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| Open AccessSUCLA2 mutations cause global protein succinylation contributing to the pathomechanism of a hereditary mitochondrial disease
The pathomechanism of succinyl-CoA ligase (SCL) deficiency, a hereditary mitochondrial disease, is not fully understood. Here, the authors show that increased succinyl-CoA levels contribute to SCL pathology by causing global protein hyper-succinylation.
- Philipp Gut
- , Sanna Matilainen
- & Eric Verdin
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Article
| Open AccessVav2 catalysis-dependent pathways contribute to skeletal muscle growth and metabolic homeostasis
Skeletal muscle plays a key role in regulating systemic glucose and metabolic homeostasis. Here, the authors show that the catalytic activity of Vav2, an activator of Rho GTPases, modulates those processes by favoring the responsiveness of this tissue to insulin and related factors.
- Sonia Rodríguez-Fdez
- , L. Francisco Lorenzo-Martín
- & Xosé R. Bustelo
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Article
| Open AccessVascular surveillance by haptotactic blood platelets in inflammation and infection
Breakdown of vascular barriers is a major complication of inflammatory diseases. However, the mechanisms underlying platelet recruitment to inflammatory micro-environments remains unclear. Here, the authors identify haptotaxis as a key effector function of immune-responsive platelets
- Leo Nicolai
- , Karin Schiefelbein
- & Florian Gaertner
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Article
| Open AccessMEKK2 mediates aberrant ERK activation in neurofibromatosis type I
Neurofibromatosis type I (NF1) is characterized by prominent skeletal abnormalities mediated in part by aberrant ERK pathway activation due to NF1 loss-of-function. Here, the authors report the MEKK2 is a key mediator of this aberrant ERK activation and that MEKK2 inhibitors, including ponatinib, ameliorate skeletal defects in a mouse model of NF1.
- Seoyeon Bok
- , Dong Yeon Shin
- & Matthew B. Greenblatt
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Article
| Open AccessDistinct CCK-positive SFO neurons are involved in persistent or transient suppression of water intake
Water intake is critical to our life, and the subfornical organ in the brain involved in the control of this behavior. Here, the authors reveal that two distinct groups of CCK-producing neurons in the SFO suppress water intake according to the physiological condition or water-intake stimulus.
- Takashi Matsuda
- , Takeshi Y. Hiyama
- & Masaharu Noda
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Article
| Open AccessAlpha-ketoglutarate ameliorates age-related osteoporosis via regulating histone methylations
α-ketoglutarate is an intermediate of the Krebs Cycle that was recently reported to extend lifespan in C.Elegans. Here, the authors show that administration of α-ketoglutarate to mice reduces age-related bone loss, by ameliorating senescence of bone-marrow derived mesenchymal stem cells.
- Yuan Wang
- , Peng Deng
- & Quan Yuan
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Article
| Open AccessA circular RNA generated from an intron of the insulin gene controls insulin secretion
Circular RNAs contribute to the regulation of β-cell specific functions. Here the authors show that a circular RNA derived from one of the introns of the insulin gene is necessary for optimal insulin secretion from pancreatic islets and that its level is reduced in the islets of diabetic subjects.
- Lisa Stoll
- , Adriana Rodríguez-Trejo
- & Romano Regazzi
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| Open AccessBrainPhys neuronal medium optimized for imaging and optogenetics in vitro
Current media for neuronal cell and organoid cultures are suboptimal for functional imaging and optogenetics experiments, owing to phototoxicity and unphysiological performance. Here the authors formulate an optimised neuronal medium to support live cell imaging and electrophysiological activity.
- Michael Zabolocki
- , Kasandra McCormack
- & Cedric Bardy
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Article
| Open AccessYAP and TAZ protect against white adipocyte cell death during obesity
The expansion of the white adipose tissue during obesity is accompanied by increased cellular stress, but factors that protect adipocytes from cell death are not well known. Here the authors report that the transcriptional co-activators YAP and TAZ are activated in adipocytes during obesity, which increases adipocyte survival through the proapoptotic factor BIM.
- Lei Wang
- , ShengPeng Wang
- & Stefan Offermanns
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Article
| Open AccessThe desensitization pathway of GABAA receptors, one subunit at a time
GABAA receptors mediate most inhibitory synaptic transmission in the brain. Here authors used concatemeric α1β2γ2 GABAA receptors to introduce gain-of-desensitization mutations one subunit at a time, revealing non-concerted rearrangements with a key contribution of the γ2 subunit during desensitization.
- Marc Gielen
- , Nathalie Barilone
- & Pierre-Jean Corringer
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Article
| Open AccessPrevalent and sex-biased breathing patterns modify functional connectivity MRI in young adults
Functional connectivity measured from fMRI data is widely used in neuroscience. Here the authors report an association between two types of breathing signature and obtained BOLD data, and associated sex differences.
- Charles J. Lynch
- , Benjamin M. Silver
- & Jonathan D. Power
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Article
| Open AccessAKAP5 complex facilitates purinergic modulation of vascular L-type Ca2+ channel CaV1.2
Molecular mechanisms by which glucose modulates L-type Ca2+ channel activity and vascular reactivity are unclear. Here the authors report a nanocomplex orchestrated by AKAP5 that facilitates local purinergic stimulation of L-type Ca2+ channels and vasoconstriction during diabetic hyperglycemia.
- Maria Paz Prada
- , Arsalan U. Syed
- & Madeline Nieves-Cintrón
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Article
| Open AccessA causal role for frontal cortico-cortical coordination in social action monitoring
Social interactions require monitoring others’ actions to optimally organise one’s own actions. Here, the authors show that the pathway from the ventral premotor cortex (PMv) to the medial prefrontal cortex (MPFC) is causally involved in monitoring observed, but not executed, actions.
- Taihei Ninomiya
- , Atsushi Noritake
- & Masaki Isoda
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Article
| Open AccessCardio-centric hemodynamic management improves spinal cord oxygenation and mitigates hemorrhage in acute spinal cord injury
Clinical neuroprotective strategies for acute spinal cord injury (SCI) have largely overlooked the heart. Here the authors show cardiac contractility is immediately impaired in a porcine model of T2 SCI, and cardio-centric treatment with dobutamine optimizes cord oxygenation and mitigates haemorrhage.
- Alexandra M. Williams
- , Neda Manouchehri
- & Christopher R. West
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Article
| Open AccessLeptin alters energy intake and fat mass but not energy expenditure in lean subjects
Leptin treatment is effective to reduce body weight in animal models, but patients with obesity and associated hyperleptinemia do not respond well to leptin therapy. Here the authors report a retrospective analysis of four clinical trials in normo- and mildly hypoleptinemic individuals and show that leptin therapy alters food intake in the short term and reduces weight and fat mass in the long term without effects on energy expenditure.
- Pavlina Chrysafi
- , Nikolaos Perakakis
- & Christos S. Mantzoros
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Article
| Open AccessAdaptive thermogenesis enhances the life-threatening response to heat in mice with an Ryr1 mutation
Individuals with malignant hyperthermia susceptibility (MHS) suffer from lifethreatening responses to heat. Here the authors demonstrate that adaptive thermogenesis from brown adipose tissue contributes to this heat sensitivity in a preclinical mouse model of MHS
- Hui J. Wang
- , Chang Seok Lee
- & Susan L. Hamilton
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Article
| Open AccessThe reductive glycine pathway allows autotrophic growth of Desulfovibrio desulfuricans
There are several pathways for CO2 fixation in photoautotrophic and chemoautotrophic microorganisms. Here, the authors provide experimental demonstration for the operation of the reductive glycine pathway in a natural microorganism, Desulfovibrio desulfuricans.
- Irene Sánchez-Andrea
- , Iame Alves Guedes
- & Alfons J. M. Stams
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Article
| Open AccessHuman running performance from real-world big data
Laboratory performance tests provide the gold standard for running performance but do not reflect real running conditions. Here the authors use a large, real world dataset obtained from wearable exercise trackers to extract parameters that accurately predict race times and correlate with training.
- Thorsten Emig
- & Jussi Peltonen
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Article
| Open AccessRemote ischemic conditioning counteracts the intestinal damage of necrotizing enterocolitis by improving intestinal microcirculation
Necrotizing enterocolitis (NEC) is one of the most lethal gastrointestinal emergencies in neonates needing precision treatment. Here the authors show that remote ischemic conditioning is a non-invasive therapeutic method that enhances blood flow in the intestine, reduces damage, and improves NEC outcome.
- Yuhki Koike
- , Bo Li
- & Agostino Pierro
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Article
| Open AccessModeling lung perfusion abnormalities to explain early COVID-19 hypoxemia
Early stages of the novel coronavirus disease (COVID-19) have been associated with silent hypoxia and poor oxygenation despite relatively small fractions of afflicted lung. Here, the authors present a mathematical model which reproduces the vascular pulmonary mechanisms observed in patients with early COVID-19.
- Jacob Herrmann
- , Vitor Mori
- & Béla Suki
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Article
| Open AccessMacrophage secretion of miR-106b-5p causes renin-dependent hypertension
Myeloid cells are involved in hypertension, but their exact role in renin-induced hypertension remains unclear. Here the authors show that impaired vitamin D signaling in myeloid cells causes hypertension via macrophage-specific miR-106b-5p secretion, which activates renin production in the kidney.
- J. Oh
- , S. J. Matkovich
- & C. Bernal-Mizrachi
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Article
| Open AccessEnteroendocrine cells couple nutrient sensing to nutrient absorption by regulating ion transport
Enteroendocrine cells (EECs) are specialized gastrointestinal cells that have a role in nutrient sensing and hormone secretion. Here the authors show that peptide YY from EECs regulates nutrient absorption in intestinal organoids.
- Heather A. McCauley
- , Andrea L. Matthis
- & James M. Wells
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Article
| Open AccessRegulation of cellular sterol homeostasis by the oxygen responsive noncoding RNA lincNORS
Noncoding transcripts contribute to the adaptation of cellular processes to oxygen levels. Here the authors characterize a hypoxia responsive lncRNA lincNORS and show that it has a role in cellular sterol homeostasis.
- Xue Wu
- , Cristina M. Niculite
- & Mircea Ivan
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Article
| Open AccessIntercalated disc protein Xinβ is required for Hippo-YAP signaling in the heart
Intercalated discs ensure mechanical and electrochemical coupling during contraction of the heart. Here, the authors show that loss of Xinβ results in cardiomyocyte proliferation defects and cardiomyopathy by influencing the Hippo-YAP signalling pathway, thus affecting cardiac development and function.
- Haipeng Guo
- , Yao Wei Lu
- & Da-Zhi Wang
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Article
| Open AccessAge and life expectancy clocks based on machine learning analysis of mouse frailty
The discovery of interventions that slow aging could be accelerated by employing non-invasive biometrics that predict biological age or life expectancy. Here the authors use longitudinal frailty data from naturally aging mice to develop two such tools, that are responsive to interventions.
- Michael B. Schultz
- , Alice E. Kane
- & David A. Sinclair
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Article
| Open AccessThe neuromuscular junction is a focal point of mTORC1 signaling in sarcopenia
mTORC1 expression is increased during ageing of muscle, and on the other hand, its activation promotes muscle hypertrophy. Here, the authors assess whether mTORC1 has positive or negative effects on ageing, and show that its long-term inhibition preserves muscle mass and function and neuromuscular junction integrity, whereas muscle-specific activation is associated with sarcopenia.
- Daniel J. Ham
- , Anastasiya Börsch
- & Markus A. Rüegg
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| Open AccessCerebrovascular risk factors impact frontoparietal network integrity and executive function in healthy ageing
Cerebrovascular risk factors reduce cognitive performance via changes in the integrity of a frontoparietal brain network in ageing. Modification of blood pressure, with antihypertensive treatment in mid-life, mitigates against cognitive decline over a specific blood pressure range.
- Michele Veldsman
- , Xin-You Tai
- & Masud Husain
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Article
| Open AccessMitochondrial CaMKII causes adverse metabolic reprogramming and dilated cardiomyopathy
Little is known about how cardiac metabolism remodels following cardiac injury. Here, the authors show that mitochondrial CaMKII plays an important role in remodeling cardiac metabolism after injury and that replacement of mitochondrial creatine kinase improves energetics and protects against adverse remodeling.
- Elizabeth D. Luczak
- , Yuejin Wu
- & Mark E. Anderson
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| Open AccessPharmacologically reversible zonation-dependent endothelial cell transcriptomic changes with neurodegenerative disease associations in the aged brain
Blood–brain barrier dysfunction occurs in ageing and in neurodegenerative diseases. Here, the authors use scRNA-seq to identify transcriptomic changes in endothelial cell subtypes in the aged mouse brain, some of which may generalize to human and can be reversed by treatment with a GLP-1R agonist.
- Lei Zhao
- , Zhongqi Li
- & Ho Ko
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Article
| Open AccessFeeding-dependent tentacle development in the sea anemone Nematostella vectensis
How the developmental capacity of long-lived animals copes with fluctuations in the food supply is unclear. Here, the authors show using the sea anemone Nematostella vectensis that the crosstalk between Target of Rapamycin and fibroblast growth factor signalling in ring muscles links postembryonic tentacle patterning with food availability.
- Aissam Ikmi
- , Petrus J. Steenbergen
- & Matthew C. Gibson
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Article
| Open AccessInherited salt-losing tubulopathies are associated with immunodeficiency due to impaired IL-17 responses
Salt levels in culture affect the polarisation of Th17 cells, which normally protect the host from fungal and bacterial infections. Here, the authors study patients with salt-losing tubulopathies (SLT) to find that, while Th17 immunity is dampened in SLT patients, their Th17-inducing signaling pathways are intact and can be reinvigorated by exogenous salt.
- Rhys D. R. Evans
- , Marilina Antonelou
- & Alan D. Salama
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Article
| Open AccessIntracellular sodium elevation reprograms cardiac metabolism
The failing heart is characterised by both alterations in mitochondrial metabolism and an elevation of cytosolic sodium. Here, the authors use 23Na NMR and metabolic profiling to show these are related, and that elevation in intracellular Na reprograms cardiac substrate utilisation via effects on mitochondrial Na/Ca exchange.
- Dunja Aksentijević
- , Anja Karlstaedt
- & Michael J. Shattock
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Article
| Open AccessDisruption of Cav1.2-mediated signaling is a pathway for ketamine-induced pathology
Ketamine is a general anesthetic that is used also as an anti-depressant, but its use is associated with cystitis. Here, the authors show that ketamine is an antagonist of the Cav1.2 channel in bladder smooth muscle cells, that ablation of this channel in mice mimics the cystitis induced by ketamine, and show that this effect can be abrogated by an agonist of this ion channel.
- Huan Chen
- , David H. Vandorpe
- & Weiqun Yu
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Article
| Open AccessCircadian clock mechanism driving mammalian photoperiodism
“Life in a seasonal environment requires appropriate timing of physiological changes to survive, but how the circadian clockwork times these changes remains unclear. Here the authors show that the circadian clock genes BMAL2 and DEC1, in concert with epigenetic pathways in the pituitary, have a central role in seasonal timekeeping in mammals.”
- S. H. Wood
- , M. M. Hindle
- & A. S. I. Loudon
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Article
| Open AccessSenolytics prevent mt-DNA-induced inflammation and promote the survival of aged organs following transplantation
Organ transplantation involving aged donors is often confounded by reduced post-transplantation organ survival. By studying both human organs and mouse transplantation models, here the authors show that pretreating the donors with senolytics to reduce mitochondria DNA and pro-inflammatory dendritic cells may help promote survival of aged organs.
- Jasper Iske
- , Midas Seyda
- & Stefan G. Tullius
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Article
| Open AccessTET1 is a beige adipocyte-selective epigenetic suppressor of thermogenesis
Epigenetic regulators contribute to the modulation of adipose thermogenesis by sensing environmental cues and regulating gene expression in response. Here the authors report that a DNA demethylase TET1 mediates epigenetic changes to repress thermogenic genes in mouse adipose tissue.
- Sneha Damal Villivalam
- , Dongjoo You
- & Sona Kang
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Article
| Open AccessA spike-timing-dependent plasticity rule for dendritic spines
The structural organization of excitatory inputs supporting spike-timing-dependent plasticity (STDP) in dendritic spines remains unknown. Using a spine STDP protocol, the authors uncover the STDP rules for single, clustered and distributed dendritic spines in the basal dendrites of layer 5 pyramidal neurons in juvenile mice.
- Sabrina Tazerart
- , Diana E. Mitchell
- & Roberto Araya
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Article
| Open AccessTissue sodium excess is not hypertonic and reflects extracellular volume expansion
Na+ has been suggested to accumulate in tissues, particularly skin, in a hypertonic manner and to exert local pathogenic effects. Here, we reappraise this phenomenon which is systemic in nature and reflects isotonic changes in the relative extracellular volume in tissues, e.g. subclinical oedema; as such, it occurs in human hypertension and aging.
- Giacomo Rossitto
- , Sheon Mary
- & Christian Delles
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Article
| Open AccessPrintable microscale interfaces for long-term peripheral nerve mapping and precision control
Modulation of peripheral nervous system signalling has many applications in medicine, neurobiology and machine-man interfaces. Here the authors develop a microscale implantable device for chronic interfacing with a small diameter nerve, and show multi-week in vivo recording and control of activity.
- Timothy M. Otchy
- , Christos Michas
- & Timothy J. Gardner
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Article
| Open AccessThe Rad53CHK1/CHK2-Spt21NPAT and Tel1ATM axes couple glucose tolerance to histone dosage and subtelomeric silencing
The relationship between DNA damage response (DDR) and regulation of the tolerance to glucose restriction is currently unclear. Here the authors reveal that maintaining a physiological level of histones by Rad53-Spt21 is necessary for glucose tolerance via multiple parallel pathways, including derepression of subtelomeric genes and acetyl-coA regulation by histone acetylation.
- Christopher Bruhn
- , Arta Ajazi
- & Marco Foiani
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Article
| Open AccessT-cells produce acidic niches in lymph nodes to suppress their own effector functions
T-cell activation primarily occurs in the lymph nodes, highly organized and specialized secondary lymphoid organs. Here the authors show that the acidic extracellular pH in lymph node paracortical zones limits cytokine production by effector T-cells, but does not alter their activation by antigen-presenting cells.
- Hao Wu
- , Veronica Estrella
- & Robert J. Gillies
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Article
| Open AccessScavenging of reactive dicarbonyls with 2-hydroxybenzylamine reduces atherosclerosis in hypercholesterolemic Ldlr−/− mice
Hypercholesterolemia is associated with lipid peroxidation induced reactive dicarbonyl adducts. Here the authors show that the dicarbonyl scavenger, 2-hydroxybenzylamine(2-HOBA), decreases reactive dicarbonyl modifications of LDL and HDL, improves HDL function, reduces atherosclerosis and promotes features of stable plaques in a mouse model of hypercholestrolemia.
- Huan Tao
- , Jiansheng Huang
- & MacRae F. Linton
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Article
| Open AccessSingle-trial cross-area neural population dynamics during long-term skill learning
Learning skilled movements requires evolution in neural population dynamics both within and across cortical regions. Here, the authors combine simultaneous recordings of motor and premotor cortex with computational methods to show that single-trial cross-area dynamics correlate with single-trial behavior performance and skill acquisition.
- T. L. Veuthey
- , K. Derosier
- & K. Ganguly
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Article
| Open AccessPupil-linked arousal signals track the temporal organization of events in memory
Although everyday life unfolds continuously, we tend to remember past experiences as discrete events. Here, the authors show that dynamic, pupil-linked arousal states track the encoding of such episodes, as revealed by changes in memory for the temporal order and duration of recent event sequences.
- David Clewett
- , Camille Gasser
- & Lila Davachi
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Article
| Open AccessSingle-cell analysis uncovers fibroblast heterogeneity and criteria for fibroblast and mural cell identification and discrimination
To define and distinguish fibroblasts from vascular mural cells have remained challenging. Here, using single-cell RNA sequencing and tissue imaging, the authors provide a molecular basis for cell type classification and reveal inter- and intra-organ diversity of these cell types.
- Lars Muhl
- , Guillem Genové
- & Christer Betsholtz
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Article
| Open AccessNanoproteomics enables proteoform-resolved analysis of low-abundance proteins in human serum
Top-down proteomics can provide unique insights into the biological variations of protein biomarkers but detecting low-abundance proteins in body fluids remains challenging. Here, the authors develop a nanoparticle-based top-down proteomics approach enabling enrichment and detailed analysis of cardiac troponin I in human serum.
- Timothy N. Tiambeng
- , David S. Roberts
- & Ying Ge
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Article
| Open AccessParaventricular hypothalamus mediates diurnal rhythm of metabolism
Defective rhythmic metabolism is associated with high-fat diet feeding and obesity. The authors show that the clock gene BMAL1 drives paraventricular hypothalamic neuron activity via rhythmic GABAergic neurotransmission, and that this mediates diurnal metabolism and diet-induced obesity.
- Eun Ran Kim
- , Yuanzhong Xu
- & Qingchun Tong
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Article
| Open AccessA molecular map of murine lymph node blood vascular endothelium at single cell resolution
The origin and diversity of blood vascular endothelial cells (BEC) in lymphoid tissues is unclear. Here, the authors profile murine BECs from peripheral lymph nodes by single cell analysis and identify subsets of cells specialised for immune cell recruitment and vascular homeostasis.
- Kevin Brulois
- , Anusha Rajaraman
- & Eugene C. Butcher
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Article
| Open AccessAssociations of cardiovascular biomarkers and plasma albumin with exceptional survival to the highest ages
Supercentenarians are approaching the current longevity limit by avoiding or surviving major illness, thus identifying biomarkers for exceptional survival might provide insights into the protection against disease of aging. Here, the authors show low NT-proBNP and high albumin in plasma are the biological correlates of survival to the highest ages.
- Takumi Hirata
- , Yasumichi Arai
- & Nobuyoshi Hirose