavage of fatty acid synthase (FASN) upon stress contributes to stress resolution. This role in stress resolution of the resulting C-terminal fragment of FASN is independent of its canonical function in fatty acid synthesis.
Li, Barros et al. decipher how distinct mechanisms of protein sensing in the upper small intestine and ileum regulate food intake, glucose homeostasis and gut hormone release in male rats.
Mosteiro et al. show that inhibition of Notch, a signaling pathway frequently associated with cell-fate decisions during development, impairs thyrocyte homeostasis in an active subset of thyrocytes in adult mice through mitochondrial dysfunction and decreased ROS, thereby causing hypothyroidism.
Iron is shown to have a central role in senescence, both by triggering senescence and through its accumulation in senescent cells, which is driving the senescence-associated secretory phenotype and, in turn, promotes fibrogenesis.
In this study, Papalazarou et al. screen the solute carrier family and identify candidates involved of serine transport in colorectal cancer cells. They further characterize cytosolic SLC6A14 and mitochondrial SLC25A15 as mediators of adequate serine supply to sustain cancer cell proliferation.
In a two-part randomized phase 2a trial in men and women with overweight or obesity and type 2 diabetes mellitus, cotadutide promoted greater reductions in liver glycogen and fat than placebo and liraglutide.
Shoop et al. develop mitoARCUS, a mitochondria-targeted nuclease with high specificity, to correct a relatively common pathogenic mtDNA mutation, allowing for beneficial shifts in heteroplasmy while reducing nuclear off-target gene editing.
Efferocytosis-induced macrophage proliferation is supported by increased non-canonical upregulation of glycolysis. Ngai, Schilperoort and Tabas provide mechanistic insight to understand how glycolysis-derived lactate contributes to this process by stabilizing MYC via extracellular signalling.
Hildreth et al. show that during diet-induced obesity, conventional type 1 dendritic cells (cDC1s) in white adipose tissue (WAT) take up DNA-containing apoptotic bodies from adipocytes, which triggers STING-dependent interleukin-12 production from cDC1s, contributing to WAT inflammation in mice.